CN111442262B - Slag removal adjusting system and method - Google Patents

Slag removal adjusting system and method Download PDF

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Publication number
CN111442262B
CN111442262B CN202010238862.3A CN202010238862A CN111442262B CN 111442262 B CN111442262 B CN 111442262B CN 202010238862 A CN202010238862 A CN 202010238862A CN 111442262 B CN111442262 B CN 111442262B
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adjusting
slag
parameter
slag cooler
coefficient
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CN111442262A (en
Inventor
佟春海
佟润东
张砺刚
冀树芳
宋天阳
李鹏
郭瑞
李涛
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Shenhua Shendong Power Co Ltd
Guojiawan Power Plant of Shenhua Shendong Power Co Ltd
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Shenhua Shendong Power Co Ltd
Guojiawan Power Plant of Shenhua Shendong Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/24—Devices for removal of material from the bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F23J1/06—Mechanically-operated devices, e.g. clinker pushers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
    • G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P.I., P.I.D.
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means

Abstract

The disclosure relates to a deslagging adjusting system and a deslagging adjusting method, which are applied to a circulating fluidized bed boiler and relate to the technical field of automatic control. In the slag removal adjusting system, an adjusting parameter operation circuit calculates and obtains system adjusting parameters according to input actually measured pressure values of the water cooling air chamber and the operation modes of the slag coolers; each adjusting coefficient operation branch circuit calculates to obtain a system adjusting coefficient according to the input temperature value and the input humidity value of the slag cooler; the main control equipment stores the received system adjusting parameters and outputs the system adjusting parameters at the current moment and the last moment to the slag cooler adjusting circuit; the slag cooler adjusting circuit selects a target adjusting parameter from the system adjusting parameters at the current moment and the last moment according to the input system adjusting coefficient to determine the adjusting sub-parameter, and correspondingly adjusts each slag cooler according to the adjusting sub-parameter, so that the slag coolers are automatically adjusted, and the adjusting precision is improved.

Description

Slag removal adjusting system and method
Technical Field
The disclosure relates to the technical field of automatic control, in particular to a deslagging adjusting system and a deslagging adjusting method.
Background
A 1065t/h double-bed circulating fluidized bed boiler, which is an apparatus for generating steam by heating water through combustion of fuel, has two air distribution plates (beds) and generates 1065 tons of steam per hour in a rated operation, and such a boiler is generally used in a power plant. At present, during the operation of a deslagging system of a 1065t/h double-bed circulating fluidized bed boiler, the pressure of a water-cooling air chamber is controlled by manually adjusting the rotating speed of a slag cooler by operators, but the manual adjustment has the problems of inaccurate adjustment, high labor intensity and the like.
Disclosure of Invention
The utility model provides a deslagging adjusting system and method, which can realize the automatic adjustment of the deslagging system and has high adjustment precision.
The technical scheme of the disclosure is as follows:
according to a first aspect of the embodiments of the present disclosure, a slag removal regulating system is provided, which is applied to a circulating fluidized bed boiler, the circulating fluidized bed boiler includes a water cooling chamber and a plurality of slag coolers, the system includes a main control device, a regulating parameter operation circuit, regulating coefficient operation branches corresponding to the slag coolers one by one, and slag cooler regulating circuits; the main control equipment is respectively connected with the output end of the adjusting parameter operation circuit and the first input end of each slag cooler adjusting circuit, the second input end of each slag cooler adjusting circuit is respectively correspondingly connected with the output end of each adjusting coefficient operation branch, and the output end of each slag cooler is correspondingly connected with each slag cooler; the adjusting parameter operation circuit is used for calculating and obtaining system adjusting parameters according to an input actual measurement pressure value of the water cooling air chamber and the operation mode of each slag cooler; each adjusting coefficient operation branch is used for calculating to obtain a system adjusting coefficient according to the input temperature value and the input humidity value of the slag cooler; the main control equipment is used for storing the received system adjusting parameters and outputting the system adjusting parameters at the current moment and the previous moment to the slag cooler adjusting circuit; and the slag cooler adjusting circuit is used for selecting a target adjusting parameter from the system adjusting parameters at the current moment and the last moment according to the input system adjusting coefficient to determine an adjusting sub-parameter, and correspondingly adjusting each slag cooler according to the adjusting sub-parameter.
