CN215112593U

CN215112593U - Circular flame ultra-low NOx burner for oil refining chemical device

Info

Publication number: CN215112593U
Application number: CN202121066047.XU
Authority: CN
Inventors: 杜俊; 犹乐骏; 乔杰锋
Original assignee: Changsha Xinzhong Petrochemical Equipment Co ltd
Current assignee: Changsha Xinzhong Petrochemical Equipment Co ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-12-10
Anticipated expiration: 2031-05-19

Abstract

Circular flame ultralow NO for oil refining chemical device_xA burner belongs to the technical field of burners for oil refining chemical equipment. The method is characterized in that: the gas outlet end of the fuel gas pipe is communicated with the bottom of the pressure stabilizing tank (17), the burner is arranged at the top of the pressure stabilizing tank (17) and communicated with the pressure stabilizing tank (17), and a one-way valve is arranged between the bottom of the pressure stabilizing tank (17) and the fuel gas pipe(19) The air supply pipe (20) is also communicated with the pressure stabilizing tank (17), a pressure stabilizing valve (21) is arranged between the air supply pipe (20) and the pressure stabilizing tank (17), and the pressure stabilizing valve (21) is conducted when the pressure in the pressure stabilizing tank (17) is less than the pressure in the air supply pipe (20). The utility model discloses can maintain gas pressure's stability, make nozzle spun gas stable, guarantee the flame stabilization of gas, eliminate gas pressure unstability and to the influence that gas combustion caused, when the gas pipe takes place to damage and leaks, still can maintain the normal gas that sprays of nozzle, combustor job stabilization.

Description

Circular flame ultra-low NOx burner for oil refining chemical device

Technical Field

Circular flame ultralow NO for oil refining chemical device_xA burner belongs to the technical field of burners for oil refining chemical equipment.

Background

The burner is a general name of a device which sprays and mixes (or sprays and mixes) fuel and air in a certain mode for combustion, and an industrial burner is commonly called a burner, has various types and specifications, and has several categories of fuel oil, gas (coal gas) and coal (coal powder/coal water slurry). The application fields are wide, and the combustor is required in industrial occasions where fuel needs to be combusted to heat materials or react.

With the increasingly strict environmental protection requirements of China, NO is treated_xIs less than or equal to 100mg/m³The existing burner is difficult to meet the national environmental protection requirement. In addition, set up the nozzle on the gas pipe in the combustor usually, the gas pipe is spout the combustion chamber burning with the gas through the nozzle, but the pressure that the gas was carried in the gas pipe can have undulantly at present, leads to nozzle spun gas stability relatively poor, leads to gas combustion's stability relatively poor, makes the flame unstable of gas. In addition, if the gas pipe is damaged to cause leakage, the gas is easy to burn in the area outside the combustion chamber, and the performance of the combustor is affected.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide one kind and can guarantee that nozzle spun gas is stable, guarantee the flame stability of gas, and avoid the gas to be in the oil refining chemical plant for regional burning outside the combustion chamber circular flame ultralow NO_xA burner.

The utility model provides a technical scheme that its technical problem adopted is: the oil refining chemical device uses the circular flame with ultra-low NO_xThe combustor comprises a combustor main body, a gas pipe and an air adjusting butterfly valve, wherein the air adjusting butterfly valve is arranged on one side of the bottom of the combustor main body, the gas pipe extends into a combustion chamber of the combustor main body to be combustedThe nozzle is installed at tracheal top, its characterized in that: the gas pipe is communicated with the bottom of the pressure stabilizing tank, the burner is arranged at the top of the pressure stabilizing tank and communicated with the pressure stabilizing tank, a one-way valve is arranged between the bottom of the pressure stabilizing tank and the gas pipe, the gas pipe is also communicated with the pressure stabilizing tank, a pressure stabilizing valve is arranged between the gas pipe and the pressure stabilizing tank, and the pressure stabilizing valve is switched on when the pressure in the pressure stabilizing tank is smaller than the pressure in the gas pipe.

