CN2296451Y

CN2296451Y - Mixed coal power combustor

Info

Publication number: CN2296451Y
Application number: CN 97214077
Authority: CN
Inventors: 王永刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-12
Filing date: 1997-04-12
Publication date: 1998-11-04
Anticipated expiration: 2007-04-12

Abstract

The utility model relates to a mixed coal power combustor used for mixing coal powder burnt in an industrial furnace. An outlet of a primary air pipe is arranged in a secondary air expanding conical pipe in a furnace wall, an air outlet of a single scroll cyclone sheathed on the primary air pipe is communicated with an annular passage, an impeller cyclone which is provided with a pull rod and is sheathed on the primary air pipe is positioned at the annular passage, and the inner part of the primary air pipe is provided with a flame holder with a regulating rod. The single scroll cyclone and the impeller type cyclone are combined into a whole in the utility model, the rotational flow strength of secondary air and the ejected field angle of coal powder flow of primary air can be regulated, the coal powder and the secondary air can be uniformly mixed, the coal powder combustion is uniform, and the coking phenomenon can not occur in the furnace.

Description

Hybrid coal burner

The utility model relates to the coal burner of Industrial Stoves, boiler combustion coal dust, particularly hybrid coal burner.

At present, coal-dust combustion device generally is that coal dust and combustion air mixing are sprayed into the stove internal combustion, but, because it is poor to regulate load-bearing capacity, coal dust mixes inhomogeneous with combustion air, it all is to carry out eddy flow outside stove that secondary wind produces eddy flow by spiral case, and eddy flow loses greatly and subtracts when entering furnace wall, coal dust firing is insufficient, easily coking in the burner hearth.

The purpose of this utility model is to provide a kind of hybrid coal burner, single spiral case cyclone and vane type cyclone are combined as a whole, make secondary wind eddy flow in furnace wall, subtended angle in the time of can also regulating the swirl strength of secondary wind and regulate a wind pulverized coal flow ejection, coal dust and secondary wind are mixed, coal dust firing is abundant, is difficult for coking in the burner hearth.

The utility model is achieved in that a kind of hybrid coal burner, comprise airduct one time, single spiral case cyclone and impeller cyclone, the outlet of an airduct is installed in the secondary wind reamer pipe in the furnace wall, the air outlet that is sleeved on a single spiral case cyclone on the airduct communicates with the circular passage that secondary wind reamer pore forms with an airduct, being sleeved on impeller cyclone on the airduct is positioned on the circular passage that airduct and secondary wind reamer pore form, affixed the pull bar that has draw ring on the impeller cyclone, the wind reamer is installed on the air outlet of an airduct one time, in an airduct, the flame holder that has adjusting rod is installed with an airduct dead in line, the screwed end of adjusting rod matches with the hold-down nut that is fixed on an airduct bend part, the screwed termination of adjusting rod is equipped with handwheel, and the other end of adjusting rod is supported on adjusting rod in airduct by being installed in support in the airduct.

The course of work of the present utility model is: the certain density wind pulverized coal flow of sending here from pulverized coal preparation system that has is sent to the burner hearth burning through the air outlet of an airduct, secondary wind passes through the impeller cyclone again through the swirling eddy that single spiral case cyclone produces, make secondary wind enter the swirling eddy that behind the furnace wall funeral is subtracted and increased certain spin intensity again, can regulate impeller cyclone position in the secondary wind reamer hole in furnace wall by pull bar, make secondary wind have suitable spin intensity, form process of coal combustion and need aerodynamic field, the coal dust of burning is mixed strongly with secondary wind, promote that coal dust fully burns, flame holder in airduct is regulated and can be moved forward and backward by handwheel, to regulate the subtended angle of a wind pulverized coal flow ejection, work to regulate flame, because coal dust and secondary wind mix, coal dust firing is abundant, is difficult for coking in the burner hearth.

