CN109026746B - Medium prestorage process of centrifugal pump - Google Patents
Medium prestorage process of centrifugal pump Download PDFInfo
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- CN109026746B CN109026746B CN201810963387.9A CN201810963387A CN109026746B CN 109026746 B CN109026746 B CN 109026746B CN 201810963387 A CN201810963387 A CN 201810963387A CN 109026746 B CN109026746 B CN 109026746B
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- medium
- centrifugal pump
- pipe
- storage device
- inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
- F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Abstract
The invention discloses a medium pre-storage process of a centrifugal pump, which comprises a motor, a centrifugal pump inlet and outlet branch chain, a first stop valve, a medium pre-storage inlet and outlet branch chain, a second stop valve, a bottom pipe, a filter, a medium pool and a frame, wherein the centrifugal pump inlet and outlet branch chain consists of a centrifugal pump, a centrifugal pump inlet pipe and a centrifugal pump outlet pipe, and the medium pre-storage inlet and outlet branch chain consists of a medium pre-storage device, a medium pre-storage device inlet pipe and a medium pre-storage device outlet pipe. The invention adopts the overground horizontal centrifugal pump and the medium pre-storage device to realize the process function, saves the bottom valve, does not need to be filled with water before starting the pump, avoids the risk caused by excavating and building an underground pump room, has the advantages of simple structure, free starting of the pump, safety, reliability, convenient installation and maintenance, low manufacturing cost, wide application range and the like, and is worthy of popularization.
Description
Technical Field
The invention relates to the field of oil field sewage treatment, in particular to a medium pre-storage process of a centrifugal pump.
Technical Field
The water quality of the produced water of the oil field is characterized in that the mineralization degree is 4-16 × 104mg/l, and free CO in the water2And HCO3High content of CO2The content is generally 100-150 mg/l, HCO3The content is generally 200-600 mg/l; the SRB content is high, generally 104-; high content of high valence metal ions, Ca2+、Mg2+The total amount of Fe is 4000-6000 mg/l2 +The content is 20-30 mg/l, the pH value is low, generally between 5.5-6.5, and the corrosion is strong.
At present, the pump types adopted in the oilfield sewage treatment are complex, and the common pump types comprise an overground horizontal bottom valve centrifugal pump (see figure 1), an underground horizontal centrifugal pump (see figure 2) and a submerged vertical centrifugal pump (see figure 3).
The above-ground horizontal bottom valve centrifugal pump is common in the production of modern enterprises, and has the advantages of simple structure, low cost and the like. The following disadvantages still remain: 1. the pump needs to be filled before starting the pump, and two persons need to operate when starting the pump, so that the labor intensity is increased. 2. The bottom valve is the primary condition for meeting the operation of the centrifugal pump with the horizontal bottom valve on the ground, the normal starting and stopping of the pump are directly influenced by the quality of the bottom valve, in the current sewage treatment process, the bottom valve is frequently damaged due to scaling and corrosion, a crane is required to be matched during maintenance, particularly, when the bottom valve is scaled or is not tightly closed, the pump is frequently started and stopped, even the pump cannot be normally started, the overall performance of production and the pump is seriously influenced, and the labor intensity of operators is increased.
The underground horizontal centrifugal pump omits a bottom valve, can avoid the pump filling operation before starting the pump, eliminates the adverse effect caused by the bottom valve, and saves a large amount of labor force. The following disadvantages still remain: 1. needs to build an underground pump room and has huge investment for anti-seepage treatment. 2. The underground pump house has poor ventilation performance, and brings potential safety hazards for equipment maintenance. 3. The bottom pipe is immersed in sewage for a long time, and is inconvenient to replace after being corroded. 4. The wall body has the risk of water seepage. 5. When the sealing device is used for a long time, the sealing device between the bottom pipe and the wall body is corroded by sewage and is in the risk of water seepage. 6. When heavy rain and waterlogging occur, the rainwater can be poured into the underground pump house, so that great potential safety hazard exists, and the production is seriously influenced.