Optionally, as a possible implementation manner, the adjustment parameter operation circuit includes a deviation operation module, a proportionality coefficient selector, an integration time selector, and an adjuster; three input ends of the regulator are respectively connected with the output end of the deviation operation module, the output end of the proportional coefficient selector and the output end of the integral time selector, and the output end of the regulator is connected with the main control equipment; the deviation operation module is used for calculating a difference value between an input actually measured pressure value of the water-cooling air chamber and a preset pressure value; the proportionality coefficient selector is used for selecting a target proportionality coefficient corresponding to an input operation mode of each slag cooler; the integral time selector is used for selecting target integral time corresponding to the operation mode according to the input operation mode of each slag cooler; and the regulator is used for calculating to obtain the system regulating parameter according to the difference value, the target proportionality coefficient and the target integration time.
Optionally, as a possible implementation manner, the system adjustment parameter is
Figure BDA0002431891860000021
Wherein k ispIs the scale factor, E is the difference, TiFor the target integration time, TdFor presetting a differential time, kdIs a preset differential coefficient.
Optionally, as a possible implementation manner, the scaling factor selector and the integration time selector are three-to-one selectors.
Optionally, as a possible implementation manner, the slag cooler adjusting circuit includes a humidity comparator, a temperature comparator and a logic arithmetic unit; and two input ends of the logic arithmetic unit are respectively connected with the output end of the temperature comparator and the output end of the humidity comparator, and the output ends of the logic arithmetic unit are connected with the input end of the slag cooler adjusting circuit.
Optionally, as a possible implementation manner, the slag cooler adjusting circuit includes a parameter selector and a slag cooler adjuster; the input end of the parameter selector is connected with the output end of the logic arithmetic unit, the output end of the parameter selector is connected with the slag cooler regulator, and the slag cooler regulator is also connected with the corresponding slag cooler; when the system adjusting coefficient output by the logic arithmetic unit represents that at least one of the temperature value and the temperature value exceeds a preset value, the parameter selector is used for determining an adjusting sub-parameter according to the system adjusting parameter at the previous moment, and the slag cooler adjuster is used for adjusting the slag cooler according to the adjusting sub-parameter.
Optionally, as a possible implementation manner, the parameter selector is an alternative selector.
Optionally, as a possible implementation manner, the main control device is further configured to receive and respond to an adjustment mode selection operation triggered by a user, and execute the step of outputting the system adjustment parameters at the current time and the previous time to the slag cooler adjustment circuit when the selected adjustment mode is a target adjustment mode.
According to a first aspect of the embodiments of the present disclosure, there is provided a slag removal control method applied to the slag removal control system according to any one of claims 1 to 8, the method including: the adjusting parameter operation circuit calculates and obtains system adjusting parameters according to the received actually measured pressure value of the water cooling air chamber and the operation mode of each slag cooler; each adjusting coefficient operation branch circuit calculates to obtain a system adjusting coefficient according to the received temperature value and the received humidity value of the corresponding slag cooler; the system adjusting parameters received by the main control equipment are stored, and the system adjusting parameters at the current moment and the last moment are sent to the corresponding slag cooler adjusting circuits; and each slag cooler adjusting circuit selects a target adjusting parameter from the system adjusting parameters at the current moment or the previous moment according to the input system adjusting coefficient to determine an adjusting sub-parameter, and adjusts the corresponding slag cooler according to the adjusting sub-parameter.
Optionally, as a possible implementation manner, the method further includes: and the main control equipment receives and responds to the adjustment mode selection operation of the user, and executes the step of sending the system adjustment parameters at the current moment and the previous moment to the corresponding slag cooler adjustment circuit under the condition that the selected adjustment mode is the target adjustment mode.
The embodiment of the present disclosure adopts at least one technical scheme that can achieve the following beneficial effects:
according to the slag removal adjusting system and method, the corresponding adjusting sub-parameters of each slag cooler can be obtained according to the actually measured pressure value of the water cooling air chamber, the operation mode of each slag cooler and the temperature value and humidity value of each slag cooler, and then each slag cooler is automatically adjusted according to the adjusting sub-parameters, so that the adjusting precision is improved, and the labor cost is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
FIG. 1 is a diagram of a deslagging process system for a dual-cycle sulfiding boiler, shown in accordance with an exemplary embodiment.
