Improved structure of boiler slag dryer

Abstract

The utility model relates to an improved structure of a boiler slag dryer, which comprises a box body, the box body is provided with a feed port and a discharge port, a conveying roller is arranged in the box body, and a charging basket for storing coal ash slag is arranged on the conveying roller; the improved structure comprises a scraping plate which is arranged in the box body and is used for scraping coal ash slag in the charging basket, and a blocking structure which is used for blocking a gap between the charging basket and the discharge hole; one end, which is in contact with the coal ash slag, of the scraping plate is sawtooth-shaped; the power device and the guide device are used for driving the scraping plate to do reciprocating motion; the guide device comprises a guide rail, a sliding block and a connecting rod; the power device comprises a lead screw, a nut and an adjustable-speed motor; the blocking structure comprises a lower sealing plate abutting against the bottom face of the charging basket and an upper sealing plate abutting against the top face of the charging basket. The utility model has the beneficial effects that coal ash slag is scraped flat by the scraper plate, so that the discharge hole is convenient to seal; and air leakage is avoided through the upper sealing plate and the lower sealing plate.

Description

Technical Field

[0001] The utility model relates to the technical field of dry slag conveyors, in particular to an improved structure of a boiler dry slag conveyor. Background Art

[0002] With the transformation of the global energy structure and the improvement of environmental protection requirements, coal-fired power generation, as a traditional energy supply method, is facing huge challenges. During the operation of a power station boiler, air leakage in the dry slag conveyor is a common problem. This is mainly due to various factors such as the furnace structure, fuel treatment, and operation mode. Through observation and analysis, the reason for the air leakage in the dry slag conveyor is that the coal ash and slag in the material basket are uneven, and the baffle plate set at the discharge port is often pushed open, resulting in air leakage.

[0003] Air leakage in the dry slag conveyor will cause a large amount of cold air to enter the furnace, resulting in a decrease in the furnace temperature and a rapid increase in the flue gas temperature, thereby increasing heat loss and reducing the thermal efficiency of the boiler; if the air leakage problem is serious and not adjusted in time, it may also lead to boiler flameout, threatening the operation of the once-through boiler and the production of the entire power plant. Therefore, studying the reduction of air leakage in the dry slag conveyor of a power station boiler is of great significance for improving the operation efficiency and safe operation of the unit. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an improved structure of a boiler dry slag conveyor, which levels the coal ash and slag by setting a scraper and seals the discharge port of the dry slag conveyor to avoid air leakage.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] The boiler dry slag conveyor includes a box body, the box body is provided with a feed inlet and a discharge port, a conveying roller is arranged in the box body, and a material basket for storing coal ash and slag is arranged on the conveying roller; the feed inlet is used for inputting hot coal ash and slag, and the discharge port is used for outputting the cooled coal ash and slag;

[0007] An improved structure of a boiler dry slag conveyor includes a scraper arranged in the box body and used for leveling the coal ash and slag in the material basket, and a sealing structure for sealing the gap between the material basket and the discharge port; one end of the scraper in contact with the coal ash and slag is set to be serrated.

[0008] Furthermore, it also includes a power device and a guiding device for driving the scraper to reciprocate.

[0009] Furthermore, the guiding device includes a guide rail fixedly connected to the top inside the box body, a slider slidably connected to the guide rail, and a connecting rod fixedly connected to the slider; the connecting rod is fixedly connected to the scraper; the length direction of the scraper is consistent with the conveying direction of the material basket; the moving direction of the scraper is perpendicular to the conveying direction of the material basket.

[0010] Furthermore, the length of the scraping plate is not less than the width of two of the material baskets.

[0011] Furthermore, the guide rail is a T-shaped guide rail; the slider is provided with a T-shaped groove; the T-shaped groove is adapted to the T-shaped guide rail.

