CN113636669A - An oilfield reinjection water treatment system - Google Patents

An oilfield reinjection water treatment system Download PDF

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Publication number
CN113636669A
CN113636669A CN202111039318.7A CN202111039318A CN113636669A CN 113636669 A CN113636669 A CN 113636669A CN 202111039318 A CN202111039318 A CN 202111039318A CN 113636669 A CN113636669 A CN 113636669A
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electromagnetic valve
way electromagnetic
water tank
end channel
stage
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陈林飞
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Zhejiang Xinrui Environmental Protection Technology Co ltd
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Zhejiang Xinrui Environmental Protection Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209—Regulation methods for flocculation or precipitation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

本发明公开了一种油田回注水处理系统，包括入水管，其特征是包括通过管道连接的原水水箱，入水管设置在原水水箱的顶部，通过存放从入水管流入的污水，砂滤桶，其进端与原水水箱的出端通过一个粗滤泵进行连接，用于对原水水箱内的水进行碳滤，碳滤桶，其进端与碳滤桶的出端连接，用于对从碳滤桶流出的水进行滤砂，粗滤水箱，其顶部通过管道与砂滤桶进行连接，用于对经砂滤的水进行暂存，多级过滤系统，多级过滤系统的进端与粗滤水箱的出端连接，对粗滤水箱中的水进行过滤；浓水水箱，浓水水箱设置在原水水箱的一侧，多级过滤系统中设置有与浓水水箱连通的管道。

Figure 202111039318

The invention discloses an oil field re-injection water treatment system, comprising a water inlet pipe, which is characterized by comprising a raw water tank connected by pipes, the water inlet pipe is arranged on the top of the raw water tank, and the sand filter barrel is stored by storing the sewage flowing in from the water inlet pipe. The inlet end is connected with the outlet end of the raw water tank through a coarse filter pump, which is used to carbon filter the water in the raw water tank. The water flowing out of the barrel is filtered for sand, and the water tank for rough filtering is connected with the sand filter barrel through a pipeline at the top, which is used for temporary storage of the water filtered by the sand. The outlet of the water tank is connected to filter the water in the coarse filter water tank; the concentrated water tank is arranged on one side of the raw water tank, and the multi-stage filtration system is provided with a pipeline that communicates with the concentrated water tank.

Figure 202111039318

Description

Oil field reinjection water processing system
Technical Field
The invention belongs to the technical field of oilfield reinjection water treatment, and particularly relates to an oilfield reinjection water treatment system.
Background
The method can reduce the loss of water environment resources, and can be repeatedly used after treatment, so that the pollution to the surrounding ecological environment can be reduced, and the oil field reinjection water can be utilized to improve the oil outlet efficiency aiming at different geological conditions, so that the oil field reinjection water can be repeatedly used after treatment, and the reinjection water to an underground oil layer is the most main treatment mode of the current oil field. However, the filtering effect of the filtering system of the existing oilfield reinjection water is not good, for example, the structure of the processing device is simple, the filtering device cannot be cleaned, and the processing effect is not ideal, as the processing device of the oilfield reinjection water with the publication number of CN213537587U in the grant of the patent of the utility model in china.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the oilfield reinjection water treatment system which is simple in structure and ideal in treatment effect.
In order to achieve the purpose, the invention provides the following technical scheme: the oilfield reinjection water treatment system comprises a water inlet pipe and is characterized by comprising a water inlet pipe and a water outlet pipe which are connected through a pipeline
A raw water tank, an inlet pipe is arranged at the top of the raw water tank, and by storing sewage flowing in from the inlet pipe,
the inlet end of the sand filter barrel is connected with the outlet end of the raw water tank through a coarse filter pump and is used for filtering carbon in the raw water tank,
a carbon filter barrel, the inlet end of which is connected with the outlet end of the carbon filter barrel and is used for filtering sand of water flowing out of the carbon filter barrel,
a coarse filtration water tank, the top of which is connected with the sand filtration barrel through a pipeline and is used for temporarily storing the sand-filtered water,
the inlet end of the multi-stage filtering system is connected with the outlet end of the rough filtering water tank to filter water in the rough filtering water tank;
the concentrated water tank is arranged on one side of the raw water tank, and a pipeline communicated with the concentrated water tank is arranged in the multi-stage filtration system.
The oilfield reinjection water is injected into the raw water tank through the water inlet pipe, the rough filtration pump is started to work after the liquid in the raw water tank rises to a certain height, the oil enters the rough filtration water tank through the sand filtration barrel (for filtering silt in raw water) and the carbon filtration barrel (for filtering organic matters in raw water), and the rough filtration pump is closed when the water in the raw water tank is reduced to a certain liquid level.
The invention is further configured to: the multistage filtering system comprises
A concentrated water return pipe for returning the concentrated water filtered by the multi-stage filtering system, one end of the concentrated water return pipe is connected with the concentrated water tank,
the silicon carbide ceramic ultrafiltration membrane group is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, wherein the upper end channel of the silicon carbide ceramic ultrafiltration membrane group is provided with a three-way electromagnetic valve I, the upper side end channel is provided with a second two-way electromagnetic valve, the lower end channel is provided with a fourth two-way electromagnetic valve, the lower side end channel is provided with a fifth two-way electromagnetic valve, the three-way electromagnetic valve I is upwards opened and communicated with the upper end channel and a concentrated water return pipe, the three-way electromagnetic valve I is downwards opened and communicated with the upper end channel and the outlet end of a coarse filtration water tank, an ultrafiltration membrane group filter pump is arranged on a pipeline connected with the three-way electromagnetic valve I, the three-way electromagnetic valve I is upwards opened and connected with the upper end channel and the concentrated water return pipe, and the fourth two-way electromagnetic valve is connected with the lower end channel and the concentrated water return pipe through a pipeline,
the top of the ultrafiltration water tank is connected with the second two-way electromagnetic valve through a pipeline and is used for temporarily storing water filtered by the silicon carbide ceramic ultrafiltration membrane group, the bottom of one side of the ultrafiltration water tank is connected with the fifth two-way electromagnetic valve through a pipeline, and a silicon carbide ceramic membrane backwashing pump is arranged between the fifth two-way electromagnetic valve and the ultrafiltration water tank;
the first-stage nanofiltration membrane group is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, a three-way electromagnetic valve II is arranged on the upper side end channel, a sixth two-way electromagnetic valve is arranged on the upper end channel, a seventh two-way electromagnetic valve is arranged on the lower side end channel, an eighth two-way electromagnetic valve is arranged on the lower end channel, a first-stage nanofiltration membrane filter pump is arranged on a pipeline which is connected with the upper side end channel and the bottom of the other side of the ultrafiltration water tank and is arranged below the three-way electromagnetic valve II, the upper side end channel is connected with a concentrated water return pipe,
and the top of the first-stage nanofiltration water tank is connected with the outlet end of a seventh two-way electromagnetic valve of a lower side end channel of the first-stage nanofiltration membrane group through a pipeline and is used for temporarily storing the concentrated water discharged from the first-stage nanofiltration membrane group.
After the liquid level in the coarse water filtration tank rises to a certain height, a filter pump of an ultrafiltration membrane group is started to work, a coarse water filtration three-way electromagnetic valve I is opened downwards to enter a silicon carbide ceramic ultrafiltration membrane group, produced water enters an ultrafiltration water tank through a second two-way electromagnetic valve, concentrated water flows back to a concentrated water tank through a concentrated water return pipe through a fourth two-way electromagnetic valve, and at the moment, a third two-way electromagnetic valve is closed and a fifth two-way electromagnetic valve is closed;
when the liquid level reached by the ultrafiltration water tank rises to a certain height, the primary nanofiltration membrane filter pump is started to work, the three-way electromagnetic valve II is opened downwards, produced water enters the secondary nanofiltration water tank through the sixth two-way electromagnetic valve, concentrated water enters the primary nanofiltration water tank through the seventh two-way electromagnetic valve, and at the moment, the three-way electromagnetic valve II is opened downwards, the sixth two-way electromagnetic valve is opened, the seventh two-way electromagnetic valve is opened, and the eighth two-way electromagnetic valve is closed.
