CN117295896A - Gas seal column pump for high temperature applications - Google Patents
Gas seal column pump for high temperature applications Download PDFInfo
- Publication number
- CN117295896A CN117295896A CN202180098165.5A CN202180098165A CN117295896A CN 117295896 A CN117295896 A CN 117295896A CN 202180098165 A CN202180098165 A CN 202180098165A CN 117295896 A CN117295896 A CN 117295896A
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- China
- Prior art keywords
- gas
- pump
- column
- gas seal
- seal column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007789 gas Substances 0.000 claims abstract description 233
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 238000005260 corrosion Methods 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 239000003517 fume Substances 0.000 claims abstract description 5
- 230000004044 response Effects 0.000 claims abstract description 5
- 230000008878 coupling Effects 0.000 claims abstract 3
- 238000010168 coupling process Methods 0.000 claims abstract 3
- 238000005859 coupling reaction Methods 0.000 claims abstract 3
- 238000010926 purge Methods 0.000 claims description 24
- 238000012856 packing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/083—Units comprising pumps and their driving means the pump being electrically driven for submerged use and protected by a gas-bell
-
- 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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
- F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated
Abstract
The gas seal column pump may include a pump driver, a gas seal column with a corrosion resistant telescoping liner, a seal gas control box, and a pump. The drive motor of the pump drive, the gas seal column, and the pump may comprise a hermetically sealed vertically oriented pumping system, wherein the gas seal column is operable to replace a mechanical seal around a drive shaft coupling the drive motor to the pump. Pressurized sealing gas pumped into the drive motor and gas seal column can displace corrosive fumes and the product being pumped. The vertical length of the telescoping liner can be controlled to mitigate interference with pump operation. In response to input from the level sensor, the seal gas control box may use a plurality of valves to regulate the pressure of the seal gas.
Description
Copyright statement
A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the patent and trademark office patent file or records, but otherwise reserves all copyright rights whatsoever.
Background
In the pumping world, which is dominated by various types of horizontal pumps, mechanical seals or shaft packing glands are the most cumbersome and costly to maintain items on all other pump components.
Vertical pumps with high temperature applications are known. However, such pumps typically employ standard pump components that do not allow for extension or shortening by telescoping features.
Disclosure of Invention
One way to eliminate these problems and their associated costs is to remove both components and vertically reposition the pump components by a gas seal column surrounding the drive shaft between the drive motor and the pump. The drive motor, gas seal column and pump may form a gas tight seal unit that pressurizes the product containing portion. However, high temperature applications may require a corrosion resistant liner metal outer column or, for certain applications, a metal outer column that supports the telescoping high temperature corrosion resistant liner described herein.
These numerous benefits, as well as the other numerous benefits listed herein, may be realized by utilizing the present invention:
by means of a gas-tight column, there is no contact between the rotating and stationary parts of the pump, allowing a continuous dry running capability. Dry running capability can result in elimination of friction, heat, mechanical wear, power loss, high initial costs, installation costs, replacement costs, and attendant damage costs in the event of unavoidable failure of mechanical seals and packing, and significantly reduces the likelihood of product leakage that requires cleaning and reporting to supervision or authorities.
Gas seal column, through the use of product monitoring sensors, also allows for continuous and timely product control, reporting, operator alerting, and controlled automatic shut down of pumping operations if needed, to prevent equipment and incidental damage. Conversely, seal and packing failures may manifest themselves in large puddles on the floor.
Combining the gas seal column with all the components of the hermetically sealed pumping system allows:
improved internal atmosphere control to prevent corrosion of internal components, especially motor bearings.
Improved product control, substantially without the possibility of product escaping from the containment enclosure, possibly resulting in personnel injury or nearby equipment damage.
In many cases, the cost of the bearing housing is eliminated by protecting the extended motor shaft using an extended shaft motor with a gas tight seal of corrosion resistant sleeve.
