Method and system for controlling head and tail simultaneous discharging of air locking hoppers of adsorption tower module group

Abstract

The invention relates to an adsorption tower module group air lock hopper head-tail simultaneous unloading control method and system, and the method comprises the steps: determining the unloading time duration of an air lock hopper and the operation speed of a chain bucket machine, and calculating the operation distance of the chain bucket machine in the unloading process of the air lock hopper according to the unloading time duration of the air lock hopper and the operation speed of the chain bucket machine; the distance between the two air lock hopper discharging valves is determined, the quotient of the operation distance of the chain bucket machine in the air lock hopper discharging process and the distance between the two air lock hopper discharging valves is calculated to be N ', and the number of the air lock hoppers strided by the chain bucket machine in the air lock hopper discharging process does not exceed N; wherein N = N '+ 1; two air locking hoppers with the difference of the serial numbers not smaller than N are determined to be parallel air locking hopper sets capable of discharging materials at the same time; executing a preset unloading strategy through the adsorption tower module group, and judging whether the parallel air locking hopper group meets a simultaneous unloading condition or not in the unloading strategy execution process; and if the simultaneous discharging condition is met, the parallel air locking hopper sets are controlled to conduct discharging at the same time.

Description

Technical Field

[0001] The present application relates to the field of automatic control technology, and in particular to a method and system for controlling simultaneous unloading of materials from the front and rear ends of an adsorption tower module group air lock hopper. Background Art

[0002] The countercurrent activated carbon desulfurization and denitrification process is a technology that uses activated carbon adsorbents to simultaneously remove sulfur dioxide and nitrogen oxides from flue gas. In the countercurrent operation mode, the flue gas and the adsorbent (activated carbon) contact in opposite directions. Generally, the flue gas enters from the top of the tower and meets the regenerated or unsaturated activated carbon flowing out from the bottom, forming a more complete contact, thereby improving the desulfurization and denitrification effect. The adsorption tower module group used in this process usually adopts a modular design to facilitate the expansion and maintenance of the system. Each module can be flexibly configured according to the on-site flue gas flow and pollutant concentration, which can not only meet the current working conditions, but also facilitate future upgrades.

[0003] When the countercurrent activated carbon desulfurization and denitrification process is applied to the flue gas desulfurization and denitrification scenarios of sintering machines with large flue gas volumes, a large number of adsorption tower modules are required. If the conventional sequence is used for unloading, there will be problems such as a high empty bucket rate of the chain bucket conveyor and limited circulation volume. Summary of the invention

[0004] In order to at least to some extent overcome the problems of using conventional order for unloading in the related art, such as high empty bucket rate and limited circulation volume of chain bucket conveyors, the present application provides a method and system for controlling simultaneous unloading of materials from the head to the tail of an adsorption tower module group with locked air buckets.

[0005] The scheme of this application is as follows: According to a first aspect of an embodiment of the present application, a method for controlling simultaneous unloading of gas hoppers at the head and tail of an adsorption tower module group is provided, comprising: Determine the unloading time length of the air lock bucket and the running speed of the chain bucket machine, and calculate the running distance of the chain bucket machine during the unloading process of the air lock bucket according to the unloading time length of the air lock bucket and the running speed of the chain bucket machine; Determine the distance between the discharge valves of the two air lock buckets, calculate the quotient of the running distance of the chain bucket conveyor during the air lock bucket unloading process and the distance between the two air lock bucket discharge valves as N', then the number of air lock buckets crossed by the chain bucket conveyor during the air lock bucket unloading process does not exceed N; where N=N'+1; Two air lock hoppers whose serial numbers differ by no less than N are determined as a parallel air lock hopper group that can unload materials simultaneously; Executing a preset unloading strategy through the adsorption tower module group, and determining whether the parallel air lock bucket group meets the simultaneous unloading conditions during the execution of the unloading strategy; If the conditions for simultaneous unloading are met, the parallel air lock bucket groups are controlled to unload simultaneously; The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; each adsorption tower module includes a gas lock hopper.

[0006] Preferably, the unloading strategy includes: Determine whether the current adsorption tower module meets the unloading conditions; If the current adsorption tower module meets the unloading conditions, the current adsorption tower module is controlled to unload; When the current adsorption tower module meets the stop unloading condition, control the current adsorption tower module to stop unloading; After the current adsorption tower module is unloaded, determine whether the next adsorption tower module meets the unloading conditions; Traverse all adsorption tower modules in numerical order.

