CN111336519A - Regenerative natural gas straight flame burner - Google Patents

Abstract

The utility model provides a heat accumulation formula natural gas direct flame nozzle, includes the nozzle body, is equipped with a set of or multiunit gas passage in the nozzle body, and every group gas passage includes gas passage and the combustion-supporting wind passageway that intersects with gas passage. The heat accumulating type natural gas direct flame burner also comprises heat accumulators and natural gas spray guns, wherein the number of the heat accumulators is the same as that of the gas channels. Each heat accumulator is arranged in the combustion-supporting air channel corresponding to the gas channel. Each natural gas spray gun comprises a gun seat and a gun body; the gun seat comprises an annular gun seat body and a gun seat flange connected with one end of the gun seat body, the gun seat body extends into one end of the gas channel, and the gun seat flange is detachably connected with the burner body; the gun body comprises a gun barrel and a gun barrel flange; the barrel flange is connected to the barrel of the barrel and removably connected to the butt flange. And the side surface of the gas channel of each group of gas channels is provided with an ignition gun mounting hole which penetrates through the side wall of the burner body. The natural gas spray gun is easy to maintain and replace and durable in use.

Description

Regenerative natural gas straight flame burner

technical field

The invention relates to gas burner technology for industrial furnaces.

Background technique

Steel rolling furnaces, bakers, etc. need to use natural gas straight flame burners. In the existing natural gas straight flame burners, the natural gas spray gun and the ignition gun are often set on the same gun seat. Once the gun seat is damaged, the natural gas spray gun, the ignition gun and the gun seat must be disassembled and replaced at the same time. inconvenience. In addition, the existing natural gas straight flame burners still have the shortcomings of low combustion efficiency and poor energy-saving effect.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a regenerative natural gas straight flame burner, the natural gas spray gun of the regenerative natural gas straight flame burner is easy to maintain and replace, and is durable.

The further technical problem to be solved by the present invention is to provide a natural gas straight flame burner with stable and reliable combustion, high combustion efficiency and good energy saving effect.

The technical scheme adopted in the present invention is as follows: a regenerative natural gas straight flame burner includes a burner body, and one or more groups of gas channels are arranged in the burner body, and each group of gas channels includes a gas channel and a combustion-supporting air channel intersecting with the gas channel It is characterized in that the regenerative natural gas straight flame burner also includes the same number of regenerators and natural gas spray guns as the gas channels; each heat storage body is arranged in the combustion-supporting air channel corresponding to the gas channel; each natural gas spray gun includes a gun seat and the gun body; the gun seat includes an annular gun seat body and a gun seat flange connected with one end of the gun seat body, the gun seat body extends into one end of the gas channel, and the gun seat flange is detachably connected to the burner body; The seat body includes a gun seat shell and a gun seat fire-resistant insulation layer, and the gun seat fire-resistant insulation layer is poured on the inner wall of the gun seat shell; the gun body includes a gun barrel and a gun barrel flange; the gun barrel flange is connected with the barrel of the gun barrel. , and is detachably connected with the gun seat flange; the gun barrel is divided into a front section and a rear section with the barrel flange as the boundary, the outer peripheral surface of the front section is poured with a barrel refractory insulation layer, and the front section passes through the gun seat body. The central through hole extends into the gas channel; the side of the gas channel of each group of gas channels is provided with an ignition gun installation hole penetrating the side wall of the burner body.

The above-mentioned regenerative natural gas straight flame burner, wherein each gas channel includes a guide section, a mixing section and a flaming port in sequence from one end of the gas channel to the other end of the gas channel; the combustion-supporting air channel intersects the guide section, and the natural gas spray gun The front section of the barrel extends into the guide section; the end of the guide section close to the mixing section is provided with a tapered portion, and the diameter of the tapered portion gradually decreases from one end of the gas channel to the other end of the gas channel; the mixing section is cylindrical; The burner is tapered, and the diameter of the burner gradually increases from one end of the gas passage to the other end of the gas passage.

In the above-mentioned regenerative natural gas straight flame burner, the length of the flaming port is 3 to 3.4 times the length of the mixing section, and the length of the tapered section is 1.1 to 1.2 times the length of the mixing section.

In the above-mentioned regenerative natural gas straight flame burner, the material of the gun barrel is heat-resistant stainless steel.

