WO2016154983A1

WO2016154983A1 - Ejection-type combustion apparatus capable of reducing thermal radiation

Info

Publication number: WO2016154983A1
Application number: PCT/CN2015/075746
Authority: WO
Inventors: 王志强; 李宗洲; 杨瑞
Original assignee: 深圳智慧能源技术有限公司
Priority date: 2015-04-01
Filing date: 2015-04-01
Publication date: 2016-10-06

Abstract

Provided is an ejection-type combustion apparatus capable of reducing thermal radiation, comprising multiple layers of protective guards (10, 12, 14, 16) arranged along the vertical direction; each layer of protective guard (10, 12, 14, 16) is closed in the circumferential direction to form a flame chamber having top and bottom open ends. Of two adjacent layers of protective guards (10, 12, 14, 16) in the vertical direction, the radial width of the upper layer is greater than the radial width of the lower layer, such that an ejection area (18) having the same fluid as the flame chamber is formed between two adjacent protective guards (10, 12, 14, 16). The outer peripheral surface of at least one of the lower protective guards (10, 12, 14, 16) has a plurality of first Venturi burners (20) distributed at intervals along its circumference. The upper part of each of the first Venturi burners (20) extends into the ejection area (18) so that the flames formed by the first Venturi burner (20) are covered by the immediately adjacent upper protective guard (10, 12, 14, 16) in the horizontal direction.

Description

Ejection type combustion device capable of reducing heat radiation

Technical field

The present invention relates to an ejector combustion apparatus, and more particularly to an ejector combustion apparatus capable of reducing heat radiation.

Background technique

In the petrochemical plant, the venting flare system can process the excess, harmful and unbalanced exhaust gas discharged from the production device in time, and can handle the test vehicle, the unqualified gas generated during the parking, and the large amount of gas instantaneously released during the accident to ensure the device. Normal and safe operation. The air defense torch described above is essentially a venturi burner that utilizes a venturi mixer to mix the air shield with air and then combust. If the fuel gas in the venturi mixer is not uniformly mixed with the air, it will result in incomplete combustion of the fuel, which will generate a large amount of harmful emissions such as carbon monoxide, nitrogen oxides and the like. In addition, the flare system emits a large amount of heat during the combustion process, and the heat is mainly transmitted to the outside through radiation, so the heat radiation needs to be suppressed.

technical problem

In view of the above, the present invention proposes an ejector type combustion apparatus capable of reducing heat radiation capable of solving at least one of the above problems.

Technical solution

The present invention provides an ejector type combustion apparatus capable of reducing heat radiation, comprising a plurality of protective hoods arranged in a vertical direction, each of which is closed in a circumferential direction to form a flame chamber having upper and lower open ends, in a vertical In the two adjacent shields in the direction, the radial width of the upper shield is greater than the radial width of the next layer, so that a fluid communication with the flame chamber is formed between the adjacent two shields. a plurality of first venturi burners spaced apart in a circumferential direction by at least one of the lower peripheral shields, the upper portion of each first venturi burner extending into the ejector region to enable said The flame formed by the first venturi burner is at least horizontally obscured by the immediately adjacent upper shield.

In one embodiment, the outer peripheral faces of the continuous plurality of lower shields are respectively provided with a plurality of first venturi burners spaced apart from each other, and the outer peripheral faces of the plurality of upper shields are not provided with any venturi burners.

In one embodiment, in the continuous plurality of lower shields, the fuel intake of the plurality of first venturi burners corresponding to each of the shields is independently controlled in layers.

In an embodiment, in the continuous plurality of lower shields, an outer ring surface of each of the fire shields is provided with an intake ring tube, and the first venturi burner corresponding to the layer of the shield is connected to the common The intake ring pipe is connected to an intake manifold on each of the shields.

In an embodiment, in at least the upper multi-layered shield, the wall of each of the shields comprises a radially spaced outer and inner wall, the outer and inner walls of the shield Both the upper and lower edges are stroked open ends to allow air to circulate between the outer and inner walls.

In one embodiment, the interior of the bottommost shroud is provided with a plurality of sets of venturi burners, each set of venturi burners comprising a plurality of spaced second venturi burners.

In one embodiment, each set of second venturi burners is coupled to a linear intake manifold, and the corresponding linear intake manifold of each set of venturi burners is coupled to an intake manifold.

In an embodiment, the bottommost shield is in the shape of a box and the remaining shields are annular.

In an embodiment, all of the layer shields are in the shape of a box.

