A desulfurization oxidation suspended fan energy-saving control system

Abstract

The application discloses a kind of desulfurization oxidation suspended fan energy-saving control system, it includes: absorption tower;Suspension fan, connect in the side of absorption tower, for the oxidation wind that enters into absorption tower is adjusted;Oxidation wind main pipe, be arranged between absorption tower and the suspension fan, for oxidation wind is sent from suspension fan into absorption tower;Flue gas main pipe, connect in the other side of absorption tower, for the flue gas in boiler enters into absorption tower;Energy-saving control unit, be arranged in suspension fan, for automatically control suspension fan start and stop and operating condition.The application can accurately adjust the flow of oxidation wind by setting energy-saving control unit to automatically control the working parameter of suspension fan, oxidation wind amount can not appear too large or insufficient, reaches the purpose of energy saving and emission reduction, is favorable to improve the energy efficiency of suspension fan, also reduces the workload of operating staff, and the system has strong safety and reliability.

Description

Technical Field

[0001] This invention relates to the field of energy-saving control technology for floating fans, and in particular to an energy-saving control system for a desulfurization oxidation floating fan. Background Technology

[0002] More and more power plant desulfurization systems are undergoing energy-saving and efficiency-enhancing retrofits of their oxidation blowers, with most of these retrofits replacing them with suspended blowers (air-suspended blowers or magnetic levitation blowers). Suspended blowers are mechanical devices for conveying gas, employing core technologies such as magnetic levitation bearings, three-dimensional flow impellers, high-speed permanent magnet synchronous motors, high-efficiency frequency converter speed regulation, and intelligent monitoring and control. During startup, they levitate before rotating, eliminating friction and requiring no lubrication. The three-dimensional flow impeller is directly connected to the rotor, resulting in zero transmission loss. Suspended blowers are high-tech, green, energy-saving, and environmentally friendly products. The use of contactless, frictionless magnetic levitation bearings and high-speed, high-power permanent magnet synchronous motors directly drives the high-efficiency fluid impeller, overcoming the shortcomings of traditional blowers and air-suspended blowers. They offer advantages such as high efficiency, low noise, fewer malfunctions, and no need for a lubrication system. Even if the magnetic levitation bearing fails, the system's protective bearings can still safely stop the high-speed rotating rotor, preventing serious equipment damage.

[0003] The operation and shutdown of existing suspended fans, as well as the adjustment of the air intake flow, are mostly controlled and adjusted by the operators through external commands and based on their experience. This increases the workload of the operators and can easily lead to excessive or insufficient oxidation air volume, which is not conducive to the safe and reliable operation of the system, nor to improving energy efficiency during operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing suspended fans have problems of low energy efficiency, low safety and reliability during operation.

[0005] To address the aforementioned technical problems, this invention provides an energy-saving control system for a desulfurization and oxidation suspension fan, comprising:

[0006] Absorption tower;

[0007] A suspension fan is connected to one side of the absorption tower to regulate the oxidation air entering the absorption tower.

[0008] An oxidation air main pipe is installed between the absorption tower and the suspension fan to transport oxidation air from the suspension fan into the absorption tower.

[0009] The flue gas main pipe is connected to the other side of the absorption tower, and is used for the flue gas in the boiler to enter the absorption tower;

[0010] An energy-saving control unit is installed inside the suspended fan to automatically control the start-up, stop, and operation status of the suspended fan.

[0011] In an embodiment of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided, the suspension fan comprising:

[0012] A high-speed impeller is installed inside the suspended fan to control the outlet airflow velocity of the suspended fan;

[0013] A heat exchanger is installed at the air outlet of the suspended fan to control the air outlet temperature of the suspended fan.

[0014] The oxidation air main pipe is equipped with:

[0015] An oxidation air flow rate monitoring device is used to monitor the flow rate of the oxidation air in the oxidation air main pipe;

[0016] An oxidation air temperature monitoring device is used to monitor the temperature of the oxidation air inside the oxidation air main pipe;

[0017] The main flue gas pipe is equipped with:

[0018] A flue gas velocity monitoring device is used to monitor the velocity of the flue gas in the main flue gas pipe;

[0019] A flue gas temperature monitoring device is used to monitor the temperature of the flue gas in the main flue gas pipe;

[0020] The control unit includes a data acquisition module, a processing module, and a control module.

[0021] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0022] The acquisition module is used to acquire the flue gas velocity ΔG in the main pipe in real time, and the control module is used to control the suspended fan.

