CN104560128B - Vertical electrostatic coalescer sledge dressization testing apparatus and method - Google Patents

Abstract

The skid-mounted test device and method of the vertical electrostatic coalescer can be tested in the oil field, can evaluate the working performance of the vertical electrostatic coalescer, and optimize the equipment processing capacity and electric field parameters. All equipment is fixed on a skid-mounted chassis for easy transportation, mainly including power supply equipment, coalescing equipment and separation equipment. The power supply equipment is a control cabinet and a transformer, which can provide high voltage for the vertical electrostatic coalescer to promote the coalescence of water droplets in the water-in-oil emulsion; use bypass gate valves and pipeline pumps to adjust the vertical electrostatic coalescer and oil-water For the capacity of the separator, measure the water content at the inlet and outlet of the coalescer and the oil outlet of the separator by distillation to compare and analyze the separation effect of the test system, and optimize the capacity and electric field parameters of the equipment accordingly. The skid-mounted equipment of the present invention has the advantages of convenient transportation and quick installation, can test the working performance of the vertical electrostatic coalescer, and is helpful for equipment selection and operation parameter optimization.

Description

Vertical electrostatic coalescer skid-mounted test device and method

technical field

The invention relates to a skid-mounted test device and method for a vertical electrostatic coalescer, which is used for simulating the process flow of the enhanced dehydration of the vertical electrostatic coalescer, and belongs to the dehydration process of oilfield produced fluid in an oil and gas gathering and transportation system.

Background technique

Water-in-oil emulsions widely exist in industrial production processes such as petroleum and chemical industry. Chemical and physical methods are usually used to accelerate the thinning and rupture of the interfacial film of water droplets to improve the coalescence efficiency. Electrostatic coalescence technology is one of the commonly used methods in the crude oil dehydration process. Its basic principle is to apply a high-strength electric field to the emulsion to increase the collision and aggregation of dispersed water droplets, promote the coalescence of water droplets, and accelerate the separation of oil and water.

Most of the combined stations of onshore oilfields in my country currently use traditional horizontal electric dehydrators, but with the use of a large number of tertiary production aids, a stable water-in-oil emulsion is formed, resulting in an increase in water content and difficulty in demulsification. Polymers are easy to accumulate in the electric dehydrator, which may cause a decrease in electric field strength, excessive dehydration current or "collapse electric field", which has a great impact on oil field production. The vertical electrostatic coalescer is a new type of high-efficiency emulsion coalescing equipment developed to cope with the current situation. It has the advantages of greatly reducing the volume of the equipment on the premise of ensuring efficient separation of oil and water, saving costs and reducing energy consumption. , improve safety performance, and adapt to the needs of today's oilfield production and development. US Patent No. 6,136,174 discloses an electrostatic coalescer (CEC) for crude oil dehydration. The electrode part is alternately arranged in the form of vertical coaxial cylinders with insulating electrodes and metal electrodes. Chinese patent 200710015911.1 (authorized patent announcement number CN101173182A) discloses a crude oil emulsion electrostatic dehydrator, the coalescing section is installed on the upper part of the electric dehydrator, and the electrode part is also composed of an insulating electrode and a metal electrode in the form of a vertical coaxial cylinder Alternately. This form of electrode makes full use of the space and has the advantages of compact structure and small footprint. At present, most of the vertical electrostatic coalescers are installed on site, and then debugged to determine the working parameters. However, since the physical and chemical properties of water-in-oil emulsions formed in different blocks are different, the electric field strength, electric field frequency and electric field waveform that can achieve effective electric coalescence of water droplets are also different. Whether the vertical electrostatic coalescer can adapt to the field The processing environment is also unknown, which may result in unreasonable equipment selection or failure to work normally, wasting investment. Therefore, before installing the vertical electrostatic coalescer, it is of great significance to evaluate the coalescence effect of the water-in-oil emulsion after electrification and optimize the electric field parameters for the design of the electrostatic coalescer and the purchase of transformer equipment. Chinese patent 201320477801.8 (authorized patent announcement number CN203474723U) discloses a two-stage automatic electric dehydration test device, which cuts the test crude oil into an oil-water emulsion that meets the test requirements through a shearing oil-water mixing device, and then injects it into a dehydration and desalination tank for dehydration with electricity However, the properties of the water-in-oil emulsion are not only related to the shear strength but also related to the processing environment and piping system, so the indoor electrolysis test cannot truly restore the on-site processing environment, and the obtained test results will also be affected. The above-mentioned equipment may be industrial products with large volume, high processing cost, inconvenient transportation and installation, and cannot be conveniently carried out on-site for testing, or because it is an indoor experiment, it is difficult to completely simulate the processing conditions on site, and the results obtained are also inconsequential. representative.