The invention is further configured to: the multistage filtering system comprises
The second-stage nanofiltration membrane group is provided with an upper side end channel, an upper side end channel and a lower side end channel, the upper side end channel is provided with a three-way electromagnetic valve III, the upper side end channel is provided with a ninth two-way electromagnetic valve, the lower side end channel is provided with a twelfth two-way electromagnetic valve, the lower side end channel is provided with an eleventh two-way electromagnetic valve, the three-way electromagnetic valve III is opened downwards and connected with the upper side end channel and the outlet end of the first-stage nanofiltration water tank, a second-stage nanofiltration membrane filter pump is arranged on a pipeline connected with the upper side end channel and the outlet end of the first-stage nanofiltration water tank, the three-way electromagnetic valve III is opened and connected with the upper side end channel and a concentrated water return pipe, and the twelfth two-way electromagnetic valve on the lower side end channel is connected with the concentrated water return pipe through a pipeline,
the top of the secondary nanofiltration water tank is respectively connected with a ninth two-way electromagnetic valve of a channel at the upper end of the secondary nanofiltration membrane group and a sixth two-way electromagnetic valve of a channel at the upper end of the primary nanofiltration membrane group through pipelines,
one side of the bottom of the second-stage nanofiltration water tank is respectively connected with an eighth two-way electromagnetic valve and an eleventh two-way electromagnetic valve through pipelines, a first-stage nanofiltration membrane backwashing pump is arranged on the pipeline connected with the eighth two-way electromagnetic valve, and a second-stage nanofiltration membrane backwashing pump is arranged on the pipeline connected with the eleventh two-way electromagnetic valve;
the first-stage RO filtering membrane group is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, a three-way electromagnetic valve IV is arranged on the upper side end channel, a twelfth two-way electromagnetic valve is arranged on the upper end channel, a thirteenth two-way electromagnetic valve is arranged on the lower side end channel, a fourteenth two-way electromagnetic valve is arranged on the lower end channel, the three-way electromagnetic valve IV is arranged below and connected with the upper side end channel and the bottom of the other side of the second-stage nanofiltration water tank, a first-stage RO membrane filtering pump is arranged on a pipeline connected with the upper side end channel and the bottom of the other side of the second-stage nanofiltration water tank, the three-way electromagnetic valve IV is arranged above and connected with the upper side end channel and a concentrated water return pipe,
and the top of the first-level RO water tank is connected with a thirteenth two-way electromagnetic valve of a lower side end channel of the first-level RO filtering membrane group through a pipeline and is used for temporarily storing the concentrated water flowing out of the first-level RO filtering membrane group.
The invention is further configured to: also comprises
The two-stage RO filter membrane group is provided with an upper side end channel, a lower side end channel and a lower end channel, wherein the upper side end channel is provided with a three-way electromagnetic valve V, the upper side end channel is provided with a fifteenth two-way electromagnetic valve, the lower side end channel is provided with a sixteenth two-way electromagnetic valve, the lower side end channel is provided with a seventeenth two-way electromagnetic valve, the three-way electromagnetic valve V is connected with the upper side end channel and the bottom of the other side of the first-stage RO water tank by a two-stage RO membrane filter pump arranged on a pipeline connected with the two-stage RO filter pump and used for filtering concentrated water in the first-stage RO water tank, the lower side end channel is connected with a concentrated water return pipe, and the sixteenth two-way electromagnetic valve is connected with the concentrated water return pipe used for the lower side end,
the top of the pure water box is connected with a fifteenth two-way electromagnetic valve of the upper end channel of the second-level RO filtering membrane group and a twelfth two-way electromagnetic valve of the upper end channel of the first-level RO filtering membrane group through pipelines and is used for storing water filtered by the second-level RO filtering membrane group and the first-level RO filtering membrane group, and the bottom of the pure water box is provided with a sterilizing lamp.
One side of the bottom of one side of the pure water tank is connected with a fourteenth two-way electromagnetic valve and a seventeenth two-way electromagnetic valve through pipelines respectively, a first-stage RO backwashing pump is arranged on the pipeline connected with the fourteenth two-way electromagnetic valve, and a second-stage RO backwashing pump is arranged on the pipeline connected with the seventeenth two-way electromagnetic valve.
When the liquid level in the first-stage nanofiltration water tank rises to a certain height, the second-stage nanofiltration membrane filter pump is started to work, the three-way electromagnetic valve III is opened downwards, produced water enters the second-stage nanofiltration water tank through the ninth two-way electromagnetic valve, concentrated water enters the concentrated water return pipe through the twelfth electromagnetic valve and flows back to the concentrated water tank, and when the three-way electromagnetic valve III is opened downwards, the ninth two-way electromagnetic valve is opened, the twelfth electromagnetic valve is opened, and the eleventh two-way electromagnetic valve is closed. The secondary nanofiltration membrane filters water from concentrated water generated by the primary nanofiltration membrane, so that the nanofiltration water yield is improved, the concentration of the nanofiltration concentrated water is improved, and calcium, magnesium, iron and other ions are conveniently separated out in the subsequent flocculation mud pressing procedure;
and when the liquid level in the secondary nanofiltration tank rises to a certain height, the primary RO filter pump is started to work. Filtered water enters a first-stage RO filtering membrane through the lower opening of a three-way electromagnetic valve IV, produced water enters a pure water tank through a twelfth two-way electromagnetic valve, a thirteenth two-way automatic pressure regulating valve of concentrated water enters a second-stage RO water tank, the twelfth two-way electromagnetic valve is opened, the fourteenth two-way electromagnetic valve is closed and the thirteenth two-way electromagnetic valve is opened when the three-way electromagnetic valve IV is opened;
and when the liquid level in the primary RO water tank rises to a certain height, the secondary RO filter pump is started to work. The filtered water enters the second-stage RO filtering membrane group through the lower opening of the three-way electromagnetic valve V, the produced water enters the pure water tank through the fifteenth two-way electromagnetic valve, the concentrated water flows back to the concentrated water tank through the concentrated water return pipe through the sixteenth two-way electromagnetic valve, when the three-way electromagnetic valve V is opened, the fifteenth two-way electromagnetic valve is opened, the seventeenth two-way electromagnetic valve is closed, and the sixteenth two-way electromagnetic valve is opened, the second-stage RO filtering membrane group filters the concentrated water produced by the water from the first-stage RO filtering membrane group, the water yield of the RO membrane is improved, the concentration of the RO concentrated water is improved, and the separation of ions such as calcium, magnesium, iron and the like in the subsequent flocculation mud-pressing process is facilitated.
