CN220223777U - Adjusting and controlling system applied to chemical device water system - Google Patents
Adjusting and controlling system applied to chemical device water system Download PDFInfo
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- CN220223777U CN220223777U CN202320447117.9U CN202320447117U CN220223777U CN 220223777 U CN220223777 U CN 220223777U CN 202320447117 U CN202320447117 U CN 202320447117U CN 220223777 U CN220223777 U CN 220223777U
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- water
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- injection skid
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000000126 substance Substances 0.000 title claims abstract description 26
- 238000010791 quenching Methods 0.000 claims abstract description 44
- 238000004458 analytical method Methods 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 26
- 239000003814 drug Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 16
- 239000003513 alkali Substances 0.000 claims description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001139 pH measurement Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 19
- 230000000171 quenching effect Effects 0.000 abstract description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 8
- 239000005977 Ethylene Substances 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 19
- 230000001276 controlling effect Effects 0.000 description 12
- 238000003860 storage Methods 0.000 description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 9
- 229910052708 sodium Inorganic materials 0.000 description 9
- 239000011734 sodium Substances 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 230000003113 alkalizing effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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]
Landscapes
- Control Of Non-Electrical Variables (AREA)
Abstract
The utility model relates to the technical field of PH control of quench water of an ethylene device, in particular to an adjusting and controlling system applied to a water system of a chemical device. The system comprises an analysis measuring unit, an injection skid-mounted unit and a control management unit which are respectively connected with the analysis measuring unit and the injection skid-mounted unit; the analysis and measurement unit is used for measuring the PH of quench water in the quench water device, the injection skid-mounted unit is used for injecting liquid medicine into the quench water, and the control and management unit is used for controlling the amount of the liquid medicine injected by the injection skid-mounted unit according to the PH of the quench water. The adjusting and controlling system can solve the problems of nonlinearity and untimely adjustment of the PH of the process water, thereby realizing real-time monitoring, adjustment and control of the PH of the quenching water of the water system of the chemical device.
Description
Technical Field
The utility model relates to the technical field of quench water PH control of a chemical device water system, in particular to an adjusting and controlling system applied to the chemical device water system.
Background
Too low PH value of quench water in the ethylene device can corrode pipelines and equipment, too high PH value can influence the quality of the quench water outlet water, and the quench water is emulsified when severe, so that real-time monitoring and control of PH value of the quench water in the ethylene device are of great significance to the production of the ethylene device.
The ethylene device is provided with a dosing device, and the current dosing device does not have the function of monitoring and controlling the PH of the quench water in real time, so that the current adjusting and controlling system applied to the water system of the chemical device is needed to solve the problems of nonlinear change and untimely adjustment of the PH of the quench water of the ethylene device.
Disclosure of Invention
The utility model aims to solve the problems of nonlinear change and untimely adjustment of quench water PH of an ethylene device, thereby realizing real-time monitoring, adjustment and control of quench water PH of a water system of the ethylene device.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the adjusting and controlling system applied to the chemical device water system comprises an analysis measuring unit, an injection skid-mounted unit and a control management unit which is respectively and electrically connected with the analysis measuring unit and the injection skid-mounted unit; the analysis measuring unit is used for measuring the PH of quench water in a water system of the chemical device, the injection skid-mounted unit is used for injecting liquid medicine into the quench water, and the control management unit is used for controlling the amount of the liquid medicine injected by the injection skid-mounted unit according to the PH measured by the analysis measuring unit.
Optionally, the analysis and measurement unit includes at least one set of analysis and measurement devices, each of which includes a PH display instrument and a PH measurement sensor connected to the PH display instrument, and the PH display instrument is further connected to the control and management unit.
Optionally, a filter and/or a cooling device is arranged on the chemical device water system, and the PH measuring sensor is connected with the chemical device water system through the filter and/or the cooling device.
Optionally, the injection skid-mounted unit comprises a dosing controller connected with the control management unit, a dosing tank and at least one dosing metering pump connected with the dosing controller and the dosing tank respectively.
Optionally, the injection skid-mounted unit further comprises an alkali solution storage tank, an ammonia solution storage tank and an automatic dispensing valve group connected with the alkali solution storage tank and the ammonia solution storage tank respectively.
Optionally, the control management unit includes a PLC controller.
The adjusting and controlling system applied to the chemical device water system monitors the PH of the quenching water in real time through the analysis and measurement unit, and the control management unit controls the injection skid-mounted unit to inject the liquid medicine into the quenching water in real time according to the PH change of the quenching water, so that the PH of the process quenching water is kept in a preset range, the problems of nonlinear change and untimely adjustment of the PH of the process water are solved, and the PH of the quenching water of the chemical device water system is monitored, adjusted and controlled in real time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first embodiment of a system for controlling and regulating a water system of a chemical plant;
fig. 2 is a schematic structural diagram of a regulation and control system applied to a water system of a chemical plant according to a first embodiment of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail below with reference to the accompanying drawings and examples of implementation. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The first embodiment of the utility model provides an adjusting and controlling system applied to a water system of a chemical device, referring to fig. 1, comprising an analysis measuring unit, an injection skid-mounted unit and a control management unit respectively connected with the analysis measuring unit and the injection skid-mounted unit; the analysis and measurement unit is used for measuring the PH of quench water in the quench water device, the injection skid-mounted unit is used for injecting liquid medicine into the quench water, and the control and management unit is used for controlling the amount of the liquid medicine injected by the injection skid-mounted unit according to the PH of the quench water.
