Ash and slag removing device for thermal power generation

Abstract

The utility model relates to the technical field of thermal power generation, in particular to an ash removing device for thermal power generation. Comprising a first smoke pipe, one end of the first smoke pipe is fixedly connected with a second smoke pipe, a dust removal filter screen is fixedly arranged in the second smoke pipe and located above the first smoke pipe, the lower end of the second smoke pipe is fixedly connected with a box body, and a vibration screen which is obliquely arranged is installed in the box body. When the conveying belt conveys screened coarse slag in the direction away from fine slag, the reciprocating lead screw rotates to drive the spray head to horizontally reciprocate, the moving spray head evenly sprays water mist to the surface of the coarse slag so as to settle dust mixed in the coarse slag, the reciprocating lead screw drives the fan to rotate in the process, and the dust in the coarse slag is removed. And the fan is matched with the fine filter screen to suck and clean a small amount of dust drifting in the air, so that ash cleaning personnel are prevented from sucking a large amount of dust to damage health.

Description

Technical Field

[0001] This utility model relates to the field of thermal power generation technology, and more specifically, to an ash and slag removal device for thermal power generation. Background Technology

[0002] With the improvement of industrial productivity, people's utilization and development of energy have greatly increased, and the construction of thermal power plants is also increasing. Thermal power plants are factories that use combustibles as fuel to produce electricity. Its basic production process is that when fuel is burned, it heats water to generate steam, which converts the chemical energy of the fuel into heat energy. The steam pressure drives the turbine to rotate, and the heat energy is converted into mechanical energy. Then the turbine drives the generator to rotate, which converts the mechanical energy into electrical energy. The prime mover is usually a steam engine or a gas turbine. In the field of thermal power generation, the flue gas produced during the coal combustion power generation process generally contains ash and slag, which cannot be directly discharged into the air and needs to be filtered and sorted. The ash and slag can be reused in industries such as construction. At present, boiler flue gas treatment devices are generally used in the market to treat the flue gas.

[0003] The utility model with authorization announcement number CN212691803U provides an ash removal device for thermal power generation. This ash removal device can filter and sort the ash from the flue pipe, collect and reuse coarse ash, fine ash and dust, and meet the standards for ash discharge.

[0004] However, in the aforementioned patent, when the device conveys the screened coarse slag and fine slag in opposite directions, the ash slag in the conveying process is directly exposed to the air. The dust mixed in the ash slag will be dispersed into the air due to vibration during the conveying process, forming dust. Cleaning personnel near the device will inhale the dust, which will harm their health. In view of this, we propose an ash slag removal device for thermal power generation. Summary of the Invention

[0005] The purpose of this invention is to provide an ash and slag removal device for thermal power generation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, one objective of this utility model is to provide an ash removal device for thermal power generation, comprising a first flue pipe, a second flue pipe fixedly connected to one end of the first flue pipe, a dust removal filter screen fixedly installed inside the second flue pipe, the dust removal filter screen being located above the first flue pipe, a housing fixedly connected to the lower end of the second flue pipe, an inclined vibrating screen installed inside the housing, a side window opened on one side of the housing, the lower end of the vibrating screen screen extending through the side window to the outside of the housing, a conveyor frame fixedly connected to one side of the housing, and the conveyor frame having a bottom near the bottom A conveyor belt is installed at one end to transport ash and slag away from the box. The vibrating screen extends into the conveyor frame at its lower end and is located directly above the conveyor belt. A movable plate is installed inside the conveyor frame, and a spraying mechanism is installed at the bottom of the movable plate to spray industrial water onto the conveyor belt. A displacement mechanism is installed at the top of the conveyor frame to drive the movable plate to move horizontally. Dust collection mechanisms are installed on both sides of the conveyor frame. When the movable plate moves horizontally, the dust collection mechanisms extract the air from inside the conveyor frame.

[0007] As a further improvement to this technical solution, the spraying mechanism includes a diversion box fixedly installed at the bottom of the movable plate. Several nozzles are fixedly connected in a horizontal array at the bottom of the diversion box, and a water inlet pipe is fixedly connected to the top of the diversion box. The upper end of the water inlet pipe passes through the side wall of the movable plate and extends to the outside of the conveyor frame.