Carrying out positive washing on the silicon carbide ceramic ultrafiltration membrane or filtering a rough filtering water tank: when the normal filtration of the ceramic ultrafiltration membrane is performed for a set time, a filtration pump of an ultrafiltration membrane group is started, a three-way electromagnetic valve I is opened, a second two-way electromagnetic valve is closed, a fourth two-way electromagnetic valve is opened and closed, and a fifth two-way electromagnetic valve is opened;
backwashing the silicon carbide ceramic ultrafiltration membrane: when the normal filtration of the ceramic ultrafiltration membrane is started to a set time, a backwashing pump of the ceramic ultrafiltration membrane group is started, a three-way electromagnetic valve I is opened upwards, a second two-way electromagnetic valve is closed, a fourth two-way electromagnetic valve is closed, and a fifth two-way electromagnetic valve is opened;
and (3) forward washing of a first-stage nanofiltration membrane group: when the first-stage nanofiltration membrane group normally filters and runs for a set time, the first-stage nanofiltration membrane filter pump is started, the three-way electromagnetic valve II is opened, the sixth two-way electromagnetic valve is closed, the seventh two-way electromagnetic valve is moved, the eighth two-way electromagnetic valve is closed, and the full-flow operation is used for performing normal washing on the first-stage nanofiltration membrane group or filtering on the ultrafiltration water tank;
backwashing the primary nanofiltration membrane group: when the first-stage nanofiltration membrane group normally filters and runs for a set time, a first-stage nanofiltration membrane backwashing pump is started, a three-way electromagnetic valve II is opened, a sixth two-way electromagnetic valve is closed, a seventh two-way electromagnetic valve is closed, an eighth two-way electromagnetic valve is opened, the nanofiltration membranes are reversely cleaned, and cleaning water flows back to a concentrated water tank through a concentrated water return pipe;
and (3) forward washing of a secondary nanofiltration membrane group: when the second-stage nanofiltration membrane group normally filters and runs for a set time, the second-stage nanofiltration membrane filter pump is started, the three-way electromagnetic valve III is opened downwards, the ninth two-way electromagnetic valve is closed, the twelfth automatic valve is opened, the eleventh two-way electromagnetic valve is closed, and the full-flow operation is used for performing normal washing on the second-stage nanofiltration membrane group or filtering on the first-stage nanofiltration water tank;
backwashing the secondary nanofiltration membrane group: when the normal filtration operation of the secondary nanofiltration membrane reaches a set time, a backwashing pump of the secondary nanofiltration membrane is started, a three-way electromagnetic valve III is opened, a ninth two-way electromagnetic valve is closed, a twelfth electromagnetic valve is closed, and an eleventh two-way electromagnetic valve is opened, the nanofiltration membrane is reversely cleaned, and cleaning water flows back to a concentrated water tank through a concentrated water return pipe;
the first-stage RO filtering membrane group is washed: when the normal filtration of the first-stage RO membrane group is carried out for a set time, the first-stage RO membrane filtration pump is started, the three-way electromagnetic valve IV is opened downwards, the twelfth two-way electromagnetic valve is closed, the 4 thirteenth two-way electromagnetic valve is opened, the fourteenth two-way electromagnetic valve is closed, and the full-flow operation is carried out for the normal washing of the first-stage RO membrane group or the filtration of the second-stage nanofiltration water tank;
backwashing a first-stage RO filtering membrane group: when the normal filtration of the first-stage RO membrane is operated for a set time, a first-stage RO membrane backwashing pump is started, a three-way electromagnetic valve IV is opened upwards, a twelfth two-way electromagnetic valve is closed, a thirteenth two-way electromagnetic valve is closed, a fourteenth two-way electromagnetic valve is opened, and the first-stage RO filtration membrane group is reversely cleaned;
and (3) washing a secondary RO filter membrane group: when the second-stage RO filtering membrane group normally filters and runs for a set time, the second-stage RO membrane filtering pump is started, the three-way electromagnetic valve V is opened, the fifteenth two-way electromagnetic valve is closed, the sixteenth two-way electromagnetic valve is opened, the seventeenth two-way electromagnetic valve is closed, and the full-flow operation is used for carrying out forward washing on the second-stage RO filtering membrane component or filtering on the first-stage nanofiltration water tank;
backwashing a second-level RO filter membrane group: when the second-stage RO filter membrane group normally filters and runs for a set time, the second-stage RO backwashing pump opens the three-way electromagnetic valve V to be opened upwards, closes the fifteenth two-way electromagnetic valve, closes the sixteenth automatic pressure regulating valve and opens the seventeenth two-way electromagnetic valve, and the second-stage RO filter membrane group is reversely cleaned;
the bottom of the sterilization and disinfection pure water tank is provided with a UV sterilization lamp, so that the filtered water is sterilized and disinfected, and the purpose that the reuse water in the oil field is sterile is really achieved.
The invention is further configured to: the water inlet pipe is fixedly arranged on one side of the top of the raw water tank, a supporting frame with an L-shaped section is arranged at the upper end of the inner wall of the side where the water inlet pipe of the raw water tank is located, and a filter residue barrel is arranged on the supporting frame.
Thereby can carry out prefiltering to the water that gets into in former water tank through setting up the filter residue section of thick bamboo.
The invention is further configured to: the filter residue section of thick bamboo including the barrel that is the rectangle tube-shape, the bottom of barrel supports the fixed one-level filter screen that is provided with in middle part of barrel on the carriage.
Through adopting foretell technical scheme, set up the cartridge filter, the middle part of cartridge filter is provided with the one-level filter screen to can filter the water that gets into in former water tank.
The invention is further configured to: the middle part of barrel be formed with and support along, the one-level filter screen fix on a fixed frame that is the rectangle, fixed frame settle support along last.
Through adopting foretell technical scheme, the cooperation that sets up fixed frame and support edge can be convenient for the dismantlement and the washing of one-level filter screen.
The invention is further configured to: the bottom of the cylinder body is provided with a metal filter screen, and the inner side of the metal filter screen is covered with high-efficiency filter cotton.
Through adopting foretell technical scheme, can further ensure the filter effect of cartridge filter through metal filters and high-efficient setting of crossing filter pulp.
The invention is further configured to: the metal filter screen is in broken line distribution, and the connecting ribs distributed along the broken line are arranged on the two sides of the metal filter screen, the metal filter screen is welded with the connecting ribs, and the connecting ribs are fixed with the inner wall of the filter residue cylinder through welding.
By adopting the technical scheme, the filtering area can be ensured by arranging the metal filter screens distributed in the broken lines, so that the filtering efficiency is ensured.
The invention is further configured to: a water outlet is formed in the bottom of the other side of the filtering reservoir, a water discharge joint is fixedly arranged on the water outlet, and an eighteenth two-way electromagnetic valve is arranged at the tail end of the water discharge joint; the opposite side of concentrated water tank be provided with the medicine bucket that adds of taking the force (forcing) pump, the force (forcing) pump is connected with the top of concentrated water tank with a medicine tube that adds to be provided with first two solenoid valve in one side bottom of concentrated water tank, two solenoid valve's play end is connected to the end that advances of a pressure filter, pressure filter press one side has the filter-pressing water tank, the last pressure filtration liquid back flow that has of pressure water tank, the bottom of pressure filtration water tank is provided with the elevator pump, the one end and the elevator pump of pressure filtration liquid back flow are connected, the other end and the raw water tank of pressure filtration liquid back flow are connected.
The processing system also comprises a control cabinet arranged outside, and a control circuit and a controller for controlling the forward washing, the electromagnetic valve and the valve action are arranged in the control cabinet. The automatic control of the filtering device and even the whole processing filtering system can be realized by the processing cabinet, thereby being convenient for operation.
The water outlet is integrally formed with a tubular water discharge pipe, the water discharge connector is inserted on the water discharge pipe, and a hexagonal nut is connected to the part of the water discharge connector, which is positioned on the inner side of the water discharge pipe, in a threaded manner.
The installation of the drainage connector can be facilitated by arranging the hexagonal nut.
