Discussion on Burner Silicon Carbide Nozzle

Discussion on Burner Silicon Carbide Nozzle

The main function of the burner silicon carbide nozzle is to spray the pulverized coal air mixture (primary air) supplied by the pulverized coal preparation system and the secondary air required for combustion into the furnace at a certain concentration and speed, respectively, to achieve stable ignition and combustion in the suspended state.

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Silicon Carbide Nozzle

Silicon Carbide Nozzle

The burner nozzle generally adopts the structure of cast steel, and the proper swing of the burner nozzle can change the position of the flame center to adjust the temperature level of reheat steam; the dense and lean pulverized coal burner can prevent coking and high-temperature corrosion in the furnace, and has stable ignition and good low-load stability.

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On the secondary reheat boiler

On the secondary reheat boiler

The secondary reheat power generation technology is the key technology of the "National Energy Technology" Twelfth Five-Year Plan ". It has a driving effect on leading the progress of power generation technology and improving the level of my country's power manufacturing industry. It represents the current world's leading power generation technology and has high efficiency, Low energy consumption, low emissions and other advantages. It is estimated that the thermal efficiency of the secondary reheat unit is about 2% higher than that of the conventional primary reheat unit, and the carbon dioxide emission reduction is about 3.6. In the secondary reheat system of Suqian Power Plant, the secondary reheat silicon carbide inner liner of the upper spring instrument is used, which has good effect and improved efficiency.

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Defects of Cast Steel Nozzle

Defects of Cast Steel Nozzle

The defects of cast steel nozzles mainly include the following aspects. 1. The cast steel nozzle is not wear-resistant, corrosion-resistant, not high temperature resistant, short service life. Need to stop furnace replacement, resulting in great economic losses. 2. The cast steel nozzle is easy to be damaged during the operation of the unit, and the blunt body of the nozzle often falls off, which threatens the operation of the burner and the safe operation of the slag fishing machine.

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Discussion on Applicable Working Conditions and Production Process of Silicon Carbide Wear Resistant Elbow

Discussion on Applicable Working Conditions and Production Process of Silicon Carbide Wear Resistant Elbow

On the spring instrument editor with you a brief introduction to the applicable working conditions and production process of silicon carbide wear-resistant elbow. Silicon carbide (SiC) wear-resistant elbow is also a kind of non-compound ceramics, but silicon carbide has a long history in the ceramic series, in recent years is an important refractory material, abrasive material heating body. This is a kind of use of SiC has excellent heat resistance, intensity, hardness, wear resistance, volume resistance parameters such as thermal state, machine, electrical characteristics of the material, the development of the industry has played a great role.

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Discussion on Silicon Carbide Nozzle

Discussion on Silicon Carbide Nozzle

Silicon carbide nozzle has the characteristics of high strength, no slag, no cracking, long life and convenient replacement. The product is used in fluidized bed boiler, pulverized coal boiler burner nozzle. The burner nozzle generally adopts the structure of cast steel, and the appropriate swing of the burner nozzle can change the position of the flame center to adjust the reheat steam temperature level; the dense and lean pulverized coal burner can prevent coking and high-temperature corrosion in the furnace, and has the characteristics of stable ignition, low load stability and low NOx emissions. After the primary air cast steel nozzle of the burner is burnt and deformed, the deviation between the flame center of the furnace and the design value is large, and the nozzle size is large, the initial momentum of the jet is reduced compared with that before burning, the range is shorter, and the rigidity is poor, the pulverized coal catches fire not far from the nozzle, the temperature near the nozzle is high, and slagging is easy to occur. The primary air nozzle of the burner needs to be replaced after burning. When replacing, the powder pipe connected to the outside of the burner needs to be disassembled, and the primary air nozzle of the burner and the nozzle are pulled out together for replacement, and then installed. The workload is large, the environment is poor, labor-consuming, time-consuming and expensive, resulting in great economic losses.

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