Energy-saving control method of coke screening and dust removal pulse valve of coke conveying system

Abstract

The application provides an energy-saving control method of a coke screening and dust removal pulse valve of a coke conveying system, and comprises the following steps: S1, measuring the average ash production of the dust removal system under standard working conditions, and determining the ash removal amount of single-bin single-time back-blowing cycle; S2, based on the average ash production and the ash removal amount of single-bin single-time back-blowing cycle, calculating the minimum back-blowing time interval required to maintain the normal material level of the ash bin; S3, based on the minimum back-blowing time interval, setting a working cycle, wherein the working cycle comprises a back-blowing operation time for performing back-blowing operation and a subsequent cycle waiting time; S4, controlling the dust removal system to run in cycles according to the working cycle T total In the back-blowing operation time of each cycle, one pulse back-blowing of all ash bins is sequentially completed; and in the cycle waiting time, all pulse valves remain in standby state.

Description

Technical Field

[0001] This invention relates to the field of industrial dust removal technology, and more particularly to an energy-saving control method for a coke screening and dust removal pulse valve in a coke conveying system. Background Technology

[0002] In coke transportation systems of industries such as metallurgy and coking, the coke screening process is one of the main sources of dust generation. To ensure the normal operation of the production environment and equipment, baghouse dust collectors are typically used to purify the large amounts of dust generated during coke screening. The dust collector uses multiple ash bins to arrange filter bags; when dust-laden airflow passes through, dust is trapped on the surface of the filter bags. As dust accumulates, the air permeability of the filter bags decreases, and the system resistance increases. Regular pulse-jet cleaning is necessary to remove the adhering dust and maintain dust removal efficiency. Pulse-jet cleaning is a commonly used cleaning technique that utilizes the instantaneous release of high-pressure nitrogen to create an impact airflow, causing the filter bags to rapidly expand and vibrate, thereby shaking off the surface dust.

[0003] Currently, the pulse backflushing control method commonly used in the industry is a fixed-sequence cyclic control mode. In this mode, the system backflushes each ash bin sequentially according to a preset order. Once all ash bins have been backflushed, it is considered the end of one cycle, and then the next cycle begins immediately, repeating continuously. For example, in a coke screening dust removal system with 9 ash bins, a complete backflushing cycle takes approximately 11.5 minutes, after which a new cycle begins immediately, thus achieving uninterrupted dust removal operations.

[0004] However, the aforementioned traditional fixed-cycle backflushing control mode has several significant drawbacks: First, because the backflushing action is unrelated to the actual dust accumulation, a large amount of backflushing gas is consumed on filter bags that have not accumulated significant dust, resulting in a serious waste of high-pressure nitrogen resources and high operating costs. Second, the frequent and uniform backflushing rhythm fails to match the actual dust load in the ash hopper, leading to low cleaning efficiency and low cleaning efficiency per unit of gas consumption. Furthermore, key actuators such as pulse valves and diaphragms operate at high frequencies for extended periods, exacerbating mechanical and electrical wear, increasing equipment failure rates, and significantly increasing maintenance costs and replacement cycles. Therefore, how to achieve intelligent and energy-efficient cleaning processes while ensuring dust removal effectiveness, and reducing gas consumption and equipment wear, has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose an energy-saving control method for the coke screening and dust removal pulse valve of the coke conveying system, so as to solve the technical problem of serious waste of high-pressure nitrogen resources caused by the prior art.

[0006] The technical means employed in this invention are as follows:

[0007] An energy-saving control method for a coke screening and dust removal pulse valve in a coke conveying system includes the following steps: S1. Measure the average ash production of the dust removal system under standard operating conditions and determine the ash removal capacity of a single compartment in a single backflushing cycle; S2. Based on the average ash production and the amount of ash removed in a single backflushing cycle of a single bin, calculate the minimum backflushing time interval required to maintain the normal material level in the ash bin. S3. Based on the minimum backflushing time interval, set the work cycle, which includes the backflushing operation time for performing the backflushing operation and the subsequent cycle waiting time; S4. Control the dust removal system according to the working cycle T total The system operates in a cyclical manner, completing one pulse backflushing of all ash hoppers in sequence during the backflushing operation time of each cycle; during the cycle waiting time, all pulse valves remain in standby mode.

[0008] Further, the minimum backflush time interval T interval The calculation formula is as follows: T interval =g cycle / G avg Among them, g cycle G represents the amount of ash removed in a single backflushing cycle within a single compartment. avg This represents the average ash production.

[0009] Further in S3: T total = T blowing + T waiting ≈ T interval Among them, T total For the work cycle, T blowing For the backflushing operation time, T waiting T is the loop wait time. interval This is the minimum backflush time interval.

[0010] Further The minimum backflush time interval T interval The calculation formula is as follows, by introducing a safety factor K: T interval =(g cycle / G avg ) K The value of K ranges from 1.1 to 1.5.

[0011] Furthermore, in S3, the backflushing operation time is consistent with the time required for a single complete backflushing cycle of the original dust removal system.

[0012] Further in S1, the amount of ash removed in a single backflushing cycle of a single ash bin is obtained by weighing and measuring the ash material removed after a complete backflushing of all pulse valves in a single ash bin.

[0013] The present invention also provides a storage medium comprising a stored program, wherein, when the program is executed, the energy-saving control method for the coke screening and dust removal pulse valve of any of the above-mentioned coke transport system is performed.

[0014] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the energy-saving control method for the coke screening and dust removal pulse valve of any of the above-mentioned coke conveying systems through the computer program.

[0015] Compared with the prior art, the present invention has the following advantages: The intermittent cyclic backflushing control mode provided by this invention, by changing the traditional fixed-sequence continuous cycle to an intermittent cycle based on dynamic calculation of actual ash production, achieves a significant reduction in nitrogen consumption, improves energy saving rate, and significantly reduces system operating costs.

