Balance control system for material distribution section of single desorption tower and double desorption units

Abstract

The invention relates to a single-desorption-tower double-desorption-unit material distribution section balance control system, which is applied to the technical field of activated carbon desulfurization and denitrification, and is characterized in that a surge bin is arranged above a desorption tower, material level detectors are arranged in the material distribution sections of two desorption units and are electrically connected with a controller, and the high and low material levels of activated carbon in the material distribution sections are preset; when the material level is low, the double-rotation sealing valve at the top of the material distribution section is opened, the material is supplemented for the material distribution section through the surge bin, and when the material level is high, the double-rotation sealing valve at the top of the material distribution section is closed, so that the material height of the material distribution sections of the two analysis units is always kept within a preset range, and the material levels of the material distribution sections of the two analysis units are basically balanced; the material shortage condition of the material distribution section is avoided; and the condition that one material distribution section is full of materials and the other material distribution section is lack of materials is avoided, and corrosive steam is avoided, so that the desorption tower body and equipment are protected, the service life of the equipment is prolonged, and the desorption efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of activated carbon desulfurization and denitrification, and in particular to a material distribution section balance control system for a single-analysis tower and double-analysis units. Background Art

[0002] In the activated carbon desulfurization and denitrification process, the activated carbon is in contact with the flue gas through the adsorption tower to reach saturation, and the saturated activated carbon is transported to the top of the desorption tower through the material conveying system with the chain bucket conveyor as the main equipment; in order to save floor space and equipment investment, a desorption tower usually includes two desorption units. The unit structure is from top to bottom as the distribution section, heating section, degassing section, cooling section, and unloading section. The activated carbon flows from the distribution section from top to bottom, is heated in the heating section to complete thermal desorption, is degassed in the degassing section, cooled in the cooling section, and is discharged from the unloading section to the outside of the desorption tower, and is sent to the adsorption tower for recycling by the material conveying system.

[0003] Due to the properties of mechanical equipment, equipment layout, material circulation and other reasons, the material level heights of the distribution sections of the two analysis units of the same analysis tower are often inconsistent, and even have large deviations. It is possible that one distribution section is full of material while the other is short of material. The two analysis units are provided with heat source by the same hot air furnace to parse the activated carbon, and the heat sources received by the two analysis units are basically the same. If the material level deviation of the distribution sections of the two analysis units is large, the analysis unit with short of material in the distribution section will have excess heat, resulting in a large amount of acid steam coming out of the upper part of the distribution section, which will seriously corrode the tower body and equipment. This not only reduces the service life of the analysis tower, but also reduces the analysis efficiency. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a single-analyzer tower and double-analyzer unit distribution section balance control system to solve the problem in the prior art that a large amount of acidic steam corrodes the tower body and equipment due to the large difference in material level heights of the two analysis units of the analysis tower, thereby reducing the service life of the analysis tower and the analysis efficiency.

[0005] In order to solve the above problems, the present application provides a single-analyzer tower and double-analyzer unit material distribution section balance control system, the system comprising: An analysis tower and a buffer bin arranged on the top of the analysis tower; The desorption tower comprises two desorption units arranged in parallel, each of which comprises a material distribution section, a heating section, a degassing section, a cooling section and a discharging section from top to bottom; A buffer bin is provided on the top of the material distribution section, and the buffer bin is connected to the inlets of the material distribution sections of the two analysis units through two double rotary sealing valves respectively; A material level detector is provided inside the material distribution section, and the material level detector inside the material distribution section is electrically connected to the controller; The controller is also electrically connected to the two double rotary sealing valves, and is used to control the opening or closing of the corresponding double rotary sealing valves according to the detection data of the material level detector inside the material distribution section, so that the activated carbon inside the material distribution section is kept within a preset range; A discharge mechanism is provided on the top of the buffer bin, and the discharge mechanism is used to place the activated carbon on the hopper moved into place into the buffer bin; The chain bucket machine and the unloading mechanism are electrically connected to the controller respectively. The controller is used to control the motor of the chain bucket machine, thereby driving the hopper to circulate between the multiple analytical towers. The controller is also used to control the unloading mechanism to place the activated carbon on the hopper into the buffer bin after the hopper moves to the unloading position of any analytical tower. The controller is also used to control the double rotary sealing valve to open when the unloading mechanism unloads the buffer bin, so as to discharge the activated carbon in the buffer bin into the distribution section. The controller controls the corresponding double rotary sealing valve to close when the preset high material level is reached according to the detection data of the material level detector in the corresponding distribution section; The controller is also used to control the corresponding double rotary sealing valve to open according to the detection data of the material level detector in the corresponding distribution section, when the preset low material level is reached, so as to lower the activated carbon in the buffer bin into the corresponding distribution section until the height of the activated carbon in the distribution section reaches the preset high material level, and the controller controls the corresponding double rotary sealing valve to close.

