The pulverized-coal fired boiler high efficient combustion device
The utility model relates to a kind of burner, particularly about a kind of coal powder burner that is suitable for using in small and medium-sized industrial coal powder boilers.
Existing middle-size and small-size industry coal-boiler all adopts traditional burner as grate firing boiler, reciprocating boiler, chain furnace etc., and these all traditional burner be not suitable for combusting coal fines.Be used at present the coal powder burner of station boiler, its volume structure generally is only applicable to the huge station boiler of burner hearth and uses, and can not be directly used in small and medium-sized industrial coal powder boilers.Therefore, the coal powder burner of a kind of suitable small and medium-sized industrial coal powder boilers use of development is very necessary.
The utility model content
The purpose of this utility model is to provide a kind of coal powder burner of suitable small and medium-sized industrial coal powder boilers use.
The technical scheme that the utility model is taked is:
A kind of pulverized-coal fired boiler high efficient combustion device, it comprises nozzle component, Secondary Air blade assembly, igniter, cover cylinder and servicing unit; It is characterized in that:
Described igniter is arranged at the side of nozzle component, and is in Secondary Air blade assembly center;
Within described Secondary Air blade assembly is arranged at the cover cylinder;
The jet pipe length of described nozzle component is 2000-2200mm, and is provided with blast cap before nozzle component, makes it increase the backflow blowback.
Described Secondary Air blade assembly is provided with 18 helical blade assemblies that swing flexibly, regulates by the swing of helical blade assembly air quantity and the angle that Secondary Air enters.
When the utility model is installed, jet pipe is connected to the coal dust carrier pipe with air pressure, the Secondary Air blade assembly is connected to pressure air or blower fan, and burner outer cover of the present utility model and cover cylinder are inserted together and be connected on the precombustion chamber of Horizontal industrial coal dust boiler device.
When the utility model uses, at first start gas (oil) pump, with the nozzle ejection of fuel oil by gas (oil) pipe, and lighted by ignitor.By after being lighted for 10 seconds, open a pressure fan and drive coal dust and sprayed by jet pipe, and the combustion gas of having been burnt lights, open simultaneously Secondary Air and promote coal dust firing.Lighted and after 10 seconds, closed air pump with the fuel oil cofiring at coal dust, being cut off combustion gas, fully by coal dust firing.Can change the air quantity ratio of wind, Secondary Air in the fired coal combustion process, also can change flame at the burning position of pulverized-coal fired boiler precombustion chamber, make the position of flame combustion fully adjustable.The flame of coal dust firing can spray into the flame rotation depths of boiler precombustion chamber under the promotion of a wind that rotates into, Secondary Air, reach the purpose of rotation, steady combustion.
Because coal dust enters precombustion chamber by nozzle component, be added with a blast cap before its jet pipe, make coal dust knock blast cap in the blast cap exit and rebound, then be blown into the precombustion chamber surrounding by the Secondary Air by blade and evenly spray, make the ejection coal dust more even.
Enter because Secondary Air prolongs tangential tilt by vane group, prolong direction blade and advance in the shape of a spiral, strengthened the rotate effect of air-out.Vane group is comprised of 18 helical blades, and its magnitude setting and eddy flow angle can arrange according to demand, the flame that enters the boiler precombustion chamber is become revolve flame, and effectively elongate the length of revolving flame, makes burning more fully, evenly.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the blade assembly schematic diagram;
Fig. 3 is the nozzle component schematic diagram.
Marginal data, 1-covers cylinder, 2-Secondary Air blade assembly, 3-igniter, 4-nozzle component, 5-precombustion chamber, 6-blast cap, 7-helical blade, 8-blast cap head, 9-blast cap pipe.
The specific embodiment
As shown in Figure 1, a kind of pulverized-coal fired boiler high efficient combustion device, it comprises nozzle component 4, Secondary Air blade assembly 2, igniter 3, exterior cover pipeline 1 and servicing unit; Wherein:
Described igniter 3 is arranged at the side of nozzle component 4, and is in Secondary Air blade assembly 2 centers;
Within described Secondary Air blade assembly 2 is arranged at exterior cover pipeline 1;
The jet pipe length of described nozzle component 4 is 2000-2200mm, and is provided with blast cap 6 before nozzle component 4, makes it increase the backflow blowback.The structure of blast cap 6 as shown in Figure 3, it is that a blast cap head 8 is installed on blast cap pipe 9, the section configuration of blast cap head 8 is that a conical surface is arranged.
Described Secondary Air blade assembly 2 as shown in Figure 2, it is provided with 18 helical blades 7, and helical blade 7 can swing flexibly, air quantity and angle that its adjustable second wind is entered.
When the utility model is installed, nozzle component 4 is connected to the coal dust carrier pipe with air pressure, Secondary Air blade assembly 2 is connected to pressure air or blower fan, and burner outer cover of the present utility model and cover cylinder 1 are inserted together and be connected on the precombustion chamber of Horizontal industrial coal dust boiler device.