A control method and system for simultaneous discharging at both the head and the tail of the air-lock hopper of an adsorption tower module group

Abstract

The present application relates to a method and system for controlling the simultaneous discharging of the first and last air-lock hoppers in an adsorption tower module group. The method includes: determining the discharging time length of the air-lock hoppers and the running speed of the chain bucket conveyor, and calculating the running distance of the chain bucket conveyor during the discharging process of the air-lock hoppers according to the discharging time length of the air-lock hoppers and the running speed of the chain bucket conveyor; determining the distance between two discharging valves of the air-lock hoppers, and calculating the quotient of the running distance of the chain bucket conveyor during the discharging process of the air-lock hoppers and the distance between the two discharging valves of the air-lock hoppers as N'; then the number of air-lock hoppers straddled by the chain bucket conveyor during the discharging process of the air-lock hoppers does not exceed N; where N = N' + 1; determining two air-lock hoppers with a number difference of not less than N as a parallel air-lock hopper group that can be simultaneously discharged; executing a preset discharging strategy through the adsorption tower module group, and judging whether the parallel air-lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy; if the simultaneous discharging condition is met, controlling the parallel air-lock hopper group to discharge simultaneously.

Description

Technical Field

[0001] This application relates to the field of automatic control technology, and particularly to a method and system for controlling the simultaneous discharging at the head and tail of the air-lock hoppers of an adsorption tower module group. 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 in flue gas. In the countercurrent operation mode, the flue gas and the adsorbent (activated carbon) come into 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 more sufficient contact, thereby improving the desulfurization and denitrification effect. The adsorption tower module group used in this process usually adopts a modular design, which is convenient for system expansion and maintenance. Each module can be flexibly configured according to the on-site flue gas flow rate and pollutant concentration, which can not only meet the current working conditions but also facilitate future upgrades and transformations.

[0003] When the countercurrent activated carbon desulfurization and denitrification process is applied to the flue gas desulfurization and denitrification scenario of a sintering machine with a large flue gas volume, a large number of adsorption tower modules are required. If the conventional sequential discharging method is used, there are problems such as a high empty hopper rate of the chain bucket elevator and limited circulation volume. Summary of the Invention

[0004] To at least overcome to some extent the problems in the related art that when using the conventional sequential discharging method, there is a high empty hopper rate of the chain bucket elevator and limited circulation volume, this application provides a method and system for controlling the simultaneous discharging at the head and tail of the air-lock hoppers of an adsorption tower module group.

[0005] The solution of this application is as follows:

[0006] According to the first aspect of the embodiments of this application, a method for controlling the simultaneous discharging at the head and tail of the air-lock hoppers of an adsorption tower module group is provided, including:

[0007] Determine the discharging time length of the air-lock hopper and the running speed of the chain bucket elevator, and calculate the running distance of the chain bucket elevator during the discharging process of the air-lock hopper according to the discharging time length of the air-lock hopper and the running speed of the chain bucket elevator;

[0008] Determine the distance between two air-lock hopper discharge valves, and calculate the quotient of the running distance of the chain bucket elevator during the discharging process of the air-lock hopper 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 elevator during the discharging process of the air-lock hopper does not exceed N; where N = N′ + 1;

[0009] Determine two air-lock hoppers with a difference in numbers not less than N as a parallel air-lock hopper group that can be simultaneously discharged;

[0010] Execute a preset discharging strategy through the adsorption tower module group, and determine whether the parallel air-lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy;

[0011] If the simultaneous discharging condition is satisfied, control the parallel lock hopper group to discharge simultaneously;

[0012] Among them, the adsorption tower module group includes multiple sequentially numbered adsorption tower modules; each adsorption tower module includes a lock hopper.

[0013] Preferably, the discharging strategy includes:

[0014] Judge whether the current adsorption tower module meets the discharging condition;

[0015] If the current adsorption tower module meets the discharging condition, control the current adsorption tower module to discharge;

[0016] When the current adsorption tower module meets the stop discharging condition, control the current adsorption tower module to stop discharging;

[0017] After the current adsorption tower module finishes discharging, judge whether the next adsorption tower module meets the discharging condition;

[0018] Traverse all adsorption tower modules in the order of number.

