CN108502978B - Integrated circulation regeneration device and method for oil field - Google Patents
Integrated circulation regeneration device and method for oil field Download PDFInfo
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- CN108502978B CN108502978B CN201810208564.2A CN201810208564A CN108502978B CN 108502978 B CN108502978 B CN 108502978B CN 201810208564 A CN201810208564 A CN 201810208564A CN 108502978 B CN108502978 B CN 108502978B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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Abstract
The invention provides an integrated circulation regeneration device and method for an oil field, which comprises a salt supplementing circulation mechanism and a pollution discharge cleaning mechanism; salt supplementing circulation mechanism includes: a salt inlet valve, a circulating valve, a suction valve and a salt pump; the salt-feeding pipeline and the circulating pipeline are connected in parallel, the circulating valve is arranged on the salt-feeding pipeline, the suction valve and the salt pump are arranged on the circulating pipeline, and the circulating pipeline and the salt-feeding pipeline are connected in parallel and then are connected in series with the salt-feeding valve; the salt pump is arranged between the suction valve and the salt inlet valve; blowdown wiper mechanism includes: the sewage treatment device comprises a first sewage draining suction valve, a sewage draining valve, a cleaning valve, a second sewage draining suction valve and a sewage draining pump; the sewage pipeline comprises a second sewage suction valve, a first sewage suction valve and a sewage pump, and the pipeline provided with the second sewage suction valve and the pipeline provided with the first sewage suction valve are connected in parallel and then connected in series with the sewage pump; a cleaning valve is arranged on the cleaning pipeline; the blowdown pipeline and the cleaning pipeline are connected in parallel and then connected in series with a blowdown valve; the blowdown pipe and the purge pipe are both connected to the brine area.
Description
Technical Field
The invention relates to the technical field of oilfield equipment, in particular to an oilfield integrated circulating regeneration device and method.
Background
Oil is an indispensable energy source in the current human society, and the improvement of oil exploitation efficiency and the reduction of consumption of other resources during exploitation are also main directions of the research of oil exploitation equipment at present. A plurality of existing oil fields need to use water treatment equipment of an oil field movable steam injection station, and the water treatment equipment of the oil field movable steam injection station mainly comprises a saline water system and a sewage system; the brine system and the sewage system are two auxiliary supporting devices which are independent from each other and are key nodes of the water treatment process flow.
The brine system is the primary means of producing brine of acceptable concentration. The main application is to exchange and regenerate cation resin by using chloride ions in brine, so that the cation resin recovers the capacity of adsorbing calcium and magnesium ions, and is continuously treated to generate qualified softened water.
The sewage discharge system is a main device for collecting and conveying the discharged liquid in the process of finishing water treatment regeneration and operation.
The field operation summary finds that the two existing systems mainly have the following defects:
a. the process design is unreasonable;
b. the functions are incomplete, and the manual input workload is large;
c. the independent flow is complex and tedious;
d. the operation and maintenance management cost is high;
e. the degree of automation is low.
Disclosure of Invention
In view of the problems in the prior art, the technical problem to be solved by the embodiments of the present invention is to at least partially solve the problems in the prior art.
