CN111646595A - Oil field extraction water treatment simulation experiment device - Google Patents

Abstract

The invention relates to an oilfield produced water treatment simulation experiment device, which comprises a raw water preparation device, a natural sedimentation device, a coagulation sedimentation device, a boosting buffer device, a filtering backwashing device, a dispensing device, a dirty oil recovery device, a sludge and sewage treatment device, a remote control displacement device, an alarm device and a console, wherein the natural sedimentation device is used for simulating an actual natural sedimentation effect, the secondary coagulation sedimentation effect is realized through a dosing link, and the quantity of added medicaments is controlled in real time by adjusting parameters of the injected amount, so that more accurate control is realized; the boosting buffer device enables the mixed liquid with unstable pressure and flow velocity flowing from the upstream to be stabilized in a range, and the filtering and backwashing device further separates the oily sewage. The invention simulates the oil-containing sewage treatment system extracted from the oil field, and adjusts the inflow, pressure and settling time to reach the water quality standard of reinjection water or outward discharge water.

Description

Oil field extraction water treatment simulation experiment device

Technical Field

The invention relates to an experimental device for researching oilfield produced water treatment, in particular to an oilfield produced water treatment simulation experimental device.

Background

In an oil field produced by water injection, most of the water injected into the oil layer from the water injection well is returned to the surface together with the crude oil through the oil production well, and this water must be removed before the crude oil is transported out and transported out, and the removed sewage contains crude oil, and is called oil field produced water. With the increase of the exploitation age of the oil field, the water content of the produced water liquid continuously rises, some blocks reach more than 90%, and the oil-containing sewage becomes the main water injection source of the oil field. With the continuous development of low-permeability oil fields and reservoir reservoirs outside the surface at the periphery of the oil field, the requirements on the water quality of water injected into the oil field are stricter. Oilfield wastewater mainly comprises crude oil dehydration water (also known as oilfield produced water), well drilling wastewater and other types of oily wastewater in a station. The treatment of oil field sewage can be carried out in various ways according to factors such as oil field production, environment and the like. When the oil field needs to be injected with water, the oil field sewage is treated and then injected back into the stratum, and multiple indexes such as suspended matters, oil and the like in the water are strictly controlled to prevent the oil field sewage from damaging the stratum. The domestic oil field is very big every day the water injection volume, and the oily sewage that needs to be handled is also very big correspondingly, and the power consumption is also very serious, needs to carry out the emulation optimization to oil field sewage treatment system in order to energy saving and the more effective management and control sewage treatment's process, carries out the dispatch of every link through sampling analysis, but actual oil field sewage treatment system is bigger, and the structure is complicated, and the regulation and control of every link is also difficult, consequently utilizes actual sewage treatment process equipment to carry out the experiment very difficult. On the other hand, the optimization analysis of the oily sewage treatment system is imperative, so that a set of oilfield produced water treatment simulation experiment device is established, and the actual sewage treatment system is analyzed by optimizing and improving the simulation sewage treatment experiment device, so that the method is a feasible method.

Disclosure of Invention

The invention aims to provide an oilfield produced water treatment simulation experiment device which is used for solving the problem that modeling and establishing an optimization scheme are very difficult when an actual sewage treatment process device is used for carrying out experiments.

The technical scheme adopted by the invention for solving the technical problems is as follows: the oilfield produced water treatment simulation experiment device comprises a raw water preparation device, a natural sedimentation device, a coagulation sedimentation device, a boosting buffer device, a filtering backwashing device, a dispensing device, a dirty oil recovery device, a sludge sewage treatment device, an automatic cleaning device, a remote control displacement device, an alarm device and a control console, wherein the natural sedimentation device comprises a natural sedimentation tank, a water inlet and distribution structure, a water collection structure, an oil collection structure, a water drainage structure and a sludge treatment structure are arranged in the natural sedimentation tank, the water inlet and distribution structure comprises a water inlet part and a water distribution part, an electric control valve is arranged at a water inlet of the water inlet part, the flow rate and the flow control of inlet water are realized, and a flow meter and a pressure meter are arranged around the electric control valve; the water distribution part is provided with a plurality of water distribution ports, each water distribution port is provided with an electric control valve, each water distribution port is provided with a filter head, the filter head is connected with an automatic assembling and disassembling device, the automatic assembling and disassembling device is used for transferring the filter head which is fully covered with dirt to a cleaning area for cleaning, then the filter head is returned to the water distribution port for re-installation, and the flow of the water distribution part is controlled in real time on a console system interface according to data transmitted by a flow velocity sensor and a pressure sensor; the water distribution part is provided with an automatic frequency conversion stirring device, and the stirring frequency of the stirring device is changed according to the change of the water inlet speed and the signal of the pressure sensor, so that the oily sewage is fully mixed before sedimentation; a sludge collecting port is formed at the bottom of the settling tank and is connected with a negative pressure suction system; a side wall washing and scraping device is arranged above the natural settling tank and is connected with the automatic lifting assembly, and the side wall washing and scraping device is conveyed to the bottom of the natural settling tank by the automatic lifting assembly to be washed; a throttling speed-regulating electric control valve is arranged on the water outlet pipeline; an air floatation device is arranged below the natural settling tank and arranged on a supporting frame structure, pulleys are arranged on two side edges of the supporting frame structure, the pulleys are in contact with rails, and the rails are arranged on two sides close to the tank wall; the oil collecting structure is an oil collecting tank, a circle of oil outlet weir is arranged near an oil layer of the oil collecting tank, the oil outlet weir is triangular, a circle of thin plate is arranged on the inner wall of the oil outlet weir, the thin plate is arranged on a slideway, a circle of heating coil is arranged at the bottom of the oil collecting tank, and the bottom surface of the oil collecting tank is provided with a slope; the natural settling tank is provided with 4 sampling ports from top to bottom, each sampling port is provided with a sampling device, the position where oil and water are contacted is provided with one sampling port, the lower deeper part is provided with one sampling port, the middle part of the natural settling tank is provided with one sampling port downwards, finally, a solid-liquid interphase part is provided with one sampling port, the outlet of each sampling port is provided with a stop valve, the other end of the stop valve is connected with a hose, and the hose is connected with a sampling container;

the coagulation sedimentation device is provided with an inclined plate structure more than a natural sedimentation device, the inclined plate structure is formed by combining a plurality of plastic corrugated plates, the plastic corrugated plates are horn-shaped, the plurality of plastic corrugated plates are alternately combined layer by layer from inside to outside, a fixedly connected structure is arranged between every two adjacent plastic corrugated plates, the inclined plate is arranged on a supporting structure, and the upper part of the inclined plate is provided with a hanging ring;

the boosting buffer device comprises a cylinder, an alarm device and a filter screen, wherein the filter screen is detachably arranged at the bottom of the boosting buffer device, a sewage discharge outlet is arranged below the filter screen, the boosting buffer device enables mixed liquid with unstable upstream pressure and unstable upstream flow velocity to be stabilized in a range, a pressure sensor and a flow sensor are arranged at a position half meter away from an inlet of the cylinder, the right end of the cylinder is an outlet, the outlet is connected with a water outlet pipeline, the boosting device is arranged at a position where the water outlet pipeline and the outlet are alternated, and the flow sensor and the pressure sensor are also arranged at the outlet; a rectangular sealing opening is formed in the side wall, close to the filter screen, of the barrel, and the filter screen is cleaned and replaced and is moved out of the barrel through the cleaning sealing opening; determining the retention time of the mixed liquid in the buffer device according to the data transmitted by the pressure sensor and the flow sensor, and if the pressure and the flow are overlarge, generating an alarm by the alarm device;

