Alkali furnace soot blower control method and system and waste water incineration device

Abstract

The invention relates to a control method and system for an alkali furnace soot blower and a waste water incineration device, and the method comprises the steps: analyzing the color change of an alkali furnace, and obtaining the soot deposition distribution information of the alkali furnace; according to the soot deposition distribution information and the operation working condition and structure information of the alkali furnace, the type and the soot blowing sequence of soot blowers of the alkali furnace at each soot blowing position are obtained; the method comprises the following steps: analyzing historical data of soot blowing of an alkali furnace to obtain constraint conditions of soot blower control of the alkali furnace under the current soot deposition distribution condition, and optimizing the constraint conditions by adopting analogue simulation of soot blowing of the alkali furnace to obtain an optimal constraint condition; and according to the type of the soot blower of the alkali furnace, the soot blowing sequence and the optimal constraint condition, a soot blowing strategy of the soot blower of the alkali furnace under the current soot deposition distribution condition is obtained, so that the soot blower of the alkali furnace performs soot blowing on the alkali furnace based on the soot blowing strategy, and the optimal soot blowing working condition is obtained. The soot blowing mode of the alkali furnace can be adjusted in a self-adaptive mode, the operation frequency and steam consumption of the soot blower of the alkali furnace are reduced, and the soot blowing efficiency of the alkali furnace is improved.

Description

Technical Field

[0001] The invention relates to the technical field of alkali furnace sootblowing control, and in particular to a control method and system for an alkali furnace sootblower and a wastewater incineration device. Background Art

[0002] The alkali furnace soot blower is a device used to remove the ash accumulated on the heating surface of the alkali furnace. The alkali furnace soot blower uses high-temperature and high-pressure steam to flow through a continuously changing rotating nozzle and spray at high speed, generating a large impact force, thereby blowing away the ash accumulated on the heating surface of the alkali furnace.

[0003] At present, after the control program of the alkali furnace sootblower is programmed, its program cannot be changed or adjusted again, because it is written according to the user's requirements before the control logic is written. After the debugging is completed, if the user wants to change the program, it needs to be reprogrammed and debugged by professionals, which is time-consuming and costly. Therefore, the alkali furnace sootblower generally adopts a timed and quantitative program sootblowing mode during operation, and the operation mode cannot be changed in a short time. This fixed sootblowing mode does not take into account the actual situation of the boiler heating surface, and always adopts the timed sootblowing method, resulting in a large amount of energy waste. Even inappropriate sootblowing positions and methods will cause cavitation of the heating surface, thereby shortening the service life of the alkali furnace.

[0004] Therefore, those skilled in the art are in urgent need of a technical solution that can intelligently adjust the sootblowing mode of the alkali furnace sootblower. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a control method and system for an alkali furnace sootblower and a wastewater incineration device, which solve the technical problem that the sootblowing mode of the alkali furnace sootblower cannot be adaptively adjusted.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, an embodiment of the present invention provides a control method for a alkali furnace soot blower, comprising:

[0010] Obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace;

[0011] According to the ash accumulation distribution information and the operating condition information, combined with the structural information of the alkali furnace, the type of the alkali furnace sootblower at each sootblowing position in the alkali furnace and the sootblowing sequence of the alkali furnace sootblower are obtained;

[0012] By analyzing the historical data of alkali furnace soot blowing, the constraint conditions of alkali furnace soot blower control under the current ash accumulation distribution are obtained, and the constraint conditions are optimized by using the simulation of alkali furnace soot blowing to obtain the optimal constraint conditions of alkali furnace soot blower control;

[0013] According to the alkali furnace sootblower type, the sootblowing sequence and the optimal constraint condition, the sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution is obtained, so that the alkali furnace sootblower can sootblow the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing condition.

[0014] Optionally, obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace includes:

[0015] Through the preset sensors, the current operating condition information and color change information of the alkali furnace are obtained;

[0016] The part where the color change occurs in the alkali furnace is determined as the dust accumulation part, and the color difference of the dust accumulation part is compared with the original color of the alkali furnace, and the degree of dust accumulation of the alkali furnace is determined according to the comparison result;

[0017] When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is lower than the set first color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is light dust accumulation;

[0018] When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is between the first color difference threshold and the set second color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is moderate dust accumulation;

[0019] When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is higher than the second color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is heavy dust accumulation.

