CN215209043U - System is abolished in parcel of oily sludge is washed to supersound heat - Google Patents
System is abolished in parcel of oily sludge is washed to supersound heat Download PDFInfo
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- CN215209043U CN215209043U CN202120365747.2U CN202120365747U CN215209043U CN 215209043 U CN215209043 U CN 215209043U CN 202120365747 U CN202120365747 U CN 202120365747U CN 215209043 U CN215209043 U CN 215209043U
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Abstract
The utility model relates to a package breaking system for oily sludge is washed to supersound heat, including the retort, be equipped with heating device, ultrasonic wave generating device and agitating unit in the retort, heating device with ultrasonic wave generating device is located middle part in the retort, agitating unit is located lower part in the retort, the upper portion of retort is equipped with inlet tube and oil drain port, the bottom of retort is equipped with the discharge port, the discharge port passes through delivery union filter press, the top of retort is uncovered, perhaps the top of retort is sealed, is equipped with material import and adds the medicine mouth. The utility model discloses can utilize supersound and hot washing method under the effect of medicament, realize the getting rid of crude oil in the oily sludge, improve the treatment effeciency of oily sludge greatly, reduce treatment cost.
Description
Technical Field
The utility model relates to an oily sludge treatment equipment in oil field especially relates to the parcel that oily sludge was washed to supersound heat and breaks system.
Background
The oily sludge of the oil field is one of main pollutants generated in the processes of oil field development, oil product storage and transportation and refining processing, and has the characteristics of high oil content, high viscosity, fine particles, difficult dehydration and the like. According to statistics, the total amount of oily sludge generated in China every year reaches more than 500 ten thousand tons, and the yield of the oily sludge is continuously increased along with the deep exploitation of most oil fields. The oily sludge has extremely complex components, generally contains a large amount of aged crude oil, wax, asphaltene, colloid, solid suspended matters, bacteria, salts, acid gas, a small amount of heavy metal salts such as copper, zinc, chromium, mercury and the like, and also contains malodorous toxic substances such as benzene series, phenols, anthracene, pyrene and the like. If these components are not properly treated, direct discharge causes serious pollution to surrounding soil, water, vegetation, atmosphere, etc., and deteriorates the ecological environment. In addition, the oily sludge in the oil field also contains more petroleum substances, metals, inorganic mineral substances and the like, and has very important oil gas recycling value, so the oily sludge is a resource, and is wasted if directly discharged. Based on the needs of environment, society and economic coordinated development, oily sludge treatment becomes an urgent problem to be solved for various oil field enterprises, and since the early 70 s of the last century, a large number of researchers at home and abroad start to research the oily sludge treatment of oil fields, and a plurality of oily sludge treatment technologies and systems are developed successively.
The solvent extraction technology is based on the fact that solutes have different distribution capacities in two immiscible solvents, and a proper solvent is selected as an extracting agent by utilizing the principle of 'similarity and intermiscibility', so that crude oil is extracted from oily sludge. However, the technology has the disadvantages of large dosage of extractant, large equipment load, high energy consumption and high cost, and the separated sewage and waste residue need further treatment.
The chemical cleaning method is that hot water and chemical agent such as surfactant are added into oil-containing sludge in certain proportion, the nature of oil/liquid phase and oil/mud phase interface in the oil-containing sludge is changed by the actions of rolling, emulsifying, dissolving and solubilizing the chemical agent, crude oil is washed and stripped from the surface of the sand, and then the oil-containing sludge is separated into three phases of oil, water and sand by the processes of settling, cyclone and the like. The process has the main advantages that: the flow operation is simple and convenient, the reliability is strong, and the recovery rate of the oil is high; however, chemical cleaners have an adverse environmental impact and are highly specific and may not be as effective or completely ineffective when subject to change.
The pyrolysis technology is based on the thermal instability of organic matters in the oily sludge, heavy components in crude oil are converted into light components through thermal decomposition by using heat energy under the anaerobic condition, and then the light components are evaporated from the sludge in a gaseous form, so that the separation of the crude oil and the silt is realized. The gas produced in this process forms three phase materials after cooling: the gas phase is mainly methane and carbon dioxide; the liquid phase mainly comprises normal-temperature fuel oil and water; the solid phase is inorganic mineral and carbon residue. The technology has the main advantages that: the recovery rate of oil (hydrocarbon compounds) is high, the oily sludge is thoroughly treated, the oil content of the treated solid residue can reach 0.01 percent, the content of putrefactive organic matters in the residue is low, and the melting of ash slag can prevent metal substances from dissolving out, thereby reducing the secondary pollution to the environment; the disadvantages are that: large energy consumption of equipment, complex process and high investment.