the filtering and backwashing device comprises a filtering tank, a water inlet and distribution device, a filter head screen structure, a filter material layer, a backing layer, a water collecting mechanism, a layered frequency division stirring and pressurizing flushing device, a sludge dirt collecting structure, a backwashing loop structure and a pressure alarm, wherein the filter material layer is replaced and cleaned; the layered frequency division stirring and pressurizing flushing device is characterized in that each layer of the filter material layer is correspondingly provided with a stirring paddle, the size, the number and the inclination angle of each layer of the stirring paddles are different, the stirring paddles are provided with pipe diameter devices with small holes, and clean clear water passes through the small holes at a certain pressure and then is sprayed into the filter material when the stirring paddles rotate, so that the filter material is further cleaned; the sludge and dirt collecting structure is arranged at the bottom of the filtering tank, the bottom of the filtering tank is in an ellipsoidal shape, the bottom of the filtering tank is provided with a pit, the bottom of the pit is provided with a valve mechanism which can be automatically opened and closed according to pressure, the scrubbing head is arranged close to the ellipsoidal surface, the scrubbing head cleans the ellipsoidal surface according to a set spiral track, after the bottom is reached, dirt on the scrubbing head falls into the pit based on the action of gravity, and after the weight of sediment reaches a set pressure value, the valve mechanism is automatically opened.

The control cabinet passes through internet access cell-phone APP among the above-mentioned scheme, realizes further automation, can be in long-range just can monitor entire system's function, and the user can conveniently know entire system's operational aspect through this mobile client, still provides alarm system in this APP moreover, and when the abnormal conditions appeared in the entire system device, the system can upload the mobile client with abnormal conditions, and timely warning customer has emergency situation to handle.

In the scheme, the dispensing device is provided with a plurality of idle areas for placing medicines through partition plates, each idle area is in a cuboid shape, two ends of each idle area are provided with holes, one end of each idle area is provided with an automatic adjusting valve, the other end of each idle area is connected with a pipeline with a pump, the automatic adjusting valves are connected with a control circuit, and a control console controls the addition of a certain medicine through corresponding automatic adjusting valves; the upper and lower positions of each partition plate are provided with liquid level sensors for monitoring the liquid level, when the liquid level is higher than the highest position or lower than the lowest position, the liquid level sensors can send signals to an alarm system to inform a control console of taking emergency measures, when the liquid level is too high, an automatic regulating valve is closed to stop supplement of the medicine storage, when the liquid level is displayed too low, the rotation speed of a pump can be increased, and required medicines can be added into the medicine storage in time.

Sludge sewage treatment plant adopts the big iron box of open cuboid among the above-mentioned scheme, and the bottom designs into the shape of funnel, and the centre separates with the baffle and forms sludge impoundment and effluent water sump, and the toper bottom is connected with the pipeline, and the toper bottom is connected with the valve that has pressure sensor through the flange with the pipeline.

In the scheme, the dirty oil recovery device is a dirty oil recovery tank, the tank body is divided into three layers, each layer is provided with a filter screen with different mesh sizes, so that a part of impurities are screened off in the process of downward sedimentation of dirty oil, the oil outlet also comprises one filter screen, a pressure sensor and an alarm device are installed near each filter screen, and when the pressure of a certain part of filter screens is increased due to excessive impurities on the certain part of filter screens, the alarm device reminds the replacement and cleaning of the filter screens at the part of filter screens; the inner wall of the tank body is provided with a spiral heating pipeline from top to bottom, the top is a hot water inlet, the bottom is a hot water outlet, and due to the change of the environment, the oil in the tank flows slowly sometimes and cannot meet the treatment requirement of equipment, and at the moment, the viscosity of dirty oil can be reduced by improving the temperature of the oil, so that the fluidity of the oil is improved. A large amount of oil stains can be accumulated when the dirty oil recovery device is used for a long time, and a heating pipeline and a filter screen in the device can be lifted to the outside through a lifting ring to be cleaned and replaced.

The device is scraped to lateral wall utilizes automatic frequency conversion agitating unit's axis of rotation among the above-mentioned scheme, the axis of rotation passes through separating mechanism, drive mechanism connects the device is scraped to the lateral wall washing, utilize separating mechanism, when wasing, the axis of rotation passes through drive mechanism and the device is scraped to the lateral wall washing and connects, it adjusts to wash intensity through the inverter pump, signal control through the control cabinet adjusts the speed size of inverter pump, thereby make the process of washing more nimble, in order to make the more thorough that jar wall washed, set up the mobile device of oscilaltion at the transfer shaft.

The sludge and dirt collecting structure comprises a washing head and a spiral track, the washing head is telescopic and can rotate, the cross section of the spiral track is rectangular, the washing head comprises a brush and a washing head box, a small motor and a washing controller which can control forward and reverse rotation are arranged in the washing head box, two walking wheels are arranged on the side edge of the washing head box, the washing head box is provided with a track hole, the spiral track penetrates through the track hole, the washing head box is in sliding connection with the spiral track, and the starting end and the tail end of the spiral track are provided with position sensors.

In the scheme, the water distribution pipe of the water inlet and distribution device slowly rotates around the middle shaft at a constant speed, so that water distribution is more uniform.

The filter material layer of the filtering backwashing device in the scheme is divided into three parts, the grain size is gradually increased from top to bottom, the filter material on the uppermost layer is fine sand with fine grain size, the filter material on the middle layer is coarse sand with fine grain size, the filter material on the lowermost layer is gravel with larger grain size, and the lining layer is arranged below the gravel and supports the filter material layer.

In the scheme, the layered frequency division stirring pressurizing flushing device is provided with 8 paddles on the three layers, the paddle on the uppermost layer is provided with 6 paddles, the paddle on the second layer in the middle is provided with 4 paddles, and the frequency division stirring pressurizing flushing device is provided with three layers of stirring paddles.

The invention has the following beneficial effects:

1. the invention can simulate the oily sewage with different components and different temperatures, the fluid conditions under different speeds and different pressures, the length of time and the speed required by natural sedimentation under different conditions, the selection of the pressure intensity during filtration, the proportion of the medicine selection and the medicine adding amount and the like, tests are carried out by adjusting the frequency of the water pump and the intensity of the pressure adjusting device so as to change the speed and the pressure intensity of water flow, and the opening degree of a valve at a corresponding position is changed by a console so as to change the size of flow and other measures so as to obtain experimental data, obtain the optimal flow rate, pressure, time, medicine proportion, medicine adding intensity and other parameters, thereby achieving the optimal sewage treatment effect and maximally saving energy.

