Linkage control method for multiple reactors and feeding links

Abstract

The present invention discloses a method for controlling linkage between multiple reactors and a feeding link, including a feeding device composed of multiple sub-devices, an external auxiliary system, a dust collector, a complete set of reactors controlled by a feeding valve, and a programmable controller. The programmable controller uses an electrical instrument automation method to control the feeding device, the external auxiliary system, the dust collector, and the complete set of reactors. The software programming logic of the programmable controller includes a feeding module, a ranking module, and a safety interlocking module. The feeding module controls the feeding device to perform feeding operations on the complete set of reactors. During the feeding process, the ranking module arranges the positions of the complete set of reactors. The present invention realizes efficient linkage between feeding sections, has a stable control process, and is highly safe, thereby improving the level of automated, intelligent, continuous and stable production of xylose production.

Description

Technical Field

[0001] The invention relates to the technical field of feeding control, in particular to a method for controlling multiple sets of reaction kettles and feeding links in linkage. Background Art

[0002] In the modern industrial production process of xylose, multiple hydrolysis reactors are used for mass production. However, the reactors are all semi-automatically controlled with a low degree of automation. The loading process is performed manually, and the reactor operations are relatively frequent. The labor intensity is high, and the operators are often not careful during operation, resulting in frequent equipment standby conditions. At the same time, the raw materials added to the hydrolysis reactor are all biomass materials such as corn cobs. The starting raw materials have many impurities and cannot be directly put into the hydrolysis reactor for production. A variety of equipment is needed to pretreat the raw materials before feeding. If the processes between the raw materials and the hydrolysis reactor are all manually operated, the instability of the control process will increase, which can easily lead to the inability to effectively link production between the various equipment, resulting in unstable continuous operation of the process and the inability to meet the process and production capacity of each stage of production. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art that each device operates independently and has a low degree of automation and cannot be linked and controlled for production, and to provide an automated, intelligent, highly safe, continuous and stable production method for linking multiple sets of reactors and loading links.

[0004] The object of the present invention is achieved through the following technical scheme: a method for controlling multiple sets of reactors in linkage with a loading link, comprising a loading device composed of multiple sub-equipment, an external auxiliary system, a dust collector, a complete set of reactors controlled by a discharge valve, and a programmable controller. The programmable controller controls the loading device, the external auxiliary system, the dust collector, and the complete set of reactors through an electrical instrument automation method. The software programming logic of the programmable controller includes a loading module, a ranking module, and a safety interlock module. The loading module controls the loading device to load the complete set of reactors. During the loading process, the ranking module arranges the positions of the complete set of reactors.

[0005] Preferably, the safety interlock module has a higher processing priority than the loading module and the ranking module.

[0006] Preferably, the ranking method of the ranking module is:

[0007] S1. The ranking module detects whether there is a request to load the kettle. If there is no request, the loading module will not execute and continue to wait. If there is a request, the unloading valve of the reactor with the ranking number "1" will be opened, and the liquid level gauge of the current reactor will be activated and the loading steps of the loading module will be executed;

[0008] S2. The liquid level gauge of the reactor with the current serial number "1" determines whether the requirements are met. If not, the loading module executes and continues to wait. If the requirements are met, the unloading valve of the current reactor is closed and the reactor with the current number "1" is removed from the ranking. The serial numbers of the remaining reactors are -1;

[0009] S3. The loading module is paused and the unloading valve of the reactor ranked "1" is executed;

[0010] S4. After the unloading valve currently ranked as "1" is opened, the loading module executes the loading step;

[0011] S5. The current ranking sequence is cleared, indicating that there is no reactor that needs to be loaded, so the loading module stops, and all sub-equipment of the loading equipment is shut down synchronously;

[0012] S6. Wait for the ranking signal. If not met, continue waiting. If met, the loading module executes the loading step.

[0013] Preferably, the feeding method of the feeding module is:

[0014] S1. The loading module starts the external auxiliary system first;

[0015] S2. The feeding module starts the sub-equipment of the feeding equipment step by step from the back to the front until all the sub-equipment are running;

[0016] S3. When the loading module is paused, all sub-equipment of the loading equipment will be paused synchronously.