[0023] The processing module is used to set the flue gas velocity G0 in the standard main pipe. The processing module is also used to set the first preset flue gas velocity difference g1, the second preset flue gas velocity difference g2, the third preset flue gas velocity difference g3, and the fourth preset flue gas velocity difference g4 in the main pipe, where g1 < g2 < g3 < g4. The processing module is also used to set the first preset working condition a1, the second preset working condition a2, the third preset working condition a3, and the fourth preset working condition a4, where a1 to a4 are the first to fourth preset rotational speeds, respectively, and a1 < a2 < a3 < a4.

[0024] The preset working condition ai is selected as the working condition of the suspended fan based on the difference between the flue gas velocity ΔG flowing into the main pipe and the set standard flue gas velocity G0 in the main pipe.

[0025] When △G-G0≤g1, the first preset working condition a1 is selected as the working condition of the suspended fan;

[0026] When g1 < △G-G0 ≤ g2, the second preset working condition a2 is selected as the working condition of the suspending fan;

[0027] When g2 < △G - G0 ≤ g3, the third preset working condition a3 is selected as the working condition of the suspending fan;

[0028] When g3 < △G - G0 ≤ g4, the fourth preset working condition a4 is selected as the working condition of the suspending fan;

[0029] When the i-th preset working condition ai is selected as the working condition of the suspending fan, the control module controls the high-speed impeller to work at the i-th preset speed ai, i = 1, 2, 3, 4.

[0030] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0031] The processing module is further configured to set the flow rates T1, T2, T3, and T4 of the oxidation air in the first preset oxidation air header, the second preset oxidation air header, the third preset oxidation air header, and the fourth preset oxidation air header, where T1 < T2 < T3 < T4; the processing module is further configured to set the first preset correction coefficient m1, the second preset correction coefficient m2, the third preset correction coefficient m3, and the fourth preset correction coefficient m4, where 0.8 < m1 < m2 < m3 < m4 < 1;

[0032] The acquisition module is also used to acquire the flow velocity ΔT of the oxidation air in the oxidation air main pipe in real time. The processing module is also used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition ai when the i-th preset working condition ai is selected as the working condition of the suspension fan, based on the relationship between the real-time flow velocity ΔT of the oxidation air in the oxidation air main pipe and the flow velocity T of the oxidation air in each preset oxidation air main pipe.

[0033] When △T≤T1, the working conditions in the i-th preset working condition ai are not modified;

[0034] When T1 < △T ≤ T2, the first preset correction coefficient m1 is selected to correct ai, and the corrected value is ai * m1;

[0035] When T2 < △T ≤ T3, the second preset correction coefficient m2 is selected to correct ai, and the corrected value is ai * m2;

[0036] When T3 < △T ≤ T4, the third preset correction coefficient m3 is selected to correct ai, and the corrected value is ai * m3;

[0037] When T4 < △T, the fourth preset correction coefficient m4 is selected to correct ai, and the corrected value is ai * m4.

[0038] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0039] The acquisition module is also used to acquire the temperature ΔS of the flue gas in the flue gas main in real time, and the control module is used to control the suspension fan.

[0040] The acquisition module is used to set a preset temperature value S0 for the flue gas in the standard flue gas main pipe. The acquisition module is also used to set a first preset temperature difference s1, a second preset temperature difference s2, a third preset temperature difference s3, and a fourth preset temperature difference s4 for the flue gas in the flue gas main pipe, where s1 < s2 < s3 < s4. The processing module is also used to set a first preset working condition d1, a second preset working condition d2, a third preset working condition d3, and a fourth preset working condition d4, where d1 to d4 are the first to fourth preset temperatures, respectively, and d1 < d2 < d3 < d4.

[0041] The preset working condition di is selected as the working condition of the suspended fan based on the difference between the temperature ΔS of the flue gas in the flue gas main pipe and the preset temperature S0 of the flue gas in the standard flue gas main pipe.

[0042] When △S-S0≤g1, the first preset working condition d1 is selected as the working condition of the suspended fan;

[0043] When s1 < △S - S0 ≤ s2, the second preset working condition d2 is selected as the working condition of the suspended fan;

[0044] When s2<△S-S0≤s3, the third preset working condition d3 is selected as the working condition of the suspending fan;

[0045] When s3 < △S - S0 ≤ s4, the fourth preset working condition d4 is selected as the working condition of the suspended fan;

[0046] When the i-th preset working condition di is selected as the working condition of the suspending fan, the control module controls the heat exchanger to operate at the i-th preset temperature di, i = 1, 2, 3, 4.