Preferably, the pressure stabilizing valve comprises a valve body, a valve core and a spring, wherein a conical cavity with the diameter gradually increasing along the airflow direction is arranged in the valve body, the valve core and the spring are both arranged in the valve body, the spring is in a compressed state, and the spring is connected with the valve core and pushes the valve core to tightly press the conical cavity. The spring promotes the valve core and compresses tightly the toper chamber, seals the valve body, and when the pressure in the air supplement pipe was equal with the pressure in the surge tank, the effect of spring made between air supplement pipe and the surge tank turn-offs, when surge tank decompression to reach a certain pressure difference between the air supplement pipe, the gas in the air supplement pipe promotes the valve core motion, and opens the toper chamber, makes the gas enter into in the surge tank, guarantees that pressure in the surge tank maintains steadily.

Preferably, the middle part of the surge tank is provided with a blocking cover, and the blocking cover is a cone with the diameter gradually reduced from bottom to top. The blocking cover can block the gas that the gas pipe sent into, avoids the gas pipe to spout into the gas stability that the gas injection of nozzle influences in the surge tank.

Preferably, the gas pipe include outer gas pipe and interior gas pipe, the top setting of outer gas pipe is in the combustion chamber outside, the top setting of interior gas pipe is in the combustion chamber, outer gas pipe and interior gas pipe's top all are provided with the nozzle. The burner adopts the sectional combustion and flue gas recirculation technology, so that the central temperature of the flame is effectively reduced, and N is restrained₂And O₂Combustion to form NO_xThe high temperature area of the exhaust gas reduces NO in the exhaust gas_xConcentration, when only burning fuel gas, the burner can control NO in flue gas_xAverage concentration of 35mg/Nm or less³(ii) a The load regulation ratio can reach 5: 1.

preferably, the bottom of combustor main part be provided with the distributing pipe, the distributing pipe passes through metal collapsible tube and gas pipe intercommunication, metal collapsible tube one end and distributing pipe intercommunication, the other end passes through butt joint and gas pipe intercommunication.

Preferably, the butt joint include public head, female head and coupling nut, the one end of public head stretches into female head in to with female first sealing connection, coupling nut and the rotatable connection of public head, coupling nut and female first threaded connection. The butt joint between the male head and the female head is convenient, and the metal hose is convenient to replace.

Preferably, a convex sealing platform is arranged around the middle part of the male head, and a sealing gasket is arranged between the end part of the female head and the sealing platform. The sealing gasket can seal between the female head and the sealing platform, and leakage between the male head and the female head is avoided.

Preferably, one end, far away from the female head, of the connecting nut is provided with an inner flanging, and the inner flanging of the connecting nut compresses the sealing platform and the female head tightly. The connecting nut is in threaded connection with the female head, and the sealing platform is tightly pressed at the end part of the female head through the inward flanging, so that the butt joint between the male head and the female head is reliable.

Preferably, the female head is close to the internal diameter of the one end of public head and is greater than the internal diameter of the other end, forms the sealing portion that reduces along the direction diameter of keeping away from public head gradually in the middle part of female head, the tip of public head is provided with flexible pad, flexible pad compresses tightly sealing portion. The flexible pad is tightly attached to the sealing part, so that the sealing between the male head and the female head is realized, and the leakage between the male head and the female head is avoided.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

the oil refining chemical plant uses the ultra-low NO of round flame_xBe provided with the surge tank between the gas pipe of combustor and the nozzle, can maintain the stability of gas pressure, make nozzle spun gas stable, and then guarantee the flame stabilization of gas, eliminated gas pressure unstability and to the influence that gas combustion caused, and when the pressure in the surge tank reduces, the air supplement pipe communicates with the surge tank, and for surge tank supplementary gas, make the gas pressure in the surge tank maintain stably, the check valve can avoid burning in the surge tank to burnThe gas flows into the gas pipe reversely, and when the gas pipe is damaged and leaked, the normal gas injection of the burner can be still maintained, and the stable work of the burner is ensured.

Drawings

FIG. 1 shows the ultra-low NO of the circular flame for oil refining chemical plant_xA schematic front view cross-sectional view of a burner.

Fig. 2 is a front cross-sectional schematic view of a docking head.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic sectional front view of a burner.

