Coal economizer ash bucket anti-blocking device

Abstract

The application provides an economizer ash bucket anti-blocking device, and relates to the technical field of boiler system safety. The economizer ash bucket anti-blocking device comprises: a filtering assembly arranged in an ash falling pipe, the filtering assembly is arranged to retain large particle coke blocks on the filtering assembly and allow small particle coke blocks to be discharged from the ash falling pipe; a crushing assembly arranged in the ash falling pipe above the filtering assembly, used for crushing the large particle coke blocks retained on the filtering assembly into small particle coke blocks; an air feeding assembly arranged at an inlet position of the ash falling pipe, used for feeding air into the ash falling pipe, and the airflow fed into the ash falling pipe is used for assisting the small particle coke blocks to be discharged from the ash falling pipe; and a controller in signal connection with the crushing assembly and the air feeding assembly, used for controlling the start and stop of the crushing assembly and the air feeding assembly. The economizer ash bucket anti-blocking device solves the problem that, in the prior art, the change of the coal type burned by a boiler causes the heating surface to be coked, and the coke blocks generated by coking easily block the ash falling pipe connected with the ash bucket of the economizer.

Description

Technical Field

[0001] This invention relates to the field of boiler system safety technology, specifically to an economizer ash hopper anti-clogging device. Background Technology

[0002] After the coal type of the unit is changed, the boiler experiences problems such as decreased boiler efficiency, increased desuperheating water volume, increased flue gas temperature, high-temperature corrosion of water-cooled walls, and coking of heating surfaces. Coking of the heating surfaces leads to blockage of the ash discharge pipes connected to the economizer ash hopper in some boilers, causing poor ash conveying and affecting the safe and stable operation of the boiler system.

[0003] Therefore, a new device is urgently needed to solve at least one of the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an economizer ash hopper anti-clogging device to solve the problem in the prior art where coking of the heating surface due to changes in the type of coal burned in the boiler causes coke to easily block the ash discharge pipe connected to the economizer ash hopper.

[0005] To achieve the above objectives, the present invention provides an economizer ash hopper anti-clogging device for clearing blockages in the ash discharge pipe connected to the economizer ash hopper. The economizer ash hopper anti-clogging device comprises:

[0006] A filter assembly is installed inside the ash collection pipe. The filter assembly is configured to retain large coke particles on the filter assembly and allow small coke particles to be discharged from the ash collection pipe.

[0007] The crushing component, located inside the ash discharge pipe and above the filter assembly, is used to crush large coke particles that remain on the filter assembly into smaller coke particles that can be discharged from the ash discharge pipe.

[0008] An air supply assembly is installed at the inlet of the ash discharge pipe to supply air into the ash discharge pipe. The airflow supplied into the ash discharge pipe is used to assist small coke particles to be discharged from the ash discharge pipe.

[0009] The controller is signal-connected to the crushing component and the air supply component, and is used to control the start and stop of the crushing component and the air supply component.

[0010] Specifically, the economizer ash hopper anti-clogging device further includes: multiple temperature detectors, installed inside the ash discharge pipe and located above the filter assembly, for detecting the temperature value of large coke particles retained on the filter assembly and sending the temperature value to the controller;

[0011] The controller is used to control the start and stop of the crushing component based on the temperature value.

[0012] Specifically, the temperature detector is a thermocouple.

[0013] Specifically, the filtration assembly includes: a filter screen and a vibrator;

[0014] The filter screen is installed inside the ash collection pipe, allowing small coke particles to pass through the filter pores of the filter screen;

[0015] The vibrator is installed inside the ash collection pipe, below the filter screen, and is used to vibrate the filter screen to assist small coke particles to pass through the filter pores of the filter screen.

[0016] Specifically, the crushing assembly includes a pair of extrusion mechanisms symmetrically arranged inside the ash discharge pipe, used to extrude large coke particles retained on the filter screen into smaller coke particles.

[0017] Specifically, a pair of extrusion holes are correspondingly provided on the ash discharge pipe;

[0018] Each extrusion mechanism includes: an extrusion plate, an extrusion rod, and an extrusion driver;

[0019] The extrusion plate is disposed inside the ash discharge pipe;

[0020] The extrusion rod has a movable end and a connecting end. The movable end extends into the ash discharge pipe through a corresponding extrusion hole and connects to the extrusion plate. The extrusion rod can move along the extension direction of the corresponding extrusion hole.

