CN113582394B - Pretreatment method and device for oil-containing wastewater of ship - Google Patents
Pretreatment method and device for oil-containing wastewater of ship Download PDFInfo
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- CN113582394B CN113582394B CN202110914495.9A CN202110914495A CN113582394B CN 113582394 B CN113582394 B CN 113582394B CN 202110914495 A CN202110914495 A CN 202110914495A CN 113582394 B CN113582394 B CN 113582394B
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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
- C02F1/40—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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
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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
Abstract
The invention belongs to the field of wastewater treatment, and discloses a ship oily wastewater pretreatment method, which comprises the steps of firstly, obtaining sample wastewater, standing for preset sedimentation time, dividing the preset sedimentation time into a plurality of continuous preset sedimentation stage durations, taking the total sedimentation time of the sample wastewater, a floating slag layer thickness value, a water layer thickness value to be treated and a sediment layer thickness value as single-time layering modeling data, and obtaining the single-time layering modeling data at intervals of a stage measurement interval duration with the preset sedimentation stage duration; then repeating the above process for a preset number of times, and performing data fitting on all the obtained single layered modeling data to obtain a layered data model; and finally, respectively determining the thicknesses of the floating slag layer and the water layer to be treated of the oily wastewater according to the total sedimentation time of the oily wastewater and the layering data model, removing the floating slag layer, and discharging the water layer to be treated. The invention also discloses a ship oily wastewater precipitation and discharge device matched with the method.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a pretreatment method and device for oil-containing wastewater of ships.
Background
The ship wastewater is wastewater which is used for cleaning related equipment in a ship in a designated period or is discharged by the ship after operation assistance or maintenance assistance process, and the cleaning or assistance water uses nearby seawater, so that when the wastewater is pretreated, the seawater, the grease, the solid scum and the sediment are required to be separated, and then the separated seawater is independently obtained for subsequent treatment.
At present, the prior art generally puts the ship wastewater into an oil separation sedimentation tank for standing and sedimentation, and then discharges the seawater layer formed after sedimentation to the subsequent step.
The problems with this approach are: because the output of each time of ship wastewater differs greatly, the capacity of the oil separation sedimentation tank has capacity limitation because of environmental limitation, when the capacity of the oil separation sedimentation tank is insufficient to accommodate the ship wastewater, the sedimentation time of the ship wastewater in the oil separation sedimentation tank is necessarily changed, the ship wastewater is discharged to the subsequent process, namely the space is replaced by time, and the thickness of the sea water, grease, solid scum and sediment layering formed by the ship wastewater is changed along with the sedimentation time, so that each time of sedimentation time is different, the layering composition formed is also different, and therefore, related staff are difficult to determine the accurate layering composition, and the discharged sea water often contains a large amount of solid scum, thereby influencing the further treatment of the subsequent sea water and being extremely easy to cause loss to the subsequent equipment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the pretreatment method and the pretreatment device for the oil-containing wastewater of the ship, which can greatly reduce the solid scum in the discharged seawater by matching with the pretreatment method and the pretreatment device for the oil-containing wastewater of the ship, thereby greatly reducing the treatment cost of the subsequent seawater and greatly reducing the loss of the subsequent equipment.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the pretreatment method of the ship oily wastewater comprises the following steps:
step S1: acquiring a predetermined volume of oily wastewater as sample wastewater;
step S2: standing and precipitating sample wastewater for a preset precipitation time, wherein the sample wastewater forms a floating slag layer, a water layer to be treated and a sediment layer which are distributed from top to bottom in the preset precipitation time, and the thickness of the floating slag layer, the water layer to be treated and the sediment layer is changed along with the change of the precipitation time of the sample wastewater;
step S3: dividing the preset sedimentation time into a plurality of continuous preset sedimentation stage durations, taking the total sedimentation time of the sample wastewater, the corresponding thickness value of the floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sedimentation layer as single-time layering modeling data, and taking the stage measurement interval duration corresponding to each preset sedimentation stage duration as an interval to acquire the single-time layering modeling data, wherein the total sedimentation time is the duration from the preset sedimentation time to the acquisition of the current data;
step S4: repeating the steps S1-S3 for a preset number of times, and performing data fitting on all the obtained single layered modeling data through preset data analysis software to obtain a layered data model based on the total sedimentation time, the thickness value of the floating slag layer, the thickness value of the water layer to be processed and the thickness value of the sedimentation layer of the sample wastewater;
step S5: and respectively determining the thicknesses of the floating slag layer and the water layer to be treated of the oily wastewater according to the total precipitation time of the oily wastewater and the layering data model, removing the floating slag layer, and discharging the water layer to be treated.
