CN218392397U - Automatic control and monitoring system for primary saline-alkali mud filter press - Google Patents
Automatic control and monitoring system for primary saline-alkali mud filter press Download PDFInfo
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- CN218392397U CN218392397U CN202222592008.4U CN202222592008U CN218392397U CN 218392397 U CN218392397 U CN 218392397U CN 202222592008 U CN202222592008 U CN 202222592008U CN 218392397 U CN218392397 U CN 218392397U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model discloses a primary brine sludge filter press automatic control and monitoring system relates to primary brine treatment process technical field. The utility model discloses an increase feed liquor trip valve, technology wind trip valve, washing trip valve on salt mud pressure filter salt mud feed liquor pipeline, installation PLC controller passes through PLC control in oil pressure system, realize UNICOM between pressure filter salt mud feed liquor pressure and the oil pressure, accurate control pressure filter operational parameter, realize the pressure filter feed liquor, blow, washing key operation, the pressure filter filtration efficiency has been improved, salt mud contains the salt rate and reduces to 5 to 10%, the moisture content reduces to 40 to 45%, the salt water automated control level has been improved simultaneously, post intensity of labour has been reduced.
Description
Technical Field
The utility model relates to a brine treatment process technical field especially relates to a brine sludge filter press automatic control and monitoring system once.
Background
In the primary brine refining process, sodium hydroxide solution and sodium carbonate solution are used as refining agents, and the calcium and magnesium ions are removed by a method of generating magnesium hydroxide precipitate and calcium carbonate precipitate through the reaction with calcium and magnesium ions in brine in a crude brine tank. Calcium carbonate and magnesium hydroxide precipitate is discharged to a salt mud pool through a pre-processor, a kelvin membrane, a ceramic membrane and other filtering equipment, and slurry in the salt mud pool is conveyed to a plate-and-frame filter press through a salt mud pump to be subjected to filter pressing to form a mud cake and then is transported out for disposal.
At the present stage, the operations of liquid inlet, air blowing and water washing of the salt mud filter press in the chlor-alkali industry are manually controlled on site, and the mud discharging operation is manually controlled by a PLC; the filter press has the advantages of long feeding time, and operation of washing and blowing depending on experience without quantitative standards. At present, the PLC has a low control automation level and a large workload of personnel. Simultaneously, the salt mud pressure filter does not have online operation control, only leans on artifical discontinuity to patrol and examine in the daily production and carries out equipment running state monitoring, often because of the longer unable timely discovery of salt mud filter-pressing high pressure filter-pressing time, leads to appearing the filter plate high pressure and warp the scheduling problem. Influenced by manual operation and empirical operation factors, the salt content index of the salt slurry after filter pressing reaches 15 to 20 percent, and the water content reaches 50 to 60 percent, so that the waste of salt resources and the environmental pollution are caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a salt brine mud pressure filter automatic control and monitoring system once, with the PLC controller is compiled in the pressure filter operation, carries out data connection with PLC controller and DCS control module, adopts DCS control module to realize the pressure filter feed liquor, blow, wash a key operation, improves salt brine automated control level, reduces post intensity of labour.
In order to realize the technical purpose, the utility model adopts the following scheme:
the automatic control and monitoring system of the primary salt-water mud filter press comprises a PLC (programmable logic controller), a DCS (distributed control system) control module, a filter press, a salt-water mud pool, a salt-water mud pump, a washing pump and an air inlet pipe, wherein the filter press is connected with an oil pressure system; the salt mud pool is communicated with the filter press through a salt mud pump and a pipeline, the filter press is also connected with a washing pump and an air inlet pipe through a pipeline, a process air cut-off valve is arranged on the air inlet pipe, a washing cut-off valve is arranged on a connecting pipeline of the washing pump and the filter press, and a liquid inlet cut-off valve is arranged on a connecting pipeline of the salt mud pump and the filter press; the process air cut-off valve, the washing cut-off valve, the liquid inlet cut-off valve and the washing pump are respectively in communication connection with the DCS control module, the DCS control module is in communication connection with the PLC, and the PLC is connected with the oil pressure system.