[0008] As a further improvement to this technical solution, two scrapers are fixedly connected to the bottom of the diversion box near both ends. The scrapers slide in contact with the inner sidewall of the conveyor frame. A crossbeam is fixedly connected between the two scrapers near the upper end. Several flipping rods are fixedly connected in a horizontal array on the lower surface of the crossbeam. The lower end of the flipping rods slides in contact with the upper surface of the conveyor belt.

[0009] As a further improvement to this technical solution, a mounting plate is fixedly connected to the side of the conveyor frame away from the box body. The displacement mechanism includes a motor fixedly connected to one side of the mounting plate. A reciprocating screw is coaxially fixedly connected to the output shaft of the motor. The other end of the reciprocating screw is rotatably connected to the side wall of the box body. The movable plate is threadedly connected to the reciprocating screw. Several guide rods are fixedly connected between the mounting plate and the box body. The movable plate is slidably sleeved on the guide rods.

[0010] As a further improvement to this technical solution, several air inlet slots are horizontally arrayed on both sides of the conveyor frame near the top. The dust collection mechanism includes a shield fixedly connected to the side wall of the conveyor frame. The air inlet slots connect the shield and the interior of the conveyor frame. A fine filter screen is fixedly installed inside the shield. Several air inlet slots are located on the side of the fine filter screen near the housing. An outlet is opened at the bottom of the shield. The inner wall of the outlet and the side of the fine filter screen near the housing are located on the same vertical plane. A rotating rod is rotatably installed on the inner wall of the shield. A fan is coaxially fixedly connected to the side wall of the rotating rod. An air outlet slot is opened on the side wall of the shield. The air outlet slot is located on the side of the fan away from the fine filter screen. The fan is located on the side of the fine filter screen away from the housing.

[0011] As a further improvement to this technical solution, a driven wheel is coaxially fixedly connected to the side wall of the rotating rod, and a driving wheel is coaxially fixedly connected to the side wall of the reciprocating screw. A transmission belt is drivingly connected to the driving wheel and the driven wheel. Four through slots are opened on both sides of the conveyor frame, and the transmission belt is located inside the corresponding through slot near the middle section.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This ash removal device for thermal power generation works by using a conveyor belt to transport the screened coarse slag away from the fine slag. This causes the reciprocating screw to rotate, which in turn drives the nozzles to move horizontally back and forth. The moving nozzles spray water mist evenly onto the surface of the coarse slag to settle the dust mixed in with it. During this process, the reciprocating screw drives the fan to rotate, and the fan, together with a fine filter screen, removes and cleans the small amount of dust floating in the air, thus preventing ash removal personnel from inhaling large amounts of dust and harming their health. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0016] Figure 3 This is one of the cross-sectional views of the conveyor frame of this utility model;

[0017] Figure 4 This is a second sectional view of the conveyor frame of this utility model;

[0018] Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. First flue;

[0021] 2. Second flue; 21. Dust collector filter;

[0022] 3. Box body; 31. Vibrating screen;

[0023] 4. Conveyor frame; 41. Air inlet duct;

[0024] 5. Conveyor belt;

[0025] 6. Movable board;

[0026] 7. Spraying mechanism; 71. Diverter box; 72. Sprayer head; 73. Scraper; 74. Flipping rod; 75. Water inlet pipe;

[0027] 8. Displacement mechanism; 81. Motor; 82. Reciprocating lead screw; 83. Guide rod;

[0028] 9. Dust collection mechanism; 91. Dust shield; 92. Fine filter; 93. Outlet; 94. Rotating rod; 95. Fan; 96. Air outlet duct; 97. Driven pulley; 98. Drive pulley; 99. Drive belt. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0030] Please see Figures 1-2 As shown, one of the objectives of this embodiment is to provide an ash removal device for thermal power generation, including a first flue pipe 1, one end of which is fixedly connected to a second flue pipe 2, and the other end of which is connected to a thermal power boiler. A dust removal filter 21 is fixedly installed inside the second flue pipe 2, located above the first flue pipe 1. After the smoke generated by the thermal power boiler enters the interior of the second flue pipe 2 through the first flue pipe 1, the smoke rises due to its higher temperature and lower density than air. The rising smoke is discharged from the second flue pipe 2 after passing through the mesh of the dust removal filter 21. The ash particles in the smoke remain on the lower surface of the dust collector filter 21. When a large amount of ash accumulates on the lower surface of the dust collector filter 21, the ash falls downwards under the action of gravity. The lower end of the second smoke pipe 2 is fixedly connected to a box 3. An inclined vibrating screen 31 is installed inside the box 3. A vibrating motor is fixedly installed on one side of the vibrating screen 31. After the vibrating motor is started, the vibrating screen 31 vibrates at a high frequency, so that the vibrating screen 31 can vibrate and screen the ash that falls on the vibrating screen 31, separating the coarse and fine ash, which facilitates the comprehensive recycling of the ash.

