A sootblower sootblowing steam automatic adjustment device

Abstract

The present invention relates to the technical field of sootblower control, and in particular to an automatic adjustment device for the amount of steam used for sootblowing of a sootblower. The device comprises: a heat acquisition unit for real-time acquisition of the heat absorption of the heating surface of the suspension part; a flue gas acquisition unit for real-time acquisition of the flue gas volume M of the flue gas; a temperature acquisition unit for real-time acquisition of the temperature of each part of the flue gas; a fouling calculation unit for real-time calculation of the fouling degree coefficient k of the heating surface of the suspension part, and also for real-time calculation of the fouling degree coefficient K of the furnace part; a furnace condition acquisition unit for real-time acquisition of the state parameters of the boiler; and a steam volume control unit for real-time determination of the sootblowing steam volume of the sootblower according to the acquired relevant data. The present invention monitors and acquires the parameters that affect the sootblowing steam volume in the boiler in real-time, and automatically adjusts the sootblowing steam volume of the sootblower according to the relevant parameters in real-time, so as to achieve the optimal sootblowing steam volume under different conditions.

Description

Background Art

[0002] A soot blower is a device used to remove soot from the heating surface of a boiler. It consists of a soot blowing pipe and operating valves, and is generally installed on the furnace wall of the boiler furnace, horizontal flue, and tail flue. There are many types of soot blowers, such as gun type, rotary type, and telescopic type, and three types of soot blowers, such as air soot blowers, steam soot blowers, and hydraulic soot blowers, according to the different media used. Regular use of soot blowers to promptly remove soot from various heating surfaces plays an important role in ensuring safe and economical operation of the boiler.

[0003] However, in the prior art, since the boiler is required to be able to supply energy stably, coal-fired boilers must use various types of coal. In this case, since the amount of ash attached to the heating surface is different for different types of coal, when the soot blower is started according to the program control of the predetermined steam volume, insufficient steam will occur, and complete soot blowing will not be possible. There will also be problems such as energy waste caused by excessive steam volume. Therefore, how to provide a soot blower soot blowing automatic steam adjustment device is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The object of the present invention is to provide a device for automatically adjusting the sootblowing steam volume of a sootblower. The device monitors and obtains the parameters that affect the sootblowing steam volume in the boiler in real time, and automatically adjusts the sootblowing steam volume of the sootblower in real time according to the relevant parameters to achieve the optimal sootblowing steam volume under different conditions.

[0005] The present invention improves the prior art. Since the boiler is required to be able to supply energy stably, the coal-fired boiler must use various types of coal. Different types of coal have different amounts of ash attached to the heating surface. Therefore, when the soot blower is started according to the program control of the predetermined steam volume, it will lead to the problem of being unable to provide steam volume. The present invention calculates the dirt degree coefficient of the heating surface of the suspension part in real time, automatically adjusts and controls the soot blowing steam volume of the soot blower, and corrects and adjusts the soot blowing steam volume in combination with the dirt degree coefficient of the furnace part, so that the soot blower is suitable for adjusting the soot blowing steam volume under any circumstances, thereby improving the soot blowing work efficiency and avoiding unnecessary energy consumption.

[0006] The present invention improves the prior art. Traditional boiler control is a complex calculation that can only be completed by a medium or large computer control program. However, it occupies a large area and has high requirements for the setting environment. The present invention uses a microprocessor. While having the functions of the original medium or large computer control program, the microprocessor also has the advantages of small size, high reliability and simple structure. The microprocessor mostly adopts a modular hardware structure. The functional components in the system are connected through standardized slots and interfaces. Users can form microcomputer systems of different requirements and scales by selecting different functional components and corresponding peripheral devices.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A sootblower sootblowing steam automatic adjustment device, comprising:

[0009] A heat acquisition unit is used to obtain the heat absorption of the heating surface of the suspension part in real time;

[0010] A smoke acquisition unit, used to acquire the smoke volume M of the smoke in real time;

[0011] A temperature acquisition unit, used to acquire the temperature of the flue gas in each part in real time;

[0012] A fouling calculation unit, used for calculating the fouling degree coefficient k of the heating surface of the suspension part in real time, and also used for calculating the fouling degree coefficient K of the furnace part in real time;

[0013] A furnace condition acquisition unit, used to acquire the state parameters of the boiler in real time, wherein the state parameters include the amount of water sprayed and the amount of recirculated flue gas;

[0014] The steam volume control unit is used to determine the sootblowing steam volume of the sootblower in real time according to the heat absorption of the heating surface of the suspension part, the flue gas volume of the flue gas, the temperature of the flue gas in each part, the fouling degree coefficient k of the heating surface of the suspension part, the fouling degree coefficient K of the furnace part and the state parameters of the boiler.

