Special low-NOX and low-CO gas burner for low-temperature hearth

Abstract

The invention relates to the technical field of hearth combustion, in particular to a low-NOX and low-CO gas burner special for a low-temperature hearth, which comprises a barrel, a pretreatment placement assembly is mounted at the bottom end of the barrel, the pretreatment placement assembly comprises a base fixedly mounted at the bottom end of the barrel, an upper fire pan brick is mounted at the upper end of the barrel, and a lower fire pan brick is mounted at the lower end of the barrel. A furnace bottom lining is arranged at the upper end of the barrel body, the upper fire pan brick corresponds to the furnace bottom lining, a top plate is arranged at the upper end of the barrel body, a center air gun is vertically installed in the middle of the top plate, an air adjusting butterfly valve is connected to the outer surface of the barrel body, and a fixing disc is arranged at the bottom end of the barrel body. An incandescent light gas pipe is installed on one side of the fixing disc in a penetrating mode, a gas inlet assembly is fixedly connected to the bottom end of the center gas gun, the generation amount of NOX in flue gas is reduced, meanwhile, a high-temperature area is formed by a necking structure of the upper brazier brick, the CO concentration in the flue gas can be obviously reduced, and the overall treatment effect of the combustor is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of furnace combustion, in particular to a low-NOX and low-CO gas burner specially used for a low-temperature furnace. Background Art

[0002] Burner is a general term for devices that spray fuel and air in a certain way for mixed combustion. Burners are divided into industrial burners, burners, civil burners, and special burners according to their types and application areas. They are mostly made of corrosion-resistant and high-temperature-resistant materials such as stainless steel or titanium. At present, according to the market dynamics, the development direction of heating furnaces towards energy saving and high efficiency, and information from all parties, the low-temperature furnace dedicated burners have the following shortcomings in use: First, in the domestic petroleum refining industry, the furnace operating temperature of the hydrogenation unit heating furnace is generally lower than 650°C, while the ignition point of the combustion intermediate product CO is 650°C, so a large amount of unburned CO in the low-temperature furnace will be discharged into the atmosphere with the flue gas, which is not conducive to the energy saving of the heating furnace. Even if imported brands of low NO X The burner cannot reduce the CO content in the flue gas. At the same time, the high CO content can easily cause pressure fluctuations in the heating furnace, which is not conducive to the stable operation of the heating furnace.

[0003] Therefore, those skilled in the art provide a low-NO X A low CO gas burner is provided to solve the problems raised in the above background technology. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a low-NO X Low CO gas burner solves the problem that the furnace operating temperature of the hydrogenation unit heating furnace in the domestic petroleum refining industry is generally lower than the linkage rod 650℃, but the ignition point of the combustion intermediate product CO is the linkage rod 650℃, so a large amount of unburned CO in the low-temperature furnace will be discharged into the atmosphere with the flue gas, which is not conducive to the energy saving of the heating furnace. X The burner cannot reduce the CO content in the flue gas. At the same time, high CO content can easily cause pressure fluctuations in the heating furnace, affecting the stability of the heating furnace. To achieve the above objectives, the present invention is implemented through the following technical solutions: The technical solution adopted by the present invention to solve the technical problem is: a low-NO XA low CO gas burner comprises a cylinder, a pretreatment placement assembly is installed at the bottom end of the cylinder, the pretreatment placement assembly comprises a base fixedly installed at the bottom end of the cylinder, an upper fire basin brick is installed at the upper end of the cylinder, a furnace bottom lining is arranged at the upper end of the cylinder, the upper fire basin brick corresponds to the furnace bottom lining, a top plate is arranged at the upper end of the cylinder, a central air gun is vertically installed at the middle of the top plate, an air regulating butterfly valve is connected to the outer surface of the cylinder, a fixed plate is arranged at the bottom end of the cylinder, a long-burning gas pipe is inserted and installed on one side of the fixed plate, a gas intake assembly is fixedly connected to the bottom end of the central air gun, a combustion-supporting air intake assembly is installed at the upper end of the air regulating butterfly valve, a cyclone seat is installed at the upper end of the central air gun through the top plate, and the inner side of the upper fire basin brick A lower fire basin brick is provided, and an energy focusing ring is provided on the inner side of the lower fire basin brick, and the cyclone seat is located on the inner side of the energy focusing ring. One end of the central air gun passing through the top plate is annularly connected with a plurality of lower gas distribution bends, and an ignition head assembly is provided on the inner side of the lower fire basin brick. A furnace combustion external air gun is vertically installed between the upper fire basin brick and the lower fire basin brick. An outer lining ring tube is provided on the inner side of the lower fire basin brick, and a plurality of outer nozzles are annularly provided on the upper surface of the outer lining ring tube, and the outer nozzles are arranged around the outer circle of the lower fire basin brick and the lower outer circle. A cyclone control assembly is annularly provided on the inner side of the energy focusing ring, and the cyclone control assembly includes a plurality of cyclones annularly arranged on the cyclone seat, and a pin is hinged on the upper surface of the cyclone. A cyclone adjustment assembly is provided on the upper part of the upper fire basin brick.

