A comprehensive automatic control system for a boiler

Abstract

The application discloses a boiler comprehensive automatic control system, which comprises a monitoring unit for monitoring water vapor pressure, water vapor flow, fuel concentration and oxygen concentration in a boiler; a fuel quantity adjusting unit for adjusting the fuel quantity entering into the boiler according to the water vapor pressure in the boiler; an air quantity adjusting unit for adjusting the air quantity entering into the boiler according to the oxygen concentration entering into the boiler; a water level adjusting unit for adjusting the water level in the boiler according to the water vapor flow in the boiler; and a control unit for automatically controlling the working states of the fuel quantity adjusting unit, the air quantity adjusting unit and the water level adjusting unit according to the data detected by the monitoring unit. The application realizes accurate regulation and control of multiple units by real-time monitoring of various parameter conditions in the boiler through the monitoring unit and accurate control of the working of each unit through the control unit, so that the combustion efficiency of the boiler is greatly improved, and safe, stable, environment-friendly and economic operation of the boiler is ensured.

Description

A boiler integrated automatic control system Technical Field

[0001] This invention relates to the field of boiler control technology, and in particular to a comprehensive automatic control system for boilers. Background Technology

[0002] Boilers are commonly used equipment in both domestic and industrial settings. Currently, most industrial boilers still operate with high energy consumption, significant waste, and severe environmental pollution. Because boilers often operate under high temperature and pressure conditions, they are inherently dangerous equipment. During boiler operation, it is crucial to constantly monitor their status, such as whether operating data like air pressure, temperature, and liquid level are normal. If abnormal data is detected, the boiler's status must be adjusted promptly to prevent accidents. A major problem with existing boiler automation control systems is their inability to precisely control the operating status of individual boiler units based on detected data, resulting in low combustion efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing boiler automatic control system cannot accurately regulate the working status of each unit of the boiler based on the detected data.

[0004] To solve the above-mentioned technical problems, the present invention provides a comprehensive automatic control system for boilers, comprising:

[0005] A monitoring unit is installed on the boiler, and the monitoring unit is used to monitor the steam pressure, steam flow rate, fuel concentration and oxygen concentration inside the boiler;

[0006] A fuel quantity regulating unit is connected to the boiler, and the fuel quantity regulating unit is used to regulate the amount of fuel entering the boiler according to the steam pressure inside the boiler.

[0007] An air volume regulating unit is connected to the boiler, and the air volume regulating unit is used to regulate the air volume entering the boiler according to the oxygen concentration entering the boiler;

[0008] A water level regulating unit is connected to the boiler, and the water level regulating unit is used to regulate the water level in the boiler according to the steam flow rate in the boiler.

[0009] The control unit is installed on the boiler and is connected to the monitoring unit, fuel quantity regulation unit, air volume regulation unit and water level regulation unit respectively. The control unit is used to automatically control the working status of the fuel quantity regulation unit, air volume regulation unit and water level regulation unit according to the data detected by the monitoring unit.

[0010] Furthermore, the monitoring unit includes:

[0011] A steam pressure detector is used to detect the pressure of steam inside the boiler;

[0012] A steam flow meter is used to detect the flow rate of steam entering the boiler.

[0013] A fuel concentration detector is used to detect the fuel concentration entering the boiler;

[0014] An oxygen concentration detector is used to detect the oxygen concentration entering the boiler.

[0015] The fuel quantity regulating unit includes:

[0016] A coal bunker is located outside the boiler and is used to store fuel.

[0017] A blower is connected between the boiler and the coal bunker, and the blower is used to input fuel from the coal bunker into the boiler;

[0018] The air volume regulating unit includes:

[0019] An induced draft fan is connected to the boiler and is used to introduce airflow into the boiler.

[0020] The water level regulation includes:

[0021] A water storage tank is located outside the boiler and is used to store water.

[0022] A water pump is connected between the boiler and the water storage tank, and the water pump is used to input water from the water storage tank into the boiler.

[0023] The control unit includes:

[0024] The data acquisition module is connected to the steam pressure detector, steam flow detector, fuel concentration detector, and oxygen concentration detector, respectively. The data acquisition module is used to acquire the data detected by the steam pressure detector, steam flow detector, fuel concentration detector, and oxygen concentration detector.

[0025] A processing module, connected to the acquisition module, is used to process the detected data;

[0026] The control module is connected to the blower, vent, induced draft fan, and water pump respectively, and is also connected to the processing module. The control module is used to control the operation of the blower, vent, induced draft fan, and water pump.