Operation at higher temperatures may be achieved by using corrosion resistant bushings inside metal support columns similar to lined pipes and pumps currently on the market, and for specific applications by utilizing structural metal columns with telescoping corrosion resistant bushings as described herein.
In the case where an integral corrosion resistant pump post cannot be used, a bushing or telescoping bushing may be used.
With all of the above in mind, it is readily contemplated that the overall life cycle cost of a gas seal column pump (especially a structural metal column with telescoping corrosion resistant bushings optimized for high temperature conditions) will be significantly lower than that of a similarly implemented mechanical seal or filler pump.
Drawings
Certain illustrative embodiments showing the organization and method of operation, together with objects and advantages, may be best understood by reference to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a cross-sectional view of a hermetically sealed gas seal column pump consistent with certain embodiments of the present invention and illustrates a pump driver, a gas seal column, a seal gas control box, and a pump.
FIG. 2 is a cross-sectional view of a hermetically sealed gas seal column pump consistent with certain embodiments of the present invention and illustrates a bearing shaft adapter for use with a pump driver, a gas seal column, and a pump.
FIG. 3 is a cross-sectional view of a hermetically sealed column pump with a telescoping liner consistent with certain embodiments of the present invention, and illustrates a pump driver, a gas seal column with a telescoping liner, and a pump.
Detailed Description
While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will herein be described in detail specific embodiments, with the understanding that the present disclosure of such embodiments is to be considered as an exemplification of the principles and is not intended to limit the invention to the specific embodiments illustrated and described. In the description that follows, like reference numerals are used to describe the same, similar or corresponding parts in the several views of the drawings.
The terms "a" or "an", as used herein, are defined as one or more than one. The term "plurality", as used herein, is defined as two or more than two. The term another, as used herein, is defined as at least a second or more. The terms including and/or having, as used herein, are defined as comprising (i.e., open language). The term coupled, as used herein, is defined as connected, although not necessarily directly, and not necessarily mechanically.
Reference throughout this specification to "one embodiment," "certain embodiments," "an embodiment," or similar terms means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of such phrases or in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments without limitation.
The gas seal column pump (hereinafter referred to as "invention") may include a pump driver, a gas seal column, a seal gas control box, and a pump. The pump driver may include a driving motor and a cooling fan. The drive motor may include a drive shaft that extends through the gas seal column to the pump. The drive motor may further comprise a pressurized housing. The cooling fan may be externally mounted to the drive motor to cool the drive motor rather than driving the fan from an extension of the drive shaft of the drive motor through the top of the drive motor. Alternatively, conduit cooling from a remote source may be used to cool the drive motor.
The drive motor may include an air inlet duct for introducing sealing air into the drive motor adjacent the upper motor bearing. The drive motor may further include a plurality of exhaust ports positioned adjacent the lower motor bearing for exhausting sealing gas from the drive motor while protecting the lower motor bearing.
The sealing gas may be clean and pressurized and may be provided locally or remotely. A first option for the sealing gas would be clean air free of corrosive fumes. Alternatively, if air is not compatible with the product being pumped, a special gas may be used. If the selected seal gas cannot be released to the environment after use due to cost, toxicity, contamination, or other reasons, the seal gas may be directed to a local gas treatment system or collected in a tank for subsequent processing. After processing, the sealing gas may be reused or discarded.
When pumped or standby, the gas seal column may be operable to enclose the drive shaft components of the pumping system when the gas seal column controller is activated, and may be used as a substitute for mechanical seals and packing by controlling the product level within the gas seal column using the pressure of the seal gas.
The gas seal column may include a mounting panel at a top end of the gas seal column. A circular groove in the mounting panel may capture a first O-ring operable to pressure seal an interface between the drive motor and the gas seal post.
The inlet and outlet pipe connections in the upper part of one quarter of the gas seal column may allow the seal gas to flow into and out of the gas seal column. The purge gas valve and the purge gas discharge valve may control the flow of the sealing gas. Sealing gas may be continually flowed through the drive motor to prevent corrosive fumes from the product.
