TWI676770B - Regenerative burner with cyclone device - Google Patents

Abstract

The invention discloses a regenerative burner with a cyclone device. A frame structure is provided in a combustion chamber of the burner. The frame structure includes a body including a through hole and at least one first and two air inlet holes. The first air inlet is connected to an air gas source, and the second air inlet is connected to a fuel gas source, and the gases are transported into the body, and guided by the structural design of the body and the flow direction of the gases themselves. A rotating fluid is formed in the through hole defined by the body. After that, the gas port of the burner is transported to combine a main gas (air) with a rotating fluid to form a mixed fluid. Here, the mixing efficiency of fuel and air is improved, and when the burner performs the combustion operation, the flame temperature is more uniform, thereby further improving the uniformity of the heat flow field in the burner's combustion furnace.

Description

Regenerative burner with cyclone device

The invention relates to a cyclone device, in particular to a device for mixing gas in a combustion chamber of a regenerative burner.

Regenerative burners are generally arranged in pairs, which can be used as inlet and exhaust channels at the same time. When combustion air and high-temperature exhaust gas flow through the burner's thermal storage chamber, they can be quickly stored and stored through thermal storage bricks (a heat transfer medium) The heat is released to operate interactively, and the heat alternates repeatedly. Here, it is possible to effectively use the high-temperature exhaust gas after the combustion of the regenerative burner and the gas mixed with the fuel required for the combustion operation.

Please refer to the first figure, which is a schematic diagram of the operation of a conventional regenerative burner. When a traditional regenerative burner is intended to perform a combustion operation, a main air 80 is sent from a gas inlet (not shown) into the combustion chamber 90. Then, a fuel gas source 82 (such as natural gas) is injected into any side of the combustion chamber 90 and mixed with the main air 80. Finally, an ignition device 92 is ignited in the combustion chamber 90 to ignite the mixed gas in a combustion furnace (not shown). Combustion operation; however, since the fuel gas source 82 enters at one end of the main air 80 for mixing, the portion adjacent to the main air 80 (such as the upper and lower ends) can be completely mixed with the fuel air source 82 and away from the main air 80 The other part (such as the middle position) is less effective for mixing with the fuel gas source 82. Therefore, when the two gases are mixed and combusted, it is easy to cause incomplete flame combustion, which causes problems such as uneven flame combustion temperature and longer flame forming length, and further increases the use cost of the fuel gas source 82 and prolonged combustion operation time. And the lack of uneven heat flow field in the combustion furnace.

Therefore, it is necessary to improve the above situations caused by the general regenerative burner during the combustion operation, in order to improve the mixing efficiency between the main air and the fuel gas source and improve the flame combustion temperature. And the uniformity of the heat flow field in the combustion furnace.

The object of the present invention is to provide a thermal storage burner with a cyclone device, which is provided with a frame structure in a combustion chamber, and the fluid (air, fuel gas) transmitted to the combustion chamber is mixed by the design of the frame structure. The fluids are uniformly mixed and a cyclone is formed, which is beneficial to improve the combustion temperature of the flame and the uniformity of the heat flow field in the combustion furnace when the regenerative burner performs the combustion operation.

In order to achieve the above object, the present invention discloses a thermal storage chamber burner having a cyclone device. One of the thermal storage burners communicates with a thermal storage chamber, and includes: a frame structure, which is disposed inside the combustion chamber. And includes a body, the body having a through hole penetrating the body, the through hole including an air inlet end and an air outlet end, the air inlet end is located at one end of the body opposite to the heat storage chamber, and the air outlet end is located at The other end of the body is opposite to the combustion chamber. The body further includes at least a first air inlet hole and at least a second air inlet hole. The first air inlet hole is disposed on the body facing the through hole, and is opposite to the body. One side wall of the body, the second air inlet hole is disposed on the body facing the through hole and opposite to the other side wall of the body; wherein the first air inlet hole transmits a first fluid and the second air inlet hole A second fluid is transmitted, the first fluid moves through the side wall and the direction of the second fluid, is mixed with the second fluid, moves along the body and rotates through the through hole, and the second fluid moves through the other Sidewall with The flow direction of the first fluid is guided, mixed with the first fluid, and moved along the body to rotate through the through hole, and the first fluid and the second fluid are mixed with the through hole to form a rotating fluid.