The submerged vertical centrifugal pump is improved on the basis of an overground horizontal bottom valve centrifugal pump and an underground horizontal centrifugal pump, a bottom valve is omitted, the operation of pump irrigation before starting the pump is avoided, and potential safety hazards caused by water seepage and irrigation of an underground pump room are eliminated. The following disadvantages still remain: 1. the pump support can not be fixed, and the pump body vibrates greatly during operation. 2. The general submerged pump accessories are made of cast iron and have poor performance, and particularly, the accessories such as bearings and the like are easy to damage when being in direct contact with sewage when running under liquid. 3. The water outlet pipe is immersed in the sewage for a long time, and is inconvenient to replace after being corroded. 4. When the sealing device is used for a long time, the sealing device between the sewage outlet pipe and the wall body is corroded by sewage and is in the risk of water seepage. 5. The maintenance and repair need crane cooperation, and labor intensity is big. 6. The purchase and later-stage accessory maintenance costs of self-priming pumps are high.
In the scope of applicant's search, no document has been found that is closely related to the medium prestorage process of the centrifugal pump of the present invention.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to solve the technical problem of providing a medium prestorage process of a centrifugal pump, which is mainly applied to the field of oilfield sewage treatment, adopts an overground horizontal centrifugal pump and a medium prestorage device to realize the process function, omits a bottom valve, does not need to be filled with water before starting the pump, avoids the risk caused by excavating and building an underground pump room, and has the advantages of simple structure, free starting of the pump, safety and reliability, convenience in installation and maintenance, low manufacturing cost, wide application range and the like.
The technical scheme for solving the technical problems is as follows: a centrifugal pump medium prestorage technology is designed, and is characterized in that a device mainly related to the technology comprises a motor, a centrifugal pump inlet and outlet branch chain, a first stop valve, a medium prestorage inlet and outlet branch chain, a second stop valve, a bottom pipe, a filter, a medium pool and a frame, and the overall structural layout of the centrifugal pump medium prestorage technology is as follows: the motor is fixedly connected with the centrifugal pump inlet and outlet branch chain, the centrifugal pump inlet and outlet branch chain is connected with the first stop valve, the first stop valve is connected with the medium pre-storage inlet and outlet branch chain, the medium pre-storage inlet and outlet branch chain is connected with the second stop valve, the second stop valve is connected with the bottom pipe, the motor is connected with the frame, the centrifugal pump inlet and outlet branch chain is connected with the frame, the medium pre-storage inlet and outlet branch chain is connected with the frame, the bottom pipe and the filter are directly communicated with the medium, and the bottom pipe is connected with the filter by a fixing;
the inlet and outlet branch chains of the centrifugal pump consist of a centrifugal pump, a centrifugal pump inlet pipe and a centrifugal pump outlet pipe, the centrifugal pump inlet pipe and the centrifugal pump outlet pipe are connected with the centrifugal pump through flanges, the centrifugal pump inlet pipe is connected with a first stop valve, and the centrifugal pump outlet pipe is connected with external equipment;
the medium pre-storage inlet and outlet branched chain consists of a medium pre-storage device, a medium pre-storage device inlet pipe and a medium pre-storage device outlet pipe, wherein the medium pre-storage device inlet pipe and the medium pre-storage device outlet pipe are connected with the medium pre-storage device through flanges, the medium pre-storage device inlet pipe is connected with a second stop valve, and the medium pre-storage device outlet pipe is connected with a first stop valve.
