Efficient combined-alkali carbon filtration production system

Abstract

The invention provides an efficient combined-soda carbon filtration production system, and relates to the technical field of combined-soda production, the system comprises the following components: a crystallization automatic vehicle changing subsystem and a carbonization automatic vehicle changing subsystem; according to the invention, through integration of the crystallization automatic vehicle-changing subsystem and the carbonization automatic vehicle-changing subsystem, whole-course automatic monitoring and management of a combined soda production process are realized, in the crystallization subsystem, a high-precision monitoring device is combined with an intelligent algorithm, stock information of a specific substance can be accurately obtained in real time, and the production efficiency of the combined soda production process is improved. Therefore, key operations such as hot AI cleaning and emptying, ammonia system switching and the like are accurately controlled, the problem of low production efficiency caused by manual judgment errors or operation delay in a traditional system is avoided, meanwhile, the application of a full-function control valve in the carbonization subsystem realizes intelligent switching of carbonization tower operation modes, and the operation efficiency of the carbonization tower is improved. And the automation level of the production process is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of combined alkali production, and in particular relates to a highly efficient combined alkali carbon filtration production system. Background Art

[0002] As an important chemical production process, the production of soda ash occupies an important position in the national economy. This process mainly extracts and purifies alkali products from raw materials through a series of complex chemical reactions and physical processes. With the advancement of science and technology and the development of automation technology, the automation and intelligence level of the soda ash production process has gradually improved, becoming the key to improving production efficiency, reducing costs and ensuring product quality. The efficient soda ash carbon filtration production system came into being, aiming to achieve comprehensive monitoring and optimization of the soda ash production process by integrating advanced automation control technology and intelligent management system, thereby improving the overall production efficiency.

[0003] However, the traditional soda ash production system still has many shortcomings. In the crystallization stage, the traditional production system usually lacks accurate monitoring and judgment mechanisms, and cannot accurately obtain the inventory information of specific substances in real time, resulting in inaccurate vehicle change timing, affecting production efficiency and product quality. At the same time, key operations such as hot AI cleaning and venting, ammonia system switching, external cooler switching and external cooler cleaning also lack refined time control and logical judgment, resulting in low operating efficiency, high energy consumption, and safety hazards. In the carbonization stage, the traditional production system also has problems such as low degree of automation and complex operation. The switching of the operating mode of the carbonization tower usually relies on manual judgment and operation, which is not only time-consuming and labor-intensive, but also prone to production interruption or product quality degradation due to operational errors. In addition, the key valves in the carbonization system lack intelligent control and cannot achieve accurate opening and closing and status monitoring.

[0004] In view of the above problems, it is necessary to optimize the existing alkali-carbon filtration production system. By introducing advanced automation technology and intelligent control mechanism, comprehensive monitoring and optimization of the alkali-carbon filtration production process can be achieved. Therefore, it is of great significance to develop an efficient alkali-carbon filtration production system that can comprehensively realize the above characteristics. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and to provide an efficient combined alkali carbon filtration production system, which can realize comprehensive automated control of the combined alkali production process by integrating an automatic crystallization car-changing subsystem and an automatic carbonization car-changing subsystem. In the automatic crystallization car-changing subsystem, high-precision monitoring devices and specific algorithms are used to judge the inventory information of specific substances in real time, and accurately control the time and logical sequence of key operations such as hot AI cleaning and venting, and ammonia system switching. In the automatic carbonization car-changing subsystem, all key valves are replaced with full-function control valves, realizing intelligent switching of carbonization tower operation modes and precise control of valves. In addition, real-time feedback and sharing of status signals are realized between the two subsystems, so that the entire production system can automatically adjust operating parameters or trigger specific processes according to the current status, thereby realizing maximization of production efficiency, minimization of energy consumption and steady improvement of product quality.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An efficient combined alkali carbon filtration production system, the system comprises the following components: a crystallization automatic car changing subsystem and a carbonization automatic car changing subsystem;

[0008] The crystallization automatic car-changing subsystem includes a key material inventory monitoring and triggering module, a hot AI cleaning and venting module, an ammonia system switching module, an external cooler switching module, and an external cooler cleaning module;

[0009] The key material inventory monitoring and triggering module is equipped with a high-precision monitoring device to accurately obtain the inventory information of specific materials in real time, compare the inventory information with the preset threshold through specific algorithms and logical judgments, and generate a trigger signal to start the subsequent operation process when the inventory reaches a specific condition;

[0010] The hot AI cleaning and venting module sets a precise timer in the control system to control the valve opening and closing time. When the hot AI cleaning and venting operation is started, the timer starts timing after the specific venting main valve is opened according to the preset logical sequence, and the specific external cooler cleaning hot AI inlet valve is closed after the first set time interval, and the specific external cooler venting valve is fully opened after the second set time interval, and the specific external cooler cleaning overflow valve is closed after the third set time interval to improve the cleaning effect;

