CN2447708Y

CN2447708Y - Gas device for use in lime kiln

Info

Publication number: CN2447708Y
Application number: CN 00258535
Authority: CN
Inventors: 卢成福
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-11
Filing date: 2000-10-11
Publication date: 2001-09-12
Anticipated expiration: 2010-10-11

Abstract

The utility model relates to a gas device for a lime kiln. The utility model is a device which uses combustible gas, especially residual coal gas generated by iron smelting furnaces, coke furnaces, etc., to fire lime. The utility model is suitable for various lime kilns. The utility model is provided with a gas conduit (1), wherein the gas conduit is connected with a gas transmission pipeline (2), and one end of the gas conduit is provided with a gas nozzle (3). The gas nozzle is positioned in a cavity of a lime kiln. The utility model can use the residual coal gas generated by the iron smelting furnaces, the coke furnaces, etc., to fire the lime. The pollution of the residual coal gas for air and the destruction of the residual coal gas for ozone layers can be avoided. Simultaneously, the impurity content of the lime can be decreased, and the lime quality can be improved.

Description

The limekiln gas combustion apparatus

The utility model relates to a kind of limekiln gas combustion apparatus, is to utilize particularly a kind of device of the residual gas lime calcining of generation such as iron-smelting furnace, coke oven of combustible gas, is applicable to various limekilns.

At present, many middle-size and small-size iron-smelting furnaces, coke oven etc. can produce a large amount of residual gas of discharging in process of production, the discharging of this coal gas is contaminated air not only, causes staff's the work under bad environment and the waste of the energy, simultaneously atmospheric ozone layer is had very big destruction.Because the environmental protection policy of country, some enterprise utilizes the residual gas retracting device that these residual gas are reclaimed, but the coal gas of retrieving often can not find suitable purposes, finally still is wasted or emits.In addition, the limekiln of lime calcining generally all adopts coal to act as a fuel at present, and the lime impurity content of firing like this is higher, is unfavorable for improving the quality of lime.

The purpose of this utility model provides a kind of limekiln gas combustion apparatus, utilize this device, the limekiln can be with the combustible gas residual gas of generation such as iron-smelting furnace, the coke oven lime calcining that acts as a fuel particularly, thereby can reduce the pollution of this residual gas to air, improves the quality of lime.

The purpose of utility model is to realize according to following dual mode for same design.

One, limekiln gas combustion apparatus has a gas conduct pipe, and gas conduct pipe is connected with fuel gas transportation pipeline, and one of gas conduct pipe is provided with gas nozzle, and gas nozzle is positioned at the chamber in limekiln.This mode is applicable to various middle-size and small-size limekilns.

Two, limekiln gas combustion apparatus, a gas conduct pipe is arranged, one of gas conduct pipe is provided with gas nozzle, gas nozzle is positioned at the chamber in limekiln, also has an annular stack furnace pipe that is fixed on the periphery, limekiln simultaneously, and the stack furnace pipe is provided with steam vent, have on the wall in limekiln and the corresponding passage of steam vent, between steam vent and the passage air jet pipe is set, connects by tube connector between stack furnace pipe and the gas conduct pipe, stack furnace pipe or gas conduct pipe are connected with fuel gas transportation pipeline.This mode is applicable to various big-and-middle-sized limekilns.

After adding the calcium carbonate stone from the charge door in limekiln in kiln, can kiln temperature be risen earlier with other fuel preheating, send into combustible gas by conveyance conduit in gas conduct pipe and stack furnace pipe then, combustible gas sprays in the kiln chamber from nozzle and air jet pipe.Combustible gas promptly burns after running into high temperature air, and air enters the kiln chamber from the Dump gate of kiln bottom.Also can be at the directly some coal gas of back of supplying gas.The high temperature that the combustible gas burning produces makes stone be decomposed into quick lime, and gas reforming becomes carbon dioxide to discharge simultaneously.

The limekiln gas combustion apparatus that the utility model provides, following advantage is arranged: 1, adopt this device, the residual gas lime calcining that can utilize iron-smelting furnace, coke oven etc. to produce, the lime of firing can be used for ironmaking or coking again, not only can improve the utilization rate of coal, energy savings can also reduce the production cost of ironmaking, coking enterprise, the particularly important is, can avoid this residual gas to the pollution of air with to the destruction of ozone layer.2, adopt this device, use the combustible gas lime calcining, and compare with the coal lime calcining, can significantly reduce the impurity content of lime, improve the quality of lime, this is owing to contain a large amount of impurity in the coal, and impurity content is seldom in the combustible gas.3, adopt this device, use the combustible gas lime calcining, and compare with the coal lime calcining, more safe and reliable, can reduce working strength of workers.4, this apparatus structure is simple, and is easy for installation, and applicability is strong, applies easily.

Below in conjunction with accompanying drawing the utility model is described in detail.

Accompanying drawing 1 is the schematic diagram when being installed on the limekiln according to the limekiln gas combustion apparatus that the utility model provides, accompanying drawing 2 is schematic diagrames of the gas conduct pipe of the limekiln gas combustion apparatus that provides according to the utility model, and accompanying drawing 3 is schematic diagrames of the annular stack furnace pipe of the limekiln gas combustion apparatus that provides according to the utility model.