In order to make your reviewing members have a better understanding and understanding of the features of the present invention and the effects achieved, only the examples and the detailed description with cooperation are described below, the description is as follows:

Please refer to the second diagram, the third diagram A, and the third diagram B, which are a top view of a regenerative burner with a cyclone device, a gas actuation chart 1 and a gas actuation chart 2 of the present invention. As shown in the figure, the present invention is a thermal storage burner 1 having a cyclone device 2. The thermal storage burner 1 includes a combustion chamber 10, a thermal storage chamber 12, and an air inlet 14. The combustion chamber 10 is in communication with the thermal storage chamber 12. The gas inlet 14 is connected to the heat storage chamber 12 and communicates with the combustion chamber 10 through the heat storage chamber 12. The cyclone device 2 includes a frame structure 20 which is disposed inside the combustion chamber 10 and includes a body 22 having a through hole 24 which penetrates the body 22 and is located at a central position of the body 22. The through hole 24 includes an air inlet end 240 and an air outlet end 242. The air inlet end 240 is located at one end of the body 22 opposite to the heat storage chamber 12, and the air outlet end 242 is located at the other end of the body 22 opposite to the combustion chamber 10. The body 22 further includes at least one first air inlet hole 26 and at least two second air inlet holes 28. The first air inlet hole 26 is disposed on the body 22 facing the through hole 24, and is opposite to one of the side walls 220 of the body 22. The air hole 28 is disposed on the body 22 facing the through hole 24 and opposite to the other side wall 222 of the body 22.

In one embodiment of the present invention, the frame structure 20 is a square structure. Of course, the frame structure 20 can have any geometric shape, as long as it can match the shape of the combustion chamber 10, it is not the case. Limited. The first air inlet hole 26 and the second air inlet hole 28 are respectively provided in the frame structure 20. As shown in FIG. 3A, a first air inlet hole 26 is disposed on the body 22 opposite the side wall 220 facing the through hole 24, and a second air inlet hole 28 is disposed on the body 22 opposite the side wall 222 facing the through hole 24. The other first air inlet hole 26 ′ is disposed on the body 22 opposite to the side wall 220 ′ facing the through-hole 24, and the other second air inlet hole 28 ′ is disposed on the body 22 opposite to the side wall 222 ′ facing the through-hole 24.

In addition, the first air inlet holes 26 and 26 'are connected to a first air source 3, the second air inlet holes 28 and 28' are connected to a second air source 4, and the first air source 3 and the second air source 4 are respectively The combustion chamber 10 is connected to the first air inlet holes 26 and 26 ′ and the second air inlet holes 28 and 28 ′, and the transmission of the first air source 3 and the second air source 4 is adjusted by a control valve (not shown). The nature, timing, and flow rate of the gas, as well as the through-holes 24 that determine which gas is delivered by the air-intake holes into the body 22.

When the thermal storage burner 1 of the present invention is to be operated with a cyclone device 2 for combustion operation, it is shown in FIG. 3A. First, the first air inlet holes 26, 26 ′ deliver a first fluid 30, 30 ′ through the first air source 3, and the second air inlet holes 28, 28 ′ deliver a second fluid 40, 40 through the second air source 4. '. The first fluid 30/30 'enters the through hole 24 of the body 22 and has a power flow moving toward the side wall 220/220'. When the first fluid 30/30 'moves to the side wall 220/220', it will interact with the second fluid. 40/40 'meet, and at the same time guided by the flow direction of the second fluid 40/40' and the structure of the side wall 220/220 ', the first fluid 30/30' and the second fluid 40/40 'will begin to mix and follow the body The side wall 220/220 'of 22 moves right / left. Similarly, when the second fluid 40/40 'enters the through hole 24 of the body 22, it has a one-way path to the side wall 222/222'. When the second fluid 40/40 'moves to the side wall 222/222', it The first fluid 30 '/ 30 meets and is guided through the flow direction of the first fluid 30' / 30 and the structure of the side wall 222/222 '. The second fluid 40/40' and the first fluid 30 '/ 30 will begin to mix and Move up / down along the side walls 222/222 'of the body 22. Here, the first fluid 30, 30 'and the second fluid 40, 40' are repeatedly mixed and moved around to form a rotating fluid 50 in the through hole 24 (as shown in the third B diagram).

