CN214693524U - Mechanical seal cooling water supply device for pump of refining device - Google Patents
Mechanical seal cooling water supply device for pump of refining device Download PDFInfo
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- CN214693524U CN214693524U CN202120514000.9U CN202120514000U CN214693524U CN 214693524 U CN214693524 U CN 214693524U CN 202120514000 U CN202120514000 U CN 202120514000U CN 214693524 U CN214693524 U CN 214693524U
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Abstract
The utility model discloses a mechanical seal cooling water feeding mechanism for refining and chemical device pump, including the storage water tank that has demineralized water, the water tank has the demineralized water pump through a pipe connection, the demineralized water pump has the cooler through No. two pipe connections, the cooler has the filter through No. three pipe connections, the filter inserts the user side through No. four pipelines, has avoided equipment because the water consumption is little, and the short circuit appears in flow area is less, and the heat transfer effect descends, and the condition of super temperature even can be cleaner, stable to positions such as pump and motor bearing, sealed and mechanical seal system's cooler supply cooling water.
Description
Technical Field
The utility model relates to a cooling water supply device, more specifically say a bit, relate to a mechanical seal cooling water supply device for refining device pump, belong to the petrochemical field.
Background
Fig. 1 is a schematic diagram of a structure of a circulating water system in the prior art, fig. 2 is a schematic diagram of a flow of circulating water in the prior art, a traditional open circulating water system provides cooling water for a process medium cooler, a pump and motor bearing, and a cooler of a sealing and mechanical sealing system of a refining and chemical device, the system is very large and has a large number of users, one set of circulating water device pipeline generally covers a plurality of whole devices, even a whole plant, pipelines are very long and complex, and because of small water consumption and small flow area, short circuit, reduced heat exchange effect and even over-temperature are easy to occur in the coolers of the pump and motor bearing, the sealing and mechanical sealing system and the like. Once the cooling effect can not meet the process requirement, the equipment must be shut down and overhauled, besides increasing the maintenance cost, part of equipment which is operated by a single set can cause the fluctuation of the production operation of the device, even shut down, the problem of medium leakage to water of a process medium cooler carried by an open circulating water system can occur, once the system is polluted, the problems of blockage, scaling and the like of cooling water systems of a pump, a motor bearing, a cooler of a sealing and mechanical sealing system and the like can be immediately caused, and the equipment failure and even the operation fluctuation of the device can be caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the prior art problem, the utility model provides a mechanical seal cooling water supply device for pump of refining device, which has the technical characteristics of simple structure, can be stable to the positions such as pump and motor bearing, seal, etc. supply cooling water.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
the utility model provides a refinery unit mechanical seal cooling water feeding mechanism for pump, has the water tank of demineralized water including the storage, the water tank has the demineralized water pump through a pipe connection, the demineralized water pump has the cooler through No. two pipe connections, the cooler has the filter through No. three pipe connections, the filter inserts the user side through No. four pipelines.
Preferably, the water tank is connected with a fifth pipeline, the fifth pipeline and a second pipeline are connected in a gathering mode and extend to form a sixth pipeline, the first pipeline, the fifth pipeline and the sixth pipeline are connected with a first stop valve, and the sixth pipeline is connected with a cooler.
Preferably, No. six pipeline end branches are equipped with No. two sub-pipelines in addition, every all be connected with a cooler on the sub-pipeline, be connected with a No. two stop valves on the sub-pipeline at cooler both ends respectively, every cooler all links with circulating water pipeline.
Preferably, the first sub-pipeline is connected with the third pipeline after being converged, two second sub-pipelines are arranged at the tail end of the third pipeline, each second sub-pipeline is connected with a filter, and the second sub-pipelines at the two ends of the filter 7 are respectively connected with a third stop valve.
Preferably, No. two sub-pipelines collect the back and are connected with No. four pipelines, No. four pipeline end branches are equipped with No. two No. three sub-pipelines, all be connected with No. four stop valves on No. three sub-pipelines, still connect pneumatic valve just on one of them No. three sub-pipelines pneumatic valve is located between No. four stop valves.
Preferably, the upper end of the water tank is close to and is connected with a demineralized water replenishing pipeline, the demineralized water replenishing pipeline is communicated with a second pipeline through a pipeline, and the lower end of the water tank is close to and is connected with a water outlet pipeline.
Preferably, the water tank 1 is further connected with a water tank overflow port pipeline.
Preferably, a seventh pipeline and an eighth pipeline which are provided with valves are further connected to the lower end of the water tank, the seventh pipeline is used for connecting heating steam, and the eighth pipeline is used for discharging condensate to a mechanical sealing system.
