CN210601600U

CN210601600U - Preposed combustion device of oil gun

Info

Publication number: CN210601600U
Application number: CN201921128431.0U
Authority: CN
Inventors: 胡建廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-05-22
Anticipated expiration: 2029-07-17

Abstract

The utility model relates to a leading burner of oil gun, especially the oil gun burner who ignites the start-up in-process used extensively under power station circulating fluidized bed boiler bed, including ignition wind channel and oil burner, the ignition wind channel including main hot one bellows entry, the hot one bellows entry of oil burner, ignition wind channel body and a combustion section of thick bamboo, oil burner including oil gun and pipe, burning torch and pipe, surely fire cover and dryer, for preventing burning out the combustion section of thick bamboo and improving heat exchange efficiency, will burn dryer, oil gun and pipe, burning torch and pipe, surely fire the cover etc. and extend and shift, flame obtains abundant release, has protected the combustion section of thick bamboo completely and has improved heating efficiency, further economizes on fuel.

Description

Preposed combustion device of oil gun

Technical Field

The invention relates to a boiler combustion device, in particular to a front combustion device of an oil gun, which is widely used in the starting process of an ignition air channel under a circulating fluidized bed boiler bed.

Background

At present, in a circulating fluidized bed power station boiler produced by eastern boiler limited under the heading of eastern electrical group, the ignition is started under the bed as the main structural mode.

The ignition method for starting the bed under the boiler is mainly characterized in that two or four ignition air channels are arranged on the left and right sides below a boiler air chamber, one or two ignition oil guns are arranged in each air channel, hot primary air is introduced into the air channels, and the hot primary air is changed into high-temperature primary air to be fed into the air chamber after being heated violently by the oil guns, so that the bed materials of the boiler are heated repeatedly and circularly.

The oil gun ignition is realized in the ignition air duct, and the output of a single oil gun is generally 1000k_gAbout/h, the diameter of the air duct is too narrow and cannot be as deep as a hearth, so that the oil gun combustion is limited combustion, and the combustion air distribution mode is particularly critical: the air distribution is not good, the flame of the oil gun is very easy to extinguish, the flame is unstable to burn, and the boiler is started to bring difficulty, therefore, a boiler factory technician designs a combustion cylinder specially for the oil gun, the combustion cylinder is arranged in the flame area of the oil gun in front, wraps the flame body, and the oil gun is coiled at the bottom of the combustion cylinder, so that the design is theoretically possible, but the following problems occur in the actual operation: the flame temperature is very high, direct radiation, erode the combustion barrel inner wall, cause the combustion barrel to warp seriously, the refractory castable of its inside lining drops very fast, shut down the stove to overhaul at every turn and all need repair, because the oil gun technique that adopts is different, and the oil gun that the technique is poor burns incompletely, directly at the combustion barrel inner wall carbon deposit, causes the fuel extravagant, and is poor with mainstream hot-blast heat transfer condition, and the heat transfer process is long.

Disclosure of Invention

The present invention provides a pre-combustion device for an oil gun, which aims to solve the technical problem of the prior art.

The technical scheme adopted by the invention for solving the technical problems is that the oil gun preposed combustion device comprises an ignition air channel and an oil burner; the ignition air channel comprises a primary air box inlet, a combustion cylinder and an air channel body, wherein primary air is divided into two parts, one part is sent to the oil burner, and the other part is sent to flame for cooling; the oil burner comprises an oil gun and a guide pipe, an ignition gun and a guide pipe, a flame stabilizer, an air duct and the like; the ignition air channel is connected with the oil burner through a fixed flange; the combustion stabilizing device is arranged at the head of the oil gun guide pipe and is parallel and level to the head of the combustion cylinder, the oil gun is arranged in the oil gun guide pipe, the ignition gun is arranged in the ignition gun guide pipe, the ignition gun and the guide pipe, the oil gun and the guide pipe, the combustion stabilizing device and the like are concentrically arranged in the air cylinder, and the air cylinder is fixed on the hot primary air box through a fixing flange.

The oil gun preposed combustion device is mainly characterized in that the head parts of the oil gun and the guide pipe, the head parts of the ignition gun and the guide pipe, the stable combustion cover and the head part of the air cylinder are flush with the end part of the original combustion cylinder.