[0005] Preferably, the gas intake assembly includes a docking flange fixedly connected to the bottom end of the center air gun, a first gas delivery pipe is installed at the bottom end of the docking flange, an outer gas ring pipe is installed at the lower part of the fixed plate, a second gas delivery pipe is fixedly connected to the lower surface of the outer gas ring pipe, the first gas delivery pipe and the second gas delivery pipe are connected to a tee at one side corresponding to the other end of the tee, and a main gas pipe is installed at the other end of the tee.

[0006] Preferably, the combustion air intake assembly includes a servo motor fixedly mounted on the upper end of the air regulating butterfly valve, two rotating rods are inserted and installed on the inner side of the air regulating butterfly valve, the output shaft of the servo motor is connected to one of the rotating rods, the two rotating rods are located on the inner side of the air regulating butterfly valve and are welded with ventilation butterflies, the two rotating rods pass through the bottom ends of the air regulating butterfly valve and are fixedly mounted with pulleys, and the two pulleys are connected by belts.

[0007] Preferably, the lower portion of the upper fire basin brick is provided with square holes in an annular shape, the number of the square holes is 1000 ...

[0008] Preferably, a valve-gauge distribution unit is provided on the outer side of the first gas delivery pipe and the tee, and the valve-gauge distribution unit includes a gas shut-off valve and a pressure gauge, which respectively realize flow regulation of the central gas gun and the gas gun outside the furnace combustion.

[0009] Preferably, the ignition head assembly includes an inner lining ring tube arranged on the inner side of the lower fire basin brick, a plurality of the lower air-dividing bends are connected to the inner lining ring tube, a plurality of upper air-dividing bends are annularly connected to the upper surface of the inner lining ring tube, a plurality of grooves matching the upper air-dividing bends are provided at the upper end of the energy focusing ring, an inner nozzle is installed at one end of the plurality of upper air-dividing bends passing through the grooves close to the cyclone seat, and an inclined hole facing the lower fire basin brick is provided on the outside of the inner nozzle.

[0010] Preferably, the inner side of the energy focusing ring is rotatably connected to a plurality of positioning rods, the outer surface of the positioning rod is fixedly sleeved with an open linkage block, a linkage rod is rotatably connected between every two opening linkage blocks, a linkage buckle is slidably provided on one side of the opening linkage block, and the linkage buckle is connected to the pin shaft.

[0011] Preferably, the cyclone regulating assembly includes a control valve arranged on the lower fire basin brick, a control steel wire is arranged on the inner side of the control valve, and the control steel wire passes through the upper fire basin brick and the lower fire basin brick and enters the inner side of the energy gathering ring and is connected with the opening linkage block.

[0012] Preferably, a perpetual lamp is provided between the lower fire basin brick and the energy focusing ring, and the perpetual lamp passes through the cylinder and is connected with the outer air ring tube.