[0007] Preferably, the unloading strategy further comprises: If the current adsorption tower module does not meet the unloading conditions, it is determined whether the next adsorption tower module meets the unloading conditions.

[0008] Preferably, during the execution of the unloading strategy, determining whether the parallel air-locking bucket group meets the simultaneous unloading conditions includes: When the Nth adsorption tower module is unloaded, the input status of all adsorption tower modules is determined; If the adsorption tower modules N+2 and thereafter are not put into operation and the total number of adsorption tower modules put into operation is not less than N+1, it is determined whether the first adsorption tower module and the N+1th adsorption tower module both meet the unloading conditions; If both the 1st adsorption tower module and the N+1th adsorption tower module satisfy the unloading conditions, it is determined that the 1st adsorption tower module and the N+1th adsorption tower module satisfy the simultaneous unloading conditions.

[0009] Preferably, the method further comprises: If the 1st adsorption tower module and the N+1th adsorption tower module fail to meet the simultaneous unloading conditions, it is determined whether the N+1th adsorption tower module meets the unloading conditions.

[0010] Preferably, during the execution of the unloading strategy, judging whether the parallel air-locking bucket group meets the simultaneous unloading condition further includes: If the 1st adsorption tower module and the N+1th adsorption tower module fail to meet the simultaneous unloading conditions, after the unloading of the N+1th adsorption tower module is completed, the input status of all adsorption tower modules is determined again; If the adsorption tower modules N+3 and thereafter are not put into operation and the total number of adsorption tower modules put into operation is not less than N+1, it is determined whether the first adsorption tower module and the N+2 adsorption tower module both meet the unloading conditions; If both the first adsorption tower module and the N+2th adsorption tower module meet the unloading conditions, it is determined that the first adsorption tower module and the N+2th adsorption tower module meet the simultaneous unloading conditions; The cycle is executed until the last adsorption tower module is unloaded.

[0011] Preferably, the method further comprises: Monitoring the material level in the air lock hopper; If the material level in the air lock hopper is higher than the preset high material level, it is determined that the current adsorption tower module meets the unloading conditions; If the material level in the air lock hopper is lower than a preset low material level, it is determined that the current adsorption tower module meets the conditions for stopping unloading.

[0012] Preferably, the adsorption tower module comprises: an upper module and a lower module; Determine the investment status of the adsorption tower module, including: Obtaining an upper module input mark and a lower module input mark of the adsorption tower module; If the upper module input mark and the lower module input mark of the adsorption tower module are both in the input state, it is determined that the adsorption tower module has been put into operation; If the upper module input mark or the lower module input mark of the adsorption tower module is in a non-input state, it is determined that the adsorption tower module is not put into operation.

[0013] Preferably, after the current adsorption tower module unloading is completed, the method further comprises: The preset time interval is used to determine whether the next adsorption tower module meets the unloading conditions.

[0014] According to a second aspect of the embodiment of the present application, a control system for simultaneously unloading materials from the front to the rear of an adsorption tower module group air lock hopper is provided, comprising: Adsorption tower module group, chain bucket conveyor and controller; The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; The adsorption tower module comprises: an upper module, a lower module and a gas lock hopper; The upper module and the lower module are connected to the feed port of the air lock hopper via a pneumatic valve; A pneumatic valve is provided at the discharge port of the air lock hopper; The chain bucket machine is arranged below the adsorption tower module group; The controller is used to execute a method for controlling simultaneous unloading of materials from the front to the rear of an adsorption tower module group air lock hopper as described in any one of the above items.

[0015] The technical solution provided by this application may have the following beneficial effects: The control method for simultaneous unloading of the front and rear ends of the air-locking buckets of the adsorption tower module group in the present application includes: determining the unloading time length of the air-locking bucket and the running speed of the chain bucket machine, and calculating the running distance of the chain bucket machine during the unloading process of the air-locking bucket according to the unloading time length of the air-locking bucket and the running speed of the chain bucket machine; determining the distance between the discharge valves of the two air-locking buckets, and calculating the quotient of the running distance of the chain bucket machine and the distance between the discharge valves of the two air-locking buckets during the unloading process of the air-locking bucket as N′, then the number of air-locking buckets crossed by the chain bucket machine during the unloading process of the air-locking bucket does not exceed N; wherein N=N′+1; determining two air-locking buckets whose number difference is not less than N as a parallel air-locking bucket group that can be unloaded simultaneously; executing a preset unloading strategy through the adsorption tower module group, and judging whether the parallel air-locking bucket group meets the simultaneous unloading conditions during the execution of the unloading strategy; if the simultaneous unloading conditions are met, controlling the parallel air-locking bucket group to unload simultaneously; wherein the adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; and each adsorption tower module includes an air-locking bucket.