[0011] The ammonia system switching module combines the specific material release time and the related pump current change as dual trigger conditions, and sets a special monitoring device to monitor the specific material release time and the related pump current value in real time. When the specific material release time reaches a specific condition and the related pump current drops from the initial setting value to another specific value, the control system starts the ammonia system switching program, closes the specific external cooler liquid supply valve, and adjusts the related gas ammonia outlet pressure according to the preset pressure setting value. At the same time, the liquid level of another specific external cooler circulation tank is set according to the specific liquid level setting value to make it slowly fill with liquid, thereby reducing the risk of misoperation;

[0012] The external cooler switching module comprehensively considers specific evaporation time and temperature change as trigger conditions, and is equipped with a high-precision temperature sensor and a time monitoring device to monitor the evaporation time and temperature change of the external cooler in real time. When the evaporation time reaches a specific condition and the temperature change reaches a specific standard, the external cooler switching program is triggered, and the specific system hot AI vent main valve is closed and another specific system related vent valve is opened according to a preset logical sequence. After a first set time interval, the specific external cooler main pump is stopped and the upper and lower exhaust valves of the external cooler are opened, and another specific external cooler main pump is started and its lower exhaust valve is closed. After a second set time interval, its upper exhaust valve is closed and the vent valve of the previously stopped external cooler is opened, so as to ensure a smooth transition of the external cooler switching process to reduce the impact on production;

[0013] The external cooler cleaning module uses the opening time of a specific external cooler vent valve as a key condition for triggering cleaning, and sets a time monitoring device to monitor the opening time of the vent valve. When a specific condition is reached, the cleaning operation is triggered, the relevant vent valve is closed, and the specific external cooler overflow valve is opened after a first set time interval, and the external cooler cleaning hot AI inlet valve is opened to improve the cleaning effect and service life of the external cooler;

[0014] The carbonization new system communication valve, grouping valve, cooling water valve, alkali outlet valve, alkali washing pipe valve, AⅡ valve, lower section air valve, middle section air valve and cleaning air valve in the carbonization automatic car changing subsystem are all replaced with full-function control valves. When the carbonization tower A / B switches the operating mode, the control system controls the state changes of each valve in sequence according to the preset program steps.

[0015] Furthermore, the key material inventory monitoring and triggering module compares the inventory information with the preset threshold value through logical judgment. Specifically, the inventory of a specific material is Q, and the preset threshold value is Q 0 , the judgment condition formula is: Q = Q 0 -ΔQ, where ΔQ is the allowable stock fluctuation value, and ΔQ>0, Q represents the real-time stock of a specific substance in the system, and its data is obtained through high-precision monitoring sensors, Q 0It is the preset reference value of the inventory of a specific substance. ΔQ is the allowable inventory fluctuation value set to consider the stability of the system and the slight fluctuations in actual operation. When Q satisfies Q = Q 0 -ΔQ triggers subsequent actions.

[0016] Furthermore, the hot AI cleaning and venting module sets a precise timer in the control system to control the valve opening and closing time, and the opening time of the venting main valve is set as t 1 , close the specific external cooler to clean the hot AI inlet valve for a time interval of Δt 1 , the time interval for fully opening the specific external cooler vent valve is Δt 2 , the time interval for closing the overflow valve of the specific external cooler cleaning is Δt 3 , the time formula corresponding to the valve operation sequence is: t close1 =t 1 +k 1 Δt 1 , t open2 =t 1 +k 1 Δt 1 +k 2 Δt 2 , t close2 =t 1 +k 1 Δt 1 +k 2 Δt 2 +k 3 Δt 3 , where k 1 , k 2 , k 3 is the correction factor, and 0 <k 1 ,k 2 ,k 3 ≤1,t close1 is the time to close the hot AI inlet valve for cleaning of a specific external cooler, t open2 is the time to fully open the specific external cooler vent valve, t close2 It is the time to close the specific external cooler purge overflow valve.

[0017] Furthermore, the ammonia system switching module combines the specific substance release time and the related pump current change as dual trigger conditions, setting the specific substance release time as T and the preset release time threshold as T 0 , the initial value of the relevant pump current is I 1 , the current value after the drop is I 2 , the rated current of the pump is I rated , the trigger condition formula is: where k 1 is the comprehensive trigger threshold, and 0 <k 1 ≤1.

