Intelligent sorting PLC system for ash conveying unit

Abstract

The present invention discloses an intelligent sorting PLC system for the ash conveying unit, which includes three levels: T1, T2, and T3. The T1 level includes the first and second electric fields of the electrostatic precipitator, on the A and B sides. The internal "ash conveying" priority order is: (1) the A side of the first electric field; (2) the B side of the first electric field; (3) the A side of the second electric field; (4) the B side of the second electric field. The T2 level includes the economizer, and the internal "ash conveying" priority order is: (1) Unit B of silo pumps No. 3 and 4; (2) Unit C of silo pumps No. 5 and 6; (3) Unit A of silo pumps No. 1 and 2; (4) Unit D of silo pumps No. 7 and 8. The T3 level includes the third, fourth, and fifth electric fields of the electrostatic precipitator, on the A and B sides. The internal "ash conveying" priority order is as follows. The present invention relates to the technical field of PLC program control, which greatly reduces the consumption of compressed air and can save one air compressor. Since the power of each air compressor is above several hundred kilowatts, the energy-saving effect is remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of PLC program control, and relates to an intelligent sorting of each unit for ash transportation in a thermal power plant, specifically an intelligent sorting PLC system for ash transportation units. Background Art

[0002] The ash transportation system of a thermal power plant can be divided into the following parts according to the distribution of ash transportation pipelines: the first and second electric field on the A side of the electrostatic precipitator; the first and second electric field on the B side of the electrostatic precipitator; the third to fifth electric field on the A side of the electrostatic precipitator; the third to fifth electric field on the B side of the electrostatic precipitator; economizer dust removal. There is no sorting and interlock logic between these several major parts in the existing PLC program of the ash transportation control system, and the ash transportation process can be carried out simultaneously, resulting in a significant increase in the consumption of compressed air, which not only wastes energy, but also has a poor ash transportation effect and is inconvenient to use. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides an intelligent sorting PLC system for ash transportation units, which solves the problem of inconvenient use of existing devices.

[0004] To achieve the above object, the present invention is realized through the following technical solutions: The intelligent sorting PLC system for ash transportation units includes three levels of T1, T2, and T3. The T1 level includes the first and second electric fields on the A and B sides of the electrostatic precipitator. The internal "ash transportation" priority order is: (1) the A side of the first electric field; (2) the B side of the first electric field; (3) the A side of the second electric field; (4) the B side of the second electric field. The T2 level includes the economizer. The internal "ash transportation" priority order is: (1) Unit B of bin pumps 3 and 4; (2) Unit C of bin pumps 5 and 6; (3) Unit A of bin pumps 1 and 2; (4) Unit D of bin pumps 7 and 8. The T3 includes the third, fourth, and fifth electric fields on the A and B sides of the electrostatic precipitator. The internal "ash transportation" priority order is: (1) the A side of the third electric field; (2) the B side of the third electric field; (3) the A side of the fourth electric field; (4) the B side of the fourth electric field; (5) the A side of the fifth electric field; (6) the B side of the fifth electric field. The total sorting is: (1) the A side of the first electric field; (2) the B side of the first electric field; (3) the A side of the second electric field; (4) the B side of the second electric field; (5) Economizer Unit B; (6) Economizer Unit C; (7) Economizer Unit A; (8) Economizer Unit D; (9) the A side of the third electric field; (10) the B side of the third electric field; (11) the A side of the fourth electric field; (12) the B side of the fourth electric field; (13) the A side of the fifth electric field; (14) the B side of the fifth electric field.

[0005] Preferably, only one unit can be in the "ash transportation" state at the same time: Use the sorting reset signal of the T1 level , the sorting reset signal of the T2 level , the sorting reset signal of the T3 level in series for interlocking. Each level of sorting reset signal is sent out in series by the sorting instruction signals of each unit at this level.

[0006] Preferably, the sorting instruction trigger signal is sent out in parallel by the high material level signal of the bin pump in this unit and the signal indicating that the feeding time in this unit has reached. The high material level signal of the bin pump in this unit is sent out by summarizing in parallel the high material level signals of each bin pump in this unit.

