Premixed fire row burner inside the dryer cylinder

Abstract

The present invention belongs to the technical field of heating equipment and relates to a premixed fire row burner in a dryer cylinder, which includes a hollow square tube. One end of the square tube is provided with an air inlet, and the other end is closed. A number of burners are arranged in a row on the long surface of the square tube, and igniters and flame signal induction needles are provided on both the first burner and the last burner. This burner can enable the normal combustion of the gas and the combustion-supporting gas mixture on the entire row of burners, ensuring uniform heating within the linear combustion range.

Description

Technical Field

[0001] The present invention relates to the technical field of heating equipment, and particularly to a premixed flame row burner inside a dryer cylinder. Background Art

[0002] A dryer cylinder is a hollow cylinder made of cast iron with covers at both ends, consisting of a cylinder body and cylinder covers at both ends. Its outer diameter is mostly 1000 - 3000 mm. During operation, steam is passed through the inside to dry and iron the conveyed paper. The heating of the dryer cylinder is completed by a linear burner, and the heating requirement is uniform fire power along the axial direction. For a direct - flow heat exchanger, it is very important to ensure the normal combustion of the entire row of burner nozzles. The burner nozzles are often ignited from one side and then the entire row is ignited. However, the burner nozzles farther away from the ignition position are more likely to go out. If the flame goes out, it will lead to uneven fire power and affect the paper drying effect.

[0003] Therefore, it is necessary to develop a premixed flame row burner inside a dryer cylinder to solve the above problems. Summary of the Invention

[0004] The main purpose of the present invention is to provide a premixed flame row burner inside a dryer cylinder, which can ensure the normal combustion of the entire row of burner nozzles.

[0005] The present invention realizes the above - mentioned purpose through the following technical solutions: A premixed flame row burner inside a dryer cylinder includes a hollow square tube. One end of the square tube is provided with an air inlet, and the other end is closed. A number of burner nozzles are arranged in a row on the long surface of the square tube, and an igniter and a flame signal induction needle are provided on both the first burner nozzle and the last burner nozzle.

[0006] Specifically, the igniter includes a positive electrode needle and a negative electrode needle, and the top of the flame signal induction needle is located between the positive electrode needle and the negative electrode needle.

[0007] Specifically, a perforated plate extending along the length direction of the square tube is provided inside the square tube. The perforated plate is provided with uniformly distributed ventilation holes, and the perforated plate divides the inside of the square tube into a lower cavity communicating with the air inlet and an upper cavity communicating with all the burner nozzles.

[0008] Specifically, lifting lugs are provided at both ends of the square tube.

[0009] Adopting the above - mentioned technical solutions, the beneficial effects of the technical solutions of the present invention are as follows:

[0010] This burner can make the gas and the combustion - supporting gas mix and burn normally on the entire row of burner nozzles, ensuring uniform heating within the linear combustion range. Brief Description of the Drawings

[0011] Figure 1 It is a three - dimensional view of the premixed flame row burner inside the dryer cylinder for the embodiment;

[0012] Figure 2 is Figure 1 The partial enlarged view of position A in

[0013] Figure 3 is Figure 1 The partial enlarged view of position B in

[0014] Figure 4 is the partial sectional view of the premixed fire row burner inside the dryer cylinder in the embodiment;

[0015] Figure 5 is the front view of the orifice plate.

[0016] The numbers in the figure indicate:

[0017] 1 - square pipe, 1a - lower cavity, 1b - upper cavity, 11 - air inlet, 12, 12a, 12b - burner nozzles, 13 - orifice plate, 131 - vent hole, 14 - lifting lug;

[0018] 2 - igniter, 21 - positive electrode needle, 22 - negative electrode needle;

[0019] 3 - flame signal induction needle. Specific embodiments

[0020] The present invention will be further described in detail below with reference to specific embodiments.

[0021] Embodiment:

[0022] As Figures 1 to 3 shown, a premixed fire row burner inside a dryer cylinder of the present invention includes a hollow square pipe 1. An air inlet 11 is provided at one end of the square pipe 1, and the other end is closed. A number of burner nozzles 12 are arranged on the long surface of the square pipe 1. Igniters 2 and flame signal induction needles 3 are provided on both the first burner nozzle 12a and the last burner nozzle 12b. During operation, the mixture of fuel gas and combustion-supporting gas enters the square pipe 1 from the air inlet 11 and then is continuously transported forward along the square pipe 1 and escapes from each burner nozzle 12. When the flame signal induction needle 3 does not detect a flame, the igniter 2 will continuously release electric sparks until both burner nozzles 12a and 12b are ignited. After the mixture gas of any adjacent burner nozzles 12a and 12b is ignited, the flame will ignite the mixture gas of the adjacent burner nozzles 12, thus igniting the entire row of burner nozzles 12. If the flame on any one of the burner nozzles 12a and 12b is extinguished, the flame signal induction needle 3 will sense the information, and then the igniter 2 will try to ignite the burner nozzles 12 again, so that the combustion state can be restored to normal in time, ensuring uniform heating within the linear combustion range.

[0023] As Figure 2 and Figure 3As shown, the igniter 2 includes a positive electrode needle 21 and a negative electrode needle 22, and the top of the flame signal induction needle 3 is located between the positive electrode needle 21 and the negative electrode needle 22. The flame signal induction needle 3 is located at the center of ignition, making it more sensitive to the presence of flame.

[0024] As Figure 4 and Figure 5 shown, an orifice plate 13 extending along the length direction is provided inside the square tube 1. The orifice plate 13 is provided with uniformly distributed ventilation holes 131. The orifice plate 13 divides the interior of the square tube 1 into a lower chamber 1a communicating with the air inlet and an upper chamber 1b communicating with all the burner nozzles 12. After the mixed gas enters the air inlet 11, it can only be ejected from the burner nozzle 12 through the orifice plate 13. Since the ventilation holes 131 will generate resistance to the gas, more mixed gas will be transported forward along the lower chamber 1a until the pressure is uniform. At this time, the mixed gas will diffuse toward the burner nozzle 12 at a uniform flow rate, so that a sufficient amount of mixed gas can be provided at all the burner nozzles for combustion, fundamentally reducing the probability of flameout.

[0025] As Figure 1 shown, lifting lugs 14 are provided at both ends of the square tube 1. The lifting lugs 14 are used to fix the square tube 1 inside the drying cylinder.

[0026] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A premixed fire row burner inside a dryer, comprising a hollow square tube. One end of the square tube is provided with an air inlet, and the other end is closed. A number of burner nozzles are arranged on the long surface of the square tube. Igniters and flame signal induction needles are provided on both the first burner nozzle and the last burner nozzle. The igniter includes a positive electrode needle and a negative electrode needle. The top end of the flame signal induction needle is located between the positive electrode needle and the negative electrode needle. An orifice plate extending along the length direction is provided inside the square tube. The orifice plate is provided with uniformly distributed ventilation holes. The orifice plate divides the interior of the square tube into a lower cavity communicating with the air inlet and an upper cavity communicating with all the burner nozzles.

2. The premixed fire bar burner in the dryer according to claim 1, characterized in that: Lifting lugs are provided at both ends of the square tube.

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