Therefore, it is necessary to use the vertical electrostatic coalescer to conduct tests on site to determine the applicability of the equipment and optimize the process parameters, so that the design of the coalescer and the selection of equipment are more targeted. In view of the above reasons, it is necessary to invent a skid-mounted test system that can be used in the oil field, can simulate the actual production process, evaluate the coalescence effect of the vertical electrostatic coalescer, and optimize the operating parameters of the equipment. It provides a basis for the design and operation of the type electrostatic coalescer, making the equipment design more reasonable and the use more efficient.

Contents of the invention

The purpose of the present invention is to provide a skid-mounted test device and method for a vertical electrostatic coalescer, which solves the problems of different treatment environments for water-in-oil emulsions and the inability to completely reproduce indoor tests, and can be conveniently and quickly applied to oil field sites. The treatment effect and working parameters of the vertical electrostatic coalescer were evaluated and optimized. The results obtained by using the vertical electrostatic coalescer skid-mounted test device can provide a reference for the design of industrial-grade equipment.

A skid-mounted test device for a vertical electrostatic coalescer, characterized in that it includes an inlet pipeline, an outlet pipeline, a flow meter, a vertical electrostatic coalescer, a gravity separator, a water outlet flowmeter, and an oil outlet flowmeter , pipeline pumps, transformers, transformer brackets, skid-mounted chassis;

The vertical electrostatic coalescer, the gravity separator and the transformer are all installed on the skid-mounted chassis, and the escalator is installed on the transformer support on site;

The inlet pipeline is respectively connected to the gate valve 1 and the bypass gate valve 2 through a tee, and the gate valve 1 and the bypass gate valve 2 form a control valve group for controlling the flow of the inlet pipeline; the front end of the gate valve 1 is connected with A metering module; the metering module is composed of a main pipeline and a bypass pipeline with a ball valve, wherein the main pipeline is sequentially composed of a ball valve, a filter, a pressure gauge, a flow meter, and a rear-end ball valve;

A vertical electrostatic coalescer is connected to the front end of the metering module, and the inlet and outlet ports of the vertical electrostatic coalescer are respectively provided with an inlet sampling port and an outlet sampling port, and the vertical electrostatic coalescer is connected to the Transformer connection, the outlet end of the vertical electrostatic coalescer is connected to the gravity separation pipeline and the bypass pipeline through a tee, wherein the gravity separation pipeline is provided with a gate valve and a gravity separator in sequence; The outlet end of the separator is divided into a water outlet and an oil outlet, and the water outlet and the oil outlet are respectively provided with a water outlet sampling port and an oil outlet sampling port. The front ends of the water outlet and the oil outlet are respectively connected with metering modules, and the metering modules are composed of a main pipeline with a flow meter and a bypass pipeline with a ball valve; the front ends of the metering modules of the water outlet and the oil outlet are all Connected to the in-line pump module through a check valve;

The bypass pipeline at the outlet end of the vertical electrostatic coalescer is sequentially connected to the pipeline pump module through the gate valve 2 and the check valve, and the bypass gate valve 1 and the gate valve 2 form a control valve group for controlling the gravity type separator flow;

The other end of the bypass gate valve 2 connected to the inlet pipeline is also connected to the pipeline pump module;

The pipeline pump module is composed of a main pipeline containing a pipeline pump and a bypass pipeline containing a regulating valve, which are used to provide power for the entire system, and the outlet end of the pipeline pump module is an outlet pipeline.