Because the present invention adopts the above technical scheme, the technical effect it produces is obvious:

1. The natural gas straight flame burner of the embodiment of the present invention sets the ignition gun mounting hole on the side wall of the burner body, so that the natural gas spray gun and the ignition gun are installed independently of each other, and the natural gas spray gun is detachably connected by a gun seat and a gun body. The gun seat and the burner body are also detachably connected, so it is very convenient to replace the gun seat or the gun body; at the same time, the inner wall of the gun seat body and the outer wall of the gun barrel are poured with a refractory insulation layer, and the gun barrel is made of Made of heat-resistant stainless steel, it can ensure that the gun seat and gun body can withstand high temperature without being damaged, and have a long service life;

2. In the embodiment of the present invention, the guiding section of the gas channel is provided with a tapered portion at one end close to the mixing section. The diameter of the tapered portion gradually decreases from one end of the gas channel to the other end of the gas channel. It is tapered, and the diameter of the burner gradually increases from one end of the gas channel to the other end of the gas channel. The length of the burner is 3 to 3.4 times the length of the mixing section, and the length of the cone is the length of the mixing section. 1.1 to 1.2 times larger than that, the conical part of the constriction can speed up the speed of the gas ejected from the barrel and the air flowing in from the combustion air passage to the mixing section, and the two are fully mixed in the cylindrical mixing section, thus The flame ejected from the crater can be fully burned, the combustion efficiency is improved, and a good energy saving effect is achieved.

Description of drawings

1 to 3 respectively show a schematic front view, a schematic plan view and a schematic side view of the natural gas straight flame burner according to the first embodiment of the present invention.

FIG. 4 shows the A-A sectional view of FIG. 1 .

FIG. 5 shows a B-B cross-sectional view of FIG. 2 .

6 to 8 respectively show a schematic front view, a schematic plan view and a schematic side view of the natural gas straight flame burner according to the second embodiment of the present invention.

FIG. 9 shows the A-A sectional view of FIG. 6 .

FIG. 10 shows a B-B cross-sectional view of FIG. 7 .

Detailed ways

The features and performances of the present invention are further described below in conjunction with the accompanying drawings and embodiments.

See Figures 1 to 5. The regenerative natural gas straight flame burner according to the first embodiment of the present invention includes a burner body 1 , a regenerative body 2 , a natural gas spray gun 3 and a hood 4 .

The burner body 1 is composed of a shell 1a and a burner body refractory and thermal insulation layer 1b cast on the inner wall of the shell. The burner body 1 is provided with a group of gas passages 10 , and the gas passages include a gas passage 11 and a combustion-supporting air passage 12 intersecting with the gas passage 11 . In this embodiment, the burner body 1 is L-shaped, and the L-shaped burner body includes a horizontal portion 15 and a vertical portion 16 , and the combustion-supporting air passage 12 intersects the gas passage 11 vertically.

The heat accumulator 2 is arranged in the combustion air passage 12 . In this embodiment, the side wall of the combustion-supporting air passage 12 is provided with a support step 121 , and the heat storage body 2 is placed on the support step 121 . The regenerator 2 is composed of a plurality of zirconium corundum mullite with holes, and the holes are honeycomb-shaped.

The natural gas spray gun 3 includes a gun base 3a and a gun body 3b. The gun seat 3a includes an annular gun seat body 31 and a gun seat flange 32 connected with one end of the gun seat body 31. The gun seat body 31 extends into one end of the gas channel 11, and the gun seat flange 32 is detachable from the burner body 1. ground connection. The gun seat body 31 includes a gun seat housing 311 and a gun seat refractory thermal insulation layer 312 .

The gun body 3b includes a barrel 33 and a barrel flange 34 . The barrel flange 34 is connected with the body of the gun barrel 33 and is detachably connected with the gun seat flange 32 . The barrel 33 is divided into a front section 331 and a rear section 333 with the barrel flange 34 as the boundary. The outer peripheral surface of the front section 331 is poured with a barrel refractory insulation layer 332, and the front section 331 passes through the central through hole of the gun seat body 31 and extends into the barrel 33. in the gas channel 11.

In this embodiment, the burner body 1 is welded with a plurality of first bolts 51 , and each first bolt 51 passes through the gun seat flange 32 and is fastened by the first nuts 53 , so that the gun seat flange 32 is connected to the burner flange 32 . The nozzle body 1 is detachably connected; the gun seat body 31 is welded with a plurality of second bolts 52, and each second bolt 52 passes through the gun seat flange 32 and the gun barrel flange 34 in turn, and is fastened by the second nuts 54, So that the barrel flange 34 and the gun seat flange 32 are detachably connected together.

The air hood 4 is provided at the air inlet of the combustion-supporting air passage 12 , and is detachably connected to the burner body 1 through a plurality of third bolts 55 . The hood 4 is used to communicate with an external air duct.

The side of the gas channel 11 is provided with an ignition gun installation hole 13 which penetrates the side wall of the burner body. The ignition gun installation hole 13 is an inclined hole for installing the ignition gun. The outlet of the ignition gun installation hole 13 is close to the barrel gun in the gas channel. mouth.

