CN212362017U

CN212362017U - Flame adjusting device for rotary kiln fuel device

Info

Publication number: CN212362017U
Application number: CN202020401037.6U
Authority: CN
Inventors: 张飞
Original assignee: Jiayuguan Dayou Jiamei Calcium Industry Co ltd
Current assignee: Jiayuguan Dayou Jiamei Calcium Industry Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2021-01-15
Anticipated expiration: 2030-03-26

Abstract

The utility model discloses a rotary kiln fuel ware flame adjusting device, including the fuel ware, this fuel ware is equipped with burning torch centre bore, central wind passageway, buggy passageway, coal gas passageway, axial compressor wind passageway from inside to outside in proper order, central wind passageway and buggy passageway are equipped with interior whirl wind passageway between the two, are equipped with outer whirl wind passageway between coal gas passageway and the axial compressor wind passageway. The utility model discloses be favorable to the effect of whirl wind including buggy and coal gas after mixing for the first time, carry out the second through outer whirl wind and mix, do benefit to the fuel and mix, increase the flame velocity of flow, promote the buggy range, the buggy abundant burning of the buggy of being convenient for reduces the heat consumption, and the adjustment of the fuel ware flame shape of being convenient for simultaneously is favorable to adjusting the burning rate according to the fuel condition, makes the more intensive mixing of fuel reach the complete combustion.

Description

Flame adjusting device for rotary kiln fuel device

Technical Field

The utility model belongs to the technical field of fuel ware adjustment control, a rotary kiln fuel ware is related to, concretely relates to rotary kiln fuel ware flame adjusting device.

Background

In the rotary kiln calcination process, the adopted fuels are solid fuel and gas fuel. In order to obtain the optimal combustion cost, a mode of blending a plurality of fuels together is often adopted for use; in the fuel use process, the fuel changes suddenly, the adjustment is not timely or too much or too little, the working condition of the rotary kiln is affected, the material quality is unstable, the product quality is affected, and the production cost is also affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a flame adjusting device of a rotary kiln fuel device.

The utility model adopts the technical scheme as follows: a flame adjusting device of a rotary kiln fuel device comprises a fuel device, wherein a central hole of an ignition gun, a central air channel, a coal powder channel, a coal gas channel and an axial flow air channel are sequentially arranged on the fuel device from inside to outside, an inner rotational flow air channel is arranged between the central air channel and the coal powder channel, and an outer rotational flow air channel is arranged between the coal gas channel and the axial flow air channel.

Preferably, the fuel device also comprises 2 variable-frequency Roots blowers which are used for independently supplying air to the inner air channel and the outer air channel of the fuel device respectively, wherein one variable-frequency Roots blower is communicated with the inner rotational flow air channel and the outer rotational flow air channel, and the other variable-frequency Roots blower is communicated with the axial flow air channel.

Furthermore, each air duct is provided with a flow meter and a wind pressure meter.

The beneficial effects of the utility model reside in that:

1. the utility model divides the inner air channel of the former five-channel fuel device into the inner rotational flow air channel and the outer rotational flow air channel, which is beneficial to mixing the coal powder and the coal gas for the first time under the action of the inner rotational flow air, and mixing the coal powder and the coal gas for the second time through the outer rotational flow air, thereby being beneficial to mixing the fuel, increasing the flame flow rate, improving the coal powder firing range, facilitating the full combustion of the coal powder and reducing the heat consumption; the shape of the flame of the fuel device is slender, so that the pulverized coal and the coal gas are fully mixed, the black fire head is short, and the combustion temperature is high; the long and thin flame raises the whole temperature in the kiln, which is beneficial to lime preheating and calcination, the local high temperature phenomenon does not exist, the ring formation period can be effectively prolonged, the kiln lining is protected, the flame shape is changed by adjusting the combustion-supporting air quantity of the fuel device in time, the position of the calcination zone is moved, the formed temperature difference change range is large, and the ring formation can be processed on line.

2. The utility model discloses be equipped with 2 frequency conversion roots blower, utilize 2 frequency conversion roots blower to control axial flow wind, central wind and inside and outside whirl wind respectively, compare with current fuel ware, stabilize the air feed wind pressure of combustion-supporting wind, the adjustment of the fuel ware flame shape of being convenient for is favorable to adjusting combustion speed according to the fuel condition, makes the more intensive mixing complete combustion of fuel. The separate air ducts are used for air supply, the flame shape adjustment range is large, and ring formation in the kiln can be conveniently treated on line.

3. The utility model discloses a be equipped with flow measurement appearance, wind pressure appearance on each wind channel respectively, can be according to the output signal of instrument, the operative employee calculates through the theory and reachs the theoretical amount of wind that needs, according to flame combustion temperature, adjusts combustion-supporting wind roots's fan's frequency, reaches high-efficient complete combustion's state, reduces combustion cost.