If the frictional resistance of the test system is large and the emulsion cannot flow normally, the pipeline pump can be used to provide power. If it can flow normally, there is no need to turn on the pump, just use the bypass valve of the pipeline pump.

The ports of the inlet pipeline and the outlet pipeline are all equipped with stainless steel wire hoses, which can be connected with on-site processing equipment through flanges and variable diameters.

The processing capacity of the electrostatic coalescer is 0-300m ³ /d (12.5m ³ /h), the height is 2300mm, and the outer diameter of the cylinder is 300mm. The gravity separator has a processing capacity of 0-24m ³ /d (1m ³ /h), a diameter of 0.5m and a length of 1600mm. The treatment flow of the vertical electrostatic coalescer can be adjusted through the bypass gate valve 2, and the treatment flow of the gravity separator can be adjusted through the bypass gate valve 1. The treatment flow of vertical electrostatic coalescer and gravity separator can be accurately measured by flowmeter, water outlet flowmeter and oil outlet flowmeter.

The transformer and the vertical electrostatic coalescer are connected via an explosion-proof steel wire hose and a high-voltage wiring rod; a transformer bracket is arranged on the skid-mounted chassis around the gravity separator, and the transformer is installed on the Above the transformer support, a guardrail is provided around the transformer, and an escalator leading to the transformer is installed on the skid-mounted chassis.

The working process of the present invention is as follows: After the vertical electrostatic coalescer test system installed on the skid-mounted chassis is transported to the oilfield site by truck, the stainless steel wire hose, variable diameter and flange are used to pass through the inlet pipeline and outlet pipeline. etc. are connected to the on-site processing system, and the pipeline pump provides power so that the emulsion can pass through the test system. The transformer is placed on the transformer support, and a guardrail is installed to ensure safety. The high-voltage electricity generated by the transformer is input to the vertical electrostatic coalescer through the explosion-proof steel wire hose and the high-voltage wiring rod to process the water-in-oil emulsion. Open the gate valve 1 and the bypass gate valve 2 to adjust the flow of the water-in-oil emulsion entering the vertical electrostatic coalescer, and measure it through the flow meter. When the flow meets the test requirements, the test can be carried out. The input voltage is adjusted through the control cabinet and output to the vertical electrostatic coalescer after being boosted by the transformer, thereby applying a high-strength electric field to the oil-water emulsion to promote the coalescence of water droplets and accelerate the separation of oil and water. Due to the limitation of the floor area, the volume of the gravity separator is small. When the flow rate of the water-in-oil emulsion flowing through the vertical electrostatic coalescer exceeds the processing capacity of the gravity separator, the bypass can be controlled. The opening of the gate valve 1 is used to adjust the flow into the gravity separator, and at the same time, the processing capacity of the gravity separator is obtained through the measured values of the water outlet flowmeter and the oil outlet flowmeter. The water-in-oil emulsion that has not passed through the gravity separator is directly mixed with the water and oil flowing out of the water outlet and the oil outlet, and flows to the subsequent processing equipment through the outlet pipeline. Due to the compact flow of the test system, a large number of equipment, and high friction, when the pressure in the on-site separation system cannot ensure that the water-in-oil emulsion passes through the test system, it is necessary to start the pipeline pump to provide power for the test system. The pipeline pump is not placed in the inlet pipeline to prevent excessive shearing of the water-in-oil emulsion and increase the difficulty of separation. During the test, the oil content in the water is measured through the water outlet sampling port, and the water content of the inlet sampling port, outlet sampling port and oil outlet sampling port is monitored by distillation to analyze the separation effect of the test system, and the optimal separation effect is determined accordingly. Throughput of vertical electrostatic coalescers and gravity separators. At the same time, the input waveform, voltage and frequency can be adjusted through the control cabinet to evaluate the separation effect under different electric field parameters, and then determine the optimal electric field parameters to provide guidance for equipment design and selection.