[0013] Beneficial effects of the present invention: 1. A low-NO2-free low-temperature furnace X The low CO gas burner, through the fuel gas flow through the three-way, enters the central gas gun and the outer gas gun respectively. According to the principles of fuel classification, thick and thin combustion, and flue gas internal circulation combustion, the 8 internal gas nozzles on the central gas gun are responsible for about 25% of the total fuel flow, and are fully mixed and burned with all the required high-temperature air in the inner cavity of the fire basin brick. At this time, it is over-oxygen combustion, which effectively reduces the temperature of the flame of the primary combustion. The mixture of the primary combustion flue gas and the remaining high-temperature air is mixed and burned with the fuel accounting for 75% of the total fuel flow from the 8 external gas nozzles on the external gas gun at the plane above the lower fire basin brick to form a secondary flame. Since the flow speed of the secondary fuel is as high as about 300m / s, it effectively brings part of the furnace flue gas into the combustion area, diluting the oxygen concentration, which effectively suppresses NO in the combustion process. X The amount of NO generated in the flue gas X Concentration of 50 mg / m 3 the following.

[0014] 2. A low-NO2 gas specially used for low-temperature furnaces according to the present inventionX Low CO gas burner, because the lower part of the upper fire basin brick is provided with square holes, the number of which is the same as the number of external nozzles. When the fuel gas of the external air gun is ejected at high speed, it can drive part of the furnace flue gas into the combustion area from the square holes; the upper part is a contraction structure, forming a high-temperature combustion area, so that the combustion intermediate product CO is fully burned in this area, and the CO concentration in the discharged flue gas is 80mg / m 3 the following.

[0015] 3. A low-NO2 gas specially used for low-temperature furnaces according to the present invention X The low CO gas burner is equipped with a swirler on the central air gun. The combustion-supporting air flowing out of the swirler and the fuel gas flowing out of the horizontal cross hole of the central gun nozzle form a counter-jet strong mixing, so that the fuel gas and the combustion-supporting air are mixed evenly, which enhances the stability of the flame, reduces the excess air coefficient, and is beneficial to the energy saving of the heating furnace.

[0016] 4. A low-NO2-free low-temperature furnace X Low CO gas burner, through the three-way gas stop valve and pressure gauge set on the center of the air gun and the outer air gun flow regulation, so as to control the amount of reflux flue gas introduced into the furnace, indirectly control the center flame temperature and the temperature of the outer swirl flame, according to the operation conditions to adjust NO x Balance point with CO, reaching low NO x The burner adopts combustion technology measures such as gas staging, concentrated and diluted combustion, mixing promotion, flue gas circulation and NOX generation control, which effectively reduces NO in flue gas. X At the same time, the high-temperature area formed by the shrinkage structure of the upper fire basin brick can significantly reduce the CO concentration in the flue gas and ensure the best effect of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure of the middle base; Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure of the middle cylinder and the upper fire basin brick; Figure 4 For the present invention Figure 3 Schematic diagram of the internal structure of the upper and lower fire basin bricks in cross section; Figure 5 For the present invention Figure 4 Schematic diagram of the cross-section structure of the ignition head assembly; Figure 6 For the present invention Figure 4 A schematic diagram of the top view of the structure of the central swirl control assembly; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at A in the middle; Figure 8 For the present invention Figure 1 Middle front view structural diagram; Fig. 9 For the present invention Figure 1 Schematic diagram of the structure from above.