Following the previous paragraph, please also refer to the fourth figure, which is a schematic diagram of the cyclone operation of the thermal storage burner with a cyclone device according to the present invention. As shown in the figure, the air supply port 14 of the regenerative burner 1 sends a third fluid 140 to the heat storage chamber 12 and flows through the intake end 240 into the through-hole 24, and the third fluid 140 is rotated by the rotating fluid 50 In addition, the rotating fluid 50 and the third fluid 140 are fused to form a mixed fluid 60 composed of the first fluid 30, 30 ′, the second fluid 40, 40 ′, and the third fluid 140 having a rotating flow direction. The mixed fluid 60 is guided by the flow direction of the third fluid 140 itself, and leaves the through-hole 24 and flows out of the gas outlet end 242. Then, the mixed fluid 60 is ignited in the combustion chamber 10 through an ignition device 18 provided in the regenerative burner 1 to generate a The flame 62 is sprayed into a combustion furnace (not shown) by a nozzle 16 connected to the combustion chamber 10 to perform a combustion operation.

Wherein, the first fluid 30, 30 'and the third fluid 140 are air, the air transport ratio of the first fluid 30, 30' is 5-20%, and the air transport ratio of the third fluid 140 is 80-95%, or The transmission ratio of the first fluid 30, 30 'and the third fluid 140 may be 1:10, and the second fluid 40, 40' is natural gas, and the transmission ratio thereof is 100%. Therefore, a portion of air is first mixed with 100% natural gas of the second fluid 40, 40 'via the first fluid 30, 30', and it can be established that part of the air has been uniformly mixed with the fuel gas (natural gas). In addition, the rotating fluid 50 driven by the cyclone device 2 is used to synchronize the third fluid 140 passing through the through-hole 24 to generate a cyclonic airflow to form a mixed fluid 60. The cyclonic flow of the mixed fluid 60 is used to uniformly fuse the first, second, Three fluids 30, 30 ', 40, 40', 140, and the addition of a rotating cyclone to make the regenerative burner 1 during the combustion process, because the fuel and air are effectively mixed, the temperature of the flame 62 can be uniformed, thereby improving the heat in the combustion furnace Advantages of uniform flow field.

Referring back to the second and fourth figures, the combustion chamber 10 of the regenerative burner 1 of the present invention is connected to a nozzle 16 and includes a diameter-enlarged portion 160 and a convergent portion formed by the diameter-increased extension of the diameter-enlarged portion 160. Composed of 162, the enlarged diameter portion 160 is connected to the combustion chamber 10, and the convergent portion 162 is provided in the combustion furnace. The enlarged diameter portion 160 communicates with the condensed portion 162 so that the combustion chamber 10 communicates with the combustion furnace via the nozzle 16, and the mixed fluid 60 can be changed from The combustion chamber 10 ignites and burns in a combustion furnace through a nozzle 16. When the mixed fluid 60 is ignited by the ignition device 18 to be burned in the combustion furnace, the tapered design of the enlarged diameter portion 160 to the condensing portion 162 is used to enhance the injection speed of the mixed fluid 60 to increase the intensity of the flame 62 combustion. In addition, the combustion chamber 10 and the heat storage chamber 12 of the regenerative burner 1 of the present invention can be made of castable refractory material 7 on the periphery of both of them, and the material of the castable refractory material 7 is Alumina can increase the withstand temperature up to 1400 ° C or higher during the combustion operation of the regenerative burner 1, and has a good heat resistance effect, thereby improving the service life of the regenerative burner 1.

In summary, the thermal storage burner with a cyclone device taught by the present invention has the following advantages: 1. Use the cyclone device to distribute air and the transportation method and ratio between fuel (natural gas) to improve the efficiency of fuel and air mixing To uniform flame temperature. 2. The flame burns evenly in the combustion furnace, increasing the stirring capacity of the heat flow field in the furnace. 3. Manufactured from high-density refractory cast material, which strengthens the structural strength of the overall regenerative burner, thereby improving the temperature resistance effect and extending the service life of machinery and equipment.