FIG. 2 is a block diagram illustrating a slag removal adjustment system according to an exemplary embodiment.
FIG. 3 is a block diagram illustrating a slag removal adjustment system according to another exemplary embodiment.
FIG. 4 is a flow diagram illustrating a method of adjusting slag removal according to an exemplary embodiment.
In order to make the technical solutions of the present disclosure better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the disclosure described herein are capable of operation in sequences other than those illustrated or otherwise described herein. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The technical solutions provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, there is shown a schematic structural diagram of a dual-bed circulating fluidized bed boiler using the slag removal regulating system and method of the present embodiment, the dual-bed circulating fluidized bed boiler is a boiler having two air distribution plates (beds) capable of generating 1065 tons of steam per hour when operating at a rated operation, and therefore, may be referred to as 1065t/h dual-bed circulating fluidized bed boiler, which is generally used in power plants and the like.
The 1065t/h double-bed circulating fluidized bed boiler is equipped with a deslagging system which is used for discharging ash slag generated by fuel combustion in a hearth and conveying the ash slag to a slag bin after cooling the ash slag. Specifically, referring again to fig. 1, ash generated by combustion of fuel in the furnace is deposited on beds (left and right beds as shown in fig. 1), and the ash on the beds flows out to the slag cooler through the slag discharge pipe, is cooled in the slag cooler and then is discharged, and is conveyed to the slag bin through the bucket chain machine and the bucket elevator.
A deslagging system in a 1065t/h double-bed circulating fluidized bed boiler is provided with 6 variable-frequency slag coolers, the slag discharge amount can be increased or reduced by adjusting the rotating speed of the variable-frequency slag coolers in the operation process, the pressure of a water cooling air chamber is further adjusted within an allowable range, and the slag discharging temperature of the slag coolers and the water outlet temperature of the slag coolers can be prevented from exceeding the limit. At present, in the operation process of a deslagging system, the pressure of a water cooling air chamber is controlled mainly by manually adjusting the rotating speed of a slag cooler by workers, so that the problems of inaccurate adjustment result, high labor intensity, electricity consumption, poor safety and stability and the like are caused.
In view of this, the present embodiment provides a slag removal adjustment system and method to achieve automatic adjustment of a slag cooler and ensure accuracy of an adjustment result, and the following describes a technical solution provided in the present embodiment.
Referring to fig. 2, a block diagram of the slag removal regulating system 20 of the present embodiment is shown, wherein the slag removal regulating system 20 can be applied to a circulating fluidized bed boiler, such as the 1065t/h dual-bed circulating fluidized bed boiler shown in fig. 1. The circulating fluidized bed boiler comprises a water-cooling air chamber and a plurality of slag coolers, and the slag removal adjusting system 20 can comprise a main control device 21, an adjusting parameter operation circuit 22, an adjusting coefficient operation branch 23 corresponding to the slag coolers one by one, and a slag cooler adjusting circuit 24.
The main control device 21 is connected to the output end of the parameter adjusting arithmetic circuit 22 and the first input end of each slag cooler adjusting circuit 24, the second input end of each slag cooler adjusting circuit 24 is correspondingly connected to the output end of each adjusting coefficient arithmetic branch 23, and the output end of each slag cooler adjusting circuit 24 is used for being correspondingly connected to each slag cooler.
The adjusting parameter calculating circuit 22 is configured to calculate and obtain a system adjusting parameter according to an input actually measured pressure value of the water cooling air chamber and an operation mode of each slag cooler. The operation mode in this embodiment refers to whether each slag cooler is in the automatic adjustment mode or the manual adjustment mode, for example, if there are three slag coolers, the operation mode of each slag cooler may be represented by "100" when there is one slag cooler in the automatic adjustment mode, the operation mode of each slag cooler may be represented by "010" when there are two slag coolers in the automatic adjustment mode, and the operation mode of each slag cooler may be represented by "001" when there are three slag coolers in the automatic adjustment mode. In practical applications, the expression mode of the operation mode output by the adjustment parameter operation circuit 22 can be flexibly designed according to different actual requirements, which is not limited in this embodiment.