The gas seal column may include a plurality of splash muffler disks. In a preferred embodiment, there may be four splash muffler disks. The gas seal column may further comprise a plurality of anti-rotation panels. In a preferred embodiment, there may be two sets of anti-rotation panels. The decision to use multiple splash-damping discs and/or multiple anti-rotation panels may be application dependent.
The gas seal column may include a plurality of level sensors. A plurality of level sensors may detect the product level within the gas seal column and may report the product level to a seal gas control box. Based on inputs from a plurality of level sensors, the seal gas control box may be adapted to monitor product levels, may report product levels, may alert an operator, and may control product levels of products that may enter the gas seal column during operating or non-operating conditions when the seal gas control box is energized by the purge gas control switch. As a non-limiting example, if the product level exceeds a predetermined alarm threshold, the seal gas control box may be adapted to alarm the operator by activating a flashing indicator, sending a text message, a page or email, sounding a sound transducer, or a combination thereof. As another non-limiting example, the seal gas control box may shut down the pump and other possible components if the product level exceeds a predetermined shut-down threshold.
In a preferred embodiment, there may be four level sensors. In some embodiments, four level sensors may be equally spaced along the gas seal column. The first level sensor may be located at the lowest level of the gas seal column. The second level sensor, the third level sensor, and the fourth level sensor may be positioned in sequence above the first level sensor, with the fourth level sensor at a highest level within the gas seal column.
The purge gas control switch may be activated manually or automatically upon pump start-up. In response to activation of the purge gas control switch, the seal gas control box may initiate a low volume purge gas flow throughout the system by opening the purge gas valve and maintaining the first and second gas valves closed. In some embodiments, the opening and closing of the purge gas valve, the first gas valve, the second gas valve, and the gas vent valve may be controlled by a relay or other controller located within the sealed gas control box.
In some embodiments, the purge gas valve, the first gas valve, and the second gas valve may provide different flow rates of the sealing gas when in the open state. Different flow rates may result in different pressures being applied to the product within the gas-tight column. The minimum flow rate and thus the lowest pressure on the product within the gas-tight column may be due to the purge valve being opened only. The highest flow rate and thus the highest pressure on the product within the gas seal column may be due to the purge valve, the first gas valve and the second gas valve being all open. Because the sealing gas may be directed into the top of the gas seal column, the pressure applied by the sealing gas to the product may act to force the product level down.
When the first level sensor detects the product and opens the purge gas valve, the seal gas control box can know that the product has entered the gas seal column. If the product is detected by the second level sensor, the seal gas control box may attempt to prevent further product rise in the gas seal column by increasing the pressure of the seal gas within the gas seal column. The seal gas control box may open the first gas valve to release a higher flow of seal gas into the drive motor and the gas seal column. If this is active and the product level drops, the second level sensor may reflect that the product is no longer in contact with the second level sensor. However, the sealing gas control box may hold the first gas valve in an open state. The seal gas control box may close the first gas valve, the purge gas valve, and the gas discharge valve when the first level sensor indicates that the product level has fallen below the first level sensor.
Alternatively, if the product level continues to rise above the second level sensor and is detected by the third level sensor, the sealing gas control box may activate and lock the relay opening the second gas valve, releasing even higher flow of gas into the drive motor and gas seal column to further increase the gas pressure in order to push the product down into the gas seal column. The seal gas control box may additionally be adapted to send an alarm to an operator reporting the presence of a product at a higher level in the gas seal column than would normally be expected. The higher level flow of gas will continue until the product is driven down to the first level sensor, which will open and deactivate the two locked relays, and then will close the first gas valve, the second gas valve, the purge gas valve, and the gas discharge valve.