[0020] Optionally, after obtaining the current operating condition information and color change information of the alkali furnace, analyzing the color change information, and obtaining the ash accumulation distribution information of the alkali furnace, the method further includes:

[0021] Obtaining the thickness information of the dust accumulation in the dust accumulation part;

[0022] Traverse the dust thickness of each dust accumulation part and correct the dust accumulation degree of the dust accumulation part;

[0023] When the dust accumulation thickness of the dust accumulation part is lower than the set first thickness threshold, the dust accumulation degree of the dust accumulation part is lowered by one level;

[0024] When the dust accumulation thickness of the dust accumulation part is between the first thickness threshold and the set second set threshold, the dust accumulation degree of the dust accumulation part is maintained;

[0025] When the dust accumulation thickness of the dust accumulation portion is higher than the second thickness threshold, the dust accumulation degree of the dust accumulation portion is increased by one level.

[0026] Optionally, according to the ash accumulation distribution information and the operating condition information, in combination with the structural information of the alkali furnace, obtaining the type of alkali furnace sootblowers at each sootblowing position in the alkali furnace and the sootblowing sequence of the alkali furnace sootblowers comprises:

[0027] Acquiring structural information of the alkali furnace, wherein the structural information includes heating surface position information and flue gas flow direction information;

[0028] According to the current operation condition and ash accumulation distribution information of the alkali furnace, combined with the structural information of the alkali furnace, the type of alkali furnace soot blower at each soot blowing position in the alkali furnace is determined;

[0029] According to the flue gas flow direction information in the operating condition, traverse the soot blowing flow directions of all alkali furnace soot blowers to obtain the soot blowing sequence of the alkali furnace soot blowers;

[0030] Among them, the alkali furnace soot blower includes a variable frequency alkali furnace soot blower and a single frequency alkali furnace soot blower.

[0031] Optionally, by analyzing the historical data of alkali furnace sootblowing, the constraints of alkali furnace sootblower control under the current ash accumulation distribution are obtained, and the constraints are optimized by using simulation of alkali furnace sootblowing, and the optimal constraints of alkali furnace sootblower control are obtained, including:

[0032] Obtain historical data of alkali boiler soot blowing over a period of time;

[0033] Under the current ash accumulation distribution, at least two alkali furnace soot blower control schemes are extracted from the historical data for analysis to obtain alkali furnace soot blower control constraint conditions including alkali furnace operation state, soot blowing time, soot blowing steam pressure threshold, and soot blowing steam drain temperature threshold;

[0034] The optimal constraint conditions for controlling the alkali furnace sootblower are obtained by simulating the sootblowing action of the alkali furnace and adjusting the sootblowing steam pressure threshold and the sootblowing steam drain temperature threshold of the alkali furnace sootblower according to the simulation results.

[0035] Optionally, according to the type of the alkali furnace sootblower, the sootblowing sequence and the optimal constraint condition, a sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution is obtained, so that the alkali furnace sootblower performs sootblowing on the alkali furnace based on the sootblowing strategy, and obtaining the optimal sootblowing condition includes:

[0036] According to the type of the alkali furnace sootblower and the sootblowing sequence, an initial sootblowing strategy of the alkali furnace sootblower is obtained;

[0037] The initial soot blowing strategy is adjusted according to the optimal constraint condition to obtain the soot blowing strategy of the alkali furnace soot blower under the current soot accumulation distribution;

[0038] The sootblowing strategy is deployed to all alkali furnace sootblowers, so that the alkali furnace sootblowers can perform sootblowing on the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing working condition.

[0039] Optionally, after obtaining a sootblowing strategy for the alkali furnace sootblower under a current soot accumulation distribution according to the alkali furnace sootblower type, the sootblowing sequence and the optimal constraint condition, so that the alkali furnace sootblower performs sootblowing on the alkali furnace based on the sootblowing strategy and obtains an optimal sootblowing condition, the method includes:

[0040] Get the working status instruction of the alkali furnace;

[0041] When the working state instruction is a normal operation instruction, all alkali furnace sootblowers are controlled to perform cyclic sootblowing according to the sootblowing strategy;

[0042] When the working state instruction is an alkali furnace shutdown instruction or an alkali furnace sootblower failure instruction, all alkali furnace sootblower are controlled to perform single sootblowing according to the sootblowing strategy.

[0043] In a second aspect, an embodiment of the present invention provides a control system for an alkali furnace soot blower, comprising:

[0044] The ash accumulation analysis module of the alkali furnace is used to obtain the operating condition information and color change information of the current alkali furnace, and analyze the color change information to obtain the ash accumulation distribution information of the alkali furnace;

[0045] An alkali furnace sootblower type and sootblowing sequence determination module is used to obtain the alkali furnace sootblower type and the sootblowing sequence of the alkali furnace sootblower at each sootblowing position in the alkali furnace according to the ash accumulation distribution information and the operating condition information, combined with the structural information of the alkali furnace;

[0046] A control constraint condition acquisition module is used to obtain the constraint conditions of the alkali furnace soot blower control under the current ash accumulation distribution by analyzing the historical data of the alkali furnace soot blowing, and optimize the constraint conditions by using the simulation of the alkali furnace soot blowing to obtain the optimal constraint conditions of the alkali furnace soot blower control;

[0047] A sootblowing strategy acquisition module is used to obtain the sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution according to the alkali furnace sootblower type, the sootblowing sequence and the optimal constraint conditions, so that the alkali furnace sootblower can sootblow the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing condition.