SUMMERY OF THE UTILITY MODEL
For overcoming the above-mentioned defect of prior art, the utility model provides a parcel that oily sludge was washed to supersound heat breaks system, utilizes supersound and heat to wash the method under the effect of medicament, realizes getting rid of crude oil in the oily sludge, has improved oily sludge's treatment effeciency greatly, has reduced treatment cost.
The utility model discloses realize above-mentioned purpose's technical scheme is: the package breaking system for the oily sludge through ultrasonic hot washing comprises a reaction tank, wherein a heating device, an ultrasonic generating device and a stirring device are arranged in the reaction tank, the heating device and the ultrasonic generating device are located in the middle of the reaction tank, the stirring device is located in the lower portion of the reaction tank, a water inlet pipe and an oil outlet are arranged on the upper portion of the reaction tank, a discharge port is arranged at the bottom of the reaction tank, the discharge port is connected with a filter press through a discharge pipe, the top of the reaction tank is open, or the top of the reaction tank is closed, and a material inlet and a medicine adding port are formed in the top of the reaction tank.
The heating device can be an electric heater, the ultrasonic wave generating device can be an ultrasonic wave generator, the stirring device can be a stirring paddle, a paddle shaft extending out of the reaction tank is arranged, a motor connected with the outer end of the paddle shaft is arranged, and the motor is preferably a variable frequency motor.
The water inlet pipe, the oil drain port and the discharge port are generally arranged on the side wall of the reaction tank, the water inlet pipe is higher than the oil drain port, and the discharge port is lower than the stirring device. When the top of the reaction tank is closed, the top of the reaction tank is usually provided with a vent.
Preferably, an oil wiper is arranged at the upper part in the reaction tank, and the tail end of the oil wiper faces to and is close to the oil discharge port.
The oil wiper can be a horizontally arranged belt type oil wiper or a chain type oil wiper, and comprises an oil wiper driving wheel and an oil wiper driven wheel which are arranged in parallel at the same height, an oil wiper crawler belt or a chain is wound on the oil wiper driving wheel and the oil wiper driven wheel, an oil wiper plate which extends vertically and outwards can be arranged on the oil wiper crawler belt or the chain, the plate surface of the oil wiper plate is vertical to the axis of the oil discharge port, and the oil wiper is usually at the same height as or higher than the oil discharge port (the horizontal central line of the oil wiper is at the same height as or higher than the axis of the oil discharge port).
Preferably, one side of the oil wiper is close to the inner wall of the corresponding side of the reaction tank, when the cross section of the reaction tank is rectangular, the oil wiper and the reaction tank are in clearance fit, when the cross section of the reaction tank is circular, a necessary interval caused by the arc-shaped inner wall of the reaction tank is reserved between the oil wiper and the reaction tank (the interval can be plugged by a transverse plate fixed on the inner wall of the reaction tank, the transverse plate can be in sealing connection with the inner wall of the reaction tank, and can also be in clearance fit), the other side of the oil wiper can be provided with a vertical oil separation plate, and one end, facing the oil discharge port, of the oil separation plate is in sealing connection with the inner wall of the corresponding side of the reaction tank.
Preferably, the vertical projection of the oil scraper on the oil separation plate is smaller than the plate surface of the oil separation plate.
Preferably, the bottom in the reaction tank is provided with a slag scraping device, and the tail end of the slag scraping device faces to and is close to the discharge port.
The scraper can be for the chain slat type sediment machine of scraping of level setting, including the sediment machine of scraping that the height set up such as parallel scrapes the sediment machine action wheel and scrape the sediment machine from the driving wheel, scrape the sediment machine action wheel with scrape the sediment machine from around being equipped with the sediment machine chain, can be equipped with the perpendicular scraper that outwards stretches out on the sediment machine chain, the face of scraper with the direction of delivery of scraping the sediment machine chain is perpendicular, the chain slat type sediment machine of scraping is higher than usually the discharge port (indicate the bottom surface of the scraper of the motion of chain slat type sediment machine to below is a little higher than the axis of discharge port or with the axis of discharge port is equal height).
