CN213266393U - Atmospheric tower desalination process system - Google Patents
Atmospheric tower desalination process system Download PDFInfo
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- CN213266393U CN213266393U CN202021180383.2U CN202021180383U CN213266393U CN 213266393 U CN213266393 U CN 213266393U CN 202021180383 U CN202021180383 U CN 202021180383U CN 213266393 U CN213266393 U CN 213266393U
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Abstract
The utility model provides a normal pressure tower desalination process system, including the normal pressure tower, first booster pump, heat exchanger, the first flow control system that loop through the pipe connection and arrive the normal pressure tower again, connect in parallel in first flow control system and connect gradually filtration system, second flow control system, turbulent mixer, extraction separator, oil water separator, first pressure boost conveying system through the pipeline from its left end to right-hand member, turbulent mixer still has softened water system through the pipeline intercommunication, oil water separator's lower extreme intercommunication has sewage treatment system; the oil liquid after being filtered and purified quickly dissolves salt in the oil liquid in the extraction separator, and oil-water separation is quickly and efficiently realized through the oil-water separator; be equipped with and deposit jar and feed through sewage treatment system, the separated salt-containing sewage storage subsides in the storage jar, avoids salt-containing sewage to mix the discharge with fluid once more, and the salt-containing sewage that subsides simultaneously is discharged sewage treatment system and is handled, green.
Description
Technical Field
The utility model belongs to the technical field of atmospheric tower desalination processing technique and specifically relates to atmospheric tower desalination process systems.
Background
Under the influence of the properties of raw materials and operating conditions, the content of chloride ions in the atmospheric top circulation systems of the No. 4 atmospheric and vacuum distillation unit and the No. 5 atmospheric and vacuum distillation unit of the Ministry of petrochemical and Ministry of petrochemical industry is always higher, the tower top has a more serious salt deposition corrosion phenomenon, the corrosion prevention pressure of the upper system of the atmospheric tower is high, and the long-period operation of the device is influenced.
Aiming at serious salt deposition and corrosion of a circulating system at the top of the atmospheric tower, the main measures adopted at home at present are as follows:
(1) the coating is anticorrosive, the material quality is upgraded, the welding seam quality is improved, and the corrosion resistance is improved;
(2) the process conditions are improved, and the amount of condensed water in a top circulating system is reduced;
(3) the quality of the raw oil is improved, and the upstream electric desalting effect is enhanced;
(4) back flushing the tower tray and the pipeline of the atmospheric tower;
(5) adding a corrosion inhibitor;
(6) strengthening online monitoring;
the measures have some effects in different degrees, and the corrosion degree of the equipment can be reduced and the operation period of the device can be prolonged by implementing several measures. However, in view of several countermeasures, we can see that the change of the process operating conditions is realized by increasing the extraction temperature of the circulating oil product, but the operating conditions are limited by many factors, and the operation flexibility is not large. For the following measures, the corrosion degree is weakened by reinforcing equipment at the later stage when the tower tray is replaced, the pipeline material is replaced, the local equipment is reinforced, and the like, but the corrosion of the equipment still exists, only the corrosion speed is slowed down, and the problem is not solved from the corrosion source. On the other hand, replacing the tray and selecting the pipeline made of higher grade material greatly increases the equipment investment cost, and the equipment still corrodes the perforation after a period of time, and then the equipment is stopped and replaced, which is only a temporary alleviating method but not a fundamental means for solving the problem.
Three injection lines (ammonia injection, corrosion inhibitor injection and water injection) are arranged on the atmospheric and pressure tower top of most of Chinese petrochemical refineries to relieve the problems of salt deposition and corrosion on the tower top, when the operation of the tower is difficult to stabilize, intermittent water injection is carried out to wash the tower, the ammonia is injected to adjust the PH, and the corrosion inhibitor is injected to reduce the corrosion of equipment. The requirement for stable operation is likewise not met.
In conclusion, the research and development of an advanced, reliable, economic, reasonable and environment-friendly normal pressure tower desalting process system has important practical significance.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a normal pressure tower desalination process system.
