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Xiangye Environmental Protection Company's produced coal powder distributors are available in the following styles: pullo-type, ball-type, disc-type, cone-type (inclined-angle type), and bent branch-pipe type. Classified by branch-pipe material, there are wear-resistant alloy type, wear-resistant ceramic type, stainless steel type, and other types, each suitable for different working conditions. There are two connection methods: flange and threaded joint.
This new type of coal powder distributor is a cone-type distributor, which is an upgraded product replacing the old pullo-type, disc-type, and ball-type distributors. Generally, the branch pipes of disc-type and pullo-type distributors are horizontally distributed. Since the coal powder injection system transports coal powder through air flow with a certain pressure, it causes significant wear on equipment. In the past, some coal powder distributors had a throat structure with large resistance; some had unreasonable inner cavity structures, leading to pulsation when coal powder passed through, resulting in unstable coal powder injection volume; some had uneven coal powder distribution; some had severe equipment wear, etc.
The coal powder distributor consists of a main pipe, a main body (cone-type, disc-type, pullo-type), and each branch pipe. Each branch pipe is evenly distributed above the main body. For cone-type distributors, each branch pipe is distributed at an inclined angle (90 degrees or 120 degrees). The coal powder injection branch pipes (8, 10, 12, 14, 16, 18) are evenly distributed around the upper part of the distributor main body. The lower end of the distributor is connected to one end of the coal conveying main pipe, and the upper branch pipes of the distributor are connected to each coal powder injection gun. This product is made of carbon steel structural parts, with precise processing and high geometric accuracy. The cone inner cavity has a simple structure, small volume, light weight, and is easy to maintain.
The control accuracy of coal powder injection volume at each tuyere of this distributor can reach ±3% of the large coal powder injection volume, ensuring full combustion uniformity in the raceway around the blast furnace hearth. The flow rate of fluid in the coal powder distributor is the same as that in the pipeline, resulting in low wear and long service life. The coal powder injection distributor has no throat structure, with small resistance loss, avoiding throat blockage and the decrease of distribution accuracy caused by uneven throat wear. This coal powder distributor is suitable for coal powder conveying systems under various gas-solid ratios of blast furnace coal powder injection systems, and can be used for both dilute-phase conveying and dense-phase conveying.
This product is made of carbon steel structural parts, with precise processing and high geometric accuracy. The cone inner cavity has a simple structure, small volume, light weight, and is easy to maintain. The main body of the coal powder distributor has a cone inner cavity, and the sum of the outlet areas of each branch pipe is similar to the area of the inlet channel. By utilizing the characteristics of air flow, when the supplemented high-pressure solid-gas flow enters the inner cavity, a strong vortex is formed, wrapping the coal powder and distributing it evenly to each branch pipe. The pulsation during conveying is small, the injection is stable and reliable, and it can reach the ideal flow rate for users. When coal powder flows through the distributor, there is no swirl or pulsation.
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