阅读说明：本技术 一种模块化燃气燃烧器及其操作方法 (Modular gas burner and operation method thereof ) 是由 何金桥 李羽 张磊 刘亮 李新颖 卿梦霞 陈烨 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种模块化燃气燃烧器及其操作方法,该装置包括空气管、定位管、燃料管组成的气流喷嘴。风箱筒体、风箱进气管及连接系统、定位圆钢及多孔介质体组件。助燃用空气经通过连接风箱进气管与外界空气引入管与输出法兰连接送入到风箱简体经风箱端板后,进入到定位管并空气管与来自燃料管中燃气进行一步混合并燃烧。风箱筒体与燃烧室由风箱外法兰连接,燃烧室由混合室与预燃烧室通过定位销与销钉连接。本发明还提供了一种模块化燃气燃烧器的操作方法。本发明解决了现有技术中燃烧器无法充入足量的助燃剂,不能保证低热值燃气正常、持续燃烧的问题。(The invention discloses a modularized gas burner and an operation method thereof. The air box comprises an air box cylinder, an air box air inlet pipe, a connecting system, positioning round steel and a porous medium body assembly. The combustion-supporting air is connected with an external air inlet pipe and an output flange through a connecting air box air inlet pipe, is sent into the air box cylinder, passes through an air box end plate, enters into the positioning pipe, is mixed with the fuel gas from the fuel pipe in one step and burns. The wind box cylinder body is connected with the combustion chamber through a wind box outer flange, and the combustion chamber is connected with the pre-combustion chamber through a mixing chamber and a pin through a positioning pin. The invention also provides an operation method of the modular gas burner. The invention solves the problems that the combustor in the prior art can not be filled with enough combustion improver and can not ensure the normal and continuous combustion of the low-calorific-value gas.)

1. A modular gas burner characterized by: comprises an air flow nozzle consisting of an air pipe (1), a positioning pipe (2) and a fuel pipe (3); the air box comprises an air box cylinder (6), an air box air inlet pipe (7) and a connecting system thereof, positioning round steel (12), a porous medium body component (19) and an ignition sleeve (23); the combustion-supporting air is connected with an external air inlet pipe or an air blower output flange through a connecting air box air inlet pipe (7) and is sent into an air box cylinder body (6), and after passing through an air box end plate (5), the combustion-supporting air enters a positioning pipe (2), reaches an air pipe (1) through the positioning pipe (2), is mixed with fuel gas from a fuel pipe (3) in one step and burns; the positioning round steel (12) in the combustion chamber is of a threaded structure, the length is adjusted, and the required porous medium (19) is conveniently added; the gas flow nozzle and the gas burner are mutually connected with a wind box flange (4) of the welding gas flow nozzle through a wind box connecting flange (13) welded on an outer cylinder body of the burner, the whole structure is combined or separated according to requirements, and the two flanges are sealed through asbestos gaskets with fireproof and heat-preservation effects; the gas burner is connected with the flue gas inlet flange through a cold water jacket connecting flange (15) welded on the outer cylinder body of the burner, and the two flanges are sealed through asbestos gaskets with the functions of fire resistance and heat preservation; the combustion chamber is connected with the pre-combustion chamber through a dowel pin (20) and a dowel pin (21) by a mixing chamber and a pre-combustion chamber and is sealed by an asbestos gasket with the functions of fire resistance and heat preservation, and the length of the combustion chamber extending into the combustor can be adjusted according to needs.

2. The modular gas burner of claim 1, wherein: the air flow nozzle is supported by the fuel pipe (3) and the air pipe (1), and the positioning pipe (2) is fixed in the whole air flow nozzle by welding or a positioning pin in an interlayer of the fuel pipe (3) and the air pipe (1); the outer cylinder body of the positioning pipe (2) is connected and assembled with the air box cylinder body (6) and the air box air inlet pipe (7) into a whole.

3. The modular gas burner of claim 1, wherein: the pre-combustion chamber is a component for mixing and combusting intensified fuel gas obtained by welding and packaging a combustor outer cylinder body and positioning round steel (12) through a steel structural member; the porous medium body assembly (19) is fixed through positioning round steel (12) embedded in the corresponding position of the outer cylinder of the combustor, and the positioning round steel (12) is connected with the outer wall of the combustor in a threaded mode; the positioning round steel (12) is moved and fixed according to the volume of the porous medium body component (19).

4. The modular gas burner of claim 1, wherein: the combustor is by air flow nozzle and combustion chamber through welding bellows flange (13) and the bellows flange (4) interconnect of welding air flow nozzle on the outer barrel of combustor, and is sealed through having fire-resistant heat preservation effect asbestos washer between two flanges, and the combustor is through welding cold water cover flange (15) and flue gas inlet flange interconnect on the outer barrel of combustor, and is sealed through having fire-resistant heat preservation effect asbestos washer between two flanges.

