Crushing type unblocking device for circulating fluidized bed boiler

Abstract

The utility model provides a crushing type unblocking device for a circulating fluidized bed boiler, which relates to the technical field of thermal power boiler circulating fluidized beds and comprises a hearth dense-phase area, a slag falling pipe inclined section, a slag falling pipe vertical section, a slag cooler, a central positioning sleeve, a maintenance cover, a crushing device and a power device. By utilizing the characteristic that the crushing device is small in resistance in the rising process, large slag blocks and large coke blocks blocked in the slag falling pipe can be crushed into small blocks at a time and forcibly discharged out of the pipe, so that the large slag blocks are prevented from being poked back into the furnace again, the problem that the large slag blocks repeatedly block the slag falling pipe is solved, and the service life of the slag falling pipe is prolonged. The slag discharging reliability of the slag falling pipe is greatly improved, meanwhile, a certain distance is kept between the rotary scraper and the inner wall of the slag falling pipe, the inner wall of the slag falling pipe cannot be damaged in the cleaning and maintaining process, the pipeline and cleaning equipment can be easily maintained in the process of cleaning the inner wall of the slag falling pipe through the detachable sealing maintenance cover, and the cleaning efficiency is improved. And the convenience of the cover device is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circulating fluidized bed boiler of thermal power, and particularly relates to a broken type blockage clearing device for circulating fluidized bed boiler. BACKGROUND

[0002] In the operation process of the circulating fluidized bed boiler, inferior coal is often mixed and burned. The inferior coal has large particles and is not easy to be fluidized, and is easy to form large coke blocks or large slag blocks in the combustion process. When the large coke blocks and the large slag blocks are discharged through the slag drop pipe, blockage often occurs at the inlet or the turning part of the slag drop pipe, resulting in that the slag drop pipe cannot smoothly discharge the slag. When the blockage fault occurs, the current method is to manually punch the slag to clear the blockage. In the manual blockage clearing process, the worker inserts a slag-punching tool (usually a steel bar with a diameter of 20-30 mm) into the slag drop pipe from below the inclined section of the slag drop pipe, and punches the slag blocks and coke blocks blocked in the pipe from bottom to top. The slag blocks and coke blocks are often punched back into the furnace. After the large slag blocks and coke blocks are punched back into the furnace, the slag drop pipe is only temporarily unblocked, because the slag blocks and coke blocks will flow into the inlet of the slag drop pipe or the slag drop pipe again after flowing in the furnace for a period of time, causing blockage again. Therefore, the current manual blockage clearing method has the problem of treating the symptoms but not the root cause.

[0003] Therefore, it is of great practical significance to develop a circulating fluidized bed boiler blockage clearing device with a slag block breaking function. SUMMARY

[0004] The present application aims to provide a broken type blockage clearing device for circulating fluidized bed boiler to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a broken type blockage clearing device for circulating fluidized bed boiler, comprising a furnace dense phase zone, a slag drop pipe inclined section, a slag drop pipe vertical section, a slag cooler, a center positioning sleeve, a maintenance cover, a breaking device and a power device, characterized in that: the right side of the furnace dense phase zone is in communication with the left side of the slag drop pipe inclined section, the lower end of the slag drop pipe inclined section is fixedly connected and communicated with the upper end of the slag drop pipe vertical section, the lower end of the slag drop pipe vertical section is fixedly connected and communicated with the inlet of the slag cooler, the lower part of the slag drop pipe inclined section is welded with the center positioning sleeve, the axis of the center positioning sleeve overlaps with the axis of the slag drop pipe inclined section, the lower end of the center positioning sleeve is threadedly connected with the maintenance cover, the upper part of the breaking device penetrates through the maintenance cover and enters the inside of the center positioning sleeve, the axis of the breaking device is parallel to the axis of the center positioning sleeve, and the breaking device is located at the upper part of the center positioning sleeve, the distance between the breaking device and the inner wall of the slag drop pipe inclined section is in the range of 10-30 mm, and the lower end of the breaking device is electrically connected with the power device.

