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CN-121977206-A - Dual-fuel linear burner

CN121977206ACN 121977206 ACN121977206 ACN 121977206ACN-121977206-A

Abstract

The invention provides a dual-fuel linear combustor, which comprises at least 1 dual-fuel gas supply pipe and at least 1 combustion module, wherein the section of the dual-fuel gas supply pipe comprises an H-shaped part positioned at a middle position, an upper semicircular part positioned above the H-shaped part and a lower semicircular part positioned below the H-shaped part. The dual-fuel air supply pipe is designed into an integrated cross-section structure with the H-shaped part matched with the upper semicircular part and the lower semicircular part, the space in the air inlet depth direction of combustion-supporting air is fully utilized, on the premise that dual fuels can be independently and simultaneously supplied, the air passing distance between the dual-fuel air supply pipe and the two sides of the combustion-supporting air duct is guaranteed to be close to the air passing distance of the original single-fuel burner, the problem of insufficient supply of the combustion-supporting air under the high-power working condition is avoided, the combustion stability and the high regulation ratio performance during dual-fuel switching are guaranteed, and meanwhile, the structures such as the combustion-supporting air duct and the flame plate of the original linear burner are not required to be redesigned, the original equipment transformation can be directly adapted, and the user transformation cost is greatly reduced.

Inventors

  • SUN HONGXING
  • Ren Zhuanbo
  • LI YUNLONG

Assignees

  • 安德森热能技术研究(苏州)有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (10)

  1. 1. A dual fuel linear burner comprising: the cross section of the at least 1 dual-fuel gas supply pipe comprises an H-shaped part positioned at the middle position, an upper semicircular part positioned above the H-shaped part and a lower semicircular part positioned below the H-shaped part, wherein a lower opening of the upper semicircular part is butted with an upper opening of the H-shaped part and forms a first fuel supply channel therebetween; at least 1 combustion module, the combustion module comprising: the combustion-supporting air duct is used for allowing combustion-supporting air to pass through, and the dual-fuel air supply pipe is positioned in the combustion-supporting air duct; a flame plate arranged above the dual-fuel gas supply pipe, wherein a combustion-supporting air outlet is formed in the flame plate; A spray head assembly connected to the dual fuel gas supply pipe for directing fuel from the dual fuel gas supply pipe to above the burner plate; And the fire protection plates are arranged on two sides of the flame plate.
  2. 2. The dual fuel linear burner of claim 1, wherein the butt joint of the lower opening of the upper semicircular portion and the upper opening of the H-shaped portion is integrally joined by welding, and the butt joint of the upper opening of the lower semicircular portion and the lower opening of the H-shaped portion is integrally joined by welding.
  3. 3. The dual fuel linear burner of claim 1, wherein at least one side wall of the H-shaped portion is provided with a third through hole at a position above and a position below the intermediate partition, respectively.
  4. 4. The dual-fuel linear burner of claim 1, wherein the burner head assembly comprises a transition connector and a nozzle, the transition connector is connected with a first through hole of a dual-fuel gas supply pipe through threads, the center of the transition connector is penetrated up and down, the nozzle comprises a central pipe and an outer ring body, the outer ring body is connected with the periphery of the end of the central pipe, a plurality of first spray holes which extend radially are arranged above the outer ring body at the top end of the central pipe, a second spray hole is arranged on the outer ring body, the bottom end of the central pipe is connected with a second through hole of the dual-fuel gas supply pipe through threads, the bottom end of the outer ring body is pressed against the upper end face of the transition connector, an annular channel for flowing out first fuel is arranged between the inner wall of the transition connector and the outer wall of the central pipe, the first fuel of the first fuel supply channel is sprayed from the second spray holes to a flame position through the annular channel, and the second fuel of the second fuel supply channel is sprayed from the first spray holes to the flame position through the central pipe.
  5. 5. The dual fuel linear burner of claim 4, wherein the abutment of the bottom end of the outer ring body with the upper end surface of the transition joint is of spherical configuration.
  6. 6. The dual fuel linear burner of claim 1, wherein the burner cap assembly comprises a lower ferrule fitting, a curved tube, a nozzle holder, a clamping ring and a clamping cap, wherein the lower ferrule fitting is threadably connected to the second through hole of the dual fuel gas supply tube, the lower end of the curved tube passes through the lower ferrule fitting and is clamped by the lower ferrule fitting, a circular winding portion is arranged in the middle of the curved tube, the lower end of the nozzle holder is threadably connected to the first through hole of the dual fuel gas supply tube, a ring of stop ring extending radially inwards is arranged in the middle of the inner cavity of the nozzle holder, an inner hole for passing through the upper end of the curved tube is arranged in the middle of the stop ring, a guiding conical surface is arranged at the upper end of the inner hole of the stop ring, a plurality of third spray holes extending radially are arranged on the wall body below the stop ring, a plurality of fourth spray holes extending radially are arranged on the wall body above the stop ring, the clamping cap is threadably connected to the upper part of the nozzle holder, a ring of the clamping cap is downwardly extending top body is arranged on the lower surface of the clamping cap, a ring of the clamping cap is threadably connected to the first through hole, a ring of the fuel gas supply tube is rotatably connected to the inner hole of the clamping ring, a fuel is rotatably arranged on the inner hole of the clamping ring, a fuel is rotatably connected to the clamping ring through the third spray ring, and the fourth spray ring is rotatably connected to the fourth spray hole The fifth nozzle is then ejected from the fourth nozzle to the flame location.
  7. 7. The dual-fuel linear burner of claim 1, wherein the flame plate is a square plate body, the flame plate is provided with a middle hole body, a plurality of strip-shaped inclined grooves which are arranged in a way of being diverged to the periphery by taking the middle hole body as an axis, and a wind passing round hole, the upper end of the nozzle assembly penetrates through the middle hole body and presses the flame plate through a radial extending annular baffle wall, the plurality of strip-shaped inclined grooves are used for enabling combustion-supporting wind to pass through to form rotational flow, and the wind passing round hole is used for increasing the wind passing area.
  8. 8. The dual fuel linear burner of claim 7, wherein the flame plate is further provided with a down bend on both sides thereof, the down bend straddling an upper semi-circular portion of the dual fuel gas supply tube.
  9. 9. The dual fuel linear burner of claim 1, comprising a plurality of lateral combustion units and a plurality of longitudinal combustion units connected between the lateral combustion units, each lateral combustion unit comprising a plurality of combustion modules, each lateral combustion unit sharing a dual fuel gas supply conduit, each longitudinal combustion unit between adjacent lateral combustion units comprising a combustion module, one dual fuel gas supply conduit being provided within each combustion module of a longitudinal combustion unit, the dual fuel gas supply conduit length of each combustion module within a longitudinal combustion unit being no greater than the width of a combustion module, the dual fuel gas supply conduit within each lateral combustion unit being in communication with the dual fuel gas supply conduit of an adjacent longitudinal combustion unit via a first fuel longitudinal communication conduit and a second fuel longitudinal communication conduit.
  10. 10. The dual-fuel linear burner of claim 9, wherein 2 fuel gas guide pipes are respectively arranged at two ends of the dual-fuel gas supply pipe of the transverse combustion unit, a mounting flange is arranged at the end part of each fuel gas guide pipe, 1 fuel gas guide pipe at the same end is a straight pipe, and the other 1 fuel gas guide pipe is a bent pipe.