Preferably, all be connected with the TG thermometer that is used for monitoring the temperature on water tank, No. six pipelines, No. four pipelines, be close to be connected with the PG thermometer that is used for monitoring pressure on No. two pipelines of demineralized water pump outlet department.
Preferably, the upper end of the water tank is provided with an access hole and a vent hole.
Has the advantages that: 1. the cooling water of the cooler of the pump and motor bearing, seal and mechanical seal system on the refining device is thoroughly separated from the cooling water system of the process medium cooler, and the conditions that the heat exchange effect is reduced and even the temperature is over-high due to the fact that the water consumption of the equipment is small, the circulation area is small, and short circuit occurs are avoided.
2. The use of the demineralized water with better water quality for closed circulating supply can avoid the reduction of the heat exchange effect caused by scaling, blockage and the like of fine pipelines caused by the deterioration of the water quality of the open circulating water, and reduce the maintenance frequency of equipment.
3. The device is provided with equipment such as a cooler, a filter, a valve and the like, and can supply cooling water to parts such as the cooler of a pump, a motor bearing, a seal and mechanical seal system more cleanly and stably.
4. The device is more environment-friendly, and the problems of equipment replacement, discharge and the like of the whole circulating water system after the process medium cooler leaks oil channeling are avoided.
Drawings
Fig. 1 is a schematic diagram of a circulating water system in the prior art.
Fig. 2 is a schematic diagram of a prior art circulating water flow.
FIG. 3 is a schematic view of the flow structure of the present invention
Detailed Description
The present invention will be further described with reference to the drawings attached to the specification, but the present invention is not limited to the following embodiments.
The technical characteristics are as follows: a mechanical seal cooling water supply device for a pump of an refining device is a device for providing cooling water for coolers of a pump, a motor bearing, a seal and a mechanical seal system of the refining device, and realizes the thorough separation of the cooling water at the parts and a cooling water system of a process medium cooler. Through the airtight circulation supply of the better demineralized water of using quality of water, effectively stop pump and motor bearing, sealed and mechanical seal system's cooler etc. because the water consumption is little, the short circuit appears in the flow area is less, and the heat transfer effect descends, the condition of overtemperature even. Belongs to the field of petrochemical industry.
The traditional pump uses the mechanical seal cooling water supply flow:
as shown in fig. 1 and 2, the conventional open circulating water system provides cooling water for the process medium coolers, pump and motor bearings, and the coolers of the sealing and mechanical sealing systems of the refinery plant, the system is very large and has a large number of users, one set of circulating water pipeline generally covers a plurality of sets of devices, even the whole plant, and the pipeline is very long and complicated.
Traditional recirculating cooling water system:
as shown in fig. 1 and 2, the circulating hot water (43 ℃, 0.25MPa) from each device is collected by a system pipe network and enters a circulating water field, the hot water directly enters a cooling tower by using the rest pressure, the hot water is scattered into water drops in the tower body by a water distribution system and flows from top to bottom, air flows from bottom to top, and the heat in the water is taken away by the evaporation of the water and the heat transfer of the air and the water, so that the water temperature is reduced to 33 ℃. The cooled circulating cold water enters a water tank at the bottom of the tower, then automatically flows into a water suction tank, and is pressurized and conveyed to various process medium cold exchange equipment, pumps, motor bearings, a cooler of a sealing and mechanical sealing system and the like of the device (0.55MPa) by a circulating cooling water feeding pump for recycling.
The salt content in the circulating water system is increased due to water loss caused by evaporation, blowing, pollution discharge, system leakage and the like in the circulating cooling process, and in order to stabilize the water quality, the circulating water make-up water adopts production feed water as make-up water, the make-up water accounts for about 2% of the designed water amount, and the reuse water of a sewage treatment plant can also be reused. Traditional recirculated cooling water processing system:
the treatment of the cooling water mainly comprises the following steps: removing suspended matters, stabilizing water quality, controlling bacteria and algae, etc.
The parameters of the traditional open circulating water are as follows:
TABLE 1 circulating Water quality parameters
TABLE 2 circulating Water operating parameters
In daily operation, because the traditional circulating cooling water system is huge, the problems that a runner becomes small, system impurities block pipelines and the like can occur in the local part of a water using device after the traditional circulating cooling water system is operated for half a year generally. The process medium cooler has large water consumption, large circulating water circulation and slow reduction of cooling effect. And because the water consumption is little, and flow area is less for pump and motor bearing, sealed and mechanical seal system's cooler etc. the short circuit appears very easily, and the heat transfer effect descends, and the condition of overtemperature even in case the cooling effect can not reach the technology demand, just must shut down the maintenance to these equipment, except having increased the maintenance cost, the equipment of partial single set operation still can arouse the undulant of device production operation, even shut down.