[0006] Preferably, the maintenance cover includes a cover body, a leak-proof layer, and an insert rail. The lower end of the central positioning sleeve is threadedly connected to the cover body. The cover body is fixedly connected to the leak-proof layer. The distance between the leak-proof layer and the inner side of the cover body matches the size of the central positioning sleeve. One end of the inner side of the cover body is fixedly connected to the insert rail. The insert rail is a hollow cylinder with through holes at both ends.

[0007] Preferably, the crushing device includes a pyramidal head, a support shaft, a rotary scraper, a cavity section, and a mechanical rotary telescopic arm. The cone angle of the pyramidal head is 15° to 30°. The wider side of the pyramidal head is fixedly connected to the end face of the cavity section. The support shaft is installed on the cavity section. The rotary scraper is rotatably connected to the support shaft. The rotary scraper can rotate around the support shaft into the groove of the cavity section. The lower part of the cavity section is fixedly connected to the mechanical rotary telescopic arm.

[0008] Preferably, the rotating scraper is V-shaped with a cone angle of 15° to 30°, the width of the rotating scraper is 40mm to 80mm, and when the rotating scraper rotates to an angle perpendicular to the axis of the inclined section of the slag discharge pipe, the vertical distance from the lower end of the rotating scraper to the inner wall of the inclined section of the slag discharge pipe is 15mm to 30mm.

[0009] Preferably, the power unit is an electric hydraulic cylinder / manual power source.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The crushing device described in this invention experiences low resistance during its ascent. When the crushing device is in standby mode, the rotating scraper is suspended due to gravity, such as... Figure 6 As shown; when unblocking is required, under the action of the power unit, the crushing device moves upward to the blockage area. Due to the resistance generated by the slag block on the freely suspended state of the rotating scraper, the rotating scraper rotates counterclockwise around the support shaft. Thus, the rotating scraper rotates to a state parallel to the crushing device, occupying the position of the cavity section, as shown. Figure 5 As shown, the resistance to the crushing device's ascent is greatly reduced at this time, allowing it to smoothly reach the top of the blockage area.

[0012] 2. The crushing device of the present invention can crush large slag or coke blocks blocking the slag discharge pipe into smaller pieces during the descent process and force them out of the pipe. When the slag discharge pipe is blocked by large slag blocks, under the action of the power device, the crushing device moves upward above the blockage area. At this time, the slag blocks no longer obstruct the rotating scraper, so the rotating scraper leaves the cavity section under the action of gravity and is suspended vertically above the blockage area again. Figure 7The power device reverses and the breaking device moves downward. When the rotary scraper contacts the slag blocking area, the rotary scraper will rotate clockwise, but when the rotary scraper rotates to 90° with the axis of the breaking device, the rotary scraper is in close contact with the back of the pyramid head, which limits and supports the rotary scraper, so the rotary scraper can no longer rotate clockwise, and thus the rotary scraper enters and passes through the slag blocking area in a state perpendicular to the axis, as shown in Figure 7 The cutting edge of the rotary scraper forcibly cuts the slag block, and the back of the rotary scraper is wide and uses its V-shaped structure to form strong extrusion on the slag block. Thus, the slag block is broken into small pieces under the cutting action of the cutting edge and the extrusion of the V-shaped body, and is smoothly discharged into the slag cooler through the slag discharge pipe, thereby solving the problems of breaking and discharging large slag blocks in the slag discharge pipe.

[0013] 3. The rotary scraper of the present application will not damage the inner wall of the slag discharge pipe. When the rotary scraper is in a position perpendicular to the axis of the breaking device, the distance between the rotary scraper and the inner wall of the slag discharge pipe is the shortest, as shown in Figure 7 The rotary scraper will not contact the inner wall of the slag discharge pipe, so it will not damage the slag discharge pipe. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present application;

[0015] Figure 2 is a schematic diagram of the maintenance cover structure of the present application;

[0016] Figure 3 is an enlarged schematic diagram of the A point structure of the present application;

[0017] Figure 4 is a schematic diagram of the overall structure of the breaking device of the present application;

[0018] Figure 5 is the working state of the breaking device when it passes through the slag block blocking area;

[0019] Figure 6 is the working state of the breaking device after it passes through the slag block blocking area;

[0020] Figure 7 is the working state of the breaking device when it moves downward (i.e. when it breaks the slag block).