Preferably, the package breaking system for the ultrasonic hot washing of the oily sludge further comprises a material feeding device, wherein a discharge end of the material feeding device is located right above the reaction tank (when the top of the reaction tank is open) or connected with the material inlet (when the top of the reaction tank is closed and provided with the material inlet).
Material feed arrangement can be from the driving wheel including parallel arrangement's feed arrangement action wheel and feed arrangement, the feed arrangement action wheel with feed arrangement is around being equipped with the conveyer belt from the driving wheel, it is protruding to be equipped with perpendicular outside riser or the bar that stretches out on the conveyer belt, the face of riser or the bellied length direction of bar with the direction of transfer of conveyer belt is perpendicular, the riser or the bellied quantity of bar is a plurality of evenly distributed on the conveyer belt.
Preferably, the package breaking system for ultrasonically thermally washing the oily sludge further comprises a liquid dosing device, wherein a medicine outlet end of the liquid dosing device is positioned right above the reaction tank (when the top of the reaction tank is open) or connected with the medicine adding port (when the top of the reaction tank is closed and provided with the medicine adding port).
The liquid medicine adding device can comprise a plurality of medicine storage boxes, the bottom end of each medicine storage box is provided with a medicine outlet pipe, the medicine outlet end of each medicine outlet pipe is positioned right above the reaction tank or is respectively connected with the medicine adding port, each medicine outlet pipe is provided with a conveying pump, and a stirrer is arranged in each medicine storage box.
The utility model has the advantages that: the utility model discloses can utilize ultrasonic wave that ultrasonic wave generating device sent with follow the inlet tube to hot water that lets in the retort is right oily sludge in the retort carries out ultrasonic treatment and hot washing processing, improves the dispersibility of oily sludge and the mobility of crude oil, recycle to the medicament that adds in the retort realizes getting rid of crude oil in the oily sludge with the strong characteristic of affinity of crude oil in aquatic, can effectively improve the treatment effeciency of oily sludge, reduces treatment cost. In the process of treating the oily sludge, the separation speed of the sludge in the oily sludge and crude oil is accelerated by utilizing the cavitation and dispersion effects generated by ultrasonic waves, the oily sludge is uniformly dispersed, the contact area with a medicament is increased, and the reaction speed of the oily sludge and the medicament is accelerated. Partial hydroxyl free radicals can be generated in the ultrasonic treatment process, organic matters on the surface of the sludge can be oxidized, and the separation efficiency of crude oil and sludge is improved. The hot washing of the oily sludge improves the fluidity of the crude oil separated from the oily sludge, so that the crude oil and the medicament can be quickly combined to form larger oil droplets, thereby accelerating the separation speed of the crude oil and the sludge as well as the crude oil and the water.
Drawings
Fig. 1 is a schematic structural diagram of the ultrasonic hot washing oil-containing sludge parcel breaking system of the present invention;
fig. 2 is a front view of the mounting relationship of the oil wiper and the oil separation plate of the present invention;
fig. 3 is a plan view of the mounting relationship of the oil wiper and the oil separation plate according to the present invention;
FIG. 4 is a schematic structural view of the slag scraping device of the present invention;
fig. 5 is a schematic structural diagram of the material feeding device of the present invention;
FIG. 6 is a schematic structural view of the liquid medicine adding device of the present invention;
fig. 7 is a schematic structural diagram of the filter press according to the present invention.
Detailed Description
Referring to fig. 1-7, the utility model discloses a package breaking system for ultrasonic hot washing of oily sludge, which can rapidly and effectively separate sludge and crude oil (generally referring to various oil substances or components mainly derived from crude oil) in the oily sludge and collect the same respectively, comprising a reaction tank 1 as a container for containing the oily sludge, a medicament and water, wherein a heating device 2, an ultrasonic generating device 3 and a stirring device 4 are arranged in the reaction tank, the heating device and the ultrasonic generating device are arranged in the middle of the reaction tank, the stirring device is arranged at the lower part of the reaction tank, the heating device is used for heating the mixture, the ultrasonic generating device is used for introducing ultrasonic waves into reactants, the stirring device is used for stirring the mixture, the upper part of the reaction tank is provided with a water inlet pipe 5 and an oil outlet 6, the bottom of retort is equipped with discharge port 7, the inlet tube the oil drain port with the discharge port all is usually located on the lateral wall of retort, the inlet tube be used for to lead to water in the retort, the oil drain port is used for following the crude oil of separation in the discharge oil-containing mud in the retort, the discharge port is arranged in mud and the water of separation in the discharge oil-containing mud in the retort. The inlet tube is higher than the oil drain port avoids crude oil to flow into the inlet tube, the discharge port is less than agitating unit. The top of the reaction tank is open, or the top of the reaction tank is closed, and the reaction tank is provided with a material inlet and a dosing port and is used for feeding or introducing oily sludge, the medicament, the flocculating agent and acid or alkali for adjusting the pH value of the mixture into the reaction tank.
