阅读说明：本技术 一种基于锅炉煤量风量的电除尘节能控制方法及系统 (Electric precipitation energy-saving control method and system based on boiler coal quantity and air quantity ) 是由 张盛强 马晓军 王振姬 王玉林 葛军 马国荣 张延伟 于 2020-05-22 设计创作，主要内容包括：本发明公开一种基于锅炉煤量风量的电除尘节能控制方法,包括：获取锅炉的当前总煤量、当前总风量和电除尘器出口粉尘含量；根据公式I<Sub>I2</Sub>＝[(T-T<Sub>target</Sub>)/(T<Sub>max</Sub>-T<Sub>min</Sub>)]*(I<Sub>I2max</Sub>-I<Sub>I2min</Sub>)+I<Sub>Icoal</Sub>+I<Sub>Iw</Sub>计算电场二次电流目标值,并将电除尘器的当前电场二次电流值调整为所述电场二次电流目标值。如此,以锅炉总煤量代替机组负荷来控制电除尘参数,能够克服煤质变化带来的控制偏差,且较机组负荷更具有实时性；同时,以锅炉总风量为前馈信号,可以提高机组负荷动态变化过程中粉尘的动态控制效果。因此,能够提高电除尘器的自动控制效果,防止电厂粉尘超标排放,实现环保目的,同时降低电厂用电率,达到节能目的。本发明还公开一种基于锅炉煤量风量的电除尘节能控制系统,其有益效果如上所述。(The invention discloses an electric precipitation energy-saving control method based on boiler coal volume and air volume, which comprises the following steps: acquiring the current total coal quantity, the current total air quantity and the dust content at the outlet of an electric dust collector of a boiler; according to formula I I2 ＝[(T‑T target )/(T max ‑T min )]*(I I2max ‑I I2min )+I Icoal +I Iw And calculating a target value of the electric field secondary current, and adjusting the current value of the electric field secondary current of the electric dust collector to the target value of the electric field secondary current. Therefore, the total coal quantity of the boiler is used for replacing the unit load to control the electric precipitation parameters, so that the control deviation caused by the change of the coal quality can be overcome, and the real-time performance is higher than that of the unit load; meanwhile, the total air volume of the boiler is used as a feedforward signal, so that the dynamic control effect of dust in the dynamic change process of the unit load can be improved. Therefore, the automatic control effect of the electric dust remover can be improved, the dust of the power plant is prevented from exceeding the standard and being discharged, the purpose of environmental protection is realized, and meanwhile, the power consumption rate of the power plant is reduced, and the purpose of energy conservation is achieved. The invention also discloses a method for measuring the coal quantity based on the boilerThe electric precipitation energy-saving control system of the air quantity has the beneficial effects as described above.)

1. An electric precipitation energy-saving control method based on boiler coal volume and air volume is characterized by comprising the following steps:

acquiring the current total coal quantity, the current total air quantity and the dust content at the outlet of an electric dust collector of a boiler;

according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwCalculating a secondary current target value of an electric field, and adjusting the current secondary current value of the electric dust collector to the secondary current target value of the electric field; wherein the content of the first and second substances,

I_I2is the target value of the secondary current of the electric field,

t is the current value of the dust content at the outlet of the electric dust collector,

T_targetis a preset target value of the dust content at the outlet of the electric dust collector,

T_minthe lower limit of the dust content interval at the outlet of the electric dust collector is determined according to the current total coal amount,

T_maxthe upper limit of the interval of the dust content at the outlet of the electric dust collector is determined according to the current total coal amount,

I_I2minthe lower limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_I2maxthe upper limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_Icoalis an electric field secondary current regulating value determined according to the current total coal quantity,

I_Iwthe electric field secondary current regulating value is determined according to the current total air volume.

2. The electric precipitation energy-saving control method based on the coal quantity and the air quantity of the boiler according to claim 1, further comprising the following steps:

and acquiring the dust content of the clean smoke, and determining the target value of the dust content at the outlet of the electric dust collector according to the dust content of the clean smoke.

3. The electric precipitation energy-saving control method based on the coal quantity and the air quantity of the boiler according to claim 2, characterized by further comprising:

and when the dust content of the clean smoke exceeds the discharge standard, adjusting the current secondary current value of the electric field of the electric dust collector to a preset rated value.