Beneficial effect

In summary, the present invention provides an ejector-type combustion apparatus capable of reducing heat radiation, wherein the ejector-type combustion apparatus employs a multi-layered protective cover, and the protective cover is disposed in an adjacent protective cover, the previous one The radial width of the layer shield is greater than the radial width of the next layer such that an adjacent ejection zone is formed between the two shields in fluid communication with the flame chamber, and the upper portion of the venturi burner extends into the ejection region such that the burner The formed flame is covered by the immediately adjacent upper protective cover at least in the horizontal direction, and the protective cover is configured as a double-wall structure, which can effectively prevent heat from being diffused to the outside, thereby reducing the heat radiation.

DRAWINGS

1 is a schematic perspective view of an ejector combustion apparatus.

Figure 2 is a side cross-sectional view of the second and third layer shields.

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the invention

Before the embodiments are described in detail, it is understood that the invention is not limited to the details The invention may be embodied in other ways. Also, it will be understood that the phraseology and terminology used herein are for the purpose of description The words "including", "comprising", "having", and <RTIgt; </ RTI> <RTIgt; </ RTI> used herein are meant to include the items listed thereafter, their equivalents, and other additional items. In particular, when describing "a certain element", the invention does not limit the number of the elements to one, and may include a plurality.

An ejector-type combustion apparatus capable of reducing heat radiation includes a plurality of protective hoods arranged in a vertical direction, each of which is closed in a circumferential direction to form a flame chamber having upper and lower open ends, two adjacent in the vertical direction In the layer shield, the radial width of the upper layer of the shield is greater than the radial width of the next layer, such that an ejection area in fluid communication with the flame chamber is formed between adjacent two layers of the shield, at least one layer a plurality of first venturi burners are circumferentially distributed along the outer peripheral surface of the lower shield, and an upper portion of each first venturi burner extends into the ejector region to cause the first venturi burner The resulting flame is at least horizontally covered by the upper shield next to it.

In the embodiment shown in Figures 1 and 2, the ejector-type combustion apparatus comprises a seven-layer shield arranged in a vertical direction, comprising a first layer of protective cover 10, a second layer of protective cover 12, and a third layer of protective cover. 14. The fourth to seventh protective cover 16. Each of the shields is closed in the circumferential direction to form a flame chamber having upper and lower open ends. In the two layers of the protective cover adjacent in the vertical direction, the radial width of the upper protective cover is greater than the radial width of the lower layer, so that a fluid with the flame cavity is formed between the adjacent two protective covers. Intermittent ejector area. For example, for the second and third layers of shields 12, 14, the radial extent of the third layer of shroud 14 is greater than the radial extent of the second shroud 12, and a fluid communication between the two layers is formed between the two layers. Ejection zone 18.

A plurality of first venturi burners are spaced circumferentially along the outer circumferential surface of at least one of the lower shields. For example, as shown in FIG. 2, the outer peripheral surface of the second layer shroud 12 is axially distributed with a plurality of first venturi burners 20 spaced apart. An upper portion of each first venturi burner 20 extends into the ejector zone 18 such that the flame formed by the first venturi burner 18 is at least horizontally adjacent to the upper hood (ie, the third layer of protection) Cover 14) is covered. In the embodiment shown in FIG. 1, the first venturi burner 18 is provided on the periphery of the second layer 12 and the third layer 14, and the fourth to seven-layer shields 16 are not provided with any burners. It is only used to shield the flame, heat insulation and wind. In other embodiments, a venturi burner may be placed on a more or less continuous continuous layer or layer of hood.

In the above-described continuous plurality of lower shields 12 and 14, the fuel intake of the plurality of first venturi burners corresponding to each of the shields 12 and 14 is independently controlled in units of layers. "Layer" as used herein refers to the layer of the shield. In the embodiment shown in FIG. 1, in the second layer of the shield 12 and the third layer of the shield 14, the outer peripheral surface of each of the shields is provided with an intake ring 22, and the first cover corresponds to a plurality of first The venturi burner 18 is commonly connected to the intake collar 22. The intake ring 22 on each of the shields is connected to an intake manifold 24. By controlling the valve between the intake collar 22 and the intake manifold 24, the distribution of fuel gas from the intake manifold 24 to each intake collar can be adjusted to independently control each of the intake collars 22.

In the embodiment shown in Figure 1, the bottommost shield, i.e., the interior of the first shield 10, is provided with a burner array (not shown) including a plurality of second venturi burners, these second The venturi burner is connected to the linear intake pipe 26, and the linear intake pipe 26 is connected to the intake manifold 24.

In the present embodiment, the fuel gas of the intake manifold 24 is distributed to the combustor array and the small burners 18 mounted on the respective intake collars 22. Compared with the combustion of fuel gas into a large burner for combustion, the small burner of the present invention can ensure more complete combustion and effectively reduce exhaust waste. At the same time, the flame height is lower, effectively reducing light pollution.