[0015] In some embodiments of the present application, the fouling calculation unit is used to calculate the fouling degree coefficient k of the heating surface of the suspension part in real time by the following formula;

[0016] ;

[0017] Where U1 is the convective heat release coefficient on the flue gas side, U2 is the radiation heat release coefficient, U3 is the convective heat release coefficient on the steam side, A is the heating area, ΔT is the logarithmic mean temperature difference, and Q is the amount of heat absorbed.

[0018] In some embodiments of the present application, the fouling calculation unit is used to calculate the fouling degree coefficient K of the furnace part in real time by the following formula;

[0019] ;

[0020] In the formula, S is the design area of ​​the furnace, T is the flue gas temperature at the furnace outlet, and N is the effective heat relative to the furnace.

[0021] In some embodiments of the present application, the steam volume control unit is set with a fouling degree coefficient matrix T0 of the preset suspension part heating surface and a sootblowing steam volume matrix A of the preset sootblower. For the sootblowing steam volume matrix A of the preset sootblower, A(A1, A2, A3, A4) is set, wherein A1 is the sootblowing steam volume of the first preset sootblower, A2 is the sootblowing steam volume of the second preset sootblower, A3 is the sootblowing steam volume of the third preset sootblower, A4 is the sootblowing steam volume of the fourth preset sootblower, and A1<A2<A3<A4;

[0022] For the fouling degree coefficient matrix T0 of the preset suspension part heating surface, set T0(T01, T02, T03, T04), where T01 is the fouling degree coefficient of the first preset suspension part heating surface, T02 is the fouling degree coefficient of the second preset suspension part heating surface, T03 is the fouling degree coefficient of the third preset suspension part heating surface, T04 is the fouling degree coefficient of the fourth preset suspension part heating surface, and T01<T02<T03<T04;

[0023] The steam flow control unit is used to select the corresponding sootblowing steam flow as the sootblowing steam flow of the sootblower according to the relationship between the fouling degree coefficient k of the heating surface of the suspension part and the fouling degree coefficient matrix T0 of the preset heating surface of the suspension part as the steam flow control unit;

[0024] When k<T01, the sootblowing steam volume A1 of the first preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower;

[0025] When T01≤k<T02, the sootblowing steam volume A2 of the second preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower;

[0026] When T02≤k<T03, the sootblowing steam volume A3 of the third preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower;

[0027] When T03≤k<T04, the sootblowing steam volume A4 of the fourth preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower.

[0028] In some embodiments of the present application, the steam volume control unit is also set with a fouling degree coefficient matrix V0 of a preset furnace part and a sootblowing steam volume correction coefficient matrix B of a preset sootblower. For the sootblowing steam volume correction coefficient matrix B of the preset sootblower, B(B1, B2, B3, B4) is set, where B1 is the first preset sootblowing steam volume correction coefficient, B2 is the second preset sootblowing steam volume correction coefficient, B3 is the third preset sootblowing steam volume correction coefficient, and B4 is the fourth preset sootblowing steam volume correction coefficient. number, and 1<B1<B2<B3<B4<1.6; for the fouling degree coefficient matrix V0 of the preset furnace part, set V0(V01,V02,V03,V04), where V01 is the fouling degree coefficient of the first preset furnace part, V02 is the fouling degree coefficient of the second preset furnace part, V03 is the fouling degree coefficient of the third preset furnace part, V04 is the fouling degree coefficient of the fourth preset furnace part, and V01<V02<V03<V04;

[0029] The steam flow control unit is used to select a corresponding correction coefficient according to the relationship between the fouling degree coefficient K of the furnace part and the fouling degree coefficient matrix V0 of the preset furnace part to correct the sootblowing steam flow of each preset sootblower;