Alternatively, if the product level continues to rise and is detected by the fourth level sensor, the seal gas control box may be adapted to initiate a controlled, fully closed of the system and close all valves to maintain the hermetic seal integrity of the total pump housing and prevent equipment damage or other collateral damage from occurring. This closing sequence allows the operator to investigate what caused the condition and correct the problem.
The first level sensor may be located slightly above the minimum priming level of the pump. When the pump is stopped, the inlet or outlet conditions may cause the product to rise or fall in the gas-tight column. As previously described, the rise in product levels can be controlled. In response to the product level falling below the first level sensor, the seal gas control box may deactivate a relay that keeps the purge valve open. Closing the purge valve may stop the flow of purge gas until the product rises to reach the first level sensor. The seal gas control box may function in this manner whenever activated, whether the pump is operating or in a standby mode.
The description of sensing and control presented herein is by way of illustration only. There are many other sensing and control techniques that may be applied and those of ordinary skill in the art will recognize that such techniques fall within the spirit and scope of the present invention.
The pump shown is a centrifugal pump comprising a pump housing having an inlet and an outlet, and a second O-ring for sealing the cover plate to the pump housing. The pump housing may be hermetically sealed to the gas seal column with a third O-ring, thereby completing the hermetic seal of the entire assembly. The drive motor, gas seal column, and pump may comprise a single, hermetically sealed unit.
The pump may include double impellers to move the product. The secondary impeller may be mounted on the back of the primary impeller. The secondary impeller may be larger in diameter than the primary impeller. The secondary impeller may form a hydrodynamic shaft seal and may prevent product flow into the gas seal column during pumping operations. The secondary impeller may not be required for all applications and may therefore be optional.
The drive shaft may be a sleeved shaft that protects the drive shaft from corrosion.
In some applications, the pump may need to operate at high temperatures. In those cases where an increase in the length of the integrated corrosion resistant column may interfere with pump operation, a gas seal column in the form of a bushing may be used. In fig. 3, the outer column maintains the structural integrity required for reliable pump operation, and the two-part telescoping liner maintains the hermetic seal and corrosion resistance requirements of the application.
Alternatively, bellows bushings may be used instead of telescoping bushings if available and suitable for the application.
The pumping system shown in fig. 1 using a drive motor including an extension shaft is for illustration only. Those of ordinary skill in the art will recognize that different arrangements of drive shafts may fall within the spirit and scope of the present invention as long as the drive motor is coupled to the pump via a gas seal column.
Referring to fig. 2, some applications may require a specific shaft of length, diameter, or construction material that is not available in an extension shaft drive motor. Applications requiring a longer drive shaft and gas seal column may be achieved by using a bearing shaft adapter between the drive motor and the gas seal column. The bearing shaft adapter may be coupled and sealed to the drive motor and the gas seal post such that the assembly of the drive motor, the bearing shaft adapter, the gas seal post, and the pump is hermetically sealed. The gas seal column may be of any practical length and is designed with multiple bearing supports and level sensors along the length of the gas seal column to meet the requirements of the application.
These bearing shaft adapter interfaces may be sealed with additional O-rings to maintain the hermetic seal integrity of the pump enclosure.
Since the gas-tight sealing unit encloses a fixed volume of void, the gas-tight sealing unit passively assists in controlling the level of product that attempts to rise in the gas-tight column. Passive assist may be caused by Boyles Law which states that "at constant temperature, the pressure of an ideal gas is inversely proportional to the volume of the ideal gas".
P1×V1＝P2×V2
Wherein P1 is the first pressure at which,
v1 is the first volume of the liquid,
p2 is the second pressure
V2 is the second volume.
Briefly-if you halve the available volume of a fixed amount of gas, the pressure will double. As a non-limiting example, as the product rises within the gas seal column, the volume available for the seal gas decreases. The calculation may be performed within certain limits based on the length of the telescoping liner to create a performance scale for the pump based on the length of the telescoping liner that allows for thermal expansion and thermal contraction during temperature changes. According to boyle's law, as the volume of the sealing gas decreases, the pressure of the sealing gas increases and the sealing gas may become more effective against the rise of the product.
