CN112742161A - Material balance control method and system for flue gas purification system - Google Patents

Material balance control method and system for flue gas purification system Download PDF

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CN112742161A
CN112742161A CN201911051344.4A CN201911051344A CN112742161A CN 112742161 A CN112742161 A CN 112742161A CN 201911051344 A CN201911051344 A CN 201911051344A CN 112742161 A CN112742161 A CN 112742161A
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adsorption unit
time
working frequency
circular roller
actual
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CN112742161B (en
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李勇
钦柏豪
王冰
李建光
马海滨
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Hunan Zhongye Changtian Energy Conservation And Environmental Protection Technology Co ltd
Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0454—Controlling adsorption
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    • B01D2257/00—Components to be removed
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01D—SEPARATION
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    • B01D2258/0283—Flue gases
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Abstract

The embodiment of the invention discloses a material balance control method and a material balance control system for a flue gas purification system, wherein the material balance control method comprises the following steps: acquiring the working time of an automatic feeding push rod of each adsorption unit and the first working frequency of a circular roller unloader of each adsorption unit in a preset time period; determining the actual feeding time of each adsorption unit according to the working time; if the relative deviation value of the actual feeding time of the adsorption unit does not meet the preset first deviation threshold range, generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency of the adsorption unit; and adjusting the first working frequency of the circular roller unloader of the adsorption unit to be a second working frequency. The working frequency of the circular roller unloader of each adsorption unit is adjusted by utilizing the working time of the feeding push rod of each adsorption unit, so that the accurate control of the blanking amount of each adsorption unit is realized, the blanking amount of each adsorption unit tends to be consistent, the material temperature runaway in the absorption tower is effectively avoided, and the stable operation of the system is ensured.

Description

Material balance control method and system for flue gas purification system
Technical Field
The invention relates to the technical field of flue gas purification, in particular to a material balance control method and system for a flue gas purification system.
Background
At present, in iron and steel enterprises, sulfur oxides (such as SO 2) and nitrogen oxides (such as NO and NO 2) in sintering flue gas generated in a sintering process account for the vast majority of the total amount of pollution emission of the iron and steel enterprises, and in order to reduce air pollution caused by the emission of the sintering flue gas, the sintering flue gas needs to be subjected to treatments such as desulfurization and denitrification. Iron and steel enterprises usually adopt a special flue gas purification system, and materials (such as activated carbon) with adsorption function are placed in the flue gas purification system to adsorb sintering flue gas, so that desulfurization, denitration and other treatments of the sintering flue gas are realized.
Referring to fig. 1, fig. 1 is a schematic diagram of a flue gas purification system in the prior art. As can be seen in fig. 1, the flue gas cleaning system comprises: an absorption tower 1, a desorption tower 2, a desorption tower feeding conveyor 3 and an absorption tower feeding conveyor 4, wherein the absorption tower 1 for processing large smoke gas amount comprises a plurality of adsorption units. The sintering flue gas is pressurized and then is respectively conveyed to each adsorption unit, and pollutants in the sintering flue gas are adsorbed by materials (such as activated carbon) in the absorption tower 1. The material of load pollutant discharges to analysis tower feeding conveyor 3 through adsorption unit's round roller unloader 5, then is carried to analysis tower 2 by analysis tower feeding conveyor 3 in, analysis tower 2 heats the material of load pollutant and analyzes, discharges to absorption tower feeding conveyor 4 through the material of heating analysis on, then is carried again to absorption tower 1 in-cycle use by absorption tower feeding conveyor 4 to continuously purify the sintering flue gas.
After the materials are analyzed and activated in the analyzing tower 2, in the process of conveying the materials to the absorbing tower 1 through the absorbing tower feeding conveyor 4, the materials are controlled to enter the corresponding absorbing units through the feeding push rods 6 of the absorbing units, the feeding push rods 6 of the absorbing units do not work at the same time, and only one feeding push rod works at any time. In order to accurately control and balance the blanking amount of each adsorption unit, in the prior art, a circular roller unloader is used to control the blanking amount, as shown in fig. 2 and 3, the circular roller unloader is generally a cylinder with a length of about 10m and a diameter of about 200mm, when the circular roller unloader works, the material stored in the adsorption unit is discharged by rotation, and the discharging speed of the material is controlled by the rotation speed (frequency conversion operation) of the circular roller unloader. In the blanking process, the adsorption units are filled with materials, and along with the continuous discharge of the circular roller unloader at the lower part of the adsorption units, the material level of a material bin (such as an activated carbon bin) corresponding to the adsorption units is reduced. The material bin is provided with material level detection, when low material level is detected, the material inlet push rod corresponding to the adsorption unit works, and the activated material is added into the material bin corresponding to the adsorption unit until high material level is detected.