The application discloses a device (for short, demineralized water station) for centralized closed circulating water supply of equipment with small water consumption, such as a cooler of a pump, a motor bearing, a sealing system and a mechanical sealing system, wherein the device uses demineralized water with better water quality as circulating cold water, and stably supplies water to the pump, the motor bearing, the cooler of the sealing system and the mechanical sealing system through pressurization of a pump, so that complete separation from open circulating water cooling is realized, the problems of short circuit and reduction of heat exchange effect caused by multiple water consumption points are fundamentally avoided, the cooling effect of all water consumption points is normal after the device is used for one year, the operation of the device is stable, and the reduction of any heat exchange effect is avoided.
Specifically, the method comprises the following steps: as shown in fig. 3, a specific embodiment of a mechanical seal cooling water supply device for a refinery unit pump is provided, which includes a water tank 1 storing demineralized water, the water tank 1 is connected to a demineralized water pump 3 through a first pipeline 2, the demineralized water pump 3 is connected to a cooler 5 through a second pipeline 4, the cooler 5 is connected to a filter 7 through a third pipeline 6, and the filter 7 is connected to a user end through a fourth pipeline 8;
the water tank is connected with a fifth pipeline 9 on the water tank 1, the fifth pipeline 9 and a second pipeline 4 are connected in a gathering mode and extend to form a sixth pipeline 10, the first pipeline 2, the fifth pipeline 9 and the sixth pipeline 10 are connected with a stop valve 1.1, and the sixth pipeline 10 is connected with the cooler 5.
The tail end of the No. six pipeline 10 is provided with another two No. one sub pipelines 2.1, each No. one sub pipeline 2.1 is connected with a cooler 5, the No. two sub pipelines 2.1 at the two ends of the cooler 5 are connected with a No. two stop valves 1.2 respectively, and each cooler 5 is connected with a circulating water pipeline;
the first sub-pipeline 2.1 is connected with a third pipeline 6 after being converged, the tail end of the third pipeline 6 is provided with two second sub-pipelines 2.2, each second sub-pipeline 2.2 is connected with a filter 7, and the second sub-pipelines 2.2 at the two ends of the filter 7 are respectively connected with a third stop valve 1.3;
no. two sub-pipeline 2.2 collect the back and be connected with No. four pipeline 8, No. four pipeline 8 end branch is equipped with two No. three sub-pipeline 3.3, all be connected with No. four stop valve 1.4 on No. three sub-pipeline 3.3, still connect pneumatic valve 11 on one of them No. three sub-pipeline 3.3 just pneumatic valve 11 is located between No. four stop valve 1.4.
As shown in figure 3, the device stores desalted water by utilizing a water tank 1, the desalted water is pressurized by a desalted water pump 3, the temperature is reduced to 38 ℃ by a plate cooler 5 (plate cooler), mechanical impurities are filtered by a filter 7 (basket filter), and then the water supply flow is regulated by a flow control regulating valve, so that the water consumption of the pump, a motor bearing, a cooler of a sealing and mechanical sealing system and the like is ensured, and the required cooling effect is achieved. The desalting water pump, the plate cooler and the basket filter are all designed in one-on-one mode, so that the requirement of single cutting treatment or cleaning can be met, and the long-term use of the device is ensured.
The demineralized water parameters in this application:
TABLE 3 demineralized water quality parameters
TABLE 4 demineralized water operating parameters
Preferably, a demineralized water replenishing pipeline 12 is connected to the upper end of the water tank 1, the demineralized water replenishing pipeline 12 is communicated with the second pipeline 4 through a pipeline, and a water outlet pipeline 13 is connected to the lower end of the water tank 1; the water tank 1 is also connected with a water tank overflow port pipeline 14. When the quality of the closed circulating desalted water is poor or a medium such as lubricating oil leaks into the tank to cause pollution, the water tank can be replaced by water replenishing, water draining and overflowing.