Furthermore, the inlet of the filter press is connected with a liquid inlet pipeline, a remote transmission pressure gauge is arranged on the liquid inlet pipeline, and the remote transmission pressure gauge is in communication connection with the DCS control module.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses an increase feed liquor trip valve, technology wind trip valve, washing trip valve on salt mud pressure filter salt mud feed liquor pipeline, installation PLC controller passes through PLC control in oil pressure system, realize UNICOM between pressure filter salt mud feed liquor pressure and the oil pressure, accurate control pressure filter operational parameter, realize the pressure filter feed liquor, blow, washing key operation, the pressure filter filtration efficiency has been improved, salt mud contains the salt rate and reduces to 5 to 10%, the moisture content reduces to 40 to 45%, the salt water automated control level has been improved simultaneously, post intensity of labour has been reduced.
Drawings
Fig. 1 is a connection diagram of an automatic control and monitoring system of a primary saline-alkali mud filter press according to an embodiment of the present invention;
labeled in the figure as: 1. an oil pressure system; 2. a salt mud filter press; 3. a process air cut-off valve; 4. a water washing cut-off valve 5 and a process air inlet pipe; 6. a process air flow meter; 7. a water washing pump; 8. a PLC controller; 9. a salt mud pipe; 10. a liquid inlet cut-off valve; 11. a salt mud pump; 12. a salt mud pool; 13. washing the tube with water; 14. DCS control module.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and functions of the present invention, but the present invention is not limited thereto.
As shown in fig. 1, the utility model provides a pair of primary salt brine mud pressure filter automatic control and monitoring system comprises salt mud pressure filter 2, oil pressure system 1, technology wind air-supply line 5, technology wind trip valve 3, technology wind flowmeter 6, washing pump 7, washing pipe 13, washing trip valve 4, salt mud pond 12, salt mud pump 11, feed liquor trip valve 10, PLC controller 8 and DCS control module 14 etc.. Salt mud pond 12 passes through pipeline and 11 intercommunications of salt mud pump, and salt mud pump 11 passes through salt mud pipe 9 and 2 intercommunications of salt mud pressure filter, and oil pressure system 1 is connected to salt mud pressure filter 2, and oil pressure system 1 is connected with PLC control 8 ware, PLC control 8 and DCS control module 14 communication connection. And a liquid inlet cut-off valve 10 and a feeding remote pressure gauge are installed on the salt mud pipe 9, and the liquid inlet cut-off valve 10 and the feeding pressure gauge are respectively in communication connection with the DCS control module 14.
The salt mud filter press 2 is also connected with a process air inlet pipe 5 and a washing pipe 13, wherein the process air inlet pipe 5 is provided with a process air cut-off valve 3 and a process air flow meter 6, and the process air cut-off valve 3 and the process air flow meter 6 are respectively in communication connection with a DCS control module 14; the washing pipe 13 is provided with a washing pump 7 and a washing cut-off valve 4, and the washing pump 7 and the washing cut-off valve 4 are respectively in communication connection with the DCS control module 14. The salt mud filter press 2 adopts a plate-and-frame filter press or a box filter press.
Sediment, calcium carbonate and magnesium hydroxide generated in the coarse brine fine filtration process are precipitated and discharged into a salt mud pool, and are conveyed to a salt mud filter press 2 through a salt mud pump 11, after the salt mud filter press 2 operates for a period of time, the inlet liquid pressure of the filter press continuously rises, the upper limit value and the lower limit value of the inlet liquid pressure are set in a DCS control module 14, and the upper limit value and the lower limit value of the oil pressure of an oil pressure system are set in a PLC (programmable logic controller) 8.
The automatic control and monitoring method of the primary salt and mud filter press monitors the inlet pressure of the salt and mud filter press 2 in real time through the feeding remote transmission pressure gauge, the monitoring result is sent to the DCS control module 14, the PLC 8 transmits the oil pressure information to the DCS control module 14 after receiving the oil pressure system information, the DCS control module 14 carries out data processing analysis on the inlet pressure and the oil pressure system pressure respectively, the DCS control module 14 judges and controls the running state of the salt and mud filter press according to the data processing result, and the method comprises the following specific steps:
the method comprises the following steps that firstly, salt mud is conveyed to a salt mud filter press through a salt mud conveying pump, the liquid inlet pressure of the salt mud filter press continuously rises along with the operation of the salt mud filter press, when the liquid inlet pressure of the salt mud filter press is higher than the upper limit value of the set liquid inlet pressure or lower than the lower limit value of the set liquid inlet pressure, a DCS control module sends a command, a liquid inlet cut-off valve is closed, the salt mud filter press is discharged out of the system, and the operation of the second step is carried out;
or when the pressure regulating value of the oil pressure system of the salt mud filter press is higher than the upper limit value of the set oil pressure of the PLC controller or lower than the lower limit value of the set oil pressure (leakage exists), the PLC controller feeds the pressure of the oil pressure system back to the DCS control module, the DCS control module closes the liquid inlet cut-off valve of the salt mud filter press, and the operation of the second step is carried out;
when the pressure of the oil pressure system is between the upper limit value and the lower limit value of the set oil pressure, the oil pressure system maintains the pressure unchanged, and meanwhile, when the liquid inlet pressure is between the upper limit value and the lower limit value of the set liquid inlet pressure, the salt mud filter press normally operates.