[0016] In this technical solution, the above logic is used to determine whether there are air-locking buckets that can unload at the same time. Unloading simultaneously through parallel air-locking bucket groups can improve unloading efficiency, reduce empty bucket rate, and increase the circulation volume of the entire activated carbon desulfurization and denitrification system.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1 It is a flow chart of a method for controlling simultaneous unloading of gas hoppers at the head and tail of an adsorption tower module group provided by an embodiment of the present application; Figure 2 It is a schematic diagram of a discharge strategy flow in a method for controlling simultaneous discharge of materials from the front to the rear of an adsorption tower module group air lock hopper provided in an embodiment of the present application; Figure 3 It is a partial structural schematic diagram of a control system for simultaneous unloading of the front and rear ends of an adsorption tower module group air lock hopper provided by an embodiment of the present application; Figure 4 It is a structural schematic diagram of a control system for simultaneous unloading of materials from the front to the rear of an adsorption tower module group air lock hopper provided in one embodiment of the present application. DETAILED DESCRIPTION

[0020] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0021] Embodiment 1 Figure 1 This is a flow chart of a method for controlling simultaneous unloading of gas hoppers at the head and tail of an adsorption tower module group provided by an embodiment of the present application, referring to Figure 1 , a method for controlling simultaneous unloading of the gas lock hoppers of an adsorption tower module group, comprising: S11: determining the unloading time length of the air lock bucket and the running speed of the chain bucket machine, and calculating the running distance of the chain bucket machine during the unloading process of the air lock bucket according to the unloading time length of the air lock bucket and the running speed of the chain bucket machine; S12: Determine the distance between the discharge valves of the two air lock hoppers, calculate the quotient of the running distance of the chain bucket conveyor during the air lock hopper unloading process and the distance between the two air lock hopper discharge valves as N′, then the number of air lock hoppers crossed by the chain bucket conveyor during the air lock hopper unloading process does not exceed N; wherein N=N′+1; S13: Determine two air lock hoppers whose serial numbers differ by no less than N as a parallel air lock hopper group that can unload materials simultaneously; S14: executing a preset unloading strategy through the adsorption tower module group, and determining whether the parallel air lock bucket group meets the simultaneous unloading conditions during the unloading strategy execution process; S15: If the simultaneous unloading conditions are met, the parallel air lock bucket groups are controlled to unload simultaneously; The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; each adsorption tower module includes a gas lock hopper.

[0022] In specific practice, refer to Figure 3 The adsorption tower module includes an upper module and a lower module. Pneumatic valves are arranged on the pipeline connecting the adsorption tower module and the air lock hopper, which are the upper module feed valve and the lower module feed valve respectively. When the valve is opened, the activated carbon in the adsorption tower module flows into the air lock hopper along with the reciprocating action of the module unloading rake.

[0023] A pneumatic valve, called a discharge valve, is provided on the pipeline connecting the discharge port of the air lock bucket and the chain bucket machine. When the discharge valve is opened, the activated carbon in the air lock bucket flows into the chain bucket machine by itself.

[0024] like Figure 4In the control system for simultaneous unloading of the air lock hoppers at the head and tail of the adsorption tower module group shown, there are 11 adsorption tower modules in total, and the 11 module groups are arranged in a row. A air lock hopper is set under each adsorption tower module, and the bottom of the upper and lower modules are connected to the air lock hopper feed port through a pipeline. The activated carbon in the module is first discharged into the air lock hopper, and then discharged into the chain bucket machine at the bottom of the air lock hopper through the discharge port of the air lock hopper, and then transported to the analytical tower system by the chain bucket machine.