2. The actual oil field sewage treatment system has a complex structure and a large occupied area, and has great difficulty in controlling and detecting the whole system, so that the actual sewage treatment process equipment is utilized to carry out experiments, and modeling and an optimization scheme are very difficult to formulate. So far, no existing theoretical method is seen at home and abroad, and the solution cannot be realized by classical mathematics and an optimization method. The invention is a novel simulation device capable of realizing automation and cloud service. The method is suitable for observation, sampling analysis, data acquisition and system optimization analysis in a laboratory, and is a feasible method for analyzing the actual sewage treatment system by optimizing and improving the simulated sewage treatment experimental device.

3. The invention considers the problem that parameters such as the speed and the pressure of fluid in each link, such as a sedimentation link, a boosting buffer link, a filtering and backwashing link and the like, and the liquid retention time of each device are difficult to control in the actual oilfield produced water treatment. The water inlet and the water outlet of each link are provided with flow and pressure sensors, data collected by the sensors can be conveniently controlled at corresponding positions, an electric control valve is adopted in the system, the general sensors are provided with required range parameters, and once the data are abnormal, the electric control valve can receive a control signal from a console to perform the next operation.

4. The invention designs an automatic variable frequency stirring device and a layered stirring device, and adjusts the corresponding speed and the corresponding force of the stirring device aiming at the liquid under different conditions, so that the oil-containing liquid can be fully and uniformly settled and condensed in the most reasonable structure.

5. The invention realizes the functions of automatic control and remote monitoring, adopts a wireless transmission system based on smaller overall volume of the equipment and based on local area network technology, uploads the parameters of each link to be controlled to the console and the mobile phone APP, and can monitor the whole system in real time through the mobile phone client when the working personnel are not on site.

Drawings

FIG. 1a is an overall assembly view of the present invention.

Figure 1b is a perspective view of the present invention.

Fig. 2a is an assembly diagram of the internal structure of the natural settling device of the present invention.

Fig. 2b is a perspective view of an assembly view of the internal structure of the natural settling device of the present invention.

Fig. 3 is a schematic view showing the structure of the water inlet pipe in the water inlet part of the present invention.

Fig. 4 is a schematic structural view of the central water collecting pipe of the water inlet part of the present invention.

Fig. 5 is a schematic view showing the structure of a water distribution pipe in the water distribution part of the present invention.

Fig. 6 is a schematic structural diagram of a water outlet pipe in the water outlet part of the invention.

Fig. 7 is a schematic view of the sump structure of the present invention.

Fig. 8 is a schematic view of the heating coil structure at the bottom of the oil collecting tank.

Fig. 9 is a schematic structural diagram of the sampling device of the present invention.

FIG. 10 is a schematic view of the inclined plate structure of the coagulation sedimentation device of the present invention.

Fig. 11 is a schematic view of a support structure in the coagulation sedimentation device of the present invention.

FIG. 12 is a schematic view of the construction of the sidewall scraping apparatus of the present invention.

FIG. 13 is a schematic view of a sludge-sewage collection structure according to the present invention.

FIG. 14 is a schematic view of a structure of a washing brush head in the sludge-sewage collecting structure of the present invention.

Figure 15 is a spiral track diagram of a brush head of the present invention.

FIG. 16 is a schematic structural diagram of the automatic frequency conversion stirring device of the present invention.

Fig. 17 is a schematic view of the structure of the roller of the remote displacement device of the present invention.

Fig. 18 is a schematic structural view of the lifting device capable of automatically lifting.

FIG. 19 is a schematic view of an air floating device according to the present invention.

FIG. 20 is a schematic view of an installation and fixation structure of the air floating device of the present invention.

Fig. 21 is a schematic view of the structure of the pulley track in the support frame structure of the present invention.

Fig. 22 is a schematic structural view of the lifting device for lifting equipment according to the present invention.

Fig. 23 is a schematic structural view of the boost buffer device of the present invention.

FIG. 24 is a schematic view of the construction of the filtration and backwashing apparatus of the present invention.

FIG. 25 is a schematic diagram of the sieve tube structure in the water distribution system of the filtering and backwashing device of the invention.

FIG. 26 is a schematic diagram of the filter head switching structure of the filtration and backwashing device of the present invention.

FIG. 27 is a schematic structural view of a layered frequency division stirring and pressurizing flushing device in a filtration and backwashing device according to the present invention.

FIG. 28 is a schematic view of the screen configuration of the filtration backwash assembly of the present invention.

Fig. 29 is a schematic diagram of water distribution structure of backwash water in the filtration and backwashing apparatus according to the present invention.

FIG. 30 is a schematic view of the bottom support structure of the filtration backwash assembly of the present invention.

FIG. 31 is a schematic view of the hinge structure of the support assembly of the filter backwash assembly of the present invention.

Fig. 32 is a schematic view of an i-steel structure in the support frame structure of the present invention.

FIG. 33 is a schematic view of the dispensing device of the present invention.

FIG. 34 is a schematic view showing the construction of a dirty oil recovery apparatus according to the present invention.

Fig. 35 is a schematic structural view of a space spiral heating coil in the dirty oil recovery device according to the present invention.

FIG. 36 is a schematic view of the structure of a sludge sewage treatment apparatus according to the present invention.

FIG. 37 is a schematic diagram of the console of the present invention.

In the figure: the device comprises a natural settling device 1, a coagulation settling device 2, a water inlet pipe 3, a central water collecting pipe 4, a water distribution pipe 5, a water outlet pipe 6, an oil collecting tank 7, a heating coil 8, a sampling device 9, an inclined plate structure 10, a supporting structure 11, a side wall scraping device 12, a scrubbing head box 13, a scrubbing head 14, a spiral track 15, an automatic frequency conversion stirring device 16, a roller 17, a lifting device 18, an air floating device 19, an air floating device 20, a mounting and fixing structure 21, a pulley 22, a lifting device 23, a pressure boosting buffer device 23, a filtering and back flushing device 24, a filter head screen mesh structure 25, a filter head conversion structure 26, a frequency division stirring and pressurizing flushing device 27 layers, a filter screen 28, a water collecting mechanism 29, a backing layer 30, a dispensing device 33, a dirty oil recovery device 34, a spiral heating line 35, a sludge and sewage treatment device 36, a control console 37, traveling wheels 38, a position.

Detailed Description

The invention is further described with reference to the accompanying drawings in which:

referring to fig. 1-37, the oilfield produced water treatment simulation experiment device comprises a raw water preparation device, a natural sedimentation device 1, a coagulation sedimentation device 2, a pressure boosting buffer device 23, a filtering and backwashing device 24, a dispensing device 33, a dirty oil recovery device 34, a sludge and sewage treatment device 36, an automatic cleaning device, a remote control displacement device, an alarm device and a control console 37. The invention simulates the oil-containing sewage treatment system extracted from the oil field, and adjusts the inflow, pressure and settling time to reach the water quality standard of reinjection water or outward drainage water. The two-stage sedimentation device (natural sedimentation device 1 and coagulation sedimentation device 2) carries out sedimentation, physical sedimentation separation during actual sewage treatment is simulated, collection of sump oil and coagulation sedimentation after dosing treatment are carried out, and the two-stage sedimentation device is used for measuring and displaying a flow direction measuring device of a water flow direction and a sensor for measuring the water flow velocity and pressure. The primary settling tank is also called as a physical settling link and is used for simulating natural settling during actual oily sewage treatment, and the natural settling device 1 (the primary settling device) comprises a water inlet pipe 3, a water distribution system, a water collection system, a central water collection pipe 4, a central water collection cylinder, a water outlet pipe 6, an oil collection device, a sludge discharge structure, an air flotation system, an automatic cleaning tank wall and a tank bottom system and further comprises a moving and fixing structure. The coagulation sedimentation device 2 (secondary sedimentation device) is similar to the natural sedimentation device 1, and also comprises a water inlet pipe 3, a water distribution system, a water collection system, a central water collection pipe 4, a central water collection cylinder, a water outlet pipe 6, an oil collection device and a sludge treatment structure, and an inclined plate structure 10 for increasing the sewage sedimentation effect. The boosting buffer device 23 mainly makes the pressure of the water flow throttled from the previous ring unstable, and then the water flow is in a stable state after being processed by the buffer device, and then flows into the next link after further boosting. The filtering step is to further separate the oily sewage and mainly comprises a water distribution system, a filter material layer, a drainage system and a back washing structural design.

