A low-NOx furnace-specific low-NOx material X Low CO gas burner

Abstract

This invention relates to the field of furnace combustion technology, specifically a low-NOx furnace-specific low-NOx combustion method. X A low-CO gas burner includes a cylinder, a pretreatment mounting assembly at the bottom of the cylinder, the pretreatment mounting assembly including a base fixedly mounted at the bottom of the cylinder, an upper fire basin brick mounted at the top of the cylinder, a furnace bottom lining provided at the top of the cylinder with the upper fire basin brick corresponding to the furnace bottom lining, a top plate at the top of the cylinder, a central gas gun vertically mounted in the center of the top plate, an air regulating butterfly valve connected to the outer surface of the cylinder, a fixing plate at the bottom of the cylinder, a continuous light gas pipe inserted through one side of the fixing plate, and a gas intake assembly fixedly connected to the bottom of the central gas gun, which helps to reduce NO in the flue gas. X In addition to reducing the amount of CO generated, the high-temperature zone formed by the constricted structure of the upper fire basin brick can significantly reduce the CO concentration in the flue gas, ensuring the overall treatment effect of the burner.

Description

Technical Field

[0001] This invention relates to the field of furnace combustion technology, specifically a low-NOx furnace-specific low-NOx combustion method. X Low CO gas burner. Background Technology

[0002] A burner is a general term for a device that sprays fuel and air in a specific manner for combustion. Burners are classified into several types based on their application: industrial burners, combustion engines, civil burners, and special burners. They are mostly made of corrosion-resistant and high-temperature-resistant materials such as stainless steel or titanium.

[0003] Currently, based on market dynamics, the trend towards energy-efficient and high-efficiency heating furnaces, and information gathered from various sources, existing low-temperature furnace burners have the following shortcomings in use: Firstly, in the domestic petroleum refining industry, the furnace operating temperature of hydrogenation unit heating furnaces is generally below 650℃, while the ignition point of the combustion intermediate product CO is 650℃. This means that a large amount of unburned CO will be emitted into the atmosphere with the flue gas in the low-temperature furnace, which is detrimental to the energy efficiency of the heating furnace. Even with the use of imported low-NOx burners... X Burners cannot reduce the CO content in flue gas. At the same time, high CO content can easily cause pressure fluctuations in the heating furnace, which is not conducive to the stable operation of the heating furnace.

[0004] Therefore, those skilled in the art provide a low-NOx content specifically for cryogenic furnaces. X A low-CO gas burner is provided to address the problems mentioned in the background section. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a low-NOx content specifically designed for low-temperature furnaces. X Low-CO gas burners solve the problem that in existing hydrogenation unit heaters used in the domestic petroleum refining industry, the furnace operating temperature is generally below 650℃, while the ignition point of the combustion intermediate product CO is 650℃. This results in a large amount of unburned CO being emitted into the atmosphere with the flue gas, which is detrimental to the energy efficiency of the heater. Even with imported low-NOx gas burners... X Burners cannot reduce the CO content in flue gas. At the same time, high CO content can easily cause pressure fluctuations in the heating furnace and affect the stability of the heating furnace.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] The technical solution adopted by this invention to solve its technical problem is: a low-NOx material specifically for low-temperature furnaces. XA low-CO gas burner includes a cylinder, a pretreatment mounting assembly at the bottom of the cylinder, the pretreatment mounting assembly including a base fixedly mounted at the bottom of the cylinder, an upper fire basin brick mounted at the top of the cylinder, a furnace bottom lining at the top of the cylinder with the upper fire basin brick corresponding to the furnace bottom lining, a top plate at the top of the cylinder, a central gas gun vertically mounted in the center of the top plate, an air regulating butterfly valve connected to the outer surface of the cylinder, a fixing plate at the bottom of the cylinder with a continuous light gas pipe inserted through one side of the fixing plate, a gas intake assembly fixedly connected to the bottom of the central gas gun, a combustion air intake assembly mounted at the top of the air regulating butterfly valve, and a cyclone separator seat mounted through the top plate at the top of the central gas gun. The inner side of the furnace is provided with a lower fire basin brick, and the inner side of the lower fire basin brick is provided with an energy-concentrating ring. The cyclone separator seat is located inside the energy-concentrating ring. The end of the central air gun passing through the top plate is connected to multiple lower gas distribution bends in a ring. The inner side of the lower fire basin brick is provided with an ignition head assembly. The furnace combustion external air gun is vertically installed between the upper fire basin brick and the lower fire basin brick. The inner side of the lower fire basin brick is provided with an outer lining ring tube. The upper surface of the outer lining ring tube is provided with several external nozzles in a ring. The external nozzles are located around the outer ring of the lower fire basin brick. The inner side of the energy-concentrating ring is provided with a cyclone control assembly in a ring. The cyclone control assembly includes multiple cyclones arranged in a ring on the cyclone separator seat. The upper surface of the cyclones is hinged with a pin. The upper part of the upper fire basin brick is provided with a cyclone adjustment assembly.