[0019] Preferably, the discharging strategy further includes:

[0020] If the current adsorption tower module does not meet the discharging condition, judge whether the next adsorption tower module meets the discharging condition.

[0021] Preferably, judging whether the parallel lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy includes:

[0022] After the Nth adsorption tower module finishes discharging, judge the input situation of all adsorption tower modules;

[0023] If the adsorption tower modules after the N + 2nd one are not input and the total number of input adsorption tower modules is not less than N + 1, judge whether the 1st adsorption tower module and the (N + 1)th adsorption tower module both meet the discharging condition;

[0024] If the 1st adsorption tower module and the (N + 1)th adsorption tower module both meet the discharging condition, determine that the 1st adsorption tower module and the (N + 1)th adsorption tower module meet the simultaneous discharging condition.

[0025] Preferably, the method further includes:

[0026] If the 1st adsorption tower module and the (N + 1)th adsorption tower module fail to meet the simultaneous discharging condition, judge whether the (N + 1)th adsorption tower module meets the discharging condition.

[0027] Preferably, judging whether the parallel lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy further includes:

[0028] If the first adsorption tower module and the (N + 1)-th adsorption tower module do not meet the condition of simultaneous discharging, after the discharging of the (N + 1)-th adsorption tower module ends, the input situation of all adsorption tower modules is judged again;

[0029] If none of the adsorption tower modules after the (N + 3)-th adsorption tower module are input and the total number of input adsorption tower modules is not less than N + 1, then judge whether both the first adsorption tower module and the (N + 2)-th adsorption tower module meet the discharging conditions;

[0030] If both the first adsorption tower module and the (N + 2)-th adsorption tower module meet the discharging conditions, it is determined that the first adsorption tower module and the (N + 2)-th adsorption tower module meet the condition of simultaneous discharging;

[0031] Execute a loop until the discharging of the last adsorption tower module ends.

[0032] Preferably, the method further includes:

[0033] Monitor the material level in the air lock hopper;

[0034] 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 discharging conditions;

[0035] 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 condition of stopping discharging.

[0036] Preferably, the adsorption tower module includes: an upper module and a lower module;

[0037] Judging the input situation of the adsorption tower module includes:

[0038] Obtain the input identification of the upper module and the input identification of the lower module of the adsorption tower module;

[0039] If both the input identification of the upper module and the input identification of the lower module of the adsorption tower module are in the input state, it is determined that the adsorption tower module has been input;

[0040] If the input identification of the upper module or the input identification of the lower module of the adsorption tower module is in the non-input state, it is determined that the adsorption tower module is not input.

[0041] Preferably, after the discharging of the current adsorption tower module ends, the method further includes:

[0042] At an interval of a preset time period, judge whether the next adsorption tower module meets the discharging conditions.

[0043] According to the second aspect of the embodiments of the present application, an air lock hopper head and tail simultaneous discharging control system for an adsorption tower module group is provided, including:

[0044] Adsorption tower module group, chain bucket elevator and controller;

[0045] The adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules;

[0046] The adsorption tower module includes: an upper module, a lower module and a gas lock hopper;

[0047] The upper module and the lower module are connected to the feed inlet of the gas lock hopper through pneumatic valves;

[0048] A pneumatic valve is arranged at the discharge outlet of the gas lock hopper;

[0049] The chain bucket elevator is arranged below the adsorption tower module group;

[0050] The controller is used to execute a control method for simultaneous discharging at the head and tail of the gas lock hopper of an adsorption tower module group as described in any one of the above.

[0051] The technical solution provided by this application may include the following beneficial effects:

[0052] The control method for simultaneous discharging at the head and tail of the gas lock hopper of the adsorption tower module group in this application includes: determining the discharging time length of the gas lock hopper and the running speed of the chain bucket elevator, and calculating the running distance of the chain bucket elevator during the discharging process of the gas lock hopper according to the discharging time length of the gas lock hopper and the running speed of the chain bucket elevator; determining the distance between two discharge valves of the gas lock hopper, and calculating the quotient of the running distance of the chain bucket elevator during the discharging process of the gas lock hopper and the distance between two discharge valves of the gas lock hopper as N'; then the number of gas lock hoppers straddled by the chain bucket elevator during the discharging process of the gas lock hopper does not exceed N; where N = N' + 1; determining two gas lock hoppers with a number difference not less than N as a parallel gas lock hopper group that can be simultaneously discharged; executing a preset discharging strategy through the adsorption tower module group, and judging whether the parallel gas lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy; if the simultaneous discharging condition is met, controlling the parallel gas lock hopper group to discharge simultaneously; where the adsorption tower module group includes a plurality of sequentially numbered adsorption tower modules; each adsorption tower module includes a gas lock hopper.