The raw water preparation device mainly provides a water source for the whole simulation experiment system device, and the water distribution device can meet media required by experiments in order to simulate the physical composition of actual oilfield produced water. The energy power system provides pressure required by water flow for the whole device, so that raw water can be transported in the whole system at a certain speed.

The settling system mainly comprises two parts, namely natural settling and coagulation settling. The primary settling device is also called natural settling, and the oily sewage is separated after a certain time due to different densities of various substances (mainly oil and water) under the action of gravity. This once subsides automatically controlled valve that device set up in water inlet portion carries out the control to the velocity of flow and flow of intaking as required and experimental effect analysis, and automatically controlled valve installs in water inlet department of water inlet portion to install the flowmeter and the pressure gauge of display screen around it. The water distribution part has eight water outlets in total, each water distribution port is provided with an electric control valve, the state of each valve port can be changed by controlling the signal change of the electric control valve based on the change of actual conditions, eight water distribution ports are in total, each water distribution port has two working modes of opening and closing, so that sixteen states exist in total, each water distribution port is provided with a filter head capable of being automatically replaced, a spare filter head is automatically replaced according to the scaling condition of a filter screen on each filter head, the filter head fully covered with dirt is transferred to a cleaning area through an automatic loading and unloading device and then is returned to be reinstalled to the original position, the flow of the water distribution part can be timely controlled at the interface of the control console 37 according to the data returned by the flow rate sensor and the pressure sensor, when the flow is overlarge, the valves of a plurality of water distribution ports can be controlled to be closed, and conversely, when the flow pressure is small, a plurality of valves can be opened; have one can automatic frequency conversion agitating unit 16 in water distribution system below, according to the difference of the circumstances of coming water, can its stirring frequency of automatically regulated, dynamics and direction, also can remove in vertical direction moreover, just so can shift out the stirring rake very conveniently and then wash. The bottom of the sedimentation tank is provided with an opening for collecting sludge, a hose is connected to the opening, the other end of the sedimentation tank is connected to a negative pressure suction system which has the function similar to a dust collector and can suck out the sludge and other dirt, then the bottom of the sedimentation tank is further cleaned, the sludge and other dirt pass through a side wall washing and scraping device 12 above the whole device, the side wall washing and scraping device reaches the bottom of the sedimentation tank through an automatic lifting assembly and then starts to be washed, and the washed dirt can be also treated by the negative pressure suction system; the water outlet pipeline is provided with a throttling and speed-regulating electric control valve, the valve carries out corresponding regulation according to the downstream processing condition, if the following links are not processed in time, the downstream can transmit an alarm signal to the downstream, then the control system can respond in time after receiving the alarm signal, the control system temporarily closes the switch of the output valve, and after the downstream processing is finished, the control system opens the valve at the downstream and then continues normal work. There is a row of air supporting device 19 in natural settling tank's below arrangement, and air supporting device 19 passes through air supporting device installation fixed knot and constructs 20 installation, and figure 20 is air supporting device installation fixed knot and constructs, and air supporting device 19 is according to inflow and intensity size, and air supporting device 19 can adjust the volume, size and the frequency that produce the bubble and produce to the settlement treatment effect of adaptation sewage makes liquid and solid can separate fully. The braced frame structure is used for placing air supporting device 19, and the underport air supporting equipment is traded and washed, and there is pulley gear two sides of braced frame structure, and pulley 21 contacts with the track, and the track is installed in the both sides that are close to jar wall, and when air supporting device 19 need regularly wash or maintain, braced frame structure can rely on the track and then drags air supporting device 19 to move to the natural settling cask outside together (natural settling cask wall sets up the air supporting device opening), then carries out corresponding processing. The oil collecting device adopts an oil collecting tank 7, the oil collecting tank 7 is made of channel steel, an oil outlet weir is arranged near the oil layer, the oil outlet weir is triangular, a circle of thin plate is arranged on the inner wall of the triangular weir, the thin plate is arranged on the slideway and can be automatically adjusted according to the thickness of an oil layer, a circle of heating system which can be heated to different temperatures along with the change of the external temperature is designed below the oil collecting tank 7, the physical structure adopted by the heating system is a spatial spiral pipe type heating coil 8, sometimes the oil layer flows slowly, in order to facilitate the oil layer to be timely discharged to the oil collecting system, the principle of increasing the temperature and reducing the viscosity of the oil layer is utilized to ensure that the oil layer can more smoothly flow into the oil collecting system, in addition, the bottom surface of the oil collecting groove 7 near the oil outlet is designed with a slope, which is more beneficial to the inflow and outflow of oil and reduces the oil accumulation. The side wall scraping and washing device 12 utilizes the same central rotating shaft, the rotating shaft and the rotating shaft of the automatic frequency conversion stirring device 16 are the same rotating shaft, the rotating shaft passes through the separating mechanism, the transmission mechanism is connected with the side wall scraping and washing device, the separating mechanism can connect or separate the rotating shaft and the transmission mechanism, the transmission mechanism is connected with the side wall scraping and washing device, the separating mechanism is utilized, when the washing is needed, the gear and the side wall scraping and washing device are connected, the washing intensity can be adjusted through the frequency conversion pump, the speed of the pump can be adjusted through the signal control of the control console 37, so that the washing process is more flexible, in order to enable the tank wall washing to be more thorough, the lifting device 22 capable of lifting up and down is added at the position of the central shaft. Sampling device 9, in order to learn the experiment effect, there is some data to need the inside mixed liquid of collection system, natural settling cask has set up 4 sample connection according to the difference of height altogether, every sample connection sets up a sampling device 9, a sample connection has been opened to the position department that the profit contacted, a sample connection has been opened to deep department down next to, set up a sample connection at subsiding the middle part again, a sample connection is seted up to alternate department at solid-liquid at last, just so can take a sample respectively according to the position of difference, then carry out relevant experiment again, the stop valve has been installed in every sample connection exit, valve one end is connected with the sample connection, the other end is connected with the hose, the hose is connected with the container that finally adorns the sampling liquid, when needs are sampled, open corresponding valve.