[0007] Preferably, the self-locking of the sorting instruction is completed by the sorting instructions of their respective units.

[0008] Preferably, the unlocking of the sorting instruction is completed by the purging completion instruction of this unit or the reset instruction of this unit.

[0009] Preferably, the queue order is interlocked from top to bottom: n represents the queue serial number of the sorting unit, and n ranges from 1 to 14. The sorting instruction of this unit is interlocked by the high material level signals of all the units before the sorting of this unit. That is, as long as one of the units with a queue serial number less than this unit is at a high material level, the sorting instruction of this unit will not be sent out.

[0010] Beneficial effects

[0011] The present invention provides an intelligent sorting PLC system for ash conveying units, which has the following beneficial effects: The present invention solves the problem of the disordered parallel ash conveying state of each unit in the previous ash removal. According to the ash falling amount and ash falling speed of each unit, it automatically sorts, and only one unit is in the ash conveying state in each time period, greatly reducing the consumption of compressed air. One air compressor can be saved. Since the power of each air compressor is above several hundred kilowatts, the energy-saving effect is remarkable, which brings convenience to people's use. Description of the drawings

[0012] Figure 1 It is a program segment taking two units, namely the first electric field on the A side and the first electric field on the B side of the electrostatic precipitator of the present invention as examples.

[0013] Figure 2 It is a general logic program segment of the present invention. Detailed implementation manners

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0015] Please refer to Figure 1-2, the present invention provides a technical solution: an intelligent sorting PLC system for the ash conveying unit, including three levels of T1, T2 and T3. The T1 level includes the first and second electric fields of the electrostatic precipitator, on the A and B sides. The internal "ash conveying" priority order is: (1) the A side of the first electric field; (2) the B side of the first electric field; (3) the A side of the second electric field; (4) the B side of the second electric field. The T2 level includes the economizer, and the internal "ash conveying" priority order is: (1) the B unit of the 3rd and 4th bin pumps; (2) the C unit of the 5th and 6th bin pumps; (3) the A unit of the 1st and 2nd bin pumps; (4) the D unit of the 7th and 8th bin pumps. The T3 includes the third, fourth, and fifth electric fields of the electrostatic precipitator, on the A and B sides. The internal "ash conveying" priority order is: (1) the A side of the third electric field; (2) the B side of the third electric field; (3) the A side of the fourth electric field; (4) the B side of the fourth electric field; (5) the A side of the fifth electric field; (6) the B side of the fifth electric field. The total sorting: (1) the A side of the first electric field; (2) the B side of the first electric field; (3) the A side of the second electric field; (4) the B side of the second electric field; (5) the B unit of the economizer; (6) the C unit of the economizer; (7) the A unit of the economizer; (8) the D unit of the economizer; (9) the A side of the third electric field; (10) the B side of the third electric field; (11) the A side of the fourth electric field; (12) the B side of the fourth electric field; (13) the A side of the fifth electric field; (14) the B side of the fifth electric field. Only one unit can be in the "ash conveying" state at the same time: using the T1-level sorting reset signal , the T2-level sorting reset signal , the T3-level sorting reset signal are connected in series for interlocking. Each level of sorting reset signal is sent out in series by the sorting instruction signals of each unit at this level. The sorting instruction trigger signal is sent out in parallel by the high material level signal of the bin pump in this unit and the signal that the feeding time in this unit arrives. The high material level signal of the bin pump in this unit is sent out by summarizing in parallel the high material level signals of each bin pump in this unit. The sorting instruction maintains self-locking by the respective unit sorting instructions. The sorting instruction is unlocked by the purging completion instruction or the reset instruction of this unit. The queuing order is interlocked from top to bottom: n represents the queuing serial number of the sorting unit, and n ranges from 1 to 14. The sorting instruction of this unit is interlocked by the high material level signals of all units before the sorting of this unit. That is, as long as one of the units with a queuing serial number smaller than this unit is at a high material level, the sorting instruction of this unit will not be sent out.