However, because the length of the round roller unloader is large, the adsorption units are discharged by the round roller unloader, absolute uniform discharging is difficult to achieve, the material discharging amount of each adsorption unit can deviate from a design value, some adsorption units are more discharged, and some adsorption units are less discharged. Uneven blanking can cause uneven temperature fields of all the adsorption units, uneven temperature fields can easily cause material temperature runaway in the absorption tower, unstable operation is caused, operation accidents can be seriously caused, production is influenced, and great direct and indirect economic losses are caused.
Disclosure of Invention
The invention provides a material balance control method and system for a flue gas purification system, and aims to solve the problems that in the prior art, due to the fact that a round roller unloader is large in length, adsorption units are discharged by the round roller unloader, absolutely uniform discharging is difficult to achieve, the discharging amount of materials of each adsorption unit deviates from a design value, the temperature field of each adsorption unit is uneven, the temperature of active carbon in an absorption tower is easy to fly due to the fact that the temperature field is uneven, and operation is unstable.
In a first aspect, the present invention provides a material balance control method for a flue gas purification system, including:
acquiring the working time of an automatic feeding push rod of each adsorption unit and the first working frequency of a circular roller unloader of each adsorption unit in a preset time period;
determining the actual feeding time of each adsorption unit according to the working time;
if the relative deviation value of the actual feeding time of the adsorption unit does not meet the range of a preset first deviation threshold value, generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency of the adsorption unit;
and adjusting the first working frequency of the circular roller unloading machine of the adsorption unit to be a second working frequency.
Further, the material balance control method further comprises the following steps:
and if the relative deviation value of the actual feeding time of the adsorption unit meets a preset first deviation threshold range, maintaining a first working frequency of a circular roller unloader of the adsorption unit.
Further, the material balance control method further comprises the following steps:
and if the first working frequency of the circular roller unloader of each adsorption unit is the same and the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset second deviation threshold range, determining that the circular roller unloader of the adsorption unit is in an abnormal state.
Further, the material balance control method further comprises the following steps:
and if the first working frequency of the circular roller unloader of each adsorption unit is the same, determining material flow parameters according to the actual feeding time of the adsorption unit, wherein the material flow parameters are used for judging the material flow state of the whole adsorption unit.
Further, determining a stream parameter according to the actual feed time of the adsorption unit, specifically comprising:
calculating the material flow parameter according to the actual feeding time of the adsorption unit according to the following relational expression:
Figure BDA0002255398150000021
wherein x represents the average of the actual feed times, Tn represents the actual feed time of the nth adsorption unit, n is a positive integer greater than or equal to 1, and y represents a stream parameter.
Further, the generating of the second operating frequency of the circular roller unloader of the adsorption unit according to the actual feeding time and the first operating frequency of the adsorption unit specifically includes:
calculating the second working frequency according to the actual feeding time and the first working frequency of the adsorption unit and the following relational expression:
Figure BDA0002255398150000031
wherein M1 represents the second operating frequency, M represents the first operating frequency, Tn represents the actual feed time of the nth adsorption unit, Ti represents the actual feed time of the ith adsorption unit, n is a positive integer greater than or equal to 1, i is a positive integer greater than or equal to 1, and i is less than or equal to n.
In a second aspect, the present invention further provides a material balance control system for a flue gas purification system, comprising:
the acquisition module is used for acquiring the working time of the feeding push rod of each adsorption unit and the first working frequency of the round roller unloading machine in a preset time period;
a first determining module for determining the actual feed time of each adsorption unit according to the working time;
the generating module is used for generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency of the adsorption unit when the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset first deviation threshold range;
and the adjusting module is used for adjusting the first working frequency of the circular roller unloading machine of the adsorption unit to be a second working frequency.
Further, the material balance control system further comprises:
and the maintaining module is used for maintaining the first working frequency of the circular roller unloader of the adsorption unit when the relative deviation value of the actual feeding time of the adsorption unit meets a preset first deviation threshold range.
