Dry-type slag extractor for thermal power generating unit

Abstract

The invention relates to a dry type slag extractor for a thermal power generating unit, which comprises a box body provided with a slag inlet and a slag outlet; the slag discharging mechanism is arranged in the box body and comprises a conveying belt and at least two first driving rollers in transmission connection with the conveying belt, and the two first driving rollers are arranged in the slag conveying direction in a spaced mode and located at the two ends of the conveying belt correspondingly; the first end of the conveying belt is located below the slag inlet, the second end of the conveying belt is located above the slag outlet, and the driving mechanism is arranged on the box body and is in transmission connection with the two first driving rollers. Therefore, the conveying belt can be driven through at least two power sources, the conveying capacity of the conveying belt is improved, that is, the two first driving rollers can be selectively started to work at the same time according to the specific conveying working condition, and therefore the conveying capacity of the conveying belt can be improved; the problem of shutdown caused by insufficient transport capacity of the slag extractor when the boiler is in high load is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of slag discharge of thermal power, and in particular to a dry slag discharger for a thermal power unit. Background Art

[0002] When the boiler of a thermal power unit is under high load, coal consumption increases and the amount of slag discharge increases sharply. The driving drum of the dry slag discharger in the related technology has limited power, which causes the steel belt of the slag discharger to overload, resulting in shutdown. Summary of the invention

[0003] The purpose of the present disclosure is to provide a dry slag discharger for a thermal power unit, which can have sufficient driving force to adapt to the requirements of multiple slag discharge conditions, so as to at least partially solve the problems in the related art.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a dry slag discharger for a thermal power unit, comprising: a box body, the box body is provided with a slag inlet and a slag outlet; a slag discharge mechanism, which is arranged in the box body, and the slag discharge mechanism includes a conveyor belt and at least two first drive rollers connected to the conveyor belt in a transmission manner, wherein the two first drive rollers are arranged at intervals along the slag feeding direction and are respectively located at two ends of the conveyor belt, the first end of the conveyor belt is located below the slag inlet, and the second end is located above the slag outlet, and the drive mechanism is arranged in the box body and is respectively connected to the two first drive rollers in a transmission manner.

[0005] Optionally, the driving mechanism includes a first driving component and a second driving component which are independently arranged, the first driving component is used to drive the first driving roller located at the first end of the conveyor belt, and the second driving component is used to drive the first driving roller located at the second end of the conveyor belt.

[0006] Optionally, the first drive assembly includes a first motor, a primary reducer, a secondary reducer and an output shaft, wherein the output end of the first motor is transmission connected to the input end of the primary reducer, the output end of the primary reducer is transmission connected to the input end of the secondary reducer through a first transmission chain, the output end of the secondary reducer is transmission connected to the input end of the output shaft through a second transmission chain, and the output end of the output shaft is used to drive the first drive roller located at the first end of the conveyor belt.

[0007] Optionally, the number of the first driving rollers is three, wherein the three first driving rollers are arranged at intervals along the slag conveying direction and are all drivingly connected to the conveyor belt.

[0008] Optionally, the dry slag discharger for thermal power units also includes a cleaning mechanism, which is located below the conveyor belt. The cleaning mechanism includes a cleaning chain, a plurality of scrapers arranged on the cleaning chain, and a second driving roller and a driven roller arranged at both ends of the cleaning chain. The scraper is used to clean the conveyor belt as the cleaning chain moves.

[0009] Optionally, the conveyor belt includes a first horizontal section and a first climbing section, the cleaning chain includes a second horizontal section and a second climbing section, the scraper is arranged on the second horizontal section, the outer end of the first horizontal section and the outer end of the second horizontal section are both located below the slag inlet, and the outer end of the first climbing section and the outer end of the second climbing section are both located above the slag outlet.

[0010] Optionally, the dry slag discharger for thermal power units further comprises two guide rollers, which are rotatably arranged on opposite sides of the conveyor belt in the width direction, and the guide rollers are respectively in contact with two side edges of the conveyor belt.

[0011] Optionally, the dry slag discharger for thermal power units further comprises a plurality of supporting rollers and a plurality of pressure rollers, wherein the plurality of supporting rollers are rotatably disposed below the conveyor belt, and the plurality of supporting rollers abut against the bottom surface of the conveyor belt; the plurality of pressure rollers are rotatably disposed above the conveyor belt, and the plurality of pressure rollers abut against the top surface of the conveyor belt.