The drainage connect including the first connecting portion, the accepting portion and the second connecting portion that connect gradually, first connecting portion, accepting portion and second connecting portion decrease progressively step by step, just first connecting portion and second connecting portion on all be provided with the external screw thread, eighteenth two way solenoid valve threaded connection on first connecting portion, hexagonal nut threaded connection on the second connecting portion, accepting portion and drainage connect and be clearance fit, and one side that accepting portion leaned on first connecting portion set up a plurality of evenly distributed's fixed muscle, and the accepting portion on be provided with the sealing member, the inboard of sealing member be provided with the spread groove of fixed muscle looks adaptation.
The sealing performance of the joint connection of the drainage joint can be ensured by arranging the sealing element; through setting up fixed muscle and spread groove to can further ensure the intensity that the sealing member is connected.
A bearing groove which is coaxial with the sealing groove is arranged on the inner side of the sealing element; and a plurality of sealing ribs which are uniformly distributed and coaxially arranged are arranged on the outer side of the sealing element, and the cross section of each sealing rib is arc-shaped.
The sealing rib can further ensure the mechanical strength of the sealing element, and the receiving groove can play a role in providing a certain deformation gap generated by extrusion when the sealing element is installed.
The sealing element is internally provided with an integrally formed reinforcing rib, the section of the reinforcing rib is type, the type opening of the reinforcing rib faces the inner side of the sealing element, and the reinforcing rib is made of elastic metal.
The structural strength of the sealing element can be ensured by arranging the reinforcing ribs, so that the practicability of the sealing element is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure of a raw water tank in the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is an enlarged view of the structure of the pure water tank of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at I;
FIG. 6 is an enlarged view of the seal of the present invention;
reference numbers in the drawings and corresponding part names: 2-lift pump, 3-first two-way electromagnetic valve, 4-filter press, 7-pressure pump, 9-dosing pipe, 10-pressure filtrate return pipe, 11-concentrated water tank, 13-raw water tank, 14-carbon filter vat, 15-sand filter vat, 18-concentrated water return pipe, 19-three-way electromagnetic valve I, 20-silicon carbide ceramic ultrafiltration membrane group, 22-second two-way electromagnetic valve, 24-ultrafiltration tank, 25-three-way electromagnetic valve II, 26-sixth two-way electromagnetic valve, 28-seventh two-way electromagnetic valve, 29-first-stage nanofiltration water tank, 30-three-way electromagnetic valve III, 31-ninth two-way electromagnetic valve, 32-second-stage nanofiltration membrane group, 34-three-way electromagnetic valve IV, 35-twelfth two-way electromagnetic valve, 37-fifteenth two-way electromagnetic valve, 38-three-way electromagnetic valve V, 39-two-stage RO filtering membrane group, 41-thirteenth two-way electromagnetic valve, 42-one-stage RO water tank, 43-sixteenth two-way electromagnetic valve, 44-eighteenth two-way electromagnetic valve, 45-pure water tank, 47-seventeenth two-way electromagnetic valve, 48-two-stage RO membrane filtering pump, 49-two-stage RO backwashing pump, 51-one-stage RO filtering membrane group, 52-fourteenth two-way electromagnetic valve, 53-one-stage RO backwashing pump, 54-one-stage RO membrane filtering pump, 55-two-stage nanofiltration water tank, 56-twelfth one-way electromagnetic valve, 58-eleventh two-way electromagnetic valve, 59-two-stage nanofiltration membrane backwashing pump, 60-two-stage nanofiltration membrane filtering pump, 62-eighth two-way electromagnetic valve, 63-one-stage nanofiltration membrane group, 64-one-stage nanofiltration membrane backwashing pump, 65-a first-stage nanofiltration membrane filter pump, 68-a silicon carbide ceramic membrane backwashing pump, 69-a fifth two-way electromagnetic valve, 70-a fourth two-way electromagnetic valve, 71-an ultrafiltration membrane group filter pump, 72-a rough filtration water tank, 74-a rough filtration pump, 100-a water inlet pipe, 101-a support frame, 102-a cylinder body, 103-a first-stage filter screen, 104-a support edge, 105-a fixing frame, 106-a metal filter screen, 107-high-efficiency filter cotton, 108-a connecting rib water outlet pipe, 109-a hexagonal nut, 110-a water outlet connector, 110 a-a first connecting part, 110 b-a receiving part, 110 c-a second connecting part, 114-a fixing rib, 115-a sealing part, 116-a receiving groove, 117 sealing ribs and 118-reinforcing ribs.
Detailed Description
Embodiments of the present invention are further described with reference to fig. 1 to 6.
Example one
An oilfield reinjection water treatment system comprises a water inlet pipe 100, and is characterized by comprising a raw water tank 13 connected through a pipeline, wherein the water inlet pipe 100 is arranged at the top of the raw water tank 13 and stores sewage flowing from the water inlet pipe 100,
a sand filtering barrel 15, the inlet end of which is connected with the outlet end of the raw water tank 13 through a coarse filtering pump 74, for carbon filtering the water in the raw water tank 13,
a carbon filtering barrel 14, the inlet end of which is connected with the outlet end of the carbon filtering barrel 14, for filtering sand of the water flowing out from the carbon filtering barrel 14,
a coarse filtration water tank 72, the top of which is connected with the sand filtering barrel 15 through a pipeline for temporarily storing the sand-filtered water,
the inlet end of the multi-stage filtering system is connected with the outlet end of the rough filtering water tank 72, and water in the rough filtering water tank 72 is filtered;
the concentrated water tank 11 is arranged on one side of the raw water tank 13, and a pipeline communicated with the concentrated water tank 11 is arranged in the multi-stage filtering system.
The oilfield reinjection water is injected into the raw water tank 13 through the water inlet pipe 100, when the liquid in the raw water tank rises to a certain height, the rough filtration pump 74 is turned on, and enters the rough filtration water tank 72 through the sand filtration barrel 15 (for filtering sediment in raw water) and the carbon filtration barrel 14 (for filtering organic matters in raw water), and when the water in the raw water tank 13 falls to a certain liquid level, the rough filtration pump 74 is turned off.
Further: the multistage filtering system comprises
A concentrated water return pipe 18 for returning the concentrated water filtered by the multi-stage filtering system, one end of which is connected with the concentrated water tank 11,
the silicon carbide ceramic ultrafiltration membrane group 20 is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, the upper end channel of the silicon carbide ceramic ultrafiltration membrane group 20 is provided with a three-way electromagnetic valve I19, the upper side end channel is provided with a second two-way electromagnetic valve 22, the lower end channel is provided with a fourth two-way electromagnetic valve 70, the lower side end channel is provided with a fifth two-way electromagnetic valve 69, the upper end channel and the concentrated water return pipe 18 are communicated by the three-way electromagnetic valve I19, the upper end channel and the outlet end of the coarse filtration water tank 72 are communicated by the lower opening of the three-way electromagnetic valve I19, an ultrafiltration membrane group filter pump 71 is arranged on a pipeline connected with the upper end channel and the concentrated water return pipe 18 by the three-way electromagnetic valve I19, and the lower end channel and the concentrated water return pipe 18 are connected by the fourth two-way electromagnetic valve 70,
the top of the ultrafiltration water tank 24 is connected with the second two-way electromagnetic valve 22 through a pipeline and is used for temporarily storing water filtered by the silicon carbide ceramic ultrafiltration membrane group 20, the bottom of one side of the ultrafiltration water tank 24 is connected with a fifth two-way electromagnetic valve 69 through a pipeline, and a silicon carbide ceramic membrane backwashing pump 68 is arranged between the fifth two-way electromagnetic valve 69 and the ultrafiltration water tank 24;
a first-stage nanofiltration membrane group 63 which is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, wherein the upper side end channel is provided with a three-way electromagnetic valve II 25, the upper end channel is provided with a sixth two-way electromagnetic valve 26, the lower side end channel is provided with a seventh two-way electromagnetic valve 28, the lower end channel is provided with an eighth two-way electromagnetic valve 62, the three-way electromagnetic valve II 25 is opened at the lower part and connected with the upper side end channel and the bottom of the other side of the ultrafiltration water tank 24, a first-stage nanofiltration membrane filter pump 65 is arranged on a pipeline connected with the three-way electromagnetic valve II 25, the upper side end channel is connected with the concentrated water return pipe 18,
the top of the first-stage nanofiltration water tank 29 is connected with the outlet end of the seventh two-way electromagnetic valve 28 of the lower side end channel of the first-stage nanofiltration membrane group 63 through a pipeline, and is used for temporarily storing the concentrated water discharged from the first-stage nanofiltration membrane group 63.
