PowerChina undertook an urban domestic waste incineration power generation project equipped with a large closed waste storage pit. The pit features year-round high humidity, highly corrosive leachate steam, dust and putrid gas, requiring uninterrupted grabbing, stacking, mixing and furnace feeding of domestic waste. Ordinary lifting equipment cannot resist corrosion from sewage and malodorous gas, while manual operation brings high labor intensity and potential safety hazards. After multiple rounds of technical evaluation and on-site condition survey, the project side customized the QZ16t intelligent waste grab double-girder overhead crane from Henan Dafang Heavy Machinery. Equipped with a multi-claw hydraulic waste grab and a fully automatic intelligent control system, the crane realizes 24-hour unattended automatic waste mixing, stacking and feeding. Targeting the waste pit’s severe corrosion, high humidity and high-frequency heavy-duty working conditions, Dafang’s team optimized the overall anti-corrosion structure, sealed electrical control and intelligent automatic system. The whole non-standard environmental-friendly grab crane was manufactured within 66 days. After anti-corrosion inspection, full-load pressure testing and intelligent program joint commissioning, the equipment passed the power plant’s environmental and safety acceptance in one pass and was stably put into continuous operation.
Project Execution & Solution Overview
Dafang customized the QZ16t intelligent waste grab double-girder overhead crane for the project, specially developed for harsh working conditions of power plant waste pits. Key project milestones and engineering solutions are listed below:
According to on-site operational demands and manufacturer technical strength, the project party selected Henan Dafang Heavy Machinery to customize the QZ16t intelligent waste grab double-girder overhead crane, professionally adapted for waste storage pits of waste-to-energy power plants.
Full-automatic Unattended Operation System
Equipped with a multi-petal hydraulic waste grab and intelligent automatic control system, the crane supports 24-hour unattended operation, automatically completing waste mixing, stacking and feeding to improve overall plant automation.
Specialized Optimization for Harsh Corrosive Conditions
Targeting the waste pit’s high humidity, strong corrosion and high-frequency heavy-load operation, Dafang optimized the heavy-duty anti-corrosion structure, fully sealed moisture-proof electric control and intelligent program to ensure long-term stable continuous operation.
66-day Efficient Production & One-time Acceptance Operation
The whole non-standard environmental protection grab crane was manufactured within 66 days. After anti-corrosion inspection, full-load pressure testing and intelligent system joint commissioning, the equipment passed the power plant’s environmental and safety acceptance at one time and was officially put into continuous operation in the waste storage pit.
Core Technical Features & Advantages
Full Anti-corrosion Heavy-duty Double-girder Structure
The entire unit features a thickened box-shaped double main beam structure; both the main beams and end beams are fabricated from Q355N weathering steel capable of withstanding acid and alkaline environments. The equipment is coated with a four-layer heavy-duty anticorrosion coating system: epoxy zinc-rich primer + epoxy cloudite intermediate coat + sealing and isolation coat + stain-resistant polyurethane topcoat. The unit is finished with Dafang Heavy Industry’s signature industrial yellow coating, which effectively shields it from corrosion caused by landfill leachate vapors and acid/alkaline gases. All ladders, maintenance platforms, and fasteners are subjected to hot-dip galvanizing treatment, and all weld joints are sealed with anti-corrosion sealant, ensuring the equipment’s durability in the perennially high-humidity, corrosive environment of landfill sites. The unit is rated as an A7 ultra-high-duty-cycle model, designed to perform continuous, 24/7 heavy-load grabbing operations without experiencing fatigue deformation under prolonged alternating loads.
Multi-claw Hydraulic Waste Grab for Efficient Feeding
The equipment is equipped with a five-blade hydraulic specialized waste handling grab bucket featuring a bucket body constructed from thickened, wear-resistant steel plate, ensuring that loose domestic waste is captured effectively without leakage or material adhesion; the hydraulic system incorporates built-in high-temperature and corrosion-resistant seals, eliminating any leakage issues even in high-temperature steam environments. The opening and closing force as well as the gripping depth of the grab bucket can be intelligently adjusted; the system automatically performs tasks such as determining the waste pile height, stratifying and homogenizing the waste, and feeding the waste in precise quantities. This ensures uniform mixing of the waste, enhances the efficiency of waste-to-energy incineration processes, reduces the frequency of manual on-site operations, and lowers the health risks associated with workers’ exposure to odorous exhaust gases.
