Coal economizer with ash cleaning function

Abstract

This utility model relates to the field of economizer technology. An economizer with a dust removal function includes a shell. An air inlet hopper is fixedly connected to the left end of the shell, and an exhaust hopper is fixedly connected to the right end. A movable dust-blowing mechanism is installed on the top of the shell. Two frames are symmetrically fixedly connected to the front and rear of the shell. Mounting plates are fixedly installed inside each frame, and a heat exchange tube is connected between the two mounting plates. An anti-wear tile is fixedly installed on the side of the heat exchange tube closest to the exhaust hopper. This utility model achieves localized protection of the heat exchange tube by installing an anti-wear tile on the side of the heat exchange tube closest to the air inlet hopper, preventing wear and damage and extending the service life of the equipment. Through the movable dust-blowing mechanism, the lateral movement component drives the cleaning component to reciprocate laterally, using the cleaning component to reciprocate laterally blow air onto the surface of the heat exchange tube to remove ash, reducing ash accumulation on the surface of the heat exchange tube and improving the heat exchange efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of economizer technology, specifically relating to an economizer with ash removal function. Background Technology

[0002] The economizer is an important piece of equipment in a boiler system, primarily used to improve the boiler's thermal efficiency. It recovers waste heat from the flue gas to preheat the boiler feedwater. Economizers are typically located in the tail flue of the boiler, where the flue gas flows laterally through the economizer tube bundle, transferring heat to the feedwater flowing inside the tubes. The feedwater flows through the economizer before entering the steam drum, where it is heated to near saturation temperature.

[0003] The existing economizer has the following problems: severe ash accumulation at the economizer inlet, and varying degrees of ash and scale accumulation in the other three tube bundles, resulting in reduced heat exchange area and decreased thermal efficiency; severe wear on the anti-wear tiles and wear on the walls of some serpentine tubes, increasing the risk of leakage. Utility Model Content

[0004] The purpose of this utility model is to provide a coal saver with a simple structure and reasonable design that has a ash removal function in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] An economizer with a dust removal function includes a shell, an air inlet hopper fixedly connected to the left end of the shell, an exhaust hopper fixedly connected to the right end of the shell, a movable dust blowing mechanism provided on the top of the shell, and two frames symmetrically and fixedly connected to the front and rear of the shell. An installation plate is fixedly installed inside each of the two frames, and a heat exchange tube is connected between the two installation plates. A wear-resistant tile is fixedly installed on the side of the heat exchange tube near the exhaust hopper.

[0007] Preferably, a No. 1 flange is fixedly installed on the left side of the air intake hopper, a No. 2 flange is fixedly connected to the right side of the exhaust hopper, support legs are fixedly installed at the four corners of the bottom of the outer casing, and a filter screen is detachably installed at the center of the bottom of the outer casing.

[0008] Preferably, the heat exchange tube includes an inlet end and an outlet end, both of which are fixedly inserted through the rear side of the outer casing.

[0009] Preferably, the mobile dust blowing mechanism includes a traversing component and a cleaning component, with the cleaning component disposed between the traversing component and the housing.

[0010] Preferably, the lateral movement assembly includes two base plates symmetrically fixedly installed on the top of the housing. Side plates are fixedly installed on the left and right sides of the top of the two base plates. A lead screw passes through the two side plates and rotates together. A servo motor is fixedly connected to the left side plate. The output end of the servo motor rotates through the side plate and is fixedly connected to the center of the left side of the lead screw. A movable block is threadedly connected to the middle of the lead screw through a ball nut. A guide rod slides through the bottom of the movable block. The guide rod is fixedly installed between the two side plates. A fixing frame is fixedly connected to the top of the two movable blocks.

[0011] Preferably, the cleaning component includes a slide rail fixedly installed on the top of the base plate, with several sliders slidably connected on each of the two slide rails. Two symmetrical sliders are fixedly mounted on their tops with an arc-shaped frame. A telescopic tarpaulin is fixedly installed between two adjacent arc-shaped frames. Several arc-shaped frames located in the middle of the outer shell are fixedly connected through a fixed sleeve. The front and rear ends of the fixed sleeve are fixedly connected to two fixed frames respectively. A cross is fixedly installed at the top inside the fixed sleeve. A drive motor is fixedly installed at the bottom of the cross. Several fan blades are fixedly installed at the bottom of the output end of the drive motor.

[0012] The beneficial effects of this utility model are as follows: By installing anti-wear tiles on the side of the heat exchange tube near the air inlet, this utility model achieves local protection of the heat exchange tube, avoids wear and damage to the heat exchange tube, and extends the service life of the equipment. Through the setting of the moving dust blowing mechanism, the lateral moving component drives the cleaning component to move back and forth laterally, and uses the cleaning component to blow air back and forth to remove dust from the surface of the heat exchange tube, reducing the dust accumulation on the surface of the heat exchange tube and improving the heat exchange efficiency of the heat exchange tube. Attached Figure Description

[0013] Figure 1 This is a three-dimensional top view of the overall structure of this utility model;

[0014] Figure 2 This is a partial sectional view of the overall structure of this utility model;

[0015] Figure 3 This is the utility model Figure 2 Enlarged view of region A in the middle;

[0016] Figure 4 This is a three-dimensional bottom view of the overall structure of this utility model;

[0017] Figure 5 This is a three-dimensional view of the heat exchange tube, mounting plate, frame, and wear-resistant tile of this utility model.