[0030] When K<V01, the first preset sootblowing steam volume correction coefficient B1 is selected to correct the sootblowing steam volume A1 of the first preset sootblower, and the corrected sootblowing steam volume of the sootblower is A1*B1;

[0031] When V01≤K<V02, the second preset sootblowing steam volume correction coefficient B2 is selected to correct the sootblowing steam volume A2 of the second preset sootblower, and the corrected sootblowing steam volume of the sootblower is A2*B2;

[0032] When V02≤K<V03, the third preset sootblowing steam volume correction coefficient B3 is selected to correct the sootblowing steam volume A3 of the third preset sootblower, and the corrected sootblowing steam volume of the sootblower is A3*B3;

[0033] When V03≤K<V04, the fourth preset sootblowing steam volume correction coefficient B4 is selected to correct the sootblowing steam volume A4 of the fourth preset sootblower, and the corrected sootblowing steam volume of the sootblower is A4*B4.

[0034] In some embodiments of the present application, the steam volume control unit is further set with a preset flue gas volume matrix L0 and a preset sootblower sootblowing steam volume secondary correction coefficient matrix C. For the preset sootblower sootblowing steam volume secondary correction coefficient matrix C, C(C1, C2, C3, C4) is set, wherein C1 is the sootblowing steam volume secondary correction coefficient of the first preset sootblower, C2 is the sootblowing steam volume secondary correction coefficient of the second preset sootblower, C3 is the sootblowing steam volume secondary correction coefficient of the third preset sootblower, C4 is the sootblowing steam volume secondary correction coefficient of the fourth preset sootblower, and 1<C1<C2<C3<C4<1.2;

[0035] For the preset smoke volume matrix L0, set L0(L01, L02, L03, L04), where L01 is the first preset smoke volume, L02 is the second preset smoke volume, L03 is the third preset smoke volume, L04 is the fourth preset smoke volume, L01<L02<L03<L04;

[0036] The steam volume control unit is further used to select a corresponding secondary correction coefficient according to the relationship between the flue gas volume M and the preset flue gas volume matrix L0 to perform secondary correction on the sootblowing steam volume of the corrected sootblower;

[0037] When M<L01, the sootblowing steam volume secondary correction coefficient C1 of the first preset sootblower is selected to correct the sootblowing steam volume A1 of the first preset sootblower after correction, and the sootblowing steam volume of the corrected sootblower is A1*B1*C1;

[0038] When L02≤M<L02, the sootblowing steam volume secondary correction coefficient C2 of the second preset sootblower is selected to correct the sootblowing steam volume A2 of the second preset sootblower after correction, and the sootblowing steam volume of the corrected sootblower is A2*B2*C2;

[0039] When L02≤M<L03, the sootblowing steam volume secondary correction coefficient C3 of the third preset sootblower is selected to correct the sootblowing steam volume A3 of the third preset sootblower after correction, and the sootblowing steam volume of the corrected sootblower is A3*B3*C3;

[0040] When L03≤M<L04, the sootblowing steam volume secondary correction coefficient C4 of the fourth preset sootblower is selected to correct the corrected sootblowing steam volume A4 of the fourth preset sootblower, and the corrected sootblowing steam volume of the sootblower is A4*B4*C4.

[0041] In some embodiments of the present application, a preset boiler water spray volume standard value is also set in the steam volume control unit. The steam volume control unit is also used to determine that the boiler operating state is abnormal and start controlling the soot blower to perform soot blowing when the water spray volume acquired in real time by the furnace condition acquisition unit is less than the preset boiler water spray volume standard value.

[0042] In some embodiments of the present application, a preset boiler recirculating flue gas volume standard value is also set in the steam volume control unit. The steam volume control unit is also used to determine that the boiler operating state is abnormal and start controlling the soot blower to perform soot blowing when the recirculating flue gas volume acquired in real time by the furnace condition acquisition unit is less than the preset boiler recirculating flue gas volume standard value.

[0043] In some embodiments of the present application, there are multiple heat acquisition units and multiple temperature acquisition units.

[0044] In some embodiments of the present application, the steam volume control unit is a microprocessor.