[0012] Furthermore, the power device includes a lead screw rotatably connected to the box body and a nut threadedly connected to the lead screw; a support is fixedly connected inside the box body; both ends of the lead screw are rotatably connected to the support through bearings; the nut is fixedly connected to the slider.

[0013] Furthermore, the sealing structure includes a lower sealing plate abutting against the bottom surface of the material basket and an upper sealing plate abutting against the top surface of the material basket; the lower sealing plate is located below the discharge port, and the bottom edge of the lower sealing plate is hinged to the box body; the top edge of the lower sealing plate is connected to the box body through a spring; the upper sealing plate is an elastic rubber plate; the upper part of the upper sealing plate is fixedly connected to the box body, and magnets are inlaid on both sides of the upper sealing plate in contact with the box body.

[0014] The beneficial effects of the present utility model are:

[0015] The coal ash slag is scraped flat by the provided scraping plate, which facilitates the sealing of the discharge port; the bottom of the scraping plate is tooth-shaped, which can reduce the resistance during scraping and facilitate quick scraping flat.

[0016] The magnets on the provided upper sealing plate can fit with the edge of the discharge port, which facilitates sealing; the provided lower sealing plate facilitates sealing the lower half of the discharge port when the material basket is not transported to the discharge port, avoiding air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic diagram of the upper sealing plate and the lower sealing plate installed on the discharge port;

[0019] Figure 3 is a schematic diagram when the lower sealing plate is closed;

[0020] Figure 4 is a schematic diagram when the lower sealing plate is opened;

[0021] Figure 5 is a schematic installation structure diagram of the upper sealing plate and the magnet;

[0022] Figure 6 is a schematic structural diagram of the scraping plate;

[0023] Figure 7 is a schematic connection diagram of the scraping plate and the connecting rod.

[0024] The reference numerals in the drawings,

[0025] 1 - Box body, 2 - Material frame, 3 - Coal ash slag, 4 - Nut, 5 - Lead screw, 6 - Guide rail, 7 - Slide block, 8 - Scraper, 81 - Saw teeth, 82 - Reinforcing rib, 9 - Lower sealing plate, 10 - Upper sealing plate, 91 - Spring, 11 - Magnet. Detailed implementation mode

[0026] The following will combine the drawings in the embodiments of the present invention; the technical solutions in the embodiments of the present invention will be clearly and completely described; the described embodiments are only a part of the embodiments of the present invention; rather than all embodiments. Based on the embodiments of the present invention; all other embodiments obtained by those of ordinary skill in the art without creative work; fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] As Figure 1 shown in

[0029] The boiler dry slag machine includes a box body 1, the box body 1 is provided with a feed inlet and a discharge outlet, and a conveying roller is arranged in the box body 1, and a material basket 2 for storing coal ash slag 3 is arranged on the conveying roller; Figure 1 The arrow in

[0030] An improved structure of a boiler dry slag machine includes a scraper 8 arranged in the box body 1 and used for leveling the coal ash slag 3 in the material basket 2, and a sealing structure for blocking the gap between the material basket 2 and the discharge outlet;

[0031] It also includes a power device and a guiding device for driving the scraper 8 to reciprocate along the top of the material frame 2.

[0032] The guiding device includes a guide rail 6 fixedly connected to the top inside the box body 1, a slide block 7 slidably connected to the guide rail 6, and a connecting rod fixedly connected to the slide block 7; the connecting rod is fixedly connected to the scraper 8; the length direction of the scraper 8 is the same as the conveying direction of the material basket 2; the moving direction of the scraper 8 is perpendicular to the conveying direction of the material basket 2.