[0047] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0048] The processing module is further configured to set the temperatures of the oxidation air in the first preset oxidation air header L1, the second preset oxidation air header L2, the third preset oxidation air header L3, and the fourth preset oxidation air header L4, where L1 < L2 < L3 < L4; the processing module is further configured to set the first preset correction coefficient n1, the second preset correction coefficient n2, the third preset correction coefficient m3, and the fourth preset correction coefficient n4, where 0.8 < n1 < n2 < n3 < n4 < 1;

[0049] The acquisition module is also used to acquire the flow temperature ΔL of the oxidation air in the oxidation air header in real time. The processing module is also used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition di when the i-th preset working condition di is selected as the working condition of the suspension fan, based on the relationship between the real-time temperature ΔL of the oxidation air in the oxidation air header and the temperature L of the oxidation air in each preset oxidation air header.

[0050] When △L≤L1, the working conditions in the i-th preset working condition di are not modified;

[0051] When L1 < ΔL ≤ L2, the first preset correction coefficient n1 is selected to correct di, and the corrected value is di * n1.

[0052] When L2 < ΔL ≤ L3, the second preset correction coefficient n2 is selected to correct di, and the corrected value is di * n2.

[0053] When L3 < △L ≤ L4, the third preset correction coefficient n3 is selected to correct di, and the corrected value is di * n3.

[0054] When L4 < ΔL, the fourth preset correction coefficient n4 is selected to correct di, and the corrected value is di * n4.

[0055] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0056] The oxidation air main pipe is equipped with a check valve and a maintenance valve. The check valve is used to prevent the oxidation air from flowing back into the oxidation air main pipe, and the maintenance valve is used for the maintenance and repair of the oxidation air main pipe.

[0057] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0058] The acquisition module is electrically connected to the oxidation air velocity monitoring device, oxidation air temperature monitoring device, flue gas velocity monitoring device, and flue gas temperature monitoring device.

[0059] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0060] The energy-saving control unit is controlled by a PLC control system. When two or more of the suspended fans are used in parallel, they can be controlled simultaneously by the energy-saving control unit.

[0061] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0062] The energy-saving control unit controls the suspended fan section to operate at the lowest operating load ratio.

[0063] Compared with the prior art, the energy-saving control system for a desulfurization oxidation suspension fan according to an embodiment of the present invention has the following advantages:

[0064] This invention automatically controls the operating parameters of the suspended fan by setting an energy-saving control unit, which can precisely adjust the flow rate of the oxidation air, preventing the oxidation air volume from being too large or too small, thus achieving the purpose of energy saving and emission reduction. It is beneficial to improve the energy efficiency of the suspended fan, while also reducing the workload of the operation staff. Moreover, the system has strong safety and reliability. Attached Figure Description

[0065] Figure 1 This is a schematic diagram of the structure of the desulfurization oxidation suspension fan energy-saving control system in an embodiment of the present invention;

[0066] Figure 2 This is a schematic diagram of the structure of the suspended fan in the desulfurization oxidation suspended fan energy-saving control system of the present invention;

[0067] Figure 3 This is a schematic diagram of the internal structure of the suspended fan in the desulfurization oxidation suspended fan energy-saving control system of the present invention;

[0068] Figure 4 This is a schematic diagram of the high-speed impeller of the desulfurization oxidation suspension fan energy-saving control system in an embodiment of the present invention;

[0069] Figure 5 This is a schematic diagram of the control unit structure of the desulfurization oxidation suspension fan energy-saving control system in an embodiment of the present invention.

[0070] In the diagram, 1. Absorption tower; 2. Suspended fan; 3. Oxidation air main pipe; 4. Flue gas main pipe; 5. Energy-saving control unit; 6. High-speed impeller; 7. Heat exchanger; 8. Oxidation air velocity monitoring device; 9. Oxidation air temperature monitoring device; 10. Flue gas velocity monitoring device; 11. Flue gas temperature monitoring device; 12. Check valve; 13. Maintenance valve. Detailed Implementation

[0071] The specific embodiments of the present invention 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] like Figure 1 As shown in the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided, comprising:

[0076] Absorption tower 1;

[0077] Suspension fan 2 is connected to one side of the absorption tower 1 and is used to regulate the oxidation air entering the absorption tower 1;

[0078] The oxidation air main pipe 3 is disposed between the absorption tower 1 and the suspension fan 2, and is used to transport oxidation air from the suspension fan 2 into the absorption tower 1;

[0079] The flue gas main pipe 4 is connected to the other side of the absorption tower 1, and is used for the flue gas in the boiler to enter the absorption tower 1;

[0080] An energy-saving control unit 5 is installed inside the suspended fan 2 and is used to automatically control the start-up, stop and operation status of the suspended fan 2.