[0045] The present invention provides a sootblower sootblowing steam automatic adjustment device, which has the following beneficial effects compared with the prior art:

[0046] The present invention determines the sootblowing steam volume of the sootblower by real-time acquisition and adjustment based on the heat absorption of the heating surface of the suspension part, the flue gas volume, the temperature of each part of the flue gas, the fouling degree coefficient of the heating surface of the suspension part, the fouling degree coefficient of the furnace part and the state parameters of the boiler, and automatically controls the sootblowing steam volume of the sootblower based on the judgment of the current status of the boiler. The sootblower sootblowing steam automatic adjustment device provided by the present invention is to maintain the efficiency and stability of the boiler, the boiler operation is reliable, and at the same time, the sootblower operation cost is reduced and manpower is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a functional block diagram of the automatic adjustment device for sootblowing steam quantity of the sootblower in the embodiment of the present invention. DETAILED DESCRIPTION

[0048] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a communication between the inner sides of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the prior art, since the boiler is required to be able to supply energy stably, coal-fired boilers must use various types of coal. In this case, since the amount of ash attached to the heating surface is different for different types of coal, when the soot blower is started according to the program control of the predetermined steam volume, insufficient steam will occur, and complete soot blowing will not be possible. There will also be problems such as excessive steam volume causing energy waste.

[0053] Therefore, the present invention provides an automatic adjustment device for the sootblowing steam volume of a sootblower. The present invention monitors and obtains the parameters that affect the sootblowing steam volume in the boiler in real time, and automatically adjusts the sootblowing steam volume of the sootblower in real time according to the relevant parameters to achieve the optimal sootblowing steam volume under different conditions.

[0054] See also Figure 1 As shown, the disclosed embodiment of the present invention provides a sootblower sootblowing steam automatic adjustment device, comprising:

[0055] A heat acquisition unit is used to obtain the heat absorption of the heating surface of the suspension part in real time;

[0056] A smoke acquisition unit, used to acquire the smoke volume M of the smoke in real time;

[0057] A temperature acquisition unit is used to obtain the temperature of each part of the flue gas in real time;

[0058] A fouling calculation unit is used to calculate the fouling degree coefficient k of the heating surface of the suspension part in real time, and is also used to calculate the fouling degree coefficient K of the furnace part in real time;

[0059] A furnace condition acquisition unit, used to acquire the state parameters of the boiler in real time, wherein the state parameters include the amount of water sprayed and the amount of recirculated flue gas;

[0060] The steam volume control unit is used to determine the sootblowing steam volume of the sootblower in real time according to the heat absorption of the heating surface of the suspension part, the flue gas volume, the temperature of each part of the flue gas, the fouling degree coefficient k of the heating surface of the suspension part, the fouling degree coefficient K of the furnace part and the state parameters of the boiler.

[0061] In a specific embodiment of the present application, the fouling calculation unit is used to calculate the fouling degree coefficient k of the heating surface of the suspension part in real time by the following formula;

[0062] ;

[0063] Where U1 is the convective heat release coefficient on the flue gas side, U2 is the radiation heat release coefficient, U3 is the convective heat release coefficient on the steam side, A is the heating area, ΔT is the logarithmic mean temperature difference, and Q is the amount of heat absorbed.

[0064] In a specific embodiment of the present application, the fouling calculation unit is used to calculate the fouling degree coefficient K of the furnace part in real time by the following formula;

[0065] ;

[0066] In the formula, S is the design area of ​​the furnace, T is the flue gas temperature at the furnace outlet, and N is the effective heat relative to the furnace.

[0067] In a specific embodiment of the present application, a fouling degree coefficient matrix T0 of a preset suspension heating surface and a sootblowing steam volume matrix A of a preset sootblower are set in the steam volume control unit. For the sootblowing steam volume matrix A of the preset sootblower, A(A1, A2, A3, A4) is set, wherein A1 is the sootblowing steam volume of the first preset sootblower, A2 is the sootblowing steam volume of the second preset sootblower, A3 is the sootblowing steam volume of the third preset sootblower, A4 is the sootblowing steam volume of the fourth preset sootblower, and A1<A2<A3<A4;