[0006] Preferably, A buffer bin high material level detector is provided in the buffer bin, and the buffer bin high material level detector is electrically connected to the controller; When the hopper moves to any unloading position of the analysis tower, the controller controls the unloading mechanism to drop the activated carbon on the hopper into the buffer bin. When the controller detects a high level signal sent by the buffer bin high level detector in the buffer bin, the controller controls the corresponding unloading mechanism to close.

[0007] Preferably, When the controller receives a high material level signal sent by the buffer bin high material level detector in the buffer bin, the controller controls the motor of the chain bucket conveyor to move the bucket on the track to the unloading position of the next analysis tower to refill the buffer bin of the next analysis tower.

[0008] Preferably, The feeding speed of the buffer bin of the unloading mechanism is greater than the unloading speed of the buffer bin for the corresponding material distribution section through the double rotary sealing valve.

[0009] Preferably, The material level detectors arranged inside the material distribution section include: a material distribution section low material level detector and a material distribution section high material level detector; The material distribution section low material level detector and the material distribution section high material level detector are electrically connected to the controller respectively; When the hopper moves to the unloading position of any analysis tower, the controller controls the unloading mechanism to lower the activated carbon on the hopper into the buffer bin, and the controller synchronously controls the double rotary sealing valve corresponding to the analysis tower to open, and lowers the activated carbon in the buffer bin into the distribution section. When the controller receives a high level signal sent by the high level detector of the distribution section, the controller controls the corresponding double rotary sealing valve to close.

[0010] Preferably, The controller is also used to control the corresponding double rotary sealing valve to open when receiving a low material level signal sent by the low material level detector of the material distribution section, and unload material to the material distribution section through the buffer bin, until the controller receives a high material level signal sent by the high material level detector of the material distribution section, and the controller controls the corresponding double rotary sealing valve to close.

[0011] Preferably, A discharging rake is provided at the bottom of the discharging section, and the discharging rake is electrically connected to the controller, and the controller is used to control the opening or closing of the discharging rake; The unloading rake is used to transport the activated carbon in the analysis unit.

[0012] Preferably, A buffer bin low material level detector is also provided in the buffer bin, and the buffer bin low material level detector is electrically connected to the controller; When the controller receives a low material level signal sent by the low material level detector of the material distribution section and the low material level detector of the buffer bin sends a low material level signal, the controller controls the unloading rake to close.

[0013] The technical solution provided by the embodiments of the present invention may have the following beneficial effects: The present application arranges a buffer bin above the analysis tower, arranges a material level detector in the distribution sections of the two analysis units and electrically connects them to a controller, and presets the high and low material levels of the activated carbon in the distribution section. When the material level is low, the double rotary sealing valve at the top of the distribution section is opened to replenish the material for the distribution section through the buffer bin, and when the material level is high, the double rotary sealing valve at the top of the distribution section is closed, so that the material height of the distribution sections of the two analysis units is always maintained within a preset range, thereby making the material levels of the distribution sections of the two analysis units basically balanced, avoiding the situation where the distribution sections are short of material; it also avoids the situation where one distribution section is full of material while the other is short of material, avoiding the generation of corrosive steam, thereby protecting the analysis tower body and equipment, extending the service life of the equipment, and improving the analysis efficiency.

