A coal economizer with wide load adaptability

Abstract

The present invention provides an economizer with wide load adaptability, which relates to the field of thermal power generation technology, including: a primary economizer, an SCR denitrification device, a secondary economizer, and a fourth flue is connected between the secondary economizers, and electromagnetic valves 1 and 2 are respectively provided at both ends of the fourth flue, and economizer outlet ash hopper boxes are provided at the bottom ends of the primary economizer and the secondary economizer, and a coal ash treatment device is provided in the economizer outlet ash hopper box. The present invention arranges two groups of economizers at both ends of the SCR denitrification device, and a controller can adjust the flow rate of electromagnetic valves 1 and 2, so as to adjust the flue gas volume entering the secondary economizer. This effectively improves the technical problem raised in the background technology: when the load of the unit changes greatly, it is often difficult for traditional economizers to ensure the stable operation of the SCR denitrification device at low loads, resulting in excessive NOx emissions.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation, in particular to a coal economizer with wide load adaptability. Background Art

[0002] Economizer (English name Economizer) is a device installed at the lower part of the flue at the tail end of the boiler to recover the waste heat of the exhaust gas. It heats the boiler feed water into a heating surface of saturated water under the drum pressure. Because it absorbs the heat of high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called an economizer.

[0003] At present, coal-fired units occupy an important position in power production, and the boiler, as the core equipment of the coal-fired unit, has a direct impact on the energy consumption and emissions of the entire unit. As an important part of the boiler, the economizer recovers the waste heat of flue gas to heat the feed water and improve the thermal efficiency of the boiler. However, when the load of the unit changes greatly, the traditional economizer often cannot ensure the stable operation of the SCR denitrification device at low load, resulting in excessive NOx emissions. Therefore, in view of the above situation, it is urgent to develop an economizer with wide load adaptability to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The present invention provides an economizer with wide load adaptability to solve the technical problem raised by the above background technology: when the load of the unit changes greatly, it is often difficult for the traditional economizer to ensure the stable operation of the SCR denitrification device at low load, resulting in excessive NOx emissions.

[0005] In order to solve the above technical problems, the present invention discloses an economizer with wide load adaptability, including: a first-level economizer, the left side of the first-level economizer is connected to the tail flue of a coal-fired boiler, and the left bottom end of the first-level economizer is connected to the main water supply pipe, and the first-level economizer is connected to the input end of an SCR denitrification device through a first flue, the output end of the SCR denitrification device is connected to a second-level economizer through a second flue, and the left bottom end of the second-level economizer is connected to a water supply bypass pipe, the bottom end of the second-level economizer is connected to a third flue, and the bottom ends of the first-level economizer and the second-level economizer are both provided with economizer outlet ash hopper boxes, and a coal ash treatment device is provided in the economizer outlet ash hopper boxes.

[0006] Preferably, a fourth flue is connected between the first flue and the third flue, and electromagnetic valve 1 and electromagnetic valve 2 are respectively provided at two ends of the fourth flue.

[0007] Preferably, the sizes of the heating surfaces of the primary economizer and the secondary economizer are optimized according to the design load of the unit and the flue gas characteristics to ensure that the flue gas waste heat can be effectively recovered and the feed water can be heated under different loads.

[0008] Preferably, the primary economizer and the secondary economizer bodies are made of corrosion-resistant and wear-resistant materials.

[0009] Preferably, the economizer with wide load adaptability further includes: a temperature sensor and a controller for real-time monitoring of the flue gas temperature and water temperature at the outlets of the first-stage economizer and the second-stage economizer, and automatically adjusting the flow rates of the solenoid valve one and the solenoid valve two according to preset parameters to achieve intelligent control of the economizer.

[0010] Preferably, the economizer with wide load adaptability further includes an alarm device connected to the controller. When the flue gas temperature at the inlet of the SCR denitrification device exceeds a preset range, the alarm device sends an alarm signal to remind the operator to take timely measures.