After the liquid level in the rough filtering water tank 72 rises to a certain height, the ultrafiltration membrane group filter pump 71 is started to work, the rough filtering three-way electromagnetic valve I19 is opened downwards to enter the silicon carbide ceramic ultrafiltration membrane group 20, the produced water enters the ultrafiltration water tank 24 through the second two-way electromagnetic valve 22, the concentrated water flows back to the concentrated water tank 11 through the fourth two-way electromagnetic valve 70 and the concentrated water return pipe 18, at the moment, the third two-way electromagnetic valve is closed, and the fifth two-way electromagnetic valve 69 is closed;
when the liquid level of the ultrafiltration water tank 24 is raised to a certain height, the primary nanofiltration membrane filter pump 65 is started to work, the three-way electromagnetic valve II 25 is opened downwards, produced water enters the secondary nanofiltration water tank 55 through the sixth two-way electromagnetic valve 26, concentrated water enters the primary nanofiltration water tank 29 through the seventh two-way electromagnetic valve, at the moment, the three-way electromagnetic valve II 25 is opened downwards, the sixth two-way electromagnetic valve 26 is opened, the seventh two-way electromagnetic valve 28 is opened, and the eighth two-way electromagnetic valve 62 is closed.
Example two
The method is further provided on the basis of the first embodiment: the multistage filtering system comprises
The second-stage nanofiltration membrane group 32 is provided with an upper side end channel, an upper end channel and a lower side end channel, the upper side end channel is provided with a three-way electromagnetic valve III 30, the upper end channel is provided with a ninth two-way electromagnetic valve 31, the lower side end channel is provided with a twelfth electromagnetic valve 56, the lower end channel is provided with an eleventh two-way electromagnetic valve 58, the three-way electromagnetic valve III 30 is opened downwards and connected with the upper side end channel and the outlet end of the first-stage nanofiltration water tank 29, a second-stage nanofiltration membrane filter pump 60 is arranged on a pipeline connected with the upper side end channel and the first-stage nanofiltration water tank 29, the three-way electromagnetic valve III 30 is opened and connected with the upper side end channel and the concentrated water return pipe 18, the twelfth electromagnetic valve 56 on the lower side end channel is connected with the concentrated water return pipe 18 through a pipeline,
the top of the secondary nanofiltration water tank 55 is respectively connected with a ninth two-way electromagnetic valve 31 of a channel at the upper end of the secondary nanofiltration membrane group 32 and a sixth two-way electromagnetic valve 26 of a channel at the upper end of the primary nanofiltration membrane group 63 through pipelines,
one side of the bottom of the second-stage nanofiltration water tank 55 is respectively connected with an eighth two-way electromagnetic valve 62 and an eleventh two-way electromagnetic valve 58 through pipelines, a first-stage nanofiltration membrane backwashing pump 64 is arranged on the pipeline connected with the eighth two-way electromagnetic valve 62, and a second-stage nanofiltration membrane backwashing pump 59 is arranged on the pipeline connected with the eleventh two-way electromagnetic valve 58;
the first-stage RO filtering membrane group 51 is provided with an upper side end channel, a lower side end channel and a lower end channel, the upper side end channel is provided with a three-way electromagnetic valve IV 34, the upper side end channel is provided with a twelfth two-way electromagnetic valve 35, the lower side end channel is provided with a thirteenth two-way electromagnetic valve 41, the lower side end channel is provided with a fourteenth two-way electromagnetic valve 52, the three-way electromagnetic valve IV 34 is opened downwards to connect the upper side end channel with the bottom of the other side of the second-stage nanofiltration water tank 55, a first-stage RO membrane filtering pump 54 is arranged on a pipeline connected with the upper side end channel and the bottom of the second-stage nanofiltration water tank 55, the three-way electromagnetic valve IV 34 is opened upwards to connect the upper side end channel with the concentrated water return pipe 18,
and the top of the primary RO water tank 42 is connected with the thirteenth two-way electromagnetic valve 41 of the lower side end channel of the primary RO filtering membrane group 51 through a pipeline and is used for temporarily storing the concentrated water flowing out of the primary RO filtering membrane group 51.
The invention is further configured to: also comprises
The two-stage RO filter membrane group 39 is provided with an upper side channel, a lower side channel and a lower side channel, a three-way electromagnetic valve V38 is arranged on the upper side channel, a fifteenth two-way electromagnetic valve 37 is arranged on the upper side channel, a sixteenth two-way electromagnetic valve 43 is arranged on the lower side channel, a seventeenth two-way electromagnetic valve 47 is arranged on the lower side channel, a two-stage RO membrane filter pump 48 is arranged on the pipeline which is connected with the lower side channel of the three-way electromagnetic valve V38 and is connected with the bottom of the other side of the upper side channel and the first-stage RO water tank 42 and is used for filtering the concentrated water in the first-stage RO water tank 42, the lower side channel is connected with a concentrated water return pipe 18, the sixteenth two-way electromagnetic valve 43 is connected with the concentrated water return pipe 18 for the lower side end,
and the top of the pure water tank 45 is connected with the fifteenth two-way electromagnetic valve 37 of the upper end channel of the second-level RO filtering membrane group 39 and the twelfth two-way electromagnetic valve 35 of the upper end channel of the first-level RO filtering membrane group 51 through pipelines and is used for storing water filtered by the second-level RO filtering membrane group 39 and the first-level RO filtering membrane group 51, and the bottom of the pure water tank 45 is provided with a sterilizing lamp.
One side of the bottom of one side of the pure water tank 45 is respectively connected with a fourteenth two-way electromagnetic valve 52 and a seventeenth two-way electromagnetic valve 47 through pipelines, a first-stage RO backwashing pump 53 is arranged on the pipeline connected with the fourteenth two-way electromagnetic valve 52, and a second-stage RO backwashing pump 49 is arranged on the pipeline connected with the seventeenth two-way electromagnetic valve 47.