Further, the gas channel 11 sequentially includes a guide section 111 , a mixing section 112 and a flame injection port 113 from one end of the gas channel to the other end of the gas channel.

The combustion-supporting air passage 12 intersects with the guide section 111 , and the front section 331 of the barrel 33 of the natural gas spray gun protrudes into the guide section 111 . One end of the guide section 111 close to the mixing section 112 is provided with a tapered portion 114, and the diameter of the tapered portion 114 gradually decreases from one end of the gas passage to the other end of the gas passage. The mixing section 112 has a cylindrical shape. The burner 113 is tapered, and the diameter of the burner 113 gradually increases from one end of the gas passage to the other end of the gas passage.

Further, the length of the crater is 3 to 3.4 times the length of the mixing section 112 , and the length of the tapered portion 114 is 1.1 to 1.2 times the length of the mixing section 112 .

The conical part of the constriction can speed up the speed of the gas ejected from the barrel and the air flowing in from the combustion-supporting air channel to the mixing section. The flame is fully burned, the combustion efficiency is improved, and a good energy saving effect is achieved.

Optionally, the material of the refractory thermal insulation layer 1b of the burner body is cement, and the materials of the refractory thermal insulation layer 312 of the gun seat and the refractory thermal insulation layer 332 of the gun barrel are both zirconium corundum.

The working process of the regenerative natural gas straight flame burner according to the first embodiment of the present invention consists of a combustion stage and an exhaust stage which are continuously circulated. In the combustion stage, the blower blows cold air from the air hood 4 into the combustion-supporting air passage 12, at the same time, the barrel 33 of the natural gas spray gun 1 introduces the natural gas with a pressure of 7-10KPa into the gas passage 11, and ignites the ignition gun, achieve combustion. After a predetermined time (for example, 50s), the blower stops working, and at the same time, the natural gas supply is stopped, and the exhaust stage is entered. In the exhaust stage, the external induced draft fan draws air out through the hood 4 . In the process of discharging the high-temperature flue gas, the heat storage body 2 absorbs and stores the waste heat in the high-temperature flue gas. In the next combustion stage, the cold air blown into the combustion air passage 12 can absorb the heat stored in the regenerator when passing through the regenerator 2 to achieve preheating, which can reduce gas consumption and achieve the effect of energy saving.

6 to 10 respectively show the natural gas straight flame burner according to the second embodiment of the present invention. The main difference between the second embodiment and the first embodiment is that in the second embodiment, the burner body 1 There are two sets of gas passages 10, and the two sets of gas passages 10 are parallel to each other. The regenerative natural gas straight flame burner includes two regenerators 2 , two natural gas spray guns 3 and two air hoods 4 with the same number as the gas passages 10 . Each regenerator 2 is arranged in the combustion air passage 12 corresponding to the gas passage. Each natural gas spray gun 3 is disposed at one end of the gas channel 11 corresponding to the gas channel. The side surfaces of the gas channels 11 of each group of gas channels are provided with ignition gun mounting holes 13 penetrating the side walls of the burner body. Each air hood 4 is arranged at the air inlet of the combustion-supporting air passage 12 corresponding to the gas passage, and is detachably connected with the burner body 1 . In the second embodiment, the structure of each gas passage 10 , the structure of each heat accumulator 2 , the structure of each natural gas spray gun 3 and each wind hood 4 are the same as those of the first embodiment.

Further, the burner body 1 is provided with a blocking portion 18, and the blocking portion 18 is arranged between the other ends of the gas passages of the two groups of gas passages (ie, the fire ports) to prevent the fire flames of the two groups of gas passages from interfering with each other. The material of the blocking part is refractory insulation material.

The working process of the regenerative natural gas straight flame burner according to the second embodiment of the present invention consists of a first working stage and a second working stage that are continuously circulated. In the first working stage, the blower blows cold air into the combustion-supporting air channel 12 of one of the air channels, and the barrel 33 of the natural gas spray gun 3 introduces the natural gas with a pressure of 7-10KPa into the gas channel 11 of the air channel, and points Fire the gun to achieve combustion. At the same time, the induced draft fan draws air from the combustion-supporting air channel 12 of the other air channel, and the exhaust gas temperature is about 150°C-200°C. During the process of discharging the high-temperature flue gas, the heat accumulator 2 in the combustion-supporting air channel 12 of the other air channel absorbs and stores the waste heat in the high-temperature flue gas. After a predetermined time (for example, 50s), the first working stage ends, and the second working stage is entered. In the second working stage, the combustion-supporting air channel 12 of the other air channel takes in air, and the combustion-supporting air channel 12 of the above-mentioned one of the air channels exhausts. Because the cold air blown into the combustion-supporting air channel 12 of the other air channel can absorb the heat stored by the regenerator when passing through the regenerator 2, and realize preheating (the temperature of the hot air after preheating can reach 800°C-1000°C), This can reduce gas consumption and achieve the effect of energy saving.