FIG. 5 is a front cross-sectional schematic view of a pressure maintaining valve.

In the figure: 1. the device comprises a cylinder body 2, a pilot burner 3, an outer gas pipe 4, an air adjusting butterfly valve 5, an inner gas pipe 6, a burner 7, a combustion chamber 8, a distribution pipe 9, a female head 901, a female head connecting part 902, a sealing part 10, a male head 1001, a sealing table 1002, a male head connecting part 1003, an installing part 11, a connecting nut 12, a sealing gasket 13, a connecting rod 14, a flexible gasket 15, a pressing ring 16, an elastic retainer ring 17, a pressure stabilizing tank 18, a blocking cover 19, a one-way valve 20, a gas supplementing pipe 21, a pressure stabilizing valve 22, a valve body 2201, a conical cavity 23, a valve core 24 and a spring.

Detailed Description

Fig. 1 to 5 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 5.

Circular flame ultralow NO for oil refining chemical device_xThe combustor, including the combustor main part, gas pipe and air regulation butterfly valve 4, air regulation butterfly valve 4 sets up in bottom one side of combustor main part, the gas pipe stretches into in the combustion chamber 7 of combustor main part, nozzle 6 is installed at the top of gas pipe, still include surge tank 17 and air supplement pipe 20, the end of giving vent to anger of gas pipe communicates with the bottom of surge tank 17, the nozzle sets up at the top of surge tank 17 and communicates with surge tank 17, be provided with check valve 19 between the bottom of surge tank 17 and the gas pipe, air supplement pipe 20 also communicates with surge tank 17, be provided with surge valve 21 between air supplement pipe 20 and the surge tank 17, and pressure in surge tank 17 is less than the pressure when the pressure in surge tank 20 and valve 21 switches on. Original mixCircular flame ultralow NO for oil chemical device_xBe provided with surge tank 17 between the gas pipe of combustor and nozzle 6, can maintain the stability of gas pressure, make nozzle 6 spun gas stable, and then guarantee the flame stabilization of gas, eliminated gas pressure unstability and to the influence that gas combustion caused, and when the pressure in surge tank 17 reduces, air supplement pipe 20 and surge tank 17 intercommunication, and for surge tank 17 supplementary gas, make the gas pressure in surge tank 17 maintain stably, check valve 19 can avoid in the surge tank 17 gas reverse flow to the gas pipe, when the gas pipe takes place to damage and leaks, still can maintain the nozzle 6 normal injection gas, guarantee combustor job stabilization.

The present invention is further described with reference to specific embodiments, however, it will be understood by those skilled in the art that the detailed description given herein with respect to the drawings is for better explanation and that the present invention is necessarily to be construed as limited to those embodiments, and equivalents or common means thereof will not be described in detail but will fall within the scope of the present application.

Specifically, the method comprises the following steps: as shown in fig. 1: the combustor main part includes barrel 1 and the combustion chamber 7 on upper portion of lower part, combustion chamber 7 is the drum of being built by the fire pan brick, the vertical setting of barrel 1, the drum coaxial coupling that barrel 1's upper end and fire pan brick were built, the upper portion of the drum that the fire pan brick was built is the toper that reduces gradually by lower supreme external diameter, and the top inner chamber of the drum that the fire pan brick was built is the toper that reduces gradually by lower supreme diameter, the top of the drum that the fire pan brick was built is provided with the passageway, the passageway is for invering "T" shape, the tip of the vertical portion of passageway and the top intercommunication of the drum that the fire pan brick was built, the both ends of the horizontal part of passageway communicate with the inside and outside both sides of the drum that the fire pan brick was built respectively. Be provided with pilot burner 2 in the combustor main part, the bottom coaxial arrangement of combustor main part has distributing pipe 8, and air adjusting butterfly valve 4 sets up on the bottom right side of combustor main part, and air adjusting butterfly valve 4 and combustor main part inner chamber intercommunication to the adjustable air that enters into in the combustor main part.