The analysis and measurement unit is a sample water detection tool of the adjusting and control system, and is a source spring generated by system monitoring data when the PH of water quality changes nonlinearly. The injection skid-mounted unit is used as an executor of the system, solves the problem of adding medicine into equipment, and adjusts the amount of liquid medicine injected into the quench water according to the nonlinear change of the PH value of the sample water. The control management unit solves the problems of lag of PH dosing, comprehensive interference, judgment of correctness of PH, turbidity and sodium analysis measured values, changes an invisible dosing process into a numerical quantization process, and controls the amount of liquid medicine injected into the quench water by the injection skid-mounted unit according to the change of PH.
The utility model monitors the PH of the quench water of the chemical device water system in real time through the analysis and measurement unit, feeds back the measured PH value to the control and management unit in real time, and controls the injection skid-mounted unit to inject the liquid medicine into the quench water in real time according to the change of the PH of the quench water, so that the PH of the process quench water is kept in a preset range, and the problems of nonlinearity, hysteresis, coupling, interference, untimely adjustment and the like of the PH of the process water are solved, thereby realizing the real-time monitoring, adjustment and control of the PH of the quench water of the chemical device water system.
Further, the analysis and measurement unit comprises at least one set of analysis and measurement equipment, each analysis and measurement equipment comprises a PH display instrument and a PH measurement sensor connected with the PH display instrument, and the PH display instrument is also connected with the control and management unit.
For example, 4 sets of PH, turbidity and sodium analysis and measurement equipment are adopted, a PH measurement sensor with constant pressure measurement and analysis is adopted, a PH display instrument adopts a Chinese menu to independently display a head, and the display head has RS485 and current output, so that the operation is convenient.
The measuring points of the PH, turbidity and sodium analysis and measurement equipment can be respectively the inlet of a process water cooler of a chemical device, the condensate discharging valve of a pump body of a process water stripping tower kettle, the EV232 of a dilution steam condensate removing tank and the condensate discharging valve of an outlet of a sewage water cooler EH123, so that the monitoring value is more accurate, and the accuracy of controlling the dosage and adjusting the PH of sample water by the adjusting and controlling system is improved.
Further, a filter is arranged on the process quenching water device, and the PH measuring sensor is connected with the process quenching water device through the filter. The filter type such as GL43H DN20, in particular, when the quench water contains oil substances, the oil substances can adhere to the surface of the measuring sensor to influence the measuring effect, and the filter is added before the quench water enters the PH, turbidity and sodium analysis measuring equipment. In addition, when the analysis and measurement of the PH, turbidity and sodium of the pure water such as the quenching water are solved, the problem of oil in the water is solved, in the aspect of the analysis and measurement technology of PH, turbidity and sodium, a pressure-constant PH electrode is adopted, the internal pressure of the electrode is higher than the pressure of the quenching water by 0.05MPA, the PH electrode is difficult to achieve, and the oil stain adhesion on the surface of the electrode is eliminated through the pressure difference between the internal part of the electrode and the quenching water.
Furthermore, when the temperature of the process sample water exceeds 60 ℃, the PH, turbidity and sodium analysis measurement accuracy and instruments are greatly influenced, so that a cooling device is added, the cooling device comprises a cooler, a water supply valve and related stainless steel pipes, in addition, no pressure reducing equipment is arranged when the cooling water enters the sample water for measurement, and the pressure fluctuation of the sample water can influence the PH, turbidity and sodium analysis measurement accuracy and precision, so that the PH, turbidity and sodium analysis measurement sensor with a pressure balance system can be adopted.
Further, the injection skid-mounted unit comprises a dosing controller, a dosing box and at least one dosing metering pump, wherein the dosing controller and the dosing box are connected with the control management unit, and the at least one dosing metering pump is respectively connected with the dosing controller and the dosing box. The dosing metering pumps are for example 4, and the 4 metering pumps are used for respectively injecting the alkalizing agent into the quenching water unit, the process water stripping unit and the dilution steam generator unit, so that the flexible adjustment of the injection quantity of each point can be realized, one pump corresponds to one injection point, and the pump is provided with a standby pump.
Specifically, the control management unit controls the dosing controller to work according to the numerical value measured by the analysis and measurement unit, and the dosing controller controls the dosing metering pump to pump the dosing from the dosing box so as to add a proper amount of liquid medicine into the chemical device water system, so that the PH of the quench water is kept in a constant range.
Further, the injection skid-mounted unit further comprises an alkali solution storage tank, an ammonia solution storage tank and an automatic dispensing valve group which is respectively connected with the alkali solution storage tank and the ammonia solution storage tank.