The heating device can be an electric heater, the ultrasonic wave generating device can be an ultrasonic wave generator, the stirring device can be a stirring paddle, the stirring paddle is provided with a paddle shaft extending out of the reaction tank and a motor connected with the outer end of the paddle shaft, and the motor is preferably a variable frequency motor.
When the top of the reaction tank is closed, the top of the reaction tank is usually provided with a vent for venting gases generated during the treatment of the contained sludge.
The upper part of the reaction tank is preferably provided with an oil scraper 8, the end of which is directed towards and close to the oil discharge (normally with a slight clearance from the oil discharge) for scraping off the crude oil floating on the upper layer of the mixture and pushing it towards the oil discharge. The oil wiper can be a horizontally arranged belt oil wiper or a chain oil wiper, and comprises an oil wiper driving wheel 81 and an oil wiper driven wheel 82 which are arranged in parallel at the same height, an oil wiper caterpillar band or chain 83 is wound on the oil wiper driving wheel and the oil wiper driven wheel, oil wiper plates which vertically extend outwards can be arranged on the oil wiper caterpillar band or chain, the plate surfaces of the oil wiper plates are vertical to the axis of the oil discharge port, the number of the oil wiper plates can be multiple, the oil wiper caterpillar band or chain is uniformly distributed, and the oil wiper driving wheel is usually provided with a driving motor which is positioned outside the reaction tank. The oil wiper is generally level with or above the oil drain port (meaning that the horizontal centerline of the oil wiper is level with or above the axis of the oil drain port) to facilitate pushing the scraped crude oil toward the oil drain port.
One side of the oil wiper is usually close to the corresponding side inner wall of the reaction tank, and when the cross section of the reaction tank is rectangular, the oil wiper and the reaction tank are in clearance fit, when the cross section of the reaction tank is circular, a necessary interval caused by the arc-shaped inner wall of the reaction tank is reserved between the reaction tank and the reaction tank (the interval can be blocked by a transverse plate fixed on the inner wall of the reaction tank, and the transverse plate can be in sealing connection with the inner wall of the reaction tank or can be in clearance fit with the inner wall of the reaction tank), the other side of the oil wiper can be provided with a vertical oil separation plate 9, one end of the oil separation plate facing the oil discharge port is hermetically connected with the inner wall of the corresponding side of the reaction tank, the vertical projection of the oil wiper on the oil separation plate is smaller than the plate surface of the oil separation plate, namely, the upper edge and the lower edge of the oil separation plate respectively extend to the upper part and the lower part of the oil wiper, and the front edge and the rear edge respectively extend to the front part and the rear part of the oil wiper. According to the arrangement, the oil separation plate and the inner wall of the reaction tank form an oil discharge channel, the oil wiper is located in the oil discharge channel, when the oil wiper scrapes crude oil floating on the upper layer of the mixture, the oil separation plate and the inner wall of the reaction tank can block the crude oil on two sides of the oil wiper, the crude oil is prevented from flowing to two sides of the oil wiper, and the crude oil flows to the direction of the oil discharge port along the oil discharge channel to the maximum extent and is discharged from the oil discharge port.