[0018] Furthermore, the ammonia system switching module combines the specific material release time and the related pump current change as dual trigger conditions, and sets a special monitoring device to monitor the specific material release time and the related pump current value in real time. When the specific material release time reaches a specific condition and the related pump current drops from the initial setting value to another specific value, the control system starts the ammonia system switching program. During the switching process, the circulation tank liquid level and pressure of another specific external cooler are set. For the circulation tank liquid level, the target liquid level is set to L target , the current liquid level is L current , the liquid level adjustment speed is v L , the adjustment time is t, then the formula for the change of liquid level with time is: L(t) = L current +v L t, when L(t)=L target When the liquid level adjustment is completed, for the pressure adjustment, the target value of the gas ammonia outlet pressure adjustment is set to P target , the current pressure is P current , the pressure adjustment factor is k P , adjust the time to t, then the formula for pressure change over time is: P(t) = P current +k P t, when P(t)=P target The pressure adjustment is completed.

[0019] Furthermore, the external cooler switching module comprehensively considers the specific evaporation time and temperature change as the trigger condition, and is equipped with a high-precision temperature sensor and a time monitoring device to monitor the evaporation time and temperature change of the external cooler in real time. Assuming the evaporation time of the external cooler is t evap , the preset evaporation time threshold is t evap0 , the temperature change is ΔT, and the preset temperature change threshold is ΔT 0 , the rated temperature of the external cooler is T rated , the trigger condition formula is: where k 2 is the comprehensive trigger threshold, and 0 <k 2 ≤1.

[0020] Furthermore, the external cooler cleaning module uses the specific external cooler vent valve opening time as the key condition for triggering cleaning. Assume that the specific external cooler vent valve opening time is t open3 , the preset vent valve opening time threshold is t open30 , the trigger condition formula is: t open3 ≥t open:30 +k 6 Δt open , Δt open is the vent valve opening time measurement error, k 6is the error correction coefficient, and 0 <k 6 ≤1.

[0021] Furthermore, the external cooler cleaning module uses the opening time of a specific external cooler vent valve as a key condition for triggering cleaning, and sets a time monitoring device to monitor the opening time of the vent valve. When a specific condition is reached, the cleaning operation is triggered. Specifically, the relevant vent valve is closed. The time for closing the relevant vent valve is t close-FQ , after the first set time interval Δt 1-open Then open the overflow valve of the specific external cooler, where t open-YL =t close-FQ +Δt 1-open , where t open-YL The time for opening the overflow valve, after the second set time interval Δt 2-open Then open the external cooler to clean the hot AI inlet valve, and the time relationship satisfies t open-AI =t open-YL +Δt 2-open , where t open-AI This is the time to open the external cooler to clean the hot AI inlet valve.

[0022] Furthermore, after completing a specific operation, the crystallization automatic car-changing subsystem sends a status signal to the carbonization automatic car-changing subsystem to inform it of the operating status of the crystallization part, and the carbonization automatic car-changing subsystem adjusts its own operation accordingly. At the same time, the key state changes of the carbonization automatic car-changing subsystem are fed back to the crystallization automatic car-changing subsystem, so that it can adjust its own operating parameters or trigger a specific process according to the state of the carbonization automatic car-changing subsystem. Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention realizes the full-process automated monitoring and management of the soda ash production process by integrating the crystallization automatic car-changing subsystem and the carbonization automatic car-changing subsystem. In the crystallization subsystem, the combination of high-precision monitoring devices and intelligent algorithms can accurately obtain the inventory information of specific substances in real time, thereby accurately controlling key operations such as hot AI cleaning and venting, and ammonia system switching, thereby avoiding the problem of low production efficiency caused by manual misjudgment or operation delays in traditional systems. At the same time, the application of full-function control valves in the carbonization subsystem realizes the intelligent switching of the carbonization tower operation mode, further improving the automation level of the production process.

[0024] (2) The present invention ensures that hot AI cleaning and venting, ammonia system switching and other operations are performed at the best time through precise time control and logical judgment, thereby avoiding unnecessary energy waste. In addition, the precise control of the full-function control valve makes the operating mode switching of the carbonization tower smoother, reducing the impact of operational fluctuations on product quality. At the same time, the real-time status feedback and sharing between the two subsystems enable the entire production system to automatically adjust the operating parameters according to the current status, thereby further ensuring the stability and consistency of product quality.

[0025] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a structural schematic diagram of a highly efficient combined alkali carbon filtration production system;

[0028] Figure 2 This is a process operation diagram of a highly efficient combined alkali carbon filtration production system. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1 :

[0031] See also Figure 1 and Figure 2 As shown, this embodiment describes in detail the specific application of an efficient combined alkali carbon filtration production system in a large chemical enterprise, aiming to realize the intelligent switching of the carbonization tower operation mode by introducing the present invention, and further improve the automation level of the production process.