In at least a partial layer of the shield, the wall of each of the shields includes a radially spaced outer and inner wall, the outer and inner walls forming openings at the upper and lower edges of the shield The ends are such that air can circulate between the outer and inner walls. In some embodiments, only one or more of the walls of the shield include an outer wall and an inner wall as described above. In other embodiments, the walls of the shield of all layers may also include outer and inner walls as described above. As shown in Fig. 2, the second and third layer shields 12, 14 will be described as an example. In this embodiment, the second layer of the shield 12 and the third layer of the shield 14 are both double walled. For example, the third layer shield 14 includes an outer wall 28 and an inner wall 30, the outer wall 28 and the inner wall 30 being radially spaced apart and formed at the upper and lower edges of the third layer shield 14, respectively. Openings 32, 34. When the flame in the shield 14 rises, air outside the shield 14 will be directed between the outer wall 28 and the inner wall 30 into the interior of the shield. The incoming air enters on the one hand the combustion of the incompletely combusted fuel in the flame and on the other hand the heat dissipation of the wall of the shield. With the double wall structure, the inner wall 30 is the main heated wall, and the air between the outer wall 28 and the inner wall 30 is continuously ejector, so the temperature of the outer wall 28 is effectively reduced, and the temperature is greatly reduced. Thermal radiation from the combustion unit.

The venturi burner 18 mounted on the intake collar 22 is deflected radially inwardly relative to the vertical, i.e., the centerline of the venturi burner 18 forms a skew angle A with the vertical. In the present embodiment, the skew angle A is 3-15 degrees. Since the burner is deflected radially inward, the resulting flame will be radially inward away from the wall of the shield so that the thermal stress of the shield can be reduced.

In the embodiment of Figure 1, the first layer is in the shape of a box and the remaining shields are annular. In another embodiment, all of the layer shields may be in the shape of a box.

The concepts described herein may be embodied in other forms without departing from the spirit and scope. The specific embodiments disclosed are to be considered as illustrative and not restrictive. Therefore, the scope of the invention is to be determined by the appended claims Any changes which come within the meaning and range of the claims are intended to be within the scope of the claims.

Claims

An ejector type combustion apparatus capable of reducing heat radiation, comprising: a plurality of protective hoods arranged in a vertical direction, each of the shields being closed in a circumferential direction to form a flame chamber having upper and lower open ends, in a vertical In the two adjacent shields in the straight direction, the radial width of the upper shield is greater than the radial width of the next layer, so that a fluid communication with the flame chamber is formed between the adjacent two shields. a plurality of first venturi burners spaced apart in the circumferential direction of the outer peripheral surface of the at least one lower shield, the upper portion of each first venturi burner extending into the ejector region to The flame formed by the first venturi burner is at least horizontally obscured by the immediately adjacent upper shield.
The ejector type combustion apparatus capable of reducing heat radiation according to claim 1, wherein a plurality of first venturi burners of said interval are respectively disposed on the outer peripheral surfaces of the plurality of consecutive lower shields, and the plurality of layers are respectively provided There is no venturi burner on the outer circumference of the upper shield.
The ejector-type combustion apparatus capable of reducing heat radiation according to claim 2, wherein in said continuous plurality of lower shields, each of said shields corresponds to a plurality of first venturi burners The intake air is independently controlled in layers.
The ejector type combustion apparatus capable of reducing heat radiation according to claim 3, wherein in the continuous plurality of lower shields, an outer ring surface of each of the shields is provided with an intake ring tube. A plurality of first venturi burners corresponding to the layer of the shield are connected to the intake ring tube, and an intake ring tube on each of the shields is connected to an intake manifold.
The ejector-type combustion apparatus capable of reducing heat radiation according to claim 1, wherein in at least the plurality of upper shields, the wall of each of the shields includes radially outer walls and inner walls The wall, the outer and inner walls each form an open end at the upper and lower edges of the shield to allow air to circulate between the outer and inner walls.
The ejector-type combustion apparatus capable of reducing heat radiation according to claim 1, wherein a plurality of sets of venturi burners are disposed inside the bottommost protective cover, and each set of venturi burners comprises a plurality of spaces. Second venturi burner.
The ejector type combustion apparatus capable of reducing heat radiation according to claim 6, wherein each group of second venturi burners is connected to a linear intake pipe, and each group of venturi burners corresponds to a linear intake pipe and a The intake manifold is connected.
The ejector-type combustion apparatus capable of reducing heat radiation according to claim 6 or 7, wherein said bottommost protective cover is in a square shape, and the remaining protective covers are annular.
The ejector-type combustion apparatus capable of reducing heat radiation according to claim 6 or 7, wherein all of the protective covers are in the shape of a square.