Pulverized coal distributor style
The types of coal powder distributors produced by Xiangye Environmental Protection Company are divided into: bottle type, ball type, disc type, cone type (inclined angle type), curved branch pipe type. According to the material of the branch pipes, there are wear-resistant alloy type, wear-resistant ceramic type, stainless steel type and other types, which are respectively used in different working conditions. There are two connection methods: flange and wire mouth.
This new coal powder distributor is a cone-type distributor, which is an upgraded product of the old bottle-type, disc-type and ball-type distributors. Generally, the branch pipes of disc-type and bottle-type distributors are horizontally distributed. Since the coal powder is transported by the air flow with a certain pressure in the coal injection system, the equipment is subject to relatively large wear. In the past, some coal powder distributors had a throat structure, resulting in large resistance; some had unreasonable inner cavity structures, causing pulsation when coal powder passed through, leading to unstable coal injection volume; some had uneven coal powder distribution; some had severe equipment wear of the distributors, etc.
The coal powder distributor consists of a main pipe, a main body (cone type, disc type, bottle type) and each branch pipe. Each branch pipe is evenly distributed above the main body. For the cone type, each branch pipe is distributed at an inclined angle (90 degrees or 120 degrees). The coal 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 lance. This product is made of carbon steel structural parts, with precise processing and high geometric accuracy. The inner cavity of the cone has a simple structure, small volume, light weight and easy maintenance.
The control accuracy of coal injection volume at each tuyere of this distributor can reach ±3% of the large coal injection volume, which fully ensures the uniform combustion of the raceway around the blast furnace hearth. The flow rate of the fluid in the coal powder distributor is the same as that in the pipeline, with small wear and long service life. The coal 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 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 inner cavity of the cone has a simple structure, small volume, light weight and easy maintenance. The main body of the coal powder distributor is a cone-shaped 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 gas flow characteristics, the high-pressure solid-gas flow formed after entering the inner cavity creates a strong vortex, which wraps the coal powder and distributes 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 the coal powder flows through the distributor, there is no swirl or pulsation.
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