CN204880121U - Gas calcined lime shaft kiln ignition - Google Patents

Abstract

The utility model relates to an ignition device for a gas-fired lime shaft kiln, which comprises 2 to 8 combined igniters, the combined igniter is connected to the ignition gas bottle and a portable ignition control box at both ends respectively through a gas transmission hose and a high-voltage cable. The combined igniter includes a pilot gas sleeve that runs through the left and right ends of the combined igniter. One end of the burner is connected to the ignition gas bottle through the gas delivery hose, and a flame peeping tube is arranged above the piloting gas sleeve at this end, and one end of the flame peeping tube is fixed on the integrated end cover outside the sleeve type burner in the lower row. Process gas openings and combustion-supporting air openings are arranged sequentially from the end of the sleeve type burner in the lower row to the other end, and a high-energy ignition gun is arranged at the end of the pilot gas casing at the other end. It has obvious technical and economic advantages such as simple ignition operation process, safety and reliability, short time, low labor intensity of workers, low energy consumption, and little environmental pollution.

Description

Ignition device for gas fired lime shaft kiln

technical field

The utility model belongs to the technical field of gas-fired kilns, and relates to an ignition device for a gas-fired lime vertical kiln.

Background technique

Peripheral burner-type gas fuel lime shaft kiln (hereinafter referred to as gas-fired kiln) can use low calorific value pure blast furnace gas, and the one-time furnace life of the kiln is longer than that of rotary kiln, sleeve kiln, and parallel flow regenerative double-chamber kiln. It is still one of the main kiln types for the iron and steel industry to produce metallurgical lime due to its advantages of high operating rate, low operating cost, and small investment per ton of product.

The working principle of the gas-fired kiln is to add limestone with a certain size from the top of the kiln. Due to the action of gravity, the material moves from top to bottom, and the calcined lime is discharged from the ash discharge machine at the bottom of the kiln. The required air (primary combustion air) is sprayed into the kiln from the middle of the kiln, and the material and gas flow relatively in the vertical kiln. The material falls from the top and the gas goes from the bottom to the top, so it is a counter-flow heat exchange device.

The building height of the gas-fired kiln is about 35m, the effective height is about 22m, and the inner diameter is 2-4m. There are two rows of burners in the middle and lower part of the kiln body, and each row is equipped with 10 sleeves evenly arranged along the periphery of the kiln body. Type burners, the angle between two adjacent burners in the same row is 36°, and the staggered angle between two adjacent burners in the upper and lower rows is 18°. Fuel gas and primary combustion-supporting air are sprayed into the kiln through 20 sleeve-type burners evenly arranged in the gas ring pipe and air ring pipe around the kiln body, and the fuel gas and combustion-supporting air enter the kiln for mixing and combustion. The flame decomposes the limestone by roasting.

When starting a gas-fired kiln with new masonry or long-term shutdown and cooling, a large amount of soft and hard wood, a small amount of waste diesel oil, waste cotton yarn and other fire-igniting materials need to be transported to the ignition platform above the upper row of burners; Put 6-8 tons of coke into the kiln bottom 200-300mm above the hood of the ash discharger (to protect the ash discharger), then load 15-20 tons of limestone; then add 100-150kg of softwood from the calcination belt manhole at the ignition platform , 500-700kg of hardwood, and then add 50-100kg of softwood and a small amount of waste cotton yarn; pour 20-25kg of waste diesel oil on the bottom firewood, put the lit torch into the furnace through the manhole, and wait until the fire is hot. Manually put in 500-700kg of hardwood, add 300-500kg of bottom coke, and start adding limestone and coke after it burns normally for 10-20 minutes. The ratio is to add 80-100kg of coke per 1000kg of limestone, and the coke particle size is 25-40mm; Feed to the upper row of burners 5-6 meters away, remove coke and only add limestone; 10 minutes after the limestone at the lower row of burners is red hot or see an open flame, ignite with low-pressure gas (gas pressure 4000-5000Pa); gradually feed to the predetermined level , After the upper and lower rows of burners are all lit, the high-pressure gas can be introduced into the normal production stage.

It can be seen from the above that so far there is no special ignition device for gas-fired kilns, and the operation method of lime soil shaft kiln is used for the ignition of the furnace. environmental defects.

Utility model content

In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides an ignition device for a gas-fired lime shaft kiln, which can not only greatly shorten the ignition cycle, reduce the labor intensity of workers, and does not use soft and hard firewood and other ignition materials, nor does it use For the expensive and scarce coke, only a small amount of pilot gas cylinders can be used to complete the ignition operation of the process gas of the gas firing kiln, and the dusty flue gas is discharged after purification .

The technical scheme adopted by the utility model to solve the technical problem is: an ignition device for a gas-fired lime vertical kiln, including 2 to 8 combined igniters arranged on the gas-fired kiln. The pipe and the high-voltage cable are respectively connected with the pilot gas bottle and the portable ignition control box at both ends. The combined igniter includes a pilot gas bushing that runs through the left and right ends of the combined igniter, and the pilot gas bushing is sleeved on a lower In the row of sleeve-type burners, one end of the pilot gas casing protruding from the lower row of sleeve-type burners is connected to the pilot gas bottle through a gas delivery hose, and a flame peeping tube is arranged above the pilot gas sleeve , one end of the flame peeping tube is fixed on the integrated end cover outside the lower row of sleeve burners. From the end of the lower row of sleeve burners to the other end, there are process gas openings and a combustion air opening in sequence. The end of the pilot gas casing is provided with a high-energy ignition gun.