4. Adopt in practice the utility model discloses, the total air supply volume of combustion-supporting wind reduces 692M³H, the gas quantity is reduced by 702M³The coal powder consumption is increased by 0.5t/h, the productivity is increased by 15.12t/d, and the heat consumption is reduced by 9.88 kgce/t.

Drawings

FIG. 1 is a schematic structural view of a fuel device of the present invention;

fig. 2 is a schematic diagram of the contact point of the roots blower of the fuel device.

In the figure: 1. a central hole of the ignition gun; 2. a central wind channel; 3. a pulverized coal passage; 4. a gas channel; 5. an outer swirling air passage; 6. an axial flow air passage; 7. an inner swirling air passage; 8. an internal air interface; 9. an external air interface.

Detailed Description

The invention will be further explained and explained with reference to the drawings;

as shown in fig. 1, a flame adjusting device of a rotary kiln fuel device comprises a fuel device, wherein the fuel device is sequentially provided with an oil gun and ignition gun central hole 1, a central air channel 2, a coal powder channel 3, a coal gas channel 4 and an axial flow air channel 6 from inside to outside, an inner rotational flow air channel 7 is further arranged between the central air channel 2 and the coal powder channel 3, an outer rotational flow air channel 5 is arranged between the coal gas channel 3 and the axial flow air channel 6, seven channels are formed in total, and six channels are mainly involved in combustion. The fuel device also comprises 2 frequency conversion Roots blowers for independently supplying air to the inner air and the outer air of the fuel device respectively, wherein the air outlet of one frequency conversion Roots blower is connected with the inner air interface 8 and communicated with the inner cyclone air channel and the outer cyclone air channel, and the air outlet of the other frequency conversion Roots blower is connected with the outer air interface 9 and communicated with the axial flow air channel. Each air channel is provided with a flow meter and a wind pressure meter.

The internal air channel in the former five-channel fuel device is divided into an internal rotational flow air channel and an external rotational flow air channel. The inner and outer swirl wind mainly acts on fuel mixing, and the flame increases the rotating speed by increasing the inner and outer swirl wind, so that the fuel is mixed more fully. The head of the flame is made into a 'writing point' shape by the central wind, and the flame lengthening function is achieved. The flame is furled by axial flow air, and becomes thick and thin by adjusting the air quantity of the air duct. The air channels are mutually matched to change the shape of flame, the position of a high-temperature area of the calcining zone can be moved, the ring formation is convenient to control and treat on line, the ring formation period is prolonged, and the operation rate of the rotary kiln is improved.

When the high-pressure combustion-supporting Roots blower is used, the internal air and the external air are separated through the 2 variable-frequency Roots blowers, the axial flow air (external air) and the internal and external rotational flow air (internal air) are respectively controlled through the 2 variable-frequency Roots blowers, the requirement on the combustion-supporting air quantity is not high for a high-pressure fuel device, and the requirement on the air pressure is high, so that the combustion-supporting air pressure is ensured by using the Roots blower. The inner and outer rotational flow wind and the axial flow wind of the fuel device are respectively and independently controlled, so that the combustion speed can be adjusted according to the fuel proportioning condition, and the fuel can be more fully mixed and completely combusted. When the fuel is far away from the head of the fuel, the fuel is mixed for the second time through the outer swirling wind to apply force to the mixed fuel of the coal gas and the coal powder again, the flow speed is increased, the firing range of the coal powder is increased, the flame presents rotating flame, the fuel mixing is facilitated, the flow speed of the flame is increased, the firing range of the coal powder is increased, the coal powder can be conveniently and fully combusted, and the heat consumption is reduced. The axial flow wind is used for gathering flame, protecting flame forming and protecting the kiln lining from being directly contacted by the flame. Through further improvement in the use process, a flow measuring instrument and a wind pressure instrument are additionally arranged on each air channel of the fuel device, an operator can obtain theoretical air quantity demand through theoretical calculation according to output signals of the instruments, the frequency of a combustion-supporting Roots blower is adjusted according to flame combustion temperature, the efficient and complete combustion state is achieved, and the combustion cost is reduced.

Claims

1. A flame adjusting device of a rotary kiln fuel device comprises the fuel device, and is characterized in that: the fuel device is sequentially provided with a central hole of an ignition gun, a central air channel, a coal powder channel, a coal gas channel and an axial flow air channel from inside to outside, wherein an inner rotational flow air channel is arranged between the central air channel and the coal powder channel, and an outer rotational flow air channel is arranged between the coal gas channel and the axial flow air channel.

2. A rotary kiln burner flame setting apparatus as defined in claim 1, wherein: the fuel device also comprises 2 variable-frequency Roots blowers for independently supplying air to the inner air passage and the outer air passage of the fuel device, wherein one variable-frequency Roots blower is communicated with the inner rotational flow air passage and the outer rotational flow air passage, and the other variable-frequency Roots blower is communicated with the axial flow air passage.

3. A rotary kiln burner flame setting apparatus as claimed in claim 1 or 2, wherein: each air channel is provided with a flow meter and a wind pressure meter.