In addition, when calculating the system adjustment parameter, a preset pressure value corresponding to the measured pressure value may be preset in the slag removal adjustment system 20, so that the system adjustment parameter is calculated based on the preset pressure value and the measured pressure value, the pressure value of the water cooling air chamber is ensured to be within a safe range, and the safety of the system during operation is improved. It should be noted that, according to different actual requirements, the circuit form of the adjustment parameter operation circuit 22 is different, and this embodiment is not limited to this.
And each adjusting coefficient operation branch 23 is used for calculating and obtaining a system adjusting coefficient according to the input temperature value and the input humidity value of the slag cooler. Optionally, each adjustment coefficient operation branch 23 is designed to mainly ensure that when the slag cooler is adjusted, the slag discharging temperature of the slag cooler and the water discharging temperature of the slag cooler are prevented from exceeding the limits, so that a temperature threshold and a humidity threshold can be preset in the slag removal adjustment system 20, and when the temperature value of the slag cooler exceeds the temperature threshold or/and the humidity value exceeds the humidity threshold, a first system adjustment coefficient is output; and otherwise, when the temperature value of the slag cooler does not exceed the temperature threshold value and the humidity value does not exceed the humidity threshold value, outputting a second system adjusting coefficient. The actual content of the first system adjustment coefficient and the second system adjustment coefficient is not limited in this embodiment, for example, the first system adjustment coefficient may be a high level, the second system adjustment coefficient may be a low level, and the like.
The main control device 21 is used for storing the received system adjusting parameters and outputting the system adjusting parameters at the current time and the last time to the slag cooler adjusting circuit 24. Optionally, in order to avoid waste of storage resources, the main control device 21 may only store the system adjustment parameters within a preset time, so that the slag cooler adjustment circuit 24 can select the target adjustment parameters according to the received system adjustment coefficients. Alternatively, the main Control device 21 may be, but is not limited to, a DCS (Distributed Control System) or a PLC (Programmable Logic Controller).
The slag cooler adjusting circuit 24 is configured to select a target adjusting parameter from the system adjusting parameters at the current time and the last time according to the input system adjusting coefficient to determine an adjusting sub-parameter, and correspondingly adjust each slag cooler according to the adjusting sub-parameter, such as adjusting the rotating speed. Optionally, the system adjustment coefficient may include a first system adjustment coefficient and a second system adjustment coefficient, and when the first system adjustment coefficient indicates that the temperature value of the slag cooler exceeds the temperature threshold or/and the humidity value exceeds the humidity threshold, the system adjustment parameter at the last moment may be selected as a target adjustment parameter, and one half or one third of the target adjustment parameter is used as an adjustment sub-parameter to reduce the rotation speed of the slag cooler, so that the temperature value of the slag cooler does not exceed the temperature threshold or/and the humidity value does not exceed the humidity threshold, thereby ensuring safe operation of the system. And on the contrary, when the temperature value of the second system regulating coefficient representation slag cooler does not exceed the temperature threshold and the humidity value does not exceed the humidity threshold, the system regulating parameter at the current moment is selected as the target regulating parameter so as to regulate the rotating speed of the slag cooler.
It should be understood that the slag cooler regulating circuit 24, the system regulating coefficient, etc. can be flexibly designed according to actual requirements, and the present embodiment is not limited thereto,
in the slag removal adjusting system 20, the adjusting sub-parameters corresponding to the slag coolers can be obtained according to the actually measured pressure values of the water cooling air chamber, the operation modes of the slag coolers and the temperature values and the humidity values of the slag coolers, and then the slag coolers can be automatically adjusted according to the adjusting sub-parameters, so that the adjusting efficiency and the adjusting precision are effectively improved, the labor cost is reduced, and the safe operation of the system is ensured.
Referring to fig. 3, a block diagram of a slag removal regulating system 30 according to another embodiment of the present disclosure is shown, wherein the slag removal regulating system 30 may be applied to a circulating fluidized bed boiler, such as the 1065t/h dual-bed circulating fluidized bed boiler shown in fig. 1. The circulating fluidized bed boiler comprises a water-cooling air chamber and a plurality of slag coolers, and the slag removal adjusting system 30 can comprise a main control device 31, an adjusting parameter operation circuit 32, an adjusting coefficient operation branch 33 corresponding to the slag coolers one by one, and a slag cooler adjusting circuit 34.