[0019] In the figure: 1. Pre-process and place components; 110, cylinder; 111, air regulating butterfly valve; 112, furnace bottom lining; 113, fixed plate; 114, top plate; 120, base; 130, upper fire basin brick; 140, lower fire basin brick; 141, energy-gathering ring; 2. Gas intake assembly; 210, first gas delivery pipe; 211, valve meter distribution unit; 212, docking flange; 213, center gas gun; 220, gas pipe for the pilot lamp; 230, tee; 240, main gas pipe; 250, second gas delivery pipe; 251, outer gas ring pipe; 252, pilot lamp; 260, outer gas gun for furnace combustion; 261, outer lining ring pipe; 262, outer nozzle; 3. Combustion air intake assembly; 310, servo motor; 320, rotating rod; 330, ventilation butterfly; 340, pulley; 4. Cyclone adjustment assembly; 410, control valve; 411, control wire; 5. Ignition head assembly; 510, lower gas distribution elbow; 520, inner lining ring pipe; 530, upper gas distribution elbow; 540, inner nozzle; 541, inclined hole; 6. Swirl control components; 610, cyclone seat; 620, linkage buckle; 630, cyclone; 640, opening linkage block; 650, linkage rod; 660, pin shaft; 670, positioning rod. DETAILED DESCRIPTION

[0020] The embodiment of the present invention provides a low-NO XLow CO gas burners solve the problem that the furnace operating temperature of the hydrogenation unit heating furnace in the domestic petroleum refining industry is generally lower than 650°C. However, the ignition point of the combustion intermediate product CO is 650°C. In this way, a large amount of unburned CO in the low-temperature furnace will be discharged into the atmosphere with the flue gas, which is not conducive to the energy saving of the heating furnace. X The burner cannot reduce the CO content in the flue gas. At the same time, high CO content can easily cause pressure fluctuations in the heating furnace, affecting the stability of the heating furnace. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figure 1-Figure 9 As shown, the present invention is a low-NO XThe low CO gas burner comprises a cylinder 110, a pretreatment placement assembly 1 is installed at the bottom of the cylinder 110, the pretreatment placement assembly 1 comprises a base 120 fixedly installed at the bottom of the cylinder 110, an upper fire basin brick 130 is installed at the upper end of the cylinder 110, a furnace bottom lining 112 is arranged at the upper end of the cylinder 110, the upper fire basin brick 130 corresponds to the furnace bottom lining 112, a top plate 114 is arranged at the upper end of the cylinder 110, a central air gun 213 is vertically installed in the middle of the top plate 114, and an air regulating butterfly valve is connected to the outer surface of the cylinder 110 111, a fixed plate 113 is provided at the bottom end of the cylinder 110, a pilot light gas pipe 220 is inserted and installed on one side of the fixed plate 113, a gas intake assembly 2 is fixedly connected to the bottom end of the central air gun 213, a combustion air intake assembly 3 is installed at the upper end of the air regulating butterfly valve 111, a cyclone seat 610 is installed at the upper end of the central air gun 213 through the top plate 114, a lower fire basin brick 140 is provided on the inner side of the upper fire basin brick 130, an energy focusing ring 141 is provided on the inner side of the lower fire basin brick 140, and the cyclone seat 610 is located inside the energy focusing ring 141 On the side, one end of the central air gun 213 passing through the top plate 114 is connected in an annular manner to a plurality of lower gas distribution elbows 510, an ignition head assembly 5 is arranged on the inner side of the lower fire basin brick 140, a furnace combustion outer air gun 260 is vertically installed between the upper fire basin brick 130 and the lower fire basin brick 140, an outer lining ring pipe 261 is arranged on the inner side of the lower fire basin brick 140, and a plurality of outer nozzles 262 are arranged in an annular manner on the upper surface of the outer lining ring pipe 261, and the outer nozzles 262 are arranged around the outer circle of the lower fire basin brick 140, around the lower outer circle, and the inner side of the energy focusing ring 141 is arranged in an annular manner. There is a swirl control assembly 6, which includes a plurality of swirlers 630 arranged in an annular manner on a swirl seat 610, and a pin 660 is hinged on the upper surface of the swirlers 630. A cyclone adjustment assembly 4 is arranged on the upper part of the upper fire basin brick 130. The cylinder 110 is a hollow cup-shaped structure, which is the main carrier for installing other components. It is fixed to the bottom plate of the heating furnace through the steel plate flange with the outside. The outer wall of the cylinder 110 is made of steel plate. In order to prevent the heat of the flame or preheated air from being transferred to the outer wall during operation, an insulation layer is arranged inside. The air regulating butterfly valve 111 is provided with an air regulating handle. Rotating the external handle controls the valve plate opening, thereby controlling the combustion-supporting air volume.

