Coal filter for boiler

Abstract

The utility model provides a coal filter for a boiler, which comprises a filter box, a vibration component is arranged in the filter box, a collection component is arranged at the bottom of the filter box, a servo motor drives a striking cam to rotate through a transmission rod to intermittently strike a support plate, the strike support plate drives a soot filter screen plate to vibrate, and the soot filter screen plate is driven to vibrate. In the process, when a striking cam is separated from a supporting plate, the extrusion force of a reset spring enables a limiting supporting rod to drive the supporting plate to move to the right side to the initial position, so that the soot filtering net plate is cleaned, and the soot filtering net plate is cleaned. And most impurities which are shaken off can fall into a collecting box in a centralized mode through a falling guide through cavity and a connecting shell to be temporarily stored, so that the impurities can be cleaned away in a centralized mode in the later period, and a worker can see the height of the impurities collected in the collecting box only through an observation window.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler coal smoke filtration, in particular to a coal filter for boilers. Background Technique

[0002] A boiler is an energy conversion device. The energy input into the boiler includes the chemical energy in the fuel and electric energy. The boiler outputs steam, high-temperature water or organic heat carriers with a certain amount of heat energy. A coal-fired boiler refers to a boiler that burns coal as fuel. After the heat of the coal is converted, steam or hot water is generated. When a coal-fired boiler is in use, a large amount of coal smoke will be generated. At this time, a corresponding coal smoke filtration structure is required to pre-filter the impurities in the coal smoke discharged from the coal-fired boiler.

[0003] A coal filter for boilers provided by the publication number "CN219571972U" is provided with a filtering structure. When three groups of motors are started, the threaded rod and the rotating rod are driven to rotate. The rotating rod drives the fixed strip to rotate, and the fixed strip drives the cam to rotate. When the cam rotates, it will cooperate with the spring to vibrate the filter screen, and the sundries adhered to the surface of the filter screen can be shaken off, so that the filter screen can maintain a good filtering effect. And when the threaded rod rotates, it drives the threaded sleeve and the push plate to move reciprocally. When the push plate moves, it pushes the cam to move on the fixed strip, and the contact position between the cam and the fixed plate can be continuously adjusted to expand the contact range and slow down the local aging speed of the filter screen, thereby prolonging the service life of the filter screen.

[0004] However, the above technical solution and the existing technologies have the following defects:

[0005] Although the coal filter for boilers can shake off the sundries adhered to the surface of the filter screen and can expand the contact range between the cam and the filter screen, the cam still directly contacts the filter screen when rotating. Therefore, in the actual use process, the filter screen is still easily deformed by the rotating cam, which affects the service life of the filter screen. Secondly, the coal filter for boilers does not have a structure for collecting the shaken-off sundries, resulting in the shaken-off sundries falling back to the inlet again. As the sundries keep falling, it is easy to block the inlet, and the practicability is poor. Content of the Utility Model

[0006] The purpose of the utility model is to provide a coal filter for boilers to solve the problems put forward in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A coal filter for a boiler, comprising a coal-fired boiler, a filter box and a coal smoke filter screen plate. The filter box is installed on the right side of the coal-fired boiler. An inlet pipe is connected between the smoke exhaust end of the coal-fired boiler and the smoke inlet end of the filter box. A coal smoke filter screen plate is installed inside the filter box. A vibration assembly is arranged inside the filter box, and the vibration assembly is used to drive the coal smoke filter screen plate to vibrate. A collection assembly is arranged at the bottom of the filter box, and the collection assembly is used to collect the impurities falling off from the coal smoke filter screen plate.

[0009] Preferably, the vibration assembly includes a striking cam, a transmission rod, a support plate, a rectangular through cavity and a servo motor. A support plate is installed on the right end face of the coal smoke filter screen plate. A rectangular through cavity is formed inside the support plate. A servo motor is installed on the lower end face of the filter box. A transmission rod is installed at the transmission end of the servo motor. Striking cams are arranged on both the upper and lower sides of the circumferential side of the transmission rod.

[0010] Preferably, limiting support rods are symmetrically arranged on both the upper and lower sides of the left end face of the support plate. Positioning side plates are symmetrically and fixedly connected to both the upper and lower sides of the inner wall of the filter box. A limiting cylinder is installed on the right end face of the positioning side plate.

[0011] Preferably, the collection assembly includes a collection box, a connection shell and a guiding through cavity. A guiding through cavity is formed on the lower end face of the filter box. The guiding through cavity is fixedly connected to the lower end of the connection shell. A collection box is sleeved on the outer surface of the connection shell.

[0012] Preferably, an observation window is arranged on the front end face of the collection box. An installation through hole is formed on the upper side of the left end face of the collection box. A fixing screw is installed inside the installation through hole. Disassembly and assembly handles are symmetrically arranged on the left and right end faces of the collection box.