The automatic dispensing valve group comprises a concentration meter and a water supply valve, the model of the water supply valve is DN20, the ammonia solution concentration meter is connected to the ammonia solution storage tank, the alkali solution concentration meter is connected to the alkali solution storage tank, the automatic matching of the solution concentration meter on the solution storage tank and the water supply valve is realized through proportion regulation, and finally, 30% of solution is regulated to 3% -6% through the inspection of the concentration meter, so that the effect of regulating the concentration of the liquid medicine solution injected into the skid-mounted unit is finally achieved, the problem that the fluctuation of the PH value of the whole production device is large due to the large difference of the concentration of ammonia solution and alkali solution due to the fact that the proportion of added ammonia, alkali and water can only be regulated according to the experience of operators is avoided.
Further, the control management unit includes a PLC controller. Specifically, the model of the PLC controller is Siemens S300, and the PLC controller of the control management unit is communicated with the analysis and measurement unit and the injection skid-mounted unit through RS 485.
Specifically, the control management unit needs to adopt a special robust self-adaptive algorithm, adopts a special algorithm such as integral separation, integral saturation resistance, dead zone area, incomplete differentiation and the like, has good stability and robustness, and can ensure the accuracy of dosing.
The traditional method for setting the parameters of the traditional PID controller is to determine the PID parameters according to a certain setting principle on the basis of obtaining an object mathematical model, however, in actual industrial process control, many controlled process mechanisms are complex, and the method has the characteristics of high nonlinearity, time-varying uncertainty, pure hysteresis and the like.
Under the influence of nonlinear changes of flow and PH values, process parameters and even model structures can change. This requires that in control not only the setting of parameters is independent of the mathematical model of the object, but also the PID parameters can be adjusted on line to meet the requirements of real-time control.
Adaptive PID control is an effective way to solve this problem. The self-adaptive PID control absorbs the advantages of the self-adaptive control and the conventional PID control and is the product of the combination of the self-adaptive control and the conventional PID control. Firstly, it has the advantages of automatically identifying the controlled process parameters, automatically setting the controller parameters, adapting to the change of the controlled process parameters, and the like, and secondly, it has the advantages of simple structure, good robustness and high reliability of the conventional PID controller. Therefore, two kinds of adaptive PID operations are overlapped on the control algorithm.
The PH value is continuously measured on line, and the numerical model is built based on the parameter identification of the controlled process through the 4 measured PH values and the change of the sample water temperature and the concentration change in the solution tank; all values are reserved, the change condition of the PH value in the measurement process is assessed through a time period, all data are stacked to form a change pointer and a change quantity, and the dosage is set, corrected and optimized through methods of change quantity identification, reasoning and the like; the change of the control error amount is achieved according to the automatic change of different formation variables in four seasons of 1 year. The error change value is smaller and smaller according to the longer the automatic dosing system runs, and is approximate to 0 without limitation, the system also participates in the dosing adjustment according to the temperature change of the sample water measured by the PH meter, and the dosing is different at different temperatures, and is set, corrected and optimized through methods of mode identification, reasoning and the like.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (5)
1. The adjusting and controlling system applied to the chemical device water system is characterized by comprising an analysis measuring unit, an injection skid-mounted unit and a control management unit which is respectively and electrically connected with the analysis measuring unit and the injection skid-mounted unit; the analysis and measurement unit is used for measuring the PH of quench water of a water system of the chemical device, the injection skid-mounted unit is used for injecting liquid medicine into the quench water, and the control and management unit is used for controlling the amount of the liquid medicine injected by the injection skid-mounted unit according to the PH value measured by the analysis and measurement unit;
the analysis and measurement unit comprises at least one set of analysis and measurement equipment, each analysis and measurement equipment comprises a PH display instrument and a PH measurement sensor connected with the PH display instrument, and the PH display instrument is also connected with the control and management unit.
2. The regulation and control system according to claim 1, wherein a filter and/or a cooling device is provided on the chemical plant water system, and the PH measuring sensor is connected to the chemical plant water system through the filter and/or the cooling device.
3. The regulation and control system of claim 2, wherein the injection skid comprises a dosing controller connected to the control management unit, a dosing tank, and at least one dosing metering pump connected to the dosing controller and the dosing tank, respectively.
4. The regulation and control system of claim 3, wherein the injection skid further comprises an alkali solution reservoir, an ammonia solution reservoir, and an apas valve block connected to the alkali solution reservoir and the ammonia solution reservoir, respectively.
5. The regulation and control system of claim 4, wherein the control management unit comprises a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320447117.9U CN220223777U (en) | 2023-03-10 | 2023-03-10 | Adjusting and controlling system applied to chemical device water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320447117.9U CN220223777U (en) | 2023-03-10 | 2023-03-10 | Adjusting and controlling system applied to chemical device water system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220223777U true CN220223777U (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320447117.9U Active CN220223777U (en) | 2023-03-10 | 2023-03-10 | Adjusting and controlling system applied to chemical device water system |
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| Country | Link |
|---|---|
| CN (1) | CN220223777U (en) |
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- 2023-03-10 CN CN202320447117.9U patent/CN220223777U/en active Active
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