[0011] Preferably, the coal ash processing device includes: a liquid storage chamber, which is arranged on the inner wall of the right end of the economizer outlet ash hopper box, a fixed block fixedly installed on the inner wall of the right side of the driving chamber, and a bidirectional drive motor is fixedly installed on the left end of the fixed block, and a turntable 1 and a turntable 2 are fixedly installed on the front and rear end output shafts of the bidirectional drive motor respectively, the turntable 1 is connected to the coal ash dust reduction mechanism, and the turntable 2 is connected to the coal cinder crushing mechanism.

[0012] Preferably, the coal ash crushing mechanism includes: a support rod 1, one end of which is movably connected to a turntable 2, and the other end of which passes through a driving chamber and is movably connected to a connecting block 1, the left end of the connecting block 1 is fixedly mounted on a crushing rod 1, and the crushing rod 1 is slidably connected to a filter plate left and right, and the filter plate is fixedly mounted on an inner wall of a processing chamber provided at the left end of an economizer outlet ash hopper box, and a crushing rod 2 is fixedly mounted on an inner wall of the processing chamber at the left top end of the filter plate, and the crushing rod 1 and the crushing rod 2 are located on the same horizontal plane, and the processing chamber is connected to a primary economizer or a secondary economizer through a through hole 1, and the bottom end of the processing chamber is connected to an ash outlet.

[0013] Preferably, the coal ash dust reduction mechanism includes: a second support rod, one end of which is movably connected to a turntable one, the other end of which passes through the pressurizing chamber and is movably connected to a second connecting block, and the bottom end of the second connecting block is fixedly mounted on a piston, the piston is slidably connected to the inner wall of the pressurizing chamber up and down, the two ends of a connecting pipe one are respectively connected to the liquid storage chamber and the pressurizing chamber, and a reverse flow valve one is fixedly installed in the connecting pipe one, one end of a connecting pipe two is connected to the pressurizing chamber, and the other end of the connecting pipe two is connected to a spraying assembly, and a reverse flow valve two is fixedly installed in the connecting pipe two.

[0014] Preferably, the spray assembly includes: a regulating box, which is arranged on the inner wall of the economizer outlet ash hopper box at the right bottom end of the processing chamber, and the processing chamber is connected with the left end of the regulating box, the connecting pipe 2 is connected with the connecting hose, and the two ends of the connecting hose are respectively connected with one end of the short pipe, and the other end of the short pipe is connected to the nozzle, the driving motor is fixedly installed on the inner wall of the regulating box, and the output shaft of the driving motor is fixedly installed with a threaded rod, the other end of the threaded rod is rotatably connected to the mounting frame, and the right end of the mounting frame is fixedly installed on the inner wall of the regulating box, the threaded rod is threadedly connected with a threaded sleeve, the front and rear ends of the threaded sleeve are respectively movably connected with the support rod three, and the other end of the support rod three is movably connected to the sliding rod, the sliding rod is slidably connected to the inner wall of the slide groove, and the other end of the sliding rod is fixedly connected to the short tube through the short rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A front view of the structure provided by an embodiment of the present invention;

[0017] Figure 2 The embodiment of the present invention provides Figure 1 Schematic diagram of the internal structure of the ash hopper box at the outlet of the middle economizer;

[0018] Figure 3 The embodiment of the present invention provides Figure 1 Top view of the structure on the right side of the middle drive cavity;

[0019] Figure 4 The embodiment of the present invention provides Figure 2 Top view of the middle adjustment box structure.

[0020] Reference numerals:

[0021] 1. First-stage economizer; 2. Main water supply pipeline; 3. First flue; 4. SCR denitrification device; 5. Second flue; 6. Second-stage economizer; 7. Water supply bypass pipeline; 8. Third flue; 9. Economizer outlet ash hopper box; 10. Fourth flue; 11. Solenoid valve 1; 12. Solenoid valve 2; 13. Liquid storage chamber; 14. Fixed block; 15. Drive chamber; 16. Bidirectional drive motor; 17. Turntable 1; 18. Turntable 2; 19. Support rod 1; 20. Connecting block 1; 21. Crushing rod 1; 22. Filter plate; 23, processing chamber; 24, crushing rod two; 25, through hole one; 26, ash outlet; 27, support rod two; 28, connecting block two; 29, pressurizing chamber; 30, piston; 31, connecting pipe one; 32, backflow valve one; 33, connecting pipe two; 34, backflow valve two; 35, regulating box; 36, connecting hose; 37, short pipe; 38, nozzle; 39, short rod; 40, driving motor; 41, threaded rod; 42, mounting frame; 43, threaded sleeve; 44, support rod three; 45, sliding rod; 46, slide groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] The present invention provides the following embodiments