[0022] A further technical solution is that the fixed plate 113 is provided with an insulation layer, and a plurality of circular holes are arranged on the bottom end plate thereof, the central circular hole is fixed to the central air gun 213 by welding, the ever-burning lamp 252 passes through the corresponding circular hole and the sleeve, and is fixed to the bottom end plate of the fixed plate 113 by a flange, and a plurality of circular holes are opened at the bottom end of the fixed plate 113, and the circular holes are respectively installed with the ignition hole and the fire viewing hole.

[0023] A further technical solution is that the swirler 630 is welded to the top of the central air gun 213, and the control valve 410 is externally controlled to drive the control wire 411 to pull the traction opening linkage block 640 to swing, thereby driving the linkage rod 650 to move at the same time, so that the linkage buckle 620 moves to drive the pin 660 to move, and further drive the swirler 630 to adjust the air intake volume. The combustion-supporting air flowing out of the swirler 630 and the fuel gas flowing out of the horizontal horizontal hole of the central gun nozzle form a strong counter-mixing to form a stable flame.

[0024] A further technical solution is that the upper fire basin brick 130 is made of refractory castable material and is placed on the furnace bottom lining 112. Its lower part is provided with 8 square holes to facilitate the inflow of furnace flue gas; its upper part is a contraction structure, which is a flame gathering section.

[0025] A further technical solution is that a lower fire basin brick 140 is arranged on the inner side of the upper fire basin brick 130, and an energy-gathering ring 141 is arranged on the inner side of the lower fire basin brick 140. The cyclone seat 610 is located on the inner side of the energy-gathering ring 141, and one end of the central air gun 213 passing through the top plate 114 is connected in an annular manner with a plurality of lower gas-dividing bends 510. The furnace combustion outer air gun 260 accounts for 75% of the total fuel, and the ignition head assembly 5 includes an inner liner ring tube 520 arranged on the inner side of the lower fire basin brick 140, and a plurality of lower gas-dividing bends 510 are connected to the inner liner ring tube 520, and a plurality of upper gas-dividing bends 530 are connected in an annular manner on the upper surface of the inner liner ring tube 520, and a plurality of grooves matching the upper gas-dividing bends 530 are opened on the upper end of the energy-gathering ring 141, and the inner nozzles 54 are installed on one end of the plurality of upper gas-dividing bends 530 passing through the grooves near the cyclone seat 610. 0, the outside of the inner nozzle 540 is provided with two inclined holes 541 facing the lower fire basin brick 140, and each inner nozzle 540 has three first-level inclined holes and three second-level inclined holes facing the lower fire basin brick 140. The gas delivered by the first fuel gas delivery pipe 210 flows into the central gas gun 213, rises to the upper end and flows into the lower gas distribution bend pipe 510 respectively, is delivered to the inner lining ring pipe 520, enters into all 530 upper gas distribution bend pipes, and is ejected through the multi-level inclined holes of the inner nozzle 540.

[0026] According to the above technical solution, the pilot lamp 252 is a general component of a general burner. Its function is to always provide a small fire when the burner is running, to ensure that when the burner of the heating furnace is extinguished due to abnormal circumstances, there is an open flame in the furnace to prevent a flash explosion. The tail of the pilot lamp 252 is a threaded joint, which is connected to the pilot lamp gas pipe 220 through a metal hose. The central air gun 213 accounts for 25% of the total fuel. Each inner nozzle 540 has a horizontal horizontal hole facing the cyclone 630 and two inclined holes 541 facing the lower fire basin brick 140.

