CN112850964A - Petrochemical oily sewage suspension sludge bed treatment method and system - Google Patents
Petrochemical oily sewage suspension sludge bed treatment method and system Download PDFInfo
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
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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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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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Abstract
The invention discloses a treatment method and a treatment system for a suspended sludge bed of petrochemical oily sewage. The suspended sludge bed treatment method for the petrochemical oily sewage comprises the following steps: A. adding a water purifying agent and a flocculating agent into the sewage; B. introducing the sewage added with the water purifying agent and the flocculating agent into a tank type mixer for uniformly mixing; C. and (3) introducing the sewage uniformly mixed in the tank type mixer into an SSF sewage purifier, and adding a coagulant aid between the tank type mixer and the SSF sewage purifier. The invention provides a suspended sludge bed treatment method and a suspended sludge bed treatment system for petrochemical oily sewage, which can effectively remove oil in the sewage.
Description
Technical Field
The invention relates to the technical field of sewage oil removal, in particular to a suspended sludge bed treatment method and system for petrochemical oily sewage.
Background
In the process of exploiting the oil field, can produce a large amount of oily sewage, to the treatment process of oily sewage at present, the deoiling effect of sewage is all too unsatisfactory, and the deoiling rate of sewage is lower, especially to the removal effect of the polar oil in the sewage relatively poor, and most deoiling processes are complicated, and the cost is higher, and sewage treatment cycle is long, and the operating mode is unstable.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to provide a suspended sludge bed treatment method for petrochemical oily sewage and an SSF sewage oil removal system, and aims to solve the problem of low oil removal rate of a sewage oil removal process in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a suspended sludge bed treatment method for petrochemical oily sewage comprises the following steps:
A. adding a water purifying agent and a flocculating agent into the sewage;
B. introducing the sewage added with the water purifying agent and the flocculating agent into a tank type mixer for uniformly mixing;
C. and (3) introducing the sewage uniformly mixed in the tank type mixer into an SSF sewage purifier, and adding a coagulant aid between the tank type mixer and the SSF sewage purifier.
In an alternative embodiment of the invention, the water purifying agent, the flocculating agent and the coagulant aid are added in the following ratio: 30-50 ppm: 50-100 ppm: 2 ppm.
In an alternative embodiment of the invention, the water purifying agent, the flocculating agent and the coagulant aid are added in the following ratio: 30 ppm: 50 ppm: 2 ppm.
In an alternative embodiment of the present invention, step a is preceded by:
s, preparing a water purifying agent, a flocculating agent and a coagulant aid.
In an alternative embodiment of the invention, the water purifying agent is formulated at a concentration of 5%, the flocculating agent is formulated at a concentration of 5%, and the coagulant aid is formulated at a concentration of 0.5%.
In an optional embodiment of the present invention, step C further includes:
D. and when the effluent turbidity of the SSF sewage purifier is greater than or equal to 20mg/L, discharging sludge from the SSF sewage purifier.
A petrochemical oily sewage suspended sludge bed processing system for realizing the above petrochemical oily sewage suspended sludge bed processing method comprises a tank mixer and an SSF sewage purifier connected with the tank mixer, wherein a water pump is arranged at the front end of the tank mixer.
In an alternative embodiment of the present invention, the SSF sewage purifier includes:
a tank body;
the conical fluid director is arranged at the bottom of the tank body, and a closed sludge concentration chamber is formed among the side wall of the conical fluid director, the side wall of the tank body and the bottom of the tank body;
the central cylinder is arranged in the center of the conical fluid director and is communicated with the sludge concentration chamber so that sludge in the central cylinder enters the sludge concentration chamber;
the water inlet pipe is arranged at the bottom of the tank body, one end of the water inlet pipe is connected with the bottom of the conical fluid director, and the other end of the water inlet pipe is connected with the tank type mixer;
the water outlet pipe is arranged at the top of the tank body;
and one end of the sludge discharge pipe is communicated with the sludge concentration chamber, and the other end of the sludge discharge pipe is connected to an external sludge pool.
In an optional embodiment of the present invention, a straight cylinder portion is disposed at a bottom of the tapered flow director, the water inlet pipe is connected to the straight cylinder portion, and the water inlet pipe is disposed along a tangential direction of the straight cylinder portion, so that sewage in the water inlet pipe rises spirally after entering the tapered flow director.