[0025] Example 1

[0026] The embodiment of the present invention provides a coal economizer with wide load adaptability, such as Figure 1As shown, an economizer with wide load adaptability includes: a first-level economizer 1, the left side of the first-level economizer 1 is connected to the tail flue of a coal-fired boiler, and the left bottom end of the first-level economizer 1 is connected to the main water supply pipe 2, and the first-level economizer 1 is connected to the input end of an SCR denitrification device 4 through a first flue 3, the output end of the SCR denitrification device 4 is connected to a second-level economizer 6 through a second flue 5, and the left bottom end of the second-level economizer 6 is connected to a water supply bypass pipe 7, the bottom end of the second-level economizer 6 is connected to a third flue 8, and economizer outlet ash hopper boxes 9 are provided at the bottom ends of the first-level economizer 1 and the second-level economizer 6, and a coal ash treatment device is provided in the economizer outlet ash hopper box 9.

[0027] Optionally, a fourth flue 10 is connected between the first flue 3 and the third flue 8 , and an electromagnetic valve 1 11 and an electromagnetic valve 2 12 are respectively provided at two ends of the fourth flue 10 .

[0028] Optionally, the sizes of the heating surfaces of the primary economizer 1 and the secondary economizer 6 are optimized according to the design load of the unit and the flue gas characteristics to ensure that the flue gas waste heat can be effectively recovered and the feed water can be heated under different loads.

[0029] The beneficial effects of the above technical solution are as follows: the present invention sets two sets of economizers at both ends of the SCR denitration device 4, and the heating surface sizes of the first economizer 1 and the second economizer 6 are optimized and designed according to the unit design load and flue gas characteristics, and the flow rate of the electromagnetic valve 11 and the electromagnetic valve 2 12 can be controlled to adjust the flue gas volume entering the second economizer 6. This effectively improves the technical problem proposed in the background technology that when the unit load changes greatly, the traditional economizer is often difficult to ensure the stable operation of the SCR denitration device at low load, resulting in excessive NOx emissions.

[0030] Example 2

[0031] On the basis of Example 1, the primary economizer 1 and the secondary economizer 6 bodies are made of corrosion-resistant and wear-resistant materials (such as stainless steel or high-alloy steel).

[0032] Optionally, the economizer with wide load adaptability further includes: a temperature sensor and a controller for real-time monitoring of the outlet flue gas temperature and water temperature of the first-stage economizer 1 and the second-stage economizer 6, and automatically adjusting the flow rates of the solenoid valve 11 and the solenoid valve 2 12 according to preset parameters to achieve intelligent control of the economizer.

[0033] Optionally, the economizer with wide load adaptability further includes an alarm device connected to the controller. When the flue gas temperature at the inlet of the SCR denitrification device 4 exceeds a preset range, the alarm device sends an alarm signal to remind the operator to take timely measures.

[0034] The working principle and beneficial effects of the above technical scheme are as follows: by using corrosion-resistant and wear-resistant materials for the main bodies of the first-stage economizer 1 and the second-stage economizer 6, it is beneficial to improve the service life and reliability of the economizer; by setting a temperature sensor and a controller, it is beneficial to automatically adjust the flow size of the solenoid valve 11 and the solenoid valve 2 12 according to preset parameters, so as to realize the intelligent control of the economizer; by setting an alarm device, it is beneficial to detect the temperature inside the SCR denitrification device 4 in real time, and respond in real time according to the temperature inside the SCR denitrification device 4, which is very convenient and practical.