The coagulation sedimentation device 2 is provided with an inclined plate structure 10, the inclined plate structure 10 is formed by combining a plurality of plastic corrugated plates, the corrugation has the effects of increasing the contact area with sewage on one hand and being more beneficial to sludge sedimentation on the other hand, the inclined plate is designed by adopting a shallow pool principle, raw water is divided into a plurality of layers, the contact area between the sewage and the inclined plate is increased, and the sedimentation of oily sewage is more beneficial, the final form of the inclined plate structure is a plurality of annular structures, the upward radius of an opening is large, the downward radius of the opening is small, the inclined plate structure is simply formed by alternately combining a plurality of horn-shaped plastic plates, a fixed connection structure is arranged between each corrugated plate and each corrugated plate, so that the inclined plate structure 10 is not easy to deform, a supporting structure 11 is arranged below the inclined plate and used for supporting the whole inclined plate structure 10, the upper part of the inclined plate is provided with a lifting ring, when the, the lifting hook can be conveniently taken out of the tank from the upper part of the tank, so that the tank can be cleaned and replaced.

The medicine inlet is connected with the water inlet, in order to mix the medicine from the medicine storage 33 with the oily sewage, the part is provided with a flowmeter for observing the amount of the medicine, the manometer is used for observing whether the pressure of the injected medicine can meet the pressure of the medicine entering the water inlet, the electric control throttle valve is combined with the flowmeter and the signal of the manometer, the parameters of the measuring devices are used for controlling the opening and closing of the valve and the opening of the valve, the medicine storage 33 contains three medicines in total, the opening of the valve is controlled by the control system according to different condition requirements, different proportions are adopted according to different simulated raw water component conditions, and the medicine is finally prepared into the required proportion. The coagulation sedimentation device 2 also needs an air flotation device 19, and the components in the mixed liquid are more complex and the viscosity is increased due to the effect of introducing the medicine into the mixed liquid, so that the adoption of the air flotation device is beneficial to sedimentation separation in the coagulation process. The automatic variable frequency stirring device 16 is also added in the coagulation sedimentation device 2, so that the medicine can be quickly and uniformly mixed with the oily sewage, eight stirring paddles are provided, three types of stirring paddles are designed according to the difference of raw water and medicine components, the difference of the three types lies in the difference of rotating angles and the difference of blade areas, due to the difference, the action scenes of the three types are different, and the stirring paddles suitable for corresponding conditions are selected according to the stirring speed and the strength. The stirring paddle 16 is installed on a central rotating shaft, the central rotating shaft is positioned in the central position of the coagulation sedimentation tank, the upper end of the stirring paddle is connected with a motor with a control system through a coupler, the motor is installed on the upper portion of the coagulation sedimentation tank, a steel frame structure for supporting is arranged below the motor, and the motor and a knob of the steel frame structure are connected together through four nuts.

The boosting buffer device 23 comprises a pressure gauge, a flowmeter, an alarm device, a filter screen (bottom, can be moved out for cleaning and replacement at regular time), and can stabilize the mixed liquid with unstable pressure and flow velocity flowing from the upstream in a range, a pressure and flow sensor is installed at a position half meter away from the inlet, the retention time of the mixed liquid in the buffer device is determined according to the data returned by the sensor, the filter screen 28 is arranged at the bottom of the device, an opening is formed downwards, the opening is used for discharging sludge and impurities, the right end is a water outlet, the water outlet is connected with a water outlet pipeline, a boosting device is installed at the position between the water outlet pipeline and the outlet, and then the boosting device is the same as the water inlet and is provided with. A rectangular seal is provided in the wall of the cushioning device immediately to the right of the screen 28, and the screen 28 can be cleaned and replaced by washing the seal out of the device. An alarm device is associated with the sensor that generates an alarm if the pressure and flow are excessive.

The filtering and backwashing device 24 mainly comprises a water inlet and distribution structure 29, a filter head screen structure 25, a filter material layer, a backing layer 30, a water collecting mechanism 29, a layered frequency division stirring and pressurizing washing device 27, a sludge dirt collecting region structure, a backwashing loop structure and a pressure alarm, wherein the filter material layer is replaced and cleaned. The water passing through the boosting buffer device 23 enters the filter tank through the water inlet and distribution pipeline of the filter head screen structure 25 and is sprayed to the upper layer of the filter material at a certain pressure, the water distribution pipe 5 can slowly rotate around the central axis at a uniform speed, so that the water distribution is more uniform, the filter head conversion structure 26 refers to fig. 26, and the filter screen 28 refers to fig. 28. The filter material layer is divided into three parts, the grain size is larger from top to bottom, firstly fine sand with fine grain size, then coarse sand with fine grain size or other filter materials, then gravel with larger grain size is arranged downwards, a supporting structure (a backing layer 30) which is positioned at the bottom is conveniently arranged below the gravel and supports the filter materials above, a water collecting mechanism 29 is also a water distribution structure during backwashing and consists of a plurality of pipes with openings, during normal work, filtered water can be discharged out of the filter tank through the water collecting mechanism, and during backwashing, backwashing water passes through the water collecting pipe and is sprayed upwards through the small holes under certain pressure to complete backwashing. The layered frequency division stirring and pressurizing flushing device 27 is characterized in that each layer of the filter material layer is correspondingly provided with a stirring paddle, the stirring paddles on each layer are different according to the condition of each layer of the filter material, the size, the number and the inclination angle of the stirring paddles on each layer are different, the number of the stirring paddles on the first layer is 8, the number of the stirring paddles on the second layer is 6, and the number of the stirring paddles on the third layer is 4, because of long-time filtering, each layer of the filter material is adhered with a lot of dirt, the adsorption effect of the filter material on impurities in mixed liquid is reduced, in order to enable the surface of the filter material to be cleaner and improve the filtering effect, the layered frequency division stirring and pressurizing flushing device 27 enables each layer of the filter material to be fully turned over and cleaned, most of the filter material can participate in the filtering process, the waste is reduced, a pipe diameter device with small holes is additionally arranged on the layered frequency division stirring and pressurizing flushing device, so that the filter material is further cleaned. The bottom of structure is being filtered to mud dirt collection, the bottom is an ellipsoid shape, brush head 14 has been designed on this face, can clean the dirt of deposit on the face, set for a period of time, after this period of time, brush head 14 scrapes facial clear according to spiral track 15 that has set for, wait to reach the bottom after, the dirt on brush head 14 falls into the pit of design in the bottom before this based on the effect of gravity, the pit bottom is seted up porosely, installed a valve mechanism who carries out automatic opening and shutting according to pressure on the basis in the hole, after the deposit weight reaches the pressure value of settlement, the valve is opened by oneself. The alarm device is set according to the pressure inside the filter device, the pressure sensor is arranged inside the device, when the internal pressure is too high, the pressure sensor can transmit the data to the alarm system, the alarm system is reminded by red alarm, and at the moment, related personnel are required to operate.