Taking the example of a single set of 1000 ten thousand tons/year atmospheric pressure reduction device, the design parameters of the device (a mechanical seal cooling water supply device for a refining device pump) are as follows:
inlet pressure of the demineralized water pump: normal pressure demineralized water pump lift: 85 m;
normal water supply amount: 110m3H; rated water supply: 125m3/h；
The system water supply pressure: 0.6MPa (G) feed water temperature: 38 ℃;
water return pressure: 0.2MPa (G) backwater temperature: 50 ℃;
volume of the water tank: 18m3。
Preferably, a seventh pipeline 15 and an eighth pipeline 16 with valves are further connected to the lower end of the water tank 1, the seventh pipeline 15 is used for connecting heating steam, and the eighth pipeline 16 is used for discharging condensate to a mechanical sealing system.
Preferably, all be connected with the TG thermometer that is used for monitoring the temperature on water tank 1, No. six pipeline 10, No. four pipeline 8, be close to be connected with the PG thermometer that is used for monitoring pressure on No. two pipeline 2 of 3 exit ends departments of demineralized water pump, 7 both ends of filter are equipped with the pressure differential monitoring point, and the pressure remote transmission is realized to the pressure differential monitoring point, links it to the governing valve (including stop valve, pneumatic valve) on, realizes the automatically regulated of governing valve.
Preferably, the upper end of the water tank 1 is provided with an access hole and a vent hole.
The technical requirements of the device are as follows:
1. the device (a mechanical seal cooling water supply device for a refinery device pump) is integrally skid-mounted, and can be used for cooling a pump and motor bearing, a seal and a mechanical seal system cooler of a single refinery device or a combined device arranged in one area.
2. The device satisfies outdoor no canopy and arranges, and all equipment all install on a public joint base, adopt the welding base, are equipped with little tilting flowing back panel, collecting tank, lift by crane lug and grout hole to have at least G1 "interface and can supply to concentrate row congeals.
3. The cooler in the device is of a double-link plate type, the support is made of carbon steel, the material of the overflowing parts such as the plate sheets is 316L stainless steel, and the thickness of the plate sheets is not lower than 0.6 mm. The circulating water cooling is adopted, a pressure indicator is arranged on a cooling water inlet pipeline of the cooler, and a temperature indicator and a flow window are arranged on an outlet pipeline. The cooler is considered according to the backwater temperature of the desalted water being 50 ℃ and the water supply temperature being 38 ℃, and the heat load of a single cooler is reserved with 50 percent of allowance.
4. The water supply port of the device is provided with two full stainless steel (304) basket type filters (behind a plate cooler), the filtering precision of the filter core is 125 mu m, a front cut-off valve and a rear cut-off valve are arranged, the switching use requirement is met, and the flow area of the filters is considered according to the simultaneous working of the two pumps.
5. The water tank is provided with an in-situ temperature indicator, an in-situ liquid level indicator and a liquid level transmitter. The on-site liquid level meter uses a double-color glass plate, the highest and the lowest operating liquid levels are marked on the on-site liquid level meter, and the material of the water tank is 304 stainless steel. The volume of the water tank should be sufficient for 10 minutes of operation of the water station.
6. All interfaces to the system are flanged to the base edge, and all lines within the base are prefabricated and installed. All pipelines of the device are 304 seamless steel pipes (the pressure grade is not lower than PN20), and the pipe fittings and flanges are made of 304 stainless steel. All valves in the water station contain regulating valves: the valve body is made of carbon steel, and the valve core is made of stainless steel.
7. The pipeline system in the device is provided with low-point condensate discharging and high-point emptying facilities. The inlets of the two water pumps are separately led out from the water tank. A stop valve is added at the return port, and an anti-flushing baffle is arranged at the return pipe port in the water tank.
8. The pump outlet return line is designed according to the 100% flow of a single pump. The piping and equipment should be designed and arranged for easy access and disassembly. The valve operating position, the instrument monitoring position, the equipment maintenance position, the flange connection position and the like are arranged to be easy to access.
The method comprises the following operation steps:
1. checking that the device is installed and all process connection pipes are correctly connected; the electric cable is correctly connected, and the electric equipment is debugged; and (5) installing the instrument equipment in place and completing debugging.
2. Fill water through demineralized water moisturizing line to the water tank, open the outlet simultaneously and wash the water tank clean.
3. When the liquid level reaches 70%, the demineralized water pump flushing system is started, and replacement can be continued through the overflow of the water tank.
4. When the system is flushed, the brine removal pump is stopped, and all water in the water tank which is flushed and replaced for the first time is discharged completely.
5. Supplementing the demineralized water to 70%, starting a demineralized water pump, and putting the water utilization equipment one by one along the water supply flow of the device, wherein the cooling effect of the put equipment is checked to be normal when adding one water utilization equipment.