[0053] In this technical solution, it is judged whether there are gas lock hoppers that can be simultaneously discharged through the above logic, and simultaneous discharging through the parallel gas lock hopper group can improve the discharging efficiency, reduce the empty hopper rate, and increase the circulation volume of the entire activated carbon desulfurization and denitrification system.

[0054] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0055] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0056] Figure 1 It is a schematic flow chart of a method for controlling the simultaneous discharging at the head and tail of the air lock hopper of an adsorption tower module group provided by an embodiment of the present application;

[0057] Figure 2 It is a schematic flow chart of a discharging strategy in a method for controlling the simultaneous discharging at the head and tail of the air lock hopper of an adsorption tower module group provided by an embodiment of the present application;

[0058] Figure 3 It is a partial structural schematic diagram of a control system for the simultaneous discharging at the head and tail of the air lock hopper of an adsorption tower module group provided by an embodiment of the present application;

[0059] Figure 4 It is a structural schematic diagram of a control system for the simultaneous discharging at the head and tail of the air lock hopper of an adsorption tower module group provided by an embodiment of the present application. Detailed implementation manners

[0060] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0061] Embodiment 1

[0062] Figure 1 It is a schematic flow chart of a method for controlling the simultaneous discharging at the head and tail of the air lock hopper of an adsorption tower module group provided by an embodiment of the present application. Referring to Figure 1 , a method for controlling the simultaneous discharging at the head and tail of the air lock hopper of an adsorption tower module group includes:

[0063] S11: Determine the discharging time length of the air lock hopper and the running speed of the chain bucket elevator, and calculate the running distance of the chain bucket elevator during the discharging process of the air lock hopper according to the discharging time length of the air lock hopper and the running speed of the chain bucket elevator;

[0064] S12: Determine the distance between the two discharging valves of the air lock hopper, and calculate the quotient of the running distance of the chain bucket elevator during the discharging process of the air lock hopper and the distance between the two discharging valves of the air lock hopper as N′, then the number of air lock hoppers straddled by the chain bucket elevator during the discharging process of the air lock hopper does not exceed N; where N = N′ + 1;

[0065] S13: Determine two air lock hoppers with a number difference of not less than N as a parallel air lock hopper group that can be simultaneously discharged;

[0066] S14: Execute a preset discharging strategy through the adsorption tower module group, and judge whether the parallel air lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy;

[0067] S15: If the simultaneous discharging condition is satisfied, control the parallel lock hopper group to discharge simultaneously.

[0068] Among them, the adsorption tower module group includes multiple adsorption tower modules numbered sequentially; each adsorption tower module includes a lock hopper.

[0069] In specific practice, referring to Figure 3 , the adsorption tower module includes an upper module and a lower module. Pneumatic valves are provided on the pipelines connecting the adsorption tower module and the lock hopper, namely the upper module feed valve and the lower module feed valve. When these valves are opened, the activated carbon in the adsorption tower module flows into the lock hopper with the reciprocating movement of the module discharging rake.

[0070] A pneumatic valve is provided on the pipeline connecting the discharge port of the lock hopper and the bucket elevator, which is called the discharge valve. When the discharge valve is opened, the activated carbon in the lock hopper flows by gravity into the bucket elevator.

[0071] As Figure 4 shown in the simultaneous discharging control system of the lock hoppers at the head and tail of the adsorption tower module group, there are a total of 11 adsorption tower modules, and the 11 module groups are arranged in a row. A lock hopper is provided below each adsorption tower module, and the bottoms of the upper and lower modules are connected to the feed port of the lock hopper through pipelines. The activated carbon in the module is first discharged into the lock hopper, and then discharged into the bucket elevator located at the bottom of the lock hopper through the discharge port of the lock hopper, and is transported to the desorption tower system by the bucket elevator.

