Overview
The Continuous Green Killing Machine is a critical piece of equipment in tea production, designed to halt oxidation by applying controlled heat to freshly plucked leaves. It replaces traditional batch-processing methods with a continuous workflow, improving efficiency and consistency. Modern versions integrate PLC systems for precise temperature and speed regulation, catering to large-scale tea factories. This machine is widely adopted in green, oolong, and black tea processing, where enzymatic deactivation is essential to preserve flavor profiles. Its stainless steel construction ensures hygiene and durability, while modular designs allow customization for different leaf types and throughput requirements.
Structure and Working Principle
The machine comprises a feeding hopper, conveyor belt, heating chamber (with gas, electric, or steam heat sources), and cooling section. Leaves are evenly spread on the belt, which moves through temperature-controlled zones. Heat penetrates the leaves rapidly, denaturing enzymes like polyphenol oxidase without scorching. Advanced models feature multi-zone heating (e.g., high initial heat followed by gradual cooling) to prevent moisture loss. Infrared sensors or airflow systems ensure uniform treatment. The continuous process reduces labor costs and achieves throughputs of 200–1,000 kg/hour, depending on belt width and heating capacity.
Key Features
Automation is a standout feature, with touchscreen interfaces allowing operators to set parameters like belt speed (0.5–5 m/min) and temperature profiles. Energy efficiency is prioritized through insulated chambers and heat recovery systems, cutting operational costs by up to 30% compared to traditional fryers. Other innovations include self-cleaning belts and real-time moisture monitoring. High-end models offer remote diagnostics and IoT integration for predictive maintenance. The absence of direct flame contact (in steam/gas variants) preserves leaf integrity, crucial for premium teas.
Application Areas
Beyond tea, this machine adapts to herbal processing (e.g., mint, chrysanthemum) where oxidation control is needed. In Japan and China, it’s integral to matcha production, ensuring vibrant color retention. Some coffee producers also use it for preliminary bean drying. Regional adaptations exist: Chinese designs often emphasize high-temperature rapid processing, while Japanese models focus on gentle steaming for sencha. Export-oriented manufacturers offer configurations compliant with EU and FDA hygiene standards.
Maintenance and Precautions
Daily maintenance includes removing leaf residues from belts and inspecting heating elements for wear. Monthly checks should cover motor bearings and electrical connections. Silicone-based lubricants are recommended for conveyor chains to withstand high temperatures. Operators must avoid overloading the feeding hopper, which causes uneven heating. Sudden shutdowns during operation can damage heating coils—always follow the manufacturer’s cooldown protocol. For safety, install emergency stop buttons and thermal overload protectors.
B2B Procurement Guide
When sourcing, verify the machine’s compatibility with your tea varieties (e.g., delicate buds vs. mature leaves). Request energy consumption data and certifications like CE or ISO 9001. For factories with space constraints, compact models with vertical designs are available. Negotiate after-sales support terms, including spare parts availability (belts typically last 1–2 years). Consider leasing options for small-scale producers. Leading manufacturers are based in China, India, and Japan, with lead times of 30–90 days for customized orders.
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