The bottom of the reaction tank is preferably provided with a slag scraping device 10, the end of which is directed towards and close to the discharge opening, for scraping sludge settled at the bottom of the reaction tank and pushing the sludge towards the discharge opening. The scraper can be for the chain plate type slag scraper of level setting, including the equal altitude slag scraper action wheel 101 of setting such as parallel with scrape the sediment machine from driving wheel 102, scrape the sediment machine action wheel with scrape the sediment machine from around being equipped with the sediment machine chain 103 from driving wheel, scrape and can be equipped with perpendicular outside scraper 104 that stretches out on the sediment machine chain, the face of scraper with the direction of transfer of scraping the sediment machine chain is perpendicular, the quantity of scraper is a plurality of usually evenly distributed on the sediment machine chain scraper, the sediment machine action wheel of scraping is equipped with usually and is located the outside driving motor of retort. The chain scraper is generally higher than the discharge port (that is, the bottom surface of the scraper moving to the lower part of the chain scraper is slightly higher than or equal to the axis of the discharge port), so that sludge in the scraper belt is pushed to the discharge port and is discharged from the discharge port.
The package breaking system for the oily sludge through ultrasonic hot washing can further comprise a material feeding device 11, which is used for feeding sludge and the medicament into the reaction tank, wherein the material feeding device can be a belt conveyor, the discharge end of the belt conveyor is positioned right above the reaction tank (when the top of the reaction tank is open) or is connected with the material inlet through a hopper positioned below the discharge end of the conveyor belt (when the top of the reaction tank is closed and provided with the material inlet). The belt conveyor can be including parallel arrangement's conveyer owner driving wheel 111 and conveyer from driving wheel 112, the conveyer owner driving wheel with the conveyer is around being equipped with conveyer belt 113 from the driving wheel, can be equipped with perpendicular outside riser or the protruding 114 of bar that stretches out on the conveyer belt, the face of riser or the bellied length direction of bar with the direction of delivery of conveyer belt is perpendicular, the riser or the bellied quantity of bar can be a plurality of evenly distributed on the conveyer belt. The riser or the bar arch is used for the in-process of conveyer belt conveying material drives the material and advances, avoids the material to be in the conveyer belt skids, influences the feeding of retort.
The package breaking system for the ultrasonic hot washing of the oily sludge can further comprise a liquid dosing device 12, which is used for introducing acid or alkali of a flocculating agent and a pH value of a regulating mixture into the reaction tank, wherein a medicine outlet end of the liquid dosing device is positioned right above the reaction tank (when the top of the reaction tank is open) or connected with the medicine adding port (when the top of the reaction tank is closed and provided with the medicine adding port).
The liquid medicine adding device preferably comprises a plurality of medicine boxes 121 for respectively containing the flocculating agent and the acid or alkali for adjusting the pH value of the mixture, the medicine boxes can be a plurality of respectively independent boxes, or can be formed by separating one box body through a plurality of vertical partition plates, the bottom end of each medicine box is provided with a medicine outlet pipe 122, the medicine outlet end of each medicine outlet pipe is positioned right above the reaction tank or is respectively connected with the medicine adding port (connected with one medicine inlet main pipe through a multi-way connecting piece or connected with the medicine inlet main pipe through a medicine inlet main pipe), each medicine outlet pipe is provided with a conveying pump 123 for providing conveying power, a stirrer 124 is arranged in each medicine box and used for stirring the flocculating agent, the acid or alkali solution and avoiding sedimentation, the stirrer can be a stirring paddle, and the stirring paddle is provided with a paddle shaft extending out of the medicine boxes, and is provided with a motor connected with the outer end of the paddle shaft.
The discharge port may be connected to a filter press 13 through a discharge pipe for filter-pressing dehydration of sludge, which may include a housing 131, which has a horizontal cylindrical shape, the top of one end of the device is provided with a feed inlet 132, the bottom of the other end is provided with a solid phase outlet 133, the feed inlet is connected with the discharge pipe, a liquid phase outlet 134 is arranged on the bottom wall of the middle part of the shell, a filtering screen 135 and an extrusion conveying mechanism are arranged in the shell, the longitudinal section of the filtering screen is preferably arc-shaped, and is matched with the radian of the inner wall of the shell, the filter screen is arranged on the bottom wall of the middle part in the shell and covers the liquid phase outlet, the extrusion conveying mechanism comprises a helical blade transmission shaft 136 and a helical blade 137 which is sleeved on the helical blade transmission shaft along the axial direction, the helical blade transmission shaft is coaxial with the shell, and the helical blade gradually increases from the feed inlet to the outer diameter of the solid phase outlet. The helical blade transmission shaft is provided with a driving motor (variable frequency motor), and the driving motor is positioned on the rear wall outside the shell.