[0013] Preferably, a return spring is installed inside the limiting cylinder. The limiting support rod is in a T shape. An edge sealing strip is embedded at the edge of the support plate. A mechanical seal is installed on the lower side of the circumferential side of the transmission rod.

[0014] Preferably, support legs are symmetrically and fixedly connected to both the left and right sides of the bottom of the filter box. A maintenance plug plate is installed on the front end face of the filter box. A discharge pipe is connected to the outlet at the right end face of the filter box.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. During the use of a coal-fired boiler, the servo motor drives the striking cam to rotate through a transmission rod to intermittently strike the support plate, causing the struck support plate to drive the coal smoke filter plate to vibrate, thereby shaking off some of the impurities blocked by the left end face of the coal smoke filter plate, thus extending the cleaning cycle of the coal smoke filter plate. During this process, when the striking cam separates from the support plate, the extrusion force of the return spring will cause the limit strut to drive the support plate to move to the right to the initial position, so that the striking cam can strike the support plate again. Since the striking cam does not directly contact the coal smoke filter plate, the coal smoke filter plate will not be damaged by the striking of the striking cam, thus ensuring the service life of the coal smoke filter plate;

[0017] 2. During the vibration process of the support plate driving the coal smoke filter plate, most of the shaken-off impurities will fall into the collection box through the guiding cavity and the connecting shell for temporary storage, preventing the shaken-off impurities from blocking the smoke inlet pipe. And the staff can see the height of the impurities collected inside the collection box only through the observation window, so as to judge whether it is necessary to disassemble and clean the collection box, which has good practicability. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 is a structural diagram of the filter box in the present utility model;

[0020] Figure 3 is a front elevation sectional view of the collection component and the vibration component in the present utility model;

[0021] Figure 4 is a partial structural diagram of the vibration component in the present utility model;

[0022] Figure 5 is Figure 3 an enlarged view of A in

[0023] Figure 6 is a structural diagram of the striking cam, the transmission rod and the servo motor in the present utility model;

[0024] Figure 7 is a structural diagram of the collection box in the present utility model.

[0025] In the figure: 1, coal-fired boiler; 2, collection component; 21, collection box; 211, disassembly and assembly handle; 212, installation through hole; 22, fixing screw; 23, connecting shell; 24, guiding and falling through cavity; 25, observation window; 3, filtration box; 31, discharge pipe; 32, support leg; 33, maintenance plug board; 4, vibration component; 41, striking cam; 42, transmission rod; 421, mechanical seal; 43, support plate; 431, edge sealing strip; 44, rectangular through cavity; 45, limiting cylinder; 46, limiting support rod; 47, positioning side plate; 48, return spring; 49, servo motor; 5, smoke inlet pipe; 6, coal smoke filter screen plate. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0027] Please refer to Figure 1-7 , the present invention provides a technical solution:

[0028] Embodiment 1:

[0029] A coal filter for a boiler, including a coal-fired boiler 1, a filtration box 3 and a coal smoke filter screen plate 6. A filtration box 3 is installed on the right side of the coal-fired boiler 1. The filtration box 3 can support the vibration component 4 and the collection component 2. A smoke inlet pipe 5 is connected between the smoke exhaust end of the coal-fired boiler 1 and the smoke inlet end of the filtration box 3. The smoke inlet pipe 5 can guide the coal smoke discharged from the coal-fired boiler 1 into the filtration box 3. A coal smoke filter screen plate 6 is installed inside the filtration box 3. The material of the coal smoke filter screen plate 6 is a heat-resistant glass fiber filter screen. The coal smoke filter screen plate 6 made of a heat-resistant glass fiber filter screen can not only block most of the impurities in the passing coal smoke, but also has good heat resistance and anti-aging ability. The coal smoke filter screen plate 6 is a separately dismountable structure, and the separately dismountable coal smoke filter screen plate 6 is convenient for later replacement.

[0030] Symmetrically and fixedly connected to the left and right sides of the bottom of the filter box 3 are support legs 32. The bottoms of the support legs 32 are fixed to the designated positions on the ground through external expansion bolts. The support legs 32 can support and fix the filter box 3. An inspection plug 33 is installed on the front end face of the filter box 3. The inspection plug 33 is a detachable structure. The detachable inspection plug 33 facilitates the later entry of staff into the interior of the filter box 3 for inspection and maintenance. A discharge pipe 31 is connected to the outlet at the right end face of the filter box 3. The outlet of the discharge pipe 31 is communicated with the inlet of an external heat pipe waste heat recovery device. The discharge pipe 31 can guide the filtered coal smoke into the external heat pipe waste heat recovery device for waste heat recovery. A vibration assembly 4 is arranged inside the filter box 3, and the vibration assembly 4 is used to drive the coal smoke filter plate 6 to vibrate. A collection assembly 2 is arranged at the bottom of the filter box 3, and the collection assembly 2 is used to collect the impurities shaken off from the coal smoke filter plate 6.