[0017] Preferably, the sub-equipment of the feeding equipment includes a small-angle belt, a drum screen, a washing box, a screen belt, a large-angle belt, and a flat belt. The small-angle belt, the drum screen, the washing box, the screen belt, the large-angle belt, the flat belt, and the complete set of reactors transfer materials in sequence from front to back.

[0018] Preferably, the external auxiliary system includes an induced draft system and a washing water system. The induced draft system includes an induced draft fan. The washing water system includes a washing water valve, a flow meter, a drain valve, a water pump, a water tank level, a water pumping flow, and a water storage tank. The induced draft fan removes dust from the drum screen through the dust collector, and the washing water system forms circulating water cleaning for the material in the washing box and the screen belt.

[0019] Preferably, the safety interlock module controls the start and stop of the water pump according to the water tank liquid level signal, controls the feeding module to stop according to the sub-equipment fault signal of the feeding equipment, and alarms according to the induced draft fan and water pump fault signals.

[0020] The present invention has the following advantages:

[0021] 1. The present invention provides a linkage control method for multiple sets of reactors and feeding links, which is suitable for the xylose production industry. The ranking module is set to realize the orderly feeding function of multiple sets of reactors one by one, and the feeding module is set to realize the safety control of the feeding equipment. The two effectively cooperate to solve the problem that the existing equipment cannot continuously and stably feed the production, realize the efficient linkage between the feeding sections, improve the automation and intelligent production level of the existing equipment, streamline the personnel, reduce the labor intensity, increase the production efficiency, and enhance the production capacity value.

[0022] 2. The safety interlock module can automatically and quickly alarm or shut down the equipment according to the faults of different equipment. Compared with manual control by personnel, it reduces the instability in the control process and avoids the increase of fault categories, difficulty and duration of maintenance caused by untimely shutdown of equipment.

[0023] 3. By adding an induced draft system and a washing water system during the feeding and conveying process, the sand, gravel and dust generated by biomass materials such as corn cobs can be recycled, which improves the process environmental protection requirements of the equipment, protects the environment, ensures occupational health, and builds a green smart factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall diagram of the equipment structure of the present invention;

[0025] Figure 2 It is the first part of the sequential control logic diagram of the present invention;

[0026] Figure 3 It is the second part of the sequential control logic diagram of the present invention;

[0027] Figure 4 It is the third part of the sequential control logic diagram of the present invention;

[0028] Figure 5 It is the safety interlock and alarm logic diagram of the present invention;

[0029] Figure 6 It is a ranking program diagram of the reaction kettle and the material feeding linkage control of the present invention.

[0030] In the figure, 1. feeding equipment; 11. low-angle belt; 12. drum screen; 13. washing box; 14. screen belt; 15. high-angle belt; 16. flat belt; 2. induced draft system; 21. induced draft fan; 3. washing water system; 31. washing water valve; 32. flow meter; 33. drain valve; 34. water pump; 35. water tank level; 36. pumping flow; 37. water storage tank; 4. dust collector; 5. complete reactor; 51. first unloading valve; 52. second unloading valve; 53. third unloading valve; 54. fourth unloading valve; 55. fifth unloading valve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] The present invention uses corn cobs as raw materials to mass produce xylose, and is suitable for linkage control between corn cob pretreatment equipment and hydrolysis reactors before the hydrolysis process. The raw materials of the xylose industry are biomass such as corn cobs, which has the disadvantages of more dust and the need to recycle the dust during the transportation process. Secondly, there are many impurities and washing is required, such as Figure 1 As shown, the production equipment includes a feeding device 1, an external auxiliary system, a dust collector 4, a complete reactor 5 controlled by a discharge valve, and a programmable controller. The programmable controller is electrically connected to the feeding device 1, the external auxiliary system, the dust collector 4, and the complete reactor 5. The feeding device 1 uses multiple sub-equipment to pre-treat the corn cobs and gradually feed them. The sub-equipment of the feeding device 1 includes a small-angle belt 11, a drum screen 12, a washing box 13, a screen belt 14, a large-angle belt 15, and a flat belt 16. The small-angle belt 11, the drum screen 12, the washing box 13, the screen belt 14, the large-angle belt 15, the flat belt 16, and the complete reactor 5 are connected in sequence from front to back and from left to right for material transmission. The external auxiliary system includes an induced draft system 2 and a washing water system 3. The induced draft system 2 includes an induced draft fan 21. The washing water system 3 includes a washing water valve 31, a flow meter 32, and a drain valve 33, water pump 34, water tank level 35, water flow 36, water storage tank 37, the small angle belt 11 is responsible for conveying the corn cob raw material to the drum screen 12, the induced draft fan 21 forms a negative pressure dust removal for the drum screen 12 through the dust collector 4, the raw material after dust removal is discharged into the washing box 13 for circulating water cleaning, the used circulating water is discharged into the water storage tank 37 for precipitation filtration to remove impurities, and then the circulating water is returned to the washing box 13 for use under the action of the water pump 34, the washed biomass raw material is finally loaded into the reactor through the screen belt 14, the large angle belt 15, and the flat belt 16. The complete set of reactors 5 is provided with 5 hydrolysis reactors, each of which is controlled by a discharge valve, that is, the complete set of reactors 5 is provided with 5 discharge valves, namely the first discharge valve 51, the second discharge valve 52, the third discharge valve 53, the fourth discharge valve 54, and the fifth discharge valve 55.