[0021] In the figure: 1, dense phase zone of furnace; 2, inclined section of slag chute; 3, vertical section of slag chute; 4, slag cooler; 5, center positioning sleeve; 6, maintenance cover; 601, cover body; 602, leakage prevention layer; 603, penetrating rail; 7, crushing device; 701, pyramid head; 702, support shaft; 703, rotary scraper; 704, cavity section; 705, mechanical rotary telescopic arm; 8, power device. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0023] Please refer to Figures 1-7 The present application provides a technical solution: a crushing type blockage removing device for a circulating fluidized bed boiler, comprising a dense phase zone of furnace 1, an inclined section of slag chute 2, a vertical section of slag chute 3, a slag cooler 4, a center positioning sleeve 5, a maintenance cover 6, a crushing device 7, and a power device 8. The right side of the dense phase zone of furnace 1 is in communication with the left side of the inclined section of slag chute 2. The lower end of the inclined section of slag chute 2 is fixedly connected and in communication with the upper end of the vertical section of slag chute 3. The lower end of the vertical section of slag chute 3 is fixedly connected and in communication with the inlet of the slag cooler 4. The lower part of the inclined section of slag chute 2 is welded with the center positioning sleeve 5. The axis of the center positioning sleeve 5 overlaps with the axis of the inclined section of slag chute 2. The lower end of the center positioning sleeve 5 is threadedly connected with the maintenance cover 6. The upper part of the crushing device 7 penetrates through the maintenance cover 6 and enters the inside of the center positioning sleeve 5. The axis of the crushing device 7 is parallel to the axis of the center positioning sleeve 5. The crushing device 7 is located at the upper part of the center positioning sleeve 5. The distance between the crushing device 7 and the inner wall of the inclined section of slag chute 2 is in the range of 10-30 mm. The lower end of the crushing device 7 is electrically connected with the power device 8.

[0024] Further, the maintenance cover 6 comprises a cover body 601, a leakage prevention layer 602, and a penetrating rail 603. The lower end of the center positioning sleeve 5 is threadedly connected with the cover body 601. The cover body 601 is fixedly connected with the leakage prevention layer 602. The inner side dimension of the leakage prevention layer 602 from the cover body 601 matches the dimension of the center positioning sleeve 5. The inner side of the cover body 601 is fixedly connected with the penetrating rail 603. The penetrating rail 603 is a hollow cylinder with perforations at both ends, so that the crushing device 7 can perform telescopic movement in the penetrating rail 603, thereby playing a protective and sealing role.

[0025] Further, the breaking device 7 comprises a pyramid head 701, a support shaft 702, a rotary scraper 703, a cavity section 704, and a mechanical rotary telescopic arm 705, the pyramid head 701 has a taper angle of 15°-30°, the wider side of the pyramid head 701 is fixedly connected with the end face of the cavity section 704, the support shaft 702 is installed on the cavity section 704, the support shaft 702 is rotatably connected with the rotary scraper 703, the rotary scraper 703 can rotate into the groove of the cavity section 704 around the support shaft 702, and the lower part of the cavity section 704 is fixedly connected with the mechanical rotary telescopic arm 705.

[0026] Further, the rotary scraper 703 has a "V" shape, the taper angle of the rotary scraper 703 is 15°-30°, the width of the rotary scraper 703 is 40mm-80mm, when the rotary scraper 703 is rotated to the angle perpendicular to the axis of the inclined section 2 of the slag pipe, the vertical distance between the lower end of the rotary scraper 703 and the inner wall of the inclined section 2 of the slag pipe is 15mm-30mm, so that the slag pipe can be conveniently cleaned.