Preferably, the duration of all the predetermined precipitation phases is the same, the duration of all the phase measurement intervals corresponding to the same predetermined precipitation phase duration is the same, and the phase measurement intervals corresponding to different predetermined precipitation phase durations are different.
Further, the predetermined settling time is 12 hours, the predetermined settling period duration includes a first period duration, a second period duration, and a third period duration that are consecutive in order, and the first period duration, the second period duration, and the third period duration are all 4 hours.
Still further, the phase measurement interval durations corresponding to the first phase duration, the second phase duration and the third phase duration are respectively used as the first phase measurement interval duration, the second phase measurement interval duration and the third phase measurement interval duration, the first phase measurement interval duration is 0.5 hour, the first phase measurement interval duration is 1 hour, and the first phase measurement interval duration is 2 hours.
Preferably, the predetermined number of times is 14 and the predetermined data analysis software is Origin.
Preferably, the sample wastewater is obtained through a measuring cylinder with a measuring range of 1 liter, and the thickness value of the floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sediment layer of the sample wastewater are directly read through the reading of the surface of the measuring cylinder.
Preferably, the oily wastewater is subjected to standing precipitation in a preset oil separation sedimentation tank and is discharged through a immersed pump, wherein the immersed pump is movably arranged in the vertical direction and is positioned in the oil separation sedimentation tank corresponding to the bottom of a water layer to be treated of the oily wastewater.
The ship oily wastewater precipitation and discharge device matched with the ship oily wastewater pretreatment method is characterized by comprising an oil separation sedimentation tank for accommodating and precipitating oily wastewater; the oil scraping machine is arranged right above the oil separation sedimentation tank and is movably arranged along the vertical direction and used for removing a scum layer of oil-containing wastewater; the submersible sewage pump is arranged at the bottom of the oil separation sedimentation tank and is used for discharging a sediment layer of the oily wastewater; the immersed pump is movably arranged in the oil separation sedimentation tank along the vertical direction; and the regulating tank is communicated with the oil separation sedimentation tank through the immersed pump and is used for introducing a water layer to be treated of the oil-containing wastewater from the oil separation sedimentation tank and performing post-treatment.
Preferably, the invention also comprises an oil film monitor and a floating oil collector, wherein the regulating tank comprises an oil removal neutralization tank, the oil removal neutralization tank is used for removing oil from the oil-containing wastewater of the water layer to be treated, which is introduced from the oil separation sedimentation tank, and is used as the wastewater to be removed, the oil film monitor is arranged on the liquid level of the wastewater to be removed in a floating manner, and the oil film monitor is used for monitoring the residual oil foam on the surface of the wastewater to be removed; the floating oil collector floats on the liquid surface of the wastewater to be deoiled, and is used for collecting residual oil foam on the surface of the wastewater to be deoiled.
Further, the invention also comprises a PH measuring instrument and a medicament delivery container, wherein the PH measuring instrument is arranged on the liquid level of the wastewater to be deoiled in a floating way and is used for measuring the PH value of the wastewater to be deoiled in real time; the chemical delivery container is communicated with the deoiling neutralization tank and is used for delivering a preset chemical into the wastewater to be deoiled, so that the PH value of the wastewater to be deoiled is within a preset range.