[0031] Meanwhile, a side window is provided on one side of the housing 3. The lower end of the vibrating screen 31 extends through the side window to the outside of the housing 3. After the ash and slag falling from the lower surface of the dust filter 21 lands on the upper surface of the vibrating screen 31, the vibrating screen 31 vibrates and screens the ash and slag. Smaller ash and slag particles fall downward through the mesh of the vibrating screen 31. After a container is placed under the housing 3, the ash and slag particles falling through the mesh of the vibrating screen 31 fall into the container. Larger ash and slag particles slide along the inclined surface of the vibrating screen 31 to the outside of the housing 3. At the same time, a conveyor frame 4 is fixedly connected to one side of the housing 3. A conveyor belt 5 is installed near the bottom of the inside of the conveyor frame 4. The end of the vibrating screen 31 at the lower position extends into the inside of the conveyor frame 4 and is located directly above the conveyor belt 5. After the coarse slag from the discharge box 3 falls onto the upper surface of the conveyor belt 5, the conveyor belt 5 transports the coarse slag away from the box 3 when it is running. After another container is placed below the other end of the conveyor belt 5, the coarse slag is transported by the conveyor belt 5 to the inside of the other container, thereby separating the coarse and fine slag in the ash slag, which facilitates the subsequent sorting and comprehensive utilization of the coarse and fine slag, and improves the utilization efficiency of the ash slag.

[0032] As the conveyor belt 5 transports the coarse slag away from the housing 3, the dust in the slag will be dispersed into the air due to the movement, causing the slag to harm the health of cleaning personnel. To solve this problem, a movable plate 6 is installed inside the conveyor frame 4, and a spraying mechanism 7 is installed at the bottom of the movable plate 6. The spraying mechanism 7 is used to spray industrial water onto the conveyor belt 5. The structure of the spraying mechanism 7 is detailed below, referring to... Figure 3 The spraying mechanism 7 includes a diversion box 71 fixedly installed at the bottom of the movable plate 6. Several nozzles 72 are fixedly connected in a horizontal array at the bottom of the diversion box 71. A water inlet pipe 75 is fixedly connected to the top of the diversion box 71. The upper end of the water inlet pipe 75 passes through the side wall of the movable plate 6 and extends to the outside of the conveyor frame 4. After connecting the water inlet pipe 75 to a water pump, the water pump delivers industrial water to the inside of the diversion box 71 through the water inlet pipe 75. The industrial water is then sprayed out through several nozzles 72 to form a water mist. The water mist covers the coarse slag on the conveyor belt 5, causing the dust on the coarse slag to settle. The moistened dust adheres to the surface of the coarse slag to reduce the amount of dust that is dispersed into the air and prevent personnel from inhaling a large amount of dust that may harm their health.