[0081] Specifically, the suspended fan 2 is equipped with an energy-saving control unit 5, which displays real-time operating data on an LCD screen and has functions such as touch operation, alarm, and recording.

[0082] Furthermore, by setting the energy-saving control unit 5 to automatically control the operating parameters of the suspended fan 2, the flow rate of the oxidation air can be precisely adjusted, preventing the oxidation air volume from being too large or too small, thus achieving the purpose of energy saving and emission reduction. This is beneficial to improving the energy efficiency of the suspended fan 2, while also reducing the workload of the operation staff. Moreover, the system has strong safety and reliability.

[0083] In an embodiment of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided, wherein the suspension fan 2 includes:

[0084] A high-speed impeller 6 is installed inside the suspended fan 2 to control the outlet airflow rate of the suspended fan 2;

[0085] like Figure 3 As shown, specifically, the high-speed impeller 6 is disposed inside the suspended fan 2;

[0086] Heat exchanger 7 is installed at the air outlet of the suspended fan 2 and is used to control the air outlet temperature of the suspended fan 2.

[0087] like Figure 2 As shown, specifically, the heat exchanger 7 is located at the air outlet of the suspended fan 2;

[0088] The oxidation air main pipe 3 is equipped with:

[0089] Oxidation air flow rate monitoring device 8 is used to monitor the flow rate of oxidation air in the oxidation air main pipe 3;

[0090] Oxidation air temperature monitoring device 9 is used to monitor the temperature of the oxidation air in the oxidation air main pipe 3;

[0091] Specifically, the front and rear positions of the oxidation air flow rate monitoring device 8 and the oxidation air temperature monitoring device 9 on the oxidation air main pipe 3 are not fixed and can be set according to actual needs;

[0092] The main flue gas pipe 4 is equipped with:

[0093] The flue gas velocity monitoring device 10 is used to monitor the flow velocity of the flue gas in the flue gas main duct 4;

[0094] Flue gas temperature monitoring device 11 is used to monitor the temperature of flue gas in the flue gas main duct 4;

[0095] Specifically, the front and rear positions of the flue gas velocity monitoring device 10 and the flue gas temperature monitoring device 11 on the main flue gas pipe 4 are not fixed and can be set according to actual needs;

[0096] The control unit includes a data acquisition module, a processing module, and a control module.

[0097] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0098] The acquisition module is used to acquire the flue gas velocity ΔG in the main pipe in real time, and the control module is used to control the suspended fan 2;

[0099] The processing module is used to set the flue gas velocity G0 in the standard main pipe. The processing module is also used to set the first preset flue gas velocity difference g1, the second preset flue gas velocity difference g2, the third preset flue gas velocity difference g3, and the fourth preset flue gas velocity difference g4 in the main pipe, where g1 < g2 < g3 < g4. The processing module is also used to set the first preset working condition a1, the second preset working condition a2, the third preset working condition a3, and the fourth preset working condition a4, where a1 to a4 are the first to fourth preset rotational speeds, respectively, and a1 < a2 < a3 < a4.

[0100] The preset working condition ai is selected as the working condition of the suspended fan 2 based on the difference between the flue gas velocity ΔG flowing into the main pipe and the set standard flue gas velocity G0 in the main pipe.

[0101] When △G-G0≤g1, the first preset working condition a1 is selected as the working condition of the suspended fan 2;

[0102] When g1 < △G-G0 ≤ g2, the second preset working condition a2 is selected as the working condition of the suspended fan 2;

[0103] When g2 < △G - G0 ≤ g3, the third preset working condition a3 is selected as the working condition of the suspending fan 2;

[0104] When g3 < △G - G0 ≤ g4, the fourth preset working condition a4 is selected as the working condition of the suspending fan 2;

[0105] When the i-th preset working condition ai is selected as the working condition of the suspending fan 2, the control module controls the high-speed impeller 6 to work at the i-th preset speed ai, i = 1, 2, 3, 4.