[0048] In a third aspect, an embodiment of the present invention provides a wastewater incineration device, comprising:

[0049] alkali furnace;

[0050] An alkali furnace soot blower arranged on the alkali furnace, wherein the alkali furnace soot blower includes a variable frequency alkali furnace soot blower and a single frequency alkali furnace soot blower;

[0051] A controller connected to the alkali furnace and the alkali furnace soot blower respectively, the controller is used to execute the above-mentioned control method steps of the alkali furnace soot blower.

[0052] Optionally, the wastewater incineration device includes: a limit switch; the limit switch is arranged on the alkali furnace and is respectively connected to the alkali furnace soot blower and the controller, and is used for performing limit protection on the alkali furnace soot blower and obtaining the position information of the alkali furnace soot blower when the alkali furnace soot blower performs the soot blowing action.

[0053] (III) Beneficial effects

[0054] The beneficial effects of the present invention are as follows: a control method for an alkali furnace sootblower of the present invention, by comprehensively analyzing the operating condition information, color change information and structural information of the current alkali furnace, extracting the constraint conditions of the sootblowing control from the historical sootblowing data and optimizing the constraint conditions by alkali furnace sootblowing simulation, finally obtaining a technical solution of an alkali furnace sootblower control strategy for real-time response to alkali furnace sootblowing based on the analysis results and the optimized constraint conditions, compared with the prior art, it can adaptively adjust the sootblowing time, sootblowing position and sootblowing sequence of the alkali furnace sootblower, so that the sootblowing operation of the alkali furnace sootblower is closer to the production situation of the alkali furnace, can effectively reduce the operation frequency and steam consumption of the alkali furnace sootblower, improve the sootblowing efficiency of the alkali furnace, and also reduce manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic flow chart of a control method for a alkali furnace soot blower provided in one embodiment of the present invention;

[0056] Figure 2 A GUI interface schematic diagram of a sootblower arrangement in a sootblowing system of an alkali furnace provided in one embodiment of the present invention;

[0057] Figure 3 A schematic diagram of a GUI interface for setting control parameters of an alkali furnace soot blower provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0059] Prior to this, in order to facilitate understanding of the technical solution provided by the present invention, some basic information related to the technical solution of the present application is first introduced below, and the solution of the present application can be subsequently adjusted and controlled based on the basic information.

[0060] Alkali boiler: Alkali boiler, also known as alkali recovery boiler, is a device that generates steam by absorbing the heat of high-temperature flue gas discharged from combustion.

[0061] Alkali recovery: The process of recovering chemicals used in cooking.

[0062] Limit switch: The main function is to limit or detect the position of a moving object in a mechanical device to ensure that the mechanical equipment operates according to the predetermined position and stroke while providing safety protection.

[0063] refer to Figure 1 As shown, a control method for a soot blower of an alkali furnace proposed in an embodiment of the present invention includes: obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace; according to the ash accumulation distribution information and the operating condition information, in combination with the structural information of the alkali furnace, obtaining the type of alkali furnace soot blower at each soot blowing position in the alkali furnace and the soot blowing sequence of the alkali furnace soot blower; by analyzing the historical data of the alkali furnace soot blowing, obtaining the constraint conditions for the control of the alkali furnace soot blower under the current ash accumulation distribution, and optimizing the constraint conditions by using the simulation of the alkali furnace soot blowing, obtaining the optimal constraint conditions for the control of the alkali furnace soot blower; according to the type of the alkali furnace soot blower, the soot blowing sequence and the optimal constraint conditions, obtaining the soot blowing strategy of the alkali furnace soot blower under the current ash accumulation distribution, so that the alkali furnace soot blower blows the alkali furnace based on the soot blowing strategy to obtain the optimal soot blowing condition.

[0064] This embodiment adopts a technical solution of an alkali furnace sootblower control strategy that responds to alkali furnace sootblowing in real time based on the analysis results and the optimized constraints, by comprehensively analyzing the operating condition information, color change information and structural information of the current alkali furnace, extracting the constraints of sootblowing control from historical sootblowing data and optimizing the constraints by simulation of alkali furnace sootblowing. Compared with the prior art, this embodiment can adaptively adjust the sootblowing time, sootblowing position and sootblowing sequence of the alkali furnace sootblower, so that the sootblowing operation of the alkali furnace sootblower is closer to the production situation of the alkali furnace, can effectively reduce the operation frequency and steam consumption of the alkali furnace sootblower, improve the sootblowing efficiency of the alkali furnace, and reduce manual operation.

