CN2121613U - Controlled eddy wind direct flow coal dust burner - Google Patents

Controlled eddy wind direct flow coal dust burner Download PDF

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Publication number
CN2121613U
CN2121613U CN 91231131 CN91231131U CN2121613U CN 2121613 U CN2121613 U CN 2121613U CN 91231131 CN91231131 CN 91231131 CN 91231131 U CN91231131 U CN 91231131U CN 2121613 U CN2121613 U CN 2121613U
Authority
CN
China
Prior art keywords
chamber
combustion chamber
coal dust
port
controlled
Prior art date
Application number
CN 91231131
Other languages
Chinese (zh)
Inventor
张珏成
王浩
Original Assignee
宁夏工学院
宁夏回族自治区银川环保设备厂
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁夏工学院, 宁夏回族自治区银川环保设备厂 filed Critical 宁夏工学院
Priority to CN 91231131 priority Critical patent/CN2121613U/en
Publication of CN2121613U publication Critical patent/CN2121613U/en

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Abstract

The utility model discloses a controlled eddy wind direct flow coal dust burner, which relates to a coal dust burner used for burning coal dust in various industrial furnaces. The utility model has a combustion chamber and the wall of the combustion chamber, wherein, a secondary air nozzle, a coal jetting spout and a triple air spout are ordinally and symmetrically arranged on the wall of the combustion chamber from the end part to the flame jetting spout, and the included angle of each part and the tangent of the combustion chamber wall is less than 90 DEG; a secondary air nozzle forms a conical table shape, and is also arranged on one end cover. The defects that the wall surface is burnt caused by unreasonable eddy flow organizing method; the furnace liner is easily burnt out, and the service life of the combustor is short are solved in existing combustor. The utility model has the advantages that the effect of energy saving is obvious; the requirements of the environmental protection is satisfied; the structure is simple; the cost is low. The controlled eddy wind direct flow coal dust burner can be used for various industrial furnaces.

Description

The utility model relates to a kind of pulverized fuel combustor, particularly can be used for a kind of powdered fuel burner of all types of industries kiln burning coal dust.
CN87214616 has announced the patent application that a kind of name is called cement rotary kiln band flameholder binary channels spiral coal powder burner, though it is complete at the three air channel coal powder injection pipes burning from external introduction, the unit-hour output height, but air-supply coal-supply system and this body structure more complicated, three layers of sleeve pipe concentric fits, and require axial location adjustable, therefore processing difficulties and coal powder injection pipe cost an arm and a leg, consumed power is many, the equipment investment height, apply the drawback of difficulty at home and provide that a kind of to have structure simpler than three-channel, invest the also corresponding coal burner that reduces, but still by interior, outer tunnel, clean wind collapsible tube, cyclone, compositions such as retractor device, structure are still complicated.
In existing same category of device, there is the manufacturing process complexity in addition equally, the cost height, the burner thermic load is big, cause too short problem of life-span, as the FKS burner of Shanghai second Industry Univ's exploitation, worked every day 8 hours, only can work 6-7 days, can not adapt to 24 continuous throughout the twenty-four hour24s, and energy-saving effect is not ideal enough.
The purpose of this utility model be to provide a kind of simple in structure, can reasonable distribution thermic load in the burner, improve the burner life-span, and the tangible coal burner of energy-saving effect.
The technical solution of the utility model be on chamber wall from the afterbody to the bocca successively symmetric arrangement overfiren air port, pci port, tertiary air orifice are arranged, its all with the angle of chamber wall tangent line less than 90 °, also be provided with at least 4 overfiren air ports on the combustor tail end cap, its distribution on end cap is frustum.
This programme is provided with the spiral wind band outside chamber wall.
The diameter of the bocca in this programme is by dwindling greatly gradually.
Distribution is the overfiren air port of frustum, can produce the backflow whirlpool when being input into secondary wind, by the air quantity of control overfiren air port, and the size that can regulate the backflow whirlpool, thus regulate the combustion position and the length of flame.Because overfiren air port, tertiary air orifice, pci port equal symmetric arrangement on chamber wall, and with the angle of chamber wall tangent line less than 90 °, rely on the interaction of jet to form potential vortex stream whirlwind.When carrying coal dust, a wind sprays in the combustion chamber, the swirling action that is subjected to secondary wind, tertiary air and itself constitutes, and mix the igniting after-combustion with air.High-temperature product after the burning enters the burner hearth of industrial furnace through bocca.
Advantage of the present utility model is:
1, enter the coal dust of combustion chamber, form in the interaction that relies on jet under the effect of potential vortex stream whirlwind, mix full and uniformly with air, and air content is adjustable, and coal dust can fully be burnt, and energy-saving effect is obvious;
2, secondary wind can produce the backflow whirlpool through the overfiren air port of frustum.Under the effect in backflow whirlpool, but the burning steady and continuous is carried out;
3, because the flow field is the potential vortex flow field, flow velocity reduces near the wall, thereby it is unreasonable to have solved existing burner eddy flow method for organizing, causes the wall burning, and air-flow is big to washing away of wall, the easy scorification of furnace lining, the problem that the burner life-span is short, this programme be through preliminary test, continuous operation 8 days, 24 hours every days, furnace lining scorification phenomenon does not appear yet;
4, by regulating overfiren air port, the air quantity of tertiary air orifice and the coal dust amount that sprays into, can the reasonable distribution burner in thermic load and enter thermic load amount in the industrial burner hearth;
5, chamber wall is provided with the spiral wind band outward, helps heat radiation, improves lining durability;
6, the design of convergent bocca reduces heat accumulation in the combustion chamber, is convenient to flame and goes out stream, reduces thermal loss;
7, satisfy environmental protection requirement, can be applicable to all types of industries stove, as steep colored alkali stove, forge furnace.
In conjunction with the embodiments this programme is further specified:
Accompanying drawing is a structural representation of the present utility model.
(1) is the combustion chamber among the figure, (2) be chamber wall, chamber wall (2) is constructed by refractory material and is formed, be provided with spiral wind band (3) outside chamber wall (2), spiral wind band (3) is welded by sheet metal, and (4) are pci ports, (5) be overfiren air port, (6) be tertiary air orifice, (7) are end caps, have 4 overfiren air ports (5) on the end cap (7) at least.As shown in the figure, the distribution of the overfiren air port on end cap (5) is frustum, overfiren air port (5), pci port (4), tertiary air orifice (6) is gone up symmetric arrangement at chamber wall (2), with the angle of chamber wall tangent line less than 90 °, and one angle is arranged with mode cross section, combustion chamber (1), the angular range of present embodiment is 5-30 °, (8) be bocca, the diameter of bocca (8) is by reducing greatly gradually, overfiren air port (5), pci port (4), (4) afterbody is arranged in order to bocca (8) tertiary air orifice (6) from the combustion chamber, what be connected with bocca (8) is all types of industries stove (9), industrial furnace in the present embodiment (9) is a forge furnace, (10) be Coal-disintegrating machine, (11) be blower fan, (12) are defeated coal pipes, and (13) are ventilation ducts, (14) be the valve of regulating air quantity, (15) are the air-supply pressurizer tanks.