And step two, closing a salt slurry liquid inlet cut-off valve of the salt slurry filter press by the DCS control system, automatically starting a washing pump, starting the washing pump for 5 to 10S (the time can be actually adjusted), opening a washing valve, and starting the washing operation of the salt slurry filter press. The washing operation of the salt mud filter press is carried out for 20 minutes (the time can be adjusted according to the actual condition), and after the washing operation is finished, the washing valve is closed.
And step three, feeding a water washing valve closing signal back to the DCS control module, sending a blowing operation instruction of the salt mud filter press by the DCS control module, opening a process air cut-off valve of the salt mud filter press, starting blowing operation of the salt mud filter press, controlling the process air flow at 1000-2000 m/h, and controlling the blowing time at 15 minutes (the time can be adjusted according to the practice).
And step four, after the blowing is finished, the salt mud filter press starts to feed liquid again, the steps are repeated to feed liquid, blow and wash, and the repeated operation is repeated for 3 to 4 times (the repeated times can be adjusted according to the actual conditions) to improve the filtering efficiency.
When the inlet pressure of the salt mud filter press rises abnormally, a command is sent to the salt mud inlet cut-off valve and the PLC through the DCS control module, the salt mud inlet cut-off valve is closed according to the command of the DCS control module, the pressure of an oil pressure system is automatically adjusted by the PLC, the salt mud filter press is cut out in time, the phenomenon of liquid leakage or equipment damage is prevented, the operating efficiency of the salt mud filter press can be improved, the salt content of the salt mud is reduced to 5-10%, and the water content of the salt mud is reduced to 40-45%.
Finally, it is noted that: the preferred embodiments of the present invention have been shown and described, and it will be understood that modifications and variations may be made by those skilled in the art without departing from the scope of the invention.
Claims (2)
1. An automatic control and monitoring system of a primary brine-salt mud filter press comprises a PLC (programmable logic controller), a DCS (distributed control system) control module, a filter press, a salt mud pool, a salt mud pump, a washing pump and an air inlet pipe, wherein the filter press is connected with an oil pressure system; it is characterized in that the preparation method is characterized in that,
the salt mud pool is communicated with the filter press through a salt mud pump and a pipeline, the filter press is also connected with a washing pump and an air inlet pipe through a pipeline, wherein a process air cut-off valve is arranged on the air inlet pipe, a washing cut-off valve is arranged on a connecting pipeline of the washing pump and the filter press, and a liquid inlet cut-off valve is arranged on a connecting pipeline of the salt mud pump and the filter press;
the process air cut-off valve, the washing cut-off valve, the liquid inlet cut-off valve and the washing pump are respectively in communication connection with the DCS control module, the DCS control module is in communication connection with the PLC, and the PLC is electrically connected with the oil pressure system.
2. The automatic control and monitoring system of a primary saltwater sludge filter press according to claim 1, wherein the inlet of the filter press is connected with a liquid inlet pipeline, and a remote pressure gauge is mounted on the liquid inlet pipeline and is in communication connection with the DCS control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222592008.4U CN218392397U (en) | 2022-09-29 | 2022-09-29 | Automatic control and monitoring system for primary saline-alkali mud filter press |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222592008.4U CN218392397U (en) | 2022-09-29 | 2022-09-29 | Automatic control and monitoring system for primary saline-alkali mud filter press |
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| CN218392397U true CN218392397U (en) | 2023-01-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116621194A (en) * | 2023-07-20 | 2023-08-22 | 山东鲁泰化学有限公司 | Method and device for recycling salt mud NaCl in chlor-alkali production |
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2022
- 2022-09-29 CN CN202222592008.4U patent/CN218392397U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116621194A (en) * | 2023-07-20 | 2023-08-22 | 山东鲁泰化学有限公司 | Method and device for recycling salt mud NaCl in chlor-alkali production |
| CN116621194B (en) * | 2023-07-20 | 2023-10-10 | 山东鲁泰化学有限公司 | Method and device for recycling salt mud NaCl in chlor-alkali production |
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