[0032] For the operation of the crystallization automatic car change system, the factory installed a high-precision specific material inventory monitoring sensor (connected to the company's existing DCS production control system to ensure the efficiency of data transmission and processing). The sensor can obtain the inventory data Q of specific materials (such as thermal AI) in real time and accurately. The control system uses the formula Q = Q 0 -ΔQ determines whether the trigger condition is met, where the preset threshold Q 0 It is set to 50 cubic meters (based on the factory's long-term production experience and taking into account the impact of factors such as the highly corrosive nature of the alkali mother liquor on production), and the allowable inventory fluctuation value ΔQ is set to 2 cubic meters. When the inventory Q of a specific substance reaches 48 cubic meters, the comparison module will quickly generate a trigger signal and transmit it to the subsequent modules through an efficient signal transmission line, thereby starting the subsequent operation process.

[0033] For the hot AI cleaning and venting module, a precise timer is set in the control system (relying on the company's DCS system and the technical support of the electrical instrument branch). The timer uses a high-precision clock chip and advanced timing algorithm to ensure the accuracy of time control. When the AI ​​cleaning and venting operation is started, the control system will follow the preset logic at time t 1 Set to 0 seconds to open the specific venting main valve, and press the timer to close1 =t 1 +k 1 Δt 1 , t open2 =t 1 +k 1 Δt 1 +k 2 Δt 2 , t close2 =t 1 +k 1 Δt 1 +k 2 Δt 2 +k 3 Δt 3 Control valve operation, where Δt 1 Set to 3 seconds (considering the flow characteristics and cleaning requirements of hot AI), Δt 2 Set to 2 seconds (helps to quickly drain the hot AI), Δt 3 Set to 1 second (to avoid resource waste and system failure), k 1 =k 2 =k 3 =1, open the main drain valve at 0 seconds, close the new 2# external cooler cleaning hot AI inlet valve after 3 seconds, fully open the drain valve at 5 seconds, and close the overflow valve at 6 seconds.

[0034] The ammonia system switching module is equipped with a time monitor to monitor the specific substance release time and a current sensor to monitor the current of the relevant pump. The time monitor has high resolution and high precision, and can accurately record the time T of the specific substance release. The current sensor can monitor the current changes of the relevant pump in real time to ensure the safe operation of the system. When the specific substance release time T reaches 35 minutes (T 0 Set to 30 minutes), the relevant pump current changes from I 1 =18A down to I 2 =12A(I rated Assumed to be 25A), k 1 =0.8, through the trigger formula Determine that the trigger condition is met and use the formula L(t) = L current +v L tAdjust the liquid level of another specific external cooler circulation tank, where the target liquid level L target Set to 20%, the current liquid level L current Set to 5%, liquid level adjustment speed v L Set to 196 / min. According to calculation, it takes 15 minutes for the liquid level to adjust from 5% to 20%. That is, when L(t) = L target When the liquid level adjustment is completed, at the same time, through the formula P(t) = P current +k P tAdjust the outlet pressure of ammonia gas, where the target pressure P target Set to 0.4Mpa, current pressure P current Set to 0.2Mpa, pressure adjustment coefficient k P Set to 0.02Mpa / minute, according to calculation, it takes 10 minutes for the pressure to adjust from 0.2Mpa to 0.4Mpa, that is, when P(t)=P target The pressure adjustment is completed at the same time, providing guarantee for the stable operation of the ammonia system.

[0035] The external cooler switching module is equipped with a high-precision temperature sensor and a time monitoring device. The temperature sensor uses advanced temperature detection technology to accurately measure the temperature change of the external cooler. The time monitoring device can accurately record the evaporation time of the external cooler. evap Up to 18 minutes (t evap0 set to 15 minutes), the temperature change ΔT is 10°C (ΔT 0 Set to 8°C), the rated temperature of the external cooler is T rated Set to 200℃, k 2 =0.9, through the trigger formula It is determined that the trigger condition is met. After the condition is met, the control system starts the external cooler switching program. First, the hot AI venting main valve of the specific system is closed, and the related venting valve of another specific system is opened. After the first set time interval (set to 2 seconds), the main pump of the specific external cooler is stopped, and the upper and lower exhaust valves of the external cooler are opened. Then the main pump of another specific external cooler is started, and its lower exhaust valve is closed. After the second set time interval (set to 3 seconds), its upper exhaust valve is closed, and the venting valve of the external cooler that was stopped before is opened. During the switching process, the formula Monitor the temperature change rate, where ΔT is the temperature change within the time period Δt. The control system will adjust the time and sequence of the switching operation based on the real-time monitored temperature change rate to better understand the temperature change of the external cooler and ensure the smooth switching process.