[0072] During implementation, the bucket elevator is always running at a constant speed. The bucket elevator is covered with adjacent hoppers, and the hoppers run with the bucket elevator. The running direction is from the first group of modules to the eleventh group of modules. When the discharge valve of the lock hopper is opened, the material in the lock hopper falls into the hopper of the bucket elevator. The hopper filled with material runs forward with the bucket elevator, and the subsequent hoppers continue to receive material. The discharging speed of the lock hopper is adjusted through the manual valve so that when the lock hopper discharges material, each hopper of the bucket elevator can be filled with material without overflowing.

[0073] The states of all the above pneumatic valves and the states of the level switches are all connected to the controller of the control system. The controller can control the opening and closing of all pneumatic valves; the sequential discharging of each module group is realized by programming in the controller, and the simultaneous discharging function is realized.

[0074] Taking Figure 4 as an example, if the starting moment of the lock hopper discharging is t1 and the ending moment is t2, then the discharging time length T of the lock hopper = t2 - t1.

[0075] The operating speed of the bucket elevator is a fixed value designed at the factory of the equipment, which is V m / s. Then, according to the discharging time length of the air lock hopper and the operating speed of the bucket elevator, the operating distance of the bucket elevator during the discharging process of the air lock hopper is calculated as L = V * T (m).

[0076] Let the distance between the discharging valves of two air lock hoppers be L1. Then, the number N′ of L1 equivalent to the operating distance of the bucket elevator during the discharging process of the air lock hopper is N′ = L / L1. Therefore, the number of air lock hoppers that the bucket elevator crosses during the discharging process of the air lock hopper does not exceed N = N′ + 1. It can be concluded that during the discharging process of the air lock hopper of the first group of modules, when the discharging of the air lock hopper ends, the first hopper filled with material runs the farthest to the position below the air lock hopper of the Nth module group. Then it can be concluded that the first air lock hopper and one of the (N + 1)th and subsequent air lock hoppers can discharge materials simultaneously, and there will be no material overflow in the hoppers on the bucket elevator. That is to say, if the difference in the numbers of two air lock hoppers is not less than N, these two air lock hoppers can discharge materials simultaneously. Each project can obtain the above parameters according to the actual situation. Combining with Figure 4 the on-site situation of the example, it is calculated that N = 8, then Figure 4 In the example, the numbers of the parallel air lock hopper groups that can discharge materials simultaneously are: 1 and 9, 1 and 10, 2 and 10; 1 and 11, 2 and 11; 3 and 11.

[0077] It should be noted that the discharging strategy includes:

[0078] S21: Judge whether the current adsorption tower module meets the discharging condition;

[0079] S22: If the current adsorption tower module meets the discharging condition, control the current adsorption tower module to discharge materials;

[0080] S23: When the current adsorption tower module meets the condition to stop discharging, control the current adsorption tower module to stop discharging;

[0081] S24: After the discharging of the current adsorption tower module ends, judge whether the next adsorption tower module meets the discharging condition;

[0082] S25: Traverse all adsorption tower modules in the order of numbers.

[0083] The controller starts the judgment from the No. 1 adsorption tower module. If the lock hopper of the No. 1 adsorption tower module does not meet the discharging condition, it judges whether the next adsorption tower module meets the discharging condition. If the lock hopper of the No. 1 adsorption tower module meets the discharging condition, at this time, the upper module feed valve and the lower module feed valve are closed. After all the feed valves are closed, the lock hopper discharge valve is opened, and the No. 1 adsorption tower module starts to discharge. Until the No. 1 adsorption tower module meets the condition to stop discharging, the control system controls the current adsorption tower module to stop discharging, closes the lock hopper discharge valve, and the discharging of this lock hopper ends. Then 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.

[0084] It should be noted that during the execution of the discharging strategy, judging whether the parallel lock hopper group meets the condition of simultaneous discharging includes:

[0085] After the discharging of the Nth adsorption tower module ends, judge the input situation of all adsorption tower modules;

[0086] If the adsorption tower modules after the N + 2nd one are not put into use and the total number of put-in adsorption tower modules is not less than N + 1, judge whether both the No. 1 adsorption tower module and the (N + 1)th adsorption tower module meet the discharging condition;

[0087] If both the No. 1 adsorption tower module and the (N + 1)th adsorption tower module meet the discharging condition, it is determined that the No. 1 adsorption tower module and the (N + 1)th adsorption tower module meet the condition of simultaneous discharging.