The gas pipe includes interior gas pipe 5 and outer gas pipe 3, and the vertical setting of outer gas pipe 3 is in combustor main part 1, and the combustor main part is stretched out to the lower extreme of outer gas pipe 3 to be linked together through metal collapsible tube and distributing pipe 8, the upper portion setting of outer gas pipe 3 is outside the drum that the fire basin brick was built, and the nozzle 6 is installed to the upper end of outer gas pipe 3, and with gas injection to combustion chamber 7. Internal gas pipe 5 and outer gas pipe 3 one-to-one, internal gas pipe 5 sets up in the combustor main part, and in the upper end of internal gas pipe 5 stretched into the drum that the fire pan brick was built, the lower extreme of internal gas pipe 5 and the middle part intercommunication of the outer gas pipe 3 that corresponds, nozzle 6 is also installed to the tip of internal gas pipe 5 to spout the gas in the drum that the fire pan brick was built. The outer gas pipes 3 are uniformly distributed around the burner main body at intervals.

The passages are in one-to-one correspondence with the outer gas pipes 3 and are arranged opposite to the corresponding outer gas pipes 3.

The distribution pipe 8 is communicated with each outer gas pipe 3 through a metal hose, one end of the metal hose is communicated with the distribution pipe 8 through a butt joint, and the other end of the metal hose is communicated with the outer gas pipes 3 through the butt joint.

As shown in FIGS. 2 to 3: the butt joint comprises a female joint 9, a male joint 10 and a connecting nut 11, wherein the outer diameter of the upper end of the female joint 9 is smaller than that of the lower end of the female joint, a female joint connecting part 901 is formed at the top of the female joint 9, and threads are arranged on the outer wall of the lower part of the female joint 9. The middle part that encircles public head 10 is provided with seal platform 1001, the lower extreme of public head 10 is provided with public first connecting portion 1002, the upper end of public head 10 stretches into in female head 9, and be provided with sealed pad 12 between female head 9's lower terminal surface and the seal platform 1001, coupling nut 11's bottom is provided with inside turn-ups, coupling nut 11 cover is established outside seal platform 1001, female head 9's lower part stretches into in coupling nut 11, and with coupling nut 11 threaded connection, coupling nut 11's turn-ups compresses tightly seal platform 1001 on female head 9's lower terminal surface, make female head 9's lower terminal surface and seal platform 1001 cooperate the pressure seal pad 12, sealed effectual between female head 9 and the seal platform 1001 is guaranteed.

The internal diameter of the lower end of female head 9 is greater than the internal diameter of upper end to at the middle part of female head 9 formation from bottom to top diameter taper seal portion 902 that reduces gradually, the external diameter on the top of public head 10 is less than the external diameter of lower part, and form installation department 1003 on the top of public head 10, installation department 1003 overcoat is equipped with flexible pad 14, flexible pad 14 and public head 10 coaxial arrangement, the coaxial clamp ring 15 that is provided with of upside of flexible pad 14, the external diameter of clamp ring 15 is less than the external diameter of flexible pad 14, and be provided with elastic collar 16 between flexible pad 14 and the public head 10, thereby realized clamp ring 15 and flexible pad 14's fixed. The male portion 10 extends into the female portion 9 and the flexible pad 14 engages the sealing portion 902, thereby sealing the upper end of the male portion 10 against the sealing portion 902.

Form the second grade between public head 10 and female 9 and seal, guarantee that sealed effectual between public head 10 and the female 9 avoids taking place to leak between public head 10 and the female 9.

As shown in fig. 4: all be provided with surge tank 17 between each gas pipe and the nozzle 6 that corresponds, the vertical setting of surge tank 17, the top installation nozzle 6 of surge tank 17, and the top of surge tank 17 is linked together with nozzle 6. The bottom of the pressure stabilizing tank 17 is communicated with a corresponding gas pipe. Be provided with in surge tank 17 and block cover 18, block cover 18 and set up in the middle part of surge tank 17, block cover 18 and link to each other through connecting rod 13 and surge tank 17's inner wall, and connecting rod 13 encircles surge tank 17 interval equipartition and has a plurality of roots, and the edge of blocking cover 18 sets up with surge tank 17's inner wall interval. The blocking cover 18 is a cone with a diameter gradually reduced from bottom to top, so that the gas entering the pressure stabilizing tank 17 from the gas pipe is prevented from influencing the gas sprayed from the burner 6.