The basic principle of the present invention is to connect the test device into the production system of the oilfield site through a stainless steel wire hose, and the water-in-oil emulsion enters the vertical electrostatic coalescer after passing through the flowmeter, and uses the silicon controlled silicon to automatically adjust the voltage or constant current The source control cabinet (connected to the transformer 20) adjusts the input voltage and after boosted by the transformer, it is input to the vertical electrostatic coalescer to apply a high-strength electric field to the oil-water emulsion flowing through the coalescer to promote the coalescence of water droplets and accelerate the separation of oil and water. Part of the water-in-oil emulsion flowing through the vertical electrostatic coalescer is diverted, and part of it enters the gravity separator for gravity sedimentation. The separated oil phase and water phase are discharged through the oil outlet and water outlet, and are separated from those without gravity. The oil-water emulsion separated by the type separator is mixed and enters the subsequent separation equipment. The coalescence effect of the electrostatic coalescer was evaluated by the change of water content at the inlet, outlet and oil outlet of the electrostatic coalescer.

The beneficial effect of the present invention is that all the equipment is installed on the skid-mounted chassis, the structure is compact, and the occupied area is small, and the equipment can be transported to the oil field for on-site testing by truck; the inlet and outlet of the test system are equipped with flanges, It can be quickly connected to the oilfield on-site process through stainless steel wire hoses and variable diameters, without affecting normal production; the pipeline system is covered with an insulation layer to ensure that the temperature of the emulsion remains stable; the inlet, outlet, and separation of the vertical electrostatic coalescer are used The treatment effect of the test system can be evaluated by the change of water content at the oil outlet of the device; the treatment flow of the vertical electrostatic coalescer and separator can be controlled through the bypass gate valve, even if the treatment capacity of the coalescer exceeds the treatment capacity of the separator, it can The equipment can work normally by separating the gate valve, so that the optimal processing capacity of the equipment can be determined, and parameters can be provided for the design and operation of the equipment; the combination of the control cabinet and the voltage regulator can provide a variety of waveforms, adjust the voltage and frequency, and thus be able to evaluate different electric field parameters The separation effect of the system under the action provides a reference for the optimization of electric field parameters; installing a pipeline pump at the outlet can not only provide power for the test system but also avoid excessive shearing of the water-in-oil emulsion at the inlet; the transformer can be placed on the transformer support Improve space utilization and facilitate operation; guardrails and escalators can ensure safety during operation.

Description of drawings:

Fig. 1 is a flow chart of the present invention;

Among them, 1—inlet pipeline 2—gate valve 13—ball valve 4—filter 5—pressure gauge 6—flow meter 7—inlet sampling port 8—vertical electrostatic coalescer 9—outlet sampling port 10—gravity separator 11 —Water outlet 12—Oil outlet 13—Water outlet sampling port 14—Oil outlet sampling port 15—Water outlet flowmeter 16—Check valve 17—Oil outlet flowmeter 18—Pipeline pump 19—Outlet pipeline 20—Transformer 21— Bypass gate valve 122—bypass gate valve 229—gate valve 2.

Fig. 2 is a structural schematic diagram of the present invention.

Among them, 23—explosion-proof steel wire hose 24—guardrail 25—transformer bracket 26—skid-mounted chassis 27—escalator 28—high voltage wiring rod.

detailed description

Referring to accompanying drawing 1 and accompanying drawing 2, the present invention is by inlet pipeline (1), gate valve 1 (2), ball valve (3), filter (4), pressure gauge (5), flowmeter (6), inlet sampling Port (7), vertical electrostatic coalescer (8), outlet sampling port (9), gravity separator (10), water outlet (11), oil outlet (12), water outlet sampling port (13), Oil outlet sampling port (14), water outlet flowmeter (15), check valve (16), oil outlet flowmeter (17), pipeline pump (18), outlet pipeline (19), transformer (20), bypass Through gate valve 1 (21), bypass gate valve 2 (22), explosion-proof steel wire hose (23), guardrail (24), transformer support (25), skid-mounted chassis (26), escalator (27), high-voltage wiring rod ( 28), gate valve 2 (29) etc. are formed. Arrived to be installed on the transformer support (25) on the scene except escalator (27), other equipment all is to be fixed on the skid-mounted chassis (26).

