1. Fixed grate: one of the oldest and simplest layer-burning combustion equipment, divided into two types: single-layer grate and double-layer grate. A single-layer grate is made of cast iron, with plate and strip shapes. B double-layer grate has two layers of grates, the upper grate is a fixed grate composed of water cooling pipes, and the lower grate is a fixed grate of ordinary cast iron. The space above the upper grate is the wind chamber, the space below the lower grate is the ash pit, and the space between the two layers of grates is the combustion chamber.
2. Chain grate: a combustion equipment with a relatively complete structure. Due to the high degree of mechanization (coal addition, slag removal, ash removal, etc. are all completed by machinery), mature manufacturing technology, stable and reliable operation, manual fire can make the fuel burn more fully, and the combustion rate is also high, which is suitable for large, medium and small industrial boilers. Domestic chain grates can be divided into chain belt type, beam type and scale type chain grate according to the structure. A chain belt chain grate is a light structure suitable for steam boilers with a rated evaporation capacity of less than 10t/Hd or combustion boilers of corresponding capacity. B beam chain grate uses a very rigid beam as a support, and the grate pieces are embedded in the groove of the support beam. When the sprocket on the driving shaft drives the chain to rotate, the beam and the entire grate on it move accordingly. C scale chain grate is suitable for steam boilers with a rated evaporation capacity greater than 10t/Hd or combustion boilers of corresponding capacity.
3. Reciprocating grate: a combustion equipment that uses the reciprocating motion of the grate to achieve mechanized coal feeding, slag removal, and fire stirring. Reciprocating grate grates can be divided into inclined reciprocating grates and horizontal reciprocating grates according to the layout. A inclined reciprocating grate is an inclined step type, and the grate consists of movable grate pieces and fixed grate pieces arranged alternately. B horizontal reciprocating grate is composed of fixed grate pieces and movable grate pieces staggered, and the grate pieces overlap each other.
4. Vibrating grate: A type of grate that consists of an eccentric block vibrator, a crossbeam, a grate sheet, a pull rod, a spring plate, a rear sealing device, a vibrator motor, a foundation screw, a shock-absorbing rubber pad, a lower frame, and a front sealing device. It is composed of measuring beams, fixed fulcrums and other components. It has the advantages of simple structure, easy manufacturing, light weight, low metal consumption, low equipment investment, good combustion conditions, high grate area load, and strong adaptability to coal types. It has been used in industrial boilers.
5. Coal thrower: According to the coal throwing method, the coal thrower can be divided into three types: wind coal thrower, mechanical coal thrower and mechanical-wind coal thrower. The mechanical coal thrower has the functions of both mechanical coal thrower and wind coal thrower. It has two main components: coal feeding component and coal throwing component.
6. Fluidized bed for boiling combustion: A gas-solid two-phase bed between a fixed bed and a suspended bed. Fluidized beds are divided into bubbling beds, turbulent beds and fast beds according to different fluidization velocities. AThe bubbling fluidized bed structure consists of a coal feeding device, an air distribution device, a wind chamber, an ash overflow port, a boiling layer, a suspension section, etc. Features Strong adaptability to coal types, can enhance heat transfer, save steel, facilitate the comprehensive utilization of ash, less environmental pollution than pulverized coal furnaces, and a simple boiler structure. BThe circulating fluidized bed is a new generation of high-efficiency, low-pollution clean coal combustion technology. Its characteristics are that the fuel and desulfurizer undergo multiple cycles in the fluidized bed state, repeatedly performing low-temperature combustion and desulfurization reactions. CThe main difference between the combustion process of the circulating fluidized bed and the bubbling fluidized bed is that 1. The fluidization velocity in the boiling layer of the circulating fluidized bed is very high, generally 3 to 10 m/s, up to 10 m/s, and the fluidization velocity of the bubbling fluidized bed boiler is 1 to 3 m/s.
7. Combustion equipment of pulverized coal boiler: The coal is first ground by coal grinding equipment and then sprayed into the furnace for combustion. The entire combustion process is carried out in a suspended state in the furnace. This type of boiler is called a pulverized coal furnace. Its characteristics can improve the mixing with air, speed up the ignition box and combustion, and the coal type is widely applicable, suitable for large and medium-sized boilers. The combustion equipment of pulverized coal boilers includes pulverized coal equipment, pulverizing system and pulverized coal burner.
8. Oil burner: It consists of a fuel nozzle and an air regulator; it is a combustion equipment that atomizes the fuel oil and sends it into the furnace after strong mixing with air, so that the oil-gas mixture is suspended in the furnace. Oil burners are key equipment for oil boilers. According to the type of fuel used, they can be divided into light oil burners and heavy oil burners. Heavy oil has a large viscosity, and a preheater is generally set in the heavy oil burner. Most industrial oil boilers are equipped with light oil burners.
9. Gas burner: It is the most important combustion equipment for gas boilers. Gas burners include diffusion burners, atmospheric burners and fully premixed burners.
