Electric dust removal vibrating dust removal control method

Abstract

According to the electric dust removal rapping dust removal control method, a plurality of electric dust removers are included, each electric dust remover comprises a plurality of electric fields used for collecting dust, each electric field comprises a rapping device used for rapping and collecting the dust on the electric field, and the method comprises the steps that the dust accumulation situation corresponding to each electric dust remover is obtained, and the electric dust remover needing to be started is determined based on the dust accumulation situation; for the electric dust removers needing to be started, the dust deposition condition ranking of all the electric dust removers is obtained based on the dust deposition conditions; starting from the electric dust remover with the first dust accumulation condition, sequentially starting the electric dust removers at intervals according to the ranking sequence, so that only one electric dust remover is started at each time; and when each electric dust remover is started, starting from the first electric field of the corresponding electric dust remover, the vibrators in the electric fields are sequentially started at intervals, and in the starting process of the vibrators, the vibrated dust on the electric fields is taken away through the air ducts. The vibration control logic is optimized, and the stable, efficient and energy-saving control effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of automatic control, and in particular to an electrostatic precipitator vibration cleaning control method. Background Art

[0002] The application prospect of the machine head dust collector in the metallurgical industry is very broad. With the continuous improvement of environmental awareness, the emission requirements of industrial pollutants are becoming increasingly stringent. As one of the important environmental protection equipment, the machine head dust collector will be widely used in various industries. Especially in the manufacturing industry, metallurgical industry, mining industry and other industries that generate a lot of dust, the demand for machine head dust collector will continue to grow.

[0003] Dust is easily accumulated in the cathode and anode electrodes of the high-voltage electric field, and mechanical vibration is usually used to clean the dust. However, if the vibration time and frequency are too high, it will cause secondary dust, while if it is too low, it will affect the dust removal effect of the electric field. Summary of the invention

[0004] In view of the technical defects and technical drawbacks in the prior art, the embodiment of the present invention provides an electrostatic precipitator vibration cleaning control method that overcomes the above problems or at least partially solves the above problems. The specific scheme is as follows:

[0005] A method for controlling the vibrating and cleaning of an electrostatic precipitator comprises a plurality of electrostatic precipitators, each of which comprises a plurality of electric fields for collecting dust, each of which comprises a rapper for vibrating dust collected on the electric field, the method comprising:

[0006] Obtain the dust accumulation conditions corresponding to each electrostatic precipitator, and determine the electrostatic precipitator that needs to be started based on the dust accumulation conditions;

[0007] For the electrostatic precipitators that need to be started, based on the dust accumulation situation, the dust accumulation situation ranking of each electrostatic precipitator is obtained;

[0008] Starting from the electrostatic precipitator with the highest dust accumulation, the electrostatic precipitators are started in order of ranking, so that only one electrostatic precipitator is started at any time;

[0009] When each electrostatic precipitator is started, starting from the first electric field of the corresponding electrostatic precipitator, the rappers in each electric field are started in sequence and at intervals, and during the rapper starting process, the dust vibrated out of the electric field is taken away through the air duct.

[0010] Furthermore, starting the electrostatic precipitators at intervals in sequence according to the ranking order includes: after one electrostatic precipitator is started and runs completely according to the ranking order, starting the next electrostatic precipitator after waiting for a first preset time, until all the electrostatic precipitators that need to be started have run completely.

[0011] Furthermore, there are two electrostatic precipitators.

[0012] Further, each electric field includes two left and right chambers, and a cathode electrode and an anode electrode are respectively provided on the upper and lower parts of each chamber for collecting dust, and the rapper includes a cathode rapper and an anode rapper, and the cathode electrode is provided with a cathode rapper, and the anode electrode is provided with an anode rapper, and when each electrostatic precipitator is started; starting from the first electric field corresponding to the electrostatic precipitator, the anode rappers in each electric field are started in sequence and at intervals, that is, after the anode rapper of one electric field is started and runs to completion, after an interval of a second preset time, the anode rapper of the next electric field is started, until the anode rappers of all electric fields are started and run to completion;

[0013] For each electric field, the anode rapper of one chamber is started first, and after the anode rapper of one chamber is started and runs, the anode rapper of another chamber is started after a third preset time interval, and after the anode rapper of another chamber is run, it is determined that the anode rapper of the electric field has completed its operation;

[0014] Among them, in each electrostatic precipitator, the anode oscillator in the left chamber of the previous electric field is bound to the cathode oscillator in the right chamber of the next electric field, the anode oscillator in the right chamber of the previous electric field is bound to the cathode oscillator in the left chamber of the next electric field, the anode oscillator in the left chamber of the last electric field is bound to the cathode oscillator in the right chamber of the first electric field, and the anode oscillator in the right chamber of the last electric field is bound to the cathode oscillator in the left chamber of the first electric field. When each anode oscillator starts to operate, the cathode oscillator bound to it is started and operated synchronously.

