Energy-saving gas device

Abstract

The invention relates to an energy-saving fuel gas device. Comprising gas nozzles and a combustion chamber; the combustion chamber comprises a combustion cover body with an opening in the lower end face and an oxygenation base body with an opening in the upper end face, the upper portion of the oxygenation base body on the lower side extends into the combustion cover body on the upper side, the combustion cover body and the oxygenation base body are combined to form a combustion cavity, a fire penetrating hole is formed in the center of the upper end of the combustion cover body, and a first through hole is formed in the center of the bottom of the oxygenation base body; and the end part of the gas nozzle enters the combustion chamber from the first through hole of the oxygenation seat body. The whole gas supply system of the device is in a vertical shape, escaped gas fuel is changed into mixed gas through multiple times of auxiliary pressure oxygenation and flows to the combustion chamber, and the ignited mixed gas fuel is combusted in the combustion chamber through secondary auxiliary pressure to form local high pressure and high temperature. In order to meet the requirement that the outflow of the unburned waste gas and the burnt waste gas is not blocked.

Description

Technical Field

[0001] This invention relates to the field of gas combustion equipment technology, and in particular to an energy-saving gas device that uses gas as fuel and achieves high-efficiency combustion through multi-stage oxygenation and negative pressure reflux. Background Technology

[0002] The following defects are common in existing commercial / domestic natural gas burners: (1) low primary air coefficient and insufficient oxygen in the combustion zone, resulting in high heat loss due to incomplete chemical combustion and excessive CO emissions; (2) in pursuit of high heat load, the nozzle orifice diameter is simply increased, resulting in poor flame rigidity, uneven temperature field, and limited improvement in thermal efficiency; (3) long secondary air supply path and rapid momentum decay, high carbon hydrocarbons (C3+) and nitrogen oxides cannot continue to react at the tail of the flame, which wastes fuel and increases NOx generation; (4) the burner head is closed or semi-closed, the discharge of high temperature exhaust gas is obstructed, and the radiant heat reflection causes the burner head to overheat and shorten its lifespan.

[0003] Patent application CN201711475424.3 discloses an upper-inlet burner, characterized by comprising a liquid-collecting tray (1), a mixing seat (2), and a flame cap. The liquid-collecting tray (1) is provided with at least two separately arranged nozzle seats (6), each nozzle seat (6) having at least a first nozzle (61) and a second nozzle (62). The mixing seat (2) is located on the upper end face of the aforementioned liquid-collecting tray (1), and the upper end face of the mixing seat (2) has an annular inner mixing groove (22) and an outer mixing groove (21) located outside the inner mixing groove (22). The lower end face of the mixing seat (2) is provided with at least two transversely arranged inner ejector tubes and two transversely arranged outer ejector tubes. One nozzle seat is provided with two nozzles, corresponding to their respective two sets of inner and outer ejector tubes. The space arrangement is compact and reasonable, which is conducive to the extension of the ejector tubes. At the same time, the number of ejector tubes increases, further improving the ejection effect.

[0004] However, the top-inlet burner in the aforementioned patented technology cannot solve the defects in the existing technology, nor does it provide any technical inspiration for solving the existing problems. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving gas device to solve the problems mentioned in the background art above:

[0006] (1) How to improve the structure so that the burner can achieve the advantages of reasonable structure, multi-stage oxygenation, negative pressure reflux and high temperature instantaneous combustion.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An energy-saving gasification device;

[0009] Including the gas nozzle and combustion chamber;

[0010] The combustion chamber includes a combustion hood with an opening at the lower end and an oxygen-enriching seat with an opening at the upper end. The lower oxygen-enriching seat cooperates with the upper combustion hood, and the combustion hood and the oxygen-enriching seat are combined to form a combustion chamber. A flame-through hole is opened at the center of the upper end of the combustion hood, and a first through hole is opened at the center of the bottom of the oxygen-enriching seat. The end of the gas nozzle enters the combustion chamber through the first through hole of the oxygen-enriching seat.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the bottom wall of the oxygenation seat is provided with several air inlets, which are evenly distributed in a circle along the center line of the first through hole.