[0106] Specifically, the operating conditions of the suspended fan 2 are selected based on the difference between the flue gas velocity flowing into the main pipe and the flue gas velocity in the set standard main pipe. The speed of the high-speed impeller 6 can be precisely adjusted based on the information to blow out a precise oxidation air velocity and flow rate, reduce unnecessary energy consumption, and avoid the occurrence of excessive or insufficient oxidation air volume.

[0107] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0108] The processing module is also used to set the flow rate T1 of the oxidation air in the first preset oxidation air header 3, the flow rate T2 of the second preset oxidation air header 3, the flow rate T3 of the third preset oxidation air header 3, and the flow rate T4 of the fourth preset oxidation air header 3, where T1 < T2 < T3 < T4; the processing module is also used to set the first preset correction coefficient m1, the second preset correction coefficient m2, the third preset correction coefficient m3, and the fourth preset correction coefficient m4, where 0.8 < m1 < m2 < m3 < m4 < 1;

[0109] The acquisition module is also used to acquire the flow velocity ΔT of the oxidation air in the oxidation air main pipe 3 in real time. The processing module is also used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition ai when the i-th preset working condition ai is selected as the working condition of the suspension fan 2, based on the relationship between the real-time flow velocity ΔT of the oxidation air in the oxidation air main pipe 3 and the flow velocity T of the oxidation air in each preset oxidation air main pipe 3.

[0110] When △T≤T1, the working conditions in the i-th preset working condition ai are not modified;

[0111] When T1 < △T ≤ T2, the first preset correction coefficient m1 is selected to correct ai, and the corrected value is ai * m1;

[0112] When T2 < △T ≤ T3, the second preset correction coefficient m2 is selected to correct ai, and the corrected value is ai * m2;

[0113] When T3 < △T ≤ T4, the third preset correction coefficient m3 is selected to correct ai, and the corrected value is ai * m3;

[0114] When T4 < △T, the fourth preset correction coefficient m4 is selected to correct ai, and the corrected value is ai * m4.

[0115] Specifically, the specific value of the oxidation air velocity in the oxidation air header 3 is determined according to the rotational speed of the high-speed impeller 6. When the high-speed impeller 6 cannot reach the oxidation air velocity in the oxidation air header 3 at a certain rotational speed, the working conditions of the suspension fan 2 need to be adjusted according to the relationship between the real-time oxidation air velocity in the oxidation air header 3 and the oxidation air velocity in each preset oxidation air header 3, so as to ensure that the high-speed impeller 6 can reach the oxidation air velocity in the oxidation air header 3 at a certain rotational speed.

[0116] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0117] The acquisition module is also used to acquire the temperature ΔS of the flue gas in the flue gas main 4 in real time, and the control module is used to control the suspended fan 2.

[0118] The acquisition module is used to set the preset temperature value S0 of the flue gas in the standard flue gas main pipe 4. The acquisition module is also used to set the first preset temperature difference s1, the second preset temperature difference s2, the third preset temperature difference s3, and the fourth preset temperature difference s4 of the flue gas in the flue gas main pipe 4, and s1 < s2 < s3 < s4. The processing module is also used to set the first preset working condition d1, the second preset working condition d2, the third preset working condition d3, and the fourth preset working condition d4, wherein d1 to d4 are the first to fourth preset temperatures, and d1 < d2 < d3 < d4.

[0119] The preset working condition di is selected as the working condition of the suspended fan 2 based on the difference between the temperature ΔS of the flue gas in the flue gas main 4 and the preset temperature S0 of the flue gas in the standard flue gas main 4.

[0120] When △S-S0≤g1, the first preset working condition d1 is selected as the working condition of the suspended fan 2;

[0121] When s1 < △S - S0 ≤ s2, the second preset working condition d2 is selected as the working condition of the suspended fan 2;

[0122] When s2<△S-S0≤s3, the third preset working condition d3 is selected as the working condition of the suspended fan 2;

[0123] When s3 < △S - S0 ≤ s4, the fourth preset working condition d4 is selected as the working condition of the suspended fan 2;

[0124] When the i-th preset working condition di is selected as the working condition of the suspending fan 2, the control module controls the heat exchanger 7 to operate at the i-th preset temperature di, i = 1, 2, 3, 4.

[0125] Specifically, the operating conditions of the suspended fan 2 are selected based on the difference between the temperature of the flue gas in the flue gas main 4 and the preset temperature of the flue gas in the standard flue gas main 4. The temperature of the heat exchanger 7 can be precisely adjusted based on the information to blow out an accurate oxidation air temperature, reduce unnecessary energy consumption, and avoid the oxidation air temperature being too high or too low.