[0031] The vibration assembly 4 includes a striking cam 41, a transmission rod 42, a support plate 43, a rectangular through cavity 44, and a servo motor 49. A support plate 43 is installed on the right end face of the coal smoke filter plate 6. The upper, lower, and rear end faces of the support plate 43 are all in contact with the inner wall of the filter box 3. The front end face of the support plate 43 is in contact with the rear end face of the inspection plug 33. The support plate 43 can support the coal smoke filter plate 6. A rectangular through cavity 44 is formed inside the support plate 43. The rectangular through cavity 44 facilitates the filtered coal smoke to pass through the support plate 43. A servo motor 49 is installed on the lower end face of the filter box 3. The servo motor 49 is connected to an external servo motor controller through a wire. The external servo motor controller facilitates the staff to control the servo motor 49 to drive the transmission rod 42 to rotate at the required speed for installation. Since the detailed internal structure and working principle of the servo motor 49 are relatively mature technologies in the prior art, no further elaboration will be made here. A transmission rod 42 is installed at the transmission end of the servo motor 49. The transmission rod 42 is connected to the striking cam 41 by welding. Striking cams 41 are arranged on both the upper and lower sides of the circumferential side of the transmission rod 42. The transmission rod 42 can drive the striking cam 41 to rotate so that the rotating striking cam 41 intermittently strikes the support plate 43 and pushes it to the left.

[0032] On the upper and lower sides of the left end face of the support plate 43, limiting struts 46 are symmetrically arranged. The limiting struts 46 are connected to the support plate 43 by welding. The limiting struts 46 are in a T shape. The limiting struts 46 in the T shape can not only limit the support plate 43, but also will not slip off during the left and right telescopic movement. On the upper and lower sides of the inner wall of the filter box 3, positioning side plates 47 are symmetrically and fixedly connected. The positioning side plates 47 can support the limiting cylinder 45. The right end face of the positioning side plate 47 is provided with a limiting cylinder 45. The limiting cylinder 45 is a detachable structure. The limiting cylinder 45 can limit and guide the limiting strut 46. A return spring 48 is installed inside the limiting cylinder 45. The return spring 48 is made of a high-temperature resistant spring. The return spring 48 not only enables the limiting strut 46 to have the ability of left and right telescoping, but also has high-temperature resistance. An edge sealing strip 431 is embedded at the edge of the support plate 43. The edge sealing strip 431 is made of high-temperature resistant packing. The edge sealing strip 431 made of high-temperature resistant packing not only further improves the sealing performance at the edge of the support plate 43, but also has good heat resistance and service life. A mechanical seal 421 is installed on the lower side of the circumferential side of the transmission rod 42. The mechanical seal 421 makes the sealing performance between the transmission rod 42 and the filter box 3 better.

[0033] Embodiment 2:

[0034] On the basis of Embodiment 1, in this embodiment, during the process that the support plate 43 drives the coal smoke filter screen plate 6 to vibrate, most of the impurities shaken off will pass through the guiding cavity 24 and the connecting shell 23 and fall into the collection box 21 for temporary storage, avoiding the impurities shaken off from blocking the smoke inlet pipe 5. And the staff can see the height of the impurities collected inside the collection box 21 only through the observation window 25, so as to facilitate the staff to judge whether it is necessary to disassemble and clean the collection box 21.

[0035] The collection component 2 includes a collection box 21, a connection shell 23, and a guiding and dropping cavity 24. A guiding and dropping cavity 24 is provided on the lower end face of the filter box 3. The guiding and dropping cavity 24 can centrally guide the impurities shaken off from the left end face of the soot filter plate 6 downward into the connection shell 23. The lower end of the guiding and dropping cavity 24 is fixedly connected to the connection shell 23. The connection shell 23 can support the collection box 21. The collection box 21 is sleeved on the outer surface of the connection shell 23. The collection box 21 can centrally collect the dropped impurities. An observation window 25 is provided on the front end face of the collection box 21. The material of the observation window 25 is heat-resistant observation window 25 glass. The observation window 25 made of heat-resistant observation window 25 glass not only facilitates the staff to observe the internal situation of the collection box 21 in real time, but also has good heat resistance. An installation through hole 212 is provided on the upper side of the left end face of the collection box 21. A fixing screw 22 is installed inside the installation through hole 212. The installation through hole 212 and the fixing screw 22 facilitate the staff to install and fix the collection box 21 on the outer surface of the connection shell 23. Disassembly and assembly handles 211 are symmetrically arranged on the left and right end faces of the collection box 21. The disassembly and assembly handles 211 facilitate the staff to manually take the collection box 21.