When experience is gained with the introduction and application of the present invention, operational benefits should be considered that can be optimized by reducing empty space in the motor housing and the internal shape and size of the gas seal column around the drive shaft, all of which can affect the system response time.
Turning now to fig. 1, a cross-sectional view of the present invention 100 through a pump driver 200, a gas seal column 220, and a pump 270 is shown. The pump driver 200, the gas seal column 220, and the pump 270 may be hermetically sealed from each other. By way of non-limiting example, the circular groove 224, the first O-ring 226, the second O-ring 278, the cover plate 280, the pump housing 272, and the third O-ring 282 on the mounting panel 222 may prevent air, seal gas 208, and products from leaking in and out. The pump driver 200 may include a drive motor 202 and a cooling fan 204.
A gas seal column controller 310 including a seal gas control box 250, a purge valve 254, a first gas valve 256, and a second gas valve 258 may control the flow of seal gas 208 into the present invention 100 when activated by a purge gas control switch 252. Sealing gas 208 may be directed into the drive motor 202 via the inlet pipe 206 such that the sealing gas 208 may protect motor bearings. As a non-limiting example, the sealing gas 208 may protect the upper motor bearing 210 and the lower motor bearing 212. The seal gas 208 may exit the drive motor 202 via a plurality of exhaust ports 216.
The sealing gas 208 may also flow into the gas seal column 220 via an inlet pipe connection 230 and may exit the gas seal column 220 via an outlet pipe connection 232. The seal gas 208 may pressurize the gas seal column 220 to force the product downward. The pressure may be regulated by the seal gas control box 250 by opening and closing the purge valve 254, the first gas valve 256, and the second gas valve 258. The gas vent valve 234 may prevent or allow the seal gas 208 to exit the gas seal column 220 and may also be controlled by a seal gas control box 250. The seal gas control box 250 may also control the power of the drive motor 202 so that the seal gas control box 250 may shut down the system as needed.
The first level sensor 240, the second level sensor 242, the third level sensor 244, and the fourth level sensor 246 may detect the product level within the gas seal column 220 and may report the product level to the seal gas control box 250.
The drive shaft 214 may rotate a main impeller 290 in the pump 270 to move product from the inlet 274 to the outlet 276. The secondary impeller 292 may be coupled to the primary impeller 290 and may form a hydrodynamic seal to block the flow of product into the gas seal column 220. The gas seal column 220 may include a plurality of anti-rotation panels 238 and a plurality of splash-attenuation discs 236.
Turning now to fig. 2, a cross-sectional view of the present invention 100 is shown through a pump driver 200, a gas seal post 220, a bearing shaft adapter 300, and a pump 270. The bearing shaft adapter 300 may allow for the introduction of a particular shaft 312 as necessary. As a non-limiting example, an additional O-ring 306 may hermetically seal the bearing shaft adapter 300 to the drive motor 202 and the gas seal post 220. The plurality of level sensors 304 may detect the product level within the gas seal column 220 and may report the product level to a seal gas control box 250 as in fig. 1. Sealing gas 208 may flow through the invention 100 as described in fig. 1. As a non-limiting example, the sealing gas 208 may enter the gas seal column 220 via an inlet pipe connection 230 and exit when an outlet pipe connection 232 is permitted at a gas vent valve 234. The seal gas 208 may flow through the plurality of bearing supports 302 to push the product level down to any product level required for the gas seal column 220.
Turning now to fig. 3, a cross-sectional view of a gas seal column with a telescoping liner shows a drive motor 400 hermetically sealed to a top section 402 of the telescoping liner and a lower section 404 of the telescoping liner hermetically sealed to a pump housing 408. The two bushings are hermetically sealed by an "O" ring 406 contained in a groove in the top section 402 of the bushing and allow for a vertically oriented linear expansion and contraction between the two bushings to allow for thermal expansion and contraction during temperature changes. The two-part telescoping bushing is vertically adjusted by a vertical sliding connection between the top section 402 of the telescoping bushing and the lower section 404 of the telescoping bushing while maintaining integrity to prevent leakage of gas, fluid, or any other material contained within the telescoping bushing. All telescoping components are housed within structural column 410.