Preferably, the outer edge of the propeller blade near the solid phase outlet end is spaced from the inner wall of the housing.
When the filter press works, sludge enters the shell from the feeding hole and continuously moves towards the solid phase outlet under the rotating action of the helical blade, the sludge is extruded by the helical blade and the inner wall of the shell in the moving process to realize solid-liquid separation, the separated solid phase is discharged from the solid phase outlet, and the separated liquid phase is filtered by the filter screen and then discharged from the liquid phase outlet.
The discharge pipe may be provided with a branch pipe for discharging water from the inside of the reaction tank after removing crude oil and sludge.
Valves can be arranged on each pipeline, the inlet and the outlet of the package breaking system for the ultrasonic hot washing of the oily sludge, and the control is convenient.
The method for treating the oily sludge by the ultrasonic hot washing oily sludge wrapping and removing system generally comprises the following steps:
1) hot washing and stirring: mixing the oily sludge, the medicament and water, and heating and stirring the mixture to uniformly mix the mixture;
2) ultrasonic treatment: introducing ultrasonic waves into the mixture to accelerate the separation of the sludge in the oily sludge from the crude oil coated on the oily sludge;
3) collecting crude oil: removing and collecting the crude oil in the upper layer of the mixture;
4) sludge dewatering: adding a flocculating agent into the muddy water mixture without the crude oil, standing for precipitation, and collecting precipitated sludge.
In the step 1), the step 2) and the step 3), the mixture is usually continuously stirred by the stirring device. In the step 2), ultrasonic waves are generally introduced into the mixture by the ultrasonic wave generating device.
The components of the medicament preferably comprise sodium silicate and sodium carbonate, and the mass ratio of the sodium silicate to the sodium carbonate is 4: 1. In step 1), the agent is preferably added to the oily sludge in an amount of 0.5 to 1.5g/kg, for example 0.5g/kg, 1.0g/kg or 1.5 g/kg. The solid content in the mixture of the oil-containing sludge, the agent and the water is preferably not more than 50%. The unique components and the proportion of the medicament and the mixing proportion of the medicament and the oily sludge and water enable the medicament and the crude oil separated from the oily sludge to be quickly combined to form oil droplets, so that the separation and removal of the crude oil are accelerated, and the treatment efficiency of the oily sludge is improved.
In the step 1), the temperature of the heated mixture is preferably 75 +/-2 ℃ so as to achieve the optimal hot washing effect and improve the fluidity of the crude oil separated from the oily sludge. The rotating speed of the stirring device is preferably 350-400 r/min, so that uniform mixing of the viscous mixture is conveniently realized, and the mixture is changed into a homogenate state.
In the step 1), hot water at 70-80 ℃ is preferably adopted to be mixed with the oily sludge and the medicament, so that on one hand, the dissolving effect of the medicament in water can be improved, the dispersion effect of the sludge and crude oil in the oily sludge in water can be promoted, on the other hand, the heating time of the mixture can be reduced, and the energy consumption of a heating link can be saved.
In the step 2), preferably, the mixture is subjected to ultrasonic treatment (ultrasonic waves are introduced into the mixture, the same is applied below) for 3-5 minutes to primarily separate sludge in the oily sludge from crude oil coated on the oily sludge, then acid or alkali is added into the mixture, the pH value of the mixture is adjusted to 6.5-7, the surface characteristics of sludge components exposed after the sludge is separated from the crude oil are changed, and even the mixture reacts with the medicament, so that the crude oil is agglomerated into large particles, the re-combination with the sludge is reduced, and the removal effect is influenced. And finally, regulating the rotating speed of the stirring device to 200-300 r/min, and continuing to perform ultrasonic treatment on the mixture for 30-40 min to accelerate the separation of the sludge in the oil-containing sludge and the crude oil coated on the sludge.
The ultrasonic frequency of the ultrasonic treatment is preferably 20-30 Hz, such as 20Hz, 25Hz or 30Hz, so as to achieve the best ultrasonic treatment effect, the ultrasonic frequency is too low to promote the separation of the sludge and the crude oil, and the ultrasonic frequency is too high to easily break away oil droplets formed under the action of the medicament, so that the separation and removal effect of the crude oil is affected.
The acid or base added to the mixture may be sulfuric acid or sodium hydroxide (solid or solution).