[0065] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0066] Specifically, refer to Figure 1As shown, a control method for a alkali furnace soot blower proposed in this embodiment includes:

[0067] S100, obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace.

[0068] During the operation of the alkali furnace, the alkali recovery process has different process operations in different time periods, resulting in different operating conditions of the alkali furnace in different time periods. The different operating conditions include the temperature, pressure, flue gas flow direction and ash accumulation degree in the furnace of the alkali furnace. Among them, the ash accumulation degree cannot be directly obtained. Therefore, this embodiment adopts the analysis of the color of the ash accumulation, so as to accurately obtain the ash accumulation distribution information in the furnace of the alkali furnace, and can also determine the ash accumulation degree of each ash accumulation part through different color difference changes, so that the alkali furnace soot blower can perform accurate soot blowing action based on the ash accumulation degree, reduce the commissioning frequency and steam consumption of the alkali furnace soot blower, and achieve the technical effect of improving the soot blowing efficiency.

[0069] In this embodiment, step S100 includes the following sub-steps S110-S130:

[0070] S110. Obtaining the current operating condition information and color change information of the alkali furnace through a preset sensor.

[0071] For example, the temperature inside the alkali furnace is measured by a temperature sensor; the pressure change inside the alkali furnace is monitored by a pressure sensor; the flow rate of various fluids (such as gas, liquid) in the alkali furnace is measured by a flow sensor; the concentration of harmful gases or vapors that may be generated in the alkali furnace is monitored by a gas sensor; and the color change inside the alkali furnace is monitored by visual detection of a camera or a color sensor.

[0072] S120, determining the part in the alkali furnace where the color change occurs as the dust accumulation part, and comparing the color difference of the dust accumulation part with the original color of the alkali furnace, and judging the dust accumulation degree of the alkali furnace according to the comparison result.

[0073] S130a. When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is lower than a set first color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is light dust accumulation.

[0074] S130b: When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is between the first color difference threshold and the set second color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is moderate dust accumulation.

[0075] S130c: When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is higher than the second color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is heavy dust accumulation.

[0076] In a specific embodiment, an image of the alkali furnace is captured by a camera, and the color information of the alkali furnace is obtained by image processing technology. Then, the color difference of the color in the alkali furnace is compared with the original color of the alkali furnace. Finally, the obtained color difference value is compared with the set first color difference threshold and second color difference threshold to determine the dust accumulation degree of each part of each alkali furnace. For example, when the color difference value is lower than 0.5ΔE (ΔE is the unit of color difference value), the dust accumulation degree of the part is light dust accumulation; when the color difference value is between 0.5ΔE and 2.0ΔE, the dust accumulation degree of the part is moderate dust accumulation; when the color difference value is higher than 2.0ΔE, the dust accumulation degree of the part is heavy dust accumulation.

[0077] In this embodiment, after obtaining the dust accumulation degree of the dust accumulation part through the color change information of the current alkali furnace, the dust accumulation degree can also be corrected through the following steps F100-1300:

[0078] F100. Obtain the thickness information of the dust accumulation in the dust accumulation area.

[0079] For example, the thickness of dust accumulation at the dust accumulation site can be checked by ultrasonic sensors, capacitive dust detection sensors, and infrared sensors.

[0080] F200, traverse the dust thickness of each dust accumulation part and correct the dust accumulation degree of the dust accumulation part.

[0081] F300a. When the dust accumulation thickness of the dust accumulation part is lower than the set first thickness threshold, the dust accumulation degree of the dust accumulation part is reduced by one level.

[0082] F300b. When the dust accumulation thickness of the dust accumulation portion is between the first thickness threshold and the set second set threshold, the dust accumulation degree of the dust accumulation portion is maintained.

[0083] F300c. When the dust accumulation thickness of the dust accumulation area is higher than the second thickness threshold, the dust accumulation degree of the dust accumulation area is increased by one level.

[0084] In a specific embodiment, the first thickness threshold is set to 2 mm, and the second thickness threshold is set to 4 mm. When the dust accumulation degree of the dust accumulation part of the alkali furnace is judged to be moderate dust accumulation through color change, if the detected dust accumulation thickness is 1 mm, it is necessary to correct the dust accumulation degree of the dust accumulation part to light dust accumulation; if the detected dust accumulation thickness is 5 mm, it is necessary to correct the dust accumulation degree of the dust accumulation part to heavy dust accumulation.