[0013] Furthermore, the combustion chamber's combustion shroud is provided with a number of combustion holes, which are evenly distributed circumferentially along the center line of the flame-through holes.

[0014] Furthermore, the combustion holes of the combustion shroud extend from the upper sidewall of the combustion shroud to the lower sidewall of the combustion shroud.

[0015] Furthermore, a chamfered surface is provided between the lower side wall and the bottom wall of the oxygenation seat.

[0016] Furthermore, several air supply holes are opened on the chamfered surface of the oxygenation seat, and these air supply holes are evenly distributed in a circle along the center line of the first through hole.

[0017] Furthermore, several negative pressure oxygenation holes are also opened on the side wall of the oxygenation seat, and these holes are evenly distributed in a circle along the center line of the first through hole.

[0018] Furthermore, a reflux protrusion ring extends from the inner wall of the oxygen supply seat located at the edge of the negative pressure oxygen supply hole into the combustion chamber.

[0019] Furthermore, a flange extends outward from the upper end of the side wall of the oxygenation seat.

[0020] Furthermore, the upper surface of the oxygen-enriching seat has a stepped groove that engages with the combustion hood.

[0021] According to the laws of thermodynamics and heat sources: any combustible material (organic compound) must have sufficient oxygen to increase its combustion rate (shorten the ignition delay period); according to the laws of photochemistry, general bond-chain reactions cannot be completed on their own and always rely on thermal initiation, radiation initiation, etc.

[0022] The gas supply system of this energy-saving gas device is vertically oriented. The escaping gaseous fuel undergoes multiple rounds of oxygenation under secondary pressure to become a mixed gas that flows into the combustion chamber. After ignition, the mixed gaseous fuel is burned a second time in the combustion chamber under secondary pressure, forming a local high pressure and high temperature. Because the combustion hood is a semi-open structure (the combustion hood has flame holes, several combustion holes, and negative pressure channels), in order to ensure that the outflow of both incompletely burned and completely burned waste gas is unobstructed, the combustion hood is located at the upper end of the combustion chamber, where its heating area is the largest and its temperature is the highest. Therefore, the gaseous fuel is obstructed per unit area. Affected by the high temperature, some low-carbon molecules enhance the combustion rate (shorten the ignition delay period), while some high-carbon molecules (carbonitrides) are generated, break down, and escape from the combustion hood to burn in the air outside the combustion hood.

[0023] This energy-saving gas device has the following technical advantages:

[0024] (1) Three-stage oxygenation + negative pressure recirculation ensures complete combustion of air and reduces heat loss from exhaust smoke;

[0025] (2) The semi-open hood is combined with the high-speed flame hole, which not only ensures the smooth discharge of exhaust gas, but also uses the momentum of flue gas to entrain secondary air, without the need for an external fan;

[0026] (3) The double-ring slit nozzle is combined with the Venturi low-pressure zone to improve the primary air coefficient and overcome the "central yellow flame" defect of traditional top-inlet burners. Attached Figure Description

[0027] Figure 1 This is one of the perspective views of an embodiment of this energy-saving gas device.

[0028] Figure 2 This is the second perspective view of an embodiment of this energy-saving gasification device.

[0029] Figure 3 This is a sectional view of the main view of an embodiment of this energy-saving gas device.

[0030] Figure 4 This is a perspective view of the oxygenation seat in an embodiment of this energy-saving gasification device.

[0031] Explanation of the labels in the diagram:

[0032] Combustion hood - 110; Flame vent - 111; Combustion port - 112; Oxygen-enriching seat - 120; Air supply port - 121; Air inlet port - 122; Flange - 123; First through hole - 124; Negative pressure oxygen-enriching port - 125; Combustion chamber - 130; Gas nozzle - 200. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Please see Figures 1 to 4 .

[0037] This energy-saving gas device includes a gas nozzle 200 and a combustion chamber.