In one implementation, referring again to fig. 3, the adjustment parameter calculation circuit 32 may include at least a deviation calculation module 320, a scaling factor selector 321, an integration time selector 322, and an adjuster 323. Three input ends of the regulator 323 are respectively connected to the output end of the deviation operation module 320, the output end of the scaling coefficient selector 321, and the output end of the integration time selector 322, and the output end is connected to the main control device 31.
The deviation operation module 320 is configured to calculate a difference between an input actually measured pressure value of the water cooling plenum and a preset pressure value. As shown in fig. 3, the deviation calculating module 320 may be a differential calculator, and two input ends S1 and S2 of the differential calculator are respectively used for inputting the measured pressure value and the preset pressure value, and an output end of the differential calculator is used for inputting the calculated difference value to the regulator 323. The preset pressure value can be designed according to the actual working condition of the circulating fluidized bed boiler, and the embodiment is not limited herein.
The scaling factor selector 321 is configured to select a target scaling factor corresponding to an input operation mode of each slag cooler according to the input operation mode. The integral time selector 322 is used for selecting the target integral time corresponding to the operation mode according to the input operation mode of each slag cooler.
Alternatively, the scaling factor selector 321 and the integration time selector 322 may be of different types depending on the dual cycle sulfiding boiler to which the slag removal regulation system 30 is applied. For example, assuming that the dual-cycle vulcanizing boiler has three slag coolers for each bed as shown in fig. 1, the scaling factor selector 321 and the integration time selector 322 may be three-to-one selectors as shown in fig. 3, taking three slag coolers for the left bed as an example, and in this embodiment, the implementation principle of the scaling factor selector 321 and the integration time selector 322 is the same.
As an implementation manner, taking the scaling factor selector 321 as an example, please refer to fig. 3 again, in which the scaling factor selector 321 includes three operation mode inputs S1, S2, and S3, and preset scaling factor inputs P0, P1, P2, and P3 corresponding to S1, S2, and S3. In practical applications, when the operation mode of one of the three slag coolers is the automatic adjustment mode, the input value of S1 is 1, the input value of S2 is 0, and the input value of S3 is 0, then the target scaling factor selected according to the input "100" may be P1.
When the operation mode of two of the three slag coolers is the automatic adjustment mode, the input value of S1 is 0, the input value of S2 is 1, and the input value of S3 is 0, then the target scaling factor selected according to the input "010" may be P2.
When the operation modes of the three slag coolers are all the automatic adjusting modes, the input value of S1 is 0, the input value of S2 is 0, and the input value of S3 is 1, then the target proportionality coefficient selected according to the input '001' can be P3.
When the automatic regulation mode does not exist in the operation modes of the three slag coolers, the input value of S1 is 0, the input value of S2 is 0, and the input value of S3 is 0, then the target proportionality coefficient selected according to the input '000' may be P0.
It should be noted that the aforementioned preset proportionality coefficients P0, P1, P2 and P3 or the preset integration time in the integration time selector 322 can be set according to actual requirements, for example, the preset proportionality coefficients P0, P1, P2 and P3 can be respectively 0.8, 0.7 and 0.6, and the preset integration times P0, P1, P2 and P3 can be respectively 40, 55 and 70. In addition, in practical applications, the number of pins on the scaling factor selector 321 and the integration time selector 322 is different according to the number of slag coolers, and this embodiment does not specifically limit this.
The regulator 323 is used for calculating and obtaining a system regulating parameter according to the difference, the target proportionality coefficient and the target integration time. Alternatively, regulator 323 may be selected from, but not limited to, a pneumatic power regulator, or the like. In one implementation, the system tuning parameter may be
Figure BDA0002431891860000091
Wherein k ispIs a target scale factor, E is a difference, TiFor the target integration time, TdFor presetting a differential time, kdThe preset differential coefficient is designed according to the size of the furnace, the size of the water-cooling air chamber, the thickness of the bed layer, the type of coal, and the like, and for example, the preset differential time and the preset differential coefficient may be 50, 0.05, and the like, which is not limited in this embodiment.