Limekiln gas combustion apparatus shown in attached Fig. 1 and 2 has a gas conduct pipe (1), and gas conduct pipe is connected with fuel gas transportation pipeline (2), and one of gas conduct pipe is provided with gas nozzle (3), and gas nozzle is positioned at the chamber in limekiln.

Shown in attached Fig. 1 and 2, from horizontal direction, gas nozzle (3) is positioned at the middle part in limekiln, and from vertical direction, between gas nozzle (3) and the limekiln fire bars (4) is apart from high 15%-30% between kiln top, limekiln and the fire bars (4) apart from height.The height that pushes up between the fire bars as kiln is 7 meters, and then nozzle is between the fire bars being 2 meters apart from height.

Shown in attached Fig. 1 and 2, one of gas conduct pipe (1) is provided with gas spray head (5), and gas nozzle (3) is located on the shower nozzle, shower nozzle is provided with the nozzle that jet direction makes progress, this nozzle can have 1-3, also is provided with jet direction nozzle in the horizontal direction, and this nozzle can have 4-10.

Shown in attached Fig. 1 and 2, gas conduct pipe or with conveyance conduit that gas conduct pipe is connected on one-way cock (6) is set, as check-valves is set, can prevent the refluence of combustible gas when air pressure is not enough.

Shown in attached Fig. 1 and 2, gas conduct pipe (1) is a bend pipe, installs from the bottom in limekiln.Can reduce the trouble of installation like this.

Limekiln gas combustion apparatus shown in accompanying

drawing

1,2 and 3, a gas conduct pipe (1) is arranged, one of gas conduct pipe is provided with gas nozzle (3), gas nozzle is positioned at the chamber in limekiln, also has an annular stack furnace pipe (7) that is fixed on the periphery, limekiln simultaneously, the stack furnace pipe is provided with steam vent (8), have on the wall in limekiln (11) and the corresponding passage of steam vent, air jet pipe (9) is set between steam vent and the passage, connect by tube connector (10) between stack furnace pipe and the gas conduct pipe, stack furnace pipe or gas conduct pipe are connected with fuel gas transportation pipeline (2).

Shown in accompanying

drawing

1,2 and 3, between the nozzle of air jet pipe (9) and the limekiln fire bars is apart from high 15%-30% between kiln top, limekiln and the fire bars apart from height.Generally speaking, should approximately be on the same horizontal plane with the nozzle of gas conduct pipe.Steam vent can be provided with 4-10.

Shown in accompanying

drawing

1,2 and 3, gas conduct pipe or with conveyance conduit that gas conduct pipe is connected on one-way cock (6) is set.

Need to prove, second kind of gas combustion apparatus shown in the accompanying

drawing

1,2 and 3, except that having increased stack furnace pipe and corresponding structure, the structure of first kind of gas combustion apparatus shown in other structure and attached Fig. 1 and 2 is same or similar.

Should be noted in the discussion above that the flow area sum of all nozzles and air jet pipe is not more than the interior cross-sectional area of conveyance conduit (2).

Claims

1, a kind of limekiln gas combustion apparatus, it is characterized in that: a gas conduct pipe (1) is arranged, and gas conduct pipe is connected with fuel gas transportation pipeline (2), and one of gas conduct pipe is provided with gas nozzle (3), and gas nozzle is positioned at the chamber in limekiln.

2, by the described gas combustion apparatus of claim 1, it is characterized in that: from horizontal direction, gas nozzle is positioned at the middle part in limekiln, and from vertical direction, the distance between gas nozzle (3) and the limekiln fire bars (4) is apart from high 15%-30% between kiln top, limekiln and the fire bars (4).

3, by claim 1 or 2 described gas combustion apparatus, it is characterized in that: one of gas conduct pipe (1) is provided with gas spray head (5), gas nozzle (3) is located on the shower nozzle, and shower nozzle is provided with the nozzle that jet direction makes progress, and also is provided with jet direction nozzle in the horizontal direction.

4,, it is characterized in that by claim 1 or 2 described gas combustion apparatus: gas conduct pipe or with conveyance conduit that gas conduct pipe is connected on one-way cock (6) is set.

5, a kind of limekiln gas combustion apparatus, it is characterized in that: a gas conduct pipe (1) is arranged, one of gas conduct pipe is provided with gas nozzle (3), gas nozzle is positioned at the chamber in limekiln, also has an annular stack furnace pipe (7) that is fixed on the periphery, limekiln simultaneously, the stack furnace pipe is provided with steam vent (8), have on the wall in limekiln (11) and the corresponding passage of steam vent, air jet pipe (9) is set between steam vent and the passage, connect by tube connector (10) between stack furnace pipe and the gas conduct pipe, stack furnace pipe or gas conduct pipe are connected with fuel gas transportation pipeline (2).

6, by the described gas combustion apparatus of claim 5, it is characterized in that: between the nozzle of air jet pipe and the limekiln fire bars (4) is apart from high 15%-30% between kiln top, limekiln and the fire bars apart from height.

7,, it is characterized in that by claim 5 or 6 described gas combustion apparatus: gas conduct pipe or with conveyance conduit that gas conduct pipe is connected on one-way cock (6) is set.