In order to solve the above problems, an embodiment of the present invention provides an integrated circulation and regeneration device for an oil field, which includes an integrated sewage area and a brine area separated from each other, and further includes a salt supplementing circulation mechanism and a pollution discharge cleaning mechanism;
wherein the salt supplementing circulating mechanism comprises: a salt inlet valve, a circulating valve, a suction valve and a salt pump; the salt-removing device also comprises a salt inlet pipeline and a circulating pipeline which are mutually connected in parallel, wherein the circulating valve is arranged on the salt inlet pipeline, the suction valve and the salt pump are arranged on the circulating pipeline, and the circulating pipeline and the salt inlet pipeline are connected in parallel and then are connected in series with the salt inlet valve; the salt pump is arranged between the suction valve and the salt inlet valve;
wherein the blowdown wiper mechanism includes: the sewage treatment device comprises a first sewage draining suction valve, a sewage draining valve, a cleaning valve, a second sewage draining suction valve and a sewage draining pump; the sewage treatment device also comprises a sewage discharge pipeline and a cleaning pipeline which are connected in parallel, wherein the sewage discharge pipeline comprises a second sewage discharge suction valve, a first sewage discharge suction valve and a sewage discharge pump, and the pipeline provided with the second sewage discharge suction valve and the pipeline provided with the first sewage discharge suction valve are connected in parallel and then are connected in series with the sewage discharge pump; a cleaning valve is arranged on the cleaning pipeline; the blowdown pipeline and the cleaning pipeline are connected in parallel and then connected in series with a blowdown valve; the sewage discharge pipeline and the cleaning pipeline are connected into the saline water area;
when water is added into the saline water area, the salt inlet valve, the circulating valve and the salt pump are opened, so that the salt pump drives salt to enter the salt supplementing circulating mechanism from the salt inlet pump, and water in the water softener enters the salt supplementing circulating mechanism from the salt inlet valve; after the water and the salt are mixed and dissolved in the salt supplementing circulating mechanism, the water and the salt enter a salt water area from a circulating valve;
when the self-circulation is carried out on the saline area, the circulating valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to dissolve in the water sucked from the saline area by the suction valve after entering the salt supplementing circulation mechanism, and the water is returned to the saline area from the circulating valve;
when salt enters the brine area, the salt inlet valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to enter the salt supplementing circulation mechanism, and then the salt is dissolved in the water sucked from the brine area by the suction valve and is conveyed to the water softener connected with the salt inlet pipeline from the salt inlet valve;
when the saline water area is subjected to sewage discharge, the sewage discharge valve and the second sewage discharge suction valve are opened, and the sewage discharge pump is started to suck sewage in the saline water area from the second sewage discharge suction valve and then discharge the sewage from the sewage discharge valve;
when the line is swept for the saline water area, the salt inlet valve is firstly opened to convey water from the water softener to the salt supplementing circulating mechanism, and then the suction valve and the circulating valve are sequentially opened to clean the salt inlet pipeline and the circulating pipeline of the salt supplementing circulating mechanism.
Wherein the saline water area is divided into a clear layer, a circulating layer, a salt accumulation layer and a dirty layer from top to bottom; wherein the circulation pipeline is arranged between the clear layer and the circulation layer; the salt inlet pipeline is arranged between the circulating layer and the salt accumulation layer, and one side, facing the circulating layer, of the salt inlet pipeline is provided with openings distributed along the axial direction of the salt inlet pipeline; the pipeline of the first sewage draining suction valve is arranged between the salt deposit layer and the sewage layer, and one side, facing the salt deposit layer, of the pipeline of the first sewage draining suction valve is provided with openings distributed along the axial direction of the cleaning pipeline; wherein the cleaning pipeline extends into the dirty layer, and the pipeline provided with the second blowdown suction valve also extends into the dirty layer and is arranged below the cleaning pipeline.
And the bottom of the sewage area is communicated with a sewage layer at the bottom of the saline area through a pipeline.
And pressure gauges are respectively arranged at the front end and the rear end of the blowoff valve.