4. The electric precipitation energy-saving control method based on the coal quantity and the air quantity of the boiler according to claim 3, characterized by further comprising the following steps:

when T is equal to T_maxIn the process, the current secondary current value of the electric field of the electric dust collector is adjusted to be I_I2maxAnd when T is<T_minIn the process, the current secondary current value of the electric field of the electric dust collector is adjusted to be I_I2min。

5. The electric precipitation energy-saving control method based on boiler coal volume and air volume of claim 1, characterized in that the method is based on formula I_Icoal＝f(x)＝K₁X calculating the I_IcoalWherein x is the current total coal amount, K₁The function is automatically corrected for a subsection proportion function determined by debugging or a function with neural network algorithm and a self-learning algorithm.

6. The electric precipitation energy-saving control method based on boiler coal volume and air volume of claim 5, characterized in that the method is based on formula I_IwCalculating said I ═ W (y)_IwWherein y is the current total air volume, and:

when dy/dt>When 0, W (y) is K₂·(dy/dt)；

When dy/dt<When 0, W (y) is I_Icoal(t-N)-I_Icoal(t)；

K₂The function is a function which is automatically corrected for a subsection proportion function determined through debugging or a neural network algorithm and a self-learning algorithm, and N is delay time.

7. The utility model provides an electric precipitation energy-saving control system based on boiler coal volume amount of wind which characterized in that includes:

the parameter acquisition module is used for acquiring the current total coal quantity and the current total air quantity of the boiler and the dust content at the outlet of the electric dust collector;

an analysis adjustment module for adjusting the analysis according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwCalculating a secondary current target value of an electric field, and adjusting the current secondary current value of the electric dust collector to the secondary current target value of the electric field; wherein the content of the first and second substances,

I_I2is the target value of the secondary current of the electric field,

t is the current value of the dust content at the outlet of the electric dust collector,

T_targetis a preset target value of the dust content at the outlet of the electric dust collector,

T_minthe lower limit of the dust content interval at the outlet of the electric dust collector is determined according to the current total coal amount,

T_maxthe upper limit of the interval of the dust content at the outlet of the electric dust collector is determined according to the current total coal amount,

I_I2minthe lower limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_I2maxthe upper limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_Icoalis an electric field secondary current regulating value determined according to the current total coal quantity,

I_Iwthe electric field secondary current regulating value is determined according to the current total air volume.

8. The electric precipitation energy-saving control system based on boiler coal volume and air volume of claim 7, further comprising:

and the intervention adjusting module is used for adjusting the current secondary current value of the electric field of the electric dust collector to a preset rated value when the dust content of the clean smoke exceeds the emission standard.

Technical Field

The invention relates to the technical field of boilers, in particular to an electric precipitation energy-saving control method based on the coal quantity and air quantity of a boiler. The invention also relates to an electric precipitation energy-saving control system based on the coal quantity and air quantity of the boiler.

Background

With the development of Chinese power technology, more and more power plants are put into use.

Thermal power generation is the main force of modern society power development, and under the big background of establishing harmonious society and developing circular economy, the thermal power technology development direction is mainly considering the influence of electric power on the environment and the influence on non-renewable energy. With the change of the structure of power Generation enterprises in China, the new energy power Generation enterprises occupy larger and larger proportions in the power grid, so that a thermal power plant is required to participate in power grid peak shaving and primary frequency modulation more, and the requirement on AGC (Automatic Generation Control) performance is higher and higher.

For a thermal power plant, the dust content in flue gas emission is an important index. There are many methods for controlling the dust content when the flue gas is discharged, and there are cloth bag type dust removal methods, electric dust removal methods, etc., among which the electric dust removal methods are most widely used. For the electric dust removal method, the electric field current is adjusted by adjusting the voltage of each electric field, so that the dust removal efficiency is adjusted, and the dust at the outlet of the dust remover is controlled. Because the electric dust removal efficiency is improved, the plant power consumption rate can be synchronously improved, and therefore, from the aspect of economy, the lowest electric dust removal plant power consumption rate is the final target of electric dust removal control on the premise of ensuring the environmental protection index to reach the standard.