As shown in Figures 1 and 2, the device provided by the present invention integrates coalescence and separation equipment, and can be conveniently applied in the oil field to evaluate the coalescence effect of the vertical electrostatic coalescer and conduct a skid-mounted test on the electric field parameters. System, including: inlet pipeline (1), gate valve 1 (2), ball valve (3), filter (4), pressure gauge (5), flow meter (6), inlet sampling port (7), vertical electrostatic Coalescer (8), outlet sampling port (9), gravity separator (10), water outlet (11), oil outlet (12), water outlet sampling port (13), oil outlet sampling port (14), Water outlet flowmeter (15), check valve (16), oil outlet flowmeter (17), pipeline pump (18), outlet pipeline (19), transformer (20), bypass gate valve 1 (21), bypass Gate valve 2 (22), explosion-proof steel wire hose (23), guardrail (24), transformer bracket (25), skid-mounted chassis (26), escalator (27), high-voltage wiring rod (28), gate valve 2 (29) Wait. It is characterized in that all equipment is installed on the skid-mounted chassis (26), the chassis is 2000mm wide and 6000mm long, and can be transported to the oilfield site by freight truck for testing; The on-site oil-water treatment system of the oilfield is connected; the transformer (20) inputs high-voltage electricity into the vertical electrostatic coalescer (8) through an explosion-proof steel wire hose (23) and a high-voltage wiring rod (28).

The vertical electrostatic coalescer (8) uses an electrostatic field to process the water-in-oil emulsion, and is provided with an inlet sampling port (7) and an outlet sampling port (9), which can measure the water content in the oil and the microscopic morphology of the emulsion. The inner electrode of the vertical electrostatic coalescer (8) can be easily disassembled, different electrode assemblies can be replaced according to the properties of the oil, and the working characteristics of the electrode assemblies can also be tested.

The pipeline pump is installed at the outlet pipeline (19) to prevent strong shearing of the emulsion when it is installed at the inlet pipeline (1), resulting in difficulty in breaking the emulsion and failing to guarantee the accuracy of the test results.

The transformer is installed on the transformer support (25), and is protected by a guardrail (24) and an escalator (27), which is convenient for operation and ensures safety.

After the gravity separator is installed in the vertical electrostatic coalescer (8), the gravity field can be used to process all or part of the water-in-oil emulsion passing through the vertical electrostatic coalescer (8) to separate the water phase . And water outlet sampling port (13) and oil outlet sampling port (14) are respectively installed at water outlet (11) and oil outlet (12) to facilitate the analysis of oil content in water and water content in oil

The bypass gate valve: the processing capacity of the gravity separator (10) can be adjusted through the bypass gate valve 1 (21), even if the processing capacity of the vertical electrostatic coalescer (8) exceeds the processing capacity of the gravity separator (10) The normal operation of the test system can also be ensured by means of diversion, thereby reducing the footprint of the gravity separator (10) and the footprint of the skid-mounted system.

The check valve is installed behind the water outlet flowmeter (15) and the oil outlet flowmeter (17) and before the pipeline pump (18), so as to prevent the liquid from flowing back and causing damage to the equipment and production system.

Utilize above-mentioned vertical electrostatic coalescer skid-mounted test device to carry out the method for equipment working parameter optimization, it is characterized in that comprising the following steps:

1) Transport the above-mentioned vertical electrostatic coalescer skid-mounted test device to the oilfield site by truck, and use the inlet pipeline (1) and outlet pipeline (19) to connect with the on-site processing system,

2) Provide power with the pipeline pump (18), so that the emulsion can pass through the test system;

3) The high-voltage electricity generated by the transformer (20) is input to the vertical electrostatic coalescer (8) to process the water-in-oil emulsion; the gate valve 1 (2) and the bypass gate valve 2 (22) are opened to adjust and enter the vertical electrostatic coalescer The flow rate of the water-in-oil emulsion of the knotter (8) is measured by the flow meter (6), and the test can be carried out when the flow rate meets the preset requirements;