Referring to fig. 13, 14 and 15, the sludge and dirt collecting structure includes a brush head 14 and a spiral track 15, the brush head is retractable and rotatable, the cross section of the spiral track is rectangular, the brush head includes a brush and a brush head box 13, a small motor and a controller which can control forward and reverse rotation are arranged in the brush head box, two traveling wheels 38 are arranged on the side of the brush head box, a track hole 40 is arranged on the brush head box, the spiral track passes through the track hole, the brush head box can slide along the spiral track, and a position sensor is arranged at the starting end and the tail end of the spiral track. In the working process, the washing brush head 14 drives the travelling wheels through a small motor, deeper grooves are formed in the surfaces of the wheels, the friction force between the wheels and the wall of the filtering tank is increased, the friction force between the wheels and the wall of the filtering tank is utilized to carry out spatial spiral motion along a spiral track penetrating through the washing brush head, so that forward washing is carried out, the spiral track 15 is made of rectangular strips, and the track holes 40 of the corresponding washing brush head are also rectangular, so that the purpose of reducing the spatial freedom degree of the washing brush head is to ensure that the washing brush head can only move along the spiral track and cannot rotate, so that the vertical contact with the wall of the tank is ensured; the traveling wheels contact with the tank wall to generate gaps, the brush can not contact with the tank wall due to large gap distance, in order to solve the problem, the washing head is made into a telescopic structure, and can be freely adjusted according to the size of the gap in the moving process, so that the problem that the brush head cannot contact with the tank wall is solved. Because the position sensor 39 is arranged on the spiral track, when the washing head moves to the bottom position sensor, the sensor feeds back a signal to the control system, and after the control system receives the signal, the control system sends an instruction through the wireless transmitter to enable the motor with the wireless receiver arranged inside the washing head to rotate reversely, so that the washing head returns to the initial position, and the bottom of the tank is cleaned once in the return process.

The medicine dispensing device 33 is a medicine storage, four vacant areas for placing medicines are arranged in the medicine storage according to the medicines needed in the experiment, each vacant area is in a cuboid shape, two ends of each space are provided with holes, one end of each space is provided with a valve mechanism capable of automatically adjusting the size, the other end of each space is connected with a pipeline with a pump, one end with a valve is connected with a control circuit, when the corresponding medicines need to be added in the system, a control console 37 adopts corresponding signal control on the valve to control the addition of the medicines, liquid level sensors are arranged at the upper position and the lower position of each partition plate and are used for monitoring the liquid level, when the liquid level is higher than the highest position or lower than the lowest position, the liquid level sensors can give signals to an alarm system to inform the control console of taking emergency measures, when the liquid level is too high, the valve is closed, the supplement to the medicine storage is stopped, and when the liquid level is too low, the rotation speed of the, the required medicament is added into the medicament warehouse in time.

The sludge and sewage recovery device 36 adopts a cuboid big iron box, the upper part of the big iron box is not provided with a cover, the bottom of the big iron box is designed into a funnel shape, the middle of the big iron box is separated by a partition plate, half of the middle of the big iron box is used for recovering sewage, half of the middle of the big iron box is used for collecting sludge, the conical bottom of the big iron box is connected with a pipeline, the conical bottom of the big iron box is connected with the pipeline through a flange and a valve with a pressure sensor, the sludge in, the sewage treated at various positions of the system is also pumped back into the sewage collecting section from above by the pump, when the bottom pressure in the collecting mechanism reaches a set value, the pressure sensor gives a signal to the bottom valve, the bottom valve is opened instead of being closed previously, and when the pressure is reduced after the sludge and the sewage are discharged for a certain time, the sensor can recognize that the current pressure does not meet the set condition any more, the valve can be automatically closed, and the pressure can be closed next time until the pressure meets the condition again.

Sump oil is retrieved through sump oil recovery unit 34, and during sump oil entered into sump oil recovery jar through the entry through the filter screen, the jar divide into the three-layer, and every layer all has a net variation in size's filter screen for some impurity can be sifted away to sump oil in the in-process that subsides down, reduces the impurity content of oil outlet department as far as possible, and oil outlet department also contains a filter screen simultaneously. A pressure sensor is arranged near each filter screen, an alarm device is correspondingly arranged, when the pressure of a certain part of the filter screens is increased due to excessive impurities, the alarm device can remind people, and then the corresponding filter screens need to be replaced and cleaned; the oil collecting device is also internally provided with a space spiral heating pipeline 35 from the top to the bottom, the top is a hot water inlet, the bottom is a hot water outlet, and due to the change of the environment, the oil in the tank flows slowly sometimes and cannot meet the treatment requirement of equipment, and at the moment, the viscosity of dirty oil can be reduced by increasing the temperature of the oil, so that the fluidity of the oil is improved. The long-term use of the dirty oil recovery device 34 can accumulate a large amount of oil stains, and a heating pipeline and a filter screen in the device can be lifted to the outside through a lifting ring to be cleaned and replaced.

The operation process of the device is given as follows:

step 1: and checking whether the equipment works normally.

Step 2: and starting a pump to pump the raw water to a sedimentation link.

And step 3: the speed pressure is checked for abnormalities by the console.

And 4, step 4: waiting for a period, if no alarm is generated, sampling each link to see whether the standard is met. If an alarm or an abnormality occurs, the problem at the alarm position needs to be solved, and the next work is carried out after the alarm is released.

And 5: if the standard is not satisfied, the cause of the possible problem is analyzed according to the data information received by the console everywhere. And (3) controlling the parameter change of the corresponding position according to possible reasons of analysis, such as the flow is small and needs to be increased, the pressure is large and needs to be reduced, waiting for a period of time to collect a part of samples after the operations are performed, analyzing and debugging are continued if the standard is met, and the conditions are met.

Step 6: after the standard is met, the parameters of each link need to be reserved and recorded, so that the subsequent work is facilitated, and comparison and investigation are facilitated.

The innovation of the invention is that:

the remote control displacement device, what every big device bottom of bodily form all set up has the gyro wheel system, and every gyro wheel system is total four gyro wheels 17, and every horizontal two is a pair of, and wherein two back are driving system, and remaining two are used for the control direction, and whole gyro wheel system carries out the transmission of signal through the infrared ray, and every device all is furnished with a remote controller, and then can conveniently carry out laying and consignment of device, has reduced the cost of manpower.

Frequency conversion stirring operating system, this system cooperation settlement system carries out work, in traditional sewage treatment plant, natural settling generally only relies on long-time settlement process, add frequency conversion stirring operating system after, according to the change of water inlet speed pressure sensor signal, change agitating unit's stirring frequency for oily sewage is more abundant mix before subsiding, thereby do benefit to next settlement process, this agitating unit designs in addition and is convenient later washing and change for can automatic rising.

Swash plate mechanism, according to shallow pool principle, be more tiny level with the moisture in the jar, the area of contact of sewage with the board has been increased, thereby be favorable to subsiding more, realized in same time, the effect that sewage subsides is more effective, swash plate structure is formed by a plurality of toper plastics buckled plate combinations, there is the earhole in the both sides of its upper portion to be used for calling out it when wasing a change, there is bearing structure 11 in the lower part, bearing structure 11 is the fretwork, make things convenient for the rivers play of top, select appropriate swash plate number according to the diameter size of subsideing device, reduce the cost as far as possible when raising the effect.