In the actual operation process, because the automatic control effect of the electric dust removal is not ideal, the control of the electric field operation parameters of the electric dust remover is mainly controlled manually by operators, and the manual control of the operators mainly adjusts the current of each electric field manually according to the dust content of the outlet of the electric dust removal and the dust content of the clean flue gas, so as to achieve the purpose of adjusting the dust content of the outlet of the electric dust removal and the dust content of the clean flue gas to the target dust content. This causes the personnel to lag the control of the electrostatic precipitator relatively and cannot adjust the electric field current in real time according to the unit load. And the load change of the unit is slower than the change of the dust content, and the load change of the unit cannot accurately represent the dust content entering the electric dust collector in the coal quality change process. The mode not only has the environmental protection risk, also can cause electrostatic precipitator station power consumption rate higher.

Therefore, how to improve the automatic control effect of the electric dust remover, prevent the dust of the power plant from exceeding the standard and discharging, realize the purpose of environmental protection, reduce the power consumption rate of the power plant and achieve the purpose of energy conservation is a technical problem to be solved urgently by technical personnel in the field.

Disclosure of Invention

The invention aims to provide an electric dust removal energy-saving control method based on the coal quantity and air quantity of a boiler, which can improve the automatic control effect of an electric dust remover, prevent dust of a power plant from exceeding standard, realize the aim of environmental protection, reduce the power consumption rate of the power plant and achieve the aim of saving energy. The invention also aims to provide an electric precipitation energy-saving control system based on the coal quantity and air quantity of the boiler.

In order to solve the technical problems, the invention provides an electric precipitation energy-saving control method based on boiler coal volume and air volume, which comprises the following steps:

acquiring the current total coal quantity, the current total air quantity and the dust content at the outlet of an electric dust collector of a boiler;

according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwCalculating a secondary current target value of an electric field, and adjusting the current secondary current value of the electric dust collector to the secondary current target value of the electric field; wherein the content of the first and second substances,

I_I2is the target value of the secondary current of the electric field,

t is the current value of the dust content at the outlet of the electric dust collector,

T_targetis a preset target value of the dust content at the outlet of the electric dust collector,

T_minthe lower limit of the dust content interval at the outlet of the electric dust collector is determined according to the current total coal amount,

T_maxthe upper limit of the interval of the dust content at the outlet of the electric dust collector is determined according to the current total coal amount,

I_I2minthe lower limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_I2maxthe upper limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_Icoalis an electric field secondary current regulating value determined according to the current total coal quantity,

I_Iwthe electric field secondary current regulating value is determined according to the current total air volume.

Preferably, the method further comprises the following steps:

and acquiring the dust content of the clean smoke, and determining the target value of the dust content at the outlet of the electric dust collector according to the dust content of the clean smoke.

Preferably, the method further comprises the following steps:

and when the dust content of the clean smoke exceeds the discharge standard, adjusting the current secondary current value of the electric field of the electric dust collector to a preset rated value.

Preferably, the method further comprises the following steps:

when T is equal to T_maxIn the process, the current secondary current value of the electric field of the electric dust collector is adjusted to be I_I2maxAnd when T is<T_minIn the process, the current secondary current value of the electric field of the electric dust collector is adjusted to be I_I2min。

Preferably, according to formula I_Icoal＝f(x)＝K₁X calculating the I_IcoalWherein x is the current total coal amount, K₁The function is automatically corrected for a subsection proportion function determined by debugging or a function with neural network algorithm and a self-learning algorithm.

Preferably, according to formula I_IwCalculating said I ═ W (y)_IwWherein y is the current total air volume, and:

when dy/dt>When 0, W (y) is K₂·(dy/dt)；

When dy/dt<When 0, W (y) is I_Icoal(t-N)-I_Icoal(t)；

K₂The function is a function which is automatically corrected for a subsection proportion function determined through debugging or a neural network algorithm and a self-learning algorithm, and N is delay time.