[0012] Optionally, the dry slag discharger for thermal power units also includes a humidifying structure, which is arranged in a box body and located above the first climbing section of the conveyor belt. The humidifying structure includes a water pipe and a water outlet pipe arranged on the water pipe and facing the conveyor belt.

[0013] Optionally, the dry slag discharger for a thermal power unit further includes a controller and a sensor, wherein the sensor is arranged on the conveyor belt, and the sensor and the driving mechanism are respectively connected to the controller signal.

[0014] Through the above technical scheme, through the slag discharge mechanism arranged in the box body, at least two first driving rollers in the slag discharge mechanism are respectively arranged at both ends of the conveyor belt, the first end of the conveyor belt is located below the slag inlet, and the second end is located above the slag outlet. At the same time, the first driving roller is driven to rotate by the driving mechanism, so that the conveyor belt can be driven by at least two power sources to improve the transportation capacity of the conveyor belt, that is, according to the specific transportation conditions, the two first driving rollers can be selectively started to work at the same time, so as to improve the transportation capacity of the conveyor belt and solve the shutdown problem caused by insufficient transportation capacity of the slag discharger when the boiler is under high load.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a dry slag discharge machine provided in an exemplary embodiment of the present disclosure; Figure 2 is a schematic diagram of a first driving assembly provided in an exemplary embodiment of the present disclosure.

[0017] Description of Reference Numerals 1-box; 11-slag inlet; 12-slag outlet; 2-slag discharge mechanism; 21-first drive roller; 22-conveyor belt; 221-first horizontal section; 222-first climbing section; 3-driving mechanism; 31-first driving assembly; 311-first motor; 312-first reducer; 313-second reducer; 314-output shaft; 315-first transmission chain; 316-second transmission chain; 32-second driving assembly; 4-cleaning mechanism; 41-cleaning chain; 411-second horizontal section; 412-second climbing section; 42-second drive roller; 43-driven roller; 5-guide roller; 6-support roller; 7-pressure roller; 8-humidifying structure. DETAILED DESCRIPTION

[0018] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0019] In the present disclosure, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the use state of the slag discharger. Figure 1 The paper direction in the drawing. "Inside" and "outside" refer to the outline of the component itself. In addition, it should be noted that the terms used, such as "first" and "second", are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0020] In the related art, when the boiler of a thermal power unit is under high load, coal consumption increases and the amount of slag discharge increases sharply. The existing dry slag discharger usually includes an active roller driving a steel belt and a driven roller operating passively. The slag discharger mainly relies on the friction between the active roller and the steel belt to drive the steel belt of the slag discharger to transport the coal slag. With the high load operation of the thermal power unit and the large changes in coal quality, the amount of slag increases, which makes the single active roller driving the steel belt suffer from the problem of steel belt overload, leading to shutdown.

[0021] In order to solve the above technical problems, Figure 1 and Figure 2 As shown, the present disclosure provides a dry slag discharger for a thermal power unit, comprising: a box body 1, a slag discharge mechanism 2 and a driving mechanism 3, wherein the box body 1 is provided with a slag inlet 11 and a slag outlet 12; the slag discharge mechanism 2 is arranged in the box body 1, and the slag discharge mechanism 2 comprises a conveyor belt 22 and at least two first driving rollers 21 which are transmission-connected to the conveyor belt 22, wherein the two first driving rollers 21 are arranged at intervals along the slag feeding direction and are respectively located at two ends of the conveyor belt 22, the first end of the conveyor belt 22 is located below the slag inlet 11, and the second end is located above the slag outlet 12, and the driving mechanism 3 is arranged in the box body 1, and is transmission-connected to the two first driving rollers 21 respectively.

[0022] Through the above technical scheme, a slag discharge mechanism 2 is arranged in the box body 1, and at least two first driving rollers 21 in the slag discharge mechanism 2 are respectively arranged at both ends of the conveyor belt 22. The first end of the conveyor belt 22 is located below the slag inlet 11, and the second end is located above the slag outlet 12. At the same time, the first driving roller 21 is driven to rotate by the driving mechanism 3, so that the conveyor belt 22 can be driven by at least two power sources to improve the transportation capacity of the conveyor belt 22. That is, according to the specific transportation conditions, the two first driving rollers 21 can be selectively started to work at the same time, so as to improve the transportation capacity of the conveyor belt 22, so as to solve the shutdown problem caused by insufficient transportation capacity of the slag discharger when the boiler is under high load.

