CN2531246Y

CN2531246Y - Plug-in plate type adjustable cyclone coal burner

Info

Publication number: CN2531246Y
Application number: CN 01277000
Authority: CN
Inventors: 薛碧; 蔡茂盛; 王忠玉; 孙瑞清; 候长荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-19
Filing date: 2001-12-19
Publication date: 2003-01-15
Anticipated expiration: 2011-12-19

Abstract

The utility model relates to a novel pulverized coal burner. The periphery of the combustion chamber of the burner is provided with a secondary wind tube, the inner layer of the secondary wind tube is refractory. A plurality of groups of secondary air ducts are arranged in the refractory, every group of secondary air ducts is composed of a straight tube and a bent tube with a same aperture. The entrance of each of the secondary wind ducts is provided with a sliding inserted plate, the inserted plate is provided with round holes corresponding to the secondary wind ducts. The hand-wheel on the top end of the burner is rotated to drive the inserted plate to move back and forth, and thus the wind quantities of a secondary wind respectively entering the straight tube and the bent tube of the secondary wind duct can be changed, the angle of the secondary wind entering the combustion chamber can be changed, therefore the aim of stable ignition and combustion is obtained.

Description

The adjustable vortex burner of board plug type

A kind of new coal powder burner

Present vortex burner mainly is: the adjustable vortex burner of the MFP of Changshu Nozzle Factory Energy-saving Center, Ministry of Matallurgical Industry development and production.This burner has a lot of significant disadvantages:

1, " before the igniting, uses other combustion system furnace temperature is heated to 600 ℃ ", could put coal dust firing then.Furnace temperature is heated to 600 ℃, under the heat absorption of water-cooling wall, easier said than done.This needs a large amount of ignition oils.The special boiler that combustion is fired, stopped for needs, the provisions spending is difficult to bear especially.

2, this burner combustion furnace temperature is low, therefore, can only burn the volatile matter height, the high fat coal of card number, and for low volatile, the colm that the card number is low is difficult to burning.Therefore, when boiler load is low, or during the ature of coal variation, be difficult to guarantee stable the catching fire, burn of boiler;

Purpose of the present invention: a kind of a large amount of ignition oils that do not need will be provided exactly, just be easy to light the burner of coal dust.Simultaneously, also be that a kind of energy burns multiple coal, and guarantee to catch fire combustion stablized burner.

The present invention is achieved by the following technical solutions: the band small combustion chamber the cylinder type burner, openend links to each other with the burner hearth dead ahead, the other end (top) center is provided with airduct one time, the airduct center be provided with can front and back push-and-pull bluff body.The combustion chamber periphery of burner is established the secondary air duct, and secondary air duct nexine is a refractory material, is provided with the equidistant secondary air channel of many groups in refractory material, and every group of secondary air channel is all by forming with bore straight tube and bend pipe.The secondary air channel porch, be provided with slidably plate, plate is provided with the circular hole that is complementary with the secondary air channel bore, rotation is located at the handwheel of burner tip, the drive plate moves forward and backward, change secondary wind enter straight tube and bend pipe in the secondary air channel air quantity what, reach and change the purpose that secondary wind enters combustion chamber wind direction angle.

This board plug type turbulent burner has following advantage:

1, its sufficient combustion, burning velocity are fast, and it is strong to add heating power, thermal efficiency height, and energy-saving effect is remarkable, and coal consumption low (with lump coal layer combustion ratio, economize on coal 25%---30%) is simultaneously simple to operate, easy to maintenance.

2, it saves ignition oil.During igniting, light small combustion chamber earlier, because the small combustion chamber space is little, do not have the water-cooling wall heat absorption again, so it is very fast to heat up, very short time just can be thrown coal dust firing, thereby all can save a large amount of ignition oils at every turn;

3, the adaptation coal is wide, catches fire and flameholding.During burning, small combustion chamber moves with boiler furnace.When boiler load step-down or ature of coal become bad, occur catching fire, unstable combustion regularly, small combustion chamber utilizes self high temperature, can be coal dust burning hot source is provided, and keeps stable ignition, the burning of coal dust.If when also unstable, adjustable primary wind bluff body, air quantity and secondary wind swing angle, air quantity reach stable the catching fire and the purpose of burning of assurance;

4, because secondary wind is introduced into the burner urceolus, this had both cooled off burner housing, simultaneously, had also reclaimed heat energy, for secondary wind has added temperature.The secondary wind of preheating enters the combustion chamber more like this, to the burner stable ignition, the burning more favourable.

Description of drawings: Fig. 1 is a board plug type vortex burner side cross-sectional view.The pull bar (8) of an airduct (1), bluff body (2), small combustion chamber (3), overfire air fan (4), secondary air duct (5), secondary air channel (6), boiler furnace (7), bluff body, secondary wind are adjusted handwheel (9), overfiren air port plate (10), refractory material (11), boiler wall (12).Fig. 2 is Fig. 1 I--I cutaway view.Fig. 3 is the adjustable schematic diagram of Fig. 1 secondary wind.

Below in conjunction with the accompanying drawing illustrated embodiment, the utility model is described further: one time the wind band coal dust, by an airduct (1), be blown into combustion chamber (3) all around at bluff body (2), secondary wind blows into the secondary air duct (5) of burner periphery by air blast (4), blows into combustion chamber (3) by secondary air channel (6) again and participates in burning.High temperature swirl flame band flue gas and coal dust and is entered boiler furnace (7) and burn away.When low or ature of coal has change when boiler load, rely on the burning hot source of the high-temp combustion (more than 1500 ℃) of burner on the one hand, keep boiler stable ignition, burning.If also be not enough to stablize boiler fire burns, when can suitably adjust first and second air quantity, adjust bluff body (2) front and back position by bluff body pull bar (8), change torch shape, ignition distance, and the plate (10) of adjustment secondary wind handwheel (9) push-and-pull secondary air channel (6) inlet, secondary wind is cooperated with a wind facies, reach stable ignition, the purpose of burning.

Be fixed on refractory material (11) lining about secondary air channel (6), how to change the wind direction that enters combustion chamber (3)? its principle is such, please see Figure 3, last figure, and AB is the vertical view of secondary air channel (6) import plate (10), black circle is circular hole; Middle graph, when the DE of circular hole in secondary air channel managed, secondary wind was vertically to enter combustion chamber (3); Figure below is when CD in secondary air channel (6) of the circular hole of plate (10), because of CD is a bend pipe, combustion chamber (3) are oblique so secondary wind blows into, as shown in the figure, when plate (10) slowly moves right, just circular hole is slowly moved to the DE direction by CD, secondary wind enters the direction of combustion chamber (3), also, slowly move to the F direction by the G direction, otherwise, also can move the principle of adjustable secondary wind direction that Here it is by the F direction to the G direction.

Claims

A kind of new coal powder burner, it is characterized in that: the combustion chamber periphery of burner is provided with secondary air duct (5), secondary air duct nexine is refractory material (11), in refractory material, be provided with many group secondary air channels (6), every group of secondary air channel (6) all is made up of straight tube and bend pipe with bore, secondary air channel (6) porch, be provided with slidably plate (10), plate is provided with the circular hole that is complementary with secondary air channel (6), rotation is located at the handwheel (9) of burner tip, drive plate (10), move forward and backward, change secondary wind enter secondary air channel (6) straight tube and bend pipe air quantity what.