The left side of the surge tank 17 is connected with an air supply pipe 20, the air supply pipe 20 is communicated with the lower portion of the surge tank 17, a pressure stabilizing valve 21 is arranged between the air supply pipe 20 and the surge tank 17, a one-way valve 19 is arranged between the gas pipe and the surge tank 17, the one-way valve 19 can prevent gas in the surge tank 17 from entering the gas pipe, and the pressure stabilizing valve 21 can be conducted when the pressure in the surge tank 17 is lower than the pressure in the air supply pipe 20, so that the air supply pipe 20 supplies the gas into the surge tank 17, and the pressure stability of the gas in the surge tank 17 is ensured.

As shown in fig. 5: the surge damping valve 21 comprises a valve body 22, a valve core 23 and a spring 24, wherein a conical cavity 2201 with the inner diameter gradually increasing along the air flow direction is arranged in the valve body 22, the valve core 23 and the spring 24 are sequentially arranged on the right side of the conical cavity 2201, the valve core 23 is spherical, the spring 24 is in a compression state, the right end of the spring 24 is supported on the valve body 22, the left end of the spring is connected with the valve core 23, and the valve core 23 is pushed to press the conical cavity 2201, so that the valve core 23 and the conical cavity 2201 are sealed.

When the valve is used, the left end of the valve body 22 is communicated with the air supply pipe 20, the right end is communicated with the pressure stabilizing tank 17, and when the pressure in the pressure stabilizing tank 17 is equal to or greater than the pressure in the air supply pipe 20, the valve core 23 and the conical cavity 2201 are always sealed due to the existence of the spring 24. When the pressure in the surge tank 17 becomes small and the pressure difference between the surge tank 17 and the air supply pipe 20 reaches a specified value, the gas in the air supply pipe 20 pushes the valve element 23 to move rightwards, and the gas enters the surge tank 17, so that the pressure stability of the gas in the surge tank 17 is ensured. The air supplement pipe 20 may communicate with the distribution pipe 8.

The burner adopts an outlet contraction type combustion chamber structure, not only realizes the radiation heat transfer in the radiation section of the heating furnace generally, but also increases forced convection to strengthen the convection heat transfer, so that the surface heat intensity of the furnace tube is greatly improved, the surface of the furnace tube is heated more uniformly, the purpose of improving the total effective heat load of the heating furnace is achieved, and the processing capacity of the heating furnace can be improved to a greater degree; meanwhile, due to the form of middle air supply, the compressed and rapidly expanded combustion-supporting air is ejected out of the fire pan brick opening at a high speed to form a negative pressure area at the fire pan brick opening, and thus, the internal circulation of the flue gas is realized.

The burner adopts the sectional combustion and flue gas recirculation technology, so that the central temperature of the flame is effectively reduced, and N is restrained₂And O₂Combustion to form NO_xThe high temperature area of the exhaust gas reduces NO in the exhaust gas_xConcentration, when only burning fuel gas, the burner can control NO in flue gas_xAverage concentration of 35mg/Nm or less³(ii) a The load regulation ratio can reach 5: 1.

the fire basin brick is provided with a plurality of channels, and double-layer circular flame is formed on the inner ring and the outer ring of the fire basin brick. The burner of the outer gas pipe 3 sprays the gas to the direction of the combustion chamber 7, the gas and the air are divided into trickle, the contact area of two air flows is increased, the meeting condition of the gas and the air is improved, the inner gas and the outer gas form double-layer flame, the combustion process is strengthened, and the inner gas and the outer gas form double-layer flameThe temperature of flame of the inner layer in the air duct is lowered, and meanwhile, the secondary fuel is ignited after the smoke of the inner combustion air pipe 5 is refracted and reflowed, so that the flame stabilizing effect is achieved. The smoke after refraction and backflow and the secondary fuel gas form impact mixing, the mixing of the secondary fuel gas and the smoke is strengthened, the retention time of the burning smoke in a burning area is greatly shortened, and NO is effectively inhibited_xAnd (4) generating.