[0023] In some practicable embodiments, the box body 1 may be welded from a plurality of steel plates, a containing cavity is provided in the box body 1, the containing cavity is used to accommodate the slag discharge mechanism 2, the slag inlet 11 may be located at the upper left of the box body 1, and the slag outlet 12 may be located at the lower right of the box body 1, that is, the slag inlet 11 and the slag outlet 12 are respectively located at opposite sides of the box body 1 in the slag feeding direction, wherein, in order to facilitate slag inlet and slag outlet, the slag inlet 11 may be set to be expanded in the direction away from the box body 1, and the slag outlet 12 may be set to be expanded in the direction of the slag discharge mechanism 2. The slag inlet 11 and the slag outlet 12 may be integrally formed with the box body 1, or the slag inlet 11 and the slag outlet 12 may be first formed by welding steel plates, and then fixedly connected to the box body 1 by welding. Of course, in order to facilitate slag feeding and discharging, crushing wheels can also be set in the slag feeding port 11 and the slag discharging port 12. For example, there are multiple crushing wheels arranged at intervals along the width direction of the slag feeding port 11 and the slag discharging port 12, so that larger pieces of coal slag can be crushed into smaller pieces of coal slag, thereby facilitating transportation.

[0024] In some embodied embodiments, the driving mechanism 3 includes a first driving component 31 and a second driving component 32 that are independently arranged. The first driving component 31 is used to drive the first driving roller 21 located at the first end of the conveyor belt 22, and the second driving component 32 is used to drive the first driving roller 21 located at the second end of the conveyor belt 22. The slag discharge capacity of the slag discharger is improved by synchronously driving the two first driving rollers 21, thereby avoiding overloading of the conveyor belt 22 and causing shutdown.

[0025] Optionally, the first driving assembly 31 includes a first motor 311, a primary reducer 312, a secondary reducer 313 and an output shaft 314, wherein the output end of the first motor 311 is transmission-connected to the input end of the primary reducer 312, the first motor 311 can be selected to have a voltage of 380V and a rotation speed of 750 rpm, the output end of the primary reducer 312 is transmission-connected to the input end of the secondary reducer 313 through a first transmission chain 315, and the output end of the secondary reducer 313 is transmission-connected to the output shaft 314 through a second transmission chain 316. 14, wherein the primary reducer 312 and the secondary reducer 313 are both conventional gear reducers, so that the high speed output by the first motor 311 can be reduced to the speed of the first drive roller 21 adapted to the working condition through the primary reducer 312 and the secondary reducer 313, and the output end of the output shaft 314 is connected to the first drive roller 21 at the first end of the conveyor belt 22 through the transmission, so as to drive the first drive roller 21 at the first end of the conveyor belt 22 to rotate, so as to improve the carrying capacity of the conveyor belt 22. In addition, the structure of the second drive assembly 32 can refer to the first drive assembly 31, that is, the second drive assembly 32 can also be driven by an independent motor, and after being decelerated by the two-stage reducer, the first drive roller 21 at the second end of the conveyor belt 22 is driven by the corresponding output end output, so that at least two first drive rollers 21 on the conveyor belt 22 actively drive the conveyor belt 22, so as to improve the carrying capacity of the conveyor belt 22.

[0026] Of course, the two first drive rollers 21 mentioned above are schematic. In other embodiments, the number of first drive rollers 21 can also be selected according to specific working conditions. For example, the number of first drive rollers 21 can be three, wherein the three first drive rollers 21 are arranged at intervals along the slag conveying direction and are all connected to the conveyor belt 22 for transmission, that is, a first drive roller 21 is provided at the first end of the conveyor belt 22, a first drive roller 21 is provided at the second end, and a first drive roller 21 is provided in the middle of the conveyor belt 22. Therefore, different numbers of first drive rollers 21 can be driven according to specific working conditions to meet the slag transportation requirements of different weights.

