Product Details
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Submerged scraper conveyor
Category：
Immersed slag removal system of pulverized coal boiler
m³
Details
Submerged scraper conveyor is based on the absorption of domestic and foreign technologies by our company，The product has been proved by the operation of major power plants: stable product performance, mature technology and reliable quality. The main technical indicators have reached the advanced level of similar products at home and abroad, the product represents the current domestic design and manufacturing level.
GBL-12×n submerged scraper conveyor has the following unique and recognized features.
(1) As the power of submerged scraper conveyors for large units is above 600MW, a full set of hydraulic drive device manufactured by leading companies including German Bosch Rexroth, Pleiger or Swedish Hagglunds, including a hydraulic motor with low speed and high torque and its power station. It is featured with high torque transmission efficiency and desirable low speed. Even if the output speed of the hydraulic motor is 0.2rpm, no crawling will occur, keeping users from any worry.
The submerged scraper conveyor for units below 600MW is driven by variable-frequency and variable-speed motor and the motor, reducer and frequency converter imported or manufactured by famous brands at home are available.
(2) The highly wear-resistant ring chain provided by Austrian Pewag, German THIELE or German RUD Gruppe is adopted for transmission, with the surface hardness as high as HV800. It can work for as long as five years in normal working conditions and has a breaking load of 500kN.
(3) Anti-bending and wear-resistant scraper design: The angle iron, web plate and stiffened plate are all reinforced. Even under the maximum output, the scraper will neither be deformed nor broken. As the working edge of the scraper is welded with hardened high manganese steel, the scraper is wear-resistant and has a long service life.
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(4) Connection type of scraper and chain: The scraper and the chain are connected by fork-type bolt-free hinge, making it quite convenient to disassemble and adjust the scraper spacing and preventing loosening and rusting of bolt connection and harmful restraint of rigid connection. Therefore, the connection is reliable.
(5) Chain tension type: We provide three types of tensioning methods for your option. The automatic hydraulic tensioning devices manufactured by the world-renowned Italian Hydr-app Spa, French Bonlogue or American Parker Hannifin are recommended for submerged scraper conveyors of large units above 600MW as they need no manual operation and the tensioning force of chain always remains the same. In order to cut down cost, a manual hydraulic tensioning device is recommended for submerged scraper conveyors of units below 600MW. The cost-effective worm is recommended for submerged scraper conveyors of units below 300MW for decreasing the speed and increasing the force. A worm-operated chain tensioning mechanism is labor-saving and easy to operate. Besides, its self-locking performance makes it unnecessary to adjust the tightness of nuts when adjusting the tensioning force.
(6) Tank lining: As the horizontal section and inclined section of the upper bin and the lower tank are all lined with anti-breaking and anti-falling basalt cast stone, it has a service life of no less than 10 years.
When required by the user, replaceable wear-resistant steel plate can be used for the upper tank.
(7) Horizontal removal mode of submerged scraper conveyor: manual and electric self-drive. According to different use conditions of submerged scraper conveyors, multiple sets of road wheels, or road wheels with drive are disposed for the convenience of removal and maintenance of the submerged scraper conveyor.
(8) Tail type: vertical closed type. This type can keep the environment clean. Thanks to the specially designed quick opening tail access door, the scraper chain can be replaced without stopping the boiler.
(9) Drain valve type: anti-blocking disc core type. This drain valve replaces the gate-type stop valve which is commonly used at home and abroad. As it makes dredging possible after ash blockage, it is quite practical.
(10) Manhole type: quick opening type without bolts. This manhole can be opened as soon as it is poked, preventing the difficulty in opening and operating as a result of bolt rusting and corrosion.
(11) Bin strength: the bin has a service life of no less than 30 years thanks to its water burst fracture-resistant, strong coking and splash-proof design. When the bin is full of ash, it can be started normally and the bin body is not deformed.
(12) Slag removal of return scraper: A counterweight slag removal scraper set is disposed at the return scraper of the return chain at the discharge port to basically remove slag on the return journey of the scraper after the scraper of the submerged scraper conveyor unloads slag.
(13) Drag sprocket: The concave tooth-shaped type with large bearing capacity is adopted. Its most distinctive feature is that it can improve the meshing performance of the chain and the drag sprocket and thus ensure that the chain does neither crawl nor fall off. At the same time, as the concave tooth structure is less sensitive to circular pitch lengthening than a convex tooth structure due to chain wearing, the service life of chain can be extended.
(14) Overflow water clarification: The overflow device of the submerged scraper conveyor is equipped with serrated overflow weir and PVC (or stainless steel) parallel inclined plate clarifier to ensure that the concentration of suspended matters in overflow water is within
In the case of low requirements for water quality, it can be reused directly. In case of high requirements, the overflow water of the submerged scraper conveyor is pumped into the high-efficiency concentrator to further improve the quality of reuse water and get prepared for the recycling of slag removal water.
(15) The submerged scraper conveyor is sufficiently mechanically and electrically protected. Specifically, the submerged scraper conveyor is configured with chain dropping, chain breaking, chain blocking, overcurrent and overload protection devices. In case of any fault of the submerged scraper conveyor, the above protection devices can all stop the conveyor automatically and give an alarm. The submerged scraper conveyor is equipped with a high temperature alarm.
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Qingdao Zdz Electric Power Environmental Protection Equipment Co., Ltd.
TEL：+86-0532-872501010 +86-0532-87250138
FAX：+86-0532-87256735
EMAIL：a87250101@126.com