Further, the material balance control system further comprises:
and the second determining module is used for determining that the circular roller unloading machines of the adsorption units are in an abnormal state when the actual working frequency of the circular roller unloading machines of each adsorption unit is the same and the relative deviation value of the actual feeding time of each adsorption unit does not meet the preset second deviation threshold range.
Further, the material balance control system further comprises:
and the third determining module is used for determining material flow parameters according to the actual feeding time of the adsorption units when the first working frequency of the circular roller unloading machine of each adsorption unit is the same, wherein the material flow parameters are used for judging the material flow state of the whole adsorption unit.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects: the invention provides a material balance control method and system for a flue gas purification system. According to the material balance control method, the working frequency of the circular roller unloader of each adsorption unit is adjusted by utilizing the working time of the feeding push rod of each adsorption unit, so that the feeding amount of each adsorption unit is accurately controlled, the feeding amount of each adsorption unit tends to be consistent, the material flying temperature in the absorption tower is effectively avoided, and the stable operation of the system is ensured.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flue gas purification system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an adsorption unit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a circular roller unloader provided in an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a material balance control method for a flue gas purification system according to an embodiment of the present invention;
fig. 5 is a block diagram of a material balance control system for a flue gas purification system according to an embodiment of the present invention.
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.
It can know to combine the background art, among the prior art, carrying out purification treatment's in-process to the sintering flue gas, adopts the circle roller unloader to control the unloading volume, but, because circle roller unloader length is big, the absorption unit leans on the circle roller unloader to arrange the material, hardly accomplishes absolutely even unloading, causes every absorption unit's material unloading volume can deviate the design value, and some absorption unit unloading are many, and some absorption unit unloading are few. Uneven blanking can cause uneven temperature fields of all the adsorption units, uneven temperature fields can easily cause material temperature runaway in the absorption tower, unstable operation is caused, operation accidents can be seriously caused, production is influenced, and great direct and indirect economic losses are caused. In order to solve the problem, the invention provides a material balance control method and a material balance control system for a flue gas purification system.
The following describes the material balance control method and system for a flue gas purification system in detail with reference to the accompanying drawings.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a material balance control method for a flue gas purification system according to an embodiment of the present invention. As can be seen from fig. 4, the material balance control method includes:
step 101, obtaining the working time of the automatic feeding push rod of each adsorption unit and the first working frequency of the circular roller unloading machine of each adsorption unit in a preset time period.
In the flue gas purification system (for example, the flue gas purification system shown in fig. 1) for purifying sintering flue gas, the flue gas purification system comprises a plurality of adsorption units, each adsorption unit is correspondingly provided with a material bin 7 (for example, an activated carbon bin), a feeding push rod 6 and a round roller unloader 5, materials conveyed by an absorption tower feeding conveyor 4 are sequentially unloaded into each adsorption unit according to the operation direction, and when the materials are unloaded into the adsorption units, the corresponding automatic feeding push rods work. After the unloading to one of the adsorption units is finished, the next automatic feeding push rod starts to work while the corresponding automatic feeding push rod finishes working, namely, the respective automatic feeding push rods do not work simultaneously, and only one automatic feeding push rod is in a working state at any moment. And repeating the circulation after the completion of one period by analogy. Wherein, the feeding push rod can adopt the automatic feed push rod entirely, and in order to guarantee when the automatic push rod trouble, the material that absorption tower feeding conveyer carried also can be unloaded, generally set up fixed feeding push rod at last absorption unit, fixed feeding push rod is in operating condition always.
In order to obtain the working time of each automatic feeding push rod of the adsorption units in the preset time period, a timer is arranged in the system and used for recording the working time of each automatic feeding push rod in the preset time period. In this embodiment, the current operating frequency of each adsorption unit circular roller unloader was recorded as the first operating frequency.
And 102, determining the actual feeding time of each adsorption unit according to the working time.
In the process of unloading to each adsorption unit by the absorption tower feeding conveyor, when the previous adsorption unit finishes unloading, the automatic feeding push rod of the next adsorption unit starts to work, but the material still needs an operation time from the previous adsorption unit to the next adsorption unit on the absorption tower feeding conveyor, so that the working time of the automatic feeding push rod of each adsorption unit obtained in the step 101 is not necessarily the actual feeding time of each adsorption unit, and the working time needs to be further corrected to obtain the effective working time of the feeding push rod corresponding to each adsorption unit, namely the actual feeding time of each adsorption unit.