In an alternative embodiment of the present invention, the number of the water pumps is three, and the number of the SSF sewage purifiers is two.
The invention has the advantages that:
adding a water purifying agent to adsorb partial dissolved pollutants and colloidal particles (including emulsified oil) in sewage to form micro suspended particles, separating the micro suspended particles from the sewage, then adopting a flocculating agent and a coagulant aid to agglomerate various colloidal particles and suspended particles in the sewage into large compact flocs, and quickly separating the flocs from water in an SSF sewage purifier by means of the fluid mechanics principles such as syntropy agglomeration, filtering hydraulics and the like to form a suspended sludge layer, wherein the compact suspended sludge layer is used as a filter layer to form a dynamic balance filtering system, so that suspended matters and oil-containing particles in the water can be effectively removed, and oil removal is realized; the sewage added with the water purifying agent and the flocculating agent flows into the tank type mixer first to be mixed uniformly, so that the agent and the sewage are fully mixed, and the oil removing effect is improved.
Drawings
FIG. 1 is a block diagram showing a flow of a suspended sludge bed treatment method for petrochemical oily sewage in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a suspended sludge bed treatment system for petrochemical oily sewage in an embodiment of the present invention;
FIG. 3 is a schematic structural view of an SSF sewage purifier in an embodiment of the present invention;
FIG. 4 is a schematic structural view of a suspended sludge bed treatment system for petrochemical oily sewage in another embodiment of the present invention;
FIG. 5 is a diagram showing the effect of the suspended sludge bed treatment system for petrochemical oily sewage on the removal of total oil in sewage according to the present invention;
FIG. 6 is a diagram showing the effect of the suspended sludge bed treatment system for petrochemical oily sewage on removing polar oil in sewage.
In the figure:
10. a tank mixer; 20. an SSF sewage purifier; 30. a water pump;
21. a tank body; 22. a conical flow director; 23. a central barrel; 24. a water inlet pipe; 25. a water outlet pipe; 26. a sludge draining pipe; 27. a sludge concentration chamber; 28. a sampling port.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The invention provides a suspended sludge bed treatment method for petrochemical oily sewage, which comprises the following steps:
s100, adding a water purifying agent and a flocculating agent into the sewage;
s200, introducing the sewage added with the water purifying agent and the flocculating agent into a tank type mixer and uniformly mixing;
s300, introducing the uniformly mixed sewage in the tank type mixer into an SSF sewage purifier, and adding a coagulant aid between the tank type mixer and the SSF sewage purifier.
An SSF sewage purifier is a purifying device, in the suspended sludge bed processing method of the invention, a water purifying agent is added into sewage to lead partial dissolved pollutants and colloidal particles (including emulsified oil) in the sewage to be adsorbed out to form micro suspended particles which are separated from the sewage, then various colloidal particles and suspended particles in the sewage are agglomerated into massive compact flocs by adopting a flocculating agent and a coagulant aid, the flocs and water are rapidly separated in the SSF sewage purifier to form a suspended sludge layer, and the compact suspended sludge layer is used as a filter layer to form a dynamic balance filtering system which can effectively remove suspended matters and oily particles in the water and realize oil removal; the sewage added with the water purifying agent and the flocculating agent flows into the tank type mixer first to be mixed uniformly, so that the agent and the sewage are fully mixed, and the oil removing effect is improved.
Based on the above-mentioned petrochemical oily sewage suspended sludge bed treatment method, the present invention further provides a petrochemical oily sewage suspended sludge bed treatment system, fig. 2 is a schematic structural diagram of the petrochemical oily sewage suspended sludge bed treatment system in the embodiment of the present invention, as shown in fig. 2, the petrochemical oily sewage suspended sludge bed treatment system includes a tank mixer 10 and an SSF sewage purifier 20 connected to the tank mixer 10, a water pump 30 is disposed at the front end of the tank mixer 10, the water pump 30 is connected to a device for providing sewage, such as an oil removal tank, etc., the water pump 30 pumps the sewage from the oil removal tank into the tank mixer 10, as shown in fig. 2, a water purifying agent and a flocculating agent are added in front of the tank mixer 10, the sewage added with the water purifying agent and the flocculating agent flows into the tank mixer 10 to be mixed uniformly, and then flows into the SSF sewage purifier 20.