[0025] During implementation, the chain bucket machine has been running at a constant speed, and the chain bucket machine is covered with hoppers one by one. The hoppers run with the chain bucket machine, and the running direction is from the 1st group of modules to the 11th group of modules. When the air lock hopper discharge valve is opened, the material in the air lock hopper falls into the hopper of the chain bucket machine, and the hopper that receives the full material moves forward with the chain bucket machine, and the subsequent hoppers continue to receive the material. The discharge speed of the air lock hopper is adjusted by the manual valve, so that when the air lock hopper discharges the material, each hopper of the chain bucket machine can be filled with material without overflowing.

[0026] The status of all the above pneumatic valves and the status of the material level switch are all connected to the controller of the control system. The controller can control the opening and closing of all pneumatic valves; the sequential unloading of each module group and the simultaneous unloading function can be realized by programming in the controller.

[0027] by Figure 4 For example, if the time when the air lock bucket starts unloading is t1 and the time when the unloading ends is t2, the time length of the air lock bucket unloading is T=t2-t1.

[0028] The running speed of the chain bucket conveyor is a fixed value designed by the factory, which is Vm / s. Then, according to the unloading time length of the air lock bucket and the running speed of the chain bucket conveyor, the running distance of the chain bucket conveyor during the unloading process of the air lock bucket is calculated as L=V*T (m).

[0029] Assume that the distance between the discharge valves of the two air-locking hoppers is L1, then the distance that the chain bucket conveyor runs during the unloading process of the air-locking hoppers is converted to the number N′=L / L1 of L1; therefore, the number of air-locking hoppers that the chain bucket conveyor crosses during the unloading process of the air-locking hoppers does not exceed N=N′+1; it can be concluded that in the unloading process of the air-locking hoppers of the first group of modules, at the end of the unloading of the air-locking hoppers, the first hopper filled with materials will run as far as the bottom of the air-locking hopper of the Nth module group. Then it can be concluded that the first air-locking hopper and one of the (N+1) and subsequent air-locking hoppers can unload at the same time, and there will be no material overflow from the hopper on the chain bucket conveyor. In other words, if the difference in the numbers of the two air-locking hoppers is not less than N, the two air-locking hoppers can unload at the same time. The above parameters can be derived for each project based on actual conditions, combined with Figure 4 The on-site situation of the example is calculated, N=8, then Figure 4 In the example, the parallel air lock bucket groups that can unload simultaneously are numbered: 1 and 9, 1 and 10, 2 and 10; 1 and 11, 2 and 11; 3 and 11.

[0030] It should be noted that the unloading strategy includes: S21: Determine whether the current adsorption tower module meets the unloading conditions; S22: If the current adsorption tower module meets the unloading conditions, control the current adsorption tower module to unload; S23: When the current adsorption tower module meets the stop unloading condition, control the current adsorption tower module to stop unloading; S24: After the current adsorption tower module is unloaded, determine whether the next adsorption tower module meets the unloading conditions; S25: Traverse all adsorption tower modules in order of numbering.

[0031] The controller starts judging from adsorption tower module No. 1. If the air lock hopper of adsorption tower module No. 1 does not meet the unloading conditions, it judges whether the next adsorption tower module meets the unloading conditions. If the air lock hopper of adsorption tower module No. 1 meets the unloading conditions, the upper module feed valve and the lower module feed valve are closed at this time. After all the feed valves are closed, the air lock hopper discharge valve is opened, and adsorption tower module No. 1 starts unloading. Until adsorption tower module No. 1 meets the conditions for stopping unloading, the current adsorption tower module is controlled to stop unloading, the air lock hopper discharge valve is closed, the air lock hopper unloading is completed, and the control system starts to judge the next adsorption tower module. According to the above logic, each adsorption tower module is judged one by one.

[0032] It should be noted that during the execution of the unloading strategy, whether the parallel air lock bucket group meets the simultaneous unloading conditions is judged, including: When the Nth adsorption tower module is unloaded, the input status of all adsorption tower modules is determined; If the adsorption tower modules N+2 and thereafter are not put into operation and the total number of adsorption tower modules put into operation is not less than N+1, it is determined whether the first adsorption tower module and the N+1th adsorption tower module both meet the unloading conditions; If both the 1st adsorption tower module and the N+1th adsorption tower module satisfy the unloading conditions, it is determined that the 1st adsorption tower module and the N+1th adsorption tower module satisfy the simultaneous unloading conditions.