[0033] The industrial water sprayed from nozzle 72 can only reach the surface of the upper layer of coarse slag, while the surface of the lower layer of coarse slag remains dry. When the coarse slag is removed from the conveyor belt 5, dust from the dry surface of the coarse slag will still be dispersed into the air, endangering personnel health. To solve this problem, a displacement mechanism 8 is installed at the top of the conveyor frame 4. The displacement mechanism 8 is used to drive the movable plate 6 to move horizontally. The structure of the displacement mechanism 8 is detailed below, refer to... Figure 2A mounting plate is fixedly connected to the side of the conveyor frame 4 away from the housing 3. The displacement mechanism 8 includes a motor 81 fixedly connected to one side of the mounting plate. A reciprocating screw 82 is coaxially fixedly connected to the output shaft of the motor 81. The other end of the reciprocating screw 82 is rotatably connected to the side wall of the housing 3. A movable plate 6 is threadedly connected to the reciprocating screw 82. Several guide rods 83 are fixedly connected between the mounting plate and the housing 3. The movable plate 6 is slidably sleeved on the guide rods 83. After the motor 81 starts, its output shaft drives the reciprocating screw 82. Through the threaded connection between the reciprocating screw 82 and the movable plate 6, the movable plate 6 moves horizontally back and forth along the axis of the guide rods 83. The moving movable plate 6 drives the diversion box 71 to move synchronously. Two scrapers 73 are fixedly connected to the bottom of the diversion box 71 near both ends. The scrapers 73 slide against the inner wall of the conveyor frame 4. The two scrapers 73 are fixedly connected to a crossbeam near the upper end. Several turning rods 74 are fixedly connected to the lower surface of the crossbeam in a horizontal array. The lower end of the turning rods 74 slides in contact with the upper surface of the conveyor belt 5. When the diversion box 71 drives the turning rods 74 to move horizontally, the several turning rods 74 turn the coarse slag on the conveyor belt 5, turning the coarse slag located in the lower layer to the upper layer, so that the water mist sprayed by the nozzle 72 evenly wets the coarse slag, so that less dust in the coarse slag is dispersed into the air, further reducing the amount of dust in the air and protecting the health of personnel. When the diversion box 71 drives the two scrapers 73 to move horizontally, the two scrapers 73 scrape off and clean the coarse slag adhering to the inner wall of the conveyor frame 4, avoiding a large amount of wet slag adhering to the inner wall of the conveyor frame 4, reducing the difficulty for workers to clean the inner wall of the conveyor frame 4 laterally.

[0034] After the nozzle 72 sprays water mist to wet the coarse slag, a small amount of dust from the slag will still drift into the air. Over a long period of transporting coarse slag, the amount of dust drifting into the air will accumulate, posing a health hazard to personnel. To further reduce the amount of dust drifting into the air, dust collection mechanisms 9 are installed on both sides of the conveyor frame 4. The structure of the dust collection mechanism 9 is detailed below, referring to... Figure 4 and Figure 5Several air inlet slots 41 are horizontally arrayed on both sides of the conveyor frame 4 near the top. The dust collection mechanism 9 includes a shield 91 fixedly connected to the side wall of the conveyor frame 4. The air inlet slots 41 connect the shield 91 and the interior of the conveyor frame 4. A fine filter 92 is fixedly installed inside the shield 91. Several air inlet slots 41 are located on the side of the fine filter 92 near the housing 3. An outlet 93 is opened at the bottom of the shield 91. The inner wall of the outlet 93 is on the same vertical line as the side of the fine filter 92 near the housing 3. On the plane, a rotating rod 94 is rotatably mounted on the inner wall of the shield 91. A fan 95 is coaxially fixedly connected to the side wall of the rotating rod 94. An air outlet slot 96 is opened on the side wall of the shield 91, located on the side of the fan 95 away from the fine filter 92. The fan 95 is located on the side of the fine filter 92 away from the housing 3. A driven wheel 97 is coaxially fixedly connected to the side wall of the rotating rod 94. A driving wheel 98 is coaxially fixedly connected to the side wall of the reciprocating screw 82. A transmission belt drives the driving wheel 98 and the driven wheel 97. 99. When the reciprocating screw 82 rotates, driving the movable plate 6 to move horizontally back and forth, the reciprocating screw 82 drives the driving wheel 98 to rotate. The driving wheel 98 drives the driven wheel 97 to rotate via the transmission belt 99. The driven wheel 97 drives the rotating rod 94 and the fan 95 to rotate. The diameter of the driving wheel 98 is larger than that of the driven wheel 97, causing the rotating rod 94 and the fan 95 to rotate at high speed. The rotating fan 95 draws the air inside the shield 91 out through the air outlet slot 96, so that the air inside the conveyor frame 4 is continuously replenished through the air inlet slot 41. Inside the shield 91, the ash and slag floating inside the conveyor frame 4 enter the shield 91. The ash and slag entering the shield 91 are filtered by the fine filter screen 92. The fine filter screen 92 blocks the dust on one side. A container is placed below the outlet 93. When a lot of dust accumulates on one side of the fine filter screen 92, the dust falls through the outlet 93 into the container under the action of gravity, realizing the centralized treatment of dust, thereby further reducing the amount of dust in the air and protecting the health of personnel.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ash removal device for thermal power generation, comprising a first flue (1), a second flue (2) fixedly connected to one end of the first flue (1), a dust removal filter (21) fixedly installed inside the second flue (2), the dust removal filter (21) being located above the first flue (1), a housing (3) fixedly connected to the lower end of the second flue (2), a vibrating screen (31) installed at an incline inside the housing (3), a side window being provided on one side of the housing (3), and the lower end of the vibrating screen (31) extending through the side window to the outside of the housing (3), characterized in that: A conveyor frame (4) is fixedly connected to one side of the box (3). A conveyor belt (5) is installed inside the conveyor frame (4) near the bottom. The conveyor belt (5) is used to transport ash and slag away from the box (3). The vibrating screen (31) extends to the inside of the conveyor frame (4) at the lower end and is located directly above the conveyor belt (5). A movable plate (6) is provided inside the conveyor frame (4). A spraying mechanism (7) is provided at the bottom of the movable plate (6). The spraying mechanism (7) is used to spray industrial water onto the conveyor belt (5). A displacement mechanism (8) is provided at the top of the conveyor frame (4). The displacement mechanism (8) is used to drive the movable plate (6) to move horizontally. Dust collection mechanisms (9) are provided on both sides of the conveyor frame (4). When the movable plate (6) moves horizontally, the dust collection mechanism (9) extracts the air inside the conveyor frame (4).