Meanwhile, the embodiment of the invention also provides an oilfield integrated circulation regeneration method by using the oilfield integrated circulation regeneration device, which comprises the following steps:
when water is added into the saline water area, the salt inlet valve, the circulating valve and the salt pump are opened, so that the salt pump drives salt to enter the salt supplementing circulating mechanism from the salt inlet pump, and water in the water softener enters the salt supplementing circulating mechanism from the salt inlet valve; after the water and the salt are mixed and dissolved in the salt supplementing circulating mechanism, the water and the salt enter a salt water area from a circulating valve;
when the self-circulation is carried out on the saline area, the circulating valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to dissolve in the water sucked from the saline area by the suction valve after entering the salt supplementing circulation mechanism, and the water is returned to the saline area from the circulating valve;
when salt enters the brine area, the salt inlet valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to enter the salt supplementing circulation mechanism, and then the salt is dissolved in the water sucked from the brine area by the suction valve and is conveyed to the water softener connected with the salt inlet pipeline from the salt inlet valve;
when the saline water area is subjected to sewage discharge, the sewage discharge valve and the second sewage discharge suction valve are opened, and the sewage discharge pump is started to suck sewage in the saline water area from the second sewage discharge suction valve and then discharge the sewage from the sewage discharge valve;
when the line is swept for the saline water area, the salt inlet valve is firstly opened to convey water from the water softener to the salt supplementing circulating mechanism, and then the suction valve and the circulating valve are sequentially opened to clean the salt inlet pipeline and the circulating pipeline of the salt supplementing circulating mechanism.
The technical scheme of the invention has the following beneficial effects: the technical scheme provides an oil field integrated circulation regeneration device and method, the device is light, ingenious, reliable and complete in function, can be widely popularized and applied to oil field steam injection stations, improves the high efficiency of oil field steam injection specialized equipment, reduces labor intensity of workers and safety risk points, and has remarkable practicability.
Drawings
FIG. 1 is a diagram of a piping connection configuration according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a salt replenishment circulation mechanism according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a salt supplementing circulating mechanism, a sewage discharging and cleaning mechanism, a sewage area and a saline area according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is made with reference to the accompanying drawings and specific embodiments.
Specifically, as shown in fig. 1 to 3, the oilfield integrated circulation and regeneration device according to the embodiment of the present invention includes a sewage area 200 and a brine area 100, which are integrated and separated from each other, and further includes a salt supplementing circulation mechanism and a blowdown and cleaning mechanism;
wherein the salt supplementing circulating mechanism comprises: the salt feeding device comprises a salt feeding valve 1, a circulating valve 2, a suction valve 3 and a salt pump 10; the system also comprises a salt inlet pipeline and a circulating pipeline which are connected in parallel, wherein the circulating valve 2 is arranged on the salt inlet pipeline, the suction valve 3 and the salt pump 10 are arranged on the circulating pipeline, and the circulating pipeline and the salt inlet pipeline are connected in parallel and then connected in series with the salt inlet valve 1; the salt pump 10 is arranged between the suction valve 3 and the salt inlet valve 1;
wherein the blowdown wiper mechanism includes: a first sewage draining suction valve 4, a sewage draining valve 5, a cleaning valve 6, a second sewage draining suction valve 7 and a sewage draining pump 20; the sewage treatment device also comprises a sewage discharge pipeline and a cleaning pipeline which are connected in parallel, wherein the sewage discharge pipeline comprises a second sewage discharge suction valve 7, a first sewage discharge suction valve 4 and a sewage discharge pump 20, and the pipeline provided with the second sewage discharge suction valve 7 and the pipeline provided with the first sewage discharge suction valve 4 are connected in parallel and then are connected in series with the sewage discharge pump 20; a cleaning valve 6 is arranged on the cleaning pipeline; the blowdown pipeline and the cleaning pipeline are connected in parallel and then connected in series with a blowdown valve 5; the sewage discharge pipeline and the cleaning pipeline are connected into the saline water area;
when water is added into the saline water area, the salt inlet valve 1, the circulating valve 2 and the salt pump 10 are opened, so that the salt pump 10 drives salt to enter the salt supplementing circulating mechanism from the salt inlet valve 1, and water in the water softener enters the salt supplementing circulating mechanism from the salt inlet valve 1; the water and the salt are mixed and dissolved in the salt supplementing circulating mechanism and then enter a salt water area from the circulating valve 2;
when the self-circulation is carried out on the saline area, the circulating valve 2, the suction valve 3 and the salt pump 10 are opened, so that the salt pump 10 drives the salt to dissolve in the water sucked from the saline area by the suction valve 3 after entering the salt supplementing circulating mechanism and return to the saline area from the circulating valve 2;
when salt is fed into the saline area, the salt inlet valve 1, the suction valve 3 and the salt pump 10 are opened, so that after the salt pump 10 drives the salt to enter the salt supplementing circulation mechanism, the salt is dissolved in the water sucked from the saline area by the suction valve 3 and is conveyed to a water softener connected with a salt inlet pipeline from the salt inlet valve 1;
when sewage drainage is carried out on the saline water area, the sewage drainage valve 5 and the second sewage drainage suction valve 7 are opened, and the sewage drainage pump 20 is started to drain the sewage in the saline water area from the sewage drainage valve 5 after the sewage is sucked from the second sewage drainage suction valve 7;
when the line is swept for the saline water area, the salt inlet valve 1 is firstly opened to send water from the water softener to the salt supplementing circulating mechanism, and then the suction valve 3 and the circulating valve 2 are sequentially opened to clean the salt inlet pipeline and the circulating pipeline of the salt supplementing circulating mechanism.