Further, referring again to fig. 3, the slag cooler regulating circuit 34 may include a humidity comparator 332, a temperature comparator 331, and a logic operator 333. The input end of the logic arithmetic unit 333 is connected with the output end of the temperature comparator 331 and the output end of the humidity comparator 332 respectively, and the output end is connected with the input end of the slag cooler regulating circuit 34. The humidity comparator 332 and the temperature comparator 331 can be comparators having two input terminals (1 and 2 shown in fig. 3) and one output terminal. In practical applications, the humidity comparator 332 can output 0 or 1 according to the input humidity value of the slag cooler and the humidity threshold, where 0 indicates that the humidity value does not exceed the humidity threshold, and 1 indicates that the humidity value exceeds the humidity threshold. The temperature comparator 331 can output 0 or 1 according to the input temperature value of the slag cooler and the temperature threshold value, wherein 0 indicates that the temperature value does not exceed the temperature threshold value, and 1 indicates that the temperature value exceeds the temperature threshold value.
The logic operator 333 is configured to perform an or operation according to the output results of the humidity comparator 332 and the temperature comparator 331, and output the operation result to the slag cooler regulating circuit 34, where the operation result may be 0 or 1, where 1 indicates that the temperature value exceeds the temperature threshold or/and the humidity value exceeds the humidity threshold, and 0 indicates that the temperature value does not exceed the temperature threshold and the humidity value does not exceed the humidity threshold.
In one possible implementation, referring again to fig. 3, the slag cooler adjustment circuit 34 may include a parameter selector 341 and a slag cooler adjuster 342. The input end of the parameter selector 341 is connected with the output end of the logic arithmetic unit 333 and the main control device 31 respectively, the output end is connected with the slag cooler adjuster 342, and the slag cooler adjuster 342 is also connected with the corresponding slag cooler.
When at least one of the characteristic temperature value and the temperature value of the system adjustment coefficient output by the logic arithmetic unit 333 exceeds a preset value (such as a temperature threshold value or/and a humidity threshold value), the parameter selector 341 is configured to determine an adjustment sub-parameter according to the system adjustment parameter at the previous moment, and the slag cooler adjuster 342 is configured to adjust the slag cooler according to the adjustment sub-parameter. Optionally, the parameter selector 341 is an alternative selector, for example, two input terminals X1 and X2 of the parameter selector 341 are respectively used for inputting the system adjusting parameter at the current time and the system adjusting parameter at the previous time.
In practical applications, when at least one of the characteristic temperature value and the temperature value of the system regulation coefficient exceeds a preset value, the parameter selector 341 may select a half or a third of the system regulation parameter before the slag cooler is over-heated or over-wetted (i.e., the system regulation parameter at the previous time), as a regulator sub-parameter, so that the slag cooler regulator 342 regulates the rotation speed of the slag cooler according to the regulator sub-parameter. It should be noted that the slag cooler regulator is not related to the inventive point of the present disclosure, and reference may be made to the description of the slag cooler regulator in the existing dual cycle fluidized bed boiler, and the embodiment is not described here.
In addition, in order to further improve the operation convenience of the slag removal regulating system 30, the main control device 31 is further configured to receive and respond to a regulating mode selection operation triggered by a user, and perform the step of outputting the system regulating parameters at the current time and the previous time to the slag cooler regulating circuit 34 in the case that the selected regulating mode is the target mode.
Alternatively, the user may perform the triggering of the adjustment mode selection operation through a human-computer interface provided on the main control device 31, where the adjustment mode may be a manual adjustment mode or an automatic adjustment mode. When the target mode is the automatic adjustment mode, the system adjustment parameters output to the slag cooler adjustment circuit 34 by the main control device 31 are obtained based on the system adjustment parameter operation circuit 32, and when the target mode is the manual adjustment mode, the system adjustment parameters output to the slag cooler adjustment circuit 34 by the main control device 31 are data manually input by a user.
In the slag removal regulating system 30 provided by the embodiment, the efficient and accurate regulation of each slag cooler can be realized through the ingenious design of each circuit module in the slag removal regulating system 30, and the stability in the operation process of the boiler is improved.
As shown in fig. 4, another exemplary embodiment of the present embodiment further provides a slag removal control method, which is applied to the aforementioned slag removal control system, and the method includes the following steps.