4) By adjusting the input voltage and outputting it to the vertical electrostatic coalescer (8) after being boosted by the transformer (20), a high-strength electric field is applied to the oil-water emulsion to promote the coalescence of water droplets and accelerate the separation of oil and water;

5) When the flow rate of the water-in-oil emulsion flowing through the vertical electrostatic coalescer (8) exceeds the processing capacity of the gravity separator (10), control the opening of the bypass gate valve 1 (21) to Regulate the flow that enters the gravity type separator (10), and obtain the processing capacity of the gravity type separator through the measured values of the water outlet flowmeter (15) and the oil outlet flowmeter (17) simultaneously; not through the gravity type separator (10 ) water-in-oil emulsion directly mixes with the water and oil flowing out from the water outlet (11) and the oil outlet (12) and flows to the follow-up processing equipment through the outlet pipeline (19);

6) During the test, measure the oil content in the water through the water outlet sampling port (13), and use distillation to monitor the water content of the inlet sampling port (7), outlet sampling port (9) and oil outlet sampling port (14) to analyze the test The separation effect of the system, and accordingly determine the processing capacity of the vertical electrostatic coalescer (8) and the gravity separator (10) when the separation effect is optimal;

7) Adjust the input waveform, voltage and frequency through the control cabinet to evaluate the separation effect under different electric field parameters, and then determine the optimal electric field parameters including waveform, electric field intensity and frequency;

The coalescence effect in the electrostatic coalescer is proportional to the square of the electric field intensity E, proportional to the frequency f, proportional to the electric field action time t _E , and inversely proportional to the viscosity μ _o of the oil; and utilizing the gravity separation effect Proportional to the separation time t _s in the gravity separator, inversely proportional to the difference between the oil density ρ _o and the water density ρ _w , inversely proportional to the oil density μ _o , and inversely proportional to the emulsion thickness H;

get two criterion numbers As long as the two criteria of test equipment and industrial equipment are equal; if for the same oil-water emulsion, and the optimal electric field strength and frequency have been obtained through experiments, then it is only necessary to satisfy t _E , t _s when designing the electric dehydrator /H can be consistent;

Where t _E = L _E A _E /Q _E , L _E is the height of the electrostatic coalescer, Q _E is the flow rate of the electrostatic coalescer, A _E is the cross-sectional area of the electrostatic coalescer; t _s /H=Q _s /A _s L _s H, L _s is the length of the separator, Q _s is the flow rate of the separator, A _E is the cross-sectional area of the electrostatic coalescer; through the above formula, the design parameters of the electrostatic coalescer and gravity separator industrial products can be obtained.

For example, the on-site electrostatic coalescer flow rate Q _E is a known parameter; L _E is the height of the electrostatic coalescer, and A _E is the cross-sectional area of the electrostatic coalescer. These two parameters can be adjusted to each other. For example, if the site has a height It is required that L _E is known, and A _E can be obtained. If there is no requirement, adjust LE and A _E according to the actual situation of the equipment to meet the requirements. The ultimate goal is to obtain _LE and _{A E through} the known flow Q _E. Similarly, for the separator t _s /H=Q _s /A _s L _s H, Q _s is also known, and the parameters A _s , L _s , and H are determined according to the specification "SY/T0515-2007 Separator Specification".