The two-stage settlement device is the core of this design, carry out corresponding operation in real time according to the condition of subsiding, mixing system is more even in order to make the oily sewage that just got into mix, make oil drop and oil drop, can form bigger oil drop and impurity between impurity and the impurity, be convenient for next settlement, subside the difference with the tradition and increased and wash the structure of changing, each part of the long-time work of device can certainly accumulate a large amount of dirt, self-cleaning device can be to mixing system, subside lateral wall and bottom and carry out periodic scraping and washing, thereby can improve the working effect.

The automatic control system for the water inlet and the water outlet of the water turbine has the advantages that the flow velocity pressure of water inlet and water distribution, water collection and water outlet and the like are achieved, the automatic control valves are arranged at the water inlet and the water outlet, the precision is always limited due to manual operation, delay generally exists, the problems can be effectively solved by adopting the electric control valves, the control console controls the states of the electric valves at the corresponding positions and the opening degree of the valves according to signals returned by the corresponding water inlet and water outlet flow pressure sensors, and therefore the automation level of the whole system is improved.

The dispensing device 33 adopts an automatic system controlled by an online limit signal, and the console knows the adding condition of the medicine at each link, for example, the added medicine is less, some medicine is added with less pressure and needs to be pressurized, while the other part is added with too much medicine, and the pressure needs to be reduced when the pressure at the part is too high; in addition, the drug depot itself needs to be periodically supplemented with the corresponding drug. The flow pressure is controlled according to the sensor signal at each dosing position, and the medicine storehouse senses whether the medicines in the medicine storehouse are filled or not enough by adopting the pressure sensors with upper and lower limiting positions.

The water distribution system in the filtering and backwashing device 24 is different from the traditional fixed structure, and the water distribution system in the invention can slowly rotate around a central shaft at a constant speed by means of the couple action of the water distribution system, so that the problems of uneven water distribution dead angles and the like are solved; the invention adopts a layered variable-frequency stirring device, filter materials are divided into three layers, a plate-shaped structure capable of being divided is arranged between each layer, the surface layer of the filter materials can accumulate a large amount of dirt and impurities due to long-time filtration, and some filter materials can not participate in the filtration process.

The invention simulates the actual natural sedimentation effect through the primary sedimentation device, realizes the secondary coagulation sedimentation effect through the dosing link, and can adjust the parameters of the driving amount to control the adding amount of the medicament in real time, thereby realizing more accurate control. In the aspect of transportation, the electric roller is arranged, the electric roller can be pushed by manpower under the condition of no power supply, and the position of the device can be conveniently changed through electric control by matching with a remote controller of the electric roller, so that the whole system is more convenient to install. For convenience of maintenance and cleaning, where each device is reserved with a place where the lifting device can be hung up by a crane, the lifting device 18 refers to fig. 18, and meanwhile, a part which is easy to scale is exposed through an automatic lifting device and then is cleaned. The actual filtering backwashing is simulated through the filtering backwashing device 24, the sensors are inserted into various simulation devices, the types of the sensors are more, the sensors mainly comprise a flow sensor, a pressure sensor, a temperature sensor, a pH value sensor, a suspended matter concentration sensor, a suspended matter particle size sensor, a sensor for measuring the oil content and the like, the sewage treatment effect is known, and then the relevant links can be debugged by means of the parameters until the standard of reinjection water or external drainage is reached. The control of the whole device system controls the opening degree of a valve, the driving force of a medicament and the amount of the medicament at the corresponding position according to real-time data measured by each sensor and the returned data, the whole device is controlled through a console, and the data at each position is returned to an upper computer through a data acquisition system. In order to further conveniently monitor the sewage treatment condition, the invention also adopts a wireless transmission technology, the whole simulation system is in a space with a smaller range, so the realization of the wireless transmission technology is feasible, the transmission speed is also fast, the system gives a signal, and a corresponding mechanism can quickly respond, thereby avoiding the problem of delay. In terms of control technology, the control of the entire device system can be performed by the host of the console. In addition, in order to realize further automation and monitor the operation of the whole system remotely, the invention also designs a mobile phone APP closely connected with the processing system, a user can conveniently know the operation condition of the whole system through the mobile phone client, and an alarm system is also provided in the APP.

Claims (10)

1. The utility model provides an oil field produced water handles simulation experiment device which characterized in that: the oilfield produced water treatment simulation experiment device comprises a raw water preparation device, a natural sedimentation device (1), a coagulation sedimentation device (2), a boosting buffer device (23), a filtering backwashing device (24), a dispensing device (33), a sump oil recovery device (34), a sludge and sewage treatment device (36), an automatic cleaning device, a remote control displacement device, an alarm device and a control console (37), wherein the natural sedimentation device (1) comprises a natural sedimentation tank, a water inlet and distribution structure, a water collecting structure, an oil collecting structure, a water drainage structure and a sludge treatment structure are arranged in the natural sedimentation tank, the water inlet and distribution structure comprises a water inlet part and a water distribution part, an electric control valve is arranged at a water inlet of the water inlet part, the flow rate and the flow rate of inlet water are controlled, and a flowmeter and a pressure gauge are arranged around the electric control valve; the water distribution part is provided with a plurality of water distribution ports, each water distribution port is provided with an electric control valve, each water distribution port is provided with a filter head, the filter head is connected with an automatic assembling and disassembling device, the automatic assembling and disassembling device is used for transferring the filter head which is fully covered with dirt to a cleaning area for cleaning, then the filter head is returned to the water distribution port for re-installation, and the flow of the water distribution part is controlled in real time on a console system interface according to data transmitted by a flow velocity sensor and a pressure sensor; the water distribution part is provided with an automatic frequency conversion stirring device, and the stirring frequency of the stirring device is changed according to the change of the water inlet speed and the signal of the pressure sensor, so that the oily sewage is fully mixed before sedimentation; a sludge collecting port is formed at the bottom of the settling tank and is connected with a negative pressure suction system; a side wall washing and scraping device (12) is arranged above the natural settling tank, the side wall washing and scraping device (12) is connected with the automatic lifting assembly, and the side wall washing and scraping device (12) is conveyed to the bottom of the natural settling tank by the automatic lifting assembly to be washed; a throttling speed-regulating electric control valve is arranged on the water outlet pipeline; an air floatation device is arranged below the natural settling tank and arranged on a supporting frame structure, pulleys (21) are arranged on two side edges of the supporting frame structure, the pulleys (21) are in contact with rails, and the rails are arranged on two sides close to the tank wall; the oil collecting structure is an oil collecting tank (7), a circle of oil outlet weir is arranged near an oil layer of the oil collecting tank (7), the oil outlet weir is triangular, a circle of thin plate is arranged on the inner wall of the oil outlet weir, the thin plate is arranged on a slideway, a circle of heating coil (8) is arranged at the bottom of the oil collecting tank, and the bottom surface of the oil collecting tank is provided with a slope; the natural settling tank is provided with 4 sampling ports from top to bottom, each sampling port is provided with a sampling device (9), the position where oil and water are contacted is provided with one sampling port, the lower deeper part is provided with one sampling port, the middle part of the natural settling tank is provided with one sampling port downwards, finally, a solid-liquid interphase position is provided with one sampling port, the outlet of each sampling port is provided with a stop valve, the other end of each stop valve is connected with a hose, and the hose is connected with a sampling container;