Liquefied petroleum gas or acetylene gas is housed in the described ignition gas bottle.

A pilot gas electromagnetic valve is arranged at the place where the pilot gas sleeve pipe is connected with the gas delivery hose.

Several sleeve-type burners arranged neatly are installed on the gas-fired kiln, and the sleeve-type burners are divided into an upper row of sleeve-type burners and a lower row of sleeve-type burners according to different positions.

A combined igniter is socketed in the sleeve burners in the upper row and the sleeve burners in the lower row.

The beneficial effects of the utility model are: to end the long-term history of the gas-fired kiln using the traditional earth shaft kiln ignition method, that is, no longer use firewood, waste diesel oil, waste cotton yarn and coke (or lump coal) and other ignition materials, only need to use extremely A small amount of bottled pilot gas can be used to ignite the process gas to start the furnace and ignite the gas-fired kiln. This device is not only reusable, but also has the advantages of simple ignition operation process, safety and reliability, short time, low labor intensity of workers, low energy consumption, Significant technical and economic advantages such as less environmental pollution.

Description of drawings

Figure 1 is a schematic diagram of the sleeve burner arrangement of a gas fired kiln;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a structural schematic diagram of the combined igniter in the utility model.

In the figure: 1—upper sleeve burner, 2—lower sleeve burner, 3—ignition gas bottle, 4—air hose, 5—combined igniter, 6—high voltage cable, 7— Portable ignition control box, 8—flame peeping tube, 9—pilot gas solenoid valve, 10—integrated end cover, 11—pilot gas bushing, 12—high energy ignition gun.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Referring to Figures 1 to 3, an ignition device for a gas-fired lime shaft kiln includes 2 to 8 combined igniters 5 arranged on the gas-fired kiln. Nozzle, the telescopic burner is divided into the upper row of telescopic burner 1 and the lower row of telescopic burner 2 according to the different positions of the upper and lower rows, and the upper row of telescopic burner 1 and the lower row of telescopic burner 2 are all socketed with a combined igniter 5, the combined igniter 5 is connected with the ignition gas bottle 3 at both ends and the portable ignition control box 7 respectively through the gas transmission hose 4 and the high-voltage cable 6, and the ignition gas bottle 3 is installed There is liquefied petroleum gas or acetylene gas, wherein the combined igniter 5 includes a pilot gas sleeve 11 that runs through the left and right ends of the combined igniter 5, and the pilot gas sleeve 11 is socketed in a lower row of sleeve burners 2 Inside, one end of the igniting gas casing 11 protruding from the lower sleeve type burner 2 is connected to the igniting gas bottle 3 through the gas delivery hose 4, and a The ignition gas electromagnetic valve 9 is provided with a flame peeping tube 8 above the piloting gas sleeve 11 at this end, and one end of the flame peeping tube 8 is fixed on the integrated end cover 10 outside the sleeve type burner 2 of the lower row. Sleeve burner 2 is provided with process gas opening and a combustion-supporting air opening successively on this end to the other end, and then is provided with a high-energy ignition gun 12 at the end of the ignition gas sleeve pipe 11 at the other end.

The utility model ends the long-term history of using the traditional soil vertical kiln ignition method for gas-fired kilns, that is, firewood, waste diesel oil, waste cotton yarn, coke (or lump coal) and other ignition materials are no longer used, and only a small amount of bottled ignition gas is used. 3. The process gas can be ignited to start the furnace and ignite the gas-fired kiln. This device is not only reusable, but also has the advantages of simple ignition operation process, safety and reliability, short time, low labor intensity of workers, low energy consumption, and small environmental pollution. Significant technical and economic advantages.

Claims (5)

1. a gas combusting limestone kiln igniter, comprise 2 ~ 8 combined type igniters be arranged on gas burning kiln, it is characterized in that: this combined type igniter is connected with ignite fuel gas bottle and the portable IGNITION CONTROL case at two ends respectively by air hose and high-tension cable, wherein combined type igniter includes a gas sleeve of igniting through two ends, combined type igniter left and right, gas sleeve of igniting is arranged under being socketed in one in telescopic burner, one end that this gas sleeve of igniting stretches out the telescopic burner of lower row is connected with fuel gas bottle of igniting by air hose, a flame sighting tube is provided with above this end ignites gas sleeve, one end of flame sighting tube is fixed on the integrated end cap outside the telescopic burner of lower row, technique coal gas opening and a combustion air opening is disposed with from this end of the telescopic burner of lower row to the other end, a high-energy firing gun is then provided with in the termination of the gas sleeve of igniting of the other end.

2. gas combusting limestone kiln igniter as claimed in claim 1, is characterized in that: described in ignite fuel gas bottle built with liquefied petroleum gas or acetylene gas.

3. gas combusting limestone kiln igniter as claimed in claim 1, is characterized in that: described gas sleeve and the air hose connecting place of igniting is provided with a gas electromagnetic valve of igniting.

4. gas combusting limestone kiln igniter as claimed in claim 1, it is characterized in that: several the telescopic burners described gas burning kiln being assigned proper alignment, this telescopic burner is divided into the telescopic burner of upper row and the telescopic burner of lower row according to upper-lower position difference.

5. gas combusting limestone kiln igniter as claimed in claim 4, is characterized in that: arrange in telescopic burner and the telescopic burner of lower row on described and be all socketed with combined type igniter.