Its principle is according to the research and analysis of the present invention, it can be known that the coalescence process in the electrostatic coalescer is proportional to the square of the electric field intensity E, proportional to the frequency f, proportional to the action time t _E of the electric field, and proportional to the viscosity μ _o of the oil. inverse ratio;

The gravity separation process is proportional to the separation time t _s in the gravity separator, inversely proportional to the difference between the oil density ρ _o and the water density ρ _w , inversely proportional to the oil density μ _o , and inversely proportional to the emulsion thickness H;

Therefore, two criterion numbers can be obtained As long as the two criteria of experimental equipment and industrial equipment are equal; if for the same oil-water emulsion, and the optimal electric field strength and frequency have been obtained through experiments, then it is only necessary to satisfy t _E , t _s when designing the electric dehydrator /H can be consistent;

Where t _E = L _E A _E /Q _E , L _E is the height of the electrostatic coalescer, Q _E is the flow rate of the electrostatic coalescer, A _E is the cross-sectional area of the electrostatic coalescer; t _s = Q _s /A _s L _s , L _s is the length of the separator, Q _s is the flow rate of the separator, A _E is the cross-sectional area of the electrostatic coalescer; the design parameters of the electrostatic coalescer and gravity separator industrial products can be obtained through the above formula.

Of course, the separation effect φ and electric field intensity E, electric field frequency f, oil-water density difference ρ _w -ρ _o , oil viscosity μ _o , electrostatic coalescer flow Q _E , and separator flow Q _s can also be obtained by artificial neural network method. The relationship between the separator emulsion layer thickness H, φ=f(E,f,ρ _w -ρ _o ,μ _o ,Q _E ,Q _s ,H), can be used to make parameters of industrial products.

Claims (5)

1. a vertical electrostatic coalescer sledge dressization testing apparatus, it is characterized in that comprising entrance pipe (1), export pipeline (19), under meter (6), vertical electrostatic coalescer (8), gravitational separator (10), water out under meter (15), oil export under meter (17), in-line pump (18), transformer (20), transformer bracket (25), sledge cartridge chassis (26) and staircase (27);

Described vertical electrostatic coalescer (8), gravitational separator (10) and transformer (20) are installed on sledge cartridge chassis (26), and described staircase (27) is installed on transformer bracket (25) at the scene;

Described entrance pipe (1) connects gate valve 1 (2) and by-pass gate 2 (22) respectively by threeway, and described gate valve 1 (2) and by-pass gate 2 (22) composition control valve group are for controlling the flow of entrance pipe (1); Described gate valve 1 (2) front end is connected with metering module; Described metering module is made up of the by-pass line of main line and band ball valve, and wherein main line is made up of ball valve (3), strainer (4), tensimeter (5), under meter (6), rear end ball valve successively;

Vertical electrostatic coalescer (8) is connected in the front end of described metering module, the inlet end of described vertical electrostatic coalescer (8) and exit end are respectively equipped with entrance thief hole (7) and outlet thief hole (9), described vertical electrostatic coalescer (8) is connected with transformer (20), the exit end of described vertical electrostatic coalescer (8) is connected with by-pass line with gravity separation pipeline respectively by threeway, wherein gravity separation pipeline is provided with successively by-pass gate 1 (21) and gravitational separator (10); The exit end of described gravitational separator (10) is divided into water out (11) and oil export (12), and described water out (11) and oil export (12) are respectively equipped with water out thief hole (13) and oil export thief hole (14); The front end of described water out (11) and oil export (12) is connected to metering module, the main line of described metering module by band under meter and the by-pass line composition of band ball valve; The front end of the metering module of described water out (11) and oil export (12) is all connected to in-line pump module by check valve (16);

The by-pass line of described vertical electrostatic coalescer (8) exit end is connected with described in-line pump module with check valve by gate valve 2 (29) successively, and described by-pass gate 1 (21) and gate valve 2 (29) composition control valve group are for controlling the flow of gravitational separator;

Described by-pass gate 2 (22) the other end be connected with entrance pipe (1) is also connected with described in-line pump module;

Described in-line pump module is made up of the main line containing in-line pump (18) and the by-pass line containing variable valve, and for providing power for whole system, the exit end of in-line pump module is export pipeline (19).

2. vertical electrostatic coalescer sledge dressization testing apparatus as claimed in claim 1, is characterized in that the port of described entrance pipe (1) and export pipeline (19) is all with stainless steel wired hose.