Claims (3)

1, a kind of controlled whirlwind straight-through pulverized coal burner comprises combustion chamber (1), chamber wall (2), pci port (4), air port, and bocca (8), Coal-disintegrating machine (10), blower fan (11), defeated coal pipe (12), ventilation duct (13) is characterized in that:
A, combustion chamber (1) afterbody end cap (7) and chamber wall (2) are provided with overfiren air port (5), on end cap (7), have 4 overfiren air ports (5) at least, its distribution on end cap (7) is frustum, overfiren air port (5) symmetric arrangement on the chamber wall (2), with the angle of chamber wall (2) tangent line less than 90 °;
B, go up symmetric arrangement pci port (4), tertiary air orifice (6) at chamber wall (2), its all with the angle of chamber wall (2) tangent line less than 90 °;
(1) afterbody is arranged in order to bocca (8) from the combustion chamber for C, overfiren air port (5), pci port (4), tertiary air orifice (6).
2, controlled whirlwind straight-through pulverized coal burner according to claim 1 is characterized in that being provided with spiral wind band (3) outside chamber wall (2).
3, controlled whirlwind straight-through pulverized coal burner according to claim 1, the diameter that it is characterized in that above-mentioned bocca (8) is by dwindling greatly gradually.
CN 91231131 1991-12-19 1991-12-19 Controlled eddy wind direct flow coal dust burner CN2121613U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91231131 CN2121613U (en) 1991-12-19 1991-12-19 Controlled eddy wind direct flow coal dust burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91231131 CN2121613U (en) 1991-12-19 1991-12-19 Controlled eddy wind direct flow coal dust burner

Publications (1)

Publication Number Publication Date
CN2121613U true CN2121613U (en) 1992-11-11

Family

ID=4936380

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 91231131 CN2121613U (en) 1991-12-19 1991-12-19 Controlled eddy wind direct flow coal dust burner

Country Status (1)

Country Link
CN (1) CN2121613U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012022A (en) * 2010-11-29 2011-04-13 黄云生 Pulverized coal jetting and combusting mechanism
CN103727526A (en) * 2013-12-23 2014-04-16 惠建军 Vertical bidirectional blast injected pulverized-coal combustion furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012022A (en) * 2010-11-29 2011-04-13 黄云生 Pulverized coal jetting and combusting mechanism
CN102012022B (en) * 2010-11-29 2012-11-14 黄云生 Pulverized coal jetting and combusting mechanism
CN103727526A (en) * 2013-12-23 2014-04-16 惠建军 Vertical bidirectional blast injected pulverized-coal combustion furnace

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