[0008] Preferably, the gas intake assembly includes a docking flange fixedly connected to the bottom of the central gas gun, a first gas delivery pipe is installed at the bottom 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, a tee is connected to the corresponding side of the first gas delivery pipe and the second gas delivery pipe, and a main gas pipe is installed at the other end of the tee.

[0009] Preferably, the combustion air intake assembly includes a servo motor fixedly installed on the upper end of the air regulating butterfly valve. Two rotating rods are inserted and installed inside the air regulating butterfly valve. The output shaft of the servo motor is connected to one of the rotating rods. Ventilation discs are welded to the two rotating rods inside the air regulating butterfly valve. Pulleys are fixedly fitted to the bottom ends of the two rotating rods that pass through the air regulating butterfly valve. The two pulleys are connected by a belt.

[0010] Preferably, the lower part of the upper fire pit brick is provided with square holes in a ring, and the number of square holes is one or more, and the upper part of the upper fire pit brick has a constricted structure.

[0011] Preferably, a valve distribution unit is provided on the outside of the first gas delivery pipe and the tee. The valve distribution unit includes a gas shut-off valve and a pressure gauge, which respectively realize the flow regulation of the central gas gun and the furnace combustion external gas gun.

[0012] Preferably, the ignition head assembly includes an inner lining ring tube disposed inside the lower fire pit brick, a plurality of lower gas distribution bends connected to the inner lining ring tube, a plurality of upper gas distribution bends being annularly connected to the upper surface of the inner lining ring tube, a plurality of grooves matching the upper gas distribution bends being opened at the upper end of the energy focusing ring, and an inner nozzle being installed at the end of the plurality of upper gas distribution bends passing through the grooves and close to the cyclone separator seat, and an oblique hole facing the lower fire pit brick being provided on the outside of the inner nozzle.

[0013] Preferably, the inner side of the energy-concentrating ring is rotatably connected with multiple positioning rods, and an open linkage block is fixedly fitted on the outer surface of the positioning rod. A linkage rod is rotatably connected between every two open linkage blocks, and a linkage buckle is slidably provided on one side of the open linkage block. The linkage buckle is connected to a pin.

[0014] Preferably, the cyclone regulating assembly includes a control valve disposed on the lower fire pit brick, and a control wire is disposed on the inner side of the control valve. The control wire passes through the upper and lower fire pit bricks and enters the inner side of the energy-concentrating ring to connect with the opening linkage block.

[0015] Preferably, a continuous lamp is provided between the lower fire pit brick and the energy-concentrating ring, and the continuous lamp passes through the cylinder and is connected to the outer gas ring pipe.