[0014] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] Figure 1 is a system schematic diagram of a material distribution section balance control system with a single analytical tower and double analytical units according to an exemplary embodiment; Figure 2 is a schematic diagram of the overall structure of a material distribution section balance control system with a single analytical tower and double analytical units according to another exemplary embodiment; In the attached drawings: 1-controller, 2-double rotary sealing valve, 3-buffer bin high material level detector, 4-buffer bin low material level detector, 5-distributing section high material level detector, 6-distributing section low material level detector, 7-discharging mechanism, 8-chain bucket machine, 9-discharging rake. DETAILED DESCRIPTION

[0017] 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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0018] Embodiment 1 Figure 1 is a system schematic diagram of a single-analyzer tower and double-analyzer unit material distribution section balance control system according to an exemplary embodiment. Figure 1 As shown, the system includes: An analysis tower and a buffer bin arranged on the top of the analysis tower; The desorption tower comprises two desorption units arranged in parallel, each of which comprises a material distribution section, a heating section, a degassing section, a cooling section and a discharging section from top to bottom; A buffer bin is provided on the top of the material distribution section, and the buffer bin is connected to the inlets of the material distribution sections of the two analysis units through two double rotary sealing valves 2 respectively; A material level detector is provided inside the material distribution section, and the material level detector inside the material distribution section is electrically connected to the controller 1; The controller 1 is also electrically connected to the two double rotary sealing valves 2, and is used to control the opening or closing of the corresponding double rotary sealing valves 2 according to the detection data of the material level detector inside the material distribution section, so that the activated carbon inside the material distribution section is kept within a preset range; A discharge mechanism 7 is provided on the top of the buffer bin, and the discharge mechanism 7 is used to discharge the activated carbon on the hopper moved into place into the buffer bin; The chain bucket machine 8 and the unloading mechanism 7 are electrically connected to the controller 1 respectively. The controller 1 is used to control the motor of the chain bucket machine 8 so that the hopper on the track moves cyclically between multiple decomposition towers. The controller 1 is also used to control the unloading mechanism 7 to place the activated carbon on the hopper into the buffer bin after the hopper moves to the unloading position of any decomposition tower. The controller 1 is also used to control the double rotary sealing valve 2 to open when the discharge mechanism 7 discharges the material from the buffer bin, so as to discharge the activated carbon in the buffer bin into the distribution section. The controller 1 controls the corresponding double rotary sealing valve 2 to close when the preset high material level is reached according to the detection data of the material level detector in the corresponding distribution section. The controller 1 is also used to control the corresponding double rotary sealing valve 2 to open when the preset low material level is reached according to the detection data of the material level detector in the corresponding material distribution section, so as to lower the activated carbon in the buffer bin into the corresponding material distribution section until the height of the activated carbon in the material distribution section reaches the preset high material level, and the controller 1 controls the corresponding double rotary sealing valve 2 to close; A buffer bin high material level detector 3 is provided in the buffer bin, and the buffer bin high material level detector 3 is electrically connected to the controller 1; The material level detectors arranged inside the material distribution section include: a material distribution section low material level detector 6 and a material distribution section high material level detector 5; the material distribution section low material level detector 6 and the material distribution section high material level detector 5 are electrically connected to the controller 1 respectively; A discharging rake 9 is provided at the bottom of the discharging section, and the discharging rake 9 is electrically connected to the controller 1; A buffer bin low material level detector 4 is also provided in the buffer bin, and the buffer bin low material level detector 4 is electrically connected to the controller 1; It is understandable that if Figure 2As shown, at the hopper parking position above the feed port of each analytical tower, a discharge mechanism 7 is arranged, which drives the chain bucket on the track to move to the discharge position by driving the chain bucket machine 8, and then the activated carbon on the hopper is lowered into the buffer bin through the discharge mechanism 7; two double rotary sealing valves 2 are arranged to connect the buffer bin and the distribution section of the analytical tower, and the two double rotary sealing valves 2 feed the distribution sections of the two analytical units respectively, and a buffer bin