Compared with the prior art, the invention has the beneficial effects that:
1. because the ship oily wastewater pretreatment method of the invention divides the preset sedimentation time into a plurality of continuous preset sedimentation stage durations, takes the total sedimentation time of sample wastewater, the corresponding thickness value of the floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sedimentation layer as single layering modeling data, and takes the stage measurement interval duration corresponding to each preset sedimentation stage duration as an interval to acquire the single layering modeling data; repeating the above process for a preset number of times, and performing data fitting on all the obtained single layered modeling data through preset data analysis software to obtain a layered data model; and finally, respectively determining the thicknesses of the scum layer and the water layer to be treated of the oily wastewater according to the total sedimentation time of the oily wastewater and the layered data model, removing the scum layer and discharging the water layer to be treated, so that the layered data model is built based on the data containing the information of different layered thicknesses of a plurality of sample wastewater obtained in preset times, and the thicknesses of the scum layer and the water layer to be treated in the oily wastewater can be accurately determined according to the total sedimentation time according to the layered data model, so that the discharged water to be treated basically does not contain solid scum, further, the treatment cost of the subsequent seawater is greatly reduced, and the loss of subsequent equipment is greatly reduced.
2. Because the time intervals of all the phase measurement intervals corresponding to the same preset sedimentation phase time length are the same, the phase measurement intervals corresponding to different preset sedimentation phase time lengths are different, the arrangement is based on that the formation rate of sedimentation layering of the oily wastewater is not consistent all the time, the rate inflection point of the formation trend of the sedimentation layering has relative rules in phase time, and the overall distribution of a plurality of phase time is irregular, therefore, the setting of the sedimentation phase time length and the phase measurement interval time length ensures that the sedimentation layering rule of the sample wastewater is more attached to the sedimentation layering rule of the oily wastewater, and a layering data model formed by observing and sampling in the period is more accurate.
3. Because the ship oily wastewater precipitation and discharge device comprises an oil separation sedimentation tank, a water tank and a water tank, wherein the oil separation sedimentation tank is used for accommodating and precipitating oily wastewater; the oil scraping machine is arranged right above the oil separation sedimentation tank and is movably arranged along the vertical direction and used for removing a scum layer of oil-containing wastewater; the submersible sewage pump is arranged at the bottom of the oil separation sedimentation tank and is used for discharging a sediment layer of the oily wastewater; the immersed pump is movably arranged in the oil separation sedimentation tank along the vertical direction; the regulating tank is communicated with the oil separation sedimentation tank through the immersed pump and is used for introducing a water layer to be treated of the oil-containing wastewater from the oil separation sedimentation tank and performing subsequent treatment, so that the ship oil-containing wastewater sedimentation and discharge device can be matched with a ship oil-containing wastewater pretreatment method better.
4. Because the invention also comprises an oil film monitor and a floating oil collector, the oil film monitor is used for monitoring residual oil foam on the surface of the wastewater to be deoiled; the floating oil collector floats on the liquid surface of the wastewater to be deoiled, and is used for collecting residual oil foam on the surface of the wastewater to be deoiled, so that the invention can also recover the residual oil foam on the surface of the wastewater to be treated, thereby facilitating the centralized recovery treatment of the residual oil foam and further reducing the oil foam content of the oily wastewater.
5. Because the invention also comprises a PH measuring instrument and a medicament delivery container, the PH measuring instrument is used for measuring the PH value of the wastewater to be deoiled in real time; the chemical adding container is used for adding a preset chemical into the wastewater to be deoiled, so that the PH value of the wastewater to be deoiled is within a preset range, and therefore, the wastewater to be treated does not cause corrosion damage to the following related contact equipment due to the fact that the acidity or alkalinity of water quality exceeds the standard.
Drawings
FIG. 1 is a schematic step diagram of a pretreatment method of marine oily wastewater according to an embodiment of the present invention; and
fig. 2 is a plan view showing a sediment removal device for oily wastewater of a ship according to an embodiment of the present invention.