[0033] Furthermore, the method also includes: If the 1st adsorption tower module and the N+1th adsorption tower module fail to meet the simultaneous unloading conditions, it is determined whether the N+1th adsorption tower module meets the unloading conditions.

[0034] Based on this, during the execution of the unloading strategy, it is judged whether the parallel air lock bucket group meets the simultaneous unloading conditions, and also includes: If the 1st adsorption tower module and the N+1th adsorption tower module fail to meet the simultaneous unloading conditions, after the unloading of the N+1th adsorption tower module is completed, the input status of all adsorption tower modules is determined again; If the adsorption tower modules N+3 and thereafter are not put into operation and the total number of adsorption tower modules put into operation is not less than N+1, it is determined whether the first adsorption tower module and the N+2 adsorption tower module both meet the unloading conditions; If both the first adsorption tower module and the N+2th adsorption tower module meet the unloading conditions, it is determined that the first adsorption tower module and the N+2th adsorption tower module meet the simultaneous unloading conditions; The cycle is executed until the last adsorption tower module is unloaded.

[0035] by Figure 4 For example, when the No. 8 adsorption tower module is executed, the input status of all adsorption tower modules is judged. If No. 10 and No. 11 are not put into operation and the total number of groups put into operation is not less than 9 (this is the condition for the first simultaneous unloading of the first and last modules), then it is judged whether the air lock buckets of the No. 9 adsorption tower module and the No. 1 adsorption tower module meet the unloading conditions. If both meet the unloading conditions, then the air lock buckets of the No. 9 adsorption tower module and the No. 1 adsorption tower module can be unloaded at the same time to improve the unloading efficiency, reduce the empty bucket rate, and increase the circulation volume of the entire activated carbon desulfurization and denitrification system. After the unloading of the No. 9 adsorption tower module is completed, it is equivalent to the end of the previous cycle judgment; the judgment of the unloading condition of the No. 1 adsorption tower module represents the beginning of the next cycle judgment. If the conditions for the first simultaneous unloading of the first and last modules are not met, then at the end of the execution of the No. 8 adsorption tower module, continue to judge whether the air lock buckets of the No. 9 / 10 / 11 adsorption tower modules meet the unloading conditions one by one, until the air lock bucket of the last group of modules is unloaded, and then start judging from the No. 1 adsorption tower module.

[0036] If the conditions for the first simultaneous unloading of the first and last modules are not met, when the No. 9 adsorption tower module is executed in the established order, the input status of all module groups is judged again. If the No. 11 adsorption tower module is not put into use and the total number of groups put into use is not less than 9 (this is the condition for the second simultaneous unloading of the first and last modules), it can be judged whether the air lock buckets of the No. 10 adsorption tower module and the first group of modules have the unloading conditions at the same time. If both have the unloading conditions, the air lock buckets of the No. 10 adsorption tower module and the No. 1 adsorption tower module can be unloaded at the same time. After the unloading of the No. 10 adsorption tower module is completed, it is equivalent to the end of the previous cycle judgment; the judgment of the unloading condition of the No. 1 adsorption tower module represents the beginning of the next cycle judgment. If the conditions for the second simultaneous unloading of the first and last modules are not met, then at the end of the execution of the No. 9 group of modules, continue to judge whether the air lock buckets of the No. 10 / 11 adsorption tower modules meet the unloading conditions one by one, until the air lock bucket of the last group of modules is unloaded, and then judge from the No. 1 adsorption tower module.

[0037] If the conditions for the first and second simultaneous unloading of the head and tail are not met, when the No. 10 adsorption tower module is executed in the established order, the input status of all module groups is judged again. If the total number of groups invested is not less than 9 (this is the condition for the third simultaneous unloading of the head and tail), it can be judged at the same time whether the air lock buckets of the No. 11 adsorption tower module and the No. 1 adsorption tower module meet the unloading conditions. If both meet the unloading conditions, the air lock buckets of the No. 11 adsorption tower module and the No. 1 adsorption tower module can be unloaded at the same time. After the unloading of the No. 11 adsorption tower module is completed, it is equivalent to the end of the previous cycle judgment; the judgment of the unloading conditions of the No. 1 adsorption tower module represents the beginning of the next cycle judgment. If the conditions for the third simultaneous unloading of the head and tail are not met, then at the end of the execution of the No. 10 adsorption tower module, continue to judge whether the air lock bucket of the No. 11 adsorption tower module meets the unloading conditions until the air lock bucket of this group of modules is unloaded, and then start judging from the No. 1 adsorption tower module.