Wherein the saline water area is divided into a clear layer 110, a circulating layer 120, a salt accumulation layer 130 and a dirty layer 140 from top to bottom; wherein the circulation pipe is disposed between the clear layer 110 and the circulation layer 120; the salt inlet pipeline is arranged between the circulating layer 120 and the salt accumulation layer 130, and one side of the salt inlet pipeline facing the circulating layer 120 is provided with openings distributed along the axial direction of the salt inlet pipeline; the pipeline of the first blowdown suction valve 4 is arranged between the salt deposit layer 130 and the dirt layer 140, and the side, facing the salt deposit layer 130, of the pipeline of the first blowdown suction valve 4 is provided with openings distributed along the axial direction of the cleaning pipeline; wherein the cleaning pipeline extends into the dirty layer 140, and the pipeline provided with the second blowdown suction valve 7 also extends into the dirty layer 140 and is arranged below the cleaning pipeline.
Wherein the bottom of the sewage area 200 is communicated with the sewage layer 140 at the bottom of the saline area through a pipeline.
As shown in fig. 2, the oilfield integrated circulation and regeneration device is further provided with a sampling device 8, and the sampling device 8 is connected with the salt inlet pipeline and the circulation pipeline and is connected with the salt valve 1. As shown in fig. 2, the sampling device 8 is arranged between the salt pump 10 and the salt inlet valve 1.
Meanwhile, the embodiment of the invention also provides an oilfield integrated circulation regeneration method by using the oilfield integrated circulation regeneration device, which comprises the following steps:
when water is added into the saline water area, the salt inlet valve, the circulating valve and the salt pump are opened, so that the salt pump drives salt to enter the salt supplementing circulating mechanism from the salt inlet pump, and water in the water softener enters the salt supplementing circulating mechanism from the salt inlet valve; after the water and the salt are mixed and dissolved in the salt supplementing circulating mechanism, the water and the salt enter a salt water area from a circulating valve;
when the self-circulation is carried out on the saline area, the circulating valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to dissolve in the water sucked from the saline area by the suction valve after entering the salt supplementing circulation mechanism, and the water is returned to the saline area from the circulating valve;
when salt enters the brine area, the salt inlet valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to enter the salt supplementing circulation mechanism, and then the salt is dissolved in the water sucked from the brine area by the suction valve and is conveyed to the water softener connected with the salt inlet pipeline from the salt inlet valve;
when the saline water area is subjected to sewage discharge, the sewage discharge valve and the second sewage discharge suction valve are opened, and the sewage discharge pump is started to suck sewage in the saline water area from the second sewage discharge suction valve and then discharge the sewage from the sewage discharge valve;
when the line is swept for the saline water area, the salt inlet valve is firstly opened to convey water from the water softener to the salt supplementing circulating mechanism, and then the suction valve and the circulating valve are sequentially opened to clean the salt inlet pipeline and the circulating pipeline of the salt supplementing circulating mechanism.