[0126] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0127] The processing module is also used to set the temperature L1 of the oxidation air in the first preset oxidation air header 3, the temperature L2 of the second preset oxidation air header 3, the temperature L3 of the third preset oxidation air header 3, and the temperature L4 of the fourth preset oxidation air header 3, where L1 < L2 < L3 < L4; the processing module is also used to set the first preset correction coefficient n1, the second preset correction coefficient n2, the third preset correction coefficient m3, and the fourth preset correction coefficient n4, where 0.8 < n1 < n2 < n3 < n4 < 1;

[0128] The acquisition module is also used to acquire the flow temperature ΔL of the oxidation air in the oxidation air header 3 in real time. The processing module is also used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition di when the i-th preset working condition di is selected as the working condition of the suspension fan 2, based on the relationship between the real-time temperature ΔL of the oxidation air in the oxidation air header 3 and the temperature L of the oxidation air in each preset oxidation air header 3.

[0129] When △L≤L1, the working conditions in the i-th preset working condition di are not modified;

[0130] When L1 < ΔL ≤ L2, the first preset correction coefficient n1 is selected to correct di, and the corrected value is di * n1.

[0131] When L2 < ΔL ≤ L3, the second preset correction coefficient n2 is selected to correct di, and the corrected value is di * n2.

[0132] When L3 < △L ≤ L4, the third preset correction coefficient n3 is selected to correct di, and the corrected value is di * n3.

[0133] When L4 < ΔL, the fourth preset correction coefficient n4 is selected to correct di, and the corrected value is di * n4.

[0134] Specifically, the temperature of the oxidation air in the oxidation air header 3 is determined based on the temperature of the heat exchanger 7. When the heat exchanger 7 fails to reach the temperature of the oxidation air in the oxidation air header 3 at a certain heat exchange temperature, the operating conditions of the suspended fan 2 need to be adjusted according to the relationship between the real-time temperature of the oxidation air in the oxidation air header 3 and the temperatures of the oxidation air in each preset oxidation air header 3, so as to ensure that the heat exchanger 7 can reach the temperature of the oxidation air in the oxidation air header 3 at a certain temperature.

[0135] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0136] The oxidation air main pipe 3 is equipped with a check valve 12 and a maintenance valve 13. The check valve 12 is used to prevent the oxidation air in the oxidation air main pipe 3 from flowing back, and the maintenance valve 13 is used for the maintenance and repair of the oxidation air main pipe 3.

[0137] Specifically, the check valve 12 is located near the outlet of the suspending fan 2 on the oxidation air main pipe 3, and the check valve 12 is located even closer to the outlet of the suspending fan 2. The maintenance valve 13 is located behind the check valve 12.

[0138] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0139] The acquisition module is electrically connected to the oxidation air velocity monitoring device 8, the oxidation air temperature monitoring device 9, the flue gas velocity monitoring device 10, and the flue gas temperature monitoring device 11.

[0140] Specifically, the acquisition module can collect data from the oxidation air velocity monitoring device 8, oxidation air temperature monitoring device 9, flue gas velocity monitoring device 10, and flue gas temperature monitoring device 11 to ensure data accuracy.

[0141] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0142] The energy-saving control unit 5 is controlled by a PLC control system. When two or more of the suspended fans 2 are used in parallel, they can be controlled simultaneously by the energy-saving control unit 5.

[0143] Specifically, the operation of the suspended fan 2 is controlled by a PLC control system. The air volume and pressure of the suspended fan 2 are automatically matched, and it has alarm and protection functions such as frequency converter, overload, overcurrent, surge, back blockage, and differential pressure. When two or more suspended fans 2 are used in parallel, they can be controlled simultaneously by the energy-saving control unit 5.

[0144] In the embodiments of this application, an energy-saving control system for a desulfurization oxidation suspension fan is provided.

[0145] The energy-saving control unit 5 controls the two sections of the suspended fan to operate at the lowest operating load ratio.