[0027] Furthermore, the acquisition module is used to acquire the steam pressure ΔG inside the boiler, and the control module is used to control the fuel quantity regulating unit;

[0028] The processing module is used to set a preset value G0 for the steam pressure in the boiler. The processing module is also used to set the steam pressure difference g1, g2, g3 and g4 in the first preset boiler, the second preset boiler, the third preset boiler, and the fourth preset boiler, where g1 < g2 < g3 < g4. The processing module is also used to set a first preset working condition matrix A1 (a1, b1), a second preset working condition matrix A2 (a2, b2), a third preset working condition matrix A3 (a3, b3) and a fourth preset working condition matrix A4 (a4, b4), where a1 to a4 are the working frequencies of the first to fourth preset blowers, where a1 < a2 < a3 < a4, and b1 to b4 are the working durations of the first to fourth preset blowers, where b1 < b2 < b3 < b4.

[0029] The preset operating condition matrix Ai is selected as the operating condition of the fuel quantity regulating unit based on the difference between the collected steam pressure ΔG inside the boiler and the preset steam pressure G0 inside the boiler.

[0030] When △G-G0≤g1, the first preset working condition matrix A1 is selected as the working condition of the fuel quantity adjustment unit;

[0031] When g1 < △G-G0 ≤ g2, the second preset working condition matrix A2 is selected as the working condition of the fuel quantity adjustment unit;

[0032] When g2 < △G - G0 ≤ g3, the third preset working condition matrix A3 is selected as the working condition of the fuel quantity adjustment unit;

[0033] When g3 < △G - G0 ≤ g4, the fourth preset working condition matrix A4 is selected as the working condition of the fuel quantity adjustment unit.

[0034] When the i-th preset working condition matrix Ai is selected as the working condition of the fuel quantity adjustment unit, the control module controls the blower to work at the i-th preset frequency ai, and the control module also controls the blower to work at the i-th preset duration bi, i = 1, 2, 3, 4.

[0035] Furthermore, the processing module is also used to set a first preset fuel concentration T1, a second preset fuel concentration T2, a third preset fuel concentration T3, and a fourth preset fuel concentration T4 entering the boiler, where T1 < T2 < T3 < T4; the processing module is also used to set a first preset correction coefficient m1, a second preset correction coefficient m2, a third preset correction coefficient m3, and a fourth preset correction coefficient m4, where 0.8 < m1 < m2 < m3 < m4 < 1;

[0036] The acquisition module is further used to acquire the fuel concentration ΔT entering the boiler. The processing module is further used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition matrix Ai when the i-th preset working condition matrix Ai is selected as the working condition of the fuel quantity adjustment unit, based on the relationship between the fuel concentration ΔT entering the boiler and each preset fuel concentration T entering the boiler.

[0037] When △T≤T1, the working conditions in the i-th preset working condition matrix Ai are not modified.

[0038] When T1 < △T ≤ T2, the first preset correction coefficient m1 is selected to correct Ai, and the corrected result is Ai(ai*m1, bi*m1);

[0039] When T2 < △T ≤ T3, the second preset correction coefficient m2 is selected to correct Ai, and the corrected result is Ai(ai*m2, bi*m2);

[0040] When T3 < △T ≤ T4, the third preset correction coefficient m3 is selected to correct Ai, and the corrected result is Ai(ai*m3, bi*m3);

[0041] When T4 < △T, the fourth preset correction coefficient m4 is selected to correct Ai, and the corrected result is Ai(ai*m4, bi*m4).

[0042] Furthermore, the acquisition module is also used to acquire the oxygen concentration ΔS in the boiler in real time, and the control module is used to control the air volume adjustment unit;

[0043] The acquisition module is used to set a preset oxygen concentration value S0 in the boiler. The acquisition module is also used to set the oxygen concentration difference s1, s2, s3, and s4 in the first preset boiler, and s4 in the second preset boiler, and s1 < s2 < s3 < s4. The processing module is also used to set a first preset working condition matrix W1(d1, e1), a second preset working condition matrix W2(d2, e2), a third preset working condition matrix W3(d3, e3), and a fourth preset working condition matrix W4(d4, e4), where d1 to d4 are the working frequencies of the first to fourth preset induced draft fans, and d1 < d2 < d3 < d4, and e1 to e4 are the working durations of the first to fourth preset induced draft fans, and e1 < e2 < e3 < e4.

[0044] The preset working condition matrix Wi is selected as the working condition of the air volume regulating unit based on the difference between the collected oxygen concentration ΔS in the boiler and the preset oxygen concentration S0 in the boiler.

[0045] When △S-S0≤s1, the first preset working condition matrix W1 is selected as the working condition of the air volume regulating unit.