And S410, calculating by the adjusting parameter operation circuit according to the received actually measured pressure value of the water cooling air chamber and the operation mode of each slag cooler to obtain system adjusting parameters, and inputting the system adjusting parameters into the main control equipment for storage.
And S420, calculating by each adjusting coefficient operation branch according to the received temperature value and humidity value of the corresponding slag cooler to obtain a system adjusting coefficient.
And S430, the main control equipment stores the received system adjusting parameters and sends the system adjusting parameters at the current moment and the last moment to the corresponding slag cooler adjusting circuits.
And S440, each slag cooler adjusting circuit selects a target adjusting parameter from the system adjusting parameters at the current moment or the previous moment according to the input system adjusting coefficient to determine an adjusting sub-parameter, and adjusts the corresponding slag cooler according to the adjusting sub-parameter.
Further, as a possible implementation manner, the slag removal adjusting method may further include: and the main control equipment receives and responds to the adjustment mode selection operation of the user, and executes the step of sending the system adjustment parameters at the current moment and the previous moment to the corresponding slag cooler adjustment circuit under the condition that the selected adjustment mode is the target mode.
It should be noted that, since the implementation process of the slag removal adjustment method in this embodiment has the same or corresponding technical features as the implementation process of the slag removal adjustment system, the detailed description of the slag removal adjustment method may refer to the description of the slag removal adjustment system, and the detailed description of this embodiment is not repeated.
In the slag removal adjusting method provided by the embodiment, the adjustment sub-parameters for adjusting each slag cooler can be obtained according to the obtained actually measured pressure value of the water cooling air chamber, the operation mode of each slag cooler and the temperature value and humidity value of each slag cooler, so that the adjusting precision is improved, and the labor cost is reduced.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

Claims (10)

1. A deslagging adjustment system is characterized by being applied to a circulating fluidized bed boiler, wherein the circulating fluidized bed boiler comprises a water-cooling air chamber and a plurality of slag coolers, and the system comprises a master control device, an adjustment parameter operation circuit, adjustment coefficient operation branches and slag cooler adjustment circuits, wherein the adjustment coefficient operation branches correspond to the slag coolers one by one;
the main control equipment is respectively connected with the output end of the adjusting parameter operation circuit and the first input end of each slag cooler adjusting circuit, the second input end of each slag cooler adjusting circuit is respectively correspondingly connected with the output end of each adjusting coefficient operation branch, and the output end of each slag cooler is correspondingly connected with each slag cooler;
the adjusting parameter operation circuit is used for calculating and obtaining system adjusting parameters according to an input actual measurement pressure value of the water cooling air chamber and the operation mode of each slag cooler; each adjusting coefficient operation branch is used for calculating to obtain a system adjusting coefficient according to the input temperature value and the input humidity value of the slag cooler; the main control equipment is used for storing the received system adjusting parameters and outputting the system adjusting parameters at the current moment and the previous moment to the slag cooler adjusting circuit; and the slag cooler adjusting circuit is used for selecting a target adjusting parameter from the system adjusting parameters at the current moment and the last moment according to the input system adjusting coefficient to determine an adjusting sub-parameter, and correspondingly adjusting each slag cooler according to the adjusting sub-parameter.
2. The slag removal regulating system of claim 1, wherein the regulating parameter arithmetic circuit comprises a deviation arithmetic module, a proportionality coefficient selector, an integration time selector, and a regulator;
three input ends of the regulator are respectively connected with the output end of the deviation operation module, the output end of the proportional coefficient selector and the output end of the integral time selector, and the output end of the regulator is connected with the main control equipment;
the deviation operation module is used for calculating a difference value between an input actually measured pressure value of the water-cooling air chamber and a preset pressure value; the proportionality coefficient selector is used for selecting a target proportionality coefficient corresponding to an input operation mode of each slag cooler; the integral time selector is used for selecting target integral time corresponding to the operation mode according to the input operation mode of each slag cooler; and the regulator is used for calculating to obtain the system regulating parameter according to the difference value, the target proportionality coefficient and the target integration time.
3. The slag removal conditioning system of claim 2, wherein the system conditioning parameter is
Figure FDA0002431891850000021
Wherein k ispIs the target scale factor, E is the difference, TiFor the target integration time, TdFor presetting a differential time, kdIs a preset differential coefficient.