[0085] It is worth mentioning that the color difference threshold of dust accumulation can be set not only to two color difference thresholds, but also to set more color difference thresholds within the color difference variation range, so as to make a finer classification of the degree of dust accumulation, thereby improving the accuracy of judging the degree of dust accumulation. Similarly, the thickness threshold of dust accumulation can also set more thickness thresholds within the thickness variation range, further improving the accuracy of judging the degree of dust accumulation.

[0086] S200, according to the ash accumulation distribution information and the operation condition information, combined with the structural information of the alkali furnace, the type of the alkali furnace sootblower at each sootblowing position in the alkali furnace and the sootblowing sequence of the alkali furnace sootblower are obtained.

[0087] In this embodiment, step S200 includes the following sub-steps S210-S230:

[0088] S210. Acquire structural information of the alkali furnace, where the structural information includes heating surface position information and flue gas flow direction information.

[0089] By analyzing the engineering documents of the alkali furnace, the structural information of the alkali furnace is obtained, and at least the position information of the heating surface in the alkali furnace and the flue gas flow direction information are obtained.

[0090] S220, according to the current operation condition and ash accumulation distribution information of the alkali furnace, combined with the structural information of the alkali furnace, determine the type of alkali furnace soot blower at each soot blowing position in the alkali furnace. The alkali furnace soot blower includes a variable frequency alkali furnace soot blower and a single frequency alkali furnace soot blower.

[0091] In a specific embodiment, Figure 2 When the alkali furnace with 26 sootblowing positions enters the sootblowing action, when the operating conditions are stable within a certain range, the single-frequency alkali furnace sootblower is selected for sootblowing, and when the operating conditions are beyond the range, the variable-frequency alkali furnace sootblower is selected for sootblowing; when the sootblowing position has no soot accumulation or slight soot accumulation, no alkali furnace sootblower is selected for sootblowing at the sootblowing position. In addition, the working position of the alkali furnace sootblower is in the alkali furnace hearth. Since the temperature of the alkali furnace hearth is very high, the corresponding type of alkali furnace sootblower is pushed to the sootblowing position in the alkali furnace hearth by forward rotation only when the alkali furnace sootblower needs to work. After the alkali furnace sootblower completes the sootblowing work, it returns to the starting position by reverse rotation.

[0092] S230. According to the flue gas flow direction information in the operating condition, traverse the soot blowing directions of all the alkali furnace soot blowers to obtain the soot blowing sequence of the alkali furnace soot blowers.

[0093] In a specific embodiment, in Figure 2 When the alkali furnace with 26 soot blowing positions enters the soot blowing action, according to the flue gas flow direction information in the operating condition, after traversing the soot blowing flow directions of all the alkali furnace soot blowers, the following is obtained: Figure 3 The soot blowing sequence of the alkali furnace soot blower shown is as follows: Figure 3 The table is used to represent the sootblowing sequence of the alkali furnace sootblower. For example, 2 in the first column of the first row represents that the second alkali furnace sootblower performs the first sootblowing action, 26 in the sixth column of the first row represents that the 26th alkali furnace sootblower performs the sixth sootblowing action, and 25 in the third column of the second row represents that the 25th alkali furnace sootblower performs the 13th sootblowing action.

[0094] S300, by analyzing the historical data of alkali furnace soot blowing, the constraint conditions of alkali furnace soot blower control under the current ash accumulation distribution are obtained, and the constraint conditions are optimized by using the simulation of alkali furnace soot blowing to obtain the optimal constraint conditions of alkali furnace soot blower control.

[0095] In this embodiment, step S300 includes the following sub-steps S310-S330:

[0096] S310, obtaining historical data of alkali furnace soot blowing within a period of time.

[0097] S320. Under the current ash accumulation distribution, extract at least two alkali furnace soot blower control schemes from historical data for analysis to obtain alkali furnace soot blower control constraint conditions including alkali furnace operation status, soot blowing time, soot blowing steam pressure threshold, and soot blowing steam drain temperature threshold.

[0098] S330, by simulating the sootblowing action of the alkali furnace, and adjusting the sootblowing steam pressure threshold and the sootblowing steam drain temperature threshold of the alkali furnace sootblower according to the simulation results, the optimal constraint conditions for the control of the alkali furnace sootblower are obtained.