While certain illustrative embodiments have been described, it is evident that many alternatives, modifications, permutations and variations will become apparent to those of ordinary skill in the art in light of the foregoing description.
Claims (12)
1. A gas seal column pump comprising a pump driver, a gas seal column with a telescoping liner, and a pump;
wherein the drive motor of the pump drive, the gas seal column and the pump comprise a hermetically sealed vertically oriented pumping system;
wherein the gas seal column bushing is vertically adjusted;
wherein the gas seal column is operable to replace mechanical seals and packing seals around a drive shaft coupling the drive motor to the pump.
2. The gas-sealed column pump according to claim 1,
wherein the drive motor includes an air intake pipe through which sealing gas is introduced into the drive motor;
wherein the sealing gas is pressurized;
wherein the sealing gas protects the motor bearings and the interior of the drive motor by displacing corrosive fumes emitted by the product being pumped;
wherein the sealing gas exits from the drive motor via a plurality of exhaust ports.
3. The gas-tight column pump according to claim 2,
wherein the gas seal column comprises an inlet pipe connection through which the seal gas enters the gas seal column;
wherein the sealing gas comprises an outlet pipe connection through which the sealing gas exits the gas seal column via a purge gas discharge valve;
wherein the sealing gas within the gas seal column displaces the corrosive fumes and the products;
wherein the pressure of the sealing gas is increased and decreased to control the product level within the gas seal column.
4. The gas-sealed column pump according to claim 3,
wherein the gas seal column comprises a plurality of level sensors that detect the product level within the gas seal column;
wherein the plurality of level sensors are positioned at different heights within the gas seal column.
5. The gas-tight column pump of claim 4,
wherein the plurality of level sensors includes a first level sensor, a second level sensor, a third level sensor, and a fourth level sensor;
wherein the first level sensor is located at the lowest level of the gas seal column and above the lowest level of the product required for the pump to start and when activated indicates that the product has entered the gas seal column and the pump is started for operation;
wherein the second level sensor is located above the first level sensor and when activated indicates that the pressure of the sealing gas needs to be increased;
wherein the third level sensor is located above the second level sensor and when activated indicates that further increases in pressure of the sealing gas are required and closes the purge gas exhaust valve to further assist in increasing sealing gas pressure;
wherein the fourth level sensor is located above the third level sensor and when the fourth level sensor is activated, a controlled shut down of the pump or the whole system is initiated.
6. The gas-sealed column pump according to claim 3,
wherein the gas seal column comprises a plurality of splash-damping disks, a plurality of anti-rotation panels, a plurality of bearing supports, or a combination thereof, to control movement of the product within the gas seal column when control movement of the product is desired.
7. The gas seal column pump of claim 3, further comprising:
a seal gas control box for monitoring the product level, reporting the product level, and for controlling the product level and continued operation of the pump;
wherein the seal gas control box monitors the product level via input from the plurality of level sensors.
8. The gas-tight column pump of claim 7,
wherein the seal gas control box controls the product level by opening and closing a purge gas valve, a first gas valve, a second gas valve, the purge gas vent valve, or a combination thereof.
9. The gas-sealed column pump according to claim 3,
wherein the pump comprises an auxiliary impeller coupled to a main impeller;
wherein the secondary impeller is larger in diameter than the primary impeller;
wherein the secondary impeller is positioned closer to the gas seal column than the primary impeller;
wherein the secondary impeller is operable as a hydrodynamic shaft seal to prevent flow of the product into the gas seal column during pumping operations.