The invention also provides an electric precipitation energy-saving control system based on the coal quantity and air quantity of the boiler, which comprises the following components:

the parameter acquisition module is used for acquiring the current total coal quantity and the current total air quantity of the boiler and the dust content at the outlet of the electric dust collector;

an analysis adjustment module for adjusting the analysis according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwCalculating a secondary current target value of an electric field, and adjusting the current secondary current value of the electric dust collector to the secondary current target value of the electric field; wherein the content of the first and second substances,

I_I2is the target value of the secondary current of the electric field,

t is the current value of the dust content at the outlet of the electric dust collector,

T_targetis a preset target value of the dust content at the outlet of the electric dust collector,

T_minthe lower limit of the dust content interval at the outlet of the electric dust collector is determined according to the current total coal amount,

T_maxthe upper limit of the interval of the dust content at the outlet of the electric dust collector is determined according to the current total coal amount,

I_I2minthe lower limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_I2maxthe upper limit of the electric field secondary current regulation interval is determined according to the current total coal quantity,

I_Icoalis an electric field secondary current regulating value determined according to the current total coal quantity,

I_Iwthe electric field secondary current regulating value is determined according to the current total air volume.

Preferably, the method further comprises the following steps:

and the intervention adjusting module is used for adjusting the current secondary current value of the electric field of the electric dust collector to a preset rated value when the dust content of the clean smoke exceeds the emission standard.

The invention provides an electric precipitation energy-saving control method based on boiler coal quantity and air quantity. In the second step, the main content is according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwAnd calculating a target value of the electric field secondary current, and adjusting the current value of the electric field secondary current of the electric dust collector to the calculated target value of the electric field secondary current. The electric field secondary current target value is formed by accumulating three items, namely a corresponding electric field secondary current regulating value determined according to the deviation severity degree of the dust content at the outlet of the electric dust collector and the target value, an electric field secondary current regulating value determined according to the current total coal quantity and an electric field secondary current regulating value determined according to the current total air quantity. The total coal quantity can well represent the actual change of the dust quantity, is accurate in measurement and has a certain corresponding relation with the dust content entering the electric dust collector, so that the total coal quantity of the boiler is used for replacing the unit load in the prior art to control the electric dust collector parameters, the control deviation caused by the change of the coal quality can be overcome, and the real-time performance is higher than that of the unit load; meanwhile, the total air volume of the boiler is used as a feedforward signal, so that the electric precipitation parameters can be improved in advance when the load is increased, and the electric precipitation parameters are reduced in a delayed manner in the load reduction process, so that the dynamic control effect of the dust at the outlet of the electric precipitator in the dynamic change process of the unit load is improved. Therefore, after the electric dust remover is automatically controlled, the electric dust remover can operate in the optimal working condition adaptive to the load of a unit, higher control parameters set by human reasons during manual control are eliminated, and the station power consumption rate of the electric dust remover is reduced. Compared with the prior art, the invention can improve the automatic control effect of the electric dust collector, prevent the dust of the power plant from exceeding standard and realizing the aim of environmental protection, and simultaneously reduce the power consumption rate of the power plant and achieve the aim of energy conservation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a flow chart of an embodiment of the present invention.

FIG. 2 is a block diagram of an embodiment of the present invention.

Wherein, in fig. 2:

the system comprises a parameter acquisition module-1, an analysis adjustment module-2 and an intervention adjustment module-3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of the present invention.

In a specific embodiment provided by the invention, the electric precipitation energy-saving control method based on the coal quantity and air quantity of the boiler mainly comprises two steps, which are respectively as follows:

s1, acquiring the current total coal quantity and current total air quantity of the boiler and the dust content at the outlet of the electric dust collector;

s2, according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwCalculating a target value of the secondary current of the controlled electric field, and adjusting the current value of the secondary current of the electric dust collector to the target value of the secondary current of the electric field; wherein, I_I2Is the target value of the secondary current of the electric field, T is the current value of the dust content at the outlet of the electric dust collector, T_targetIs a preset target value of dust content at the outlet of the electric dust collector, T_minThe lower limit of the dust content interval, T, of the outlet of the electric dust collector determined according to the current total coal quantity_maxIs the upper limit of the interval of dust content at the outlet of the electric dust collector, I, determined according to the current total coal quantity_I2minFor adjusting the lower limit of the interval for the secondary current of the electric field, I, determined according to the current total coal quantity_I2maxFor the upper limit of the electric field secondary current regulation interval, I, determined according to the current total coal quantity_IcoalFor the secondary current regulation of the electric field, determined on the basis of the current total coal quantity, I_IwThe electric field secondary current regulating value is determined according to the current total air quantity.