[0046] When s1 < △S-S0 ≤ s2, the second preset working condition matrix W2 is selected as the working condition of the air volume regulating unit.

[0047] When s2 < △S - S0 ≤ s3, the third preset working condition matrix W3 is selected as the working condition of the air volume regulating unit.

[0048] When s3 < △S - S0 ≤ s4, the fourth preset working condition matrix W4 is selected as the working condition of the air volume regulating unit.

[0049] When the i-th preset working condition matrix Wi is selected as the working condition of the air volume adjustment unit, the control module controls the induced draft fan to work at the i-th preset frequency di, and the control module controls the induced draft fan to work at the i-th preset duration ei, i = 1, 2, 3, 4.

[0050] Furthermore, the acquisition module is also used to acquire the steam flow rate ΔM flowing into the boiler in real time, and the control module is used to control the water level regulating unit;

[0051] The acquisition module is used to set a preset value M0 for the steam flow rate flowing into the boiler. The acquisition module is also used to set a first preset steam flow rate difference m1, a second preset steam flow rate difference m2, a third preset steam flow rate difference m3, and a fourth preset steam flow rate difference m4, where m1 < m2 < m3 < m4. The processing module is also used to set a first preset working condition matrix L1(f1, h1), a second preset working condition matrix L2(f2, h2), a third preset working condition matrix L3(f3, h3), and a fourth preset working condition matrix L4(f4, h4), where f1 to f4 are the working frequencies of the first to fourth preset feedwater pumps, where f1 < f2 < f3 < f4, and h1 to h4 are the working durations of the first to fourth preset feedwater pumps, where h1 < h2 < h3 < h4.

[0052] The preset operating condition matrix Li is selected as the operating condition of the water level regulating unit based on the difference between the collected steam flow rate ΔM flowing into the boiler and the preset steam flow rate M0 flowing into the boiler.

[0053] When △M-M0≤m1, the first preset working condition matrix L1 is selected as the working condition of the water level regulating unit.

[0054] When m1 < △M-M0 ≤ m2, the second preset working condition matrix L2 is selected as the working condition of the water level regulating unit.

[0055] When m2 < △M - M0 ≤ m3, the third preset working condition matrix L3 is selected as the working condition of the water level regulating unit.

[0056] When m3 < △M - M0 ≤ m4, the fourth preset working condition matrix L4 is selected as the working condition of the water level regulating unit.

[0057] When the i-th preset working condition matrix Li is selected as the working condition of the water level regulating unit, the control module controls the water pump to work at the i-th preset frequency fi, and the control module controls the water pump to work at the i-th preset duration hi, i = 1, 2, 3, 4.

[0058] Furthermore, the airflow regulating unit also includes:

[0059] A vent is provided on the boiler and is used to regulate the airflow inside and outside the boiler.

[0060] Furthermore, the integrated automatic control system for the boiler also includes:

[0061] An alarm unit is installed on the boiler and connected to the control unit. The alarm unit is used to issue alarm information when abnormal parameters occur in the boiler.

[0062] Compared with the prior art, the boiler integrated automatic control system of this invention has the following advantages:

[0063] This invention monitors various parameters inside the boiler in real time through a monitoring unit and precisely controls the operation of each unit through a control unit, achieving precise regulation of multiple units. This will significantly improve the boiler's combustion efficiency and ensure safe, stable, environmentally friendly, and economical operation. Attached Figure Description

[0064] Figure 1 is a schematic diagram of the integrated automatic control system for boilers in an embodiment of the present invention;

[0065] Figure 2 is a schematic diagram of the detection unit of the boiler integrated automatic control system in an embodiment of the present invention;

[0066] Figure 3 is a schematic diagram of the structure of the control unit of the integrated automatic control system for boilers in an embodiment of the present invention;

[0067] Figure 4 is a schematic diagram of the connection and control of the control module of the integrated automatic control system for boilers in an embodiment of the present invention. Detailed Implementation

[0068] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0069] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0070] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0072] As shown in Figures 1-4, an embodiment of this application provides a comprehensive automatic control system for a boiler, comprising: a monitoring unit, a fuel quantity regulation unit, an air volume regulation unit, a water level regulation unit, and a control unit; the monitoring unit is disposed on the boiler and is used to monitor the steam pressure, steam flow rate, fuel concentration, and oxygen concentration inside the boiler; the fuel quantity regulation unit is connected to the boiler and is used to regulate the amount of fuel entering the boiler according to the steam pressure inside the boiler; the air volume regulation unit is connected to the boiler and is used to regulate the air volume entering the boiler according to the oxygen concentration inside the boiler; the water level regulation unit is connected to the boiler and is used to regulate the water level inside the boiler according to the steam flow rate inside the boiler; the control unit is disposed on the boiler and is connected to the monitoring unit, the fuel quantity regulation unit, the air volume regulation unit, and the water level regulation unit respectively, and the control unit is used to automatically control the working status of the fuel quantity regulation unit, the air volume regulation unit, and the water level regulation unit according to the data detected by the monitoring unit.