10. The gas seal column pump of claim 1, further comprising:
a hermetically sealed pressurized bearing shaft adapter;
wherein the bearing shaft adapter is operable to extend and/or replace the drive shaft;
wherein the bearing shaft adapter comprises a particular shaft comprising a pre-configured length, material, composition, or combination thereof.
11. The gas seal column pump of claim 1, further comprising a gas seal column of a hermetically sealed telescoping liner for high temperature conditions.
12. A gas seal column pump comprising a pump driver, a gas seal column with a telescoping liner, and a pump;
wherein the drive motor of the pump drive, the gas seal column and the pump comprise a hermetically sealed vertically oriented pumping system;
wherein the gas seal column bushing is a gas seal column of a hermetically sealed telescopic bushing for high temperature conditions, the gas seal column bushing being vertically adjusted in response to high temperature operation;
wherein the gas seal cartridge is corrosion resistant;
wherein the gas seal column is operable to replace mechanical seals and packing seals around a drive shaft coupling the drive motor to the pump.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17/205,124 US20220299033A1 (en) | 2021-03-18 | 2021-03-18 | Gas Seal Column Pump for Elevated Temperature Applications |
| US17/205,124 | 2021-03-18 | ||
| PCT/US2021/023072 WO2022197302A1 (en) | 2021-03-18 | 2021-03-19 | Gas seal column pump for elevated temperature applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117295896A true CN117295896A (en) | 2023-12-26 |
Family
ID=83284323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180098165.5A Pending CN117295896A (en) | 2021-03-18 | 2021-03-19 | Gas seal column pump for high temperature applications |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220299033A1 (en) |
| EP (1) | EP4308818A1 (en) |
| KR (1) | KR20230166097A (en) |
| CN (1) | CN117295896A (en) |
| WO (1) | WO2022197302A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3255702A (en) * | 1964-02-27 | 1966-06-14 | Molten Metal Systems Inc | Hot liquid metal pumps |
| US3513942A (en) * | 1967-11-27 | 1970-05-26 | Teikoku Denki Seisakusho Kk | Device for lubricating a bearing for use in a canned motor pump and an agitator |
| US4065232A (en) * | 1975-04-08 | 1977-12-27 | Andrew Stratienko | Liquid pump sealing system |
| SU1216449A1 (en) * | 1984-02-03 | 1986-03-07 | Специальное Конструкторско-Технологическое Бюро Промысловой Геофизики | System of controlling and regulating vertical pump sealing |
| JPH02215999A (en) * | 1989-02-15 | 1990-08-28 | World Chem:Kk | Vertical pump |
| RU2140577C1 (en) * | 1998-04-06 | 1999-10-27 | Открытое акционерное общество Научно-производственное объединение "Искра" | Centrifugal compressor |
| RU57846U1 (en) * | 2005-05-24 | 2006-10-27 | Закрытое акционерное общество "Гидрогаз" | SEALED PUMP |
| US9528520B2 (en) * | 2013-11-26 | 2016-12-27 | Beacon Technical Systems, Llc | Test and monitoring system for a dual sump pump system |
| WO2020106879A1 (en) * | 2018-11-19 | 2020-05-28 | Smart E, Llc | Lubrication-free centrifugal compressor |
-
2021
- 2021-03-18 US US17/205,124 patent/US20220299033A1/en not_active Abandoned
- 2021-03-19 WO PCT/US2021/023072 patent/WO2022197302A1/en active Application Filing
- 2021-03-19 EP EP21931894.6A patent/EP4308818A1/en active Pending
- 2021-03-19 CN CN202180098165.5A patent/CN117295896A/en active Pending
- 2021-03-19 KR KR1020237035737A patent/KR20230166097A/en active Search and Examination
Also Published As
| Publication number | Publication date |
|---|---|
| KR20230166097A (en) | 2023-12-06 |
| WO2022197302A1 (en) | 2022-09-22 |
| US20220299033A1 (en) | 2022-09-22 |
| EP4308818A1 (en) | 2024-01-24 |
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