[0088] Furthermore, the method also includes:

[0089] If the No. 1 adsorption tower module and the (N + 1)th adsorption tower module fail to meet the condition of simultaneous discharging, judge whether the (N + 1)th adsorption tower module meets the discharging condition.

[0090] Based on this, during the execution of the discharging strategy, judging whether the parallel lock hopper group meets the condition of simultaneous discharging also includes:

[0091] If the No. 1 adsorption tower module and the (N + 1)th adsorption tower module fail to meet the condition of simultaneous discharging, after the discharging of the (N + 1)th adsorption tower module ends, judge the input situation of all adsorption tower modules again;

[0092] If the adsorption tower modules after the N + 3rd one are not put into use and the total number of put-in adsorption tower modules is not less than N + 1, judge whether both the No. 1 adsorption tower module and the (N + 2)th adsorption tower module meet the discharging condition;

[0093] If both the No. 1 adsorption tower module and the (N + 2)th adsorption tower module meet the discharging condition, it is determined that the No. 1 adsorption tower module and the (N + 2)th adsorption tower module meet the condition of simultaneous discharging;

[0094] Execute the loop until the discharge of the last adsorption tower module is completed.

[0095] Take Figure 4 as an example. When the 8th adsorption tower module finishes execution, check the input status of all adsorption tower modules. If both the 10th and 11th modules are not input and the total number of input modules is not less than 9 (this is the condition for simultaneous head and tail discharge for the first time), then check whether the lock hoppers of the 9th and 1st adsorption tower modules meet the discharge conditions. If both meet the discharge conditions, then the lock hoppers of the 9th and 1st adsorption tower modules can discharge simultaneously to improve the discharge efficiency, reduce the empty hopper rate, and increase the circulation volume of the entire activated carbon desulfurization and denitrification system. After the discharge of the 9th adsorption tower module is completed, it is equivalent to the end of the previous cycle judgment; the judgment of the discharge condition of the 1st adsorption tower module represents the start of the next cycle judgment. If the condition for simultaneous head and tail discharge for the first time is not met, then when the 8th adsorption tower module finishes execution, continue to check one by one whether the lock hoppers of the 9th / 10th / 11th adsorption tower modules meet the discharge conditions until the discharge of the lock hoppers of the last module group is completed, and then start the judgment from the 1st adsorption tower module.

[0096] If the condition for simultaneous head and tail discharge for the first time is not met, when the 9th adsorption tower module is executed in the established order, check the input status of all module groups again. If the 11th adsorption tower module is not input and the total number of input modules is not less than 9 (this is the condition for simultaneous head and tail discharge for the second time), then check whether the lock hoppers of the 10th and 1st module groups meet the discharge conditions. If both meet the discharge conditions, then the lock hoppers of the 10th and 1st adsorption tower modules can discharge simultaneously. After the discharge of the 10th adsorption tower module is completed, it is equivalent to the end of the previous cycle judgment; the judgment of the discharge condition of the 1st adsorption tower module represents the start of the next cycle judgment. If the condition for simultaneous head and tail discharge for the second time is not met, then when the 9th module group finishes execution, continue to check one by one whether the lock hoppers of the 10th / 11th adsorption tower modules meet the discharge conditions until the discharge of the lock hoppers of the last module group is completed, and then start the judgment from the 1st adsorption tower module.

[0097] If the conditions for simultaneous discharging at both the head and the tail for the first and second times are not met, when the 10th adsorption tower module is executed in the established order, the input status of all module groups is judged again. If the total number of input groups is not less than 9 (this is the condition for simultaneous discharging at both the head and the tail for the third time), then it is possible to simultaneously judge whether the air-lock hoppers of the 11th adsorption tower module and the 1st adsorption tower module meet the discharging conditions. If both meet the discharging conditions, then the air-lock hoppers of the 11th adsorption tower module and the 1st adsorption tower module can discharge simultaneously. After the discharging of the 11th adsorption tower module ends, it is equivalent to the end of the previous cycle judgment; the judgment of the discharging condition of the 1st adsorption tower module represents the start of the next cycle judgment. If the condition for simultaneous discharging at both the head and the tail for the third time is not met, then when the execution of the 10th adsorption tower module ends, continue to judge whether the air-lock hopper of the 11th adsorption tower module meets the discharging condition until the air-lock hopper of this group of modules finishes discharging, and then start judging from the 1st adsorption tower module.