[0038] It should be noted that the method also includes: Monitor the material level in the air lock hopper; If the material level in the air lock hopper is higher than the preset high material level, it is determined that the current adsorption tower module meets the unloading conditions; If the material level in the air lock hopper is lower than the preset low material level, it is determined that the current adsorption tower module meets the conditions for stopping unloading.

[0039] In specific practice, a high material level sensor and a low material level sensor can be set at a suitable position of the air lock hopper to detect the material level in the air lock hopper. When the high material level sensor has a signal, it means that the material level in the air lock hopper is higher than the preset high material level (the air lock hopper is in a full state, and the unloading conditions are met at this time), and it is determined that the current adsorption tower module meets the unloading conditions; when the low material level sensor has a signal, it means that the material level in the air lock hopper is lower than the preset low material level (the air lock hopper is in an empty state, and the unloading needs to be stopped at this time), and it is determined that the current adsorption tower module meets the stop unloading conditions.

[0040] It should be noted that the adsorption tower module includes: an upper module and a lower module; Determine the investment status of the adsorption tower module, including: Obtaining an upper module input mark and a lower module input mark of the adsorption tower module; If the upper module input mark and the lower module input mark of the adsorption tower module are both in the input state, it is determined that the adsorption tower module has been put into operation; If the upper module input mark or the lower module input mark of the adsorption tower module is in a non-input state, it is determined that the adsorption tower module is not put into operation.

[0041] In this embodiment, each module is provided with an input state mark in the control system, and the input or non-input state of each module is determined by the operator according to the actual situation of the equipment. When the upper module and the lower module of the module group are both in the input state, the module group is considered to be in the input state.

[0042] It should be noted that after the current adsorption tower module is unloaded, the method further includes: The preset time interval is used to determine whether the next adsorption tower module meets the unloading conditions.

[0043] By setting a reasonable interval time, the modular adsorption tower can be traversed in an orderly manner, forming a scientific unloading scheduling strategy, and improving the overall system operation efficiency and economic benefits. After the unloading of the current adsorption tower module is completed, a certain waiting time is reserved so that the entire system has enough time to restore balance and stabilize relevant parameters (such as temperature, pressure and flow rate, etc.) to avoid system fluctuations caused by continuous operation. The interval time can prevent multiple modules from starting unloading too close to each other continuously, reduce possible interference and conflicts between equipment, and thus achieve an orderly and synchronous unloading process.

[0044] Embodiment 2 A control system for simultaneous unloading of the gas hopper head and tail of an adsorption tower module group, referring to Figure 3-Figure 4 ,include: Adsorption tower module group, chain bucket conveyor and controller; The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; The adsorption tower module includes: an upper module, a lower module and a gas lock hopper; The upper module and the lower module are connected to the feed port of the air lock hopper through a pneumatic valve; A pneumatic valve is provided at the discharge port of the air lock hopper; The chain bucket conveyor is arranged below the adsorption tower module group; The controller is used to execute a method for controlling simultaneous unloading of materials from the front to the rear of an adsorption tower module group air lock hopper as in the above embodiment.

[0045] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0046] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0047] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0048] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0049] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0050] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0051] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for controlling simultaneous unloading of the gas hoppers at the head and tail of an adsorption tower module group, characterized in that: include: Determine the unloading time length of the air lock bucket and the running speed of the chain bucket machine, and calculate the running distance of the chain bucket machine during the unloading process of the air lock bucket according to the unloading time length of the air lock bucket and the running speed of the chain bucket machine; Determine the distance between the discharge valves of the two air lock buckets, calculate the quotient of the running distance of the chain bucket conveyor during the air lock bucket unloading process and the distance between the two air lock bucket discharge valves as N', then the number of air lock buckets crossed by the chain bucket conveyor during the air lock bucket unloading process does not exceed N; where N=N'+1; Two air lock hoppers whose serial numbers differ by no less than N are determined as a parallel air lock hopper group that can unload materials simultaneously; Executing a preset unloading strategy through the adsorption tower module group, and determining whether the parallel air lock bucket group meets the simultaneous unloading conditions during the execution of the unloading strategy; If the conditions for simultaneous unloading are met, the parallel air lock bucket groups are controlled to unload simultaneously; The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; each adsorption tower module includes a gas lock hopper.