high material level detector 3 and a buffer bin low material level detector 4 are respectively arranged in the buffer bin, and a distribution section high material level detector 5 and a distribution section low material level detector 6 are respectively arranged in the distribution sections of the two analytical units; the chain bucket machine 8 drives the hopper under the control of the controller 1. It moves cyclically among multiple analysis towers, and stops at a fixed position of the analysis tower, that is, the unloading position, each time. When the hopper moves to the unloading position of any analysis tower, if the buffer bin high material level detector 3 in the buffer bin of the analysis tower has no high material level signal, it indicates that the buffer bin is not full and needs to be replenished. Then the controller 1 opens the unloading mechanism 7 to feed the buffer bin of the analysis tower. When the controller receives the buffer bin high material level signal, the feeding ends. The high material level signal indicates that the buffer bin is full. At this time, the unloading mechanism 7 is closed. If the buffer bin of the analysis tower that is to be fed has a high material level signal, the buffer bin of the analysis tower will not be fed. The controller 1 controls the chain bucket machine 8 to drive the hopper on the track to move to the next analysis tower. When the buffer bin is feeding, the controller 1 opens the double rotary sealing valve 2 synchronously, and the material in the buffer bin is gradually lowered into the material distribution section, and the material in the material distribution section gradually rises. When the controller 1 receives the high material level signal sent by the high material level detector 5 of the material distribution section, the controller 1 controls the corresponding double rotary sealing valve 2 to close, and stops the buffer bin from continuing to discharge material to the corresponding material distribution section; It is worth emphasizing that the discharge mechanism 7 feeds into the buffer bin synchronously with the buffer bin feeding into the material distribution section. However, since the feeding speed of the discharge mechanism 7 into the buffer bin is greater than the feeding speed of the buffer bin into the material distribution section, the material height in the buffer bin will still gradually rise until the buffer bin high material level detector 3 sends a signal to the controller 1. The controller closes the discharge mechanism 7 and controls the chain bucket machine 8 to drive the bucket on the track to move to the next analytical tower. Since there are multiple analytical towers, it takes a certain amount of time for the hopper to circulate to the same analytical tower. After the hopper is removed, due to the continuous movement of the unloading rake 9, the height of the activated carbon in the distribution section will gradually move down. When it drops to the preset height, that is, when the controller 1 receives the low material level signal sent by the low material level detector 6 of the distribution section, the controller 1 opens the corresponding double rotary sealing valve 2, and distributes the material to the corresponding distribution section through the buffer bin, and continues to replenish until the controller 1 receives the high material level signal sent by the high material level detector 5 of the distribution section. The controller 1 controls the corresponding double rotary sealing valve 2 to close, and repeats this process to keep the material height of the distribution section always between the low material level and the high material level; that is, when the hopper is at the unloading position, the buffer bin is replenished with material through the unloading mechanism 7, and the buffer bin is distributed to the distribution section. When the hopper is removed, the remaining material in the buffer bin is used to distribute the material to the distribution section. Generally speaking, when the buffer bin is at a high material level, a single distribution section can be replenished from a low material level to a high material level 5-10 times; It is worth mentioning that if there are a large number of analysis towers, the single cycle time of the hopper will be longer. If there is no remaining material in the buffer bin after several unloadings, that is, the controller 1 receives the low material level signal sent by the buffer bin low material level detector 4, and at the same time the controller 1 receives the low material level signal sent by the distribution section low material level detector 6, that is, the distribution section needs to be replenished with materials at this time, but there is no remaining material to be replenished in the buffer bin, and the hopper has not yet circulated. If the unloading rake 9 continues to run, the material in the distribution section will drop below the low material level. At this time, the controller 1 needs to control the unloading rake 9 to close, that is, the analysis unit corresponding to the distribution section stops running, to avoid further decline of the material in the distribution section, thereby avoiding the generation of corrosive steam, and then protecting the analysis tower body and auxiliary equipment, until the hopper moves to the unloading position of the analysis tower again, the buffer bin is replenished through the unloading structure 7, and the buffer bin replenishes the distribution section, and the controller 1 will start the unloading rake 9.