Fig. 3 is a schematic structural view of an SSF sewage purifier in an embodiment of the present invention, and as shown in fig. 3, the SSF sewage purifier 20 includes a tank 21, a tapered flow guide 22, a central cylinder 23, a water inlet pipe 24, a water outlet pipe 25, and a sludge discharge pipe 26. The conical fluid director 22 is arranged at the bottom of the tank body 21, the upper half part of the conical fluid director 22 is conical, the lower half part of the conical fluid director 22 is a cylindrical straight cylinder part, one end of the water inlet pipe 24 is connected with the straight cylinder part, and the other end of the water inlet pipe is connected with the tank type mixer 10, so that sewage enters the conical fluid director 22. A closed sludge concentration chamber 27 is formed between the side wall of the conical flow guide 22, the side wall of the tank body 21 and the bottom of the tank body 21, the central cylinder 23 is arranged in the center of the conical flow guide 22, and the central cylinder 23 is communicated with the sludge concentration chamber 27 so that sludge in the central cylinder 23 enters the sludge concentration chamber 27 and then is discharged from the sludge concentration chamber 27. The water outlet pipe 25 is arranged at the top of the tank body 21, one end of the sludge discharge pipe 26 is communicated with the sludge concentration chamber 27, and the other end is connected to an external sludge pool.
After water purifying agent, flocculating agent and coagulant aid are added before the sewage enters the SSF sewage purifier 20, various colloidal particles and suspended particles in the sewage are coagulated into massive compact flocs, and then the sewage enters the straight cylinder part of the conical fluid director 22 from the water inlet pipe 24 and moves from bottom to top along with the flocs, so that the lower surface layer of a mud layer in the conical fluid director 22 is continuously increased and thickened. Meanwhile, a clear water outlet is formed beside the sludge concentration chamber 27 and communicated to the water outlet pipe 25, the clear water flows along with the bypass of the sludge concentration chamber 27, the upper surface of the suspended sludge layer is guided to continuously flow into the central cylinder 23, the upper surface is continuously reduced and thinned, and the thickness of the suspended sludge layer achieves a dynamic balance. When sewage passes through the suspended sludge layer from bottom to top, the floc filter layer generates adsorption and filtration effects on suspended matters and oils by virtue of interface physical adsorption, net capture effect, electrochemical characteristics and van der waals force, and intercepts the suspended matters and the oils on the suspended sludge layer, so that the quality of effluent reaches the treatment requirement, and the effluent is discharged from a water outlet pipe 25 of the SSF sewage purifier 20.
Preferably, the water inlet pipe 24 is arranged along the tangential direction of the straight cylinder part of the conical fluid director 22, so that the sewage in the water inlet pipe 24 enters the conical fluid director 22 and then spirally rises, and the small flocs in the sewage form a compact suspended sludge bed layer by means of weak rotational flow water inlet, thereby realizing the interception of suspended matters and oils. Meanwhile, the suspension bed layer which is thickened continuously is led into the sludge concentration chamber 27 through the central cylinder 23 under the action of centripetal force and gravity formed by vortex, and the sludge can be discharged from the sludge discharge pipe 26 at regular time after being fully stored.
The SSF sewage purifier 20 breaks through the traditional static filter material mechanical filtration mode, skillfully designs the optimal scheme of adding medicaments according with Stokes' law and homodromous coagulation theory, and uses the suspended sludge layer which is dynamically slowly rotated and continuously updated as a filtration and purification medium, thereby realizing long-term stable filtration and purification without backwashing and blockage.
Fig. 4 is a schematic structural diagram of a suspended sludge bed treatment system for petrochemical oily sewage in another embodiment of the present invention, and as shown in fig. 4, there are three water pumps 30 in the suspended sludge bed treatment system for petrochemical oily sewage, specifically, three water pumps 30 may be used simultaneously, or two of them may be used, and the other one is ready for use. The number of the SSF sewage purifiers 20 is two, and the efficiency of sewage treatment can be improved by arranging two SSF sewage purifiers 20.