The original brine system and the sewage system in the prior art are designed in a split mode, and the main functions of the salt pond equipment in the brine system only comprise 2 functions of salt feeding and circulating. The sewage disposal pool of the sewage disposal system only has a single sewage disposal function. The embodiment of the invention provides an oil field integrated circulation regeneration device as shown in figures 1-3, which integrates and regenerates functions of a brine system and a sewage system, adds 4 operations of water, cleaning, line sweeping, sewage discharging and the like on the basis of completing functions of salt feeding and circulating sewage discharging by adjusting a common flow, a pipeline and a valve, and automatically completes the whole process through program design.
The oil field integrated cycle regeneration device provided by the embodiment of the invention has the working process that:
water adding function: and (3) opening a salt inlet valve (valve No. 1) and a circulating valve (valve No. 2), and reversely feeding water from the outlet of the water softener by utilizing a salt inlet flow and a circulating/water feeding flow to realize the water adding and dissolving process of the salt pond.
The circulation function is as follows: opening suction valve (No. 3 valve) and circulating valve (No. 2 valve), starting the salt pump, realizing salt pond automatic cycle, accelerating salt particle dissolution:
the salt feeding function is as follows: and opening a suction valve (No. 3 valve) and a salt inlet valve (No. 1 valve), starting a salt pump, sucking the qualified concentration salt water from the clear layer, and entering the water softener resin tank through a salt inlet flow path.
The cleaning function is as follows: and opening a sewage suction valve (No. 4 valve) and a cleaning valve (No. 6 valve), and starting a sewage pump to flush a sewage layer at the bottom of the salt pond.
The sewage discharge function: and opening a blow-down valve (No. 5 valve) and a blow-down valve suction valve (No. 7 valve), and starting a blow-down pump to discharge impurities in a salt pond dirty layer.
The line sweeping function: and (3) opening a salt inlet valve (valve No. 1), reversely delivering water-treated softened water to the front end of the salt pond, sequentially opening a suction valve (valve No. 3) and a circulating water adding valve (valve No. 2) in sequence, and sweeping the line of the process of storing the salt water.
The layout structure of the integrated circulation and regeneration device for oil field according to the embodiment of the present invention is shown in fig. 2, and the salt route of the brine area 100 is hierarchically arranged from the bottom layer to the upper layer, i.e., the circulation flow (flow 21) and the suction flow (flow 31). The sewage discharge part is distributed into a sewage discharge suction flow (flow 71), a salt pond cleaning flow (flow 61) and a sewage discharge area flow (flow 41) from bottom to top in the salt pond. Under the effects of a pollution discharge process and a salt path process, the layering of a saline water area is realized. As shown in fig. 3, in the integrated circulation and regeneration apparatus for an oil field according to the embodiment of the present invention, the saline water region 100 includes a dirty layer 140, a salt deposit layer 130, a circulation layer 120, and a clear layer 110 in this order from bottom to top.
The part below the dirty layer and the cleaning process (process 61) is the dirty layer which is mainly used for storing impurities such as soil, sand and the like contained after the granular salt is dissolved and preventing the impurities from being sucked into the process, the pump shell, the filter and the resin tank to cause the damage of the equipment. The cleaning flows (flows 61) are laid on two sides of the bottom layer of the salt pond, the pipe wall of the salt pond adopts a laser slotting mode, the slotting is horizontally and transversely arranged in a staggered mode, the overflowing area is determined according to the pump cleaning flow and the pipeline on-way pressure drop, the outflow flow and the pressure of each slotting reach the design requirements, the cleaning water enters the middle of the salt pond through the staggered slotting, regional rotational flows are formed in the middle region, and the cleaning effect of bottom dirt is improved.