[0027] In some practicable embodiments, the conveyor belt 22 may be a steel belt, and the conveyor belt 22 includes a first horizontal section 221 and a first climbing section 222. The outer end of the first horizontal section 221 is located below the slag inlet 11, and a first driving roller 21 is provided at the outer end of the first horizontal section 221. The first horizontal section 221 is used to receive the coal slag entering through the slag inlet 11. In order to facilitate the transportation of the coal slag, an upwardly protruding partition is provided on the front of the steel belt, and the partition can be arranged at intervals on the top surface of the steel belt along the slag conveying direction. In order to facilitate the discharge of the coal slag from the slag outlet 12, a first climbing section 222 is provided on the conveyor belt 22. The first climbing section 222 can increase the potential energy of the coal slag, avoid the accumulation of the coal slag, and can be discharged from the slag outlet 12 by its own gravity. It can be understood that a first transition section can be provided between the inner end of the first horizontal section 221 and the first climbing section 222, so that the coal slag can be stably transported on the conveyor belt 22.

[0028] Optionally, in order to facilitate the cleaning of the conveyor belt 22, in some feasible embodiments, the dry slag discharger for the thermal power unit also includes a cleaning mechanism 4, which is located below the conveyor belt 22. The cleaning mechanism 4 includes a cleaning chain 41, a plurality of scrapers arranged on the cleaning chain 41, and a second driving roller 42 and a driven roller 43 arranged at both ends of the cleaning chain 41. Therefore, when it is necessary to clean the conveyor belt 22, the second driving roller 42 can be driven to rotate, driving the scraper on the cleaning chain 41 to scrape the top surface of the conveyor belt 22, and the scraped coal slag can be sent to the slag outlet 12 through the cleaning chain 41 for discharge.

[0029] In some practicable embodiments, the cleaning chain 41 includes a second horizontal section 411 and a second climbing section 412, a scraper is arranged on the second horizontal section 411, the outer end of the second horizontal section 411 is located below the slag inlet 11, and the outer end of the second climbing section 412 is located above the slag outlet 12, so that the scraper on the second horizontal section 411 can be used to scrape off the coal slag on the conveyor belt 22. Through the setting of the second climbing section 412, the coal slag scraped off the conveyor belt 22 can be conveniently sent to the slag outlet 12 through the cleaning chain 41 for discharge. Of course, the setting of the second climbing section 412 can also prevent the coal slag from accumulating on the cleaning chain 41.

[0030] In order to correct the deviation of the conveyor belt 22, in some feasible methods, the dry slag discharger for the thermal power unit also includes two guide rollers 5, and the two guide rollers 5 are rotatably arranged on the opposite sides of the conveyor belt 22 in the width direction, and the guide rollers 5 are respectively abutted against the two side edges of the conveyor belt 22.

[0031] In order to ensure stable conveying of the conveyor belt 22, in some practicable embodiments, the dry slag discharger for thermal power generation units further includes a plurality of rollers 6 and a plurality of pressure rollers 7, wherein the plurality of rollers 6 are rotatably disposed below the conveyor belt 22, and the plurality of rollers 6 abut against the bottom surface of the conveyor belt 22, thereby forming a stable support for the conveyor belt 22, and avoiding deformation of the conveyor belt 22 due to excessive coal slag on the conveyor belt 22. The plurality of pressure rollers 7 are rotatably disposed above the conveyor belt 22, and the plurality of pressure rollers 7 abut against the top surface of the conveyor belt 22, thereby changing the conveying direction of the conveyor belt 22.

[0032] In some practicable embodiments, in order to prevent the coal slag in the first climbing section 222 from falling off the conveyor belt 22, the dry slag discharger for the thermal power unit also includes a humidifying structure 8. The humidifying structure 8 is arranged in the box body 1 and is located above the first climbing section 222 of the conveyor belt 22. The humidifying structure 8 includes a water pipe and a water outlet pipe arranged on the water pipe and facing the conveyor belt 22. By spraying an appropriate amount of water, the coal slag can undergo partial nodule weight gain, thereby preventing the coal slag from falling back from the first climbing section 222 to the first horizontal section 221 during the climbing process, so that the coal slag is blocked in the first horizontal section 221.