[0016] Through those skilled in the art, the components in this case are connected in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process.

[0017] Embodiment: Only one unit can be in the "ash conveying" state at the same time:

[0018] Using the T1-level sorting reset signal , the T2-level sorting reset signal , the T3-level sorting reset signal Interlock is carried out in series. The sorting reset signal of each level is sent out in series by the sorting instruction signals of each unit at this level. See Networks 5, 6, and 7 in the attached drawings for details.

[0019] Sorting instruction trigger signal:

[0020] The sorting instruction trigger signal is sent out in parallel by the high material level signal of the bin pump in this unit and the signal indicating that the feeding time in this unit has reached. For example, in Network 1 、 ; in Network 3 、 ; in Network 8 、 . The high material level signal of the bin pump in this unit is sent out by aggregating in parallel the high material level signals of each bin pump in this unit. For example, in Networks 2, 4, and 9.

[0021] Sorting instruction self-locking:

[0022] The sorting instruction is held (self-locked) by the sorting instruction of each respective unit. For example, in Network 1 ; in Network 3 ; in Network 8 .

[0023] Sorting instruction unlocking:

[0024] The sorting instruction is unlocked by the purging completion instruction of this unit or the reset instruction of this unit. For example, in Network 1 、 ; in Network 3 、 ; in Network 8 、 , which is convenient to use.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Intelligent sorting PLC system for ash conveying unit, Characterized in that, It includes three levels of T1, T2 and T3. The T1 level includes the first and second electric fields of the electrostatic precipitator, on the A and B sides. The internal "ash conveying" priority order is: (1) A side of the first electric field; (2) B side of the first electric field; (3) A side of the second electric field; (4) B side of the second electric field. The T2 level includes the economizer. The internal "ash conveying" priority order is: (1) B unit of bin pumps No. 3 and 4; (2) C unit of bin pumps No. 5 and 6; (3) A unit of bin pumps No. 1 and 2; (4) D unit of bin pumps No. 7 and 8. The T3 includes the third, fourth and fifth electric fields of the electrostatic precipitator, on the A and B sides. The internal "ash conveying" priority order is: (1) A side of the third electric field; (2) B side of the third electric field; (3) A side of the fourth electric field; (4) B side of the fourth electric field; (5) A side of the fifth electric field; (6) B side of the fifth electric field. The total sorting order is: (1) A side of the first electric field; (2) B side of the first electric field; (3) A side of the second electric field; (4) B side of the second electric field; (5) B unit of the economizer; (6) C unit of the economizer; (7) A unit of the economizer; (8) D unit of the economizer; (9) A side of the third electric field; (10) B side of the third electric field; (11) A side of the fourth electric field; (12) B side of the fourth electric field; (13) A side of the fifth electric field; (14) B side of the fifth electric field; Only one unit can be in the "ash conveying" state at the same time: using the T1-level sorting reset signal , the T2-level sorting reset signal , the T3-level sorting reset signal are connected in series for interlocking, and each level of sorting reset signal is sent out in series by the sorting instruction signals of each unit at this level; The sorting instruction maintains self-locking and is completed by the sorting instructions of respective units; The queuing order is interlocked from top to bottom: n represents the queuing serial number of the sorting unit, and n ranges from 1 to 14. The sorting instruction of this unit is interlocked by the high material level signals of all units before the sorting of this unit. That is, as long as there is one unit with a high material level among all units with a queuing serial number smaller than this unit, the sorting instruction of this unit will not be issued.

2. The intelligent sorting PLC system for ash conveying unit according to claim 1, Characterized in that, The triggering signal of the sorting instruction is issued in parallel by the high material level signal of the bin pump of this unit and the signal that the feeding time of this unit arrives. The high material level signal of the bin pump of this unit is issued by summarizing in parallel the high material level signals of each bin pump of this unit.

3. The intelligent sorting PLC system for ash conveying unit according to claim 1, Characterized in that, The unlocking of the sorting instruction is completed by the purging completion instruction of this unit or the reset instruction of this unit.

Images