Compared with the prior art, the medium pre-storage process of the centrifugal pump adopts the medium pre-storage device, can realize that the bottom of the bottom pipe is not required to be provided with a bottom valve, and can normally work without watering the bottom pipe before the centrifugal pump is started. Except the bottom pipe, all equipment is on ground platform, the installation of being convenient for, maintenance, operation, and when the bottom pipe was corroded by sewage, had basically not influenced centrifugal pump medium prestorage technology in addition, when really needing to be changed, only need change the bottom pipe can, need not to change other parts, the bottom pipe is comparatively light, has saved a large amount of labours. Need not to excavate underground pump room in actual production, practiced thrift manufacturing cost, avoided various potential safety hazards that underground pump room brought because of infiltration, watering simultaneously. The process can be easily modified by adding the medium pre-storage device on the basis of the overground horizontal bottom valve centrifugal pump, the underground horizontal centrifugal pump and the submerged vertical centrifugal pump, and has a wide application range.
The medium pre-storage device is required to be filled with the medium in the initial state, the volume of the upper space of the device is equal to the sum of the internal volumes of the inlet pipe and the bottom pipe of the medium pre-storage device, all gas in the inlet pipe and the bottom pipe of the medium pre-storage device is ensured to enter the medium pre-storage device before work, enough medium in the medium pre-storage device is ensured to ensure the normal work of the centrifugal pump, the centrifugal pump is prevented from idling due to lack of the medium, and finally the centrifugal pump is burnt out. The gas in the upper space is brought to the lower space through the water column by utilizing the principle of 'container water injection' and is gradually discharged through the centrifugal pump, and finally the upper space is filled with the medium, and the liquid level of the medium in the lower space is flush with the bottom outlet of the vertical conduit.
Drawings
FIG. 1 is a schematic structural diagram of an above-ground horizontal bottom valve centrifugal pump;
FIG. 2 is a schematic view of an underground horizontal centrifugal pump;
FIG. 3 is a schematic view of a submerged vertical centrifugal pump;
FIG. 4 is a schematic diagram of the medium pre-storage process of the centrifugal pump of the present invention;
FIG. 5 is a schematic diagram of the structure of the inlet and outlet branch chains of the centrifugal pump in the medium pre-storage process of the centrifugal pump of the invention;
FIG. 6 is a schematic diagram of the medium pre-storage inlet and outlet branched chain structure of the centrifugal pump medium pre-storage process of the present invention.
Detailed Description
The invention will be further described with reference to the following examples and the accompanying drawings.
The invention relates to a centrifugal pump medium prestorage process (see figure 4), which is applicable to the field of oilfield sewage treatment and is characterized in that devices mainly related to the process comprise a motor 1, a centrifugal pump inlet and outlet branch chain 2, a first stop valve 3, a medium prestorage inlet and outlet branch chain 4, a second stop valve 5, a bottom pipe 6, a filter 7, a medium pool 8 and a frame 9.
The overall structure layout is as follows: the motor 1 is connected with the centrifugal pump inlet and outlet branch chain 2 through a transmission shaft, the centrifugal pump inlet and outlet branch chain 2 is connected with the first stop valve 3, the first stop valve 3 is connected with the medium pre-storage inlet and outlet branch chain 4, the medium pre-storage inlet and outlet branch chain 4 is connected with the second stop valve 5, the second stop valve 5 is connected with the bottom pipe 6 through flanges, the motor 1 is connected with the frame 9, the centrifugal pump inlet and outlet branch chain 2 is connected with the frame 9, the medium pre-storage inlet and outlet branch chain 4 is connected with the frame 9 through bolts, the bottom pipe 6 and the filter 7 are directly communicated with the medium pool 7, and the bottom pipe 6 is connected with the filter 7 through a;
the centrifugal pump inlet and outlet branch chain 2 consists of a centrifugal pump 21, a centrifugal pump inlet pipe 23 and a centrifugal pump outlet pipe 22, the centrifugal pump inlet pipe 23 and the centrifugal pump outlet pipe 22 are connected with the centrifugal pump 21 through flanges, the centrifugal pump inlet pipe 23 is connected with the first stop valve 3, and the centrifugal pump outlet pipe 22 is connected with external equipment;
the medium pre-storage inlet and outlet branched chain 4 consists of a medium pre-storage box body 41, an upper space 42, a lower space 43, a partition plate 44, a vertical guide pipe 45, a medium pre-storage device inlet pipe 4/6 and a medium pre-storage device outlet pipe 47, wherein the medium pre-storage device inlet pipe 46 and the medium pre-storage device outlet 47 are connected with the medium pre-storage device 41 through flanges, the medium pre-storage device inlet pipe 47 is connected with the second stop valve 5, and the medium pre-storage device outlet pipe 47 is connected with the first stop valve 3.