2. The ash removal device for thermal power generation according to claim 1, characterized in that: The spraying mechanism (7) includes a diversion box (71) fixedly installed at the bottom of the movable plate (6). Several nozzles (72) are fixedly connected in a horizontal array at the bottom of the diversion box (71). A water inlet pipe (75) is fixedly connected to the top of the diversion box (71). The upper end of the water inlet pipe (75) passes through the side wall of the movable plate (6) and extends to the outside of the conveyor frame (4).

3. The ash and slag removal device for thermal power generation according to claim 2, characterized in that: Two scrapers (73) are fixedly connected to the bottom of the diversion box (71) near both ends. The scrapers (73) slide in contact with the inner side wall of the conveyor frame (4). A crossbeam is fixedly connected between the two scrapers (73) near the upper end. Several flipping rods (74) are fixedly connected in a horizontal array on the lower surface of the crossbeam. The lower end of the flipping rods (74) slides in contact with the upper surface of the conveyor belt (5).

4. The ash removal device for thermal power generation according to claim 1, characterized in that: The conveyor frame (4) is fixedly connected to a mounting plate on the side away from the box (3). The displacement mechanism (8) includes a motor (81) fixedly connected to one side of the mounting plate. The output shaft of the motor (81) is coaxially fixedly connected to a reciprocating screw (82). The other end of the reciprocating screw (82) is rotatably connected to the side wall of the box (3). The movable plate (6) is threadedly connected to the reciprocating screw (82). Several guide rods (83) are fixedly connected between the mounting plate and the box (3). The movable plate (6) is slidably sleeved on the guide rods (83).

5. The ash and slag removal device for thermal power generation according to claim 4, characterized in that: The conveyor frame (4) has several horizontally arranged air inlets (41) on both sides near the top. The dust collection mechanism (9) includes a shield (91) fixedly connected to the side wall of the conveyor frame (4). The air inlets (41) connect the shield (91) and the interior of the conveyor frame (4). A fine filter (92) is fixedly installed inside the shield (91). Several air inlets (41) are arranged on the side of the fine filter (92) near the housing (3). The bottom of the shield (91) has an opening. The outlet (93) has its inner wall and the fine filter (92) on the same vertical plane as the side of the housing (3). The inner wall of the shield (91) is rotatably provided with a rotating rod (94). A fan (95) is coaxially fixedly connected to the side wall of the rotating rod (94). The side wall of the shield (91) is provided with an air outlet groove (96). The air outlet groove (96) is located on the side of the fan (95) away from the fine filter (92). The fan (95) is located on the side of the fine filter (92) away from the housing (3).

6. The ash and slag removal device for thermal power generation according to claim 5, characterized in that: A driven wheel (97) is coaxially fixedly connected to the side wall of the rotating rod (94), and a driving wheel (98) is coaxially fixedly connected to the side wall of the reciprocating screw (82). A transmission belt (99) is connected to the driving wheel (98) and the driven wheel (97). Four through slots are provided on both sides of the conveyor frame (4), and the transmission belt (99) is located near the middle section inside the corresponding through slot.

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