In the first step, the main contents are three parameters of the current total coal quantity of the boiler, the current total air quantity and the dust content at the outlet of the electric dust collector. Specifically, the three parameters can be acquired through a PLC analog input channel in the system, and can also be acquired from a DCS system of the generator set in a wired or wireless communication mode.

In the second step, the main content is according to formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwAnd calculating a target value of the electric field secondary current, and adjusting the current value of the electric field secondary current of the electric dust collector to the calculated target value of the electric field secondary current. The electric field secondary current target value is formed by accumulating three items, namely a corresponding electric field secondary current regulating value determined according to the deviation severity degree of the dust content at the outlet of the electric dust collector and the target value, an electric field secondary current regulating value determined according to the current total coal quantity and an electric field secondary current regulating value determined according to the current total air quantity.

The total coal quantity can well represent the actual change of the dust quantity, is accurate in measurement and has a certain corresponding relation with the dust content entering the electric dust collector, so that the total coal quantity of the boiler is used for replacing the unit load in the prior art to control the electric dust collector parameters, the control deviation caused by the change of the coal quality can be overcome, and the real-time performance is higher than that of the unit load; meanwhile, the total air volume of the boiler is used as a feedforward signal, so that the electric precipitation parameters can be improved in advance when the load is increased, and the electric precipitation parameters are reduced in a delayed manner in the load reduction process, so that the dynamic control effect of the dust at the outlet of the electric precipitator in the dynamic change process of the unit load is improved.

Therefore, after the electric dust remover is automatically controlled, the electric dust remover can operate in the optimal working condition adaptive to the load of a unit, higher control parameters set by human reasons during manual control are eliminated, and the station power consumption rate of the electric dust remover is reduced. Compared with the prior art, the automatic control effect of the electric dust remover can be improved, the dust of the power plant is prevented from exceeding the standard and being discharged, the environment protection purpose is realized, the power consumption rate of the power plant is reduced, and the energy-saving purpose is achieved.

In addition, in order to ensure that the electric field secondary current of electrostatic precipitator passes through the adjustment back, can make generating set's emission reach the environmental protection standard, add the detection to clean flue gas dust content in this embodiment. The device has the advantages that the device can detect the content of clean smoke dust at the discharge port of the generator set, the content of the clean smoke dust represents the content of the dust during smoke discharge, the device is an important parameter for environmental protection monitoring, the signal can be introduced into an electric dust removal closed-loop system, and the smoke dust content is ensured to be discharged up to the standard. Generally, the dust content of the clean flue gas is generally lower than that of the electric precipitation outlet, because the desulfurization absorption tower also has a certain dust removal effect, the dust content of the electric precipitation outlet can be properly improved on the premise of fully utilizing the dust removal function of the absorption tower, and therefore the purpose of energy conservation is achieved. Therefore, the target value of the dust content at the outlet of the electric dust collector can be determined according to the dust content of the clean smoke and the specific gravity of the emission standard.

Further, because the emission of generating set reaches the environmental protection standard and is that the legal and legal regulations require to realize, consequently, in the automatic control in-process of electrostatic precipitator, if the condition that clean flue gas dust content surpassed emission standard appears, then directly adjust the current electric field secondary current value of electrostatic precipitator for predetermined rated value, thereby make control system jump out closed loop interval parameter setting strategy automatically, adjust the secondary current set value of electric field to the rated value, can reduce electrostatic precipitator export dust fast, thereby guarantee discharge to reach standard.

Generally, the expected value interval of the dust content at the outlet of the electric dust collector and the corresponding current value interval under different coal feeding quantity ranges are shown in the following table, and the corresponding relation is the optimal value summarized in the running process of the unit.