The flocculant is preferably polyaluminium chloride and/or PAM, and the addition amount of the flocculant in the mud-water mixture is preferably 400-600 mg/L, such as 400mg/L, 500mg/L or 600 mg/L. The flocculant and the amount thereof can enable sludge to be rapidly precipitated in a short standing time, and the flocculant is soluble in water, non-toxic and free of secondary pollution to the environment.
In the step 4), after the flocculant is added, the sludge-water mixture and the flocculant are uniformly mixed by stirring for 3min by the stirring device, then the stirring device is closed, standing and precipitating are carried out, and the collected precipitated sludge can be subjected to filter pressing and dehydration treatment according to treatment requirements.
The working process and the mode of the package breaking system for the ultrasonic hot washing of the oily sludge are as follows: adding oily sludge and the medicament into the reaction tank through the material feeding device, adding 70-80 ℃ hot water into the reaction tank through the water inlet pipe, starting the stirring device and the heating device, controlling the temperature of the mixture to be 75 +/-2 ℃, and controlling the rotating speed of the stirring device to be 350-400 r/min, so that the mixture is uniformly mixed and becomes a homogenate state. And starting the ultrasonic generating device, carrying out ultrasonic treatment on the mixture for 3-5 minutes, then adding acid and alkali into the reaction tank through the liquid medicine adding device, adjusting the pH value of the mixture to 6.5-7.0, adjusting the rotating speed of the stirring device to 200-300 r/min, and continuing the ultrasonic treatment for 30-40 minutes. Discharging the floating crude oil in the upper layer of the mixture through the oil discharge port by using the oil scraper. The stirring device continuously stirs, the flocculating agent is added into the reaction tank through the liquid dosing device, and after the stirring device stirs for 3 minutes, the stirring device is closed, and the mixture is stood for precipitation. And after standing and precipitating, starting the slag scraping device, discharging the precipitated sludge out of the reaction tank through the discharge port, dewatering the discharged sludge through the filter press and collecting the dewatered sludge, and after the precipitated sludge in the reaction tank is discharged, discharging the supernatant through the discharge port again.
Experimental example 1:
the oily sludge is oily sludge generated by a certain oil extraction plant in Daqing oil fields, and the specific medicament dosage and process parameters are controlled as follows: adding 1g/kg of the medicament in the oily sludge, adding hot water at 80 ℃, adjusting the stirring speed of a stirring device to 400r/min and the solid content to 40%, adjusting the pH value of the mixture to 6.8 by using sulfuric acid in the ultrasonic treatment stage, adjusting the stirring speed of the stirring device to 240r/min, continuing ultrasonic treatment for 30min, removing the upper crude oil, adding polyaluminium oxide into the muddy water mixture according to the amount of 500mg/L for flocculation precipitation, discharging the precipitated sludge out of the reaction tank, performing filter pressing dehydration, and discharging the sludge for 3 batches of oily sludge treatment, wherein the treatment effect is shown in Table 1.
TABLE 1 comparison table before and after treatment of oily sludge generated in a certain oil production plant in Daqing oilfield
| Processing a batch | Oil content of raw sludge (%) | Oil content (%) |
| 1 | 2.5 | 0.42 |
| 2 | 2.3 | 0.31 |
| 3 | 2.1 | 0.25 |
Experimental example 2:
the oily sludge is the oily sludge generated by a water treatment station of an oil production plant in Daqing oilfield, and the specific dosage of the medicament and the technological parameters are controlled as follows: adding 1.5g/kg of the medicament into the oily sludge, adding hot water at 80 ℃, adjusting the stirring speed of a stirring device to 350r/min and the solid content to 30 percent, adjusting the pH value of the mixture to 7.0 by using sulfuric acid in the ultrasonic treatment stage, adjusting the stirring speed of the stirring device to 200r/min, continuing ultrasonic treatment for 30min, removing the upper crude oil, adding PAM (polyacrylamide) into the mud-water mixture according to the amount of 400mg/L for flocculation and precipitation, discharging the precipitated sludge out of the reaction tank, performing filter pressing and dehydration, and performing 4 batches of oily sludge treatment, wherein the treatment effect is shown in Table 2.