In one embodiment, if the adsorption units are all provided with automatic feeding push rods, the working time of the first adsorption unit is equal to the actual blanking time of the first adsorption unit, the actual blanking time of the second adsorption unit is equal to the working time of the second adsorption unit minus the time of the material running from the first adsorption unit to the second adsorption unit on the feeding conveyor of the absorption tower, and the actual blanking time of the third adsorption unit to the last adsorption unit is calculated in a similar way.
The method for calculating the time of the material running from the previous adsorption unit to the next adsorption unit on the absorption tower feeding conveyor comprises the steps of obtaining the running speed of the absorption tower feeding conveyor and the distance between the previous adsorption unit and the next adsorption unit, and then calculating the corresponding running time according to the running speed and the distance between two adjacent adsorption units.
In the above embodiment, the first adsorption unit refers to an adsorption unit corresponding to the first unloading of the feeding conveyor of the absorption tower in an unloading period, similarly, the second adsorption unit refers to an adsorption unit corresponding to the second unloading, and the last adsorption unit refers to an adsorption unit corresponding to the last unloading.
In another embodiment, if the last adsorption unit is configured with the fixed feeding push rod and the other adsorption units are configured with the automatic feeding push rods, the method for calculating the actual blanking timing corresponding to the adsorption unit configured with the automatic feeding push rod is the same as the above embodiment, which is not described herein again, and the calculation of the actual feeding time of the adsorption unit corresponding to the fixed feeding push rod can be obtained by the difference between the total running time and the working time of the other adsorption units, where the total running time is the total time of the preset time period in step 101.
Theoretically, the feeding speed of each adsorption unit should be the same, and the actual feeding time of each corresponding adsorption unit should be the same, however, in actual implementation, the feeding amount of each adsorption unit may not be the same due to factors such as the structure of the round roller and installation errors, and therefore, step 103 needs to be performed.
103, if the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset first deviation threshold range, generating a second working frequency of the circular roller unloader of the adsorption unit according to the actual feeding time and the first working frequency of the adsorption unit.
After the actual feeding time of each adsorption unit is determined, firstly, a relative deviation value of the actual feeding time of each adsorption unit is generated, and the method specifically comprises the following steps: taking the following relational expression (1) as a preset relative deviation relational expression; using a preset relative deviation relationship, namely the following relationship (1), the relative deviation of the actual feed time to each adsorption unit was calculated:
Figure BDA0002255398150000051
in relation (1):
ai represents the relative deviation of the actual feed time of the ith adsorption unit;
ti represents the actual feed time of the ith adsorption unit;
x represents the average of the actual feed times to each adsorption unit.
The relational expression (1) is stored in the system in advance, and may be retrieved from the system at the time of calculation.
And if the relative deviation value of the actual feeding time of the adsorption unit does not meet the range of a preset first deviation threshold value, generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency.
And if the generated relative deviation value of the actual feeding time does not meet the preset first deviation threshold range, generating a second working frequency of the circular roller unloading machine corresponding to the adsorption unit according to the actual feeding time of the adsorption unit and the first working frequency of the adsorption unit.
Further, the generating of the second operating frequency of the circular roller unloader of the adsorption unit according to the actual feeding time and the first operating frequency specifically includes:
calculating the second working frequency according to the following relation (2) according to the actual feeding time and the first working frequency:
Figure BDA0002255398150000061
in relation (2):
m represents a first operating frequency;
m1 denotes a second operating frequency;
tn represents the actual feed time of the nth adsorption unit, and n is a positive integer greater than or equal to 1;
ti represents the actual feeding time of the ith adsorption unit, i is a positive integer of 1 or more, and i is n or less.
The relational expression (2) is stored in the system in advance, and may be retrieved from the system at the time of calculation.
And 104, adjusting the first working frequency of the circular roller unloading machine of the adsorption unit to a second working frequency.
And adjusting the first working frequency of the circular roller unloader of the adsorption unit with the relative deviation value of the actual feeding time not meeting the preset first deviation threshold range to be the second working frequency.