4. The slag removal adjustment system of claim 2, wherein the scaling factor selector and the integration time selector are one-out-of-three selectors.
5. The slag removal conditioning system of claim 1, wherein the slag cooler conditioning circuit includes a humidity comparator, a temperature comparator, and a logic operator;
and two input ends of the logic arithmetic unit are respectively connected with the output end of the temperature comparator and the output end of the humidity comparator, and the output ends of the logic arithmetic unit are connected with the input end of the slag cooler adjusting circuit.
6. The slag removal regulating system of claim 5, wherein the slag cooler regulating circuit includes a parameter selector and a slag cooler regulator;
the input end of the parameter selector is respectively connected with the output end of the logic arithmetic unit and the main control equipment, the output end of the parameter selector is connected with the slag cooler regulator, and the slag cooler regulator is also connected with the corresponding slag cooler;
when the system adjusting coefficient output by the logic arithmetic unit represents that at least one of the temperature value and the temperature value exceeds a preset value, the parameter selector is used for determining an adjusting sub-parameter according to the system adjusting parameter at the previous moment, and the slag cooler adjuster is used for adjusting the slag cooler according to the adjusting sub-parameter.
7. The slag removal adjustment system of claim 6, wherein the parameter selector is a one-of-two selector.
8. The slag removal regulating system of claim 1, wherein the master control unit is further configured to receive and respond to a user-triggered regulating mode selection operation, and perform the step of outputting the system regulating parameters at the current time and the previous time to the slag cooler regulating circuit if the selected regulating mode is a target regulating mode.
9. A slag removal control method applied to the slag removal control system according to any one of claims 1 to 8, the method comprising:
the adjusting parameter operation circuit calculates and obtains system adjusting parameters according to the received actually measured pressure value of the water cooling air chamber and the operation mode of each slag cooler;
each adjusting coefficient operation branch circuit calculates to obtain a system adjusting coefficient according to the received temperature value and the received humidity value of the slag cooler;
the main control equipment stores the received system adjusting parameters and sends the system adjusting parameters at the current moment and the last moment to the corresponding slag cooler adjusting circuits;
and each slag cooler adjusting circuit selects a target adjusting parameter from the system adjusting parameters at the current moment or the last moment according to the input system adjusting coefficient to determine an adjusting sub-parameter, and adjusts the corresponding slag cooler according to the adjusting sub-parameter.
10. The slag removal control method of claim 9, further comprising:
and the main control equipment receives and responds to the adjustment mode selection operation of the user, and executes the step of sending the system adjustment parameters at the current moment and the previous moment to the corresponding slag cooler adjustment circuit under the condition that the selected adjustment mode is the target adjustment mode.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08166116A (en) * 1994-12-12 1996-06-25 Ishikawajima Harima Heavy Ind Co Ltd Screw conveyor type ash cooler
CN101329582A (en) * 2008-07-18 2008-12-24 东南大学 Method for optimizing and diagnosing circulating fluid bed boiler combustion
CN101896770A (en) * 2007-12-12 2010-11-24 阿尔斯托姆科技有限公司 Moving bed heat exchanger for circulating fluidized bed boiler
CN102944011A (en) * 2012-09-07 2013-02-27 德阳劲达节能科技有限责任公司 Control system and control method for material bed of circulating fluidized bed boiler
CN105042580A (en) * 2015-08-07 2015-11-11 朔州市恒信电力设备检修有限公司 Automatic control system of air-water combined slag cooler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08166116A (en) * 1994-12-12 1996-06-25 Ishikawajima Harima Heavy Ind Co Ltd Screw conveyor type ash cooler
CN101896770A (en) * 2007-12-12 2010-11-24 阿尔斯托姆科技有限公司 Moving bed heat exchanger for circulating fluidized bed boiler
CN101329582A (en) * 2008-07-18 2008-12-24 东南大学 Method for optimizing and diagnosing circulating fluid bed boiler combustion
CN102944011A (en) * 2012-09-07 2013-02-27 德阳劲达节能科技有限责任公司 Control system and control method for material bed of circulating fluidized bed boiler
CN105042580A (en) * 2015-08-07 2015-11-11 朔州市恒信电力设备检修有限公司 Automatic control system of air-water combined slag cooler

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