[0035] Example 3

[0036] On the basis of Example 1-2, Figure 2-4 As shown, an economizer with wide load adaptability, the coal ash processing device includes: a liquid storage chamber 13, the liquid storage chamber 13 is arranged on the inner wall of the right end of the economizer outlet ash hopper box 9, the fixed block 14 is fixedly installed on the inner wall of the right side of the driving chamber 15, and the left end of the fixed block 14 is fixedly installed with a bidirectional driving motor 16, the front and rear end output shafts of the bidirectional driving motor 16 are respectively fixedly installed with a turntable 17 and a turntable 2 18, the turntable 17 is connected to the coal ash dust reduction mechanism, and the turntable 2 18 is connected to the coal cinder crushing mechanism.

[0037] Optionally, the coal ash crushing mechanism includes: a support rod 19, one end of the support rod 19 is movably connected to the turntable 18, and the other end of the support rod 19 passes through the driving chamber 15 and is movably connected to the connecting block 20, the left end of the connecting block 20 is fixedly mounted on a crushing rod 21, and the crushing rod 21 is slidably connected to the filter plate 22, and the filter plate 22 is fixedly mounted on the inner wall of the processing chamber 23 set at the left end of the economizer outlet ash hopper box 9, the crushing rod 24 is fixedly mounted on the inner wall of the processing chamber 23 at the left top end of the filter plate 22, and the crushing rod 21 and the crushing rod 24 are located on the same horizontal plane, the processing chamber 23 is connected to the first-level economizer 1 or the second-level economizer 6 through a through hole 25, and the bottom end of the processing chamber 23 is connected to the ash outlet 26.

[0038] Optionally, the coal ash dust reduction mechanism includes: a support rod 27, one end of which is movably connected to a turntable 17, the other end of which passes through a pressurizing chamber 29 and is movably connected to a connecting block 28, and the bottom end of the connecting block 28 is fixedly mounted on a piston 30, the piston 30 is slidably connected to the inner wall of the pressurizing chamber 29, both ends of a connecting pipe 31 are respectively connected to the liquid storage chamber 13 and the pressurizing chamber 29, and a reverse flow valve 32 is fixedly installed in the connecting pipe 31, one end of a connecting pipe 33 is connected to the pressurizing chamber 29, and the other end of the connecting pipe 33 is connected to a spraying assembly, and a reverse flow valve 34 is fixedly installed in the connecting pipe 33.

[0039] Optionally, the spray assembly includes: a regulating box 35, the regulating box 35 is arranged on the inner wall of the economizer outlet ash hopper box 9 at the right bottom end of the processing chamber 23, and the processing chamber 23 is connected to the left end of the regulating box 35, the connecting pipe 33 is connected to the connecting hose 36, and the two ends of the connecting hose 36 are respectively connected to one end of the short pipe 37, and the other end of the short pipe 37 is connected to the nozzle 38, the drive motor 40 is fixedly installed on the inner wall of the regulating box 35, and the output shaft of the drive motor 40 is fixed A threaded rod 41 is installed, the other end of which is rotatably connected to a mounting frame 42, and the right end of the mounting frame 42 is fixedly mounted on the inner wall of the adjusting box 35, a threaded sleeve 43 is threadedly connected to the threaded rod 41, and the front and rear ends of the threaded sleeve 43 are respectively movably connected to a support rod three 44, and the other end of the support rod three 44 is movably connected to a sliding rod 45, and the sliding rod 45 is slidably connected to the inner wall of a slide groove 46 front and back, and the other end of the sliding rod 45 is fixedly connected to the short tube 37 through a short rod 39.