[0073] Furthermore, by monitoring various parameters within the boiler in real time through the monitoring unit and precisely controlling the operation of each unit through the control unit, accurate regulation of multiple units is achieved, which will significantly improve the boiler's combustion efficiency and ensure the boiler's safe, stable, environmentally friendly, and economical operation.

[0074] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided. The monitoring unit includes: a steam pressure detector, a steam flow detector, a fuel concentration detector, and an oxygen concentration detector. The steam pressure detector is used to detect the pressure of steam in the boiler; the steam flow detector is used to detect the flow rate of steam entering the boiler; the fuel concentration detector is used to detect the fuel concentration entering the boiler; and the oxygen concentration detector is used to detect the oxygen concentration entering the boiler.

[0075] The fuel quantity regulating unit includes: a coal bunker located outside the boiler body for storing fuel; and a blower connected between the boiler body and the coal bunker for feeding fuel from the coal bunker into the boiler.

[0076] The air volume regulating unit includes an induced draft fan connected to the boiler body, which is used to input airflow into the boiler.

[0077] The water level regulation includes: a water storage tank located outside the boiler body for storing water; and a water pump connected between the boiler body and the water storage tank for feeding water from the water storage tank into the boiler.

[0078] The control unit includes: a data acquisition module connected to the steam pressure detector, steam flow detector, fuel concentration detector, and oxygen concentration detector, respectively, the data acquisition module being used to acquire data detected by the steam pressure detector, steam flow detector, fuel concentration detector, and oxygen concentration detector; a processing module connected to the data acquisition module, the processing module being used to process the detected data; and a control module connected to the blower, vent, induced draft fan, and water pump, the control module being connected to the processing module, the control module being used to control the operation of the blower, vent, induced draft fan, and water pump.

[0079] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided, wherein the acquisition module is used to acquire the steam pressure ΔG inside the boiler, and the control module is used to control the fuel quantity regulating unit;

[0080] The processing module is used to set a preset value G0 for the steam pressure in the boiler. The processing module is also used to set the steam pressure difference g1, g2, g3 and g4 in the first preset boiler, the second preset boiler, the third preset boiler, and the fourth preset boiler, where g1 < g2 < g3 < g4. The processing module is also used to set a first preset working condition matrix A1 (a1, b1), a second preset working condition matrix A2 (a2, b2), a third preset working condition matrix A3 (a3, b3) and a fourth preset working condition matrix A4 (a4, b4), where a1 to a4 are the working frequencies of the first to fourth preset blowers, where a1 < a2 < a3 < a4, and b1 to b4 are the working durations of the first to fourth preset blowers, where b1 < b2 < b3 < b4.

[0081] The preset operating condition matrix Ai is selected as the operating condition of the fuel quantity regulating unit based on the difference between the collected steam pressure ΔG inside the boiler and the preset steam pressure G0 inside the boiler.

[0082] When △G-G0≤g1, the first preset working condition matrix A1 is selected as the working condition of the fuel quantity adjustment unit;

[0083] When g1 < △G-G0 ≤ g2, the second preset working condition matrix A2 is selected as the working condition of the fuel quantity adjustment unit;

[0084] When g2 < △G - G0 ≤ g3, the third preset working condition matrix A3 is selected as the working condition of the fuel quantity adjustment unit;

[0085] When g3 < △G - G0 ≤ g4, the fourth preset working condition matrix A4 is selected as the working condition of the fuel quantity adjustment unit.

[0086] When the i-th preset working condition matrix Ai is selected as the working condition of the fuel quantity adjustment unit, the control module controls the blower to work at the i-th preset frequency ai, and the control module also controls the blower to work at the i-th preset duration bi, i = 1, 2, 3, 4.

[0087] Furthermore, since the amount of fuel required in the boiler is determined based on the steam pressure inside the boiler, the specific operating conditions of the fuel quantity regulating unit are selected based on the difference between the collected steam pressure inside the boiler and the preset steam pressure value inside the boiler. This allows the blower to accurately deliver the required amount of fuel into the boiler, ensuring the normal operation of the boiler.