In order to achieve the above purpose, the utility model discloses a realize through following technical scheme:
the normal pressure tower desalting process system comprises a normal pressure tower, a first booster pump, a heat exchanger and a first flow control system which are sequentially connected through pipelines and then the normal pressure tower, namely, oil liquid from the normal pressure tower passes through the first booster pump, the heat exchanger and the first flow control system and then returns to the normal pressure tower, and the oil liquid is circularly conveyed in the way; the system is characterized in that the system is connected in parallel with the first flow control system, and is sequentially connected with a filtering system, a second flow control system, a turbulent mixer, an extraction separator, an oil-water separator and a first pressurizing conveying system from the left end to the right end of the system through pipelines, namely a branch pipeline is arranged on a pipeline at the left end before oil enters the first flow control system and is communicated with the branch pipeline, so that part of the oil does not flow through the first flow control system but flows through the filtering system, the second flow control system, the turbulent mixer, the extraction separator, the oil-water separator and the first pressurizing conveying system in sequence, and then flows into the atmospheric tower; the turbulent mixer is also communicated with a softened water system through a pipeline provided with a third flow control system and a second pressurizing and conveying system, the lower end of the oil-water separator is communicated with a storage tank, and the storage tank is communicated with a sewage treatment system through a pipeline provided with a fourth flow control system.
Further, the filtering system comprises two basket filters connected in parallel through a pipeline; 2 basket filters are arranged and used simultaneously, so that the filtering effect is enhanced, when one basket filter is blocked by impurities, the other basket filter can be used for filtering, and blow-down valves are arranged at the bottoms of the 2 basket filters and discharge the filtered impurities from the basket filters through pipelines.
Furthermore, a first gate valve and a second gate valve are arranged on pipelines at two ends of the basket filter, so that the basket filter is convenient to overhaul; and a drain valve is arranged on the pipeline between the basket filter and the second gate valve, so that residual liquid in the pipeline can be conveniently discharged completely when the machine is stopped and overhauled.
Furthermore, the oil-water separator comprises a shell and a separation core pipe arranged in the middle of the inside of the shell, and a sewage discharge outlet and the storage tank are respectively arranged outside the shell at the left end and the right end of the separation core pipe; the separation core pipe increases the contact of water drops and partial unextracted salt ions, realizes the secondary deep extraction separation of the salt ions dispersed in the oil, and is provided with the sewage discharge port for facilitating the sewage discharge.
Furthermore, the first flow control system, the second flow control system, the third flow control system and the fourth flow control system all comprise regulating valves, third gate valves and fourth gate valves on pipelines at the left end and the right end of each regulating valve, purge valves on pipelines between the third gate valves and the regulating valves, and fifth gate valves connected with the third gate valves and the fourth gate valves in parallel through pipelines; the third gate valve and the fourth gate valve are arranged to facilitate the replacement of the regulating valve during maintenance, the purge valve is arranged to facilitate the clean discharge of residual liquid in a pipeline during shutdown maintenance, the fifth gate valve is arranged to prevent liquid from passing through the regulating valve during replacement of the regulating valve, and the fifth gate valve provides an emergency passage for the circulation of the liquid, so that the liquid circulation in the whole system is prevented from being influenced; second flow control system with among the third flow control system the governing valve all is equipped with flow indication adjusting instrument, fourth flow control system the governing valve is equipped with liquid level indication adjusting instrument, flow indication adjusting instrument with liquid level indication adjusting instrument all is connected with this system's control system, passes through promptly second flow control system with the steerable flow of third flow control system advances the fluid of turbulent mixer and the proportion of demineralized water to reach better desalination effect, thereby the steerable follow of fourth flow control system the sewage that flows out in the storage jar reaches control the liquid level of storage jar, make the inside sewage of storage tank reaches certain volume and just is discharged out.
Furthermore, the first pressurized conveying system and the second pressurized conveying system respectively comprise a sixth gate valve, a second pressurized pump, a check valve, a purge valve and a seventh gate valve which are sequentially connected through pipelines; be equipped with the sixth gate valve with change when the convenient maintenance of seventh gate valve the second booster pump with the check valve is equipped with the check valve prevents liquid backward flow.
Furthermore, a third pressurized conveying system and a fourth pressurized conveying system are respectively connected with the first pressurized conveying system and the second pressurized conveying system in parallel through pipelines; the third pressurized conveying system and the fourth pressurized conveying system are the same as the first pressurized conveying system and the second pressurized conveying system, the third pressurized conveying system and the fourth pressurized conveying system are closed at ordinary times, and the third pressurized conveying system and the fourth pressurized conveying system are opened only when the first pressurized conveying system and the second pressurized conveying system are in failure or are overhauled, so that the whole system can normally run.
Further, the extraction separator and the oil-water separator are provided with vent holes; the vent is arranged for protecting equipment, the pressure can be quickly released and the vent is emptied in case of emergency, and meanwhile, if the system needs to be purged in the process of maintenance, the vent can be used for discharging.
Further, a steam purge line is arranged between the filtering system and the second flow control system; clean the impurities in the pipeline, prevent the pipeline from being blocked and avoid polluting the liquid circulating in the pipeline.