[0099] In a specific embodiment, according to the current distribution of ash accumulation in the alkali furnace, at least two alkali furnace soot blower control schemes are extracted from the historical data of alkali furnace soot blowing within one month for analysis, and the constraints of the alkali furnace operation state are obtained, including: the alkali furnace is operating normally, the alkali furnace is not washed, and the alkali furnace soot blower steam supply valve is opened normally; the constraint of the soot blowing time is 90 seconds; the soot blowing steam pressure threshold and the soot blowing steam drain temperature threshold are obtained by simulating the soot blowing action of the alkali furnace, and the soot blowing steam pressure threshold is 120bar and the soot blowing steam drain temperature threshold is 200℃. In this embodiment, by extracting the soot blowing control constraints from the historical soot blowing data and optimizing the constraints by using the simulation of the alkali furnace soot blowing, the optimal control constraints of the alkali furnace soot blower are obtained, which can effectively reduce the commissioning frequency and steam consumption of the alkali furnace soot blower, improve the heat transfer efficiency of the alkali furnace, and reduce the exhaust temperature of the alkali furnace, thereby achieving energy saving and consumption reduction of the unit.

[0100] S400, according to the type of the alkali furnace sootblower, the sootblowing sequence and the optimal constraint condition, the sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution is obtained, so that the alkali furnace sootblower can sootblow the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing condition.

[0101] In this embodiment, step S400 includes the following sub-steps S410-S430:

[0102] S410, obtaining an initial sootblowing strategy for the alkali furnace sootblower according to the type and sootblowing sequence of the alkali furnace sootblower.

[0103] S420. Adjust the initial soot blowing strategy according to the optimal constraint conditions to obtain the soot blowing strategy of the alkali furnace soot blower under the current ash accumulation distribution.

[0104] The initial sootblowing strategy is adjusted according to the optimal constraint conditions. The main adjustment parameters are the sootblowing time and the variable frequency speed of the variable frequency alkali furnace sootblower. The parameter setting can be found in Figure 3 The variable frequency speed of the variable frequency alkali furnace soot blower is mainly adjusted according to the soot blowing steam pressure and the soot blowing steam drain temperature.

[0105] S430, deploying the sootblowing strategy to all alkali furnace sootblowers, so that the alkali furnace sootblowers can perform sootblowing on the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing working condition.

[0106] In this embodiment, after step S400, the following sub-steps S510-S520 are also included:

[0107] S510, obtaining the working status instruction of the alkali furnace.

[0108] S520a. When the working state instruction is a normal operation instruction, all alkali furnace sootblowers are controlled to perform cyclic sootblowing according to the sootblowing strategy.

[0109] S520b. When the working state instruction is an alkali furnace stop instruction or an alkali furnace sootblower failure instruction, all alkali furnace sootblower are controlled to perform single sootblowing according to the sootblowing strategy.

[0110] In addition, an embodiment of the present invention further provides a control system for an alkali furnace soot blower, which includes:

[0111] The ash accumulation analysis module of the alkali furnace is used to obtain the operating condition information and color change information of the current alkali furnace, and analyze the color change information to obtain the ash accumulation distribution information of the alkali furnace.

[0112] The module for determining the type and order of soot blowers of the alkali furnace is used to obtain the type and order of soot blowers of the alkali furnace at each soot blowing position in the alkali furnace according to the ash accumulation distribution information and the operating condition information, combined with the structural information of the alkali furnace.

[0113] The control constraint condition acquisition module is used to obtain the constraint conditions of the alkali furnace sootblower control under the current ash accumulation distribution by analyzing the historical data of the alkali furnace sootblowing, and optimize the constraint conditions by using the simulation of the alkali furnace sootblowing to obtain the optimal constraint conditions of the alkali furnace sootblower control.

[0114] The sootblowing strategy acquisition module is used to obtain the sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution according to the sootblower type, sootblowing sequence and optimal constraints of the alkali furnace, so that the alkali furnace sootblower can blow soot on the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing condition.

[0115] In addition, an embodiment of the present invention further provides a wastewater incineration device, comprising: an alkali furnace; an alkali furnace soot blower arranged on the alkali furnace, the alkali furnace soot blower comprising a variable frequency alkali furnace soot blower and a single frequency alkali furnace soot blower; a controller respectively connected to the alkali furnace and the alkali furnace soot blower, the controller being used to execute the above-described steps of a control method for an alkali furnace soot blower.

[0116] The wastewater incineration device also includes: a limit switch; the limit switch is arranged on the alkali furnace and connected to the alkali furnace soot blower and the controller respectively, and is used to limit the alkali furnace soot blower and obtain the position information of the alkali furnace soot blower when the alkali furnace soot blower performs the soot blowing action.