3. vertical electrostatic coalescer sledge dressization testing apparatus as claimed in claim 1, is characterized in that described electrostatic coalescer treatment capacity is 0 ~ 300m ³/ d is highly 2300mm, cylindrical shell external diameter 300mm; The treatment capacity of described gravitational separator (10) is 0 ~ 24m ³/ d, diameter 0.5m, long 1600mm.

4. vertical electrostatic coalescer sledge dressization testing apparatus as claimed in claim 1, is characterized in that being connected with high-voltage connection rod (28) via explosion-proof wired hose (23) between described transformer (20) and vertical electrostatic coalescer (8); Around gravitational separator (10), there is transformer bracket (25) to be arranged on described sledge cartridge chassis (26), described transformer (20) is arranged on transformer bracket (25) top, around transformer (20), be provided with guardrail (24), sledge cartridge chassis (26) is provided with the staircase (27) leading to transformer (20).

5. utilize the vertical electrostatic coalescer sledge dressization testing apparatus described in claim 1 to carry out the preferred method of equipment parameters, it is characterized in that comprising the following steps:

1) by lorry, above-mentioned vertical electrostatic coalescer sledge dressization testing apparatus is transported to Oil Field, utilizes entrance pipe (1) to be connected with site disposal system with export pipeline (19),

2) provide power with in-line pump (18), pass through pilot system to enable milk sap;

3) produce high voltage electric by transformer (20) and be input to process water-in-oil emulsion in vertical electrostatic coalescer (8); Open gate valve 1 (2) and by-pass gate 2 (22) and regulate the flow entering the water-in-oil emulsion of vertical electrostatic coalescer (8), and measured by under meter (6), namely can test after flow meets default requirement;

4) by regulating input voltage and exporting in vertical electrostatic coalescer (8) after transformer (20) boosting, thus high-strength electric field is applied to water-oil emulsion, impel water droplet to occur coalescent, accelerate oily water separation;

5) when the flow of the water-in-oil emulsion flowing through vertical electrostatic coalescer (8) is larger than the treatment capacity of gravitational separator (10), regulating by controlling the aperture of by-pass gate 1 (21) flow entering gravitational separator (10), being obtained the treatment capacity of gravitational separator simultaneously by the observed value of water out under meter (15) and oil export under meter (17); The water directly do not flowed out with water out (11) and oil export (12) through the water-in-oil emulsion of gravitational separator (10), oilyly mix and flow to subsequent processing device through export pipeline (19);

6) oil length in water is measured by water out thief hole (13) in process of the test, adopt method monitoring entrance thief hole (7) of distillation, the water ratio of outlet thief hole (9) and oil export thief hole (14) carrys out the separating effect of analytical test system, and determines the treatment capacity of vertical electrostatic coalescer (8) and gravitational separator (10) when separating effect is optimum accordingly;

7) regulate input waveform by housing, voltage and frequency, to evaluate the separating effect under different electric pulse field parameter, and then determine that optimum electric pulse field parameter comprises waveform, strength of electric field and frequency;

Utilize square being directly proportional of the coalescent effect in electrostatic coalescer and electric field strength E, be directly proportional to frequency f, with electric field action time t _ebe directly proportional, with oil viscosity μ _othe character be inversely proportional to; And utilize disengaging time t in gravity separation effect and gravity separator _sbe directly proportional, with oil density ρ _owith water-mass density ρ _wdifference be inversely proportional to, with the density μ of oil _obe inversely proportional to, the character be inversely proportional to milk sap thickness H;

Obtain two criterion numerals as long as two criterion numerals meeting testing installation and industrial equipments are equal; If for same water-oil emulsion, and obtain optimum strength of electric field and frequency by experiment, as long as so meet t when designing electrical dehydrator _e, t _s/ H is consistent;

Wherein t _e=L _ea _e/ Q _e, L _efor electrostatic coalescer height, Q _efor electrostatic coalescer flow, A _efor electrostatic coalescer sectional area; t _s/ H=Q _s/ A _sl _sh, L _sfor separator length, Q _sfor separator flow, A _efor electrostatic coalescer sectional area; Namely the design variable of electrostatic coalescer and gravity separator Industrial products can be obtained by above-mentioned formula.