[0016] The backflushing strategy based on dynamic matching of ash production provided by this invention balances the ash removal effect and ash accumulation rate within the cycle, thereby significantly reducing the backflushing frequency while maintaining stable differential pressure in the dust removal system and ensuring that the dust removal efficiency is not affected.

[0017] The long-cycle intermittent working mode provided by this invention significantly reduces the frequency of operation of actuators such as pulse valves and diaphragms during ineffective or inefficient periods, thereby reducing mechanical wear and electrical fatigue of the equipment, extending the service life of key components, and reducing maintenance costs.

[0018] The pure software optimization control method provided by this invention, through quantitative analysis of the system's ash generation and cleaning capabilities and setting a scientific working cycle, can be achieved without modifying existing hardware equipment, simply by adjusting the control program. It has the advantages of low investment cost, convenient implementation, and easy promotion and application in similar industrial dust removal systems. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] like Figure 1 As shown, the present invention provides an energy-saving control method for a coke screening and dust removal pulse valve in a coke conveying system, comprising the following steps: S1. Measure the average ash production of the dust removal system under standard operating conditions and determine the ash removal capacity of a single compartment in a single backflushing cycle; S2. Based on the average ash production and the amount of ash removed in a single backflushing cycle of a single bin, calculate the minimum backflushing time interval required to maintain the normal material level in the ash bin. The core principle is to make the amount of ash accumulated in one backflushing cycle approximately equal to the amount of ash that can be removed in one complete backflushing cycle.

[0024] The minimum backflush time interval T interval The calculation formula is as follows: T interval =g cycle / G avg Among them, g cycle G represents the amount of ash removed in a single backflushing cycle within a single compartment. avg This represents the average ash production.

[0025] The minimum backflush time interval T interval The calculation formula is as follows, by introducing a safety factor K: T interval =(g cycle / G avg ) K The value of K ranges from 1.1 to 1.5 to ensure material level safety.

[0026] S3. Based on the minimum backflushing time interval, set a working cycle, which includes the backflushing operation time for performing the backflushing operation and the subsequent cycle waiting time; the backflushing operation time (T blowing The loop waiting time (T) remains consistent with the original system's single-cycle time (e.g., 11.5 minutes). waiting Based on the calculation settings (e.g., 20 minutes), the work cycle (T) is thus determined. total It is much larger than the original cycle period.

[0027] T total =T blowing +T waiting ≈T interval Among them, T total For the work cycle, T blowing For the backflushing operation time, T waiting T is the loop wait time. interval This is the minimum backflush time interval.

[0028] S4. Control the dust removal system to operate in a cycle according to the working cycle. During the backflushing operation time of each cycle, complete one pulse backflushing of all ash hoppers in sequence. During the cycle waiting time, all pulse valves remain in standby mode.

[0029] Example Taking the coke screening dust collector of a steel plant's coke transportation system as an example, it has 9 ash bins, each with 12 pulse valves. The original system used infinite backflushing, and one cycle (bins 1-9) took 11.5 minutes and consumed 54 m³ of nitrogen.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy-saving control method for a coke screening and dust removal pulse valve in a coke conveying system, characterized in that, Includes the following steps: S1. Measure the average ash production of the dust removal system under standard operating conditions and determine the ash removal capacity of a single compartment in a single backflushing cycle; S2. Based on the average ash production and the amount of ash removed in a single backflushing cycle of a single bin, calculate the minimum backflushing time interval required to maintain the normal material level in the ash bin. S3. Based on the minimum backflushing time interval, set the work cycle, which includes the backflushing operation time for performing the backflushing operation and the subsequent cycle waiting time; S4. Control the dust removal system to operate in a cyclical manner according to the working cycle, and complete one pulse backflushing of all ash hoppers in sequence during the backflushing operation time of each cycle; During the cycle waiting time, all pulse valves remain in standby mode.

2. The energy-saving control method for the coke screening and dust removal pulse valve of the coke conveying system according to claim 1, characterized in that, The minimum backflush time interval T interval The calculation formula is as follows: T interval =g cycle / G avg Among them, g cycle G represents the amount of ash removed in a single backflushing cycle within a single compartment. avg This represents the average ash production.

3. The energy-saving control method for the coke conveying system's coke screening and dust removal pulse valve according to claim 1, characterized in that, In S3: T total =T blowing +T waiting ≈T interval Among them, T total For the work cycle, T blowing For the backflushing operation time, T waiting T is the loop wait time. interval This is the minimum backflush time interval.

4. The energy-saving control method for the coke conveying system's coke screening and dust removal pulse valve according to claim 2, characterized in that, The minimum backflush time interval T interval The calculation formula is as follows, by introducing a safety factor K: T interval =(g cycle / G avg ) K The value of K ranges from 1.1 to 1.

5.

5. The energy-saving control method for the coke screening and dust removal pulse valve of the coke conveying system according to claim 1, characterized in that, In S3, the backflushing operation time is consistent with the time required for a single complete backflushing cycle of the original dust removal system.

6. The energy-saving control method for the coke screening and dust removal pulse valve of the coke conveying system according to claim 1, characterized in that, In S1, the amount of ash removed in a single backflushing cycle of a single ash bin is obtained by weighing and measuring the ash material removed after a complete backflushing of all pulse valves in a single ash bin.

7. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it performs the energy-saving control method for the coke screening and dust removal pulse valve of the coke transport system as described in any one of claims 1 to 6.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the energy-saving control method for the coke screening and dust removal pulse valve of the coke transport system according to any one of claims 1 to 6 through the computer program.

Images