And (4) a salt deposit layer. The interval above the cleaning flow (flow 41) and below the circulation/water addition flow (flow 21) is a salt deposit layer. This layer serves to store undissolved salt particles and also serves as a brine high concentration layer. In the water adding process, softened water is reversely input through a salt inlet/water adding flow (flow 11), enters a salt deposit layer through a valve 1 and a valve 2 and a circulating/water adding flow (flow 21), and impacts salt particles to two sides in a positive pressure mode through horizontal honeycomb-shaped jet holes to realize a primary dissolving process.
And (4) circulating the layer. The circulation layer is above the circulation/water addition flow (flow 21) and below the suction flow (flow 31). This layer was used to store saline of acceptable concentration and was used as the intake layer. After the cycle begins, the clear layer brine passes through flow path 31, through valve 3, valve 2, flow path 21 into the circulating layer. The layer is strong in disturbance, a honeycomb hole positive pressure two-side horizontal jet flow mode is adopted, flow state between layers is changed, the mass transfer process is enhanced, the salt water concentration of a circulating layer can meet the requirement quickly, and the layer is a main particle salt dissolving layer.
A clear layer. The clear layer is above the aspiration flow (flow 31) and below the sampling observation flow (flow 81). This layer stores a brine layer of acceptable concentration with minimal impurities. After the salt feeding is started, the qualified brine enters the water softener through the flow 31, the valve 3, the salt pump, the valve 1 and the flow 11. The lifting design of the suction flow 31 changes the mode of 'low inlet and high outlet' into 'high inlet and low outlet', which not only solves the problem of controlling the brine concentration, but also eliminates the damage of impurities in a dirty layer to the subsequent flow, equipment and pump.
The embodiment of the invention can adopt automatic control to complete the functions and the processes. The method specifically comprises the following steps:
and (5) electrically reforming. The original salt pond and the pollution discharge pond are controlled by adopting a corrosion-resistant manual ball valve, an electromagnetic valve and a pneumatic valve, and after being transformed, all the processes of the device are transformed into a 24V electric valve again.
And (4) automatic switching. All the function realizing processes are judged and controlled automatically by using an automatic control program, and the whole process can be finished automatically only by setting switching logic and time without manual intervention.
And (6) visual verification. Through setting up sample observation flow 81, set up check out test set such as manometer, conductivity meter at the sample viewing aperture. And in the processes of circulation, salt feeding and line sweeping, the pressure observation point and the conductivity observation point are used as the judgment basis for the proceeding or termination of the processes.
And pressure gauges are arranged in front of and behind the No. 5 valve in the sewage discharge process and used as differential pressure indication. When the sewage pump is started, the pressure meters in front and at the back of the valve are observed, when the pressure of the outlet of the pump reaches a set value, the No. 5 valve is opened after 3 seconds of delay, and the sewage discharge operation is carried out 51. And after the sewage discharge is finished, the No. 5 valve is turned off, the flow is automatically decompressed, and the judgment is carried out according to the front and back pressure difference values. When the dredge pump fails and does not start pressure or is close to the single well pipeline check valve and fails, the two pressure gauges generate a large pressure difference value and can process the pressure difference value according to actual conditions.
The embodiment of the invention is suitable for the water treatment system of the steam injection station for the field activity of the oil field, and has the advantages of simplicity, flexibility, easiness in installation, convenience in transportation, function integration, high automation degree, easiness in operation, less safety risk and the like. In the oil field integrated circulation regeneration device provided by the embodiment of the invention, actual production experiments are carried out. In the Huasheng electric industry processing production of the Shengli oil field, 6 automatic functions of salt pond water adding, salt pond circulating, automatic salt feeding, automatic cleaning, automatic pollution discharging and automatic line sweeping are all realized, and the flow tightness, the explosion-proof performance, the reliability and the safety performance all reach the standard requirements. The device light in weight, small can use in arbitrary steam injection station water treatment corollary equipment, and technical performance is reliable, has alleviateed on-the-spot intensity of labour and safe risk, and labor efficiency promotes by a wide margin, and is economical convenient.