Furthermore, a first pressure remote transmission indicating instrument is arranged on a pipeline between the second flow control system and the turbulent mixer, a second pressure remote transmission indicating instrument is arranged on a pipeline between the oil-water separator and the first pressurizing and conveying system, and a differential pressure transmitter is connected between the first pressure remote transmission indicating instrument and the second pressure remote transmission indicating instrument; the pressure difference of the inlet and the outlet of the system is monitored in real time, and the pressure drop in the desalting system is mastered.
The utility model has the advantages that: the device is provided with a filtering system, a turbulent mixer, an extraction separator and an oil-water separator, so that the filtered and impurity-removed oil can quickly dissolve salt in the oil in the extraction separator, and the oil-water separator can settle by using the principles of coarse granulation and corrugation strengthening, thereby quickly and efficiently realizing oil-water separation; be equipped with storage jar and feed through sewage treatment system, the separated salt-containing sewage storage subsides in storage jar, avoids salt-containing sewage to mix the discharge with fluid once more, has increased the oil-water separation space, makes oil-water separation more abundant, and the salt-containing sewage that subsides simultaneously is discharged sewage treatment system and is handled, green.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. an atmospheric tower; 2. a first booster pump; 3. a heat exchanger; 4. a first flow control system; 5. a second flow control system; 6. a third flow control system; 7. a fourth flow control system; 8. a first pressurized transport system; 9. a second pressurized delivery system; 10. a steam purge line; 11. a basket filter; 12. a first gate valve; 13. a second gate valve; 14. a turbulent mixer; 15. an extraction separator; 16. an oil-water separator; 17. separating the core pipe; 18. a vent port; 19. a sewage draining outlet; 20. storing the tank; 21. a first pressure remote indicating instrument; 22. a second pressure remote indicating instrument; 23. a differential pressure transmitter; 24. a second booster pump; 25. a blowoff valve; 26. a third pressurized transport system; 27. a fourth pressurized transport system; 28. a softened water system; 29. a sewage treatment system; 30. a check valve; 31. a sixth gate valve; 32. a seventh gate valve; 41. a third gate valve; 42. a fourth gate valve; 43. a purge valve; 44. a fifth gate valve; 51. a flow indicating regulating instrument; 71. the liquid level indicates the regulator.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 1, the desalination process system of the atmospheric tower 1 comprises the atmospheric tower 1, a first booster pump 2, a heat exchanger 3, and a first flow control system 4 which are connected in sequence through a pipeline and then enter the atmospheric tower 1, that is, oil liquid from the atmospheric tower 1 passes through the first booster pump 2, the heat exchanger 3, and the first flow control system 4 and then returns to the atmospheric tower 1, and the above steps are circularly transported; the system is connected in parallel with the first flow control system 4, and is sequentially connected with a filtering system, a second flow control system 5, a turbulent mixer 14, an extraction separator 15, an oil-water separator 16 and a first pressurizing delivery system 8 from the left end to the right end of the system through pipelines, namely a branch pipeline is arranged on a pipeline at the left end before oil enters the first flow control system 4 and is communicated with the branch pipeline, so that part of the oil does not flow through the first flow control system 4 but flows through the filtering system, the second flow control system 5, the turbulent mixer 14, the extraction separator 15, the oil-water separator 16 and the first pressurizing delivery system 8 in sequence, and then flows into the atmospheric tower 1; the turbulent mixer 14 is also communicated with a softened water system 28 through a pipeline provided with the third flow control system 6 and the second pressurized conveying system 9, the lower end of the oil-water separator 16 is communicated with a storage tank 20, and the storage tank 20 is communicated with a sewage treatment system 29 through a pipeline provided with the fourth flow control system 7.
The filtering system comprises two basket filters 11 connected in parallel through a pipeline; 2 basket filters 11 are arranged and used simultaneously, so that the filtering effect is enhanced, when one basket filter 11 is blocked by impurities, the other basket filter 11 can be used for filtering, and blow-down valves 25 are arranged at the bottoms of the 2 basket filters 11, and the blow-down valves 25 discharge the filtered impurities from the basket filters 11 through pipelines.
A first gate valve 12 and a second gate valve 13 are arranged on pipelines at two ends of the basket filter 11, so that the basket filter 11 is convenient to overhaul; the drain valve 43 is arranged on the pipeline between the basket filter 11 and the second gate valve 13, so that residual liquid in the pipeline can be conveniently discharged completely during shutdown and maintenance.