[0016] The beneficial effects of this invention are:

[0017] 1. The low-NOx content for low-temperature furnaces described in this invention X The low-CO gas burner directs fuel flow through a three-way valve into the central and external gas guns. Following the principles of fuel grading, rich-lean combustion, and internal flue gas recirculation, approximately 25% of the total fuel flow is supplied by the eight internal gas nozzles on the central gas gun. This fuel mixes thoroughly with all the required high-temperature air within the fire pit brick cavity, resulting in oxygen-rich combustion. This effectively lowers the temperature of the primary combustion flame. The mixture of primary combustion flue gas and the remaining high-temperature air then mixes with the remaining 75% of the total fuel flow from the eight external gas nozzles on the external gas gun at the plane above the lower fire pit brick, forming a secondary flame. Due to the high flow velocity of this secondary fuel (approximately 300 m / s), it effectively draws some furnace flue gas into the combustion zone, diluting the oxygen concentration and thus effectively suppressing NO production during combustion. X The amount of NO generated in the emitted flue gas X Concentration at 50 mg / m 3 the following.

[0018] 2. The low-NOx content for low-temperature furnaces described in this invention XThe low-CO gas burner features square holes at the bottom of the upper firebox brick, the number of which matches the number of external nozzles. When the fuel gas from the external gas gun is ejected at high speed, it can carry some of the furnace flue gas into the combustion zone through these holes. The upper part has a constricted structure, forming a high-temperature combustion zone where the intermediate combustion product CO can be fully combusted. The CO concentration in the emitted flue gas is approximately 80 mg / m³. 3 the following.

[0019] 3. The low-NOx content for low-temperature furnaces described in this invention X The low-CO gas burner has a swirler installed on the central air gun. The combustion air flowing out of the swirler and the fuel gas flowing out of the horizontal hole of the central gun nozzle form a strong anti-spray mixture, which makes the fuel gas and combustion air mixed evenly, enhances the stability of the flame, reduces the excess air coefficient, and is conducive to energy saving of the heating furnace.

[0020] 4. The low-NOx content for low-temperature furnaces described in this invention X The low-CO gas burner uses a gas shut-off valve and pressure gauge on a three-way valve to regulate the flow rate of the central and outer gas guns, thereby controlling the amount of flue gas returning to the furnace and indirectly controlling the temperature of the central flame and the temperature of the outer swirling flame. The NO₂ level is adjusted according to operating conditions. x The balance point with CO, achieving low NO x This burner achieves optimal low-CO combustion by employing gas staging, rich-lean combustion, mixing promotion, flue gas recirculation, and NO suppression. X The generated combustion technology measures effectively reduced NO in flue gas. X In addition, the high-temperature zone formed by the constricted structure of the upper fire basin brick can significantly reduce the CO concentration in the flue gas, ensuring the best performance of the burner. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure of the central base;

[0024] Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure of the middle cylinder and the upper fire pit bricks;

[0025] Figure 4 For the present invention Figure 3 Cross-sectional view of the internal structure of the upper and lower fire pit bricks;

[0026] Figure 5For the present invention Figure 4 Schematic diagram of the cross-sectional structure of the ignition head assembly;

[0027] Figure 6 For the present invention Figure 4 Top view of the vortex control assembly;

[0028] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point A in the middle;

[0029] Figure 8 For the present invention Figure 1 Schematic diagram of the front view structure;

[0030] Figure 9 For the present invention Figure 1 Mid-top view of the structure.