[0021] The extrusion actuator is disposed on the outer wall of the ash discharge pipe and is used to drive the extrusion rod to move along the extension direction of the corresponding extrusion through hole.

[0022] Specifically, the air delivery assembly includes: a fan and multiple air nozzles;

[0023] Multiple air nozzles are evenly distributed along the circumference of the ash collection pipe on the inner wall of the ash collection pipe, and each air nozzle forms a first given angle with the center line of the ash collection pipe, so that air is delivered into the ash collection pipe through the multiple air nozzles.

[0024] A blower is used to deliver air to each nozzle.

[0025] Specifically, the first given included angle is between 30° and 80°.

[0026] Specifically, the economizer ash hopper anti-clogging device further includes an ash hopper, which is connected to the outlet of the ash discharge pipe and is used to recover small coke particles discharged from the ash discharge pipe.

[0027] Specifically, the economizer ash hopper anti-clogging device further includes an ash conveying pump, which is installed at the ash outlet of the ash hopper and is used to pump out small coke particles from the ash hopper.

[0028] The economizer ash hopper anti-clogging device provided by this invention has a filter assembly installed in the ash discharge pipe connected to the economizer ash hopper to filter coke lumps falling from the ash hopper. Small coke lumps can pass through the filter assembly and be discharged directly from the ash discharge pipe, while large coke lumps remain on the filter assembly. A crushing assembly installed above the filter assembly can crush the large coke lumps remaining on the filter assembly into smaller coke lumps. The small coke lumps formed after crushing the large coke lumps can be discharged from the ash discharge pipe. In order to accelerate the rapid discharge of small coke lumps from the ash discharge pipe, an air supply assembly is installed to supply air into the ash discharge pipe. The air supplied into the ash discharge pipe forms an airflow that carries the small coke lumps through the crushing assembly and is discharged from the ash discharge pipe. After the large coke lumps are concentrated on the filter assembly, they are crushed by the crushing assembly. This not only facilitates the handling of large coke lumps, but also avoids clogging of the ash discharge pipe. It solves the problem in the prior art that the coke lumps generated by coking on the heating surface due to changes in the type of coal burned in the boiler easily clog the ash discharge pipe connected to the economizer ash hopper.

[0029] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention.

[0031] In the attached diagram:

[0032] Figure 1 This is a schematic diagram of the layout of the economizer ash hopper anti-clogging device provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the crushing component in the economizer ash hopper anti-clogging device provided in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures

[0035] 1-Ash hopper; 2-Filter assembly; 3-Crushing assembly; 4-Air supply assembly; 5-Temperature detector; 6-Ash container; 7-Ash pump; 8-Economizer; 9-Boiler; 11-Ash discharge pipe; 21-Filter screen; 22-Vibrator; 31-Extrusion plate; 32-Extrusion rod; 33-Extrusion driver; 41-Air nozzle. Detailed Implementation

[0036] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0037] Figure 1This is a schematic diagram of the layout of the economizer ash hopper anti-clogging device; Figure 2 This is a schematic diagram of the crushing component in the economizer ash hopper anti-clogging device.

[0038] like Figures 1-2 As shown, the present invention provides an economizer ash hopper anti-clogging device for clearing blockages in the ash discharge pipe 11 connected to the ash hopper 1 of the economizer 8. The economizer ash hopper anti-clogging device includes:

[0039] A filter assembly 2 is disposed inside the ash collection pipe 11. The filter assembly 2 is configured to retain large coke particles on the filter assembly 2 and allow small coke particles to be discharged from the ash collection pipe 11.

[0040] The crushing component 3 is installed inside the ash discharge pipe 11, above the filter component 2, and is used to crush large coke particles that remain on the filter component 2 into small coke particles that can be discharged from the ash discharge pipe 11.

[0041] The air supply component 4 is located at the inlet of the ash discharge pipe 11 and is used to supply air into the ash discharge pipe 11. The airflow supplied into the ash discharge pipe 11 is used to assist small coke particles to be discharged from the ash discharge pipe 11.

[0042] The controller is connected to the pulverizing component 3 and the air supply component 4 by signal, and is used to control the start and stop of the pulverizing component 3 and the air supply component 4.