2. The method according to claim 1, characterized in that: The unloading strategy includes: Determine whether the current adsorption tower module meets the unloading conditions; If the current adsorption tower module meets the unloading conditions, the current adsorption tower module is controlled to unload; When the current adsorption tower module meets the stop unloading condition, control the current adsorption tower module to stop unloading; After the current adsorption tower module is unloaded, determine whether the next adsorption tower module meets the unloading conditions; Traverse all adsorption tower modules in numerical order.

3. The method according to claim 2, characterized in that The unloading strategy also includes: If the current adsorption tower module does not meet the unloading conditions, it is determined whether the next adsorption tower module meets the unloading conditions.

4. The method according to claim 2, characterized in that: During the execution of the unloading strategy, judging whether the parallel air lock bucket group meets the simultaneous unloading conditions includes: When the Nth adsorption tower module is unloaded, the input status of all adsorption tower modules is determined; If the adsorption tower modules N+2 and thereafter are not put into operation and the total number of adsorption tower modules put into operation is not less than N+1, it is determined whether the first adsorption tower module and the N+1th adsorption tower module both meet the unloading conditions; If both the 1st adsorption tower module and the N+1th adsorption tower module satisfy the unloading conditions, it is determined that the 1st adsorption tower module and the N+1th adsorption tower module satisfy the simultaneous unloading conditions.

5. The method according to claim 4, characterized in that The method further comprises: If the 1st adsorption tower module and the N+1th adsorption tower module fail to meet the simultaneous unloading conditions, it is determined whether the N+1th adsorption tower module meets the unloading conditions.

6. The method according to claim 5, characterized in that During the execution of the unloading strategy, determining whether the parallel air lock bucket group meets the simultaneous unloading conditions also includes: If the 1st adsorption tower module and the N+1th adsorption tower module fail to meet the simultaneous unloading conditions, after the unloading of the N+1th adsorption tower module is completed, the input status of all adsorption tower modules is determined again; If the adsorption tower modules N+3 and thereafter are not put into operation and the total number of adsorption tower modules put into operation is not less than N+1, it is determined whether the first adsorption tower module and the N+2 adsorption tower module both meet the unloading conditions; If both the first adsorption tower module and the N+2th adsorption tower module meet the unloading conditions, it is determined that the first adsorption tower module and the N+2th adsorption tower module meet the simultaneous unloading conditions; The cycle is executed until the last adsorption tower module is unloaded.

7. The method according to claim 1, characterized in that The method further comprises: Monitoring the material level in the air lock hopper; If the material level in the air lock hopper is higher than the preset high material level, it is determined that the current adsorption tower module meets the unloading conditions; If the material level in the air lock hopper is lower than a preset low material level, it is determined that the current adsorption tower module meets the conditions for stopping unloading.

8. The method according to claim 4, characterized in that The adsorption tower module comprises: an upper module and a lower module; Determine the investment status of the adsorption tower module, including: Obtaining an upper module input mark and a lower module input mark of the adsorption tower module; If the upper module input mark and the lower module input mark of the adsorption tower module are both in the input state, it is determined that the adsorption tower module has been put into operation; If the upper module input mark or the lower module input mark of the adsorption tower module is in a non-input state, it is determined that the adsorption tower module is not put into operation.

9. The method according to claim 2, characterized in that: After the current adsorption tower module unloading is completed, the method further includes: The preset time interval is used to determine whether the next adsorption tower module meets the unloading conditions.

10. A control system for simultaneous unloading of materials from the front and rear of an adsorption tower module group air lock hopper, characterized in that: include: Adsorption tower module group, chain bucket conveyor and controller; The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; The adsorption tower module comprises: an upper module, a lower module and a gas lock hopper; The upper module and the lower module are connected to the feed port of the air lock hopper via a pneumatic valve; A pneumatic valve is provided at the discharge port of the air lock hopper; The chain bucket machine is arranged below the adsorption tower module group; The controller is used to execute the method for controlling simultaneous unloading of the front and rear ends of the air lock hopper of an adsorption tower module group as described in any one of claims 1 to 9.

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