In the figure: s100, a ship oily wastewater pretreatment method, wherein an oily wastewater sedimentation and discharge device comprises 1, an oil separation sedimentation tank, 2, an oil scraping machine, 3, a submersible sewage pump, 4, a submersible pump, 5, a regulating tank, 51, a deoiling neutralization tank, 52, a homogenizing tank, 521, a homogenizing sub tank, 52a, a tank partition wall, 52b, a communication port, 6, a submersible stirrer, 7, a water conveying pump, 8, an oil film monitor, 9, a floating oil collector, 10, a PH measuring instrument, 11 and a medicament throwing container.
Detailed Description
In order to make the technical means, creation characteristics, achievement of the purposes and effects of the present invention easy to understand, the following examples specifically describe a pretreatment method and device for oil-containing wastewater of a ship according to the present invention with reference to the accompanying drawings, and it should be noted that the descriptions of these embodiments are for aiding understanding of the present invention, but are not limited thereto.
As shown in fig. 1, a pretreatment method S100 for ship oily wastewater in this embodiment includes the following steps:
step S1: a predetermined volume of oily wastewater is obtained as sample wastewater.
Specifically, the sample wastewater is obtained by a measuring cylinder with a measuring range of 1 liter, and the surface of the measuring cylinder is provided with scale marks.
Step S2: and standing the sample wastewater for a preset precipitation time, wherein the sample wastewater forms a floating slag layer, a water layer to be treated and a sediment layer which are distributed from top to bottom in the preset precipitation time, and the thickness of the floating slag layer, the water layer to be treated and the sediment layer is changed along with the change of the precipitation time of the sample wastewater.
Specifically, the predetermined sedimentation time is 12 hours, and based on the general definition in the field, the definition of a sediment layer, a water layer to be treated and a sediment layer formed by sedimentation is determined according to the content of suspended matters in the water body, wherein when the suspended matters account for 70% to 100%, and the part of the water body is positioned on the upper layer of the total water body, the part of the water body is taken as the sediment layer; when the ratio of suspended matters is less than 5%, the part of water body is used as a water layer to be treated, a transition layer is arranged between the floating slag layer and the water layer to be treated, and further precipitation is needed, so that the suspended matters are not treated in the current pretreatment process, and the suspended matters are measured by taking points in sequence along the vertical mode of the measuring cylinder.
Step S3: dividing the preset sedimentation time into a plurality of continuous preset sedimentation stage durations, taking the total sedimentation time of the sample wastewater, the corresponding thickness value of the floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sedimentation layer as single-time layering modeling data, and taking the stage measurement interval duration corresponding to each preset sedimentation stage duration as an interval to acquire the single-time layering modeling data, wherein the total sedimentation time is the duration from the preset sedimentation time to the acquisition of the current data.
Specifically, the thickness value of the floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sediment layer of the sample wastewater are directly read through the readings of the surface of the measuring cylinder, all the preset sedimentation stage durations are the same, all the stage measurement interval durations corresponding to the same preset sedimentation stage duration are the same, the stage measurement intervals corresponding to different preset sedimentation stage durations are different, the preset sedimentation stage durations comprise a first stage duration, a second stage duration and a third stage duration which are sequentially continuous, the first stage duration, the second stage duration and the third stage duration are all 4 hours, the stage measurement interval durations corresponding to the first stage duration, the second stage duration and the third stage duration are respectively used as a first stage measurement interval duration, a second stage measurement interval duration and a third stage measurement interval duration, the first stage measurement interval duration is 0.5 hour, the first stage measurement interval duration is 1 hour, the first stage measurement interval duration is 2 hours, and 13 related data are measured within one preset sedimentation time.
Step S4: repeating the steps S1-S3 for a preset number of times, and performing data fitting on all the obtained single layered modeling data through preset data analysis software to obtain a layered data model based on the total sedimentation time, the floating slag layer thickness value, the water layer thickness value to be processed and the sediment layer thickness value of the sample wastewater.