[0088] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided. The processing module is further configured to set a first preset fuel concentration T1, a second preset fuel concentration T2, a third preset fuel concentration T3, and a fourth preset fuel concentration T4 entering the boiler, wherein T1 < T2 < T3 < T4; the processing module is further configured to set a first preset correction coefficient m1, a second preset correction coefficient m2, a third preset correction coefficient m3, and a fourth preset correction coefficient m4, wherein 0.8 < m1 < m2 < m3 < m4 < 1;

[0089] The acquisition module is further used to acquire the fuel concentration ΔT entering the boiler. The processing module is further used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition matrix Ai when the i-th preset working condition matrix Ai is selected as the working condition of the fuel quantity adjustment unit, based on the relationship between the fuel concentration ΔT entering the boiler and each preset fuel concentration T entering the boiler.

[0090] When △T≤T1, the working conditions in the i-th preset working condition matrix Ai are not modified.

[0091] When T1 < △T ≤ T2, the first preset correction coefficient m1 is selected to correct Ai, and the corrected result is Ai(ai*m1, bi*m1);

[0092] When T2 < △T ≤ T3, the second preset correction coefficient m2 is selected to correct Ai, and the corrected result is Ai(ai*m2, bi*m2);

[0093] When T3 < △T ≤ T4, the third preset correction coefficient m3 is selected to correct Ai, and the corrected result is Ai(ai*m3, bi*m3);

[0094] When T4 < △T, the fourth preset correction coefficient m4 is selected to correct Ai, and the corrected result is Ai(ai*m4, bi*m4).

[0095] Furthermore, since there may be a slight difference between the actual amount of fuel entering the boiler and the set amount of fuel entering the boiler, the operating conditions of the fuel quantity adjustment unit need to be corrected according to the actual fuel concentration entering the boiler, so that the amount of fuel entering the boiler can be more accurate.

[0096] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided. The acquisition module is further used to acquire the oxygen concentration ΔS in the boiler in real time, and the control module is used to control the air volume regulating unit.

[0097] The acquisition module is used to set a preset oxygen concentration value S0 in the boiler. The acquisition module is also used to set the oxygen concentration difference s1, s2, s3, and s4 in the first preset boiler, and s4 in the second preset boiler, and s1 < s2 < s3 < s4. The processing module is also used to set a first preset working condition matrix W1(d1, e1), a second preset working condition matrix W2(d2, e2), a third preset working condition matrix W3(d3, e3), and a fourth preset working condition matrix W4(d4, e4), where d1 to d4 are the working frequencies of the first to fourth preset induced draft fans, and d1 < d2 < d3 < d4, and e1 to e4 are the working durations of the first to fourth preset induced draft fans, and e1 < e2 < e3 < e4.

[0098] The preset working condition matrix Wi is selected as the working condition of the air volume regulating unit based on the difference between the collected oxygen concentration ΔS in the boiler and the preset oxygen concentration S0 in the boiler.

[0099] When △S-S0≤s1, the first preset working condition matrix W1 is selected as the working condition of the air volume regulating unit.

[0100] When s1 < △S-S0 ≤ s2, the second preset working condition matrix W2 is selected as the working condition of the air volume regulating unit.

[0101] When s2 < △S - S0 ≤ s3, the third preset working condition matrix W3 is selected as the working condition of the air volume regulating unit.

[0102] When s3 < △S - S0 ≤ s4, the fourth preset working condition matrix W4 is selected as the working condition of the air volume regulating unit.

[0103] When the i-th preset working condition matrix Wi is selected as the working condition of the air volume adjustment unit, the control module controls the induced draft fan to work at the i-th preset frequency di, and the control module controls the induced draft fan to work at the i-th preset duration ei, i = 1, 2, 3, 4.

[0104] Furthermore, since the required air volume in the boiler is determined based on the oxygen concentration in the boiler, the specific operating conditions of the air volume regulating unit are selected based on the difference between the collected oxygen concentration in the boiler and the preset oxygen concentration value in the boiler. This allows the induced draft fan to accurately deliver the required air volume into the boiler, ensuring the normal operation of the boiler.

[0105] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided. The acquisition module is further used to acquire the steam flow rate ΔM flowing into the boiler in real time, and the control module is used to control the water level regulating unit.

[0106] The acquisition module is used to set a preset value M0 for the steam flow rate flowing into the boiler. The acquisition module is also used to set a first preset steam flow rate difference m1, a second preset steam flow rate difference m2, a third preset steam flow rate difference m3, and a fourth preset steam flow rate difference m4, where m1 < m2 < m3 < m4. The processing module is also used to set a first preset working condition matrix L1(f1, h1), a second preset working condition matrix L2(f2, h2), a third preset working condition matrix L3(f3, h3), and a fourth preset working condition matrix L4(f4, h4), where f1 to f4 are the working frequencies of the first to fourth preset feedwater pumps, where f1 < f2 < f3 < f4, and h1 to h4 are the working durations of the first to fourth preset feedwater pumps, where h1 < h2 < h3 < h4.