[0098] It should be noted that the method further includes:

[0099] Monitoring the material level in the air-lock hopper;

[0100] 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 discharging condition;

[0101] 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 condition for stopping discharging.

[0102] In specific practice, a high material level sensor and a low material level sensor can be set at appropriate positions of the air-lock hopper to detect the material level in the air-lock hopper. When there is a signal from the high material level sensor, 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 material state, and at this time it meets the discharging condition), and it is determined that the current adsorption tower module meets the discharging condition; when there is a signal from the low material level sensor, 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 bin state, and at this time it is necessary to stop discharging), and it is determined that the current adsorption tower module meets the condition for stopping discharging.

[0103] It should be noted that the adsorption tower module includes: an upper module and a lower module;

[0104] Judging the input status of the adsorption tower module includes:

[0105] Obtaining the input identifier of the upper module and the input identifier of the lower module of the adsorption tower module;

[0106] If both the input identifier of the upper module and the input identifier of the lower module of the adsorption tower module are in the input state, it is determined that the adsorption tower module has been input;

[0107] If the input identifier of the upper module or the input identifier of the lower module of the adsorption tower module is in the non-input state, it is determined that the adsorption tower module has not been input.

[0108] In this embodiment, each module is provided with an input status identifier in the control system. Whether each module is in the input or non-input state is determined by the operator according to the actual situation of the equipment. When both the upper module and the lower module of the module group are in the input state, the module group is considered to be in the input state.

[0109] It should be noted that after the current adsorption tower module finishes discharging, the method further includes:

[0110] After an interval of a preset duration, it is judged whether the next adsorption tower module meets the discharging conditions.

[0111] By setting a reasonable interval time, an orderly traversal of the modular adsorption tower can be achieved, forming a scientific discharging scheduling strategy, and overall improving the system operation efficiency and economic benefits. After the current adsorption tower module finishes discharging, 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.), avoiding system fluctuations caused by continuous operation. The interval duration can prevent multiple modules from starting to discharge continuously too closely, reducing possible interference and conflicts between devices, thereby realizing an orderly and synchronous discharging process.

[0112] Embodiment Two

[0113] A control system for simultaneous discharging at the head and tail of the air-lock hopper of an adsorption tower module group, referring to Figure 3 - Figure 4 , includes:

[0114] An adsorption tower module group, a chain bucket elevator, and a controller;

[0115] The adsorption tower module group includes multiple sequentially numbered adsorption tower modules;

[0116] The adsorption tower module includes: an upper module, a lower module, and an air-lock hopper;

[0117] The upper module and the lower module are connected to the feed inlet of the air-lock hopper through pneumatic valves;

[0118] A pneumatic valve is arranged at the discharge outlet of the air-lock hopper;

[0119] The chain bucket elevator is arranged below the adsorption tower module group;

[0120] The controller is used to execute a control method for simultaneous discharging at the head and tail of the air-lock hopper of an adsorption tower module group as in the above embodiment.

[0121] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be seen in the same or similar content in other embodiments.

[0122] It should be noted that in the description of the present application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" refers to at least two.

[0123] Any process or method description shown in the flowchart or described in other ways herein can be understood to represent a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in the reverse order according to the involved functions, rather than in the order shown or discussed. This should be understood by those skilled in the technical field of the embodiments of the present application.

[0124] It should be understood that each part of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above 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, any one or a combination of the following well-known technologies in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0125] Those of ordinary skill in the technical field can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0126] In addition, each functional unit in various embodiments of the present application can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0127] The above-mentioned storage medium can be a read-only memory, a magnetic disk, an optical disk, etc.