According to the relation (2), if Ti is larger than the average value, the current working frequency of the circular roller unloading machine of the corresponding adsorption unit, namely the first working frequency, needs to be reduced; on the contrary, if Ti is smaller than the average value, the current operating frequency of the circular roller unloader of the corresponding adsorption unit, i.e., the first operating frequency, needs to be increased so that the blanking amount of each adsorption unit tends to be equal.
Further, if the relative deviation value of the actual feeding time of the adsorption unit satisfies a preset first deviation threshold range, maintaining a first operating frequency of a circular roller unloader of the adsorption unit.
And repeatedly circulating the steps, and continuously adjusting the working frequency of each adsorption unit so as to enable the actual feeding time of each adsorption unit to be the same or tend to be the same, namely realizing that the material blanking amount of each adsorption unit is the same or tends to be the same, thereby solving the problems of material temperature runaway and unstable operation in the absorption tower caused by uneven blanking.
It should be further noted that, in the process of repeatedly cycling the above steps, the preset time of each time may be the same or different, and in order to record the working time, after the above cycling step is executed each time, the working time of the automatic feeding push rod of each adsorption unit may be reset to zero and re-timed.
Further, when the first operating frequency of the circular roller unloader of each adsorption unit is the same, if the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset second deviation threshold range, determining that the circular roller unloader of the adsorption unit is in an abnormal state.
The round roller unloading machine is arranged in each adsorption unit of the absorption tower, and when the round roller unloading machine operates, whether the round roller unloading machine is normal or not is difficult to judge. At present, only when a flue gas purification system is stopped and overhauled, the circular roller unloader can be manually fed into the absorption tower to check whether the circular roller unloader breaks down or not after the circular roller unloader is cooled in the absorption tower, for example, a baffle plate drops, and the material is blocked.
In this embodiment, when the first operating frequency of the circular roller unloader of each adsorption unit is the same, whether the operation of the circular roller unloader of each adsorption unit is normal is determined by the relative deviation value of the actual feeding time of each adsorption unit. And if the relative deviation value of the actual feeding time of the adsorption unit does not meet the preset second deviation threshold range, indicating that the circular roller unloading machine of the adsorption unit is abnormal in operation, and checking and adjusting the circular roller unloading machine corresponding to the adsorption unit. And if the relative deviation value of the actual feeding time of the adsorption unit meets a preset second deviation threshold value range, indicating that the circular roller unloading machine of the adsorption unit normally operates.
The second deviation threshold range may be the same as the first deviation threshold range, and in practice, the second deviation threshold range is generally larger than the first deviation threshold range.
Further, when the first working frequency of the circular roller unloader of each adsorption unit is the same, material flow parameters are determined according to the actual feeding time of the adsorption units, wherein the material flow parameters are used for judging the material flow state of the whole adsorption unit. The method specifically comprises the following steps:
calculating the stream parameter from the actual feed time to the adsorption unit according to the following relation (3):
Figure BDA0002255398150000071
in the relation (3), the first and second groups,
x represents the average of the actual feed times;
tn represents the actual feed time of the nth adsorption unit, and n is a positive integer greater than or equal to 1;
y represents a stream parameter.
In this embodiment, the relationship (3) is used to determine the material flow parameter, and the material flow parameter can reflect the blanking uniformity of the whole adsorption unit, that is, the whole absorption tower, and can be used to determine the material flow state of the whole adsorption unit. This embodiment can be used to evaluate the material flow states of different absorption towers, for example, the material flow parameters of two sets of absorption towers are calculated respectively by using the above relation (3), and the material flow states of two sets of absorption towers are evaluated according to the calculated material flow parameter results. The smaller the material flow parameter value is, the more uniform the blanking of the corresponding absorption tower is, and the material flow state is better.
In the material balance control method for the flue gas purification system, provided by the embodiment of the invention, the working time of an automatic feeding push rod of each adsorption unit and the first working frequency of a circular roller unloader of each adsorption unit in a preset time period are obtained; determining the actual feeding time of each adsorption unit according to the working time; if the relative deviation value of the actual feeding time of the adsorption unit does not meet the range of a preset first deviation threshold value, generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency; and adjusting the first working frequency of the circular roller unloading machine of the adsorption unit to be a second working frequency. And if the relative deviation value of the actual feeding time of the adsorption unit meets a preset first deviation threshold range, maintaining a first working frequency of a circular roller unloader of the adsorption unit. The working frequency of the circular roller unloader of each adsorption unit is adjusted by utilizing the working time of the feeding push rod of each adsorption unit, so that the accurate control of the blanking amount of each adsorption unit is realized, the blanking amount of each adsorption unit tends to be consistent, the material temperature runaway in the absorption tower is effectively avoided, and the stable operation of the system is ensured.