In the natural gas straight flame burner of the embodiment of the present invention, the installation hole of the ignition gun is arranged on the side wall of the burner body, so that the natural gas spray gun and the ignition gun can be installed independently of each other. Moreover, the gun seat and the burner body are also detachably connected, so it is very convenient to replace the gun seat or the gun body; at the same time, the inner wall of the gun seat body and the outer wall of the gun barrel are poured with a fire-resistant insulation layer, and the gun barrel is made of heat-resistant insulation. Made of stainless steel, it can ensure that the gun seat and gun body are not easy to be damaged by high temperature.

Claims (10)

1. A regenerative natural gas straight flame burner, comprising a burner body, wherein one or more groups of gas channels are provided in the burner body, and each group of gas channels includes a gas channel and a combustion-supporting air channel intersecting with the gas channel ; It is characterized in that, the regenerative natural gas straight flame burner also includes a regenerative body and a natural gas spray gun with the same number of the gas passages; Each of the regenerators is arranged in the combustion air passage corresponding to the gas passage; Each of the natural gas spray guns includes a gun seat and a gun body; the gun seat includes an annular gun seat body and a gun seat flange connected with one end of the gun seat body, and the gun seat body extends into the gas channel. At one end, the gun seat flange is detachably connected to the burner body; the gun seat body includes a gun seat shell and a gun seat refractory insulation layer, and the gun seat refractory insulation layer is cast on the gun seat shell the inner wall of the gun body; the gun body includes a gun barrel and a gun barrel flange; the gun barrel flange is connected with the body of the gun barrel, and is detachably connected with the gun seat flange; the The barrel is divided into a front section and a rear section with the barrel flange as a boundary, the outer peripheral surface of the front section is cast with a barrel refractory insulation layer, and the front section passes through the central through hole of the gun seat body and extends into the barrel. in the gas channel; The side of the gas channel of each group of gas channels is provided with a mounting hole for the ignition gun which penetrates the side wall of the burner body. 2. The regenerative natural gas straight flame burner according to claim 1, wherein the mounting hole of the ignition gun is an inclined hole. 3. The regenerative natural gas straight flame burner according to claim 1, wherein each of the gas passages sequentially comprises a guide section, a mixing section and a flaming port from one end of the gas passage to the other end of the gas passage ; The combustion-supporting air passage intersects the guide section, and the front section of the barrel of the natural gas spray gun extends into the guide section; the guide section is provided with a tapered portion at one end close to the mixing section, and the diameter of the tapered portion is It gradually narrows from one end of the gas channel to the other end of the gas channel; The mixing section is cylindrical; the burner is conical, and the diameter of the burner gradually increases from one end of the gas passage to the other end of the gas passage. 4 . The regenerative natural gas straight flame burner according to claim 3 , wherein the length of the flame injection port is 3 times to 3.4 times the length of the mixing section, and the length of the tapered portion is 4 . 1.1 to 1.2 times the length of the mixing section. 5. The regenerative natural gas straight flame burner according to claim 1, wherein the burner body is L-shaped, and the L-shaped burner body comprises a horizontal portion and a vertical portion; The combustion-supporting air passage vertically intersects with the gas passage. 6. The regenerative natural gas straight flame burner according to claim 1, wherein the material of the barrel is heat-resistant stainless steel. 7. The regenerative natural gas straight flame burner according to claim 1, wherein the burner body is welded with a plurality of first bolts, and each of the first bolts passes through the gun seat flange, and fastened by the first nut; The gun seat body is welded with a plurality of second bolts, and each second bolt passes through the gun seat flange and the gun barrel flange in sequence, and is fastened by a second nut. 8. The regenerative natural gas straight flame burner according to claim 1, wherein the regenerative natural gas straight flame burner further comprises an air hood with the same number as the gas passages; The cover is arranged on the air inlet of the combustion-supporting air channel corresponding to the gas channel, and is detachably connected with the burner body. 9. The regenerative natural gas straight flame burner according to any one of claims 1 to 8, wherein the number of the gas passages is two groups, and the two groups of gas passages are parallel to each other. 10. The regenerative natural gas straight flame burner according to claim 9, wherein the burner body is provided with a blocking portion, and the blocking portion is arranged between the other ends of the gas passages of the two groups of gas passages. In the meantime, the material of the blocking part is refractory insulation material.

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