The upper space 42 and the lower space 43 are filled with media in the initial state, the volume of the upper space 42 of the device is equal to the sum of the internal volumes of the inlet pipe 46 and the bottom pipe 6 of the medium pre-storage device, the gas in the inlet pipe 46 and the bottom pipe 7 of the medium pre-storage device is ensured to completely enter the upper space 42 before the operation, enough media in the medium pre-storage device 41 are ensured to ensure the normal operation of the centrifugal pump, the centrifugal pump is prevented from idling due to lack of media, and finally the centrifugal pump is burnt out. The gas in the upper space 42 is brought to the lower space 45 through the water column of the vertical conduit 45 by utilizing the principle of 'container water injection', and is gradually discharged through a centrifugal pump, and finally the upper space 42 is filled with the medium, and the liquid level of the medium in the lower space 43 is flush with the outlet at the bottom of the vertical conduit 45.
The medium pre-storage device 41 is made of titanium alloy steel.
The working principle and the operation process of the medium prestorage process of the centrifugal pump are as follows: opening the first stop valve 3 and the second stop valve 5, starting the motor 1, driving the centrifugal pump 2 to rotate by the motor 1, pumping the medium to the centrifugal pump outlet pipe 22 from the centrifugal pump inlet pipe 23 by the centrifugal pump working, connecting the centrifugal pump inlet pipe 23 with the medium pre-storage device outlet pipe 47 through the first stop valve 3, continuously reducing the medium in the lower space 43 to form negative pressure along with the continuous cutting off of the medium from the medium pre-storage device outlet pipe 47, connecting the upper space 42 with the lower space 43 through the vertical conduit 45, so that the upper space 42 also forms negative pressure, thereby leading the medium in the medium pool 8 to the upper space 42 of the medium pre-storage device through the bottom pipe 7, the stop valve 5 and the medium pre-storage device inlet pipe 46, and simultaneously leading the medium in the upper space 42 to the lower space 43 gradually, when the bottom pipe 6 and the medium pre-storage device inlet pipe 46 are filled with the medium and flow to the, the medium first flows through the vertical conduit 45 to the lower space 43 and the reforming process completes the pumping of the medium by the centrifugal pump 21 to the external equipment.
The purpose of the present invention is to keep the gas in the upper space 42 still in the upper space, ensure that there is no gas in the outlet pipe 47 of the medium pre-storage device, and prevent the centrifugal pump 21 from idling due to the whole sucked air and finally burning out.
If the motor 1 is switched off, the lower space 42 still retains the medium when the centrifugal pump 21 is stopped. When started again, the above process will be repeated.
Nothing in this specification is said to apply to the prior art.