Corresponding to the material balance control method for the flue gas purification system, the embodiment of the invention also discloses a material balance control system for the flue gas purification system.
Referring to fig. 5, fig. 5 is a block diagram illustrating a material balance control system for a flue gas purification system according to an embodiment of the present invention. As can be seen from fig. 5, the material balance control system includes:
the acquisition module 201 is used for acquiring the working time of the feeding push rod of each adsorption unit and the first working frequency of the round roller unloading machine within a preset time period;
a first determining module 202 for determining an actual feed time for each of the adsorption units based on the on-time;
the generating module 203 is configured to generate a second operating frequency of the circular roller unloader of the adsorption unit according to the actual feeding time and the first operating frequency of the adsorption unit when the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset first deviation threshold range;
and the adjusting module 204 is configured to adjust the first working frequency of the circular roller unloader of the adsorption unit to a second working frequency.
Further, this material balance control system still includes:
and the maintaining module is used for maintaining the first working frequency of the circular roller unloader of the adsorption unit when the relative deviation value of the actual feeding time of the adsorption unit meets a preset first deviation threshold range.
Further, this material balance control system still includes:
and the second determining module is used for determining that the circular roller unloader of the adsorption unit is in an abnormal state when the first working frequency of the circular roller unloader of each adsorption unit is the same and the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset second deviation threshold range.
Further, this material balance control system still includes:
and the third determining module is used for determining material flow parameters according to the actual feeding time of the adsorption units when the first working frequency of the circular roller unloading machine of each adsorption unit is the same, wherein the material flow parameters are used for judging the material flow state of the whole adsorption unit.
The material balance control system for the flue gas purification system provided by the embodiment of the invention can implement the steps in the material balance control system method for the flue gas purification system and obtain the same technical effect. By adopting the system, the working frequency of the circular roller unloader of each adsorption unit is adjusted by utilizing the working time of the feeding push rod of each adsorption unit, so that the accurate control of the blanking amount of each adsorption unit is realized, the blanking amount of each adsorption unit tends to be consistent, the material flying temperature in the absorption tower is effectively avoided, and the stable operation of the system is ensured.
In specific implementation, the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in each embodiment of the material balance control method for a flue gas purification system provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, as for the embodiment of the supplementary device for activated carbon in a flue gas purification device, since it is basically similar to the embodiment of the method, the description is simple, and the relevant points can be referred to the description in the embodiment of the method.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.

Claims (10)

1. A material balance control method for a flue gas purification system is characterized by comprising the following steps:
acquiring the working time of an automatic feeding push rod of each adsorption unit and the first working frequency of a circular roller unloader of each adsorption unit in a preset time period;
determining the actual feeding time of each adsorption unit according to the working time;
if the relative deviation value of the actual feeding time of the adsorption unit does not meet the range of a preset first deviation threshold value, generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency of the adsorption unit;
and adjusting the first working frequency of the circular roller unloading machine of the adsorption unit to be a second working frequency.
2. The material balance control method according to claim 1, further comprising:
and if the relative deviation value of the actual feeding time of the adsorption unit meets a preset first deviation threshold range, maintaining a first working frequency of a circular roller unloader of the adsorption unit.
3. The material balance control method according to claim 1, further comprising:
and if the first working frequency of the circular roller unloader of each adsorption unit is the same and the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset second deviation threshold range, determining that the circular roller unloader of the adsorption unit is in an abnormal state.
4. The material balance control method according to claim 1, further comprising:
and if the first working frequency of the circular roller unloader of each adsorption unit is the same, determining material flow parameters according to the actual feeding time of the adsorption unit, wherein the material flow parameters are used for judging the material flow state of the whole adsorption unit.
5. The material balance control method according to claim 4, wherein determining stream parameters based on the actual feed time of the adsorption unit comprises:
calculating the material flow parameter according to the actual feeding time of the adsorption unit according to the following relational expression:
Figure FDA0002255398140000011
wherein x represents the average of the actual feed times, Tn represents the actual feed time of the nth adsorption unit, n is a positive integer greater than or equal to 1, and y represents a stream parameter.