[0033] The programmable controller is used to realize the start and stop of the feeding equipment 1, the induced draft system 2, and the washing water system 3 and the related data processing functions. The software program modules in the programmable controller include the feeding module, the ranking module, the safety interlock module, and the linkage control method of multiple sets of reactors and the feeding link, such as Figure 2 , Figure 3 , Figure 4 , Figure 6 As shown, follow the steps below:

[0034] S1. The ranking module detects whether there is a request to load the kettle. If there is no request, the loading module will not execute and continue to wait. If there is a request, the unloading valve of the reactor with the ranking number "1" will be opened, and the liquid level gauge of the current reactor will be activated and the loading steps of the loading module will be executed;

[0035] S2. Start the external auxiliary system, establish the dust recovery system 2, start the induced draft fan 21, establish the washing system 3, and open the washing water valve 31;

[0036] S3. Start the flat belt 16, activate the timer T1, start the high-angle conveyor belt 15 after T1 is satisfied, activate the timer T2, start the screen belt 14 and the washing box 13 after T2 is satisfied, activate the timer T3, start the drum screen 12 after T3 is satisfied, activate T4, start the low-angle belt 11 after T4 is satisfied, and complete the start of feeding. If any node of the low-angle belt 11, the drum screen 12, the washing box 13, the screen belt 14, the high-angle belt 15, and the flat belt 16 is not started successfully, an alarm will be issued after 3S.

[0037] S4. The liquid level gauge of the reactor with the current serial number "1" determines whether the requirements are met. If not, the loading module executes and continues to wait. If the requirements are met, the unloading valve of the current reactor is closed and the reactor with the current number "1" is removed from the ranking. The serial numbers of the remaining reactors are -1;

[0038] S5. The loading module is paused, and the unloading valve of the reactor ranked "1" is executed;

[0039] S6. After the unloading valve currently ranked as "1" is opened, the loading module executes step S3;

[0040] S7. The current ranking sequence is cleared, indicating that there is no reactor to be loaded, and the loading module stops, and all sub-equipment of the loading device 1 is shut down simultaneously: small-angle belt 11, drum screen 12, washing box 13, screen belt 14, large-angle belt 15, flat belt 16;

[0041] S8. Wait for the ranking signal. If not met, continue waiting. If met, the loading module executes the loading step S3.