When the liquid level in the first-stage nanofiltration water tank 29 rises to a certain height, the second-stage nanofiltration membrane filter pump 60 is started to work, the three-way electromagnetic valve III 30 is opened downwards, produced water enters the second-stage nanofiltration water tank 55 through the ninth two-way electromagnetic valve 31, concentrated water enters the concentrated water return pipe 18 through the twelfth electromagnetic valve 56 and flows back to the concentrated water tank 11, and when the three-way electromagnetic valve III 30 is opened downwards, the ninth two-way electromagnetic valve 31 is opened, the twelfth electromagnetic valve 56 is opened, and the eleventh two-way electromagnetic valve 58 is closed. The secondary nanofiltration membrane filters water from concentrated water generated by the primary nanofiltration membrane, so that the nanofiltration water yield is improved, the concentration of the nanofiltration concentrated water is improved, and calcium, magnesium, iron and other ions are conveniently separated out in the subsequent flocculation mud pressing procedure;
when the liquid level in the secondary nanofiltration water tank 55 rises to a certain height, the primary RO filter pump is started to work. Filtered water enters the first-stage RO filtering membrane through the lower opening of the three-way electromagnetic valve IV 34, produced water enters the pure water tank 45 through the twelfth two-way electromagnetic valve 35, concentrated water enters the second-stage RO water tank through the thirteenth two-way automatic pressure regulating valve, the twelfth two-way electromagnetic valve 35 is opened, the fourteenth two-way electromagnetic valve 52 is closed and the thirteenth two-way electromagnetic valve 41 is opened when the three-way electromagnetic valve IV 34 is opened;
filtration when the liquid level in the primary RO tank 42 rises to a certain level, the secondary RO filtration pump is turned on. Filtered water enters a second-stage RO filtering membrane group 39 through the lower opening of a three-way electromagnetic valve V38, produced water enters a pure water tank through a fifteenth two-way electromagnetic valve 37, concentrated water flows back to the concentrated water tank 11 through a concentrated water return pipe 18 through a sixteenth two-way electromagnetic valve 43, when the three-way electromagnetic valve V38 is opened, the fifteenth two-way electromagnetic valve 37 is opened, a seventeenth two-way electromagnetic valve 47 is closed, the sixteenth two-way electromagnetic valve 43 is opened, the second-stage RO filtering membrane group 39 filters the concentrated water produced by taking the water from the first-stage RO filtering membrane group 51, the water yield of the RO membrane is improved, the concentration of the RO concentrated water is improved, and the separation of ions such as calcium, magnesium, iron and the like in the subsequent flocculation mud-pressing process is facilitated.
Performing positive washing on the silicon carbide ceramic ultrafiltration membrane or filtering on the rough filtering water tank 72: when the normal filtration of the ceramic ultrafiltration membrane is performed for a set time, the ultrafiltration membrane group filtration pump 71 is opened, the three-way electromagnetic valve I19 is opened, the second two-way electromagnetic valve 22 is closed, the fourth two-way electromagnetic valve 70 is opened and closed, and the fifth two-way electromagnetic valve 69 is opened;
backwashing the silicon carbide ceramic ultrafiltration membrane: when the normal filtration of the ceramic ultrafiltration membrane is performed for a set time, a backwashing pump of the ceramic ultrafiltration membrane group is started, a three-way electromagnetic valve I19 is opened, a second two-way electromagnetic valve 22 is closed, a fourth two-way electromagnetic valve 70 is closed, and a fifth two-way electromagnetic valve 69 is opened;
and (3) washing a primary nanofiltration membrane group 63: when the primary nanofiltration membrane group 63 normally filters and runs for a set time, the primary nanofiltration membrane filter pump 65 is opened, the three-way electromagnetic valve II 25 is opened, the sixth two-way electromagnetic valve 26 is closed, the seventh two-way electromagnetic valve 28 is moved, and the eighth two-way electromagnetic valve 62 is closed, and the full-flow operation is used for performing normal washing on the primary nanofiltration membrane group 63 or filtering on the ultrafiltration water tank 24;
backwashing the primary nanofiltration membrane group 63: when the first-stage nanofiltration membrane group 63 normally filters and runs for a set time, the first-stage nanofiltration membrane backwashing pump 64 is started, the three-way electromagnetic valve II 25 is opened, the sixth two-way electromagnetic valve 26 is closed, the seventh two-way electromagnetic valve 28 is closed, the eighth two-way electromagnetic valve 62 is opened, the nanofiltration membranes are reversely cleaned, and cleaning water flows back to the concentrated water tank 11 through the concentrated water return pipe;
and (3) washing a secondary nanofiltration membrane group 32: when the second-stage nanofiltration membrane group 32 normally filters and runs for a set time, the second-stage nanofiltration membrane filter pump 60 is started, the three-way electromagnetic valve III 30 is opened downwards, the ninth two-way electromagnetic valve 31 is closed, the twelfth automatic valve is opened, the eleventh two-way electromagnetic valve 58 is closed, and the full-flow operation is used for carrying out normal washing on the second-stage nanofiltration membrane group 32 or filtering on the first-stage nanofiltration water tank 29;
backwashing the secondary nanofiltration membrane group 32: when the normal filtration operation of the secondary nanofiltration membrane reaches a set time, the secondary nanofiltration membrane backwashing pump 59 is opened, the three-way electromagnetic valve III 30 is opened, the ninth two-way electromagnetic valve 31 is closed, the twelfth electromagnetic valve 56 is closed, the eleventh two-way electromagnetic valve 58 is opened, the nanofiltration membrane is reversely cleaned, and the cleaning water flows back to the concentrated water tank 11 through the concentrated water return pipe;
forward washing of the primary RO filter membrane group 51: when the normal filtration of the first-stage RO membrane group is carried out for a set time, the first-stage RO membrane filtration pump 54 is opened, the three-way electromagnetic valve IV 34 is opened, the twelfth two-way electromagnetic valve 35 is closed, the 4 thirteenth two-way electromagnetic valve 41 is opened, the fourteenth two-way electromagnetic valve 52 is closed, and the full-flow operation is carried out for the normal washing of the first-stage RO membrane group 51 or the filtration of the second-stage nanofiltration water tank 55;
backwashing of the primary RO filter membrane group 51: when the normal filtration of the first-stage RO membrane is operated for a set time, the first-stage RO backwashing pump is started, the three-way electromagnetic valve IV 34 is opened, the twelfth two-way electromagnetic valve 35 is closed, the thirteenth two-way electromagnetic valve 41 is closed, the fourteenth two-way electromagnetic valve 52 is opened, and the first-stage RO filtration membrane group 51 is reversely cleaned;
second-stage RO filtration membrane group 39 normal wash: when the second-stage RO filtering membrane group 39 normally filters and runs for a set time, the second-stage RO membrane filtering pump 48 is opened, the three-way electromagnetic valve V38 is opened, the fifteenth two-way electromagnetic valve 37 is closed, the sixteenth two-way electromagnetic valve 43 is opened, the seventeenth two-way electromagnetic valve 47 is closed, and the full-flow operation is used for carrying out forward washing on the second-stage RO filtering membrane group 39 or filtering on the first-stage nanofiltration water tank 29;
backwashing of the secondary RO filter membrane group 39: when the second-stage RO filter membrane group 39 normally filters and runs for a set time, the second-stage RO backwashing pump opens the three-way electromagnetic valve V38 to be opened, closes the fifteenth two-way electromagnetic valve 37, closes the sixteenth automatic pressure regulating valve, opens the seventeenth two-way electromagnetic valve 47, and reversely cleans the second-stage RO filter membrane group 39;
the bottom of the sterilization and disinfection pure water tank is provided with a UV sterilization lamp, so that the filtered water is sterilized and disinfected, and the purpose that the reuse water in the oil field is sterile is really achieved.
EXAMPLE III
The method is further set as follows on the basis of the second embodiment: the water inlet pipe 100 is fixedly arranged on one side of the top of the raw water tank 13, a supporting frame 101 with an L-shaped section is arranged at the upper end of the inner wall of the side of the water inlet pipe 100 of the raw water tank 13, and a filter residue barrel is arranged on the supporting frame 101.
By providing the filter residue cartridge, the water entering the raw water tank 13 can be preliminarily filtered.
The invention is further configured to: the filter residue cylinder comprises a rectangular cylinder 102, and a primary filter screen 103 is fixedly arranged at the middle part of the cylinder 102, which is abutted against the supporting frame 101, at the bottom of the cylinder 102.
Through setting up the cartridge filter, the middle part of cartridge filter is provided with one-level filter screen 103 to can filter the water that gets into in raw water tank 13.
Further: a supporting edge 104 is formed in the middle of the cylinder 102, the primary filter screen 103 is fixed on a rectangular fixing frame 105, and the fixing frame 105 is arranged on the supporting edge 104.