Drawings

Fig. 1 is a front view showing the overall structure of a front combustion apparatus for an oil gun, and fig. 2 is a right sectional view showing a front combustion mode for an oil gun of fig. 1.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings:

the structure of the invention is as follows:

referring to fig. 1 and 2, the oil gun pre-combustion device comprises: the ignition air channel comprises a main hot one-air box inlet 1, an oil burner hot primary air box inlet 2, an ignition air channel body 3 and a combustion cylinder 4; the oil burner comprises an oil gun and a guide pipe 7, an ignition gun and a guide pipe 6, a stable combustion cover 9 and an air duct 5.

Wherein a leading burner of oil gun's main hot one bellows entry 1, combustion cylinder 4, dryer 5 weld on ignition wind channel body 3, the position of main hot primary air entry 1 is a little later than the exit position of combustion cylinder 4, avoids directly blowing flame.

The oil burner of the oil gun preposed combustion device is characterized in that an oil gun and a guide pipe 7, an ignition gun and a guide pipe 6 are arranged in the center of an air duct 5 through a fixed flange 8.

Wherein the combustion stabilizing cover 9 is arranged at the head part of the oil gun and the guide pipe 6.

The oil burner of the oil gun preposed combustion device is arranged on the inlet 2 of the hot primary air box of the oil burner through a fixed flange 8.

In the embodiment, two sets of oil burners are arranged in one ignition air channel simultaneously, and the vertical arrangement mode is adopted.

The working principle is as follows:

firstly, the boiler starts a combustion-supporting fan, combustion-supporting air reaches ignition air and is divided into two parts everywhere, one part enters the root part of an oil burner through an oil-hot primary air box inlet 2, the other part enters an ignition air channel through a main-hot primary air box inlet 1, the oil burner hot primary air box inlet 2 and the main-hot primary air box inlet 1 are both provided with a large amount of cold air to reach, and the air volume of the main-hot primary air box inlet 1 is far greater than that of the oil burner hot primary air box inlet 2.

Then, ignition is started, under the strict operation of the DCS control system, the ignition device finishes ignition, the oil burner is started to burn, and cold air is heated normally.

The benefits of this are:

a leading burner of oil gun, characterized by is with oil gun and pipe 7, burning torch and pipe 6, dryer 5 extension forward simultaneously, the extension is to its exit parallel and level with former combustion cylinder 4, a flame goes out combustion cylinder 4 and reachs the cold wind mouth promptly, obtains the cooling rapidly, because the diameter of ignition wind channel body 3 is greater than the internal diameter of combustion cylinder 4 far away, flame can in time spread, in time contact with a large amount of perimeter cold wind that main hot first bellows entry 1 sent, realizes the heat exchange.

Since a large amount of peripheral cold air sent from the main hot-air box inlet 1 is in contact with the outer flame of the flame sprayed from the oil burner and cannot blow to the root of the flame, the flame can be stably combusted.

Because the flame does not burn in the combustion cylinder 4, the originally designed combustion cylinder 4 is fully ensured, the deformation and the repair are not needed, and the production and operation cost is saved.

The adoption of high-efficiency combustion technology, such as supersonic oil-saving oil gun, can realize stable combustion and high-efficiency heat exchange.

Another embodiment is as follows: the combustion cylinder 4 can also be a vertical air distribution plate, a plurality of air flow holes are formed in the air distribution plate, and then the air flow holes are welded at the head of the air cylinder 5, so that the same effect is achieved.

Claims

1. A pre-combustion device of an oil gun comprises an ignition air channel and an oil burner, and is characterized in that the ignition air channel comprises a main hot primary air box inlet (1), an oil burner hot primary air box inlet (2), an ignition air channel body (3) and a combustion cylinder (4); wherein the main heat one bellows inlet (1), the combustion cylinder (4) and the air cylinder (5) are welded on the ignition air duct body (3); the oil burner including oil gun and pipe (7), burning torch and pipe (6), surely fire cover (9) and dryer (5), wherein oil gun and pipe (7), burning torch and pipe (6) install in the center of dryer (5) through mounting flange (8), wherein surely fire cover (9) install the head at the pipe of oil gun and pipe (6), wherein the oil burner pass through mounting flange (8) and install on oil burner hot primary air case entry (2).

2. The oil gun pre-combustion device as claimed in claim 1, wherein the combustion stabilizing cover (9) is moved forward to be flush with the outlet end face of the original combustion barrel (4), the oil gun and the duct (7), the ignition gun and the duct (6) and the air duct (5) are correspondingly lengthened, and the outlet of the lengthened air duct (5) is flush with the outlet end face of the original combustion barrel (4).