[0036] The external cooler cleaning module is equipped with a special time monitoring device to monitor the opening time t of the specific external cooler vent valve open3 The time monitoring device has high precision and high reliability and can accurately record the opening time of the vent valve. When the formula t is satisfied open3 ≥t open.30 +k 6 Δt open The cleaning operation is triggered when the vent valve opening time threshold t is preset. open30 Set to 30 minutes, the vent valve opening time measurement error Δt open Assuming 1 minute, the error correction coefficient k 6 =1, when t open3 When the time reaches 32 minutes, cleaning is triggered. Specifically, the relevant vent valve is closed. The time to close the relevant vent valve is t close-FQ , after the first set time interval Δt 1-open Then open the overflow valve of the specific external cooler, where t open-YL =t close-FQ +Δt 1-open , where t open-YL The time for opening the overflow valve, after the second set time interval Δt 2-open Then open the external cooler to clean the hot AI inlet valve, and the time relationship satisfies t open-AI =t open-YL +Δt 2-open , where t open-AI To open the external cooler to clean the hot AI inlet valve, during the cleaning process, the control system will adjust the time and intensity of the cleaning operation according to the real-time monitoring data to ensure the best cleaning effect and extend the service life of the external cooler.

[0037] For the operation of the carbonization automatic car-changing subsystem, when the carbonization tower A needs to be changed from the alkali-making state to the cleaning state, the control system controls the state changes of each valve in sequence according to the preset program steps. The carbonization new system contact valve, grouping valve, cooling water valve, alkali outlet valve, alkali washing pipe valve, A-process valve, lower section air valve, middle section air valve, cleaning air valve, etc. are all replaced with full-function control valves (relying on the technical capabilities of the company's electrical instrumentation branch to carry out valve replacement and control system integration). These full-function control valves have the characteristics of high precision, high reliability and fast response, and can It can meet the strict requirements of the carbonization automatic car-changing system. First, the control system changes the state of the connecting valve, and the connecting valve opens at 0 seconds. Then, the state of the grouping valve, cooling water valve and other valves are changed in turn. The grouping valve closes at 5 seconds, the cooling water valve closes at 8 seconds, the A blood valve opens at 10 seconds, the lower air valve closes at 12 seconds, the middle air valve closes at 15 seconds, and the cleaning air valve opens at 20 seconds. After the pressure is completed for 15 minutes, the grouping valve opens at 16 minutes, the alkali outlet valve closes at 18 minutes, and the alkali wash pipe valve opens at 20 minutes to enter the normal cleaning state.

[0038] In summary, by introducing the present invention, in the entire production process, the crystallization automatic car changing system and the carbonization automatic car changing system work together. Through information interaction, operation coordination and control system integration, the plant's caustic soda production efficiency is increased by 30%, and the product quality qualification rate is increased from 85% to 95%, while reducing labor costs and equipment maintenance costs.

[0039] Embodiment 2 :

[0040] On the basis of Example 1, this example describes in detail the specific application of an efficient combined alkali carbon filtration production system in a small chemical plant, and the automation level and efficiency of combined alkali production are improved by introducing the present invention.

[0041] For the operation of the crystallization automatic car change system, the company installed a high-precision specific material inventory monitoring sensor connected to its own control system. The sensor uses advanced sensing technology to accurately and stably obtain the inventory data Q of specific substances (such as thermal AI) in a complex chemical production environment and set a preset threshold Q 0 The allowable stock fluctuation value ΔQ is 1 cubic meter. When the inventory Q of a specific substance is monitored to reach 19 cubic meters, the comparison module in the control system will quickly start subsequent operations.

[0042] For hot AI cleaning and venting modules, the precise timer in the control system starts the hot AI cleaning and venting operation at t 1 =0 seconds to open the specific venting main valve. The timer has a high-precision timing function. Its internal clock chip and timing algorithm can be accurate to the millisecond level to ensure the accuracy of time control. Set Δt1 =2 seconds, Δt 2 =3 seconds, Δt 3 = 1.5 seconds, k 1 =0.9,k 2 =1,k 3 =0.8, according to the formula, the main venting valve is opened at 0 seconds, and the hot AI inlet valve is closed after 2 seconds. At this time, the flow of hot AI is cut off and begins to gather in a specific area for subsequent venting operations. The venting valve is fully opened at 5 seconds, and the hot AI can be discharged quickly. The overflow valve is closed at 6.5 seconds to avoid resource waste and system failure. During the whole process, the timer strictly controls the opening and closing time of the valve according to the set formula and parameters to ensure that the hot AI cleaning and venting process is carried out efficiently and stably.