[0033] In order to facilitate the control of the operation of the slag discharger, in some feasible methods, the dry slag discharger for thermal power units also includes a controller and a sensor. The controller can be a PLC controller, a single-chip microcomputer or the control center of the thermal power unit. The sensor is a weighing sensor and is arranged on the conveyor belt 22. The weighing sensor is used to weigh the weight of the coal slag on the conveyor belt 22, so as to monitor the slag delivery amount of the coal slag in real time. The weighing sensor can be connected to the controller signal by wire or wirelessly. The motor in the drive mechanism can also be connected to the controller signal by wire or wirelessly. Therefore, the controller selectively turns on the motors corresponding to different numbers of first drive rollers 21 in the drive mechanism according to the weight result of the coal slag to adapt the carrying capacity of the conveyor belt 22 corresponding to the weight of the coal slag.

[0034] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0035] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0036] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A dry slag discharger for a thermal power unit, characterized in that: include: A box body, which is provided with a slag inlet and a slag outlet; A slag discharge mechanism is arranged in the box body, and the slag discharge mechanism includes a conveyor belt and at least two first drive rollers connected to the conveyor belt in a transmission manner, wherein the two first drive rollers are arranged at intervals along the slag feeding direction and are respectively located at two ends of the conveyor belt, the first end of the conveyor belt is located below the slag inlet, and the second end is located above the slag outlet. The driving mechanism is arranged on the box body and is drivingly connected to the two first driving rollers respectively.

2. The dry slag discharger for thermal power generation units according to claim 1, characterized in that: The driving mechanism includes a first driving component and a second driving component which are independently arranged, wherein the first driving component is used to drive the first driving roller located at the first end of the conveyor belt, and the second driving component is used to drive the first driving roller located at the second end of the conveyor belt.

3. The dry slag discharger for thermal power generation units according to claim 2, characterized in that: The first drive assembly includes a first motor, a primary reducer, a secondary reducer and an output shaft, wherein the output end of the first motor is transmission-connected to the input end of the primary reducer, the output end of the primary reducer is transmission-connected to the input end of the secondary reducer via a first transmission chain, the output end of the secondary reducer is transmission-connected to the input end of the output shaft via a second transmission chain, and the output end of the output shaft is used to drive the first drive roller located at the first end of the conveyor belt.

4. The dry slag discharger for thermal power generation units according to claim 1, characterized in that: The number of the first driving rollers is three, wherein the three first driving rollers are arranged at intervals along the slag conveying direction and are all drivingly connected to the conveyor belt.

5. The dry slag discharger for thermal power units according to any one of claims 1 to 4, characterized in that: The dry slag discharger for thermal power units also includes a cleaning mechanism, which is located below the conveyor belt. The cleaning mechanism includes a cleaning chain, a plurality of scrapers arranged on the cleaning chain, and a second driving roller and a driven roller arranged at both ends of the cleaning chain. The scrapers are used to clean the conveyor belt as the cleaning chain moves.

6. The dry slag discharger for thermal power generation units according to claim 5, characterized in that: The conveyor belt includes a first horizontal section and a first climbing section, the cleaning chain includes a second horizontal section and a second climbing section, the scraper is arranged on the second horizontal section, the outer end of the first horizontal section and the outer end of the second horizontal section are both located below the slag inlet, and the outer end of the first climbing section and the outer end of the second climbing section are both located above the slag outlet.

7. The dry slag discharger for thermal power generation units according to claim 1, characterized in that: The dry slag discharger for thermal power units also includes two guide rollers, which are rotatably arranged on opposite sides of the conveyor belt in the width direction, and the guide rollers are respectively in contact with the two side edges of the conveyor belt.

8. The dry slag discharger for thermal power generation units according to claim 1, characterized in that: The dry slag discharger for thermal power units also includes a plurality of supporting rollers and a plurality of pressure rollers, wherein the plurality of supporting rollers are rotatably arranged below the conveyor belt, and the plurality of supporting rollers abut against the bottom surface of the conveyor belt; the plurality of pressure rollers are rotatably arranged above the conveyor belt, and the plurality of pressure rollers abut against the top surface of the conveyor belt.

9. The dry slag discharger for thermal power generation units according to claim 6, characterized in that: The dry slag discharger for thermal power units also includes a humidifying structure, which is arranged in a box body and located above the first climbing section of the conveyor belt. The humidifying structure includes a water pipe and a water outlet pipe arranged on the water pipe and facing the conveyor belt.

10. The dry slag discharger for thermal power generation units according to claim 1, characterized in that: The dry slag discharger for thermal power generation units further comprises a controller and a sensor. The sensor is arranged on the conveyor belt. The sensor and the driving mechanism are respectively connected to the controller signal.

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