[0015] Furthermore, each electrostatic precipitator includes four electric fields for collecting dust, namely the first electric field, the second electric field, the third electric field and the fourth electric field; the anode rapper in the left chamber of the first electric field is bound to the cathode rapper in the right chamber of the second electric field, and the anode rapper in the right chamber of the first electric field is bound to the cathode rapper in the left chamber of the second electric field; the anode rapper in the left chamber of the second electric field is bound to the cathode rapper in the right chamber of the third electric field, and the anode rapper in the right chamber of the second electric field is bound to the cathode rapper in the left chamber of the third electric field; the anode rapper in the left chamber of the third electric field is bound to the cathode rapper in the right chamber of the fourth electric field, and the anode rapper in the right chamber of the third electric field is bound to the cathode rapper in the left chamber of the fourth electric field; the anode rapper in the left chamber of the fourth electric field is bound to the cathode rapper in the right chamber of the first electric field, and the anode rapper in the right chamber of the fourth electric field is bound to the cathode rapper in the left chamber of the first electric field.

[0016] Furthermore, each chamber has two cathode rappers, and the two cathode rappers form a redundant configuration.

[0017] Furthermore, the operation time of the rapper decreases successively from the first electric field to the last electric field.

[0018] Furthermore, it also includes a controller, and the electrostatic precipitator, electric field and rapper are all controlled to start and stop by the controller.

[0019] Furthermore, the air duct includes an air inlet, an air outlet, and an ash hopper located between the air inlet and the air outlet for collecting dust vibrated out of the electric field. The air inlet is located on one side of the electric field, the air outlet is located on the other side of the electric field, and the air inlet is connected to the fan through an air inlet pipe.

[0020] Furthermore, the multiple electric fields in each electrostatic precipitator are arranged in sequence, the air inlet is located on one side of the first electric field, and the air outlet is located on the other side of the last electric field.

[0021] The present invention has the following beneficial effects:

[0022] Optimizing the vibration control logic is one of the lowest-cost ways to improve dust removal effects without changing the performance of existing mechanical equipment. The specific optimization method may vary depending on the model and working environment of the electrostatic precipitator. At the same time, the interface for adjusting the interval is retained during the above optimization. The vibration time interval can be adjusted according to the flue gas properties and dust emission requirements. If more frequent vibration is required, the time interval can be shortened; if it is necessary to reduce damage to the filter bag, the time interval can be extended. This is the second time this solution has been used in this project. The first time it ran stably for more than a year. This project has been implemented and has been running well so far. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flow chart of an electrostatic precipitator vibration cleaning control method provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of four electric fields in an electrostatic precipitator provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 As shown, an electrostatic precipitator vibration cleaning control method provided by an embodiment of the present invention includes multiple electrostatic precipitators, each electrostatic precipitator includes multiple electric fields for collecting dust, and each electric field includes a rapper for rapping the dust collected on the electric field. The method includes:

[0027] Obtain the dust accumulation conditions corresponding to each electrostatic precipitator, and determine the electrostatic precipitator that needs to be started based on the dust accumulation conditions;

[0028] For the electrostatic precipitators that need to be started, based on the dust accumulation situation, the dust accumulation situation ranking of each electrostatic precipitator is obtained;

[0029] Starting from the electrostatic precipitator with the highest dust accumulation, the electrostatic precipitators are started in order of ranking, so that only one electrostatic precipitator is started at any time;

[0030] When each electrostatic precipitator is started, starting from the first electric field of the corresponding electrostatic precipitator, the rappers in each electric field are started in sequence and at intervals, and during the rapper starting process, the dust vibrated out of the electric field is taken away through the air duct.

[0031] Preferably, starting the electrostatic precipitators at intervals in order of ranking includes: after one electrostatic precipitator is started and runs completely in order of ranking, starting the next electrostatic precipitator after waiting for a first preset time, until all the electrostatic precipitators that need to be started have run completely.

[0032] In the embodiment of the present invention, there are two electrostatic precipitators, which are started at an interval of 15 to 20 minutes. That is, after the first electrostatic precipitator is completed, wait for 15-20 minutes before starting the second electrostatic precipitator.

