XINLI BOILER

Combustion characteristics of rice husk in horizontal chain boiler

29 Jun, 2021

　　Rice husk is a kind of fuel with light weight, ash content, high ash melting point, medium calorific value, and natural uniform particle size. It is suitable for horizontal chain boiler burning rice husk for comprehensive utilization of heat energy.

The specific combustion characteristics of the horizontal chain boiler are as follows

　　1. Rice husk ash is mainly composed of silica, and its ash melting point temperature is relatively high, which can reach above 1200℃. Under normal combustion temperature (the temperature in the furnace is maintained at 500-700℃), the burning of rice husk will not produce coking The problem.

　　2. The replacement burning of rice husk can achieve a stable combustion temperature in the furnace, which is very advantageous for the rapid combustion of the volatile components of the rice husk in the furnace and the burning of fixed carbon. The actual combustion experiment of rice husk on the horizontal chain boiler test bench shows that the carbon content of fly ash after the combustion of rice husk is less than 7%. The combustion efficiency can reach more than 98%.

　　3. The ash component of rice husk is mainly silica, and the ash particles are hard. Therefore, the abrasion of the pipe wall by the rice husk should be considered. In addition to the conventional boiler anti-wear measures, special care must be taken in the selection of the flue gas flow rate at the tail of the boiler. A reasonable flue gas flow rate is the key to solving the problem of the burning and abrasion of the rice husk in the furnace.

　　4. Due to the unique advantages of the burning method of burning rice husk, biomass energy is very adaptable as a fuel. Therefore, the horizontal chain coal-fired boiler can burn rice husk alone or burn coal alone, and the two can also achieve different ratios. Of mixed burning.

　　5. In addition, the flue gas emission after burning rice husk meets national environmental protection standards. The ash residue from the burning of rice husk can be used comprehensively.

practice shows that:

　　Rice husk burns stably in horizontal chain coal-fired boilers and has good burnout performance. The furnace temperature distribution is basically uniform, but the bed surface temperature is low, the temperature in the upper part of the furnace is relatively high (about 750°C), and the temperature of the furnace outlet is medium (about 700°C). At the same time, it is shown that the burning of rice husk in the horizontal chain coal-fired boiler or with coal has little effect on the load parameters of the boiler.

　　The above is to introduce you to the combustion characteristics of rice husk in horizontal chain boiler. For more product questions and quotation information, please consult online customer service, or send an email to [email protected], Xinli staff will serve you wholeheartedly!