Specifically, the predetermined number of times is 14, the predetermined data analysis software is Origin, and the thickness of each layer in the oily wastewater after any standing precipitation can be obtained as long as the layer data model is input from the time point of starting standing, and in this embodiment, the above-mentioned 13 measurements of the relevant data are performed every day for 14 days, namely, 14 times.
Step S5: and respectively determining the thicknesses of the floating slag layer and the water layer to be treated of the oily wastewater according to the total precipitation time of the oily wastewater and the layering data model, removing the floating slag layer, and discharging the water layer to be treated.
Specifically, oily wastewater is subjected to standing precipitation in a preset oil separation sedimentation tank and is discharged through a immersed pump, wherein the immersed pump is movably arranged in the vertical direction and is positioned in the oil separation sedimentation tank corresponding to the bottom of a water layer to be treated of the oily wastewater.
As shown in fig. 2, the device 100 for precipitating and discharging oily wastewater of a ship, which is matched with the method S100 for pretreating oily wastewater of the ship, comprises an oil separation sedimentation tank 1, an oil scraping machine 2, a submersible pump 3, a submersible pump 4, an adjusting tank 5, a submersible stirrer 6, a water delivery pump 7, an oil film monitor 8, a floating oil collector 9, a PH measuring instrument 10 and a medicament delivery container 11.
The oil separation sedimentation tank 1 is used for holding and depositing oily wastewater, the oil scraper 2 is located directly over the oil separation sedimentation tank, and the oil scraper 2 is movably arranged along the vertical direction, be used for getting rid of the scum layer of oily wastewater, the submersible pump 3 is arranged at the bottom of the oil separation sedimentation tank 1, be used for discharging the heavy siltation layer of oily wastewater, the submersible pump 3 is movably arranged in the oil separation sedimentation tank along the vertical direction, when the water layer to be treated of oily wastewater needs to be discharged from the oil separation sedimentation tank 1, the thickness of scum layer and the water layer to be treated and the height range of the water layer to be treated in the oily wastewater are obtained according to the total sedimentation time of the oily wastewater, then the oil scraper 2 is adjusted to stretch into the oily wastewater and enable the oil scraper 2 to scrape off the scum layer containing wastewater, and the submersible pump 3 is adjusted to the vicinity of the bottom of the water layer to be treated, in this embodiment, the scum layer is scraped off and transferred to the outside, the submersible pump 3 is placed in a concentrated manner, the sludge layer is transferred to the outside, and the sludge is concentrated by the concentrated motor is moved, or the concentrated can be moved by the manual sludge is concentrated by the mobile device.
The regulating tank 5 is communicated with the oil separation sedimentation tank 1 through the immersed pump 4, and the regulating tank 5 is used for introducing a water layer to be treated of the oil-containing wastewater from the oil separation sedimentation tank 1 and carrying out post-treatment.
The conditioning tank 5 includes a deoiling neutralization tank 51 and a homogenizing tank 52.
The oil removal neutralization tank 51 is used for removing oily wastewater of a water layer to be treated, which is introduced from the oil removal sedimentation tank 1, and is used as the wastewater to be removed, the oil film monitor 8 floats on the liquid surface of the wastewater to be removed, the oil film monitor 8 is used for monitoring residual oil foam on the surface of the wastewater to be removed, the oil film collector 9 floats on the liquid surface of the wastewater to be removed, the oil film collector 9 is used for collecting the residual oil foam on the surface of the wastewater to be removed, in the embodiment, the model of the oil film monitor 8 is an ODL-1600A water oil film instrument, the oil film collector 9 is dragged on the surface of the wastewater to be removed by an operator, the oil film collector 9 is provided with a floating ball and an oil suction cylinder, a suction port of the oil suction cylinder faces the liquid surface of the wastewater to be treated, a vacuum pump capable of being opened and closed remotely is arranged inside the oil suction cylinder, the oil collector 9 floats on the liquid surface by the floating ball, the position of the residual oil foam is monitored to be present by the oil film monitor 8, the vacuum pump is opened remotely by the operator, and the residual oil foam is collected by the operator, and the residual oil foam is carried by the operator to the outside of the oil collector to be placed in the concentrated tank.