[0068] For the fouling degree coefficient matrix T0 of the preset suspension part heating surface, set T0(T01, T02, T03, T04), where T01 is the fouling degree coefficient of the first preset suspension part heating surface, T02 is the fouling degree coefficient of the second preset suspension part heating surface, T03 is the fouling degree coefficient of the third preset suspension part heating surface, T04 is the fouling degree coefficient of the fourth preset suspension part heating surface, and T01<T02<T03<T04;

[0069] The steam flow control unit is used to select the corresponding sootblowing steam flow as the steam flow control unit to control the sootblowing steam flow of the sootblower according to the relationship between the fouling degree coefficient k of the heating surface of the suspension part and the preset fouling degree coefficient matrix T0 of the heating surface of the suspension part;

[0070] When k<T01, the sootblowing steam volume A1 of the first preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower;

[0071] When T01≤k<T02, the sootblowing steam volume A2 of the second preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower;

[0072] When T02≤k<T03, the sootblowing steam volume A3 of the third preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower;

[0073] When T03≤k<T04, the sootblowing steam volume A4 of the fourth preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower.

[0074] In a specific embodiment of the present application, a fouling degree coefficient matrix V0 of a preset furnace part and a sootblowing steam volume correction coefficient matrix B of a preset sootblower are also set in the steam volume control unit. For the sootblowing steam volume correction coefficient matrix B of the preset sootblower, B(B1, B2, B3, B4) is set, where B1 is the first preset sootblowing steam volume correction coefficient, B2 is the second preset sootblowing steam volume correction coefficient, B3 is the third preset sootblowing steam volume correction coefficient, and B4 is the fourth preset sootblowing steam volume correction coefficient. number, and 1<B1<B2<B3<B4<1.6; for the fouling degree coefficient matrix V0 of the preset furnace part, set V0(V01,V02,V03,V04), where V01 is the fouling degree coefficient of the first preset furnace part, V02 is the fouling degree coefficient of the second preset furnace part, V03 is the fouling degree coefficient of the third preset furnace part, V04 is the fouling degree coefficient of the fourth preset furnace part, and V01<V02<V03<V04;

[0075] The steam flow control unit is used to select a corresponding correction coefficient according to the relationship between the fouling degree coefficient K of the furnace part and the fouling degree coefficient matrix V0 of the preset furnace part to correct the sootblowing steam flow of each preset sootblower;

[0076] When K<V01, the first preset sootblowing steam volume correction coefficient B1 is selected to correct the sootblowing steam volume A1 of the first preset sootblower, and the corrected sootblowing steam volume of the sootblower is A1*B1;

[0077] When V01≤K<V02, the second preset sootblowing steam volume correction coefficient B2 is selected to correct the sootblowing steam volume A2 of the second preset sootblower, and the corrected sootblowing steam volume of the sootblower is A2*B2;

[0078] When V02≤K<V03, the third preset sootblowing steam volume correction coefficient B3 is selected to correct the sootblowing steam volume A3 of the third preset sootblower, and the corrected sootblowing steam volume of the sootblower is A3*B3;

[0079] When V03≤K<V04, the fourth preset sootblowing steam volume correction coefficient B4 is selected to correct the sootblowing steam volume A4 of the fourth preset sootblower, and the corrected sootblowing steam volume of the sootblower is A4*B4.

[0080] In a specific embodiment of the present application, a preset flue gas volume matrix L0 and a preset sootblower sootblowing steam volume secondary correction coefficient matrix C are also set in the steam volume control unit. For the preset sootblower sootblowing steam volume secondary correction coefficient matrix C, C(C1, C2, C3, C4) is set, wherein C1 is the sootblowing steam volume secondary correction coefficient of the first preset sootblower, C2 is the sootblowing steam volume secondary correction coefficient of the second preset sootblower, C3 is the sootblowing steam volume secondary correction coefficient of the third preset sootblower, C4 is the sootblowing steam volume secondary correction coefficient of the fourth preset sootblower, and 1<C1<C2<C3<C4<1.2;

[0081] For the preset smoke volume matrix L0, set L0(L01, L02, L03, L04), where L01 is the first preset smoke volume, L02 is the second preset smoke volume, L03 is the third preset smoke volume, L04 is the fourth preset smoke volume, L01<L02<L03<L04;