[0117] In summary, the embodiment of the present invention provides a control method, system and wastewater incineration device for an alkali furnace sootblower, and the control method includes: first, by comprehensively analyzing the operating condition information, color change information and structural information of the current alkali furnace, the alkali furnace sootblower type at each sootblowing position in the alkali furnace and the sootblowing sequence of the alkali furnace sootblower are obtained; then, the sootblowing control constraint conditions are extracted from the historical sootblowing data and the constraint conditions are optimized by using the simulation of the alkali furnace sootblowing; finally, based on the analysis results and the optimized constraint conditions, a control strategy for the alkali furnace sootblower that responds to the alkali furnace sootblowing in real time is generated, and the number of sootblowing cycles of the alkali furnace sootblower is obtained according to the working state instruction of the alkali furnace. The present invention can adaptively adjust the sootblowing time, sootblowing position and sootblowing sequence of the alkali furnace sootblower, so that the sootblowing operation of the alkali furnace sootblower is closer to the production situation of the alkali furnace, can effectively reduce the commissioning frequency and steam consumption of the alkali furnace sootblower, improve the sootblowing efficiency of the alkali furnace, and also reduce manual operation.

[0118] Since the system / device described in the above embodiments of the present invention is a system / device used to implement the method of the above embodiments of the present invention, a person skilled in the art can understand the specific structure and deformation of the system / device based on the method described in the above embodiments of the present invention, and thus will not be described in detail here. All systems / devices used in the method of the above embodiments of the present invention belong to the scope of protection of the present invention.

[0119] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0120] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions.

[0121] It should be noted that in the description of the present invention, the word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. The use of the words first, second, third, etc., is only for convenience of expression and does not indicate any order. These words may be understood as part of the name of the component.

[0122] In addition, it should be noted that, in the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0123] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments after obtaining the basic inventive concepts.

[0124] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the invention.

Claims

1. A control method for a alkali furnace soot blower, characterized in that: include: Obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace; According to the ash accumulation distribution information and the operating condition information, combined with the structural information of the alkali furnace, the type of the alkali furnace sootblower at each sootblowing position in the alkali furnace and the sootblowing sequence of the alkali furnace sootblower are obtained; By analyzing the historical data of alkali furnace soot blowing, the constraint conditions of alkali furnace soot blower control under the current ash accumulation distribution are obtained, and the constraint conditions are optimized by using the simulation of alkali furnace soot blowing to obtain the optimal constraint conditions of alkali furnace soot blower control; According to the alkali furnace sootblower type, the sootblowing sequence and the optimal constraint condition, the sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution is obtained, so that the alkali furnace sootblower can sootblow the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing condition.

2. The method according to claim 1, characterized in that Obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace includes: Through the preset sensors, the current operating condition information and color change information of the alkali furnace are obtained; The part where the color change occurs in the alkali furnace is determined as the dust accumulation part, and the color difference of the dust accumulation part is compared with the original color of the alkali furnace, and the degree of dust accumulation of the alkali furnace is determined according to the comparison result; When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is lower than the set first color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is light dust accumulation; When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is between the first color difference threshold and the set second color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is moderate dust accumulation; When the color difference between the color of the dust accumulation part and the original color of the alkali furnace is higher than the second color difference threshold, it is determined that the dust accumulation degree of the dust accumulation part is heavy dust accumulation.

3. The method according to claim 2, characterized in that After obtaining the current operating condition information and color change information of the alkali furnace, and analyzing the color change information to obtain the ash accumulation distribution information of the alkali furnace, the method further includes: Obtaining the thickness information of the dust accumulation in the dust accumulation part; Traverse the dust thickness of each dust accumulation part and correct the dust accumulation degree of the dust accumulation part; When the dust accumulation thickness of the dust accumulation part is lower than the set first thickness threshold, the dust accumulation degree of the dust accumulation part is lowered by one level; When the dust accumulation thickness of the dust accumulation part is between the first thickness threshold and the set second set threshold, the dust accumulation degree of the dust accumulation part is maintained; When the dust accumulation thickness of the dust accumulation portion is higher than the second thickness threshold, the dust accumulation degree of the dust accumulation portion is increased by one level.

4. The method according to claim 1, characterized in that According to the ash accumulation distribution information and the operating condition information, combined with the structural information of the alkali furnace, obtaining the type of the alkali furnace soot blower at each soot blowing position in the alkali furnace and the soot blowing sequence of the alkali furnace soot blower comprises: Acquiring structural information of the alkali furnace, wherein the structural information includes heating surface position information and flue gas flow direction information; According to the current operation condition and ash accumulation distribution information of the alkali furnace, combined with the structural information of the alkali furnace, the type of alkali furnace soot blower at each soot blowing position in the alkali furnace is determined; According to the flue gas flow direction information in the operating condition, traverse the soot blowing flow directions of all alkali furnace soot blowers to obtain the soot blowing sequence of the alkali furnace soot blowers; Among them, the alkali furnace soot blower includes a variable frequency alkali furnace soot blower and a single frequency alkali furnace soot blower.