The oil-water separator 16 comprises a shell and a separation core pipe 17 arranged in the middle of the inside of the shell, and a sewage discharge port 19 and a storage tank 20 are respectively arranged outside the shell at the left end and the right end of the separation core pipe 17; the separation core pipe 17 increases the contact between water drops and partial unextracted salt ions, realizes the secondary deep extraction separation of the salt ions dispersed in the oil, and is provided with a sewage discharge port 19 to facilitate the sewage discharge.
The first flow control system 4, the second flow control system 5, the third flow control system 6 and the fourth flow control system 7 respectively comprise a regulating valve, a third gate valve 41 and a fourth gate valve 42 on pipelines at the left end and the right end of the regulating valve, a purge valve 43 on a pipeline between the third gate valve 41 and the regulating valve, and a fifth gate valve 44 connected with the third gate valve 41 and the fourth gate valve 42 in parallel through pipelines; the third gate valve 41 and the fourth gate valve 42 are arranged to facilitate the replacement of the regulating valve during maintenance, the purge valve 43 is arranged to facilitate the clean discharge of residual liquid in the pipeline during shutdown maintenance, the fifth gate valve 44 is arranged to prevent liquid from passing through the regulating valve during the replacement of the regulating valve, and the fifth gate valve 44 provides an emergency passage for the circulation of the liquid, so that the liquid circulation in the whole system is prevented from being influenced; the regulating valves in the second flow control system 5 and the third flow control system 6 are provided with flow indication regulating instruments 51, the regulating valve of the fourth flow control system 7 is provided with a liquid level indication regulating instrument 71, the flow indication regulating instrument 51 and the liquid level indication regulating instrument 71 are connected with the control system of the system, namely, the proportion of oil and softened water flowing into the turbulent mixer 14 can be controlled by the second flow control system 5 and the third flow control system 6, so that a better desalting effect is achieved, the fourth flow control system 7 can control sewage flowing out of the storage tank 20 to reach the liquid level of the control storage tank 20, and the sewage in the storage tank 20 is discharged in a certain amount.
The first pressurized conveying system 8 and the second pressurized conveying system 9 both comprise a sixth gate valve 31, a second booster pump 24, a check valve 30, a purge valve 43 and a seventh gate valve 32 which are connected in sequence through pipelines; the sixth gate valve 31 and the seventh gate valve 32 are provided to facilitate replacement of the second booster pump 24 and the check valve 30 during maintenance, and the check valve 30 is provided to prevent liquid from flowing backward.
A third pressurized conveying system 26 and a fourth pressurized conveying system 27 are respectively connected with the first pressurized conveying system 8 and the second pressurized conveying system 9 in parallel through pipelines; the third and fourth pressurized delivery systems 26 and 27 are identical to the first and second pressurized delivery systems 8 and 9, and the third and fourth pressurized delivery systems 26 and 27 are normally closed and only open when the first and second pressurized delivery systems 8 and 9 fail or are repaired, so that the entire system can be normally operated.
The extraction separator 15 and the oil-water separator 16 are both provided with a vent 18; the vent 18 is arranged for protecting equipment, can quickly release pressure and vent in case of emergency, and can also be used for discharging by utilizing the vent 18 if the system needs to be purged in the process of maintenance.
A steam purge line 10 is arranged between the filtering system and the second flow control system 5; clean the impurities in the pipeline, prevent the pipeline from being blocked and avoid polluting the liquid circulating in the pipeline.
A first pressure remote transmission indicating instrument 21 is arranged on a pipeline between the second flow control system 5 and the turbulent mixer 14, a second pressure remote transmission indicating instrument 22 is arranged on a pipeline between the oil-water separator 16 and the first pressurizing and conveying system 8, and a differential pressure transmitter 23 is connected between the first pressure remote transmission indicating instrument 21 and the second pressure remote transmission indicating instrument 22; the pressure difference of the inlet and the outlet of the system is monitored in real time, and the pressure drop in the desalting system is mastered.
The utility model discloses a theory of operation does:
as shown in fig. 1, the oil in the atmospheric tower 1 passes through the first booster pump 2, the heat exchanger 3, the first flow control system 4 and then returns to the atmospheric tower 1, wherein a part of the oil flows through the heat exchanger 3 and then flows to the filtering system through the pipeline to be filtered and decontaminated, then flows into the turbulent mixer 14 according to a certain proportion under the control of the second flow control system 5, meanwhile, the softened water in the softened water system 28 passes through the second booster delivery system 9 and the third flow control system 6 and flows into the turbulent mixer 14 according to a certain proportion, then the oil is mixed with the softened water in the turbulent mixer 14 and enters the extraction separator 15 to rapidly dissolve the salt in the oil, then the oil-water separation is rapidly and efficiently realized through the oil-water separator 16, then the oil flows back to the atmospheric tower 1, so that the salt is removed circularly and the salt removing operation is performed for a period of time, the salt content of the oil in the atmospheric tower 1 is gradually reduced to a standard level, and the separated sewage flows into the storage tank 20 and is discharged to the sewage treatment system 29 through the fourth flow control system 7 for sewage treatment.