The PH measuring instrument 10 is arranged on the liquid surface of the wastewater to be deoiled in a floating manner, and is used for measuring the PH value of the wastewater to be deoiled in real time, the chemical feeding container 11 is communicated with the deoiling neutralization tank 51, and is used for feeding a predetermined chemical into the wastewater to be deoiled, so that the PH value of the wastewater to be deoiled is within a predetermined range, specifically, two chemical feeding containers 11 respectively accommodate an acidic chemical and an alkaline chemical, and in the embodiment, the bottom of the deoiling neutralization tank 51 is also provided with a submersible stirrer 6.
The homogenizing tank 52 is communicated with the deoiling and neutralizing tank 51 through a water feed pump 7 for introducing wastewater to be treated after deoiling and pH adjustment in the deoiling and neutralizing tank 51 as wastewater to be homogenized, and a submersible stirrer 6 is provided at the bottom of each homogenizing sub-tank 521.
In the present embodiment, the homogenizing tank 52 is partitioned into three equal proton tanks 521 of the same size by two-sided tank partition walls 52a, one equal proton tank 521 is communicated with the degreasing neutralization tank 51, and each of the tank partition walls 52a is provided with a plurality of communication ports 52b, so that the three homogenizing sub tanks 521 are communicated with each other.
The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications or variations which may be made by those skilled in the art without the inventive effort within the scope of the appended claims remain within the scope of this patent.
Claims (7)
1. The pretreatment method of the oil-containing wastewater of the ship is characterized by comprising the following steps of:
step S1: acquiring a predetermined volume of oily wastewater as sample wastewater;
step S2: standing the sample wastewater for a preset precipitation time, wherein the sample wastewater forms a floating slag layer, a water layer to be treated and a sediment layer which are distributed from top to bottom in the preset precipitation time, and the thickness of the floating slag layer, the water layer to be treated and the sediment layer is changed along with the change of the precipitation time of the sample wastewater;
step S3: dividing the preset sedimentation time into a plurality of continuous preset sedimentation stage durations, taking the total sedimentation time of the sample wastewater, the thickness value of the corresponding floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sedimentation layer as single layering modeling data, and taking the stage measurement interval duration corresponding to each preset sedimentation stage duration as an interval to acquire the single layering modeling data, wherein the total sedimentation time is the duration from the preset sedimentation time to the acquisition of current data;
step S4: repeating the steps S1-S3 for a preset number of times, and performing data fitting on all the obtained single layered modeling data through preset data analysis software to obtain a layered data model based on the total sedimentation time, the floating slag layer thickness value, the water layer thickness value to be processed and the sediment layer thickness value of the sample wastewater;
step S5: respectively determining thicknesses of a floating slag layer and a water layer to be treated of the oily wastewater according to the total precipitation time of the oily wastewater and the layering data model, removing the floating slag layer, and discharging the water layer to be treated;
wherein, the duration of all the predetermined sedimentation phases is the same, the duration of all the phase measurement intervals corresponding to the same duration of the predetermined sedimentation phase is the same, and the phase measurement intervals corresponding to different durations of the predetermined sedimentation phases are different;
the preset sedimentation time is 12 hours, the preset sedimentation stage duration comprises a first stage duration, a second stage duration and a third stage duration which are sequentially continuous, and the first stage duration, the second stage duration and the third stage duration are all 4 hours;
the phase measurement interval duration corresponding to the first phase duration, the second phase duration and the third phase duration are respectively used as a first phase measurement interval duration, a second phase measurement interval duration and a third phase measurement interval duration, wherein the first phase measurement interval duration is 0.5 hour, the second phase measurement interval duration is 1 hour, and the third phase measurement interval duration is 2 hours.