[0033] Preferably, each electric field includes two left and right chambers, and each chamber is provided with a cathode electrode and an anode electrode at the top and bottom, respectively, for collecting dust, and the rapper includes a cathode rapper and an anode rapper, and the cathode electrode is provided with a cathode rapper, and the anode electrode is provided with an anode rapper, and when each electrostatic precipitator is started; starting from the first electric field corresponding to the electrostatic precipitator, the anode rappers in each electric field are started in sequence and at intervals, that is, after the anode rapper of one electric field is started and runs to completion, after an interval of a second preset time, the anode rapper of the next electric field is started, until the anode rappers of all electric fields are started and run to completion;

[0034] For each electric field, the anode rapper of one chamber is started first, and after the anode rapper of one chamber is started and runs, the anode rapper of another chamber is started after a third preset time interval, and after the anode rapper of another chamber is run, it is determined that the anode rapper of the electric field has completed its operation;

[0035] Among them, in each electrostatic precipitator, the anode oscillator in the left chamber of the previous electric field is bound to the cathode oscillator in the right chamber of the next electric field, the anode oscillator in the right chamber of the previous electric field is bound to the cathode oscillator in the left chamber of the next electric field, the anode oscillator in the left chamber of the last electric field is bound to the cathode oscillator in the right chamber of the first electric field, and the anode oscillator in the right chamber of the last electric field is bound to the cathode oscillator in the left chamber of the first electric field. When each anode oscillator starts to operate, the cathode oscillator bound to it is started and operated synchronously.

[0036] See also Figure 2 As shown, in the embodiment of the present invention, each electrostatic precipitator includes four electric fields for collecting dust, namely the first electric field, the second electric field, the third electric field and the fourth electric field; the anode rapper in the left chamber of the first electric field is bound to the cathode rapper in the right chamber of the second electric field, and the anode rapper in the right chamber of the first electric field is bound to the cathode rapper in the left chamber of the second electric field; the anode rapper in the left chamber of the second electric field is bound to the cathode rapper in the right chamber of the third electric field, and the anode rapper in the right chamber of the second electric field is bound to the cathode rapper in the left chamber of the third electric field; the anode rapper in the left chamber of the third electric field is bound to the cathode rapper in the right chamber of the fourth electric field, and the anode rapper in the right chamber of the third electric field is bound to the cathode rapper in the left chamber of the fourth electric field; the anode rapper in the left chamber of the fourth electric field is bound to the cathode rapper in the right chamber of the first electric field, and the anode rapper in the right chamber of the fourth electric field is bound to the cathode rapper in the left chamber of the first electric field.

[0037] In the above embodiment, the cathode rapper and the corresponding anode rapper are bound and run simultaneously, so that the left and right chambers are crossed and the electric fields are crossed between the electric fields, thereby achieving a stable, efficient and energy-saving control effect.

[0038] There are two cathode rappers in each chamber, and the two cathode rappers form a redundant configuration. By arranging two cathode rappers, dust accumulation in the chamber can be avoided after a single rapping failure.

[0039] Among them, since there is more dust in the front electric field and less dust in the back electric field, the operation time of the rapper from the first electric field to the last electric field decreases successively, thereby further achieving efficient and energy-saving control effects.

[0040] The present invention optimizes the vibration control logic and is one of the lowest-cost ways to improve the dust removal effect under the premise that the performance of existing mechanical equipment cannot be changed. The specific optimization method may vary depending on the model and working environment of the electrostatic precipitator. At the same time, the interface for adjusting the interval is retained while the above optimization is performed. The vibration time interval can be adjusted according to the flue gas properties and dust emission requirements. If more frequent vibration is required, the time interval can be shortened; if it is necessary to reduce damage to the filter bag, the time interval can be extended. This is the second time this solution has been used in this project. The first time it ran stably for more than one year. This project has been implemented and has been running well so far.

[0041] The current control model can actually be further optimized, including adjusting the vibration time and interval time through the final emission detection feedback.

[0042] Preferably, the present invention further comprises a controller, and the electrostatic precipitator, the electric field and the rapper are all started and stopped by the controller.

[0043] The controller is applied to a total of 48 positive and negative rappers in this embodiment to monitor the on-site status, receive on-site or HMI operation signals, and control the start and stop of the corresponding equipment. The linkage start signal in the previous paragraph is connected to each device according to the corresponding relationship between the positive and negative poles, so that the on-site single action, HMI single action and HMI one-key linkage control of all rappers can be realized to automatically run.

[0044] Preferably, the air duct includes an air inlet, an air outlet, and an ash hopper located between the air inlet and the air outlet for collecting dust vibrated out of the electric field. The air inlet is located on one side of the electric field, the air outlet is located on the other side of the electric field, and the air inlet is connected to the fan through an air inlet pipe.

[0045] Among them, the multiple electric fields in each electrostatic precipitator are arranged in sequence, the air inlet is located on one side of the first electric field, and the air outlet is located on the other side of the last electric field.