[0018] In the diagram: 1. Outer shell; 2. No. 1 flange; 3. Moving dust blowing mechanism; 31. Lateral movement assembly; 311. Servo motor; 312. Lead screw; 313. Movable block; 314. Fixed frame; 315. Side plate; 316. Guide rod; 317. Base plate; 32. Cleaning assembly; 321. Drive motor; 322. Fixed sleeve; 323. Cross; 324. Telescopic tarpaulin; 325. Arc-shaped frame; 326. Slider; 327. Slide rail; 4. Exhaust hopper; 5. No. 2 flange; 6. Support leg; 7. Heat exchange tube; 8. Air inlet hopper; 9. Filter screen; 10. Mounting plate; 11. Frame; 12. Wear-resistant tile. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example

[0021] Please see Figure 1 , Figure 4 and Figure 5 An economizer with a dust removal function includes an outer shell 1. An air inlet hopper 8 is fixedly connected to the left end of the outer shell 1, and an exhaust hopper 4 is fixedly connected to the right end of the outer shell 1. A movable dust blowing mechanism 3 is provided on the top of the outer shell 1. Two frames 11 are symmetrically fixedly connected to the front and rear of the outer shell 1. An installation plate 10 is fixedly installed inside each of the two frames 11. A heat exchange tube 7 is connected between the two installation plates 10. A wear-resistant tile 12 is fixedly installed on the side of the heat exchange tube 7 near the exhaust hopper 4. A first flange 2 is fixedly installed on the left side of the air inlet hopper 8, and a second flange 5 is fixedly connected to the right side of the exhaust hopper 4. Support legs 6 are fixedly installed at the four corners of the bottom of the outer shell 1. A filter screen 9 is detachably installed at the center of the bottom of the outer shell 1. The heat exchange tube 7 includes a water inlet end and a water outlet end, both of which are fixedly connected through the rear side of the outer shell 1.

[0022] In use, the support leg 6 is used to support the outer shell 1, the first flange 2 is used to connect to the boiler exhaust duct, the movable dust blowing mechanism 3 is used to reciprocate to blow away the dust accumulated on the heat exchange tube 7, the heat exchange tube 7 is used for heat exchange and to absorb the heat in the boiler waste dust, and the wear-resistant tile 12 is used to enhance the wear resistance of the heat exchange tube 7.

[0023] Please see Figure 1 and Figure 2The mobile dust blowing mechanism 3 includes a transverse component 31 and a cleaning component 32. The cleaning component 32 is disposed between the transverse component 31 and the outer casing 1. The transverse component 31 includes two base plates 317 symmetrically fixedly installed on the top of the outer casing 1. Side plates 315 are fixedly installed on the left and right sides of the top of the two base plates 317. A lead screw 312 is rotatably passed through the two side plates 315. A servo motor 311 is fixedly connected to the left side plate 315. The output end of the servo motor 311 rotates through the side plate 315 and is fixedly connected to the center of the left side of the lead screw 312. A movable block 313 is threadedly connected to the middle of the lead screw 312 through a ball nut. A guide rod 316 slides through the bottom of the movable block 313. The guide rod 316 is fixedly installed between the two side plates 315. A fixing frame 314 is fixedly connected to the top of the two movable blocks 313.

[0024] Please see Figure 2 and Figure 3 The cleaning component 32 includes a slide rail 327 fixedly installed on the top of the base plate 317. Several sliders 326 are slidably connected on both slide rails 327. An arc-shaped frame 325 is fixedly installed on the top of two symmetrical sliders 326. A telescopic tarpaulin 324 is fixedly installed between two adjacent arc-shaped frames 325. Several arc-shaped frames 325 located in the middle of the outer shell 1 are fixedly connected through a fixing sleeve 322. The front and rear ends of the fixing sleeve 322 are fixedly connected to two fixing frames 314 respectively. A cross 323 is fixedly installed on the top of the inside of the fixing sleeve 322. A drive motor 321 is fixedly installed on the bottom of the cross 323. Several fan blades are fixedly installed on the bottom of the output end of the drive motor 321.

[0025] When it is necessary to clean the surface of the heat exchange tube 7, the drive motor 321 is started. The output of the drive motor 321 drives multiple fan blades to rotate synchronously at high speed. The fan blades are used to blow air to clean the dust accumulated on the surface of the heat exchange tube 7. At the same time, the servo motor 311 is started. The output of the servo motor 311 drives the lead screw 312 to rotate, which drives the movable block 313 and the fixed frame 314 on it to move laterally. At the same time, it drives the fixed sleeve 322 and the cross 323 on it to move laterally. Simultaneously, it drives the drive motor 321 and the fan blades on it to move laterally. The fan blades are used to blow air to clean the dust accumulated on the heat exchange tube 7. Reversing the servo motor 311 will realize the reverse lateral movement and air blowing cleaning, thereby realizing reciprocating lateral movement and air blowing cleaning. While moving laterally, it drives the arc frame 325 and the slider 326 on it to slide along the slide rail 327, which simultaneously drives the extension and retraction of the telescopic tarpaulin 324. The telescopic tarpaulin 324 is used to ensure the sealing of the inside of the outer shell 1.