[0043] The ammonia system switching module includes a time monitor for monitoring the release time of a specific substance and a current sensor for monitoring the current of the relevant pump. The time monitor has high resolution and high precision, and can accurately record each time node of the release of a specific substance to ensure the accuracy of the data. The current sensor can monitor the current changes of the relevant pump in real time, and its accuracy can reach the milliampere level, providing reliable guarantee for the safe operation of the system. When the release time T of the heat A reaches 22 minutes (T 0 Set to 20 minutes), the relevant pump current changes from I 1 =12A down to I 2 =8A(I rated Assumed to be 15A), k 1 =0.7 triggers switching, for liquid level adjustment, the target liquid level L target Set to 1296, current liquid level L current Set to 2%, liquid level adjustment speed v L The control system will continuously optimize the adjustment speed according to the real-time feedback of the liquid level data during the liquid level adjustment process to ensure the accuracy and stability of the liquid level adjustment. For example, when the liquid level is close to the target liquid level, the control system will appropriately reduce the adjustment speed to avoid liquid level overshoot. The liquid level adjustment is completed after 25 minutes. For pressure adjustment, the target pressure P target Set to 0.3Mpa, current pressure P current Set to 0.15Mpa, pressure adjustment coefficient k P Set to 0.01Mpa / minute, the control system will adjust the pressure adjustment coefficient in real time according to the data fed back by the pressure sensor to ensure the smoothness of the pressure adjustment. For example, when the pressure rises too quickly, the pressure adjustment coefficient will be appropriately lowered. The pressure adjustment will be completed after 15 minutes, providing guarantee for the stable operation of the ammonia system.

[0044] The external cooler switching module works through a high-precision temperature sensor and a time monitoring device. The temperature sensor uses a high-precision thermistor element and can accurately measure the temperature change of the external cooler with a measurement accuracy of ±0.1°C. The time monitoring device can accurately record the evaporation time of the external cooler with an accuracy of seconds. evap 12 minutes (t evap0 set to 10 minutes), the temperature change ΔT is 6°C (ΔT0 is set to 5°C), and the rated temperature T rated Set to 150℃, k 2 =0.8 triggers the switching. During the switching process, the process is operated according to the process and the relevant parameters are monitored and calculated through the formula. For example, Δt is set to 2 seconds to calculate the temperature change rate, the exhaust valve flow coefficient C v is set to 0.4, the pressure difference ΔP before and after the exhaust valve is set to 0.15Mpa, and the gas density ρ is set to 1.1kg / m 3 , exhaust valve opening time t exhaust Set to 4 seconds, according to the formula Calculate the exhaust volume as The control system will reasonably adjust the opening and time of the exhaust valve according to the calculated exhaust volume to ensure the smooth exhaust process and avoid affecting the effect of external cooler switching due to poor exhaust. At the same time, through the formula Monitor the temperature change rate. The control system will adjust the speed and sequence of the switching operation according to the real-time monitored temperature change rate to ensure a smooth switching process.

[0045] The external cooler cleaning module is equipped with a special time monitoring device to monitor the specific external cooler vent valve opening time t open3 The time monitoring device has high precision and high reliability, and can accurately record the opening time of the vent valve with an accuracy of ±0.05 minutes. open3 Up to 23 minutes (t open30 Set to 20 minutes, Δt open Set to 1 minute, k 6 =0.9), and after being triggered, the cleaning is triggered according to the set process. For example, the first time interval is set to 1 second to open the overflow valve. At this time, the overflow valve is opened, and the liquid inside the specific external cooler begins to flow, preparing for the subsequent cleaning operation. The second time interval is set to 2 seconds to open the hot A inlet valve, and the hot AI enters the external cooler to start the cleaning process. During the cleaning process, the control system will adjust the time and intensity of the cleaning operation according to the real-time monitoring data to ensure the best cleaning effect and extend the service life of the external cooler.

[0046] For the operation of the carbonization automatic car change system, when the carbonization tower B changes from the cleaning state to the alkali making state, the control system controls the state change of each valve. The control system and each valve are connected through an efficient communication line to ensure the timeliness and accuracy of signal transmission. The grouping valve is closed at 0 seconds. At this time, the grouping situation of the carbonization tower in this group changes to prepare for the subsequent alkali making operation. The alkali outlet valve is opened at 3 seconds so that the alkali generated in the carbonization tower can flow out smoothly. The alkali washing pipe valve is closed at 5 seconds to prevent the alkali solution from flowing back. The AL valve is closed at 8 seconds to adjust the gas flow in the carbonization tower. The lower section gas valve is opened at 10 seconds to introduce the lower section gas. The cleaning gas valve is closed at 12 seconds to stop the entry of the cleaning gas. After 15 minutes of pressure matching, the connecting valve is closed at 16 seconds, the grouping valve is opened at 18 seconds, and the middle section gas valve is opened at 20 seconds to enter the normal alkali making state. After 30 minutes, the cooling water valve state is adjusted according to the temperature change. During the whole process, the control system will dynamically adjust the switching sequence and time interval of the valves according to the real-time feedback of the process parameters and equipment status to ensure a smooth transition of the whole process.