Example one
Preparing a water purifying agent, a flocculating agent and a coagulant aid in advance:
1) the preparation concentration of the water purifying agent is 5%, and 25kg of water purifying agent is taken and poured into 12 bags with the volume of 5.6m3Adding water to the dissolving tank, and starting the stirrer; the temperature of fresh water is less than 30 ℃, the hardness is less than 60mg/L, the suspended matters are less than 5mg/L, and the pH value is 6-9.
2) The preparation concentration of the flocculant is 5 percent, and 12 bags of flocculant with the net weight of 25kg are poured into the bags with the volume of 5.6m3Adding water to the dissolving tank, and starting the stirrer; the temperature of fresh water is less than 30 ℃, the hardness is less than 60mg/L, the suspended matters are less than 5mg/L, and the pH value is 6-9.
3) The preparation concentration of coagulant aid is 0.5%, 1.5kg of coagulant aid is taken, the stirrer is started, and the coagulant aid is slowly poured into the stirrer with stirring, wherein the volume of the coagulant aid is 1.6m3Adding water to the dissolving box; the temperature of fresh water is less than 30 ℃, the hardness is less than 60mg/L, the suspended matters are less than 5mg/L, and the pH value is 6-9.
When the SSF sewage purification system works, please refer to fig. 2, the adding ratio of the water purifying agent, the flocculating agent and the coagulant aid is: 30-50 ppm: 50-100 ppm: 2ppm, wherein ppm is the mass percent, preferably, the adding ratio of the water purifying agent, the flocculating agent and the coagulant aid is as follows: 30 ppm: 50 ppm: 2 ppm.
Fig. 5 shows the effect of the suspended sludge bed treatment system for petrochemical oily sewage to remove total oil in sewage, wherein the row of the "T101 tank" in table 1 represents the oil content in sewage before treatment, the "T101 tank" represents the oil removal tank, the oil content in sewage from the oil removal tank is high, and the sewage needs to be subjected to oil removal treatment. The "suspended bed" represents a suspended bed in the SSF sewage purifier 20, and the row in which the "suspended bed" is located represents the oil content in the sewage after being treated by the SSF sewage purifier 20. "double flotation" means the oil content of the wastewater obtained by the double flotation treatment process (a treatment process different from the SSF wastewater purifier 20). As can be seen from table 1: the average value of the total oil in the water discharged from the T101 tank is 58.9mg/L, the average value of the total oil in the water discharged from the suspension bed is 24.5mg/L, and the average value of the total oil in the water discharged from the second floating device of the field industrial device is 58.4 mg/L. The average value of the total oil removal rate of the suspension bed is 58.5 percent, and the suspension bed has higher oil removal effect.
In addition, as can be seen from fig. 5, the "suspended bed" tank has a strong impact resistance function, and the total oil curve of the outlet water is smooth.
FIG. 6 shows the effect of a suspended sludge bed treatment system for petrochemical oily sewage on the removal of polar oils from the sewage, as can be seen in FIG. 6: the average value of the polar oil in the water discharged from the T101 tank is 37.3mg/L, the average value of the polar oil in the water discharged from the 'suspension bed' tank is 16.1mg/L, the average value of the polar oil in the secondary floating water of the field industrial device is 32.1mg/L, and the average value of the polar oil removal rate of the 'suspension bed' tank is 57.0 percent, so that the method has a better polar oil removal effect.
In addition, as can be seen from fig. 6, the "suspension bed" tank has a strong impact resistance function, and the polar oil curve of the outlet water is smooth.
The sludge discharge period of the petrochemical oily sewage suspension sludge bed treatment system is as follows: generally, the mud discharging period is 24-48 hours, mud should be discharged in time when the effluent turbidity is greater than or equal to 20mg/L under the condition that the dosage and the water inflow are normal, and the effluent turbidity is greater than or equal to 20mg/L, namely the effluent turbidity of the water outlet pipe 25 of the SSF sewage purifier 20 is greater than or equal to 20 mg/L.