[0107] The preset operating condition matrix Li is selected as the operating condition of the water level regulating unit based on the difference between the collected steam flow rate ΔM flowing into the boiler and the preset steam flow rate M0 flowing into the boiler.

[0108] When △M-M0≤m1, the first preset working condition matrix L1 is selected as the working condition of the water level regulating unit.

[0109] When m1 < △M-M0 ≤ m2, the second preset working condition matrix L2 is selected as the working condition of the water level regulating unit.

[0110] When m2 < △M - M0 ≤ m3, the third preset working condition matrix L3 is selected as the working condition of the water level regulating unit.

[0111] When m3 < △M - M0 ≤ m4, the fourth preset working condition matrix L4 is selected as the working condition of the water level regulating unit.

[0112] When the i-th preset working condition matrix Li is selected as the working condition of the water level regulating unit, the control module controls the water pump to work at the i-th preset frequency fi, and the control module controls the water pump to work at the i-th preset duration hi, i = 1, 2, 3, 4.

[0113] Furthermore, since the water level in the boiler is determined based on the steam flow rate into the boiler, the specific operating conditions of the water level regulating unit are selected based on the difference between the collected steam flow rate into the boiler and the preset steam flow rate into the boiler. This allows the water pump to accurately deliver the required amount of water into the boiler, thereby changing the water level and ensuring the normal operation of the boiler.

[0114] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided. The air volume adjustment unit further includes: a vent disposed on the boiler. The vent is used to adjust the airflow inside and outside the boiler. When the steam pressure of the boiler is high, the opening of the vent can be increased to reduce the steam pressure of the boiler. When the steam pressure of the boiler is low, the opening of the vent can be decreased to reduce the loss of steam from the boiler.

[0115] In an embodiment of this application, a comprehensive automatic control system for a boiler is provided. The comprehensive automatic control system for a boiler further includes an alarm unit disposed on the outside of the boiler and connected to the control unit. When the data parameters detected by the steam pressure detector, steam flow detector, fuel concentration detector and oxygen concentration detector inside the boiler are abnormal, the alarm unit sends alarm information to the command center so that relevant personnel can promptly detect the abnormality and perform relevant operations.

[0116] In summary, this invention provides a comprehensive automatic boiler control system, comprising: a monitoring unit installed inside the boiler for monitoring steam pressure, steam flow rate, fuel concentration, and oxygen concentration; a fuel quantity regulating unit connected to the boiler for regulating the amount of fuel entering the boiler based on the steam pressure; an airflow regulating unit connected to the boiler for regulating the airflow entering the boiler based on the oxygen concentration; a water level regulating unit connected to the boiler for regulating the water level based on the steam flow rate; and a control unit installed on the boiler and connected to the monitoring unit, fuel quantity regulating unit, airflow regulating unit, and water level regulating unit, for automatically controlling the operating status of the fuel quantity regulating unit, airflow regulating unit, and water level regulating unit based on the data detected by the monitoring unit. This invention achieves precise control of multiple units by using the monitoring unit to monitor various parameters inside the boiler in real time and the control unit to precisely control the operation of each unit, significantly improving the boiler's combustion efficiency and ensuring safe, stable, environmentally friendly, and economical boiler operation.

[0117] Finally, it should be noted that those skilled in the art can obviously make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0118] The above description is merely one embodiment of the present invention, and should not be construed as limiting the scope of the invention. Any structural changes made based on the present invention, as long as they do not depart from the essence of the invention, should be considered as falling within the protection scope of the present invention and subject to its restrictions. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the system described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0119] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0120] The technical solutions of the present invention have been described above with reference to the accompanying drawings and further embodiments. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles 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 such changes or substitutions will all fall within the scope of protection of the present invention.