[0047] In summary, by applying the present invention, the degree of automation of the combined alkali production of the small chemical enterprise is significantly improved, the production efficiency is increased by 20%, the product quality is also improved, and at the same time, manual operation errors are reduced, the equipment maintenance cost is reduced, and the competitiveness of the enterprise in the market is enhanced.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An efficient alkali-carbon filtration production system, characterized in that: The system includes the following components: a crystallization automatic car-changing subsystem and a carbonization automatic car-changing subsystem; The crystallization automatic car-changing subsystem includes a key material inventory monitoring and triggering module, a hot AI cleaning and venting module, an ammonia system switching module, an external cooler switching module, and an external cooler cleaning module; The key material inventory monitoring and triggering module is equipped with a high-precision monitoring device to accurately obtain the inventory information of specific materials in real time, compare the inventory information with the preset threshold through specific algorithms and logical judgments, and generate a trigger signal to start the subsequent operation process when the inventory reaches a specific condition; The hot AI cleaning and venting module sets a precise timer in the control system to control the valve opening and closing time. When the hot AI cleaning and venting operation is started, the timer starts timing after the specific venting main valve is opened according to the preset logical sequence, the specific external cooler cleaning hot AI inlet valve is closed after the first set time interval, and the specific external cooler venting valve is fully opened after the second set time interval, and the specific external cooler cleaning overflow valve is closed after the third set time interval to improve the cleaning effect; The ammonia system switching module combines the specific material release time and the related pump current change as dual trigger conditions, and sets a special monitoring device to monitor the specific material release time and the related pump current value in real time. When the specific material release time reaches a specific condition and the related pump current drops from the initial setting value to another specific value, the control system starts the ammonia system switching program, closes the specific external cooler liquid supply valve, and adjusts the related gas ammonia outlet pressure according to the preset pressure setting value. At the same time, the liquid level of another specific external cooler circulation tank is set according to the specific liquid level setting value to make it slowly fill with liquid, thereby reducing the risk of misoperation; The external cooler switching module comprehensively considers specific evaporation time and temperature change as trigger conditions, and is equipped with a high-precision temperature sensor and a time monitoring device to monitor the evaporation time and temperature change of the external cooler in real time. When the evaporation time reaches a specific condition and the temperature change reaches a specific standard, the external cooler switching program is triggered, and the specific system hot AI vent main valve is closed and another specific system related vent valve is opened according to a preset logical sequence. After a first set time interval, the specific external cooler main pump is stopped and the upper and lower exhaust valves of the external cooler are opened, and another specific external cooler main pump is started and its lower exhaust valve is closed. After a second set time interval, its upper exhaust valve is closed and the vent valve of the previously stopped external cooler is opened, so as to ensure a smooth transition of the external cooler switching process to reduce the impact on production; The external cooler cleaning module uses the opening time of a specific external cooler vent valve as a key condition for triggering cleaning, and sets a time monitoring device to monitor the opening time of the vent valve. When a specific condition is reached, the cleaning operation is triggered, the relevant vent valve is closed, and the specific external cooler overflow valve is opened after a first set time interval, and the external cooler cleaning hot AI inlet valve is opened to improve the cleaning effect and service life of the external cooler; The carbonization new system communication valve, grouping valve, cooling water valve, alkali outlet valve, alkali washing pipe valve, AⅡ valve, lower section air valve, middle section air valve and cleaning air valve in the carbonization automatic car changing subsystem are all replaced with full-function control valves. When the carbonization tower A / B switches the operating mode, the control system controls the state changes of each valve in sequence according to the preset program steps.

2. The efficient alkali-carbon filtration production system according to claim 1 is characterized in that: The key material inventory monitoring and triggering module compares the inventory information with the preset threshold through logical judgment. Specifically, the inventory of the specific material is set to Q, the preset threshold is Q0, and the judgment condition formula is: Q=Q0-ΔQ, wherein ΔQ is the allowable inventory fluctuation value, and ΔQ>0, Q represents the real-time inventory of the specific material in the system, and its data is obtained through a high-precision monitoring sensor. Q0 is a preset reference value of the specific material inventory, and ΔQ is an allowable inventory fluctuation value set to consider the stability of the system and small fluctuations in actual operation. When Q satisfies Q=Q0-ΔQ, subsequent operations are triggered.