When the SSF sewage purifier 20 is fed with water, the dosing metering pumps are started to add the chemicals (the water purifying agent, the flocculating agent and the coagulant aid), the water outlet condition of the purifier is observed every 15 minutes, and the dosing amount of the dosing metering pumps is adjusted in time, so that the dosing amount reaches the optimal dosing amount. After the suspended sludge bed treatment system for petrochemical oily sewage is put into operation, sampling is carried out once every 2 hours at the sampling port 28 of the SSF sewage purifier 20, the water quality condition is observed, and the dosage is correspondingly adjusted, because the sampling port 28 is arranged at the upper end of the sludge concentration chamber 27, the bottom of the sludge concentration chamber 27 is sludge, and the upper layer of the sludge concentration chamber 27 is clear water, the water quality condition can be observed through the clear water flowing out from the position. And disassembling and flushing the filter screen of the dosing pipeline once every 24-48 hours.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A suspended sludge bed treatment method for petrochemical oily sewage is characterized by comprising the following steps:
A. adding a water purifying agent and a flocculating agent into the sewage;
B. introducing the sewage added with the water purifying agent and the flocculating agent into a tank type mixer for uniformly mixing;
C. and (3) introducing the sewage uniformly mixed in the tank type mixer into an SSF sewage purifier, and adding a coagulant aid between the tank type mixer and the SSF sewage purifier.
2. The suspended sludge bed treatment method for petrochemical oily sewage according to claim 1, wherein the adding ratio of the water purifying agent to the flocculating agent to the coagulant aid is as follows: 30-50 ppm: 50-100 ppm: 2 ppm.
3. The suspended sludge bed treatment method for petrochemical oily sewage according to claim 1, wherein the adding ratio of the water purifying agent to the flocculating agent to the coagulant aid is as follows: 30 ppm: 50 ppm: 2 ppm.
4. The suspended sludge blanket treatment method for petrochemical oily sewage according to claim 1, which is characterized by further comprising the following step before the step A:
s, preparing a water purifying agent, a flocculating agent and a coagulant aid.
5. The suspended sludge bed treatment method for petrochemical oily sewage according to claim 4, wherein the preparation concentration of the water purifying agent is 5%, the preparation concentration of the flocculating agent is 5%, and the preparation concentration of the coagulant aid is 0.5%.
6. The suspended sludge blanket treatment method for petrochemical oily sewage according to claim 1, which further comprises after the step C:
D. and when the effluent turbidity of the SSF sewage purifier is greater than or equal to 20mg/L, discharging sludge from the SSF sewage purifier.
7. A suspended sludge blanket treatment system for petrochemical oily sewage, which is used for realizing the suspended sludge blanket treatment method for petrochemical oily sewage according to any one of claims 1 to 6, and is characterized by comprising a tank mixer (10) and an SSF sewage purifier (20) connected with the tank mixer (10), wherein a water pump (30) is arranged at the front end of the tank mixer (10).
8. The suspended sludge blanket treatment system for petrochemical oily sewage according to claim 7, wherein the SSF sewage purifier (20) comprises:
a tank body (21);
the conical fluid director (22) is arranged at the bottom of the tank body (21), and a closed sludge concentration chamber (27) is formed between the side wall of the conical fluid director (22) and the side wall of the tank body (21) as well as the bottom of the tank body (21);
the central cylinder (23) is arranged in the center of the conical flow guider (22), and the central cylinder (23) is communicated with the sludge concentration chamber (27) so that sludge in the central cylinder (23) enters the sludge concentration chamber (27);
the water inlet pipe (24) is arranged at the bottom of the tank body (21), one end of the water inlet pipe (24) is connected with the bottom of the conical fluid director (22), and the other end of the water inlet pipe is connected with the tank type mixer (10);
the water outlet pipe (25) is arranged at the top of the tank body (21);
and one end of the sludge discharge pipe (26) is communicated with the sludge concentration chamber (27), and the other end of the sludge discharge pipe is connected to an external sludge pool.
9. The suspended sludge blanket treatment system for petrochemical oily sewage as claimed in claim 8, wherein the bottom of the conical fluid director (22) is provided with a straight cylinder part, the water inlet pipe (24) is connected with the straight cylinder part, and the water inlet pipe (24) is arranged along the tangential direction of the straight cylinder part, so that the sewage in the water inlet pipe (24) rises spirally after entering the conical fluid director (22).
10. The suspended sludge blanket treatment system for petrochemical oily sewage according to claim 7, wherein the number of the water pumps (30) is three and the number of the SSF sewage purifiers (20) is two.
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Application publication date: 20210528 |