[0043] The economizer ash hopper anti-clogging device provided by this invention, such as Figure 1As shown, the flue gas generated by the combustion of coal in boiler 9 is discharged from the flue gas outlet of boiler 9 through a flue connected to the flue gas outlet. The economizer 8 installed in the flue can absorb the residual heat in the flue gas. After the type of coal fed into boiler 9 changes, the coke formed in the furnace of boiler 9 and in the flue connected to the flue gas outlet will fall into the ash hopper 1 of economizer 8 with the flue gas, and then be discharged from the ash pipe 11 connected to the ash hopper 1. In order to prevent coke from clogging the ash pipe 11, a filter assembly 2 is installed in the ash pipe 11. The coke discharged from the ash pipe 11 is filtered by the filter assembly 2. Large coke particles are retained on the filter assembly 2, while small coke particles pass through the filter assembly 2 and are discharged from the ash pipe 11. The filter assembly 2 collects the large coke particles to a designated position in the ash pipe 11, and then discharges them through the filter assembly 2. The crushing component 3 above the filter component 2 crushes the large coke particles stuck on the filter component 2 into smaller coke particles. The small coke particles formed by crushing are discharged directly from the ash discharge pipe 11 after passing through the filter component 2. In order to accelerate the discharge of small coke particles from the ash discharge pipe 11, an air supply component 4 is set to supply air into the ash discharge pipe 11. The airflow formed by the air supplied into the ash discharge pipe 11 carries the small coke particles through the filter component 2 and is discharged from the ash discharge pipe 11. In order to facilitate the control of the start-up and operation of the air supply component 4 and the crushing component 3, a controller is set to be connected to the crushing component 3 and the air supply component 4 to control the start-up and shutdown of the crushing component 3 and the air supply component 4. This solves the problem in the prior art that the coking of the heating surface caused by the change of the coal type of the boiler can easily block the ash discharge pipe connected to the ash hopper of the economizer.

[0044] To facilitate the controller's control of the start and stop of the crushing component 3, the economizer ash hopper anti-clogging device also includes: multiple temperature detectors 5, which are installed inside the ash discharge pipe 11 and located above the filter component 2, for detecting the temperature value of large coke particles retained on the filter component 2 and sending the temperature value to the controller.

[0045] The controller is used to control the start and stop of the crushing component 3 according to the temperature value.

[0046] The coke particles falling into the ash collection pipe 11 have a temperature. A temperature detector 5 is installed at a designated position above the filter assembly 2 inside the ash collection pipe 11. Multiple temperature detectors 5, which are thermocouples, can be evenly distributed on the inner wall of the ash collection pipe 11 at the same height above the filter assembly 2. When a certain amount of large coke particles accumulate and remain on the filter assembly 2, the accumulated large coke particles dissipate heat slowly, causing their temperature to remain constant. If the large coke particles continue to accumulate on the filter assembly 2, it will inevitably cause blockage. The temperature detector 5 sends the detected temperature value to the controller. The controller judges the received temperature value. If the temperature value is within a set first temperature threshold (300℃-400℃), it indicates that the large coke particles are dissipating heat slowly, and there is a blockage in the ash collection pipe 11. In case of a blockage, the controller sends a corresponding control command to the crushing component 3 to start the crushing component 3. The crushing component 3 begins to crush the large coke particles accumulated on the filter component 2. After the large coke particles are crushed into smaller coke particles, they can pass through the filter component 2 and be discharged from the ash discharge pipe 11. After the large coke particles remaining on the filter component 2 are crushed into smaller coke particles and discharged, the temperature detector 5 sends the detected temperature value to the controller. After receiving the temperature value, if the controller determines that the temperature value is within the set second temperature threshold (50℃-100℃), the temperature value detected by the temperature detector 5 will decrease because the large coke particles have been crushed and discharged. When the detected temperature value is between 50℃ and 100℃, it indicates that the blockage risk has been eliminated, and the controller can send a corresponding control command to the crushing component 3 to stop the crushing component, thereby avoiding energy waste.

[0047] To facilitate the separation of large and small coke particles, the filter assembly 2 includes: a filter screen 21 and a vibrator 22;

[0048] The filter screen 21 is disposed inside the ash collection pipe 11, and small coke particles can pass through the filter holes of the filter screen 21;

[0049] The vibrator 22 is disposed inside the ash discharge pipe 11, located below the filter screen 21, and is used to vibrate the filter screen 21 to assist small coke particles to pass quickly through the filter holes of the filter screen 21.