[0031] In the picture:

[0032] 1. Pre-treatment and placement components;

[0033] 110. Cylinder body; 111. Air regulating butterfly valve; 112. Furnace bottom lining; 113. Fixing plate; 114. Top plate; 120. Base; 130. Upper fire basin brick; 140. Lower fire basin brick; 141. Energy-concentrating ring;

[0034] 2. Gas intake assembly;

[0035] 210. First gas delivery pipe; 211. Valve and meter distribution unit; 212. Connecting flange; 213. Central gas gun;

[0036] 220. Gas pipe for continuous lighting; 230. Tee; 240. Main gas pipe; 250. Second gas delivery pipe; 251. External gas ring pipe; 252. Continuous lighting; 260. External gas gun for furnace combustion; 261. External lining ring pipe; 262. External nozzle;

[0037] 3. Combustion air intake assembly;

[0038] 310. Servo motor; 320. Rotary rod; 330. Ventilation disc; 340. Pulley;

[0039] 4. Cyclone regulating component;

[0040] 410. Control valve; 411. Control wire;

[0041] 5. Ignition head assembly;

[0042] 510. Lower air distribution bend; 520. Inner lining ring pipe; 530. Upper air distribution bend; 540. Inner nozzle; 541. Angled hole;

[0043] 6. Swirl control assembly;

[0044] 610. Hydrocyclone seat; 620. Linkage buckle; 630. Hydrocyclone; 640. Opening linkage block; 650. Linkage rod; 660. Pin; 670. Positioning rod. Detailed Implementation

[0045] This invention provides a low-NOx content specifically for low-temperature furnaces. X Low-CO gas burners solve the problem that in existing hydrogenation unit heaters used in the domestic petroleum refining industry, the furnace operating temperature is generally below 650℃, while the ignition point of the combustion intermediate product CO is 650℃. This results in a large amount of unburned CO being emitted into the atmosphere with the flue gas in the low-temperature furnace, which is detrimental to energy conservation in the heater. Even with imported low-NOx gas burners... X Burners cannot reduce the CO content in flue gas. At the same time, high CO content can easily cause pressure fluctuations in the heating furnace and affect the stability of the heating furnace.

[0046] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figures 1-9 As shown, this invention provides a low-NOx content specifically for low-temperature furnaces. XA low-CO gas burner includes a cylinder 110. A pretreatment mounting assembly 1 is installed at the bottom of the cylinder 110. The pretreatment mounting assembly 1 includes 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 provided at the upper end of the cylinder 110, with the upper fire basin brick 130 corresponding to the furnace bottom lining 112. A top plate 114 is provided at the upper end of the cylinder 110, and a central air gun 213 is vertically installed in the middle of the top plate 114. An air regulating device is connected to the outer surface of the cylinder 110. A butterfly valve 111 and a cylinder 110 have a fixed plate 113 at the bottom. A continuous 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 of the central air gun 213. An auxiliary combustion air intake assembly 3 is installed at the upper end of the regulating butterfly valve 111. A cyclone separator seat 610 is installed at the upper end of the central air gun 213 through the top plate 114. A lower fire pit brick 140 is installed inside the upper fire pit brick 130. An energy-concentrating ring 141 is installed inside the lower fire pit brick 140. The cyclone separator seat 610 is located on the energy-concentrating ring 141. Inside 41, the central air gun 213 passes through the top plate 114 and is connected in a ring to multiple lower gas distribution bends 510. An ignition head assembly 5 is installed inside the lower fire basin brick 140. 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 pipe 261 is installed inside the lower fire basin brick 140. Several external nozzles 262 are arranged in a ring on the upper surface of the outer lining ring pipe 261. The external nozzles 262 are located around the outer perimeter of the lower fire basin brick 140. A rotating ring is arranged in a ring on the inner side of the energy-concentrating ring 141. The flow control component 6 includes multiple cyclones 630 arranged in a ring on the cyclone seat 610. A pin 660 is hinged to the upper surface of each cyclone 630. A cyclone regulating component 4 is installed on the upper part of the upper fire pit brick 130. The cylinder 110 has a hollow cup-shaped structure and serves as the main carrier for installing other components. It is fixed to the furnace bottom plate of the heating furnace via an external steel flange. The outer wall of the cylinder 110 is made of steel plate, and an insulation layer is installed inside to prevent heat from the flame or preheated air from being conducted to the outer wall during operation. An air regulating butterfly valve 111 has an air regulating handle; rotating the external handle controls the valve plate opening, thereby controlling the combustion air volume.