[0019] 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.

[0020] It should be noted that, in the description of the present invention, 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 the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0021] 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 invention 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 those skilled in the art to which the embodiments of the present invention belong.

[0022] It should be understood that the various parts of the present invention 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.

[0023] 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.

[0024] In addition, each functional unit in each embodiment of the present invention 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.

[0025] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", 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 invention. 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.

[0027] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A single-analyzer tower and double-analyzer unit distribution section balance control system, characterized in that: The system comprises: An analysis tower and a buffer bin arranged on the top of the analysis tower; The desorption tower comprises two desorption units arranged in parallel, each of which comprises a material distribution section, a heating section, a degassing section, a cooling section and a discharging section from top to bottom; A buffer bin is provided on the top of the material distribution section, and the buffer bin is connected to the inlets of the material distribution sections of the two analysis units through two double rotary sealing valves respectively; A material level detector is provided inside the material distribution section, and the material level detector inside the material distribution section is electrically connected to the controller; The controller is also electrically connected to the two double rotary sealing valves, and is used to control the opening or closing of the corresponding double rotary sealing valves according to the detection data of the material level detector inside the material distribution section, so that the activated carbon inside the material distribution section is kept within a preset range; A discharge mechanism is provided on the top of the buffer bin, and the discharge mechanism is used to place the activated carbon on the hopper moved into place into the buffer bin; The chain bucket machine and the unloading mechanism are electrically connected to the controller respectively. The controller is used to control the motor of the chain bucket machine, thereby driving the hopper to circulate between the multiple analytical towers. The controller is also used to control the unloading mechanism to place the activated carbon on the hopper into the buffer bin after the hopper moves to the unloading position of any analytical tower. The controller is also used to control the double rotary sealing valve to open when the unloading mechanism unloads the buffer bin, so as to discharge the activated carbon in the buffer bin into the distribution section. The controller controls the corresponding double rotary sealing valve to close when the preset high material level is reached according to the detection data of the material level detector in the corresponding distribution section; The controller is also used to control the corresponding double rotary sealing valve to open according to the detection data of the material level detector in the corresponding distribution section, when the preset low material level is reached, so as to lower the activated carbon in the buffer bin into the corresponding distribution section until the height of the activated carbon in the distribution section reaches the preset high material level, and the controller controls the corresponding double rotary sealing valve to close.

2. The system according to claim 1, characterized in that A buffer bin high material level detector is provided in the buffer bin, and the buffer bin high material level detector is electrically connected to the controller; When the hopper moves to any unloading position of the analysis tower, the controller controls the unloading mechanism to drop the activated carbon on the hopper into the buffer bin. When the controller detects a high level signal sent by the buffer bin high level detector in the buffer bin, the controller controls the corresponding unloading mechanism to close.

3. The system according to claim 2, characterized in that When the controller receives a high material level signal sent by the buffer bin high material level detector in the buffer bin, the controller controls the motor of the chain bucket conveyor to move the bucket on the track to the unloading position of the next analysis tower to refill the buffer bin of the next analysis tower.

4. The system according to claim 3, characterized in that The feeding speed of the buffer bin of the unloading mechanism is greater than the unloading speed of the buffer bin for the corresponding material distribution section through the double rotary sealing valve.

5. The system according to claim 4, characterized in that The material level detectors arranged inside the material distribution section include: a material distribution section low material level detector and a material distribution section high material level detector; The material distribution section low material level detector and the material distribution section high material level detector are electrically connected to the controller respectively; When the hopper moves to the unloading position of any analysis tower, the controller controls the unloading mechanism to lower the activated carbon on the hopper into the buffer bin, and the controller synchronously controls the double rotary sealing valve corresponding to the analysis tower to open, and lowers the activated carbon in the buffer bin into the distribution section. When the controller receives a high level signal sent by the high level detector of the distribution section, the controller controls the corresponding double rotary sealing valve to close.

6. The system according to claim 5, characterized in that The controller is also used to control the corresponding double rotary sealing valve to open when receiving a low material level signal sent by the low material level detector of the material distribution section, and unload material to the material distribution section through the buffer bin, until the controller receives a high material level signal sent by the high material level detector of the material distribution section, and the controller controls the corresponding double rotary sealing valve to close.

7. The system according to claim 6, characterized in that A discharging rake is provided at the bottom of the discharging section, and the discharging rake is electrically connected to the controller, and the controller is used to control the opening or closing of the discharging rake; The unloading rake is used to transport the activated carbon in the analysis unit.

8. The system according to claim 7, characterized in that A buffer bin low material level detector is also provided in the buffer bin, and the buffer bin low material level detector is electrically connected to the controller; When the controller receives a low material level signal sent by the low material level detector of the material distribution section and the low material level detector of the buffer bin sends a low material level signal, the controller controls the unloading rake to close.

Images