[0146] In summary, this invention provides an energy-saving control method and system for a desulfurization oxidation suspended blower 2, comprising: an absorption tower 1; a suspended blower 2 connected to one side of the absorption tower 1 for regulating the oxidation air entering the absorption tower 1; an oxidation air main pipe 3 disposed between the absorption tower 1 and the suspended blower 2 for conveying oxidation air from the suspended blower 2 into the absorption tower 1; a flue gas main pipe 4 connected to the other side of the absorption tower 1 for allowing flue gas from the boiler to enter the absorption tower 1; and an energy-saving control unit 5 disposed within the suspended blower 2 for automatically controlling the start-up, stop, and operation status of the suspended blower 2. This invention, by setting the energy-saving control unit 5 to automatically control the operating parameters of the suspended blower 2, can precisely adjust the flow rate of the oxidation air, preventing excessive or insufficient oxidation air volume, thus achieving energy saving and emission reduction. It also improves the energy efficiency of the suspended blower 2, reduces the workload of operating personnel, and the system has strong safety and reliability.

[0147] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving control system for a desulfurization and oxidation suspension fan, characterized in that, include: Absorption tower; A suspension fan is connected to one side of the absorption tower to regulate the oxidation air entering the absorption tower. An oxidation air main pipe is installed between the absorption tower and the suspension fan to transport oxidation air from the suspension fan into the absorption tower. The flue gas main pipe is connected to the other side of the absorption tower, and is used for the flue gas in the boiler to enter the absorption tower; An energy-saving control unit is installed inside the suspended fan to automatically control the start-up, stop, and operation status of the suspended fan; The suspended fan includes: A high-speed impeller is installed inside the suspended fan to control the outlet airflow velocity of the suspended fan; A heat exchanger is installed at the air outlet of the suspended fan to control the air outlet temperature of the suspended fan. The oxidation air main pipe is equipped with: An oxidation air flow rate monitoring device is used to monitor the flow rate of the oxidation air in the oxidation air main pipe; An oxidation air temperature monitoring device is used to monitor the temperature of the oxidation air inside the oxidation air main pipe; The main flue gas pipe is equipped with: A flue gas velocity monitoring device is used to monitor the velocity of the flue gas in the main flue gas pipe; A flue gas temperature monitoring device is used to monitor the temperature of the flue gas in the main flue gas pipe; The control unit includes a data acquisition module, a processing module, and a control module; The acquisition module is used to acquire the flue gas velocity ΔG in the main pipe in real time, and the control module is used to control the suspended fan. The processing module is used to set the flue gas velocity G0 in the standard main pipe. The processing module is also used to set the first preset flue gas velocity difference g1, the second preset flue gas velocity difference g2, the third preset flue gas velocity difference g3, and the fourth preset flue gas velocity difference g4 in the main pipe, where g1 < g2 < g3 < g4. The processing module is also used to set the first preset working condition a1, the second preset working condition a2, the third preset working condition a3, and the fourth preset working condition a4, where a1 to a4 are the first to fourth preset rotational speeds, and a1 < a2 < a3 < a4. The preset working condition ai is selected as the working condition of the suspended fan based on the difference between the flue gas velocity ΔG flowing into the main pipe and the set standard flue gas velocity G0 in the main pipe. When △G-G0≤g1, the first preset working condition a1 is selected as the working condition of the suspended fan; When g1 < △G - G0 ≤ g2, the second preset working condition a2 is selected as the working condition of the suspended fan; When g2<△G-G0≤g3, the third preset working condition a3 is selected as the working condition of the suspending fan; When g3<△G-G0≤g4, the fourth preset working condition a4 is selected as the working condition of the suspending fan; When the i-th preset working condition ai is selected as the working condition of the suspending fan, the control module controls the high-speed impeller to work at the i-th preset speed ai, i=1,2,3,4; The processing module is further configured to set the flow rates T1, T2, T3, and T4 of the oxidation air in the first preset oxidation air header, the second preset oxidation air header, the third preset oxidation air header, and the fourth preset oxidation air header, where T1 < T2 < T3 < T4; the processing module is further configured to set the first preset correction coefficient m1, the second preset correction coefficient m2, the third preset correction coefficient m3, and the fourth preset correction coefficient m4, where 0.8 < m1 < m2 < m3 < m4 < 1; The acquisition module is also used to acquire the flow velocity ΔT of the oxidation air in the oxidation air main pipe in real time. The processing module is also used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition ai when the i-th preset working condition ai is selected as the working condition of the suspension fan, based on the relationship between the real-time flow velocity ΔT of the oxidation air in the oxidation air main pipe and the flow velocity T of the oxidation air in each preset oxidation air main pipe. When △T≤T1, the working conditions in the i-th preset working condition ai are not modified; When T1 < △T ≤ T2, the first preset correction coefficient m1 is selected to correct ai, and the corrected value is ai*m1; When T2 < △T ≤ T3, the second preset correction coefficient m2 is selected to correct ai, and the corrected value is ai*m2; When T3 < △T ≤ T4, the third preset correction coefficient m3 is selected to correct ai, and the corrected value is ai*m3; When T4 < △T, the fourth preset correction coefficient m4 is selected to correct ai, and the corrected value is ai*m4.