2. The pretreatment method for oil-containing wastewater of a ship according to claim 1, wherein: wherein the predetermined number of times is 14, and the predetermined data analysis software is Origin.
3. The pretreatment method for oil-containing wastewater of a ship according to claim 1, wherein: the sample wastewater is obtained through a measuring cylinder with a measuring range of 1 liter, and the thickness value of the floating slag layer, the thickness value of the water layer to be treated and the thickness value of the sediment layer of the sample wastewater are directly read through the reading of the surface of the measuring cylinder.
4. The pretreatment method for oil-containing wastewater of a ship according to claim 1, wherein: the oil-containing wastewater is subjected to standing precipitation in a preset oil-separating sedimentation tank and is discharged through a immersed pump, and the immersed pump is movably arranged in the vertical direction and is positioned in the oil-separating sedimentation tank corresponding to the bottom of a water layer to be treated of the oil-containing wastewater.
5. A ship oily wastewater sediment removal device cooperating with the ship oily wastewater pretreatment method of any one of claims 1 to 4, comprising:
an oil separation sedimentation tank for accommodating and precipitating the oily wastewater;
the oil scraping machine is arranged right above the oil separation sedimentation tank and is movably arranged along the vertical direction and used for removing a scum layer of the oil-containing wastewater;
the submersible sewage pump is arranged at the bottom of the oil separation sedimentation tank and is used for discharging a sediment layer of the oily wastewater;
the immersed pump is movably arranged in the oil separation sedimentation tank along the vertical direction; and
the regulating tank is communicated with the oil separation sedimentation tank through the immersed pump and is used for introducing a water layer to be treated of the oil-containing wastewater from the oil separation sedimentation tank and performing subsequent treatment.
6. The marine oily wastewater precipitation and removal device of claim 5, further comprising:
an oil film monitor and a floating oil collector,
said conditioning tank comprising a deoiling neutralization tank which extracts said oily wastewater of the water layer to be treated from said oil separation sedimentation tank and serves as wastewater to be deoiled,
the oil film monitor floats on the liquid level of the wastewater to be deoiled, and is used for monitoring residual oil foam on the surface of the wastewater to be deoiled;
the floating oil collector is arranged on the liquid level of the wastewater to be deoiled in a floating mode and is used for collecting residual oil foam on the surface of the wastewater to be deoiled.
7. The marine oil wastewater sediment removal assembly of claim 6, further comprising:
a pH measuring instrument and a medicament delivery container,
the pH measuring instrument is arranged on the liquid level of the wastewater to be deoiled in a floating way and is used for measuring the pH value of the wastewater to be deoiled in real time;
the chemical delivery container is communicated with the deoiling neutralization tank and is used for delivering a preset chemical into the wastewater to be deoiled, so that the pH value of the wastewater to be deoiled is within a preset range.
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| CA3058876A1 (en) * | 2018-10-16 | 2020-04-16 | C. Michael Miller | Voltage-controlled, hydrodynamically isolated, ion-generation apparatus and method |
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| CA2218029A1 (en) * | 1997-10-10 | 1999-04-10 | John Nenniger | Method and apparatus for measuring deposits in pipelines |
| CA2572449A1 (en) * | 2004-07-01 | 2006-01-19 | Exxonmobil Upstream Research Company | Hydrodynamics-based gridding geologic modeling (hydro-gridding) |
| CN102156817A (en) * | 2011-04-11 | 2011-08-17 | 国家海洋信息中心 | Rapid prediction method for drifting path and diffusion of marine spilled oil |
| FR2996038A1 (en) * | 2012-09-26 | 2014-03-28 | IFP Energies Nouvelles | Method for exploiting sedimentary basin crossed by well for petroleum exploration, involves generating heat flow map of basin by interpolation of heat flow at base of basin for each geological time, and exploiting basin by heat flow maps |
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