[0048] A further technical solution is provided: the fixed plate 113 is provided with an insulation layer, and its bottom end plate is provided with many round holes. The central round hole is fixed to the central air gun 213 by welding. The continuous light 252 passes through the corresponding round hole and sleeve, and is installed and fixed to the bottom end plate of the fixed plate 113 by a flange. The bottom end of the fixed plate 113 is provided with multiple round holes, and the round holes are respectively installed with ignition holes and observation holes.

[0049] A further technical solution involves welding the cyclone separator 630 to the top of the central air gun 213. Through an external control valve 410, the control wire 411 is driven to pull the traction opening linkage block 640 to swing, thereby driving the linkage rod 650 to move simultaneously. This causes the linkage buckle 620 to move, driving the pin shaft 660 to move, further driving the cyclone separator 630 to adjust the air intake. The combustion air flowing out of the cyclone separator 630 and the fuel gas flowing out of the horizontal hole of the central gun nozzle form a strong mixing reaction, forming a stable flame.

[0050] A further technical solution is that the upper fire basin brick 130 is made of refractory castable and placed on the furnace bottom lining 112. Its lower part is provided with 8 square holes to facilitate the flow of flue gas in the furnace; its upper part is a constricted structure, which is the flame gathering section.

[0051] A further technical solution involves a lower fire basin brick 140 located inside the upper fire basin brick 130, a concentrating ring 141 located inside the lower fire basin brick 140, a cyclone separator seat 610 located inside the concentrating ring 141, and a central air gun 213 connected annularly to one end of the top plate 114 by multiple lower gas distribution bends 510. The external air gun 260 in the furnace accounts for 75% of the total fuel. The ignition head assembly 5 includes an inner lining ring tube 520 located inside the lower fire basin brick 140, multiple lower gas distribution bends 510 connected to the inner lining ring tube 520, and multiple upper gas distribution bends 530 annularly connected to the upper surface of the inner lining ring tube 520. The upper end of the concentrating ring 141 has several grooves matching the upper gas distribution bends 530, and each upper gas distribution bend 530 has an inner nozzle 54 installed at the end near the cyclone separator seat 610 through the groove. 0. The inner nozzle 540 has two oblique holes 541 facing the lower fire pit brick 140 on its exterior. Each inner nozzle 540 has three first-level oblique holes facing the lower fire pit brick 140 and three second-level oblique holes facing the lower fire pit brick 140. The gas delivered by the first gas delivery pipe 210 is circulated into the central air gun 213, rises to the upper end and flows into the lower gas distribution bend pipe 510, is delivered into the inner lining ring pipe 520 and enters all the upper gas distribution bend pipes 530, and is sprayed out through the multi-level oblique holes of the inner nozzle 540.

[0052] The aforementioned technical solution utilizes a continuous flame lamp 252, a common component in general burners. Its function is to provide a small flame at all times during burner operation, ensuring that an open flame remains in the furnace even if the burner extinguishes due to an abnormality, thus preventing a flash explosion. The tail of the continuous flame lamp 252 is a threaded connector, connected to the continuous flame lamp gas pipe 220 via a metal flexible hose. The central gas gun 213 accounts for 25% of the total fuel, and each inner nozzle 540 has one horizontal hole facing the cyclone separator 630 and two oblique holes 541 facing the lower fire basin brick 140.

[0053] To address the aforementioned technical solution, a valve distribution unit 211 is installed on the outside of the first gas delivery pipe 210 and the tee 230. The valve distribution unit 211 includes a tee pipe, two shut-off valves, a pressure gauge, and hose connectors. Its gas inlet is connected to the main gas pipeline of the heating furnace via welding, and its two gas outlets are connected to the outer gas gun 260 and the central gas gun 213 of the furnace combustion chamber via metal hoses, respectively. Its main function is to distribute the fuel gas, and the distribution ratio between the central gas gun 213 and the outer gas gun 260 of the furnace combustion chamber is adjusted by regulating the opening degree of the manual valve.