[0027] According to the above technical solution, a valve meter distribution unit 211 is arranged outside the first gas delivery pipe 210 and the tee 230. The valve meter distribution unit 211 includes a tee, two stop valves, a pressure gauge, a hose connector, etc. Its gas inlet is connected to the main gas pipeline of the heating furnace by welding, and the other two gas outlets are connected to the furnace combustion outer gas gun 260 and the center gas gun 213 respectively through metal hoses. Its main function is to distribute the fuel gas, and the distribution ratio of the center gas gun 213 and the furnace combustion outer gas gun 260 is adjusted by adjusting the opening of the manual valve.

[0028] In a further technical solution, the fuel gas flows to the central air gun 213 and the furnace combustion outer air gun 260 through the three-way 230. 25% of the fuel gas passes through the eight inner nozzles 540 of the central air gun 213, and is mixed with the combustion air through the air regulating butterfly valve 111 and then burns to form a stable inner circle flame. 75% of the fuel gas passes through the eight outer nozzles of the furnace combustion outer air gun 260, and continues to mix and burn with the flue gas after the combustion of the inner air gun. Due to the combination of gas staging technology, flue gas self-circulation technology, and concentrated and diluted combustion technology, NO in the flue gas can be reduced. X Concentration less than 50 mg / m 3 The flames of the central air gun 213 and the furnace combustion outer air gun 260 continue to move forward, merge in the upper fire basin brick 130, and form a high-temperature area in the shrinkage structure of the upper fire basin brick 130, which can fully burn the unburned CO in this high-temperature area, greatly reducing the CO concentration, so that the CO concentration in the flue gas is less than 80mg / m 3 .

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low NOx special for low temperature furnace X Low CO gas burner, characterized by: The invention comprises a cylinder (110), wherein a pretreatment placement assembly (1) is installed at the bottom end of the cylinder (110), wherein the pretreatment placement assembly (1) comprises a base (120) fixedly installed at the bottom end of the cylinder (110), wherein an upper fire basin brick (130) is installed at the upper end of the cylinder (110), wherein a furnace bottom lining (112) is arranged at the upper end of the cylinder (110), wherein the upper fire basin brick (130) corresponds to the furnace bottom lining (112), wherein a top plate (114) is arranged at the upper end of the cylinder (110), wherein a central air gun (213) is vertically installed at the middle of the top plate (114), wherein an air regulating butterfly valve (111) is connected to the outer surface of the cylinder (110), wherein a fixing plate (113) is arranged at the bottom end of the cylinder (110), wherein the fixing plate (113) A permanent lamp gas pipe (220) is inserted and installed on one side of the central air gun (213); a gas intake assembly (2) is fixedly connected to the bottom end of the central air gun (213); a combustion air intake assembly (3) is installed on the upper end of the air regulating butterfly valve (111); a cyclone seat (610) is installed on the upper end of the central air gun (213) through the top plate (114); a lower fire basin brick (140) is arranged on the inner side of the upper fire basin brick (130); an energy focusing ring (141) is arranged on the inner side of the lower fire basin brick (140); the cyclone seat (610) is located on the inner side of the energy focusing ring (141); one end of the central air gun (213) passing through the top plate (114) is annularly connected to a plurality of lower gas distribution bends (510); and an ignition head assembly (5) is arranged on the inner side of the lower fire basin brick (140).

2. A low-NOX and low-CO gas burner dedicated to a low-temperature furnace according to claim 1, characterized in that: A furnace combustion external air gun (260) is vertically installed between the upper fire basin brick (130) and the lower fire basin brick (140); an outer lining ring tube (261) is arranged on the inner side of the lower fire basin brick (140); a plurality of outer nozzles (262) are arranged in an annular manner on the upper surface of the outer lining ring tube (261); the outer nozzles (262) are arranged around the outer ring of the lower fire basin brick (140), around the lower outer ring; a swirl control assembly (6) is arranged in an annular manner on the inner side of the energy focusing ring (141); the swirl control assembly (6) comprises a plurality of swirlers (630) arranged in an annular manner on a swirler seat (610); a pin (660) is hinged on the upper surface of the swirlers (630). The upper portion of the upper fire basin brick (130) is provided with a cyclone regulating assembly (4); the gas intake assembly (2) comprises a docking flange (212) fixedly connected to the bottom end of a central gas gun (213); a first gas delivery pipe (210) is installed at the bottom end of the docking flange (212); an outer gas ring pipe (251) is installed at the bottom of the fixed plate (113); a second gas delivery pipe (250) is fixedly connected to the lower surface of the outer gas ring pipe (251); a tee (230) is commonly connected to the first gas delivery pipe (210) and the second gas delivery pipe (250) at one side corresponding to the other; a main gas pipe (240) is installed at the other end of the tee (230).