[0026] It should be noted that this economizer with ash removal function is used by first fixing flange 2 to the boiler exhaust flue, and then connecting flange 5 to the exhaust pipe. At this time, the high-temperature flue gas from the boiler enters the interior of the outer shell 1 through the air inlet hopper 8, while clean water from the outside enters through the water inlet end of the heat exchange tube 7. The clean water exchanges heat with the high-temperature flue gas, and the hot water after heat exchange is discharged from the drain end of the heat exchange tube 7. The cooled flue gas is transported from the exhaust hopper 4 to the exhaust pipe for discharge. When it is necessary to clean the ash accumulation on the heat exchange tube 7, the drive motor 321 is started. The output end of 21 drives multiple fan blades to rotate synchronously at high speed, using the fan blades to blow air to clean the dust accumulated on the surface of the heat exchange tube 7. At the same time, the servo motor 311 is started. The output end of the servo motor 311 drives the lead screw 312 to rotate, which drives the movable block 313 and the fixed frame 314 on it to move laterally. At the same time, it drives the fixed sleeve 322 and the cross 323 on it to move laterally, which synchronously drives the drive motor 321 and the fan blades on it to move laterally. The fan blades blow air to clean the dust accumulated on the heat exchange tube 7. Reversing the servo motor 311 will realize the reverse lateral blowing cleaning, thus realizing reciprocating lateral blowing cleaning.

[0027] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A coal economizer with ash cleaning function, comprising a shell (1), characterized in that: The left end of the outer shell (1) is fixedly connected to an air inlet hopper (8), the right end of the outer shell (1) is fixedly connected to an exhaust hopper (4), a movable dust blowing mechanism (3) is provided on the top of the outer shell (1), and two frames (11) are symmetrically fixedly connected to the front and back of the outer shell (1). An installation plate (10) is fixedly installed inside the two frames (11), and a heat exchange tube (7) is connected between the two installation plates (10). A wear-resistant tile (12) is fixedly installed on the side of the heat exchange tube (7) near the exhaust hopper (4).

2. The coal economizer with ash removal function according to claim 1, characterized in that: The intake hopper (8) has a first flange (2) fixedly installed on the left side, the exhaust hopper (4) has a second flange (5) fixedly connected to the right side, the bottom of the outer shell (1) has four support legs (6) fixedly installed at the four corners, and the bottom of the outer shell (1) has a filter screen (9) detachably installed at the center.

3. The coal economizer with ash removal function according to claim 1, characterized in that: The heat exchange tube (7) includes an inlet end and an outlet end, both of which are fixedly inserted through the rear side of the outer shell (1).

4. The coal economizer with ash removal function according to claim 1, characterized in that: The mobile dust blowing mechanism (3) includes a traversing component (31) and a cleaning component (32), with the cleaning component (32) disposed between the traversing component (31) and the housing (1).

5. The coal economizer with ash cleaning function according to claim 4, characterized in that: The transverse component (31) includes two base plates (317) symmetrically fixedly installed on the top of the outer shell (1). Side plates (315) are fixedly installed on the left and right sides of the top of the two base plates (317). A lead screw (312) is rotatably passed through the two side plates (315). A servo motor (311) is fixedly connected to the side plate (315) on the left side. The output end of the servo motor (311) rotates through the side plate (315) and is fixedly connected to the center of the left side of the lead screw (312). A movable block (313) is threadedly connected to the middle of the lead screw (312) through a ball nut. A guide rod (316) slides through the bottom of the movable block (313). The guide rod (316) is fixedly installed between the two side plates (315). A fixing frame (314) is fixedly connected to the top of the two movable blocks (313).

6. The coal economizer with ash removal function according to claim 4, characterized in that: The cleaning component (32) includes a slide rail (327) fixedly installed on the top of the base plate (317). Several sliders (326) are slidably connected on both slide rails (327). An arc-shaped frame (325) is fixedly installed on the top of two symmetrical sliders (326). A telescopic tarpaulin (324) is fixedly installed between two adjacent arc-shaped frames (325). Several arc-shaped frames (325) located in the middle of the outer shell (1) are fixedly connected through a fixed sleeve (322). The front and rear ends of the fixed sleeve (322) are fixedly connected to two fixed frames (314) respectively. A cross (323) is fixedly installed on the top of the inside of the fixed sleeve (322). A drive motor (321) is fixedly installed on the bottom of the cross (323). Several fan blades are fixedly installed on the bottom of the output end of the drive motor (321).

Images