[0050] like Figure 2 As shown, a filter screen 21 is installed inside the ash discharge pipe 11 to filter coke particles. The coke particles that remain on the filter screen 21 are large coke particles, while the coke particles that can pass through the filter holes of the filter screen 21 are small coke particles. In order to prevent small coke particles from getting stuck in the filter holes of the filter screen 21, a vibrator 22 is installed to vibrate the filter screen 21 so that the small coke particles can quickly pass through the filter holes of the filter screen 21, while also preventing the small coke particles from getting stuck in the filter holes.

[0051] In one embodiment, such as Figures 1-2 As shown, the crushing component 3 includes a pair of extrusion mechanisms symmetrically arranged inside the ash discharge pipe 11, used to extrude large coke particles retained on the filter screen 21 into small coke particles.

[0052] A pair of extrusion holes are correspondingly provided on the ash discharge pipe 11;

[0053] Each extrusion mechanism includes: an extrusion plate 31, an extrusion rod 32, and an extrusion driver 33;

[0054] The extrusion plate 31 is disposed inside the ash discharge pipe 11;

[0055] The extrusion rod 32 has a movable end and a connecting end. The movable end extends into the ash discharge pipe 11 through a corresponding extrusion through hole and is connected to the extrusion plate 31. The extrusion rod 32 can move along the extension direction of the corresponding extrusion through hole.

[0056] The extrusion driver 33 is disposed on the outer wall of the ash discharge pipe 11 and is used to drive the extrusion rod 32 to move along the extension direction of the corresponding extrusion through hole.

[0057] A pair of extrusion mechanisms are symmetrically arranged inside the ash discharge pipe 11. When the extrusion plates 31 of the two extrusion mechanisms move towards each other, they can extrude large coke particles stuck on the filter screen 21, thereby crushing the large coke particles into small coke particles. The extrusion plates 31 are connected to the extrusion rods 32. When the extrusion driver 33 drives the extrusion rods 32 to move, it drives the extrusion plates 31 to move inside the ash discharge pipe 11, thereby continuously extruding large coke particles. The extrusion driver 33 can be a linear motor, a hydraulic cylinder, or a pneumatic cylinder.

[0058] In order to facilitate the airflow into the ash discharge pipe 11 to carry small coke particles through the filter screen 21 quickly, the air supply assembly 4 includes: a fan and multiple air nozzles 41.

[0059] Multiple air nozzles 41 are evenly distributed along the circumference of the ash collection pipe 11 on the inner wall of the ash collection pipe 11, and each air nozzle 41 forms a first given angle with the center line of the ash collection pipe 11, so that air is delivered into the ash collection pipe 11 through the multiple air nozzles 41.

[0060] A blower is used to deliver air to each nozzle 41.

[0061] The first given included angle is between 30° and 80°.

[0062] like Figure 1As shown, multiple air nozzles 41 are evenly distributed on the inner wall of the ash collection pipe 11. The ash collection pipe 11 is vertically arranged, and the first given angle between each air nozzle 41 and the center line of the ash collection pipe 11 is between 30° and 80°. In this way, the air sent into the ash collection pipe 11 by the fan through the air nozzles 41 can be blown to every part of the filter screen 21, ensuring that small particles of coke entering the ash collection pipe 11 can quickly pass through the filter holes of the filter screen 21 from any part of the filter screen 21. The air nozzles 41 are made of heat-resistant metal.

[0063] To prevent small coke particles discharged from the ash discharge pipe 11 from causing pollution, the economizer ash hopper anti-clogging device further includes an ash tank 6, which is connected to the outlet of the ash discharge pipe 11 and is used to recover the small coke particles discharged from the ash discharge pipe 11.

[0064] The economizer ash hopper anti-clogging device further includes an ash conveying pump 7, installed at the ash outlet of the ash hopper 6, for pumping out small coke particles from the ash hopper 6. The ash hopper 6 collects small coke particles, and the ash conveying pump 7 pumps the collected small coke particles in the ash hopper 6 to the required equipment or components for reuse.

[0065] The economizer ash hopper anti-clogging device provided by this invention has a filter assembly installed in the ash discharge pipe connected to the economizer ash hopper to filter coke lumps falling from the ash hopper. Small coke lumps can pass through the filter assembly and be discharged directly from the ash discharge pipe, while large coke lumps remain on the filter assembly. A crushing assembly installed above the filter assembly can crush the large coke lumps remaining on the filter assembly into smaller coke lumps. The small coke lumps formed after crushing the large coke lumps can be discharged from the ash discharge pipe. In order to accelerate the rapid discharge of small coke lumps from the ash discharge pipe, an air supply assembly is installed to supply air into the ash discharge pipe. The air supplied into the ash discharge pipe forms an airflow that carries the small coke lumps through the crushing assembly and is discharged from the ash discharge pipe. After the large coke lumps are concentrated on the filter assembly, they are crushed by the crushing assembly. This not only facilitates the handling of large coke lumps, but also avoids clogging of the ash discharge pipe. It solves the problem in the prior art that the coke lumps generated by coking on the heating surface due to changes in the type of coal burned in the boiler easily clog the ash discharge pipe connected to the economizer ash hopper.