[0121] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A comprehensive automatic control system for boilers, characterized in that, include: A monitoring unit is installed on the boiler, and the monitoring unit is used to monitor the steam pressure, steam flow rate, fuel concentration and oxygen concentration inside the boiler; A fuel quantity regulating unit, connected to the boiler, is used to regulate the amount of fuel entering the boiler according to the steam pressure inside the boiler; an air volume regulating unit, connected to the boiler, is used to regulate the air volume entering the boiler according to the oxygen concentration inside the boiler; a water level regulating unit, connected to the boiler, is used to regulate the water level inside the boiler according to the steam flow rate inside the boiler; a control unit, installed on the boiler and connected to the monitoring unit, fuel quantity regulating unit, air volume regulating unit, and water level regulating unit respectively, is used to automatically control the working status of the fuel quantity regulating unit, air volume regulating unit, and water level regulating unit according to the data detected by the monitoring unit. The monitoring unit includes: a steam pressure detector for detecting the pressure of steam inside the boiler; a steam flow detector for detecting the flow rate of steam entering the boiler; a fuel concentration detector for detecting the fuel concentration entering the boiler; and an oxygen concentration detector for detecting the oxygen concentration entering the boiler. The fuel quantity regulating unit includes: a coal bunker located outside the boiler for storing fuel; and a blower connected between the boiler and the coal bunker for feeding fuel from the coal bunker into the boiler. The airflow regulating unit includes: an induced draft fan connected to the boiler for feeding air into the boiler. The water level regulating unit includes: a storage... A water tank, located outside the boiler, is used to store water. A feedwater pump, connected between the boiler and the water tank, is used to pump water from the water tank into the boiler. The control unit includes: a data acquisition module connected to a steam pressure detector, a steam flow detector, a fuel concentration detector, and an oxygen concentration detector, respectively, for acquiring data detected by these detectors; a processing module connected to the data acquisition module, for processing the detected data; and a control module connected to the blower, vent, induced draft fan, and feedwater pump, respectively. The processing module is connected to the control module, which controls the operation of the blower, vent, induced draft fan, and feedwater pump; the acquisition module is used to acquire the steam pressure ΔG inside the boiler; the control module is used to control the fuel quantity adjustment unit; the processing module is used to set a preset value G0 for the steam pressure inside the boiler; the processing module is also used to set the steam pressure difference g1, g2, g3, and g4 inside the first, second, third, and fourth preset boilers, where g1 < g2 < g3 < g4; the processing module is also used to set a first preset operating condition matrix A1(a1, b1) and a second preset... The system comprises a working condition matrix A2 (a2, b2), a third preset working condition matrix A3 (a3, b3), and a fourth preset working condition matrix A4 (a4, b4), where a1 to a4 represent the working frequencies of the first to fourth preset blowers, respectively, with a1 < a2 < a3 < a4, and b1 to b4 represent the working durations of the first to fourth preset blowers, respectively, with b1 < b2 < b3 < b4. The preset working condition matrix Ai is selected as the working condition for the fuel quantity regulating unit based on the difference between the collected steam pressure ΔG in the boiler and the preset steam pressure G0 in the boiler. When ΔG - G0 ≤ g1, the first preset working condition matrix A1 is selected as the working condition for the fuel quantity regulating unit.When g1 < ΔG - G0 ≤ g2, the second preset working condition matrix A2 is selected as the working condition of the fuel quantity adjustment unit; when g2 < ΔG - G0 ≤ g3, the third preset working condition matrix A3 is selected as the working condition of the fuel quantity adjustment unit; when g3 < ΔG - G0 ≤ g4, the fourth preset working condition matrix A4 is selected as the working condition of the fuel quantity adjustment unit; wherein, when the i-th preset working condition matrix Ai is selected as the working condition of the fuel quantity adjustment unit, the control module controls the blower to operate at the i-th preset frequency ai, and the control module will also control the blower to operate for the i-th preset duration bi. i=1, 2, 3, 4; the processing module is also used to set a first preset fuel concentration T1, a second preset fuel concentration T2, a third preset fuel concentration T3, and a fourth preset fuel concentration T4 entering the boiler, where T1 < T2 < T3 < T4; the processing module is also used to set a first preset correction coefficient m1, a second preset correction coefficient m2, a third preset correction coefficient m3, and a fourth preset correction coefficient m4, where 0.8 < m1 < m2 < m3 < m4 < 1; the acquisition module is also used to acquire the fuel concentration entering the boiler. The processing module is further configured to, when selecting the i-th preset working condition matrix Ai as the working condition of the fuel quantity adjustment unit, select a preset correction coefficient based on the relationship between the fuel concentration △T entering the boiler and each preset fuel concentration T entering the boiler to correct the working conditions in