[0128] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0129] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A control method for simultaneous discharging at both the head and the tail of the air-lock hopper of an adsorption tower module group, characterized in that, Including: Determine the discharging time length of the air-lock hopper and the running speed of the chain bucket elevator, and calculate the running distance of the chain bucket elevator during the discharging process of the air-lock hopper according to the discharging time length of the air-lock hopper and the running speed of the chain bucket elevator; Determine the distance between two discharging valves of the air-lock hoppers, and calculate the quotient of the running distance of the chain bucket elevator during the discharging process of the air-lock hopper and the distance between the two discharging valves of the air-lock hoppers as N′, then the number of air-lock hoppers straddled by the chain bucket elevator during the discharging process of the air-lock hopper does not exceed N; where N = N′ + 1; Determine two air-lock hoppers with a number difference of not less than N as a parallel air-lock hopper group that can be discharged simultaneously; Execute a preset discharging strategy through the adsorption tower module group, and judge whether the parallel air-lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy; If the simultaneous discharging condition is met, control the parallel air-lock hopper group to discharge simultaneously; Wherein, the adsorption tower module group includes multiple sequentially numbered adsorption tower modules; each adsorption tower module includes an air-lock hopper; The discharging strategy includes: Judge whether the current adsorption tower module meets the discharging condition; If the current adsorption tower module meets the discharging condition, control the current adsorption tower module to discharge; When the current adsorption tower module meets the condition for stopping discharging, control the current adsorption tower module to stop discharging; After the discharging of the current adsorption tower module is completed, judge whether the next adsorption tower module meets the discharging condition; Traverse all adsorption tower modules in the order of numbers; If the current adsorption tower module does not meet the discharging condition, judge whether the next adsorption tower module meets the discharging condition; Judging whether the parallel air-lock hopper group meets the simultaneous discharging condition during the execution of the discharging strategy includes: After the discharging of the Nth adsorption tower module is completed, judge the input situation of all adsorption tower modules; If the adsorption tower modules after the N + 2nd one are not input and the total number of input adsorption tower modules is not less than N + 1, judge whether the 1st adsorption tower module and the (N + 1)th adsorption tower module both meet the discharging condition; If the 1st adsorption tower module and the (N + 1)th adsorption tower module both meet the discharging condition, determine that the 1st adsorption tower module and the (N + 1)th adsorption tower module meet the simultaneous discharging condition; If the 1st adsorption tower module and the (N + 1)th adsorption tower module fail to meet the simultaneous discharging condition, judge whether the (N + 1)th adsorption tower module meets the discharging condition; If the 1st adsorption tower module and the (N + 1)th adsorption tower module fail to meet the simultaneous discharging condition, after the discharging of the (N + 1)th adsorption tower module is completed, judge the input situation of all adsorption tower modules again; If the adsorption tower modules after the N + 3rd one are not input and the total number of input adsorption tower modules is not less than N + 1, judge whether the 1st adsorption tower module and the (N + 2)th adsorption tower module both meet the discharging condition; If the 1st adsorption tower module and the (N + 2)th adsorption tower module both meet the discharging condition, determine that the 1st adsorption tower module and the (N + 2)th adsorption tower module meet the simultaneous discharging condition; Execute the loop until the discharging of the last adsorption tower module is completed.

2. The method according to claim 1, wherein The method further includes: Monitor the material level situation in the air-lock hopper; If the material level in the air-lock hopper is higher than the preset high material level, determine that the current adsorption tower module meets the discharging condition; 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 condition for stopping discharging.

3. The method according to claim 1, characterized in that The adsorption tower module includes: an upper module and a lower module; Judging the input situation of the adsorption tower module includes: Obtaining the input identifier of the upper module and the input identifier of the lower module of the adsorption tower module; If both the input identifier of the upper module and the input identifier of the lower module of the adsorption tower module are in the input state, it is determined that the adsorption tower module has been input; If the input identifier of the upper module or the input identifier of the lower module of the adsorption tower module is in the non-input state, it is determined that the adsorption tower module is not input.

4. The method according to claim 1, wherein After the discharging of the current adsorption tower module is completed, the method further includes: After an interval of a preset duration, judging whether the next adsorption tower module meets the discharging condition.

5. A control system for simultaneous discharging at both the head and the tail of the air-lock hopper of an adsorption tower module group, characterized in that, Including: An adsorption tower module group, a chain bucket elevator and a 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 an air lock hopper; The upper module and the lower module are connected to the feed inlet of the air lock hopper through pneumatic valves; A pneumatic valve is arranged at the discharge outlet of the air lock hopper; The chain bucket elevator is arranged below the adsorption tower module group; The controller is used to execute a method for controlling the simultaneous discharging of the heads and tails of the air lock hoppers of an adsorption tower module group according to any one of claims 1-4.

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