IP66 Fully-sealed Explosion-proof & Intelligent Unmanned Control System
The water vapor and corrosive gases present in the waste storage tank can readily corrode electrical components; therefore, the entire electrical system has been upgraded with anti-corrosion sealing measures: the electrical control cabinet features an IP66 waterproof, dustproof, and corrosion-resistant rating, and is equipped with an integrated constant-temperature dehumidification and heating module that automatically eliminates condensation within the cabinet; the frequency converter and contactors utilize specialized corrosion-resistant components, while the cables employ special acid-and alkali-resistant sheathed cables. The entire system is equipped with a fully automated intelligent dispatching system, which allows for the pre-setting of material stacking, mixing, and feeding sequences and supports remote centralized automatic operation; when paired with video surveillance and laser level detection systems, this system eliminates the need for personnel to be stationed in the operator’s cab on-site; however, a dual backup mode—combining local cab manual control with wireless remote control—is retained to accommodate maintenance and emergency operational scenarios. The entire unit is fitted with a comprehensive set of safety interlock devices, including overload protection, deep travel limit switches, main crane stroke limit switches, grab bucket opening/closing pressure monitoring, and automatic fault alarm systems.
Closed-environment Dedicated Ventilation and Maintenance Configuration
The overhead travel section is equipped with a fully enclosed maintenance walkway and protective railings; all motors and reducers are fitted with independent rainproof and corrosion-resistant protective covers; the main truck’s travel mechanism utilizes sealed bearings to prevent dust or wastewater from infiltrating and damaging the components; the cables are installed using corrosion-resistant drag-cable reels that move synchronously with the grab bucket’s lifting and lowering motion; these cables are designed to be corrosion-resistant and age-resistant, making them less prone to cracking or damage in long-term high-humidity environments; the storage pit walls are equipped with laser level sensors that work in conjunction with the overhead crane for automatic scheduling, enabling precise determination of the material pile height and preventing the grab bucket from striking the pit bottom or the pit walls.
On-Site Delivery & After-Sales
The complete QZ16t waste grab overhead crane is transported to the power plant site in separate modules including main girder, hoisting trolley, hydraulic grab and intelligent central control system. Our professional installation team completed full on-site construction procedures including main girder splicing, track calibration, hydraulic pipeline laying, intelligent program joint commissioning and full-load grabbing pressure testing. Complete documents such as steel anti-corrosion test reports, non-destructive testing certificates, third-party load acceptance reports and environmental protection equipment safety filing materials were delivered to PowerChina to support environmental protection completion acceptance.
Special practical training on intelligent system operation, automatic feeding program setting, equipment anti-corrosion maintenance in corrosive environments and grab hydraulic system maintenance was provided for the power plant operation and maintenance team after equipment operation. 7×24-hour full-cycle remote technical support and sufficient original spare parts such as grab hydraulic components and anti-corrosion electrical accessories ensure uninterrupted stable feeding and power generation of the waste incineration power plant throughout the year.
Summary
The QZ16t intelligent waste grab overhead crane delivered to the PowerChina project is a special environmental-friendly lifting equipment developed by Dafang Heavy Machinery specifically for domestic waste incineration power generation and biomass thermoelectric projects. With three core advantages of four-layer anti-corrosion structure, hydraulic multi-claw grab and full-automatic unmanned intelligent control, it perfectly solves the industry pain points of high humidity corrosion, high manual labor intensity and uneven feeding in waste storage pits.
Dafang Heavy Machinery can customize 10t~50t waste grab overhead cranes, straw grab cranes and bulk material grab equipment for environmental power generation and solid waste treatment enterprises, providing one-stop services including waste pit on-site survey, intelligent automatic scheme design, heavy anti-corrosion equipment manufacturing, on-site installation & commissioning and central control intelligent program matching. Customized solutions and quotations are available for all lifting equipment demands in the environmental protection and solid waste treatment industry.
On This Page
Share This Article
Get in Touch
Get a Fast Quote & Drawing
Submit your lifting capacity, span, and project requirements below to receive a personalized engineering blueprint within 24 hours.
This medium‑sized hydropower station is located in mountain‑canyon areas of Southwest China, featuring large reservoir drop, persistent high‑humidity water vapor and sharp day‑night temperature differences.
A new container freight yard has been built at an international land border port in Mongolia, undertaking trans‑shipment, stacking and handling of standard containers for China‑Russia and China‑Mongolia cross‑border trade.
A leading domestic manufacturer of heavy-duty complete equipment built a new general assembly workshop with a span of 25.8 meters, mainly responsible for the assembly of large pressure vessels, heavy construction machinery main units and ultra-long segmented components.