5. The method according to claim 1, characterized in that By analyzing the historical data of alkali furnace soot blowing, the constraints of alkali furnace soot blower control under the current ash accumulation distribution are obtained, and the constraints are optimized by using the simulation of alkali furnace soot blowing. The optimal constraints of alkali furnace soot blower control include: Obtain historical data of alkali boiler soot blowing over a period of time; Under the current ash accumulation distribution, at least two alkali furnace soot blower control schemes are extracted from the historical data for analysis to obtain alkali furnace soot blower control constraint conditions including alkali furnace operation state, soot blowing time, soot blowing steam pressure threshold, and soot blowing steam drain temperature threshold; The optimal constraint conditions for controlling the alkali furnace sootblower are obtained by simulating the sootblowing action of the alkali furnace and adjusting the sootblowing steam pressure threshold and the sootblowing steam drain temperature threshold of the alkali furnace sootblower according to the simulation results.

6. The method according to claim 1, characterized in that According to the type of the alkali furnace sootblower, the sootblowing sequence and the optimal constraint condition, a sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution is obtained, so that the alkali furnace sootblower performs sootblowing on the alkali furnace based on the sootblowing strategy, and obtaining the optimal sootblowing condition includes: According to the type of the alkali furnace sootblower and the sootblowing sequence, an initial sootblowing strategy of the alkali furnace sootblower is obtained; The initial soot blowing strategy is adjusted according to the optimal constraint condition to obtain the soot blowing strategy of the alkali furnace soot blower under the current soot accumulation distribution; The sootblowing strategy is deployed to all alkali furnace sootblowers, so that the alkali furnace sootblowers can perform sootblowing on the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing working condition.

7. The method according to any one of claims 1 to 6, characterized in that: After obtaining the sootblowing strategy of the alkali furnace sootblower under the current soot accumulation distribution according to the type of the alkali furnace sootblower, the sootblowing sequence and the optimal constraint condition, so that the alkali furnace sootblower performs sootblowing on the alkali furnace based on the sootblowing strategy and obtains the optimal sootblowing condition, the method comprises: Get the working status instruction of the alkali furnace; When the working state instruction is a normal operation instruction, all alkali furnace sootblowers are controlled to perform cyclic sootblowing according to the sootblowing strategy; When the working state instruction is an alkali furnace shutdown instruction or an alkali furnace sootblower failure instruction, all alkali furnace sootblower are controlled to perform single sootblowing according to the sootblowing strategy.

8. A control system for an alkali furnace soot blower, characterized in that: include: The ash accumulation analysis module of the alkali furnace is used to obtain the operating condition information and color change information of the current alkali furnace, and analyze the color change information to obtain the ash accumulation distribution information of the alkali furnace; An alkali furnace sootblower type and sootblowing sequence determination module is used to obtain the alkali furnace sootblower type and the sootblowing sequence of the alkali furnace sootblower at each sootblowing position in the alkali furnace according to the ash accumulation distribution information and the operating condition information, combined with the structural information of the alkali furnace; A control constraint condition acquisition module is used to obtain the constraint conditions of the alkali furnace soot blower control under the current ash accumulation distribution by analyzing the historical data of the alkali furnace soot blowing, and optimize the constraint conditions by using the simulation of the alkali furnace soot blowing to obtain the optimal constraint conditions of the alkali furnace soot blower control; A sootblowing strategy acquisition module is used to obtain the sootblowing strategy of the alkali furnace sootblower under the current ash accumulation distribution according to the alkali furnace sootblower type, the sootblowing sequence and the optimal constraint conditions, so that the alkali furnace sootblower can sootblow the alkali furnace based on the sootblowing strategy to obtain the optimal sootblowing condition.

9. A wastewater incineration device, characterized in that: include: alkali furnace; An alkali furnace soot blower arranged on the alkali furnace, wherein the alkali furnace soot blower includes a variable frequency alkali furnace soot blower and a single frequency alkali furnace soot blower; A controller connected to the alkali furnace and the alkali furnace sootblower respectively, the controller is used to execute the steps of a control method for an alkali furnace sootblower according to any one of claims 1-7.

10. The device according to claim 9, characterized in that include: Limit switch; the limit switch is arranged on the alkali furnace and is connected to the alkali furnace soot blower and the controller respectively, and is used to perform limit protection on the alkali furnace soot blower and obtain position information of the alkali furnace soot blower when the alkali furnace soot blower performs soot blowing action.

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