[0027] Further, the power device 8 adopts an electric hydraulic cylinder / human power.

[0028] Working principle: first, the breaking device 7 is rotated until the rotary scraper 703 faces upward, then the pyramid head 701 is inserted into the clogged area of the inclined section 2 of the slag pipe through the penetrating rail 603, then the breaking device 7 is rotated again so that the rotary scraper 703 faces downward, finally, the breaking device 7 is made to perform telescopic motion in the clogged area of the inclined section 2 of the slag pipe by the power device 8, the pyramid head 701 pierces the slag, the rotary scraper 703 cleans the inner wall, and finally the maintenance of the pipe is completed.

[0029] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A crushing type de-clogging device for a circulating fluidized bed boiler, comprising a furnace dense phase zone (1), a slaging pipe inclined section (2), a slaging pipe vertical section (3), a slag cooler (4), a center positioning sleeve (5), a maintenance cover (6), a crushing device (7), a power device (8), characterized in that: The right side of the hearth dense phase zone (1) is communicated with the left side of the slag chute inclined section (2), the lower port of the slag chute inclined section (2) is fixedly connected and communicated with the upper port of the slag chute vertical section (3), the lower port of the slag chute vertical section (3) is fixedly connected and communicated with the inlet of the slag cooler (4), the lower part of the slag chute inclined section (2) is welded with a center positioning sleeve (5), the axis of the center positioning sleeve (5) overlaps with the axis of the slag chute inclined section (2), the lower port of the center positioning sleeve (5) is threadedly connected with a maintenance cover (6), the upper part of the crushing device (7) penetrates through the maintenance cover (6) and into the inside of the center positioning sleeve (5), the axis of the crushing device (7) is parallel to the axis of the center positioning sleeve (5), and the crushing device (7) is located at the upper part of the center positioning sleeve (5), the distance between the crushing device (7) and the inner wall of the slag chute inclined section (2) is in the range of 10-30mm, and the lower end of the crushing device (7) is electrically connected with a power device (8).

2. A crushing type plugging removing device for a circulating fluidized bed boiler according to claim 1, characterized in that, The maintenance cover (6) comprises a cover body (601), a leakage prevention layer (602) and a penetrating rail (603), the lower port of the center positioning sleeve (5) is threadedly connected with the cover body (601), the cover body (601) is fixedly connected with the leakage prevention layer (602), the inner side dimension of the leakage prevention layer (602) from the cover body (601) matches the dimension of the center positioning sleeve (5), one end of the inner side of the cover body (601) is fixedly connected with the penetrating rail (603), and the penetrating rail (603) is a hollow cylinder with perforations at both ends.

3. A break-up plugging device for a circulating fluidized bed boiler according to claim 1, characterized in that The crushing device (7) comprises a pyramid head (701), a support shaft (702), a rotary scraper (703), a cavity section (704) and a mechanical rotary telescopic arm (705), the taper angle of the pyramid head (701) is in the range of 15°-30°, the wider side of the pyramid head (701) is fixedly connected with the end face of the cavity section (704), the support shaft (702) is installed on the cavity section (704), the support shaft (702) is rotatably connected with the rotary scraper (703), the rotary scraper (703) can rotate into the groove of the cavity section (704) around the support shaft (702), and the lower part of the cavity section (704) is fixedly connected with the mechanical rotary telescopic arm (705).

4. A de- agglomerator for use in a circulating fluidized bed boiler according to claim 3, characterized in that The rotary scraper (703) is in the shape of "V" with a taper angle in the range of 15°-30°, the width of the rotary scraper (703) is in the range of 40mm-80mm, when the rotary scraper (703) is rotated to the angle perpendicular to the axis of the slag chute inclined section (2), the vertical distance from the lower end of the rotary scraper (703) to the inner wall of the slag chute inclined section (2) is in the range of 15mm-30mm.

5. A break-up plugging device for a circulating fluidized bed boiler according to claim 3, characterized in that The power device (8) is an electric hydraulic cylinder or a manual device.

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