1. Fixed grate: one of the oldest and simplest layer-burning combustion equipment, divided into two types: single-layer grate and double-layer grate. A single-layer grate is made of cast iron, with plate and strip shapes. B double-layer grate has two layers of grates, the upper grate is a fixed grate composed of water cooling pipes, and the lower grate is a fixed grate of ordinary cast iron. The space above the upper grate is the wind chamber, the space below the lower grate is the ash pit, and the space between the two layers of grates is the combustion chamber.
2. Chain grate: a combustion equipment with a relatively complete structure. Due to the high degree of mechanization (coal addition, slag removal, ash removal, etc. are all completed by machinery), mature manufacturing technology, stable and reliable operation, manual fire can make the fuel burn more fully, and the combustion rate is also high, which is suitable for large, medium and small industrial boilers. Domestic chain grates can be divided into chain belt type, beam type and scale type chain grate according to the structure. A chain belt chain grate is a light structure suitable for steam boilers with a rated evaporation capacity of less than 10t/Hd or combustion boilers of corresponding capacity. B beam chain grate uses a very rigid beam as a support, and the grate pieces are embedded in the groove of the support beam. When the sprocket on the driving shaft drives the chain to rotate, the beam and the entire grate on it move accordingly. C scale chain grate is suitable for steam boilers with a rated evaporation capacity greater than 10t/Hd or combustion boilers of corresponding capacity.
3. Reciprocating grate: a combustion equipment that uses the reciprocating motion of the grate to achieve mechanized coal feeding, slag removal, and fire stirring. Reciprocating grate grates can be divided into inclined reciprocating grates and horizontal reciprocating grates according to the layout. A inclined reciprocating grate is an inclined step type, and the grate consists of movable grate pieces and fixed grate pieces arranged alternately. B horizontal reciprocating grate is composed of fixed grate pieces and movable grate pieces staggered, and the grate pieces overlap each other.
4. Vibrating grate: A type of grate that consists of an eccentric block vibrator, a crossbeam, a grate sheet, a pull rod, a spring plate, a rear sealing device, a vibrator motor, a foundation screw, a shock-absorbing rubber pad, a lower frame, and a front sealing device. It is composed of measuring beams, fixed fulcrums and other components. It has the advantages of simple structure, easy manufacturing, light weight, low metal consumption, low equipment investment, good combustion conditions, high grate area load, and strong adaptability to coal types. It has been used in industrial boilers.
5. Coal thrower: According to the coal throwing method, the coal thrower can be divided into three types: wind coal thrower, mechanical coal thrower and mechanical-wind coal thrower. The mechanical coal thrower has the functions of both mechanical coal thrower and wind coal thrower. It has two main components: coal feeding component and coal throwing component.
6. Fluidized bed for boiling combustion: A gas-solid two-phase bed between a fixed bed and a suspended bed. Fluidized beds are divided into bubbling beds, turbulent beds and fast beds according to different fluidization velocities. AThe bubbling fluidized bed structure consists of a coal feeding device, an air distribution device, a wind chamber, an ash overflow port, a boiling layer, a suspension section, etc. Features Strong adaptability to coal types, can enhance heat transfer, save steel, facilitate the comprehensive utilization of ash, less environmental pollution than pulverized coal furnaces, and a simple boiler structure. BThe circulating fluidized bed is a new generation of high-efficiency, low-pollution clean coal combustion technology. Its characteristics are that the fuel and desulfurizer undergo multiple cycles in the fluidized bed state, repeatedly performing low-temperature combustion and desulfurization reactions. CThe main difference between the combustion process of the circulating fluidized bed and the bubbling fluidized bed is that 1. The fluidization velocity in the boiling layer of the circulating fluidized bed is very high, generally 3 to 10 m/s, up to 10 m/s, and the fluidization velocity of the bubbling fluidized bed boiler is 1 to 3 m/s.
7. Combustion equipment of pulverized coal boiler: The coal is first ground by coal grinding equipment and then sprayed into the furnace for combustion. The entire combustion process is carried out in a suspended state in the furnace. This type of boiler is called a pulverized coal furnace. Its characteristics can improve the mixing with air, speed up the ignition box and combustion, and the coal type is widely applicable, suitable for large and medium-sized boilers. The combustion equipment of pulverized coal boilers includes pulverized coal equipment, pulverizing system and pulverized coal burner.
8. Oil burner: It consists of a fuel nozzle and an air regulator; it is a combustion equipment that atomizes the fuel oil and sends it into the furnace after strong mixing with air, so that the oil-gas mixture is suspended in the furnace. Oil burners are key equipment for oil boilers. According to the type of fuel used, they can be divided into light oil burners and heavy oil burners. Heavy oil has a large viscosity, and a preheater is generally set in the heavy oil burner. Most industrial oil boilers are equipped with light oil burners.
9. Gas burner: It is the most important combustion equipment for gas boilers. Gas burners include diffusion burners, atmospheric burners and fully premixed burners.