1‧‧‧ Regenerative Burner

10‧‧‧Combustion chamber

12‧‧‧ heat storage room

14‧‧‧gas inlet

140‧‧‧ third fluid

16‧‧‧ Nozzle

160‧‧‧Expansion Department

162‧‧‧Beaming Department

18‧‧‧Ignition device

2‧‧‧ cyclone device

20‧‧‧Frame structure

22‧‧‧ Ontology

220, 220’‧‧‧ sidewall

222, 222’‧‧‧ sidewall

24‧‧‧through hole

240‧‧‧Air inlet

242‧‧‧Air outlet

26, 26’‧‧‧first air inlet

28, 28’‧‧‧Second air inlet

3‧‧‧ the first gas source

30、30’‧‧‧first fluid

4‧‧‧Second gas source

40、40’‧‧‧Second fluid

50‧‧‧ rotating fluid

60‧‧‧mixed fluid

62‧‧‧ Flame

7‧‧‧ Castable refractory

80‧‧‧ main air

82‧‧‧ Fuel gas source

90‧‧‧combustion chamber

92‧‧‧Ignition device

The first picture: it is a schematic diagram of the operation of a conventional regenerative burner; the second picture: it is a top view of the regenerative burner with a cyclone device of the present invention; the third A: it is the Figure 1 of gas operation of regenerative burner; Figure 3B: Figure 2 of gas operation of regenerative burner with cyclone device of the present invention; and Figure 4: Thermal action of thermal regenerator with cyclone device of the present invention Schematic diagram of the cyclone action of the burner.

Claims (7)

A thermal storage burner with a cyclone device. One of the thermal storage burners is in communication with a thermal storage chamber. The thermal storage burner includes: a frame structure, which is arranged inside the combustion chamber and includes a body. A through hole penetrating the body, the through hole including an air inlet end and an air outlet end, the air inlet end is located at one end of the body and opposite to the heat storage chamber, and the air outlet end is located at the other end of the body and opposite to the combustion Room, the body further includes at least a first air inlet hole and at least a second air inlet hole, the first air inlet hole is disposed on the body facing the through hole, and the second inlet is opposite to a side wall of the body; The air hole faces the through hole and is disposed on the body and opposite to the other side wall of the body; wherein the first air inlet hole transmits a first fluid, the second air inlet hole transmits a second fluid, and the first Fluid movement is guided by the flow direction of the side wall and the second fluid, mixed with the second fluid moves along the body and rotates through the through hole, and the second fluid moves through the other side wall and the first fluid flow guide Cited, with the first Mixing the body fluid is moved in the through hole to rotate, the first fluid and the second fluid were mixed in the through hole formed in a rotary fluid. The thermal storage burner with a cyclone device described in item 1 of the scope of the patent application, further includes an air inlet, which is connected to the thermal storage chamber and communicates with the combustion chamber through the thermal storage chamber. The fluid flows through the inlet end and enters the through hole to be mixed with the rotating fluid to form a mixed fluid. At the same time, the mixed fluid leaves the through hole and flows out from the outlet end. According to the thermal storage burner with a cyclone device described in item 2 of the scope of the patent application, wherein the first fluid and the third fluid are air, and the second fluid is natural gas. According to the thermal storage burner with a cyclone device described in item 3 of the scope of the patent application, the air transfer ratio of the first fluid is 5-20%, and the air transfer ratio of the third fluid is 80-95%, The natural gas transmission ratio of the second fluid is 100%. According to the thermal storage burner with a cyclone device described in item 3 of the scope of the patent application, wherein the transmission ratio of the first fluid to the third fluid is 1:10. The regenerative burner with a cyclone device as described in item 1 of the scope of the patent application, further includes a nozzle including a diameter expanding portion and a converging portion formed by the diameter expanding portion to be gradually extended to form the diameter expanding portion. The combustor is connected to the combustor. The constriction part is disposed in a combustor. The enlarged diameter part communicates with the constrictor. The combustor communicates with the combustor through the nozzle. According to the thermal storage burner with a cyclone device described in item 1 of the scope of the patent application, wherein the periphery of the combustion chamber and the thermal storage chamber is coated with a castable refractory, the castable refractory is alumina.