[0033] The length of the scraper 8 is not less than the width of two material baskets 2. The longer the scraper 8 is, the larger the scraping area is, and it is easier to level the coal ash slag 3. The material frame 2 is vertically conveyed forward along the conveying roller, and the scraper 8 scrapes horizontally. The speed of the scraper 8 is v, and the conveying speed of the material frame 2 is v1; the length of the material frame 2 is S1, the width of the material frame 2 is S; the length of the scraper 8 is 2S; the time taken for the material frame 2 to pass through the length of the scraper 8 is t = 2S / v1; the time taken for the scraper 8 to run along the length of the material frame 2 once is t1 = S / v; in order to prevent missed scraping, t1 should be less than t; that is, the time for the scraper 8 to scrape once should be less than the time for a material frame 2 to pass through the length of a scraper 8.

[0034] The guide rail 6 is a T-shaped guide rail; a T-shaped groove is provided on the slider 7; the T-shaped groove is adapted to the T-shaped guide rail.

[0035] The power device includes a lead screw 5 rotatably connected to the box body 1 and a nut 4 threadedly connected to the lead screw 5; a support is fixedly connected inside the box body 1; both ends of the lead screw 5 are rotatably connected to the support through bearings; the nut 4 is fixedly connected to the slider 7. One end of the lead screw 5 is provided with a speed regulating motor (which belongs to common knowledge); the rotational speed of the lead screw 5 can be adjusted according to the speed at which the conveying roller conveys the material box 2, and then the speed of the scraping plate 8 can be adjusted to match it, avoiding missed scraping.

[0036] As Figures 2 - 5 shown, the plugging structure includes a lower sealing plate 9 abutting against the bottom surface of the material basket 2 and an upper sealing plate 10 abutting against the top surface of the material basket 2; the lower sealing plate 9 is located below the discharge port, the bottom edge of the lower sealing plate 9 is hinged to the box body 1; the top edge of the lower sealing plate 9 is connected to the box body 1 through a spring 91; the upper sealing plate 10 is an elastic rubber plate; the upper part of the upper sealing plate 10 is fixedly connected to the box body 1, and magnets 11 are inlaid on both sides of the surface of the upper sealing plate 10 in contact with the box body 1; the bottom surface of the upper sealing plate 10 abuts against the top surface of the material box 2.

[0037] The working process of the present utility model

[0038] As Figure 2 shown, when the material box 2 is filled with coal ash slag 3 and is conveyed by the conveying roller, there is no material box 2 passing through the discharge port part. The lower sealing plate 9 is tightened by the spring 91 and pressed against the lower half of the discharge port, and the upper sealing plate 10 is adsorbed by the magnet 11 on the upper half of the discharge port, plugging the discharge port to avoid air leakage;

[0039] When the material box 2 passes by the scraping plate 8, the speed regulating motor is started. The speed regulating motor drives the lead screw 5 to rotate. The lead screw 5 drives the nut 4 to move linearly along the lead screw 5. The nut 4 drives the slider 7 to move linearly along the guide rail 6. The scraping plate 8 levels the coal ash slag 3 under the drive of the slider 7; Limit blocks (which belong to common knowledge and are not shown in the figure) are provided at both ends of the guide rail 6. When the slider 7 approaches the limit block, the speed regulating motor reverses, so that the scraping plate 8 reciprocates to level the coal ash slag 3.

[0040] When the coal ash slag 3 in the material box 2 cools down, the material box 2 is conveyed out from the discharge port. At this time, the material box 2 pushes open the lower sealing plate 9, as Figure 3 ; the spring 91 extends; at the same time, the material box 2 pushes open the upper sealing plate 10. Since the upper sealing plate 10 is an elastic rubber plate, when the upper part of the material box 2 abuts against the upper sealing plate 10, the magnets 11 on both sides of the upper sealing plate 10 are disengaged from the box body 1, and the upper sealing plate 10 can seal the gap between the material box 2 and the discharge port better, reducing air leakage.

[0041] Embodiment 2

[0042] This embodiment has basically the same structure as Embodiment 1.