the coagulation sedimentation device (2) is provided with one more inclined plate structure (10) than the natural sedimentation device (1), the inclined plate structure (10) is formed by combining a plurality of plastic corrugated plates, each plastic corrugated plate is horn-shaped, the plurality of plastic corrugated plates are alternately combined layer by layer from inside to outside, a fixedly connected structure is arranged between every two adjacent plastic corrugated plates, the inclined plates are arranged on the supporting structure (11), and the upper parts of the inclined plates are provided with hanging rings;

the boosting buffer device (23) comprises a cylinder, an alarm device and a filter screen, wherein the filter screen is detachably arranged at the bottom of the boosting buffer device, a sewage discharge outlet is arranged below the filter screen, the boosting buffer device (23) enables mixed liquid with unstable pressure and unstable flow velocity flowing upstream to be stabilized within a range, a pressure sensor and a flow sensor are arranged at a position half meter away from the inlet of the cylinder, the right end of the cylinder is provided with an outlet, the outlet is connected with a water outlet pipeline, the boosting device is arranged at the position where the water outlet pipeline and the outlet are alternated, and the outlet is also provided with the flow sensor and; a rectangular sealing opening is formed in the side wall, close to the filter screen, of the barrel, and the filter screen (28) is cleaned and replaced and is moved out of the barrel through the cleaning sealing opening; determining the retention time of the mixed liquid in the buffer device according to the data transmitted by the pressure sensor and the flow sensor, and if the pressure and the flow are overlarge, generating an alarm by the alarm device;

the filtering and backwashing device comprises a filtering tank, a water inlet and distribution device, a filter head screen structure (25), a filter material layer, a backing layer (30), a water collecting mechanism (29), a layered frequency division stirring and pressurizing flushing device (27), a sludge dirt collecting structure (13), a backwashing loop structure and a pressure alarm, wherein the filter material layer is replaced and cleaned; the layered frequency division stirring and pressurizing flushing device (27) is characterized in that each layer of the filter material layer is correspondingly provided with a stirring paddle, the size, the number and the inclination angle of each layer of the stirring paddles are different, the stirring paddles are provided with pipe diameter devices with small holes, and clean clear water passes through the small holes at a certain pressure and then is sprayed into the filter material when the stirring paddles rotate, so that the filter material is further cleaned; the sludge and dirt collecting structure (13) is arranged at the bottom of the filter tank, the bottom of the filter tank is in an ellipsoidal shape, a pit is formed in the bottom of the filter tank, a valve mechanism which can be automatically opened and closed according to pressure is installed at the bottom of the pit, the washing head (14) is arranged close to the ellipsoidal surface, the washing head (14) is used for scraping the ellipsoidal surface according to a set spiral track, after the bottom is reached, dirt on the washing head falls into the pit based on the action of gravity, and after the weight of sediment reaches a set pressure value, the valve mechanism is automatically opened.

2. The oilfield produced water treatment simulation experiment device of claim 1, wherein: the control console (37) is connected with a mobile phone APP through a network.

3. The oilfield produced water treatment simulation experiment device of claim 2, wherein: the dispensing device is provided with a plurality of vacant areas for placing medicines through partition plates, each vacant area is in a cuboid shape, two ends of each vacant area are provided with holes, an automatic adjusting valve is installed at one end of each vacant area, the other end of each vacant area is connected with a pipeline with a pump, the automatic adjusting valves are connected with a control circuit, and a control console (37) controls the addition of a certain medicine through corresponding automatic adjusting valves; the upper and lower positions of each partition plate are provided with liquid level sensors for monitoring the liquid level, when the liquid level is higher than the highest position or lower than the lowest position, the liquid level sensors can send signals to an alarm system to inform a control console (37) to take emergency measures, when the liquid level is too high, an automatic regulating valve is closed to stop adding the medicine storehouse, and when the liquid level is displayed to be too low, the rotation speed of a pump machine can be increased, and required medicines can be added into the medicine storehouse in time.

4. The oilfield produced water treatment simulation experiment device of claim 3, wherein: the sludge sewage treatment device (36) adopts an open cuboid big iron box, the bottom of the sludge sewage treatment device is designed into a funnel shape, the middle of the sludge sewage treatment device is separated by a partition plate to form a sludge pond and a sewage pond, the conical bottom of the sludge sewage treatment device is connected with a pipeline, and the conical bottom of the sludge sewage treatment device is connected with a valve with a pressure sensor through a flange.

5. The oilfield produced water treatment simulation experiment device of claim 4, wherein: the dirty oil recovery device (34) is a dirty oil recovery tank, the tank body is divided into three layers, each layer is provided with a filter screen with different grid sizes, so that a part of impurities are screened off in the process of downward sedimentation of dirty oil, the oil outlet also comprises a filter screen, a pressure sensor and an alarm device are arranged near each filter screen, and when the pressure of a certain part of the filter screens is increased due to excessive impurities on the certain part of the filter screens, the alarm device reminds the replacement and cleaning of the filter screens at the part of the filter screens; the inner wall of the tank body is provided with a spiral heating pipeline from top to bottom, the top is provided with a hot water inlet, and the bottom is provided with a hot water outlet.

6. The oilfield produced water treatment simulation experiment device of claim 5, wherein: the lateral wall wash and scrape axis of rotation that device (12) utilized automatic frequency conversion agitating unit (16) to drive, the axis of rotation passes through separating mechanism, drive mechanism and connects the lateral wall and wash and scrape the device, utilize separating mechanism, when wasing, wash the axis of rotation and scrape device (16) through drive mechanism and lateral wall and connect, wash intensity and adjust through the inverter pump, signal control through control cabinet (37) is adjusted the speed size of inverter pump, the transfer axle sets up elevating gear.

7. The oilfield produced water treatment simulation experiment device of claim 6, wherein: the sludge dirt collecting structure comprises a washing head (14) and a spiral track (15), the washing head is telescopic and can rotate, the cross section of the spiral track is rectangular, the washing head (14) comprises a brush and a washing head box (13), a small motor and a washing controller which can control forward and reverse rotation are arranged in the washing head box, two walking wheels (38) are arranged on the side edge of the washing head box, track holes (40) are formed in the washing head box (13), the spiral track (15) penetrates through the track holes (40), the washing head box (13) is in sliding connection with the spiral track (15), and a starting end and a tail end of the spiral track are provided with position sensors (39).

8. The oilfield produced water treatment simulation experiment device of claim 7, wherein: the water distribution pipe of the water inlet and distribution device slowly rotates around the central shaft at a constant speed.

9. The oilfield produced water treatment simulation experiment device of claim 8, wherein: the filter material layer of the filtering and backwashing device (24) is divided into three parts, the grain diameter is larger and larger from top to bottom, the filter material on the uppermost layer is fine sand with fine grain diameter, the filter material on the middle layer is coarse sand with fine grain diameter, the filter material on the lowermost layer is gravel with larger grain diameter, the lining layer is arranged below the gravel, and the lining layer (30) supports the filter material layer.

10. The oilfield produced water treatment simulation experiment device of claim 9, wherein: the layering frequency division stirring pressurization washing unit (27) at the three-layer stirring rake, the superiors' stirring rake has 8 paddles, the middle second floor stirring rake has 6 paddles, the third layer stirring rake has 4 paddles.

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