Is the reciprocating grate a product for energy saving and emission reduction?

　　The energy-saving and emission reduction tasks in China's foundry industry are urgent and imperative. Promoting energy-saving and emission reduction in China's foundry industry.Reciprocating GrateEnergy-saving and emission reduction work should start from two aspects: technological transformation and policy guidance. In terms of technological transformation of reciprocating grate: efforts should be made to improve casting quality, transform outdated equipment, promote the use of energy-saving and emission reduction equipment, and improve the casting process technology level of boiler accessory enterprises.

　　The uniformity of distribution on the reciprocating grate, the consistency of coal layer thickness, and the uniformity of moisture in coal are all important factors affecting boiler combustion efficiency, boiler output, and pollution emissions. They are also another major reason for the actual operating efficiency of coal-fired chain grate boilers in China being far lower than the design efficiency.Reciprocating GrateThe grate parts are very dense and generally invisible to the naked eye. Gray iron and ductile iron can see particles, while passive grate parts have larger particles. The surface of cast steel parts for boiler accessories is rough, and the area of risers and pouring gates is large, making it necessary to cut and eliminate. The reciprocating grate cast iron cannot be cut off. The energy utilization rate is low, and waste is serious. Especially for small and medium-sized boilers, the number is large, coal consumption is high, and the average thermal efficiency is only over 65%, with half of the precious energy wasted. Atmospheric pollution emissions exceed standards, causing serious environmental pollution, directly affecting human health and sustainable economic development.

　　Garbage enters the incinerator for burning, with air drawn from the garbage storage pit and secondary air from the top of the boiler to assist combustion, ensuring complete combustion of the garbage. The reciprocating grate needs to adapt to the new situation of energy-saving and emission reduction. It not only complies with national energy-saving and emission reduction policies but also reduces heating costs and ensures heating quality. For grate boilers, the structural type, area, and combustion conditions vary in quality, and the arch structure reasonably or directly reflects this important parameter of carbon content in the slag. Below is an introduction to the classification of reciprocating grates.

　　1. Classification of reciprocating grates by Applications

　　Power StationReciprocating Grate: Mostly large capacity, high parameter boilers, combustion in the combustion chamber, high thermal efficiency, and the export working medium is superheated steam.

　　Industrial reciprocating grate: Used for industrial production and heating, mostly low pressure, low temperature, small capacity boilers, with combustion mainly on the fire bed, and lower thermal efficiency; those with steam as the export working medium are called steam industrial boilers, and those with hot water as the export working medium are called hot water boilers.

　　MarineReciprocating Grate: Used for ship power, generally adopting low and medium parameters, mostly fuel oil. The boiler is small in size and light in weight.

　　Locomotive reciprocating grate: Used for locomotive power, generally small capacity, low parameters, with combustion mainly on the fire bed, primarily using coal, and the boiler structure is compact, now used less.

　　Injection boiler: Used for steam injection thermal recovery of heavy oil in oil fields, with the export working medium generally being high-pressure wet steam.

　　2. Classification of reciprocating grates by structure

　　Fire tube boiler: Flue gas flows through the fire tubes, can be made into small capacity, low parameter boilers, with lower thermal efficiency, but simple structure, low water quality requirements, and convenient operation and maintenance.

　　Water tube boiler: Steam and water flow through the tubes, can be made into small capacity, low parameter boilers, and can also be made into large capacity, high parameter boilers. Power station boilers are all water tube boilers, with higher thermal efficiency, but also higher requirements for water quality and operational levels.

　　3,Reciprocating GrateClassification by circulation method

　　Natural circulation drum boiler: Has a drum, utilizes the density difference of the working medium in the downcomer and riser to generate working medium circulation, and can only be applied below critical pressure.

　　Multiple forced circulation drum boiler: Also known as auxiliary circulation drum boiler. Has a drum and circulation pump, utilizes the density difference of the working medium in the circulation loop and the pressure of the circulation pump to establish working medium circulation. Can only be applied below critical pressure.