The primary filter screen 103 can be conveniently disassembled and cleaned by arranging the fixing frame 105 to be matched with the supporting edge 104.
Further: the bottom of the cylinder 102 is provided with a metal filter screen 106, and the inner side of the metal filter screen 106 is covered with high-efficiency filter cotton 107.
The filtering effect of the filter cartridge can be further ensured by the arrangement of the metal filter screen 106 and the high-efficiency filter cotton 107.
Further: the metal filter screen 106 is distributed in a broken line shape, connecting ribs 108 distributed along the broken line shape are arranged on two sides of the metal filter screen 106, the metal filter screen 106 and the connecting ribs 108 are welded, and the connecting ribs 108 and the inner wall of the filter residue cylinder are fixed in a welding mode.
The arrangement of the metal filter 106 distributed by the zigzag line can ensure the filtering area, thereby ensuring the filtering efficiency.
Example four
The method is further set as follows on the basis of the third embodiment: a water outlet is arranged at the bottom of the other side of the filtering water reservoir, a water discharge joint 110 is fixedly arranged on the water outlet, and an eighteenth two-way electromagnetic valve 44 is arranged at the tail end of the water discharge joint 110; the opposite side of concentrated water tank 11 be provided with the explosive barrel that adds of taking force (forcing) pump 7, force (forcing) pump 7 is connected with the top of concentrated water tank 11 with an explosive tube 9 that adds, and be provided with first two solenoid valve 3 in one side bottom of concentrated water tank 11, two solenoid valve's play end is connected to the end that advances of a pressure filter 4, 4 one sides of pressure filter 4 have the filter-pressing water tank, pressure water tank is last to have pressure filtration liquid back flow 10, the bottom of pressure water filter tank is provided with elevator pump 2, the one end and the elevator pump 2 of pressure filtration liquid back flow 10 are connected, the other end and the raw water tank 13 of pressure filtration liquid back flow 10 are connected.
The processing system also comprises a control cabinet arranged outside, and a control circuit and a controller for controlling the forward washing, the electromagnetic valve and the valve action are arranged in the control cabinet. The automatic control of the filtering device and even the whole processing filtering system can be realized by the processing cabinet, thereby being convenient for operation.
A tubular drain pipe 112 is integrally formed on the drain port, a drain joint 110 is inserted into the drain pipe 112, and a hexagonal nut 109 is threadedly coupled to a portion of the drain joint 110 located inside the drain pipe 112.
The installation of the drain fitting 110 can be facilitated by providing the hexagonal nut 109.
The drain joint 110 comprises a first connecting part 110a, a bearing part 110b and a second connecting part 110c which are sequentially connected, the first connecting part 110a, the bearing part 110b and the second connecting part 110c are gradually decreased, external threads are arranged on the first connecting part 110a and the second connecting part 110c, the eighteenth two-way electromagnetic valve 44 is in threaded connection with the first connecting part 110a, the hexagonal nut 109 is in threaded connection with the second connecting part 110c, the bearing part 110b is in clearance fit with the drain joint 110, a plurality of uniformly distributed fixing ribs 114 are arranged on one side of the bearing part 110b close to the first connecting part 110a, a sealing element 115 is arranged on the bearing part 110b, and a connecting groove matched with the fixing ribs 114 is arranged on the inner side of the sealing element 115.
The sealing performance of the joint connection of the drain joint 110 can be ensured by arranging the sealing member 115; by providing the fixing rib 114 and the coupling groove, the strength of the coupling of the sealing member 115 can be further secured.
A receiving groove 116 which is coaxial with the sealing groove is arranged on the inner side of the sealing element 115, and the receiving groove 116 is arranged; and a plurality of sealing ribs 117 which are uniformly distributed and coaxially arranged are arranged on the outer side of the sealing element 115, and the cross section of each sealing rib 117 is arc-shaped.
The provision of the sealing rib 117 further ensures the mechanical strength of the sealing member 115, and the provision of the receiving groove 116 serves to provide a certain deformation clearance due to pressing when the sealing member 115 is installed.
The sealing element 115 is internally provided with an integrally formed reinforcing rib 118, the section of the reinforcing rib 118 is type, the type opening of the reinforcing rib 118 faces the inner side of the sealing element 115, and the reinforcing rib 118 is made of elastic metal.
The provision of the reinforcing rib 118 ensures the structural strength of the sealing member 115, thereby ensuring the practicability of the sealing member 115.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. The oilfield reinjection water treatment system comprises a water inlet pipe (100) and is characterized by comprising a water inlet pipe and a water outlet pipe which are connected through a pipeline
A raw water tank (13), wherein the inlet pipe (100) is arranged at the top of the raw water tank (13) and stores sewage flowing in from the inlet pipe (100),
a sand filtering barrel (15), the inlet end of which is connected with the outlet end of the raw water tank (13) through a coarse filtering pump (74) and is used for filtering the carbon of the water in the raw water tank (13),
a carbon filter barrel (14), the inlet end of which is connected with the outlet end of the carbon filter barrel (14) and is used for filtering sand of water flowing out of the carbon filter barrel (14),
a coarse filtration water tank (72), the top of which is connected with the sand filtering barrel (15) through a pipeline and used for temporarily storing the sand-filtered water,
the inlet end of the multi-stage filtering system is connected with the outlet end of the rough filtering water tank (72) to filter water in the rough filtering water tank (72);
the concentrated water tank (11) is arranged on one side of the raw water tank, and a pipeline communicated with the concentrated water tank (11) is arranged in the multi-stage filtration system.
2. The oilfield reinjection water treatment system of claim 1, wherein: the multistage filtering system comprises
A concentrated water return pipe (18) for returning the concentrated water filtered by the multi-stage filtering system, one end of the concentrated water return pipe is connected with the concentrated water tank (11),
a silicon carbide ceramic ultrafiltration membrane group (20) which is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, wherein the upper side end channel of the silicon carbide ceramic ultrafiltration membrane group (20) is provided with a three-way electromagnetic valve I (19), the upper side end channel is provided with a second two-way electromagnetic valve (22), the lower side channel is provided with a fourth two-way electromagnetic valve (70), the lower side end channel is provided with a fifth two-way electromagnetic valve (69), the three-way electromagnetic valve I (19) is opened and communicated with the upper end channel and a concentrated water return pipe (18), the three-way electromagnetic valve I (19) is opened and communicated with the upper end channel and the outlet end of a rough filtration water tank (72), and an ultrafiltration membrane group filter pump (71) is arranged on a pipeline connected with the three-way electromagnetic valve I (19), the upper end channel and the concentrated water return pipe (18) are opened and connected with the lower end channel and the concentrated water return pipe (18) through a pipeline,
the top of the ultrafiltration water tank (24) is connected with the second two-way electromagnetic valve (22) through a pipeline and is used for temporarily storing water filtered by the silicon carbide ceramic ultrafiltration membrane group (20), the bottom of one side of the ultrafiltration water tank (24) is connected with a fifth two-way electromagnetic valve (69) through a pipeline, and a silicon carbide ceramic membrane backwashing pump (68) is arranged between the fifth two-way electromagnetic valve (69) and the ultrafiltration water tank (24);
a first-stage nanofiltration membrane group (63) which is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, wherein the upper side end channel is provided with a three-way electromagnetic valve II (25), the upper end channel is provided with a sixth two-way electromagnetic valve (26), the lower side end channel is provided with a seventh two-way electromagnetic valve (28), the lower end channel is provided with an eighth two-way electromagnetic valve (62), the three-way electromagnetic valve II (25) is arranged on the lower part of the upper side end channel and the bottom of the other side of the ultrafiltration water tank (24) and is provided with a first-stage nanofiltration membrane filter pump (65) on a pipeline connected with the upper side end channel and the concentrated water return pipe (18),
and the top of the first-stage nanofiltration water tank (29) is connected with the outlet end of a seventh two-way electromagnetic valve (28) of a lower side end channel of the first-stage nanofiltration membrane group (63) through a pipeline and is used for temporarily storing concentrated water discharged from the first-stage nanofiltration membrane group (63).