Description

Dual-fuel linear burner Technical Field The invention relates to the technical field of combustors, in particular to a dual-fuel linear combustor. Background The linear burner is an industrial combustion device with continuous long-strip flame uniformly distributed, and is characterized in that through the design of long and narrow flame paths and densely and uniformly distributed flame holes, fuel gas and air are premixed and then stably combusted, and the linear burner is widely used in the combustion device in the scenes of direct combustion of hot air, drying, smoke heat compensation and the like. For reasons of uneven energy distribution, the need to use dual fuel as an energy input is continually increasing in order to meet the requirements of continuous production. As shown in fig. 1, the structure of the conventional single-fuel linear burner comprises a combustion-supporting air duct 91, a flame plate 92, a fuel air supply pipe 931, a spray head 94 and a fire protection plate 95, wherein the fuel air supply pipe 931 is positioned below the flame plate 92, the spray head 94 is connected to the fuel air supply pipe 931, and after combustion-supporting air enters from the combustion-supporting air duct 91 and passes through the flame plate 92, the combustion-supporting air is mixed with fuel sprayed out of the spray head 94 for combustion, and the air passing spaces between the fuel air supply pipe 931 and the two sides of the combustion-supporting air duct 91 are respectively S1. For a dual fuel linear burner, the fuel gas supply pipe of a single fuel linear burner is generally changed into a double pipe internally and externally coaxially arranged structure, namely, a structure as shown in fig. 2. In the dual-fuel linear burner shown in fig. 2, in order to ensure high turndown ratio performance in the single-fuel use condition, the outer diameter of the outer tube 932 of the fuel air supply tube is obviously increased compared with the outer diameter of the original fuel air supply tube 931, the air passing spaces between the outer tube 932 of the fuel air supply tube and the two sides of the combustion-supporting air duct 91 are respectively S2, and the air passing space S2 is obviously smaller than the air passing space S1 of the original single-fuel linear burner, so that insufficient combustion-supporting air supply in the high-power state is caused. Therefore, the method is not suitable for the transformation on the basis of the original linear burner of the user, the whole linear burner needs to be redesigned, and the transformation cost of the user can be obviously increased. Disclosure of Invention In order to overcome the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a dual fuel linear burner. In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is that the dual-fuel linear combustor comprises: the cross section of the at least 1 dual-fuel gas supply pipe comprises an H-shaped part positioned at the middle position, an upper semicircular part positioned above the H-shaped part and a lower semicircular part positioned below the H-shaped part, wherein a lower opening of the upper semicircular part is butted with an upper opening of the H-shaped part and forms a first fuel supply channel therebetween; at least 1 combustion module, the combustion module comprising: the combustion-supporting air duct is used for allowing combustion-supporting air to pass through, and the dual-fuel air supply pipe is positioned in the combustion-supporting air duct; a flame plate arranged above the dual-fuel gas supply pipe, wherein a combustion-supporting air outlet is formed in the flame plate; A spray head assembly connected to the dual fuel gas supply pipe for directing fuel from the dual fuel gas supply pipe to above the burner plate; And the fire protection plates are arranged on two sides of the flame plate. According to the technical scheme, the dual-fuel air supply pipe is designed into the integrated cross-section structure with the H-shaped part matched with the upper semicircular part and the lower semicircular part, the space in the air inlet depth direction of combustion-supporting air is fully utilized, on the premise that dual fuels can be independently and simultaneously supplied, the air passing distance between the dual-fuel air supply pipe and the two sides of the combustion-supporting air duct is close to the air passing distance S1 of the original single-fuel burner, the problem of insufficient supply of the combustion-supporting air under the high-power working condition is avoided, the structures of the combustion-supporting air duct, the flame plate and the like of the original linear burner are not required to be redesigned, the original equipment can be directly adapted, the user transformation cost is greatly reduced, in addition, the middle interlayer of the H-shaped