According to the embodiment of the invention, an integrated, automatic, simple, portable, safe, efficient and complete-function integrated cyclic regeneration device is designed under the condition that construction requirements need to be met or in order to improve the working efficiency, so that the flexibility and the maneuverability of oil field steam injection specialized equipment are improved, the labor intensity of workers is reduced, intelligent operation is realized, safety risk points are reduced, the production efficiency is improved, and the production cost investment of a system is greatly reduced. The embodiment of the invention realizes simple and convenient automatic function by a skillful framework and function integration and arrangement of process optimization. The appearance framework, the integrated function and the automatic operation are perfected, so that the convenience, flexibility, safety and design concept are improved. The cleaning process of the salt pond system adopts two pipelines arranged at equal high level, the inner sides of the two pipelines are staggered in pairs at equal intervals, and the laser slotting process is designed, so that a bottom water net flow surface is formed in the cleaning process, and a unique cleaning effect is achieved. The salt inlet flow of the salt water system is designed to be 'high inlet', the salt liquid pumped by the salt pump is always a high-concentration clear layer, the design concept greatly improves the regeneration effect and shortens the regeneration time. The circulation flow of the brine system is designed to be high in and low out, so that the 'high' extraction of liquid is clean, the cleaning is realized, the flow is not blocked, the bottom is pressed by a pump pressure, the salt dissolving rate is improved and the circulation effect is improved by adopting a single-tube double-sided laser slit-pricking hydrated salt.
The embodiment of the invention realizes the function that the salt pump and the sewage pump on the circulating system are mutually standby. The logic design and the PLC program realization function are applicable to the unique design concept of the equipment.
The technological parameter requirements are as follows:
1. all valves are connected in a flange mode by electric valves.
2. All the processes and the pump body are installed and designed into an integral detachable platform.
3. The salt feeding process adopts 11/2 stainless steel pipes, and the sewage disposal process adopts 21/2 common steel pipes.
4. The specific dimensions are length (10.6m) x width (2m) x height (2 m).
5. The flow sampling, monitoring and control valve is fully automatic.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. An integrated circulation regeneration device for an oil field is characterized by comprising a sewage area and a brine area which are integrated and separated from each other, a salt supplementing circulation mechanism and a pollution discharge cleaning mechanism;
wherein the salt supplementing circulating mechanism comprises: a salt inlet valve, a circulating valve, a suction valve and a salt pump; the salt-removing device also comprises a salt inlet pipeline and a circulating pipeline which are mutually connected in parallel, wherein the circulating valve is arranged on the salt inlet pipeline, the suction valve and the salt pump are arranged on the circulating pipeline, and the circulating pipeline and the salt inlet pipeline are connected in parallel and then are connected in series with the salt inlet valve; the salt pump is arranged between the suction valve and the salt inlet valve;
wherein the blowdown wiper mechanism includes: the sewage treatment device comprises a first sewage draining suction valve, a sewage draining valve, a cleaning valve, a second sewage draining suction valve and a sewage draining pump; the sewage treatment device also comprises a sewage discharge pipeline and a cleaning pipeline which are connected in parallel, wherein the sewage discharge pipeline comprises a second sewage discharge suction valve, a first sewage discharge suction valve and a sewage discharge pump, and the pipeline provided with the second sewage discharge suction valve and the pipeline provided with the first sewage discharge suction valve are connected in parallel and then are connected in series with the sewage discharge pump; a cleaning valve is arranged on the cleaning pipeline; the blowdown pipeline and the cleaning pipeline are connected in parallel and then connected in series with a blowdown valve; the sewage discharge pipeline and the cleaning pipeline are connected into the saline water area;
when water is added into the saline water area, the salt inlet valve, the circulating valve and the salt pump are opened, so that the salt pump drives salt to enter the salt supplementing circulating mechanism from the salt inlet valve, and water in the water softener enters the salt supplementing circulating mechanism from the salt inlet valve; after the water and the salt are mixed and dissolved in the salt supplementing circulating mechanism, the water and the salt enter a salt water area from a circulating valve;