[0082] The steam volume control unit is also used to select a corresponding secondary correction coefficient according to the relationship between the flue gas volume M and the preset flue gas volume matrix L0 to perform secondary correction on the sootblowing steam volume of the corrected sootblower;

[0083] When M<L01, the sootblowing steam volume secondary correction coefficient C1 of the first preset sootblower is selected to correct the sootblowing steam volume A1 of the corrected first preset sootblower, and the sootblowing steam volume of the corrected sootblower is A1*B1*C1;

[0084] When L02≤M<L02, the sootblowing steam volume secondary correction coefficient C2 of the second preset sootblower is selected to correct the sootblowing steam volume A2 of the corrected second preset sootblower, and the sootblowing steam volume of the corrected sootblower is A2*B2*C2;

[0085] When L02≤M<L03, the sootblowing steam volume secondary correction coefficient C3 of the third preset sootblower is selected to correct the sootblowing steam volume A3 of the corrected third preset sootblower, and the sootblowing steam volume of the corrected sootblower is A3*B3*C3;

[0086] When L03≤M<L04, the sootblowing steam volume secondary correction coefficient C4 of the fourth preset sootblower is selected to correct the corrected sootblowing steam volume A4 of the fourth preset sootblower, and the corrected sootblowing steam volume of the sootblower is A4*B4*C4.

[0087] In a specific embodiment of the present application, a preset boiler water spray volume standard value is also set in the steam volume control unit. The steam volume control unit is also used to determine that the boiler operating state is abnormal and start controlling the soot blower to perform soot blowing when the water spray volume acquired in real time by the furnace condition acquisition unit is less than the preset boiler water spray volume standard value.

[0088] In a specific embodiment of the present application, a preset boiler recirculating flue gas volume standard value is also set in the steam volume control unit. The steam volume control unit is also used to determine that the boiler operating state is abnormal and start controlling the soot blower to perform soot blowing when the recirculating flue gas volume acquired in real time by the furnace condition acquisition unit is less than the preset boiler recirculating flue gas volume standard value.

[0089] In a specific embodiment of the present application, there are multiple heat acquisition units and temperature acquisition units.

[0090] In a specific embodiment of the present application, the steam volume control unit is a microprocessor.

[0091] According to the first technical concept of the present invention, the present invention automatically adjusts and controls the sootblowing steam volume of the sootblower by calculating the fouling degree coefficient of the heating surface of the suspension part in real time, and makes a corrective adjustment to the sootblowing steam volume in combination with the fouling degree coefficient of the furnace part, so that the sootblower is suitable for adjusting the sootblowing steam volume under any circumstances, thereby improving the efficiency of the sootblowing work and avoiding unnecessary energy consumption.

[0092] According to the second technical concept of the present invention, the present invention uses a microprocessor. While having the original large-scale computer control program functions, the microprocessor also has the advantages of small size, high reliability and simple structure. The microprocessor mostly adopts a modular hardware structure. The functional components in the system are connected through standardized slots and interfaces. Users can construct microcomputer systems of different requirements and scales by selecting different functional components and corresponding peripheral devices.

[0093] In summary, the present invention determines the sootblowing steam volume of the sootblower by real-time acquisition and adjustment based on the heat absorption of the heating surface of the suspension part, the flue gas volume, the temperature of each part of the flue gas, the fouling degree coefficient of the heating surface of the suspension part, the fouling degree coefficient of the furnace part and the state parameters of the boiler, and automatically controls the sootblowing steam volume of the sootblower based on the judgment of the current status of the boiler. The automatic adjustment device for sootblowing steam volume of the sootblower provided by the present invention is to maintain the efficiency and stability of the boiler, the reliable operation of the boiler, reduce the operating cost of the sootblower, and save manpower.

[0094] The above is only an example of implementation of the present invention, but it cannot be used to limit the scope of the present invention. Any structural changes made according to the present invention should be regarded as falling within the protection scope of the present invention and subject to restrictions as long as they do not lose the essence of the present invention.