Table 2 comparison table before and after treatment of oily sludge generated from water treatment station in a certain oil production plant in Daqing oil field
| Processing a batch | Oil content of raw sludge (%) | Oil content (%) |
| 1 | 3.2 | 0.19 |
| 2 | 3.6 | 0.21 |
| 3 | 3.5 | 0.20 |
| 4 | 3.8 | 0.25 |
Claims (10)
1. The package breaking system for the oily sludge through ultrasonic hot washing is characterized by comprising a reaction tank, wherein a heating device, an ultrasonic generating device and a stirring device are arranged in the reaction tank, the heating device and the ultrasonic generating device are located in the middle of the reaction tank, the stirring device is located at the lower part of the reaction tank, a water inlet pipe and an oil outlet are arranged on the upper part of the reaction tank, a discharge port is arranged at the bottom of the reaction tank, the discharge port is connected with a filter press through a discharge pipe, the top of the reaction tank is open, or the top of the reaction tank is closed, and a material inlet and a medicine adding port are formed in the top of the reaction tank.
2. The system for parcel destruction of oily sludge by ultrasonic thermal washing of claim 1, wherein an oil wiper is provided at an upper portion inside the reaction tank, the end of the oil wiper facing and being close to the oil discharge port.
3. The ultrasonic thermal washing oil-containing sludge coating and breaking system as claimed in claim 2, wherein one side of the oil wiper is close to and in clearance fit with the corresponding side inner wall of the reaction tank, and the other side is provided with a vertical oil baffle, and one end of the oil baffle facing the oil discharge port is in sealing connection with the corresponding side inner wall of the reaction tank.
4. The system for parcel destruction by ultrasonic thermal washing of oily sludge according to claim 3, wherein the vertical projection of said oil scraper on said oil-separating plate is smaller than the plate surface of said oil-separating plate.
5. The system for parcel breaking of oily sludge by ultrasonic thermal washing of claim 1 wherein the bottom of the reaction tank is provided with a slag scraping device, the end of the slag scraping device facing and being close to the discharge port.
6. The system according to claim 5, wherein the scraping device comprises a driving wheel and a driven wheel of the scraping device which are arranged in parallel and at the same height, a chain of the scraping device is wound on the driving wheel and the driven wheel of the scraping device, a scraping plate which extends perpendicularly outwards is arranged on the chain of the scraping device, and the surface of the scraping plate is perpendicular to the conveying direction of the chain of the scraping device.
7. The system for breaking packages in the oily sludge through ultrasonic hot washing of claim 1, further comprising a material feeding device, wherein a discharge end of the material feeding device is positioned right above the reaction tank or is connected with the material inlet.
8. The ultrasonic hot washing oily sludge package breaking system as claimed in claim 7, wherein the material feeding device comprises a feeding device driving wheel and a feeding device driven wheel which are arranged in parallel, a conveying belt is wound on the feeding device driving wheel and the feeding device driven wheel, a vertical plate or a strip-shaped bulge which extends outwards vertically is arranged on the conveying belt, the surface of the vertical plate or the length direction of the strip-shaped bulge is perpendicular to the conveying direction of the conveying belt, and the vertical plate or the strip-shaped bulges are distributed uniformly on the conveying belt.
9. The system for breaking packages in the ultrasonic hot washing of oily sludge according to claim 1, further comprising a liquid dosing device, wherein the medicine outlet end of the liquid dosing device is positioned right above the reaction tank or connected with the medicine feeding port.
10. The system for breaking packages in oily sludge through ultrasonic thermal washing according to claim 9, wherein the liquid medicine adding device comprises a plurality of medicine storage boxes, a medicine outlet pipe is arranged at the bottom end of each medicine storage box, the medicine outlet end of each medicine outlet pipe is positioned right above the reaction tank or is respectively connected with the medicine adding port, a conveying pump is arranged on each medicine outlet pipe, and a stirrer is arranged in each medicine storage box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365747.2U CN215209043U (en) | 2021-02-08 | 2021-02-08 | System is abolished in parcel of oily sludge is washed to supersound heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365747.2U CN215209043U (en) | 2021-02-08 | 2021-02-08 | System is abolished in parcel of oily sludge is washed to supersound heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215209043U true CN215209043U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120365747.2U Active CN215209043U (en) | 2021-02-08 | 2021-02-08 | System is abolished in parcel of oily sludge is washed to supersound heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215209043U (en) |
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2021
- 2021-02-08 CN CN202120365747.2U patent/CN215209043U/en active Active
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