[0036] Working principle: During the use of the coal-fired boiler 1, the smoke inlet pipe 5 can guide the coal smoke discharged from the coal-fired boiler 1 into the filter box 3. Then, the coal smoke entering the interior of the filter box 3 will be filtered by the coal smoke filter screen plate 6, blocking most of the impurities in the coal smoke. The filtered coal smoke will enter the external heat pipe waste heat recovery device through the discharge pipe 31 for waste heat recovery. At the same time, the servo motor 49 is driven to rotate and work as required through the external servo motor controller, so that the servo motor 49 drives the striking cam 41 to rotate through the transmission rod 42. During this process, the rotating striking cam 41 will intermittently strike the support plate 43 and push it to the left by a certain distance, causing the struck support plate 43 to drive the coal smoke filter screen plate 6 to vibrate, thereby shaking off some of the impurities blocked on the left end face of the coal smoke filter screen plate 6, so as to extend the cleaning cycle of the coal smoke filter screen plate 6. And when the striking cam 41 separates from the support plate 43, under the extrusion force of the return spring 48, the limit strut 46 will drive the support plate 43 to move to the right to the initial position, so that the striking cam 41 can strike the support plate 43 again; during the vibration process of the support plate 43 driving the coal smoke filter screen plate 6, most of the shaken-off impurities will fall into the collection box 21 through the guide cavity 24 and the connecting shell 23 for temporary storage. And the staff can see the height of the impurities collected inside the collection box 21 only through the observation window 25. When it is necessary to clean the impurities inside the collection box 21, the staff first stops the operation of the coal-fired boiler 1, and then uses an external wrench to disassemble the fixing screw 22. At this time, the collection box 21 can be pulled down and disassembled to pour out the impurities inside the collection box 21 for cleaning. During the later use process, the staff only needs to disassemble the maintenance plug plate 33, and then can clean or disassemble and replace the coal smoke filter screen plate 6 inside the filter box 3.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal filter for a boiler, comprising a coal-fired boiler (1), a filter box (3) and a soot filter screen (6), characterized in that: A filter box (3) is installed on the right side of the coal-fired boiler (1); a smoke inlet pipe (5) is connected between the smoke exhaust end of the coal-fired boiler (1) and the smoke inlet end of the filter box (3); a soot filter screen (6) is installed inside the filter box (3); a vibration component (4) is arranged inside the filter box (3), and the vibration component (4) is used to drive the soot filter screen (6) to vibrate; a collection component (2) is arranged at the bottom of the filter box (3), and the collection component (2) is used to collect impurities shaken off from the soot filter screen (6).

2. A coal filter for a boiler according to claim 1, characterized in that: The vibration assembly (4) comprises a striking cam (41), a transmission rod (42), a support plate (43), a rectangular through cavity (44) and a servo motor (49); the right end surface of the soot filter plate (6) is provided with a support plate (43); a rectangular through cavity (44) is provided inside the support plate (43); the lower end surface of the filter box (3) is provided with a servo motor (49); a transmission rod (42) is provided at the transmission end of the servo motor (49); and striking cams (41) are provided on both upper and lower sides of the annular side surface of the transmission rod (42).

3. A coal filter for a boiler according to claim 2, characterized in that: The left end surface of the support plate (43) is symmetrically provided with limiting support rods (46) on both sides, and the inner wall of the filter box (3) is symmetrically fixedly connected with positioning side plates (47) on both sides. The right end surface of the positioning side plate (47) is equipped with a limiting cylinder (45).

4. A coal filter for a boiler according to claim 1, characterized in that: The collecting assembly (2) comprises a collecting box (21), a connecting shell (23) and a guide cavity (24); the lower end surface of the filter box (3) is provided with a guide cavity (24); the lower end of the guide cavity (24) is fixedly connected to the connecting shell (23); and the outer surface of the connecting shell (23) is sleeved with the collecting box (21).

5. A coal filter for a boiler according to claim 4, characterized in that: The front end surface of the collection box (21) is provided with an observation window (25), the upper side of the left end surface of the collection box (21) is provided with a mounting through hole (212), a fixing screw (22) is installed inside the mounting through hole (212), and the left and right end surfaces of the collection box (21) are symmetrically provided with disassembly handles (211).

6. A coal filter for a boiler according to claim 3, characterized in that: A return spring (48) is installed inside the limiting cylinder (45), the limiting support rod (46) is T-shaped, an edge sealing strip (431) is embedded at the edge of the support plate (43), and a mechanical seal (421) is installed on the lower side of the annular side of the transmission rod (42).

7. A coal filter for a boiler according to claim 1, characterized in that: Support legs (32) are symmetrically fixedly connected to the left and right sides of the bottom of the filter box (3), a maintenance plugging plate (33) is installed on the front end surface of the filter box (3), and a discharge pipe (31) is connected to the outlet of the right end surface of the filter box (3).

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