3. A low-NO2-free low-temperature furnace according to claim 1 X Low CO gas burner, characterized by: The combustion-supporting air intake assembly (3) comprises a servo motor (310) fixedly mounted on the upper end of an air regulating butterfly valve (111); two rotating rods (320) are inserted and installed on the inner side of the air regulating butterfly valve (111); an output shaft of the servo motor (310) is connected to one of the rotating rods (320); ventilation discs (330) are welded to the two rotating rods (320) located on the inner side of the air regulating butterfly valve (111); and pulleys (340) are fixedly mounted on the bottom ends of the two rotating rods (320) passing through the air regulating butterfly valve (111); the two pulleys (340) are connected to each other via a belt.

4. The low-NOX and low-CO gas burner for low-temperature furnace according to claim 1, characterized in that: The lower portion of the upper fire basin brick (130) is provided with square holes in an annular shape, the number of the square holes being 6 or 8, and the upper portion of the upper fire basin brick (130) is a constricted structure.

5. The low-NOX and low-CO gas burner for low-temperature furnace according to claim 2, characterized in that: A valve-gauge distribution unit (211) is provided outside the first gas delivery pipe (210) and the tee (230), and the valve-gauge distribution unit (211) comprises a gas stop valve and a pressure gauge, which respectively adjust the flow of the central gas gun (213) and the furnace combustion outer gas gun (260).

6. The low-NOX and low-CO gas burner dedicated to a low-temperature furnace according to claim 1, characterized in that: The ignition head assembly (5) comprises an inner lining ring tube (520) arranged on the inner side of the lower fire basin brick (140), a plurality of the lower gas distribution bends (510) are connected to the inner lining ring tube (520), a plurality of upper gas distribution bends (530) are connected in an annular manner to the upper surface of the inner lining ring tube (520), a plurality of grooves matching the upper gas distribution bends (530) are provided at the upper end of the energy focusing ring (141), and an inner nozzle (540) is installed at one end of the plurality of upper gas distribution bends (530) passing through the grooves and close to the cyclone seat (610), and two inclined holes (541) facing the lower fire basin brick (140) are provided on the outside of the inner nozzle (540).

7. The low-NOX and low-CO gas burner dedicated for a low-temperature furnace according to claim 1, characterized in that: The inner side of the energy gathering ring (141) is rotatably connected to a plurality of positioning rods (670); an opening linkage block (640) is fixedly sleeved on the outer surface of the positioning rod (670); a linkage rod (650) is rotatably connected between every two opening linkage blocks (640); a linkage buckle (620) is slidably provided on one side of the opening linkage block (640); and the linkage buckle (620) is connected to a pin shaft (660).

8. The low-NOX and low-CO gas burner dedicated for a low-temperature furnace according to claim 1, characterized in that: The cyclone regulating assembly (4) comprises a control valve (410) arranged on the lower fire basin brick (140), a control steel wire (411) being arranged on the inner side of the control valve (410), the control steel wire (411) passing through the upper fire basin brick (130) and the lower fire basin brick (140) and entering the inner side of the energy gathering ring (141) to be connected with the opening linkage block (640).

9. The low-NOX and low-CO gas burner dedicated to a low-temperature furnace according to claim 2, characterized in that: A permanent lamp (252) is provided between the lower fire basin brick (140) and the energy focusing ring (141), and the permanent lamp (252) passes through the cylinder (110) and is connected to the outer gas ring tube (251).

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