[0038] The combustion chamber includes a combustion hood 110 and an oxygen supply seat 120. The lower end face of the combustion hood 110 is provided with an opening, and a flame-through hole 111 is provided at the center of the upper end of the combustion hood 110. The side wall of the combustion hood 110 is also provided with a number of combustion holes 112. The number of combustion holes 112 are evenly distributed in a circle along the center line of the flame-through hole 111. The combustion holes 112 extend from the upper side wall of the combustion hood 110 to the lower side wall of the combustion hood 110.

[0039] The combustion hood 110 is made of heat-resistant aluminum-silicon alloy through die casting to establish a high-speed, high-temperature flue gas flow and form a suction negative pressure; the combustion hole 112 allows air jets to enter in a composite state, improving the uniformity of oxygen and fuel mixing;

[0040] The oxygen-enriching seat 120 has an opening on its upper end face, and a flange 123 extends outward from the upper end of the side wall of the oxygen-enriching seat 120. The upper end face of the oxygen-enriching seat 120 has a stepped groove 126 that engages with the combustion hood 110.

[0041] The oxygen-enriching seat 120 has a first through hole 124 at the center of its bottom. The bottom wall of the oxygen-enriching seat 120 is also provided with several air inlets 122. The air inlets 122 are evenly distributed in a circle along the center line of the first through hole 124. The air inlets 122 and the first through hole 124 are concentrically distributed to introduce primary air and form a "Venturi" low-pressure zone in the inner cavity of the seat to achieve premixing of fuel gas and primary air.

[0042] The oxygen-enriching seat 120 also has multiple negative pressure oxygen-enriching holes 125 on its side wall, which are evenly distributed in a circle along the center line of the first through hole 124. The inner wall of the oxygen-enriching seat 120 located at the edge of the negative pressure oxygen-enriching holes 125 extends into the combustion chamber 130 with a return flow protrusion ring 127.

[0043] The lower side wall and bottom wall of the oxygen-enriching seat 120 are provided with a chamfered surface, the chamfered surface is at an angle of 15-25° with the horizontal plane, and a number of air-injection holes 121 are also opened on the chamfered surface of the oxygen-enriching seat 120. The number of air-injection holes 121 are evenly distributed in a circle along the center line of the first through hole 124. The diameter of the air-injection holes 121 is 1.2-1.8 mm, and the center line of the hole is at an angle of 35-50° with the axis of the combustion chamber 130, forming a secondary oxygen-enriching at the root of the flame.

[0044] The upper part of the lower oxygen-enriching seat 120 extends into the upper combustion hood 110. The combustion hood 110 and the oxygen-enriching seat 120 are combined to form a combustion chamber 130. The end of the gas nozzle 200 enters the combustion chamber 130 through the first through hole 124 of the oxygen-enriching seat 120. The nozzle end face is 8-12 mm above the top of the combustion chamber 130, forming a 5-7 mm "secondary negative pressure reflux zone", which allows unburned CH free radicals to participate in the reaction again.

[0045] This energy-saving gas supply device, through a vertical gas supply structure, allows the gas to undergo the following stages after initial air premixing: ① Tangential flow through inlet 122 – primary oxygenation; ② Oblique jet through chamfered surface replenishment inlet 121 – secondary oxygenation; ③ Jet through negative pressure oxygenation inlet 125 – tertiary oxygenation. Simultaneously, high-speed flue gas is drawn in through flame vent 111, creating negative pressure in the upper part of the combustion chamber 130, forcing external air to return in the opposite direction. This air then undergoes a "pyrolysis-re-ignition" reaction with the high-temperature hydrocarbons and nitrogen oxides at the tail of the flame, achieving "instant combustion + tail combustion" coupling, shortening the ignition delay period, and increasing the peak flame temperature.

[0046] This energy-saving gas device features a unique combustion method that results in high temperature, high efficiency, simple structure, low manufacturing cost, and is more energy-efficient and environmentally friendly.