6. The material balance control method according to claim 1, wherein the generating of the second operating frequency of the circular roller unloader of the adsorption unit according to the actual feeding time and the first operating frequency of the adsorption unit specifically comprises:
calculating the second working frequency according to the actual feeding time and the first working frequency of the adsorption unit and the following relational expression:
Figure FDA0002255398140000021
wherein M1 represents the second operating frequency, M represents the first operating frequency, Tn represents the actual feed time of the nth adsorption unit, Ti represents the actual feed time of the ith adsorption unit, n is a positive integer greater than or equal to 1, i is a positive integer greater than or equal to 1, and i is less than or equal to n.
7. A material balance control system for a flue gas cleaning system, comprising:
the acquisition module is used for acquiring the working time of the feeding push rod of each adsorption unit and the first working frequency of the round roller unloading machine in a preset time period;
a first determining module for determining the actual feed time of each adsorption unit according to the working time;
the generating module is used for generating a second working frequency of the circular roller unloading machine of the adsorption unit according to the actual feeding time and the first working frequency of the adsorption unit when the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset first deviation threshold range;
and the adjusting module is used for adjusting the first working frequency of the circular roller unloading machine of the adsorption unit to be a second working frequency.
8. The material balance control system of claim 7, further comprising:
and the maintaining module is used for maintaining the first working frequency of the circular roller unloader of the adsorption unit when the relative deviation value of the actual feeding time of the adsorption unit meets a preset first deviation threshold range.
9. The material balance control system of claim 7, further comprising:
and the second determining module is used for determining that the circular roller unloader of the adsorption unit is in an abnormal state when the first working frequency of the circular roller unloader of each adsorption unit is the same and the relative deviation value of the actual feeding time of the adsorption unit does not meet a preset second deviation threshold range.
10. The material balance control system of claim 7, further comprising:
and the third determining module is used for determining material flow parameters according to the actual feeding time of the adsorption units when the first working frequency of the circular roller unloading machine of each adsorption unit is the same, wherein the material flow parameters are used for judging the material flow state of the whole adsorption unit.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5871564A (en) * 1997-06-16 1999-02-16 Airsep Corp Pressure swing adsorption apparatus
CN103055661A (en) * 2012-12-31 2013-04-24 东南大学 Device and method for removing acidic gas from smoke at high temperature
CN108057314A (en) * 2018-01-29 2018-05-22 中冶华天南京电气工程技术有限公司 Activated coke dry flue gas desulphurization denitrating technique adsorption tower tower method for controlling temperature inner
CN108434936A (en) * 2018-06-06 2018-08-24 中冶长天国际工程有限责任公司 A kind of material balance control method and device for flue gas purification system
CN108554115A (en) * 2018-01-29 2018-09-21 中冶长天国际工程有限责任公司 A kind of flue gas purification system and its control method being related to multi-process
CN108861643A (en) * 2017-05-12 2018-11-23 中冶长天国际工程有限责任公司 A kind of automatic uniform unloading control method and device
CN109821343A (en) * 2017-11-23 2019-05-31 中冶长天国际工程有限责任公司 A kind of compensation process and device for active carbon in flue gas purification device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5871564A (en) * 1997-06-16 1999-02-16 Airsep Corp Pressure swing adsorption apparatus
CN103055661A (en) * 2012-12-31 2013-04-24 东南大学 Device and method for removing acidic gas from smoke at high temperature
CN108861643A (en) * 2017-05-12 2018-11-23 中冶长天国际工程有限责任公司 A kind of automatic uniform unloading control method and device
CN109821343A (en) * 2017-11-23 2019-05-31 中冶长天国际工程有限责任公司 A kind of compensation process and device for active carbon in flue gas purification device
CN108057314A (en) * 2018-01-29 2018-05-22 中冶华天南京电气工程技术有限公司 Activated coke dry flue gas desulphurization denitrating technique adsorption tower tower method for controlling temperature inner
CN108554115A (en) * 2018-01-29 2018-09-21 中冶长天国际工程有限责任公司 A kind of flue gas purification system and its control method being related to multi-process
CN108434936A (en) * 2018-06-06 2018-08-24 中冶长天国际工程有限责任公司 A kind of material balance control method and device for flue gas purification system

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