Range of coal supply (t/h)	0-80	80-160	160-240	240-300
					Dust range at outlet of electric dust collector (mg)	12-20	12-20	12-20	12-20
Electric field secondary current regulating range (mA)	300–400	370–450	430-550	530-700

A plurality of electric fields for dust removal are generally arranged in the electric dust remover, for example, 1-6 electric fields are arranged, the secondary current adjusting ranges of different electric fields are different, and the secondary current adjusting methods are the same.

In addition, when the electric dust removalWhen the dust value at the outlet of the device reaches the upper limit of the preset interval, namely T is T_maxIn the process, the current electric field secondary current value of the electric dust collector can be directly adjusted to be the upper limit of an adjusting interval, namely I, because the dust value is high and serious_I2max. Similarly, when the dust value at the outlet of the electric dust collector is smaller than the lower limit of the preset interval, namely T<T_minIn the process, because the dust value is small and slight, the current secondary current value of the electric field of the electric dust collector can be directly adjusted to be the lower limit of the adjusting interval, namely I_I2min。

Determining the secondary current regulation value I of the electric field according to the current total coal quantity_IcoalWhen, in particular, it can be according to formula I_Icoal＝f(x)＝K₁X calculating the I_IcoalAnd x is the current total coal quantity. It can be seen that I_IcoalIs proportionally related to the current total coal amount, and the proportionality coefficient K₁It is generally necessary to make a determination in a specific commissioning. Of course, the current total coal quantity and I_IcoalThe relation function between the two functions can be a proportional function taking the current total coal amount as a dependent variable, a piecewise linear function or a function automatically corrected by a neural network algorithm and a self-learning algorithm, and the specific selection of the function form needs to be determined according to the electric precipitation characteristics.

Similarly, determining the secondary current regulation value I of the electric field according to the current total air volume_IwWhen, in particular, it can be according to formula I_IwCalculating said I ═ W (y)_IwAnd y is the current total air volume. The functional relationship is composed of two parts:

when dy/dt>When 0, W (y) is K₂·(dy/dt)；

When dy/dt<When 0, W (y) is I_Icoal(t-N)-I_Icoal(t)。

Wherein K₂To be scaling factors, it is generally necessary to determine them in a specific commissioning. Of course, the coefficient may also be a nonlinear function with the current total coal amount as a dependent variable, or a function with automatic correction by a neural network algorithm and a self-learning algorithm, and N is the delay time. Therefore, the function output is always positive, and the output is zero when the current total air volume is unchanged. At the current change rate of the total air volumeWhen the rate is positive, the function output begins to increase, and the secondary current of the electric dust collector is increased in advance before the current total coal quantity is unchanged, so that the dust at the outlet of the electric dust collector is prevented from exceeding the limit. When the current change rate of the total air volume is negative, the function output is used for slowing down I_I2The reduction of the dust in the coal mill is avoided, and the dust at the outlet of the electric dust collector exceeds the standard due to the low electric dust collection parameters when the accumulated dust in the coal mill is continuously blown out. W (y) needs to be summarized in the operation process according to the characteristics of the electric field, and can be a function for automatically correcting a neural network algorithm and a self-learning algorithm.

Fig. 2 is a block diagram of an embodiment of the present invention, as shown in fig. 2.

The embodiment also provides an electric precipitation energy-saving control system based on the coal quantity and air quantity of the boiler, which mainly comprises a parameter acquisition module 1 and an analysis and adjustment module 2. The parameter acquisition module 1 is mainly used for the current total coal quantity and the current total air quantity of the boiler and the dust content at the outlet of the electric dust collector. The analysis and adjustment module 2 is mainly used for analyzing and adjusting the parameters according to the formula I_I2＝[(T-T_target)/(T_max-T_min)]*(I_I2max-I_I2min)+I_Icoal+I_IwAnd calculating a target value of the electric field secondary current, and adjusting the current value of the electric field secondary current of the electric dust collector to the target value of the electric field secondary current. Wherein, the terms related in the formula are the same as the terms in the foregoing method embodiments, and are not described herein again.

In addition, an intervention adjusting module 3 is additionally arranged in the embodiment. Specifically, the intervention adjusting module 3 is mainly used for directly adjusting the current secondary current value of the electric field of the electric dust collector to a preset rated value when the dust content of the clean flue gas exceeds the emission standard.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.