[0066] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0067] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0068] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0069] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. An economizer ash hopper anti-clogging device, used to clear blockages in the ash discharge pipe (11) connected to the ash hopper (1) of the economizer (8), characterized in that, The economizer ash hopper anti-clogging device includes: A filter assembly (2) is installed inside the ash discharge pipe (11). The filter assembly (2) is configured to retain large coke particles on the filter assembly (2) and allow small coke particles to be discharged from the ash discharge pipe (11). The crushing component (3) is installed inside the ash discharge pipe (11) and located above the filter component (2). It is used to crush large coke particles that remain on the filter component (2) into small coke particles that can be discharged from the ash discharge pipe (11). An air supply assembly (4) is installed at the inlet of the ash discharge pipe (11) to supply air into the ash discharge pipe (11). The airflow supplied into the ash discharge pipe (11) is used to assist small coke particles to be discharged from the ash discharge pipe (11). The controller is signal-connected to the crushing component (3) and the air supply component (4) and is used to control the start and stop of the crushing component (3) and the air supply component (4); The filter assembly (2) includes: a filter screen (21) and a vibrator (22); The filter screen (21) is disposed inside the ash collection pipe (11), and small coke particles can pass through the filter holes of the filter screen (21); The vibrator (22) is installed inside the ash discharge pipe (11) and located below the filter screen (21) to vibrate the filter screen (21) to assist small coke particles to pass through the filter holes of the filter screen (21); The crushing component (3) includes: a pair of extrusion mechanisms symmetrically arranged in the ash discharge pipe (11) for extruding large coke particles stuck on the filter screen (21) into small coke particles; A pair of extrusion holes are correspondingly provided on the ash discharge pipe (11); Each extrusion mechanism includes: an extrusion plate (31), an extrusion rod (32), and an extrusion driver (33). The extrusion plate (31) is disposed inside the ash discharge pipe (11); The extrusion rod (32) has a movable end and a connecting end. The movable end extends into the ash discharge pipe (11) through the corresponding extrusion through hole and is connected to the extrusion plate (31). The extrusion rod (32) can move along the extension direction of the corresponding extrusion through hole. The extrusion driver (33) is disposed on the outer wall of the ash discharge pipe (11) and is used to drive the extrusion rod (32) to move along the extension direction of the corresponding extrusion through hole; The air delivery assembly (4) includes: a fan and multiple air nozzles (41); Multiple air nozzles (41) are evenly distributed along the circumference of the ash collection pipe (11) on the inner wall of the ash collection pipe (11), and each air nozzle (41) forms a first given angle with the center line of the ash collection pipe (11), and air is delivered into the ash collection pipe (11) through the multiple air nozzles (41); A blower is used to deliver air to each nozzle (41).

2. The economizer ash hopper anti-clogging device according to claim 1, characterized in that, The economizer ash hopper anti-clogging device also includes: multiple temperature detectors (5), which are installed inside the ash discharge pipe (11) and located above the filter assembly (2), for detecting the temperature value of large coke particles stuck on the filter assembly (2) and sending the temperature value to the controller; The controller is used to control the start and stop of the crushing component (3) according to the temperature value.

3. The economizer ash hopper anti-clogging device according to claim 2, characterized in that, The temperature detector (5) is a thermocouple.

4. The economizer ash hopper anti-clogging device according to claim 1, characterized in that, The first given included angle is between 30° and 80°.

5. The economizer ash hopper anti-clogging device according to claim 1, characterized in that, The economizer ash hopper anti-clogging device also includes an ash hopper (6), which is connected to the outlet of the ash discharge pipe (11) and is used to recover small coke particles discharged from the ash discharge pipe (11).

6. The economizer ash hopper anti-clogging device according to claim 5, characterized in that, The economizer ash hopper anti-clogging device also includes an ash conveying pump (7), which is installed at the ash outlet of the ash hopper (6) to pump out small coke particles from the ash hopper (6).

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