Claims (3)
1. A kind of centrifugal pump medium prestorage craft, characterized by that the device that this craft mainly involves includes the electric motor, centrifugal pump business turn over branched chain, first stop valve, medium prestorage business turn over branched chain, second stop valve, bottom pipe, filter, medium pool and framework, its overall structure overall arrangement is: the motor is connected with the centrifugal pump inlet and outlet branch chain through a transmission shaft, the centrifugal pump inlet and outlet branch chain is connected with the first stop valve, the first stop valve is connected with the medium prestorage inlet and outlet branch chain, the medium prestorage inlet and outlet branch chain is connected with the second stop valve, the second stop valve is connected with the bottom pipe through flanges, the motor is connected with the frame, the centrifugal pump inlet and outlet branch chain is connected with the frame, the medium prestorage inlet and outlet branch chain is connected with the frame through bolts, the bottom pipe and the filter are directly communicated with the medium, and the bottom pipe is connected with the filter through a;
the inlet and outlet branch chains of the centrifugal pump consist of a centrifugal pump, a centrifugal pump inlet pipe and a centrifugal pump outlet pipe, the centrifugal pump inlet pipe and the centrifugal pump outlet pipe are connected with the centrifugal pump through flanges, the centrifugal pump inlet pipe is connected with a first stop valve, and the centrifugal pump outlet pipe is connected with external equipment;
the medium pre-storage inlet and outlet branched chain consists of a medium pre-storage device, a medium pre-storage device inlet pipe and a medium pre-storage device outlet pipe, wherein the medium pre-storage device inlet pipe and the medium pre-storage device outlet pipe are connected with the medium pre-storage device through flanges, the medium pre-storage device inlet pipe is connected with a second stop valve, the medium pre-storage device outlet pipe is connected with a first stop valve, a partition plate is arranged at the upper part of the medium pre-storage device and divides the internal space of the medium pre-storage device into an upper space and a lower space, the upper space is connected with the medium pre-storage device inlet pipe, the lower space is connected with the medium pre-storage device outlet pipe, the upper space and the lower space are connected through a vertical guide pipe, the volume of the upper space of the medium pre-storage device is equal to the sum of the internal volumes of the medium.
2. A centrifugal pump medium prestorage process according to claim 1, characterized in that a medium prestorage device is provided in the process, the medium prestorage device is directly connected with the bottom pipe through a second stop valve, and the bottom pipe does not need to be provided with a bottom valve.
3. A centrifugal pump media prestorage process according to claim 1, characterized in that the media prestorage means is already charged with media in an initial state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963387.9A CN109026746B (en) | 2018-08-22 | 2018-08-22 | Medium prestorage process of centrifugal pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810963387.9A CN109026746B (en) | 2018-08-22 | 2018-08-22 | Medium prestorage process of centrifugal pump |
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| Publication Number | Publication Date |
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| CN109026746A CN109026746A (en) | 2018-12-18 |
| CN109026746B true CN109026746B (en) | 2020-07-28 |
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| CN201810963387.9A Active CN109026746B (en) | 2018-08-22 | 2018-08-22 | Medium prestorage process of centrifugal pump |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895885A (en) * | 1972-01-12 | 1975-07-22 | Joenkoepings Mek Werkstads | Emptying system for fluid tanks |
| CN204476775U (en) * | 2015-02-10 | 2015-07-15 | 青岛运兴机械有限公司 | A kind of self prime pump |
| CN204851661U (en) * | 2015-07-10 | 2015-12-09 | 湖北福尔嘉医药化工有限公司 | Skeleton symbol negative pressure is from cucurbitula device |
| CN206943018U (en) * | 2017-07-14 | 2018-01-30 | 辽宁格瑞特泵业有限公司 | A kind of Molten sulphur pot type self-priming apparatus |
-
2018
- 2018-08-22 CN CN201810963387.9A patent/CN109026746B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895885A (en) * | 1972-01-12 | 1975-07-22 | Joenkoepings Mek Werkstads | Emptying system for fluid tanks |
| CN204476775U (en) * | 2015-02-10 | 2015-07-15 | 青岛运兴机械有限公司 | A kind of self prime pump |
| CN204851661U (en) * | 2015-07-10 | 2015-12-09 | 湖北福尔嘉医药化工有限公司 | Skeleton symbol negative pressure is from cucurbitula device |
| CN206943018U (en) * | 2017-07-14 | 2018-01-30 | 辽宁格瑞特泵业有限公司 | A kind of Molten sulphur pot type self-priming apparatus |
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| Publication number | Publication date |
|---|---|
| CN109026746A (en) | 2018-12-18 |
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