[0047] This energy-saving gas device consists of a combustion hood 110 and an oxygen-enriching seat 120 connected from top to bottom to form a semi-open combustion chamber 130; the gas nozzle 200 extends from bottom to top into the axial position of the combustion chamber 130 through the first through hole 124 at the bottom of the oxygen-enriching seat 120; the side wall of the combustion hood 110 is provided with a combustion hole 112, and the chamfered surface of the oxygen-enriching seat 120 is provided with a gas supply hole 121, which together form a coupled gas channel of "three-stage oxygenation and two-stage negative pressure reflux".

[0048] This energy-saving gas appliance exhibits superior advantages over similar products in the following aspects:

[0049] The entire gas combustion process is vertical, utilizing negative pressure for oxygenation multiple times. Under high temperature, low pressure, and thermal radiation conditions, the gas completes the ignition delay period and full oxidation process, resulting in high thermal efficiency and high thermal utilization rate (thermal efficiency increased by over 95%). It boasts advantages such as simple structure (more than 40% reduction in parts, weight reduced by at least 3 times, and process size reduced by more than 2 times) and low cost. It features high heating frequency, large thermal expansion of the gaseous fuel, fast flow rate, high combustion coefficient, and produces no toxic or harmful residues. Unlike similar products, it consistently maintains a minimal flame and minimal leakage, making it more energy-efficient and environmentally friendly.

[0050] The above description is only one embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the principle of the present invention, and these should also be considered to fall within the protection scope of the present invention.

Claims

1. An energy-saving gas-fired device, characterized in that: Includes a gas nozzle (200) and a combustion chamber; The combustion chamber includes a combustion hood (110) with an opening at the lower end and an oxygen-enriching seat (120) with an opening at the upper end. The lower oxygen-enriching seat (120) cooperates with the upper combustion hood (110), and the combustion hood (110) and the oxygen-enriching seat (120) are combined to form a combustion chamber (130). A flame-through hole (111) is opened at the center of the upper end of the combustion hood (110), and a first through hole (124) is opened at the center of the bottom of the oxygen-enriching seat (120). The end of the gas nozzle (200) enters the combustion chamber (130) through the first through hole (124) of the oxygen-enriching seat (120).

2. The energy-saving gas device according to claim 1, characterized in that: The bottom wall of the oxygenation seat (120) is also provided with a number of air inlets (122), which are evenly distributed in a circle along the center line of the first through hole (124).

3. The energy-saving gas device according to claim 1, characterized in that: The combustion chamber's combustion hood (110) is provided with a number of combustion holes (112), which are evenly distributed in a circular pattern along the center line of the flame-through hole (111).

4. The energy-saving gas device according to claim 3, characterized in that: The combustion holes (112) of the combustion hood (110) extend from the upper sidewall of the combustion hood (110) to the lower sidewall of the combustion hood (110).

5. The energy-saving gas device according to claim 1, characterized in that: The lower side wall and bottom wall of the oxygenation seat (120) are provided with a chamfered surface.

6. The energy-saving gas device according to claim 5, characterized in that: The oxygenation seat (120) has several air supply holes (121) on its chamfered surface. The air supply holes (121) are evenly distributed in a circle along the center line of the first through hole (124).

7. The energy-saving gas device according to claim 1, characterized in that: The oxygenation seat (120) also has several negative pressure oxygenation holes (125) on its side wall, and the several negative pressure oxygenation holes (125) are evenly distributed in a circle along the center line of the first through hole (124).

8. The energy-saving gas device according to claim 7, characterized in that: A return flow ring (127) extends from the inner wall of the oxygenation seat (120) located at the edge of the negative pressure oxygenation hole (125) into the combustion chamber (130).

9. The energy-saving gas device according to claim 1, characterized in that: A flange (123) extends outward from the upper end of the side wall of the oxygenation seat (120).

10. The energy-saving gas device according to claim 1, characterized in that: The upper end face of the oxygen-enriching seat (120) has a stepped groove (126) that engages with the combustion hood (110).

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