when the self-circulation is carried out on the brine area, the circulating valve, the suction valve and the salt pump are opened, so that after the salt pump drives salt to enter the salt supplementing circulating mechanism, the salt is dissolved in water sucked from the brine area by the suction valve and returns to the brine area from the circulating valve;
when salt enters the brine area, the salt inlet valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to enter the salt supplementing circulation mechanism, and then the salt is dissolved in the water sucked from the brine area by the suction valve and is conveyed to the water softener connected with the salt inlet pipeline from the salt inlet valve;
when the saline water area is subjected to sewage discharge, the sewage discharge valve and the second sewage discharge suction valve are opened, and the sewage discharge pump is started to suck sewage in the saline water area from the second sewage discharge suction valve and then discharge the sewage from the sewage discharge valve;
when the line is swept for the saline water area, firstly, the salt inlet valve is opened to send water from the water softener to the salt supplementing circulating mechanism, and then the suction valve and the circulating valve are sequentially opened to clean the salt inlet pipeline and the circulating pipeline of the salt supplementing circulating mechanism;
wherein the saline water area is divided into a clear layer, a circulating layer, a salt accumulation layer and a dirty layer from top to bottom; wherein the circulation pipeline is arranged between the clear layer and the circulation layer; the salt inlet pipeline is arranged between the circulating layer and the salt accumulation layer, and one side, facing the circulating layer, of the salt inlet pipeline is provided with openings distributed along the axial direction of the salt inlet pipeline; the pipeline of the first sewage draining suction valve is arranged between the salt deposit layer and the sewage layer, and one side, facing the salt deposit layer, of the pipeline of the first sewage draining suction valve is provided with openings distributed along the axial direction of the cleaning pipeline; wherein the cleaning pipeline extends into the dirty layer, and the pipeline provided with the second blowdown suction valve also extends into the dirty layer and is arranged below the cleaning pipeline.
2. The oilfield integrated circulation and regeneration device of claim 1, wherein the bottom of the sewage area is in communication with a fouling layer at the bottom of the brine area through a pipeline.
3. The oilfield integrated circulation and regeneration device of claim 1, wherein the blowdown valve is provided with a pressure gauge at the front end and a pressure gauge at the rear end respectively.
4. A method of integrated oilfield cyclic regeneration using the integrated oilfield cyclic regeneration apparatus of any one of claims 1-3, comprising:
when water is added into the saline water area, the salt inlet valve, the circulating valve and the salt pump are opened, so that the salt pump drives salt to enter the salt supplementing circulating mechanism from the salt inlet valve, and water in the water softener enters the salt supplementing circulating mechanism from the salt inlet valve; after the water and the salt are mixed and dissolved in the salt supplementing circulating mechanism, the water and the salt enter a salt water area from a circulating valve;
when the self-circulation is carried out on the brine area, the circulating valve, the suction valve and the salt pump are opened, so that after the salt pump drives salt to enter the salt supplementing circulating mechanism, the salt is dissolved in water sucked from the brine area by the suction valve and returns to the brine area from the circulating valve;
when salt enters the brine area, the salt inlet valve, the suction valve and the salt pump are opened, so that the salt pump drives the salt to enter the salt supplementing circulation mechanism, and then the salt is dissolved in the water sucked from the brine area by the suction valve and is conveyed to the water softener connected with the salt inlet pipeline from the salt inlet valve;
when the saline water area is subjected to sewage discharge, the sewage discharge valve and the second sewage discharge suction valve are opened, and the sewage discharge pump is started to suck sewage in the saline water area from the second sewage discharge suction valve and then discharge the sewage from the sewage discharge valve;
when the line is swept for the saline water area, the salt inlet valve is firstly opened to convey water from the water softener to the salt supplementing circulating mechanism, and then the suction valve and the circulating valve are sequentially opened to clean the salt inlet pipeline and the circulating pipeline of the salt supplementing circulating mechanism.
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