2. The energy-saving control system for a desulfurization oxidation suspension fan according to claim 1, characterized in that, The acquisition module is also used to acquire the temperature ΔS of the flue gas in the flue gas main in real time, and the control module is used to control the suspension fan. The acquisition module is used to set a preset temperature value S0 for the flue gas in the standard flue gas main pipe. The acquisition module is also used to set a first preset temperature difference s1, a second preset temperature difference s2, a third preset temperature difference s3, and a fourth preset temperature difference s4 for the flue gas in the flue gas main pipe, where s1 < s2 < s3 < s4. The processing module is also used to set a first preset working condition d1, a second preset working condition d2, a third preset working condition d3, and a fourth preset working condition d4, where d1 to d4 are the first to fourth preset temperatures, respectively, and d1 < d2 < d3 < d4. The preset working condition di is selected as the working condition of the suspended fan based on the difference between the temperature ΔS of the flue gas in the flue gas main pipe and the preset temperature S0 of the flue gas in the standard flue gas main pipe. When △S-S0≤g1, the first preset working condition d1 is selected as the working condition of the suspended fan; When s1<△S-S0≤s2, the second preset working condition d2 is selected as the working condition of the suspended fan; When s2<△S-S0≤s3, the third preset working condition d3 is selected as the working condition of the suspending fan; When s3<△S-S0≤s4, the fourth preset working condition d4 is selected as the working condition of the suspended fan; When the i-th preset working condition di is selected as the working condition of the suspending fan, the control module controls the heat exchanger to operate at the i-th preset temperature di, i=1,2,3,4.

3. The energy-saving control system for a desulfurization oxidation suspension fan according to claim 2, characterized in that, The processing module is further configured to set the temperatures of the oxidation air in the first preset oxidation air header L1, the second preset oxidation air header L2, the third preset oxidation air header L3, and the fourth preset oxidation air header L4, where L1 < L2 < L3 < L4; the processing module is further configured to set the first preset correction coefficient n1, the second preset correction coefficient n2, the third preset correction coefficient m3, and the fourth preset correction coefficient n4, where 0.8 < n1 < n2 < n3 < n4 < 1; The acquisition module is also used to acquire the flow temperature ΔL of the oxidation air in the oxidation air header in real time. The processing module is also used to select a preset correction coefficient to correct the working conditions in the i-th preset working condition di when the i-th preset working condition di is selected as the working condition of the suspension fan, based on the relationship between the real-time temperature ΔL of the oxidation air in the oxidation air header and the temperature L of the oxidation air in each preset oxidation air header. When △L≤L1, the working conditions in the i-th preset working condition di are not modified; When L1 < ΔL ≤ L2, the first preset correction coefficient n1 is selected to correct di, and the corrected value is di*n1; When L2 < ΔL ≤ L3, the second preset correction coefficient n2 is selected to correct di, and the corrected value is di * n2. When L3 < △L ≤ L4, the third preset correction coefficient n3 is selected to correct di, and the corrected result is di * n3; When L4 < ΔL, the fourth preset correction coefficient n4 is selected to correct di, and the corrected result is di * n4.

4. The energy-saving control system for a desulfurization oxidation suspension fan according to claim 1, characterized in that, The oxidation air main pipe is equipped with a check valve and a maintenance valve. The check valve is used to prevent the oxidation air from flowing back into the oxidation air main pipe, and the maintenance valve is used for the maintenance and repair of the oxidation air main pipe.

5. The energy-saving control system for a desulfurization oxidation suspension fan according to claim 1, characterized in that, The acquisition module is electrically connected to the oxidation air velocity monitoring device, oxidation air temperature monitoring device, flue gas velocity monitoring device, and flue gas temperature monitoring device.

6. The energy-saving control system for a desulfurization oxidation suspension fan according to claim 1, characterized in that, The energy-saving control unit is controlled by a PLC control system. When two or more of the suspended fans are used in parallel, they can be controlled simultaneously by the energy-saving control unit.

7. The energy-saving control system for a desulfurization oxidation suspension fan according to claim 6, characterized in that, The energy-saving control unit controls the suspended fan section to operate at the lowest operating load ratio.

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