[0054] A further technical solution involves the fuel gas flowing through a three-way valve 230 to the central gas gun 213 and the furnace combustion external gas gun 260. 25% of the fuel gas passes through the eight inner nozzles 540 of the central gas gun 213, mixing with the combustion air via the regulating butterfly valve 111 before combustion to form a stable inner ring flame. The remaining 75% of the fuel gas passes through the eight outer nozzles of the furnace combustion external gas gun 260, continuing to mix and burn with the flue gas from the internal gas gun combustion. This combination of gas staged combustion technology, flue gas self-circulation technology, and rich-lean combustion technology reduces the amount of NO in the flue gas. X Concentration below 50 mg / m 3 The combustion flames of the central air gun 213 and the outer air gun 260 in the furnace continue forward, converging within the upper fire basin brick 130 and forming a high-temperature zone within the constricted structure of the upper fire basin brick 130. This high-temperature zone allows for the complete combustion of unburned CO, significantly reducing the CO concentration and ensuring that the CO concentration in the flue gas is below 80 mg / m³. 3 .

[0055] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-NOx material specifically for low-temperature furnaces X A low-CO gas burner, characterized in that: The application relates to a cylinder (110) which is provided with a pretreatment arrangement (1) at the bottom end, a top fire pan brick (130) at the upper end, a furnace bottom lining (112) at the upper end, a top plate (114) at the upper end, a center air gun (213) vertically arranged at the middle of the top plate (114), an air regulating butterfly valve (111) connected to the outer surface of the cylinder (110), a fixed disc (113) arranged at the bottom end of the cylinder (110), a long-lasting light gas pipe (220) arranged at one side of the fixed disc (113), a gas inlet assembly (2) fixedly connected to the bottom end of the center air gun (213), a combustion-supporting air inlet assembly (3) arranged at the upper end of the air regulating butterfly valve (111), a cyclone seat (610) arranged at the upper end of the center air gun (213) and penetrating through the top plate (114), a lower fire pan brick (140) arranged at the inner side of the top fire pan brick (130), an energy-gathering ring (141) arranged at the inner side of the lower fire pan brick (140), the cyclone seat (610) being arranged at the inner side of the energy-gathering ring (141), a plurality of lower gas distribution elbows (510) annularly connected to one end of the center air gun (213) and penetrating through the top plate (114), a spark head assembly (5) arranged at the inner side of the lower fire pan brick (140), a furnace combustion outer air gun (260) vertically arranged between the top fire pan brick (130) and the lower fire pan brick (140), an outer lining ring pipe (261) arranged at the inner side of the lower fire pan brick (140), a plurality of outer nozzles (262) annularly arranged at the upper surface of the outer lining ring pipe (261), the outer nozzles (262) being arranged at the outer periphery of the lower fire pan brick (140), a cyclone control assembly (6) annularly arranged at the inner side of the energy-gathering ring (141), the cyclone control assembly (6) comprising a plurality of cyclones (630) annularly arranged on the cyclone seat (610), a pin shaft (660) hinged to the upper surface of the cyclone (630), a cyclone adjusting assembly (4) arranged at the upper part of the top fire pan brick (130), the gas inlet assembly (2) comprising a butt flange (212) fixedly connected to the bottom end of the center air gun (213), a first gas conveying pipe (210) arranged at the bottom end of the butt flange (212), an outer air ring pipe (251) arranged at the lower part of the fixed disc (113), a second gas conveying pipe (250) fixedly connected to the lower surface of the outer air ring pipe (251), a tee joint (230) connected to one side of the first gas conveying pipe (210) and the second gas conveying pipe (250) in correspondence, and a total gas pipe (240) arranged at the other end of the tee joint (230).The ignition head assembly (5) comprises an inner lining ring pipe (520) arranged inside a lower fire pan brick (140), a plurality of lower gas distribution bends (510) are communicated with the inner lining ring pipe (520), a plurality of upper gas distribution bends (530) are annularly connected to the upper surface of the inner lining ring pipe (520), a plurality of recesses matched with the upper gas distribution bends (530) are formed in the upper end of the energy gathering ring (141), an inner nozzle (540) is arranged at the end of each upper gas distribution bend (530) close to the cyclone seat (610), and two inclined holes (541) are arranged outside the inner nozzle (540) and face the lower fire pan brick (140).