[0046] After starting the fan, the dust vibrated off the electric field and the dust on the ash hopper are blown out from the air outlet.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling electric dust removal by vibration and cleaning, characterized in that: The method comprises a plurality of electrostatic precipitators, each of which comprises a plurality of electric fields for collecting dust, each of which comprises a rapper for rapping dust collected on the electric field, and the method comprises: Obtain the dust accumulation conditions corresponding to each electrostatic precipitator, and determine the electrostatic precipitator that needs to be started based on the dust accumulation conditions; For the electrostatic precipitators that need to be started, based on the dust accumulation situation, the dust accumulation situation ranking of each electrostatic precipitator is obtained; Starting from the electrostatic precipitator with the highest dust accumulation, the electrostatic precipitators are started in order of ranking, so that only one electrostatic precipitator is started at any time; When each electrostatic precipitator is started, starting from the first electric field of the corresponding electrostatic precipitator, the rappers in each electric field are started in sequence and at intervals, and during the rapper starting process, the dust vibrated out of the electric field is taken away through the air duct.

2. The electrostatic precipitator vibration cleaning control method according to claim 1 is characterized in that: The method of starting the electrostatic precipitators at intervals in the ranking order includes: after one electrostatic precipitator is started and runs completely in the ranking order, starting the next electrostatic precipitator after waiting for a first preset time, until all the electrostatic precipitators that need to be started have run completely.

3. The electrostatic precipitator vibration cleaning control method according to claim 2 is characterized in that: There are two electrostatic precipitators.

4. The electrostatic precipitator vibration cleaning control method according to claim 1 is characterized in that: Each electric field includes two left and right chambers, and a cathode electrode and an anode electrode are respectively provided at the top and bottom of each chamber for collecting dust, and the rapper includes a cathode rapper and an anode rapper, and the cathode electrode is provided with a cathode rapper, and the anode electrode is provided with an anode rapper. When each electrostatic precipitator is started; starting from the first electric field corresponding to the electrostatic precipitator, the anode rappers in each electric field are started in sequence and at intervals, that is, after the anode rapper of one electric field is started and runs to completion, after the second preset time interval, the anode rapper of the next electric field is started, until the anode rappers of all electric fields are started and run to completion; For each electric field, the anode rapper of one chamber is started first, and after the anode rapper of one chamber is started and runs, the anode rapper of another chamber is started after a third preset time interval, and after the anode rapper of another chamber is run, it is determined that the anode rapper of the electric field has completed its operation; Among them, in each electrostatic precipitator, the anode oscillator in the left chamber of the previous electric field is bound to the cathode oscillator in the right chamber of the next electric field, the anode oscillator in the right chamber of the previous electric field is bound to the cathode oscillator in the left chamber of the next electric field, the anode oscillator in the left chamber of the last electric field is bound to the cathode oscillator in the right chamber of the first electric field, and the anode oscillator in the right chamber of the last electric field is bound to the cathode oscillator in the left chamber of the first electric field. When each anode oscillator starts to operate, the cathode oscillator bound to it is started and operated synchronously.

5. The electrostatic precipitator vibration cleaning control method according to claim 4 is characterized in that: Each electrostatic precipitator includes four electric fields for collecting dust, namely the first electric field, the second electric field, the third electric field and the fourth electric field; the anode rapper in the left chamber of the first electric field is bound to the cathode rapper in the right chamber of the second electric field, and the anode rapper in the right chamber of the first electric field is bound to the cathode rapper in the left chamber of the second electric field; the anode rapper in the left chamber of the second electric field is bound to the cathode rapper in the right chamber of the third electric field, and the anode rapper in the right chamber of the second electric field is bound to the cathode rapper in the left chamber of the third electric field; the anode rapper in the left chamber of the third electric field is bound to the cathode rapper in the right chamber of the fourth electric field, and the anode rapper in the right chamber of the third electric field is bound to the cathode rapper in the left chamber of the fourth electric field; the anode rapper in the left chamber of the fourth electric field is bound to the cathode rapper in the right chamber of the first electric field, and the anode rapper in the right chamber of the fourth electric field is bound to the cathode rapper in the left chamber of the first electric field.

6. The electrostatic precipitator vibration cleaning control method according to claim 4 is characterized in that: There are two cathode rappers in each chamber, and the two cathode rappers form a redundant configuration.

7. The electrostatic precipitator vibration cleaning control method according to claim 1 is characterized in that: The operation time of the rapper decreases from the first electric field to the last electric field.

8. The electrostatic precipitator vibration cleaning control method according to claim 1 is characterized in that: It also includes a controller, and the electrostatic precipitator, the electric field and the rapper are all controlled to start and stop by the controller.

9. The electrostatic precipitator vibration cleaning control method according to claim 1, characterized in that: The air duct includes an air inlet, an air outlet, and a ash hopper located between the air inlet and the air outlet for collecting dust vibrated out of the electric field. The air inlet is located on one side of the electric field, the air outlet is located on the other side of the electric field, and the air inlet is connected to the fan through an air inlet pipe.

10. The electrostatic precipitator vibration cleaning control method according to claim 9, characterized in that: The multiple electric fields in each electrostatic precipitator are arranged in sequence, the air inlet is located on one side of the first electric field, and the air outlet is located on the other side of the last electric field.

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