3. The efficient alkali-carbon filtration production system according to claim 1 is characterized in that: The hot AI cleaning and venting module sets a precise timer in the control system to control the valve opening and closing time. The opening time of the main venting valve is set to t1, the time interval for closing the hot AI inlet valve for cleaning the specific external cooler is Δt1, the time interval for fully opening the specific external cooler venting valve is Δt2, and the time interval for closing the specific external cooler cleaning overflow valve is Δt3. The time formula corresponding to the valve operation sequence is: t close1 =t1+k1Δt1,t open2 =t1+k1Δt1+k2Δt2, t close2 =t1+k1Δt1+k2Δt2+k3Δt3, where k1, k2, k3 are correction coefficients, and 0 <k1,k2,k3≤1,t close1 is the time to close the hot AI inlet valve for cleaning of a specific external cooler, t open2 is the time to fully open the specific external cooler vent valve, t close2 It is the time to close the specific external cooler purge overflow valve.

4. The efficient alkali-carbon filtration production system according to claim 1 is characterized in that: The ammonia system switching module combines the specific substance release time and the related pump current change as dual trigger conditions. The specific substance release time is set to T, the preset release time threshold is T0, the initial value of the related pump current is I1, the current value after the drop is I2, and the rated current of the pump is I rated , the trigger condition formula is: Where k1 is the comprehensive trigger threshold, and 0 <k1≤1。 5. The efficient combined alkali carbon filtration production system according to claim 1 is characterized in that: The ammonia system switching module combines the specific material release time and the related pump current change as dual trigger conditions, and sets a special monitoring device to monitor the specific material release time and the related pump current value in real time. When the specific material release time reaches a specific condition and the related pump current drops from the initial setting value to another specific value, the control system starts the ammonia system switching program. During the switching process, the circulation tank liquid level and pressure of another specific external cooler are set. For the circulation tank liquid level, the target liquid level is set to L target , the current liquid level is L current , the liquid level adjustment speed is v L , the adjustment time is t, then the formula for the change of liquid level with time is: L(t) = L current +v L t, when L(t)=L target When the liquid level adjustment is completed, for the pressure adjustment, the target value of the gas ammonia outlet pressure adjustment is set to P target , the current pressure is P current , the pressure adjustment factor is k P , adjust the time to t, then the formula for pressure change over time is: P(t) = P current +k P t, when P(t)=P target The pressure adjustment is completed.

6. The efficient alkali-carbon filtration production system according to claim 1, characterized in that: The external cooler switching module comprehensively considers the specific evaporation time and temperature change as the trigger condition, and is equipped with a high-precision temperature sensor and a time monitoring device to monitor the evaporation time and temperature change of the external cooler in real time. Assume that the evaporation time of the external cooler is t evap , the preset evaporation time threshold is t evap0 , the temperature change is ΔT, the preset temperature change threshold is ΔT0, and the rated temperature of the external cooler is T rated , the trigger condition formula is: Where k2 is the comprehensive trigger threshold, and 0 <k2≤1。 7. The efficient combined alkali carbon filtration production system according to claim 1, characterized in that: The external cooler cleaning module uses the specific external cooler vent valve opening time as the key condition for triggering cleaning. Suppose the specific external cooler vent valve opening time is t open3 , the preset vent valve opening time threshold is t open30 , the trigger condition formula is: t open3 ≥t open:30 +k6Δt open , Δt open is the measurement error of the vent valve opening time, k6 is the error correction coefficient, and 0 <k6≤1。 8. The efficient alkali-carbon filtration production system according to claim 1, characterized in that: The external cooler cleaning module uses the opening time of a specific external cooler vent valve as a key condition for triggering cleaning, and sets a time monitoring device to monitor the opening time of the vent valve. When a specific condition is reached, the cleaning operation is triggered. Specifically, the relevant vent valve is closed. The time for closing the relevant vent valve is t close-FQ , after the first set time interval Δt 1-open Then open the overflow valve of the specific external cooler, where t open-YL =t close-FQ +Δt 1-open , where t open-YL The time for opening the overflow valve, after the second set time interval Δt 2-open Then open the external cooler to clean the hot AI inlet valve, and the time relationship satisfies t open-AI =t open-YL +Δt 2-open , where t open-AI This is the time to open the external cooler to clean the hot AI inlet valve.

9. The efficient combined alkali carbon filtration production system according to claim 1, characterized in that: After completing a specific operation, the crystallization automatic car-changing subsystem sends a status signal to the carbonization automatic car-changing subsystem to inform it of the operating status of the crystallization part. The carbonization automatic car-changing subsystem adjusts its own operation accordingly. At the same time, key state changes of the carbonization automatic car-changing subsystem are fed back to the crystallization automatic car-changing subsystem, so that it can adjust its own operating parameters or trigger specific processes according to the state of the carbonization automatic car-changing subsystem.

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