[0040] The working principle of the above technical solution is as follows: when the coal ash produced by the first-stage economizer 1 or the second-stage economizer 6 falls into the economizer outlet ash hopper box 9, there will be large pieces of coal cinder blocks that cannot fall, thereby blocking the passage opening, so by starting the two-way drive motor 16, the two-way drive motor 16 rotates to drive the turntable 17 and the turntable 2 18 to rotate, the turntable 2 18 rotates to drive the support rod 19 movably connected thereto to rotate in a circle, the support rod 19 moves to drive the connecting block 20 movably connected thereto and the crushing rod 21 fixedly connected to the connecting block 20 to move left and right on the filter plate 22, and then cooperates with the crushing rod 24 fixedly connected to the left end of the processing chamber 23 to repeatedly crush the coal cinder blocks, and then the coal cinder blocks of appropriate size will fall through the electromagnetic valve 11, in order to prevent the fallen coal cinder blocks from polluting the air, the rotation of the turntable 17 drives the support rod 27 to move up and down, driving the piston 30 accordingly When the piston 30 moves up, water is pumped into the pressurizing chamber 29 through the connecting pipe 1 31. When the piston 30 moves downward, it drives the water in the pressurizing chamber 29 to be transported to the connecting hose 36 through the connecting pipe 2 33. Then the water in the connecting hose 36 is sprayed out from the nozzle 38 through the short tube 37. Then the driving motor 40 is started (the driving motor 40 is a forward and reverse motor). The driving motor 40 rotates and drives the threaded rod 41 to rotate accordingly. The rotation of the threaded rod 41 drives the threaded sleeve 43 threadedly connected to it to move left and right on the threaded rod 41. The left and right movement of the threaded sleeve 43 drives the support rod 3 44 movably connected to it to move accordingly, so that the sliding rod 45 slides back and forth in the sliding groove 46, thereby driving the short rod 39 to move back and forth. The movement of the short rod 39 drives the short tube 37 to move accordingly, so that the nozzle 38 moves back and forth, so that the fallen coal ash is fully dusted, thereby reducing the impact of the coal ash on the environment.

[0041] The beneficial effects of the above technical solution are as follows: by setting the bidirectional drive motor 16, the turntable 1 17 and the turntable 2 18, it is beneficial to drive the coal ash dust reduction mechanism and the coal slag crushing mechanism to operate through the bidirectional drive motor 16; by setting the support rod 19 and the crushing rod 1 21, it is beneficial to drive the crushing rod 1 21 and the crushing rod 24 to crush the coal slag blocks by moving the support rod 19 left and right; by setting the filter plate 22, it is beneficial to allow coal slag blocks or coal ash of appropriate size to pass through, thereby preventing the coal slag blocks from falling and blocking the ash outlet 26; by setting the support rod 27 and the piston 30, it is beneficial to transport the water in the liquid storage chamber 13 to the regulating box 35 through the pressure effect; by setting the backflow valve 1 32 and the backflow valve 2 34, it is beneficial to prevent the liquid from flowing back; by setting the drive motor 40, it is beneficial to drive the operation of the spray assembly; by setting the threaded rod 41 and the threaded sleeve 43, it is beneficial to realize the forward and backward movement of the slide rod 45, thereby realizing the forward and backward movement of the nozzle 38, so that the dust reduction treatment range is improved, which is very convenient and practical.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal economizer with wide load adaptability, characterized in that: include: A first-stage economizer (1), wherein the left side of the first-stage economizer (1) is connected to the tail flue of the coal-fired boiler, and the left bottom end of the first-stage economizer (1) is connected to the main water supply pipe (2), and the first-stage economizer (1) is connected to the input end of the SCR denitration device (4) through the first flue (3), and the output end of the SCR denitration device (4) is connected to the second-stage economizer (6) through the second flue (5), and the left bottom end of the second-stage economizer (6) is connected to the water supply bypass pipe (7), and the bottom end of the second-stage economizer (6) is connected to the third flue (8), and the bottom ends of the first-stage economizer (1) and the second-stage economizer (6) are both provided with economizer outlet ash hopper boxes (9), and a coal ash treatment device is provided in the economizer outlet ash hopper boxes (9); The coal ash processing device comprises: a liquid storage chamber (13), the liquid storage chamber (13) being arranged on the inner wall of the right end of the ash hopper box (9) at the economizer outlet, a fixed block (14) being fixedly mounted on the inner wall of the right side of the driving chamber (15), and a bidirectional driving motor (16) being fixedly mounted on the left end of the fixed block (14), a turntable 1 (17) and a turntable 2 (18) being fixedly mounted on the front and rear end output shafts of the bidirectional driving motor (16), respectively, the turntable 1 (17) being connected to a coal ash dust reduction mechanism, and the turntable 2 (18) being connected to a coal cinder crushing mechanism; The coal slag crushing mechanism comprises: a support rod (19), one end of which is movably connected to a turntable (18), and the other end of which passes through a driving chamber (15) and is movably connected to a connecting block (20), the left end of which is fixedly mounted on a crushing rod (21), and the crushing rod (21) is slidably connected to a filter plate (22), and the filter plate (22) is fixedly mounted on an inner wall of a processing chamber (23) provided at the left end of an economizer outlet ash hopper box (9), a crushing rod (24) is fixedly mounted on an inner wall of the processing chamber (23) at a top left end of the filter plate (22), and the crushing rod (21) and the crushing rod (24) are located on the same horizontal plane, the processing chamber (23) is connected to a primary economizer (1) or a secondary economizer (6) through a through hole (25), and the bottom end of the processing chamber (23) is connected to an ash outlet (26); The coal ash dust reduction mechanism comprises: a second support rod (27), one end of the second support rod (27) is movably connected to the first turntable (17), the other end of the second support rod (27) passes through the pressurizing chamber (29) and is movably connected to the second connecting block (28), and the bottom end of the second connecting block (28) is fixedly mounted on the piston (30), and the piston (30) is slidably connected to the inner wall of the pressurizing chamber (29) up and down, the two ends of the first connecting pipe (31) are respectively connected to the liquid storage chamber (13) and the pressurizing chamber (29), and a reverse flow valve (32) is fixedly installed in the first connecting pipe (31), one end of the second connecting pipe (33) is connected to the pressurizing chamber (29), and the other end of the second connecting pipe (33) is connected to the spraying assembly, and a reverse flow valve (34) is fixedly installed in the second connecting pipe (33).