Fig. 1 is a side view of the present utility model, and Fig. 2 is an A-A cutaway view of the present utility model, and Fig. 3 is an impeller cyclone front view, and Fig. 4 is that impeller cyclone inner core launches the blade distribution schematic diagram.Below in conjunction with accompanying drawing the utility model is further described, a kind of hybrid coal burner, comprise an airduct (4), single spiral case cyclone (6) and impeller cyclone (9), the outlet of an airduct (4) is installed in the secondary wind reamer pipe (8) in the furnace wall (7), the cylindrical tube that the taper seat of the mouth of pipe that secondary wind reamer pipe (8) constitutes for refractory material expands outwardly, the air outlet that is sleeved on the single spiral case cyclone (6) on the airduct (4) communicates with the circular passage that secondary reamer pipe (8) hole forms with an airduct (4), being sleeved on vane swirler (9) on the airduct (4) is positioned on the circular passage that airduct and secondary wind reamer pore (8) form, impeller cyclone (9) is slidingly matched with an airduct (4), impeller cyclone (9) is affixed the uniform guide vane of distorted shape in the shape of a spiral vertically between columnar inner core and urceolus, guide vane is 5～8, go up affixed the pull bar (5) that has draw ring at impeller cyclone (9), a wind reamer (10) is installed on the air outlet of an airduct (4), a wind reamer (10) is provided with connecting bushing for afterbody, it is horn-like that head expands outwardly, in an airduct (4), the flame holder (12) that has adjusting rod (3) is installed with an airduct (4) dead in line, flame holder (12) is provided with connecting bushing for afterbody, head is a truncated cone, the screwed end of adjusting rod (3) matches with the hold-down nut (2) that is fixed on an airduct (4) bend part, the screwed termination of adjusting rod (3) is equipped with handwheel (1), the other end of adjusting rod (3) is supported on adjusting rod (3) in the airduct (4) by the support (11) that is installed in the airduct (4), support (11) is for having the sleeve pipe of cross supporting leg, and sleeve pipe and adjusting rod (3) are slidingly matched.

Claims

1, a kind of hybrid coal burner, comprise an airduct (4), single spiral case cyclone (6) and impeller cyclone (9), the outlet that it is characterized in that an airduct (4) is installed in the secondary wind reamer pipe (8) in the furnace wall (7), the air outlet that is sleeved on the single spiral case cyclone (6) on the airduct (4) communicates with the circular passage that secondary reamer pipe (8) forms with an airduct (4), being sleeved on vane swirler (9) on the airduct (4) is positioned on the circular passage that airduct and secondary wind reamer pipe (8) hole form, go up affixed the pull bar (5) that has draw ring at impeller cyclone (9), in an airduct (4), the flame holder (12) that has adjusting rod (3) is installed with an airduct (4) dead in line, the screwed end of adjusting rod (3) matches with the hold-down nut (2) that is fixed on an airduct (4) bend part, and the other end of adjusting rod (3) is supported on adjusting rod (3) in the airduct (4) by the support (11) that is installed in the airduct (4).

2, coal burner according to claim 1 is characterized in that the cylindrical tube that the taper seat of the mouth of pipe that secondary wind reamer pipe (8) constitutes for refractory material expands outwardly.

3, coal burner according to claim 1 is characterized in that impeller cyclone (9) is affixed the uniform guide vane of distorted shape in the shape of a spiral vertically between columnar inner core and urceolus, and guide vane is 5～8.

4, coal burner according to claim 1 is characterized in that a wind reamer (10) for afterbody is provided with connecting bushing, and it is horn-like that head expands outwardly.

5, coal burner according to claim 1 is characterized in that flame holder (12) for afterbody is provided with connecting bushing, and head is a truncated cone.

6, coal burner according to claim 1 is characterized in that support (11) for having the sleeve pipe of cross supporting leg, and sleeve pipe and adjusting rod (3) are slidingly matched.