the i-th preset working condition matrix Ai: when △T≤T1, the working conditions in the i-th preset working condition matrix Ai are not corrected; when T1<△T≤T2, the first preset correction coefficient m1 is selected to correct Ai, and the corrected result is Ai(ai); m1, bi m1); when T2<△T≤T3, the second preset correction coefficient m2 is selected to correct Ai, and the corrected value is Ai(ai). m2, bi m2); when T3 < △T ≤ T4, the third preset correction coefficient m3 is selected to correct Ai, and the corrected value is Ai (ai). m3, bi m3); when T4 < ΔT, the fourth preset correction coefficient m4 is selected to correct Ai, and the corrected value is Ai (ai). m4,bi The acquisition module is also used to acquire the oxygen concentration ΔS in the boiler in real time, and the control module is used to control the air volume adjustment unit; the acquisition module is used to set the preset value S0 of the oxygen concentration in the boiler, and the acquisition module is also used to set the first preset oxygen concentration difference s1, the second preset oxygen concentration difference s2, the third preset oxygen concentration difference s3 and the fourth preset oxygen concentration difference s4 in the boiler, and s1 < v2 < s3 < s4; the processing module is also used to set the first preset working condition matrix W1 (d1, e1) and the second preset working condition matrix W2 (d2, e2) The system comprises a third preset operating condition matrix W3 (d3, e3) and a fourth preset operating condition matrix W4 (d4, e4), where d1 to d4 represent the operating frequencies of the first to fourth preset induced draft fans, respectively, with d1 < d2 < d3 < d4, and e1 to e4 represent the operating durations of the first to fourth preset induced draft fans, respectively, with e1 < e2 < e3 < e4. The preset operating condition matrix W1 is selected as the operating condition for the airflow regulating unit based on the difference between the collected oxygen concentration ΔS in the boiler and the preset oxygen concentration S0 in the boiler. When ΔS - S0 ≤ s1, the first preset operating condition matrix W1 is selected as the operating condition for the airflow regulating unit. The operating conditions of the air volume regulating unit are as follows: when s1 < ΔS - S0 ≤ s2, the second preset operating condition matrix W2 is selected as the operating condition of the air volume regulating unit; when s2 < ΔS - S0 ≤ s3, the third preset operating condition matrix W3 is selected as the operating condition of the air volume regulating unit; when s3 < ΔS - S0 ≤ s4, the fourth preset operating condition matrix W4 is selected as the operating condition of the air volume regulating unit; wherein, when the i-th preset operating condition matrix Wi is selected as the operating condition of the air volume regulating unit, the control module controls the induced draft fan to operate at the i-th preset frequency di. The module controls the induced draft fan to operate for a preset duration ei, where i = 1, 2, 3, 4; the acquisition module is also used to collect the steam flow rate ΔM flowing into the boiler in real time; the control module is used to control the water level regulating unit; the acquisition module is used to set a preset value M0 for the steam flow rate flowing into the boiler; the acquisition module is also used to set a first preset steam flow rate difference m1, a second preset steam flow rate difference m2, a third preset steam flow rate difference m3, and a fourth preset steam flow rate difference m4, where m1 < m2 < m3 < m4;The processing module is further configured to set a first preset working condition matrix L1 (f1, h1), a second preset working condition matrix L2 (f2, h2), a third preset working condition matrix L3 (f3, h3), and a fourth preset working condition matrix L4 (f4, h4), wherein f1 to f4 are the working frequencies of the first to fourth preset feedwater pumps, respectively, and f1 < f2 < f3 < f4; h1 to h4 are the working durations of the first to fourth preset feedwater pumps, respectively, and h1 < h2 < h3 < h4; based on the difference between the collected steam flow rate ΔM flowing into the boiler and the preset value M0 of the steam flow rate flowing into the boiler, the preset working condition matrix L1 is selected as the working condition of the water level regulating unit; when ΔM - M0 ≤ m1, the first preset working condition matrix L1 is selected as the working condition of the water level regulating unit. Conditions: When m1 < ΔM - M0 ≤ m2, the second preset working condition matrix L2 is selected as the working condition of the water level regulating unit; when m2 < ΔM - M0 ≤ m3, the third preset working condition matrix L3 is selected as the working condition of the water level regulating unit; when m3 < ΔM - M0 ≤ m4, the fourth preset working condition matrix L4 is selected as the working condition of the water level regulating unit; wherein, when the i-th preset working condition matrix L1 is selected as the working condition of the water level regulating unit, the control module controls the water pump to operate at the i-th preset frequency fi, and the control module controls the water pump to operate for the i-th preset duration hi, i = 1, 2, 3, 4; the air volume regulating unit also includes: a vent, which is installed on the boiler, and the vent is used to regulate the airflow inside and outside the boiler.

2. The integrated automatic control system for a boiler according to claim 1, characterized in that, The integrated automatic control system for the boiler also includes an alarm unit, which is installed on the boiler and connected to the control unit. The alarm unit is used to issue an alarm message when abnormal parameters occur in the boiler.

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