Compared with the prior art, the utility model discloses the beneficial effect who has does:
the device is provided with a filtering system, a turbulent mixer 14, an extraction separator 15 and an oil-water separator 16, so that the oil subjected to filtering and impurity removal can rapidly dissolve salt in the oil in the extraction separator 15, and can be settled by the oil-water separator 16 by using the principles of coarse granulation and corrugation strengthening, and oil-water separation can be rapidly and efficiently realized; be equipped with storage jar 20 and feed through sewage treatment system 29, the separated salt-containing sewage storage subsides in storage jar 20, avoids salt-containing sewage to mix with fluid discharge once more, has increased the oil-water separation space, makes oil-water separation more abundant, and the salt-containing sewage that subsides simultaneously is discharged sewage treatment system 29 and is handled, green.
The above is only the preferred embodiment of the present invention, and not the patent protection scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.
Claims (10)
1. Atmospheric tower desalination process systems, including atmospheric tower, first booster pump, heat exchanger, the first flow control system that loops through the pipe connection to atmospheric tower again, its characterized in that, connect in parallel in first flow control system has connected gradually filtration system, second flow control system, turbulent mixer, extraction separator, oil water separator, first pressure boost conveying system through the pipeline from its left end to the right-hand member, turbulent mixer still has softened water system through the pipeline intercommunication that is equipped with third flow control system and second pressure boost conveying system, oil water separator's lower extreme intercommunication is equipped with the storage jar, the storage jar has sewage treatment system through the pipeline intercommunication that is equipped with fourth flow control system.
2. The atmospheric tower desalination process system of claim 1, wherein the filtration system comprises two basket filters connected in parallel by a conduit.
3. The atmospheric tower desalination process system of claim 2, wherein the pipeline at the two ends of the basket filter is provided with a first gate valve and a second gate valve, and the pipeline between the basket filter and the second gate valve is provided with a purge valve.
4. The atmospheric tower desalination process system of claim 1, wherein the oil-water separator comprises a housing and a separation core tube disposed in the middle of the inside of the housing, and a drain outlet and the storage tank are disposed outside the housing at the left and right ends of the separation core tube, respectively.
5. The atmospheric tower desalination process system of claim 1, wherein the first flow control system, the second flow control system, the third flow control system, and the fourth flow control system each comprise a regulating valve, a third gate valve and a fourth gate valve on a pipeline at the left end and the right end of the regulating valve, a purge valve on a pipeline between the third gate valve and the regulating valve, and a fifth gate valve connected in parallel with the third gate valve and the fourth gate valve through a pipeline.
6. The atmospheric tower desalination process system of claim 1, wherein the first pressurized conveying system and the second pressurized conveying system each comprise a sixth gate valve, a second booster pump, a check valve, a purge valve, and a seventh gate valve connected in sequence by a pipeline.
7. The atmospheric tower desalination process system of claim 5, wherein a third pressurized transport system and a fourth pressurized transport system are connected in parallel with the first pressurized transport system and the second pressurized transport system, respectively, via pipes.
8. The atmospheric tower desalination process system of claim 1, wherein the extraction separator and the oil-water separator are each provided with a vent.
9. The atmospheric tower desalination process system of claim 1, wherein a steam purge line is provided between the filtration system and the second flow control system.
10. The atmospheric tower desalination process system of claim 1, wherein a first pressure remote indicator is disposed on a pipeline between the second flow control system and the turbulent mixer, a second pressure remote indicator is disposed on a pipeline between the oil-water separator and the first pressurized delivery system, and a differential pressure transmitter is connected between the first pressure remote indicator and the second pressure remote indicator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021180383.2U CN213266393U (en) | 2020-06-23 | 2020-06-23 | Atmospheric tower desalination process system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021180383.2U CN213266393U (en) | 2020-06-23 | 2020-06-23 | Atmospheric tower desalination process system |
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| CN213266393U true CN213266393U (en) | 2021-05-25 |
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| CN202021180383.2U Active CN213266393U (en) | 2020-06-23 | 2020-06-23 | Atmospheric tower desalination process system |
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