2. A low-NOx burner for low-temperature furnaces according to claim 1, characterized in that the primary air is introduced into the burner through the primary air inlet (5) and the secondary air is introduced into the burner through the secondary air inlet (6). X A low CO gas burner, characterized by: The combustion-supporting air intake assembly (3) comprises a servo motor (310) fixedly installed on the upper end of the air regulating butterfly valve (111), two rotating rods (320) are installed in the inner side of the air regulating butterfly valve (111), the output shaft of the servo motor (310) is connected with one of the rotating rods (320), the two rotating rods (320) are welded with the ventilation butterfly (330) on the inner side of the air regulating butterfly valve (111), and the two rotating rods (320) are fixedly sleeved with belt pulleys (340) through the bottom end of the air regulating butterfly valve (111).

3. A low-NOx burner for low-temperature furnaces according to claim 1, characterized in that the primary air is injected through the primary air injection holes (5) and the secondary air is injected through the secondary air injection holes (6). X Low-CO gas burner, characterized by: The lower part of the upper fire pot brick (130) is annularly provided with square holes, the number of the square holes is 6 or 8, and the upper part of the upper fire pot brick (130) is of a necked structure.

4. A low-NOx burner for low-temperature furnaces according to claim 1, characterized in that the primary air is injected into the combustion chamber through the primary air injection means (5) and the secondary air is injected into the combustion chamber through the secondary air injection means (6). X Low-CO gas burner, characterized by the fact that: The first gas conveying pipe (210) and the outer side of the tee joint (230) are provided with a valve table distribution unit (211), the valve table distribution unit (211) comprises a gas cut-off valve and a pressure gauge, and flow regulation of the central air gun (213) and the furnace combustion outer air gun (260) is realized respectively.

5. A low-NOx burner for low-temperature furnaces according to claim 1, characterized in that the primary air is injected through the primary air injection holes (5) and the secondary air is injected through the secondary air injection holes (6). X Low-CO gas burner, characterized by the fact that: The inner side of the energy-gathering ring (141) is annularly rotationally connected with a plurality of positioning rods (670), the outer surface of the positioning rod (670) is fixedly sleeved with an open linkage block (640), every two open linkage blocks (640) are rotationally connected with a linkage rod (650), one side of the open linkage block (640) is slidably provided with a linkage buckle (620), and the linkage buckle (620) is connected with a pin shaft (660).

6. A low-NOx furnace-specific low-NOx material according to claim 5 X A low-CO gas burner, characterized in that: The cyclone adjusting assembly (4) comprises a control valve (410) arranged on the lower fire pot brick (140), the inner side of the control valve (410) is provided with a control steel wire (411), the control steel wire (411) passes through the upper fire pot brick (130) and the lower fire pot brick (140) and is connected with the open linkage block (640) in the inner side of the energy-gathering ring (141).

7. A low-NOx burner for low-temperature furnaces according to claim 1, characterized in that the primary air is injected through the primary air injection holes (5) and the secondary air is injected through the secondary air injection holes (6). X Low-CO gas burner, characterized by the fact that: The lower fire pot brick (140) and the energy-gathering ring (141) are provided with a permanent light (252), and the permanent light (252) communicates with the outer air ring pipe (251) through the cylinder (110).

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