[0042] During the linkage control process, equipment failures are handled by the safety interlock module. The safety interlock module has a higher processing priority than the loading module and the ranking module, and is an important part of ensuring safe production of the production line. Figure 5As shown, the safety interlock module controls the start and stop of the water pump 34 according to the liquid level signal of the water tank 37. The liquid level signal of the water tank 37 is transmitted to the programmable controller, and the logic determines whether the liquid level is within the set range to decide whether to start or stop the water pump 34. If a blockage failure occurs in any section of the sub-equipment of the feeding device 1 during the feeding process, it will seriously affect the entire feeding system. If a sub-equipment of the feeding device 1 fails, any fault signal will control the feeding module to stop, that is, the small-angle belt 11, the drum screen 12, the washing box 13, the screen belt 14, the large If any of the inclined belt 15 and the flat belt 16 fails, the safety interlock module will control the small-angle belt 11, the drum screen 12, the washing box 13, the screen belt 14, the large-angle belt 15, and the flat belt 16 to stop synchronously to avoid further expansion of the failure due to continued feeding. The failure of the induced draft fan 21 and the water pump 34 in the external auxiliary system will not directly cause damage to the feeding equipment. The safety interlock module will alarm according to the fault signals of the induced draft fan 21 and the water pump 34 to remind personnel to deal with it in time, and will not control the production line to directly suspend feeding.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling multiple sets of reactors and loading links in linkage, characterized in that: The invention comprises a feeding device (1) composed of a plurality of sub-devices, an external auxiliary system, a dust collector (4), a complete set of reactors (5) controlled by a discharge valve, and a programmable controller. The programmable controller controls the feeding device (1), the external auxiliary system, the dust collector (4), and the complete set of reactors (5) through an electrical instrument automation method. The software programming logic of the programmable controller comprises a feeding module, a ranking module, and a safety interlocking module. The feeding module controls the feeding device (1) to perform a feeding operation on the complete set of reactors (5). During the feeding process, the ranking module arranges the positions of the complete set of reactors (5).

2. A method for controlling linkage between multiple sets of reaction kettles and feeding links according to claim 1, characterized in that: The safety interlock module has a higher processing priority than the loading module and the ranking module.

3. A method for controlling linkage between multiple sets of reaction kettles and feeding links according to claim 2, characterized in that: The ranking method of the ranking module is: S1. The ranking module detects whether there is a request for loading. If there is no request, the loading module does not execute and continues to wait. If there is a request, the unloading valve of the reactor with the ranking number "1" is opened, and the liquid level gauge of the current reactor is activated and the loading step of the loading module is executed; S2. The liquid level gauge of the reactor with the current serial number "1" determines whether the requirements are met. If not, the loading module executes and continues to wait. If the requirements are met, the unloading valve of the current reactor is closed and the reactor with the current number "1" is removed from the ranking. The serial numbers of the remaining reactors are -1; S3. The loading module is paused and the unloading valve of the reactor ranked "1" is executed; S4. After the unloading valve currently ranked "1" is opened, the loading module performs the loading step; S5. The current ranking sequence is cleared, indicating that there is no reactor that needs to be loaded, then the loading module stops, and all sub-devices of the loading device (1) are shut down synchronously; S6. Wait for the ranking signal. If not met, continue waiting. If met, the loading module executes the loading step.

4. A method for controlling linkage between multiple sets of reaction kettles and feeding links according to claim 3, characterized in that: The steps of the feeding method of the feeding module are as follows: S1. The loading module starts the external auxiliary system first; S2. The feeding module starts the sub-devices of the feeding device (1) step by step from back to front until all sub-devices are running; S3. When the loading module is paused, all sub-equipment of the loading equipment (1) are paused synchronously.

5. A method for controlling linkage between multiple sets of reaction kettles and feeding links according to any one of claims 1 to 4, characterized in that: The sub-equipment of the feeding device (1) comprises a small-angle belt (11), a drum screen (12), a washing box (13), a screen belt (14), a large-angle belt (15), and a flat belt (16); the small-angle belt (11), the drum screen (12), the washing box (13), the screen belt (14), the large-angle belt (15), the flat belt (16), and the complete set of reaction kettles (5) are used to sequentially transfer materials from front to back.

6. A method for controlling linkage between multiple sets of reaction kettles and feeding links according to claim 5, characterized in that: The external auxiliary system comprises an induced draft system (2) and a washing water system (3); the induced draft system (2) comprises an induced draft fan (21); the washing water system (3) comprises a washing water valve (31), a flow meter (32), a drain valve (33), a water pump (34), a water tank liquid level (35), a water pumping flow rate (36), and a water storage tank (37); the induced draft fan (21) removes dust from the drum screen (12) through the dust collector (4); and the washing water system (3) cleans the materials in the washing box (13) and the screen belt (14) with circulating water.

7. A method for controlling linkage between multiple sets of reaction kettles and feeding links according to claim 6, characterized in that: The safety interlock module controls the start and stop of the water pump (34) according to the liquid level signal of the water storage tank (37), controls the loading module to stop according to the sub-equipment fault signal of the loading equipment (1), and issues an alarm according to the fault signals of the induced draft fan (21) and the water pump (34).

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