[0095] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the system described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0096] It should be noted that the system provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiments can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0097] Those skilled in the art should be able to appreciate that the modules and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two, and the programs corresponding to the software modules and method steps can be placed in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0098] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0099] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A sootblower sootblowing steam automatic adjustment device, characterized in that: include: A heat acquisition unit is used to obtain the heat absorption of the heating surface of the suspension part in real time; A smoke acquisition unit, used to acquire the smoke volume M of the smoke in real time; A temperature acquisition unit, used to acquire the temperature of the flue gas in each part in real time; A fouling calculation unit, used for calculating the fouling degree coefficient k of the heating surface of the suspension part in real time, and also used for calculating the fouling degree coefficient K of the furnace part in real time; A furnace condition acquisition unit, used to acquire the state parameters of the boiler in real time, wherein the state parameters include the amount of water sprayed and the amount of recirculated flue gas; A steam quantity control unit, for determining the sootblowing steam quantity of the sootblower in real time according to the heat absorption of the heating surface of the suspension part, the flue gas quantity of the flue gas, the temperature of the flue gas in each part, the fouling degree coefficient k of the heating surface of the suspension part, the fouling degree coefficient K of the furnace part and the state parameters of the boiler; The steam volume control unit is set with a fouling coefficient matrix T0 of the preset suspension heating surface and a sootblowing steam volume matrix A of the preset sootblower. For the sootblowing steam volume matrix A of the preset sootblower, A(A1, A2, A3, A4) is set, wherein A1 is the sootblowing steam volume of the first preset sootblower, A2 is the sootblowing steam volume of the second preset sootblower, A3 is the sootblowing steam volume of the third preset sootblower, A4 is the sootblowing steam volume of the fourth preset sootblower, and A1<A2<A3<A4; For the fouling degree coefficient matrix T0 of the preset suspension part heating surface, set T0(T01, T02, T03, T04), where T01 is the fouling degree coefficient of the first preset suspension part heating surface, T02 is the fouling degree coefficient of the second preset suspension part heating surface, T03 is the fouling degree coefficient of the third preset suspension part heating surface, T04 is the fouling degree coefficient of the fourth preset suspension part heating surface, and T01<T02<T03<T04; The steam flow control unit is used to select the corresponding sootblowing steam flow as the sootblowing steam flow of the sootblower according to the relationship between the fouling degree coefficient k of the heating surface of the suspension part and the fouling degree coefficient matrix T0 of the preset heating surface of the suspension part as the steam flow control unit; When k<T01, the sootblowing steam volume A1 of the first preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower; When T01≤k<T02, the sootblowing steam volume A2 of the second preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower; When T02≤k<T03, the sootblowing steam volume A3 of the third preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower; When T03≤k<T04, the sootblowing steam volume A4 of the fourth preset sootblower is selected as the steam volume control unit to control the sootblowing steam volume of the sootblower.

2. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: The fouling calculation unit is used to calculate the fouling degree coefficient k of the heating surface of the suspension part in real time by the following formula; ； Where U1 is the convective heat release coefficient on the flue gas side, U2 is the radiation heat release coefficient, U3 is the convective heat release coefficient on the steam side, A is the heating area, ΔT is the logarithmic mean temperature difference, and Q is the amount of heat absorbed.

3. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: The fouling calculation unit is used to calculate the fouling degree coefficient K of the furnace part in real time by the following formula; ； In the formula, S is the design area of ​​the furnace, T is the flue gas temperature at the furnace outlet, and N is the effective heat relative to the furnace.

4. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: The steam control unit is also set with a fouling degree coefficient matrix V0 of a preset furnace part and a sootblowing steam correction coefficient matrix B of a preset sootblower. For the sootblowing steam correction coefficient matrix B of the preset sootblower, B(B1, B2, B3, B4) is set, where B1 is a first preset sootblowing steam correction coefficient, B2 is a second preset sootblowing steam correction coefficient, B3 is a third preset sootblowing steam correction coefficient, B4 is a fourth preset sootblowing steam correction coefficient, and 1<B 1<B2<B3<B4<1.6; for the fouling degree coefficient matrix V0 of the preset furnace part, set V0(V01, V02, V03, V04), wherein V01 is the fouling degree coefficient of the first preset furnace part, V02 is the fouling degree coefficient of the second preset furnace part, V03 is the fouling degree coefficient of the third preset furnace part, V04 is the fouling degree coefficient of the fourth preset furnace part, and V01<V02<V03<V04; The steam flow control unit is used to select a corresponding correction coefficient according to the relationship between the fouling degree coefficient K of the furnace part and the fouling degree coefficient matrix V0 of the preset furnace part to correct the sootblowing steam flow of each preset sootblower; When K<V01, the first preset sootblowing steam volume correction coefficient B1 is selected to correct the sootblowing steam volume A1 of the first preset sootblower, and the corrected sootblowing steam volume of the sootblower is A1*B1; When V01≤K<V02, the second preset sootblowing steam volume correction coefficient B2 is selected to correct the sootblowing steam volume A2 of the second preset sootblower, and the corrected sootblowing steam volume of the sootblower is A2*B2; When V02≤K<V03, the third preset sootblowing steam volume correction coefficient B3 is selected to correct the sootblowing steam volume A3 of the third preset sootblower, and the corrected sootblowing steam volume of the sootblower is A3*B3; When V03≤K<V04, the fourth preset sootblowing steam volume correction coefficient B4 is selected to correct the sootblowing steam volume A4 of the fourth preset sootblower, and the corrected sootblowing steam volume of the sootblower is A4*B4.

5. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 4, characterized in that: The steam volume control unit is also set with a preset flue gas volume matrix L0 and a sootblowing steam volume secondary correction coefficient matrix C of a preset sootblower. For the sootblowing steam volume secondary correction coefficient matrix C of the preset sootblower, C(C1, C2, C3, C4) is set, wherein C1 is the sootblowing steam volume secondary correction coefficient of the first preset sootblower, C2 is the sootblowing steam volume secondary correction coefficient of the second preset sootblower, C3 is the sootblowing steam volume secondary correction coefficient of the third preset sootblower, C4 is the sootblowing steam volume secondary correction coefficient of the fourth preset sootblower, and 1<C1<C2<C3<C4<1.2; For the preset smoke volume matrix L0, set L0(L01, L02, L03, L04), where L01 is the first preset smoke volume, L02 is the second preset smoke volume, L03 is the third preset smoke volume, L04 is the fourth preset smoke volume, L01<L02<L03<L04; The steam volume control unit is further used to select a corresponding secondary correction coefficient according to the relationship between the flue gas volume M and the preset flue gas volume matrix L0 to perform secondary correction on the sootblowing steam volume of the corrected sootblower; When M<L01, the sootblowing steam volume secondary correction coefficient C1 of the first preset sootblower is selected to correct the sootblowing steam volume A1 of the first preset sootblower after correction, and the sootblowing steam volume of the corrected sootblower is A1*B1*C1; When L02≤M<L02, the sootblowing steam volume secondary correction coefficient C2 of the second preset sootblower is selected to correct the sootblowing steam volume A2 of the second preset sootblower after correction, and the sootblowing steam volume of the corrected sootblower is A2*B2*C2; When L02≤M<L03, the sootblowing steam volume secondary correction coefficient C3 of the third preset sootblower is selected to correct the sootblowing steam volume A3 of the third preset sootblower after correction, and the sootblowing steam volume of the corrected sootblower is A3*B3*C3; When L03≤M<L04, the sootblowing steam volume secondary correction coefficient C4 of the fourth preset sootblower is selected to correct the corrected sootblowing steam volume A4 of the fourth preset sootblower, and the corrected sootblowing steam volume of the sootblower is A4*B4*C4.

6. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: A preset boiler water spray volume standard value is also set in the steam volume control unit. The steam volume control unit is also used to determine that the boiler operating state is abnormal and start controlling the soot blower to perform soot blowing when the water spray volume acquired in real time by the furnace condition acquisition unit is less than the preset boiler water spray volume standard value.

7. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: A preset boiler recirculating flue gas volume standard value is also set in the steam volume control unit. The steam volume control unit is also used to determine that the boiler operating state is abnormal and start controlling the soot blower to perform soot blowing when the recirculating flue gas volume acquired in real time by the furnace condition acquisition unit is less than the preset boiler recirculating flue gas volume standard value.

8. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: There are multiple heat acquisition units and multiple temperature acquisition units.

9. The automatic adjustment device for sootblowing steam volume of a sootblower according to claim 1, characterized in that: The steam volume control unit is a microprocessor.

Images