Burner capable of controlling NO in flue gas_xAverage concentration of 35mg/Nm or less³The average concentration of CO is not more than 50mg/Nm³Far below the national standard.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. Circular flame ultralow NO for oil refining chemical device_xThe combustor, including combustor main part, gas pipe and accent wind butterfly valve (4), accent wind butterfly valve (4) set up in bottom one side of combustor main part, and in combustion chamber (7) of combustor main part were stretched into to the gas pipe, nozzle (6), its characterized in that were installed at the top of gas pipe: still include surge tank (17) and air supplement pipe (20), the end of giving vent to anger of gas pipe communicates with the bottom of surge tank (17), the nozzle sets up at the top of surge tank (17) and communicates with surge tank (17), be provided with check valve (19) between the bottom of surge tank (17) and the gas pipe, air supplement pipe (20) also communicates with surge tank (17), be provided with pressure stabilizing valve (21) between air supplement pipe (20) and surge tank (17), and pressure stabilizing valve (21) switch on when pressure in surge tank (17) is less than the pressure in air supplement pipe (20).

2. The oil refining chemical plant circle of claim 1Ultra low NO of shaped flame_xA burner, characterized by: the pressure stabilizing valve (21) comprises a valve body (22), a valve core (23) and a spring (24), wherein a conical cavity (2201) with the diameter gradually increasing along the airflow direction is arranged in the valve body (22), the valve core (23) and the spring (24) are both arranged in the valve body (22), the spring (24) is in a compression state, the spring (24) is connected with the valve core (23), and the valve core (23) is pushed to compress the conical cavity (2201).

3. The oil refinery chemical plant as claimed in claim 1, wherein said circular flame has ultra-low NO_xA burner, characterized by: the middle part of the surge tank (17) is provided with a blocking cover (18), and the blocking cover (18) is in a conical shape with the diameter gradually reduced from bottom to top.

4. The oil refinery chemical plant as claimed in claim 1, wherein said circular flame has ultra-low NO_xA burner, characterized by: the gas pipe include outer gas pipe (3) and interior gas pipe (5), the top setting of outer gas pipe (3) is in combustion chamber (7) outside, the top setting of interior gas pipe (5) is in combustion chamber (7), the top of outer gas pipe (3) and interior gas pipe (5) all is provided with nozzle (6).

5. The oil refinery chemical plant as claimed in claim 1, wherein said circular flame has ultra-low NO_xA burner, characterized by: the bottom of combustor main part be provided with distributing pipe (8), distributing pipe (8) are through metal collapsible tube and gas pipe intercommunication, metal collapsible tube one end and distributing pipe (8) intercommunication, the other end is through butt joint and gas pipe intercommunication.

6. The oil refinery chemical plant as claimed in claim 5, wherein said circular flame has ultralow NO content_xA burner, characterized by: the butt joint comprises a male head (10), a female head (9) and a connecting nut (11), one end of the male head (10) extends into the female head (9) and is hermetically connected with the female head (9), and the connecting nut (11) is rotatably connected with the male head (10)And the connecting nut (11) is in threaded connection with the female head (9).

7. The oil refinery chemical plant as claimed in claim 6, wherein said circular flame has ultralow NO content_xA burner, characterized by: a convex sealing table (1001) is arranged in the middle of the surrounding male head (10), and a sealing gasket (12) is arranged between the end part of the female head (9) and the sealing table (1001).

8. The oil refinery chemical plant as claimed in claim 7, wherein said circular flame has ultralow NO content_xA burner, characterized by: one end, far away from the female head (9), of the connecting nut (11) is provided with an inward flanging, and the sealing platform (1001) and the female head (9) are tightly pressed by the inward flanging of the connecting nut (11).

9. The oil refinery chemical plant as claimed in claim 6, wherein said circular flame has ultralow NO content_xA burner, characterized by: the inner diameter of one end, close to the male head (10), of the female head (9) is larger than that of the other end of the female head, a sealing part (902) with the diameter gradually reduced along the direction far away from the male head (10) is formed in the middle of the female head (9), a flexible pad (14) is arranged at the end part of the male head (10), and the sealing part (902) is pressed by the flexible pad (14).