2. The economizer with wide load adaptability according to claim 1, characterized in that A fourth flue (10) is connected between the first flue (3) and the third flue (8), and electromagnetic valve 1 (11) and electromagnetic valve 2 (12) are respectively provided at two ends of the fourth flue (10).

3. The economizer with wide load adaptability according to claim 1, characterized in that The sizes of the heating surfaces of the first-stage economizer (1) and the second-stage economizer (6) are optimized according to the design load of the unit and the flue gas characteristics to ensure that the flue gas waste heat can be effectively recovered and the feed water can be heated under different loads.

4. The economizer with wide load adaptability according to claim 3, characterized in that The primary economizer (1) and the secondary economizer (6) are made of corrosion-resistant and wear-resistant materials.

5. The economizer with wide load adaptability according to claim 1, characterized in that: Also includes: The temperature sensor and controller are used to monitor the flue gas temperature and water temperature at the outlets of the first economizer (1) and the second economizer (6) in real time, and automatically adjust the flow rates of the electromagnetic valve 1 (11) and the electromagnetic valve 2 (12) according to preset parameters, so as to realize intelligent control of the economizer.

6. The economizer with wide load adaptability according to claim 5, characterized in that: It also includes an alarm device connected to the controller. When the temperature of the flue gas at the inlet of the SCR denitrification device (4) exceeds a preset range, the alarm device sends an alarm signal to remind the operator to take timely measures.

7. The economizer with wide load adaptability according to claim 1, characterized in that: The spray assembly comprises: a regulating box (35), the regulating box (35) being arranged on the inner wall of the economizer outlet ash hopper box (9) at the right bottom end of the processing chamber (23), and the processing chamber (23) being connected to the left end of the regulating box (35), the connecting pipe (33) being connected to the connecting hose (36), and the two ends of the connecting hose (36) being respectively connected to one end of a short tube (37), and the other end of the short tube (37) being connected to the nozzle (38), the driving motor (40) being fixedly mounted on the inner wall of the regulating box (35), and the output shaft of the driving motor (40) being fixedly mounted with A threaded rod (41), the other end of which is rotatably connected to a mounting frame (42), and the right end of which is fixedly mounted on the inner wall of an adjustment box (35), a threaded sleeve (43) is threadedly connected to the threaded rod (41), the front and rear ends of which are movably connected to a third support rod (44), and the other end of which is movably connected to a slide rod (45), the slide rod (45) is slidably connected to the inner wall of a slide groove (46), and the other end of which is fixedly connected to a short tube (37) via a short rod (39).

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