3. The oilfield reinjection water treatment system of claim 2, wherein: the multistage filtration system further comprises
A second-stage nanofiltration membrane group (32) which is provided with an upper side end channel, an upper end channel and a lower side end channel hole lower end channel, wherein the upper side end channel is provided with a three-way electromagnetic valve III (30), the upper end channel is provided with a ninth two-way electromagnetic valve (31), the lower side end channel is provided with a twelfth electromagnetic valve (56), the lower end channel is provided with an eleventh two-way electromagnetic valve (58), the three-way electromagnetic valve III (30) is arranged on the lower part of the upper side end channel and the outlet end of the first-stage nanofiltration water tank (29) and is provided with a second-stage nanofiltration membrane filter pump (60) on a pipeline connected with the outlet end of the upper side end channel and the first-stage nanofiltration water tank (29), the three-way electromagnetic valve III (30) is arranged on the upper part of the upper side end channel and is connected with a concentrated water return pipe (18) through a pipeline,
the top of the secondary nanofiltration water tank (55) is respectively connected with a ninth two-way electromagnetic valve (31) of a channel at the upper end of the secondary nanofiltration membrane group (32) and a sixth two-way electromagnetic valve (26) of a channel at the upper end of the primary nanofiltration membrane group (63) through pipelines,
one side of the bottom of the second-stage nanofiltration water tank (55) is respectively connected with an eighth two-way electromagnetic valve (62) and an eleventh two-way electromagnetic valve (58) through pipelines, a first-stage nanofiltration membrane backwashing pump (64) is arranged on the pipeline connected with the eighth two-way electromagnetic valve (62), and a second-stage nanofiltration membrane backwashing pump (59) is arranged on the pipeline connected with the eleventh two-way electromagnetic valve (58);
a first-stage RO filtering membrane group (51) which is provided with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, wherein the upper side end channel is provided with a three-way electromagnetic valve IV (34), the upper end channel is provided with a twelfth two-way electromagnetic valve (35), the lower side end channel is provided with a thirteenth two-way electromagnetic valve (41), the lower end channel is provided with a fourteenth two-way electromagnetic valve (52), the three-way electromagnetic valve IV (34) is arranged on the lower portion of the other side of the upper side end channel and the second-stage nanofiltration water tank (55) in a downward opening manner, a first-stage RO membrane filtering pump (54) is arranged on a pipeline connected with the other side of the upper side end channel and the second-stage nanofiltration water tank (55), the three-stage electromagnetic valve IV (34) is arranged on the upper side of the upper side channel and the concentrated water return pipe (18),
and the top of the primary RO water tank (42) is connected with a thirteenth two-way electromagnetic valve (41) of a lower side end channel of the primary RO filtering membrane group (51) through a pipeline and is used for temporarily storing the concentrated water flowing out of the primary RO filtering membrane group (51).
4. The oilfield reinjection water treatment system of claim 3, wherein: also comprises
A two-stage RO filter membrane group (39) with an upper side end channel, an upper end channel, a lower side end channel and a lower end channel, wherein the upper side end channel is provided with a three-way electromagnetic valve V (38), the upper end channel is provided with a fifteenth two-way electromagnetic valve (37), the lower side end channel is provided with a sixteenth two-way electromagnetic valve (43), the lower end channel is provided with a seventeenth two-way electromagnetic valve (47), the three-way electromagnetic valve V (38) is arranged at the lower part of the upper side end channel and the bottom of the other side of the first-stage RO water tank (42) and is provided with a two-stage RO membrane filter pump (48) on a pipeline connected with the upper side end channel and the bottom of the other side of the first-stage RO water tank (42) for filtering the concentrated water in the first-stage RO water tank (42), the lower side end channel is connected with a concentrated water return pipe (18), and the sixteenth two-way electromagnetic valve (43) is connected with the lower side end for filtering the concentrated water return pipe (18),
a pure water tank (45) the top of which is connected with a fifteenth two-way electromagnetic valve (37) of the upper end channel of the second-level RO filtering membrane group (39) and a twelfth two-way electromagnetic valve (35) of the upper end channel of the first-level RO filtering membrane group (51) through pipelines and is used for storing water filtered by the second-level RO filtering membrane group (39) and the first-level RO filtering membrane group (51),
one side of the bottom of one side of the pure water tank (45) is respectively connected with a fourteenth two-way electromagnetic valve (52) and a seventeenth two-way electromagnetic valve (47) through pipelines, a first-stage RO backwashing pump (53) is arranged on the pipeline connected with the fourteenth two-way electromagnetic valve (52), and a second-stage RO backwashing pump (49) is arranged on the pipeline connected with the seventeenth two-way electromagnetic valve (47).
5. The oilfield reinjection water treatment system of claim 1, wherein: the filter screen is characterized in that the water inlet pipe (100) is fixedly arranged on one side of the top of the raw water tank (13), a supporting frame (101) with an L-shaped section is arranged at the upper end of the inner wall of the side where the water inlet pipe (100) of the raw water tank (13) is located, and a filter residue cylinder is arranged on the supporting frame (101).
6. The oilfield reinjection water treatment system of claim 5, wherein: the filter residue cylinder comprises a rectangular cylinder body (102), and a primary filter screen (103) is fixedly arranged in the middle of the cylinder body (102) which is abutted to the supporting frame (101) at the bottom of the cylinder body (102).
7. The oilfield reinjection water treatment system of claim 6, wherein: the middle part of the cylinder body (102) is provided with a supporting edge (104), the primary filter screen (103) is fixed on a rectangular fixing frame (105), and the fixing frame (105) is arranged on the supporting edge (104).
8. The oilfield reinjection water treatment system of claim 7, wherein: the bottom of the cylinder body (102) is provided with a metal filter screen (106), and the inner side of the metal filter screen (106) is covered with high-efficiency filter cotton (107).
9. The oilfield reinjection water treatment system of claim 8, wherein: metal filters (106) be broken line distribution, and be provided with in the both sides of metal filters (106) along connecting rib (108) that its broken line shape distributes and sets up, metal filters (106) pass through the welding with connecting rib (108), connecting rib (108) pass through welded fastening with the inner wall of filter residue section of thick bamboo.
10. The oilfield reinjection water treatment system of claim 9, wherein: a water outlet is arranged at the bottom of the other side of the filtering reservoir, a water discharge joint is fixedly arranged on the water outlet, and an eighteenth two-way electromagnetic valve (44) is arranged at the tail end of the water discharge joint; the opposite side of dense water tank (11) be provided with add medicine bucket (5) of taking force (forcing) pump (7), force (forcing) pump (7) are connected with the top of dense water tank (11) with a dosing pipe (9), and be provided with first two second solenoid valve (3) in one side bottom of dense water tank (11), the outlet of two solenoid valve is connected to the end that advances of a pressure filter (4), pressure filter (4) pressure filter one side has the filter-pressing water tank, pressure water tank is last to have pressure filtration liquid back flow (10), the bottom of pressure filtration water tank is provided with elevator pump (2), the one end and the elevator pump (2) of pressure filtration liquid back flow (10) are connected, the other end and the raw water tank (13) of pressure filtration liquid back flow (10) are connected.
CN202111039318.7A 2021-09-06 2021-09-06 An oilfield reinjection water treatment system Pending CN113636669A (en)

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