6. The water consumption points are confirmed to be used, the flow control regulating valve (including a stop valve and a pneumatic valve) of the device is used for regulating the flow to a required value, and the flow control regulating valve is used for automatic control.
7. The water tank liquid level needs to be checked in daily inspection, and the water tank low liquid level caused by leakage and the like is prevented from causing the evacuation of a demineralized water pump, so that the water using equipment is over-temperature.
Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (10)
1. The utility model provides a mechanical seal cooling water feeding mechanism for refining device pump which characterized in that: including water tank (1) that the storage has demineralized water, water tank (1) is connected with demineralized water pump (3) through pipeline (2), demineralized water pump (3) are connected with cooler (5) through No. two pipeline (4), cooler (5) are connected with filter (7) through No. three pipeline (6), filter (7) insert the user end through No. four pipeline (8).
2. The mechanical seal cooling water supply device for the refining device pump according to claim 1, characterized in that: be connected with No. five pipeline (9) on water tank (1), No. five pipeline (9) collect with No. two pipeline (4) and are connected and extend and have No. six pipeline (10), all be connected with stop valve (1.1) on pipeline (2), No. five pipeline (9), No. six pipeline (10) are connected with cooler (5).
3. The mechanical seal cooling water supply device for the refining device pump according to claim 2, characterized in that: no. six pipeline (10) end branch is equipped with one other two sub-pipeline (2.1), every all be connected with a cooler (5) on one sub-pipeline (2.1), be connected with No. two stop valves (1.2) on one sub-pipeline (2.1) at cooler (5) both ends respectively, every cooler (5) all link has circulating line.
4. The mechanical seal cooling water supply device for the refining device pump according to claim 3, characterized in that: a sub-pipeline (2.1) collect the back and be connected with No. three pipeline (6), No. three pipeline (6) end branch is equipped with two No. two sub-pipelines (2.2), every all be connected with a filter (7) on No. two sub-pipelines (2.2), be connected with a No. three stop valve (1.3) on No. two sub-pipelines (2.2) at filter (7) both ends respectively.
5. The mechanical seal cooling water supply device for the refining device pump according to claim 4, characterized in that: no. two sub-pipeline (2.2) collect the back and be connected with No. four pipeline (8), No. four pipeline (8) end branch is equipped with two No. three sub-pipeline (3.3), all be connected with No. four stop valve (1.4) on No. three sub-pipeline (3.3), still connect pneumatic valve (11) just on one of them No. three sub-pipeline (3.3) pneumatic valve (11) are located between No. four stop valve (1.4).
6. A mechanical seal cooling water supply apparatus for a refinery unit pump according to claim 1, 2, 3, 4 or 5, wherein: be close to water tank (1) upper end is connected with demineralized water moisturizing pipeline (12), demineralized water moisturizing pipeline (12) are through pipeline and No. two pipeline (4) intercommunication, are close to water tank (1) lower extreme is connected with outlet pipe way (13).
7. The mechanical seal cooling water supply device for the refining device pump according to claim 6, characterized in that: the water tank (1) is also connected with a water tank overflow port pipeline (14).
8. A mechanically sealed cooling water supply apparatus for a refinery unit pump according to claim 1, 2, 3, 4, 5 or 7, wherein: and a seventh pipeline (15) and an eighth pipeline (16) which are provided with valves are further connected to the lower end of the water tank (1), the seventh pipeline (15) is used for connecting heating steam, and the eighth pipeline (16) is used for discharging condensate to a mechanical sealing system.
9. A mechanical seal cooling water supply apparatus for a refinery unit pump according to claim 2, 3, 4 or 5, characterized in that: the water tank (1), the pipeline (10) six and the pipeline (8) four are all connected with a TG thermometer for monitoring temperature, and the water tank is close to the pipeline (2) at the outlet end of the desalting water pump (3) and is connected with a PG thermometer for monitoring pressure.
10. The mechanical seal cooling water supply device for the refining device pump according to claim 1, characterized in that: and the upper end of the water tank (1) is provided with an access hole and a vent hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120514000.9U CN214693524U (en) | 2021-03-11 | 2021-03-11 | Mechanical seal cooling water supply device for pump of refining device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120514000.9U CN214693524U (en) | 2021-03-11 | 2021-03-11 | Mechanical seal cooling water supply device for pump of refining device |
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| CN214693524U true CN214693524U (en) | 2021-11-12 |
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| CN202120514000.9U Active CN214693524U (en) | 2021-03-11 | 2021-03-11 | Mechanical seal cooling water supply device for pump of refining device |
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2021
- 2021-03-11 CN CN202120514000.9U patent/CN214693524U/en active Active
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