[0043] The difference between this embodiment and Embodiment 1 is that

[0044] In order to prevent excessive force when a single scraper 8 levels the material, two sets of scrapers and drive devices can be arranged front and back. Looking from the incoming material direction, the bottom end of the first scraper 8 is higher than the bottom end of the second scraper 8, and the bottom end of the second scraper 8 abuts against the top of the material frame 2. In this way, when the coal ash slag 3 in the material frame 2 is locally too high, it can be leveled in two times, reducing the force on the scraper 8 and avoiding premature damage to the scraper 8.

[0045] Embodiment 3

[0046] This embodiment has basically the same structure as Embodiment 1.

[0047] The difference between this embodiment and Embodiment 1 is that

[0048] As Figure 6 shown, at one end of the scraper 8 in contact with the coal ash slag 3, sawteeth 81 are provided. The serrated scraper 8 can reduce resistance when scraping the coal ash slag 3 and level it as soon as possible.

[0049] Embodiment 3

[0050] This embodiment has basically the same structure as Embodiment 1.

[0051] The difference is that

[0052] As Figure 7 shown, in order to increase the connection strength between the connecting rod and the scraper 8, a reinforcing rib 82 is provided between the connecting rod and the scraper 8 to avoid breakage between the scraper 8 and the connecting rod.

[0053] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto; any person skilled in the art within the technical scope disclosed by the present invention; according to the technical solution of the present invention and its improved concept, equivalent substitution or change; should be covered within the protection scope of the present invention.

[0054] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

Claims

1. An improved structure of a boiler slag dryer, the boiler slag dryer comprising a box (1), the box (1) being provided with a feed inlet and a discharge outlet, a conveying roller being provided inside the box (1), and a material basket (2) for storing coal ash (3) being provided on the conveying roller; characterized in that: It comprises a scraper (8) arranged in a box body (1) and used for scraping coal ash (3) in a material basket (2), and a blocking structure for blocking a gap between the material basket (2) and a material outlet; the end of the scraper (8) in contact with the coal ash (3) is configured to be sawtooth-shaped.

2. The improved structure of a boiler slag dryer according to claim 1 is characterized in that: It also includes a power device and a guide device for driving the scraper (8) to reciprocate.

3. The improved structure of a boiler slag dryer according to claim 2, characterized in that: The guiding device comprises a guide rail (6) fixedly connected to the top of the box body (1), a slider (7) slidably connected to the guide rail (6), and a connecting rod fixedly connected to the slider (7); the connecting rod is fixedly connected to the scraper (8); the length direction of the scraper (8) is consistent with the conveying direction of the material basket (2); the movement direction of the scraper (8) is perpendicular to the conveying direction of the material basket (2).

4. The improved structure of a boiler slag dryer according to claim 3 is characterized in that: The length of the scraper (8) is not less than the width of the two material baskets (2).

5. The improved structure of a boiler slag dryer according to claim 3 is characterized in that: The guide rail (6) is a T-shaped guide rail; the slider (7) is provided with a T-shaped groove; the T-shaped groove is adapted to the T-shaped guide rail.

6. The improved structure of a boiler slag dryer according to claim 3, characterized in that: The power device comprises a lead screw (5) rotatably connected to the housing (1) and a nut (4) threadedly connected to the lead screw (5); a support is fixedly connected to the housing; both ends of the lead screw (5) are rotatably connected to the support via bearings; and the nut (4) is fixedly connected to the slider (7).

7. The improved structure of a boiler slag dryer according to claim 1, characterized in that: The blocking structure comprises a lower sealing plate (9) abutting against the bottom surface of the material basket (2) and an upper sealing plate (10) abutting against the top surface of the material basket (2); the lower sealing plate (9) is located below the discharge port, and the bottom edge of the lower sealing plate (9) is hinged to the box body (1); the top edge of the lower sealing plate (9) is connected to the box body (1) via a spring (91); the upper sealing plate (10) is an elastic rubber plate; the upper part of the upper sealing plate (10) is fixedly connected to the box body (1), and magnets (11) are inlaid on both sides of the upper sealing plate (10) that are in contact with the box body (1).

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