5. The modular gas burner of claim 1, wherein: the pre-combustion chamber of the combustion chamber is connected and assembled into a whole by a pin (21) through a through hole on an inner cylinder body of the pre-combustion chamber and a positioning pin (20) of the mixing chamber, or is connected by welding and sealed by an asbestos gasket (22) with the function of fire resistance and heat preservation.

Technical Field

The present invention relates to a gas burner and an operation method thereof, and more particularly, to a burner for high-efficiency combustion of low-grade gas and an operation method thereof.

Background

With the development of industry, energy consumption is sharply increased, and energy waste is serious. The combustor is used as an energy consumption product, the market holding amount is huge, and the energy utilization rate of the combustor becomes an important concern of people. The burner mainly burns fuel and air, and for the burner without an injection structure, the air and the fuel gas are mixed in advance, the fuel and the air are sent into a combustion area, and the structure and the arrangement mode of a burner nozzle determine the mixing and the combustion degree of the air and the fuel gas. How to perform sufficient and effective mixing directly affects fuel energy utilization, thermal efficiency of the combustor, and pollutant emissions. Therefore, the design of the burner which can efficiently mix the fuel gas and the combustion-supporting gas and can fully burn has very important practical significance and application value.

Disclosure of Invention

The invention aims to provide a modular gas burner and an operation method thereof, wherein the burner is provided with a premixing chamber capable of enhancing the mixing of combustion gas flow in a burner shell and a porous medium body for enhancing ignition combustion, and a premixing pre-combustion section and a nozzle are in a split module structure. The combustor can not only use the gas for combustion of the heat insulation hearth, but also use the gas for combustion in the boiler hearth with heat exchange effect, thereby increasing the application range of the gas. The technical scheme of the invention ensures that the gas burner can meet the requirements of stable ignition, combustion and burnout of gas under different load operation conditions of the gas boiler.

The technical scheme is as follows:

a modularized gas burner comprises an air flow nozzle consisting of an air pipe 1, a positioning pipe 2 and a fuel pipe 3. An air box cylinder 6, an air box air inlet pipe 7 and a connecting system thereof, positioning round steel 12, a porous medium body component 19 and an ignition sleeve 23. The combustion-supporting air is connected with an external air inlet pipe or an air blower output flange through a connecting air box air inlet pipe 7 and is sent into an air box cylinder 6, and after passing through an air box end plate 5, the combustion-supporting air enters a positioning pipe 2, reaches an air pipe 1 through the positioning pipe 2 and is mixed and combusted in one step with fuel gas from a fuel pipe 3. The positioning round steel 12 in the combustion chamber is of a threaded structure, the length can be adjusted, and the required porous medium 19 is conveniently additionally arranged. The air flow nozzle and the gas burner are connected with each other through an air box connecting flange 13 welded on an outer cylinder body of the burner and an air box flange 4 welded with the air flow nozzle, the whole structure can be combined or separated according to requirements, and the two flanges are sealed through an asbestos gasket with the fireproof heat preservation effect. The gas burner is connected with the flue gas inlet flange through a cold water jacket connecting flange 15 welded on the outer cylinder body of the burner, and the two flanges are sealed through asbestos gaskets with the functions of fire resistance and heat preservation. The combustion chamber is connected with the pre-combustion chamber through a dowel pin 20 and a dowel 21 by a mixing chamber and a pre-combustion chamber and is sealed by an asbestos gasket with the functions of fire resistance and heat preservation, and the length of the combustion chamber extending into the combustor can be adjusted according to needs.

Further, the air flow nozzle is supported by the fuel pipe 3 and the air pipe 1, and the positioning pipe 2 is fixed in the whole air flow nozzle by welding or positioning pins in the interlayer of the fuel pipe 3 and the air pipe 1. The outer cylinder body of the positioning pipe 2 is connected and assembled with the air box air inlet pipe 7 of the air box cylinder body 6 into a whole.

Further, the pre-combustion chamber is a component for mixing and combusting reinforced fuel gas obtained by welding and packaging the outer cylinder of the combustor and the positioning round steel 12 through a steel structural member. The porous medium body assembly 19 is fixed through positioning round steel 12 embedded in the corresponding position of the outer cylinder of the combustor, and the positioning round steel 12 is connected with the outer wall of the combustor in a threaded mode. The positioning round bar 12 may be moved and fixed according to the volume of the porous medium body member 19.

Furthermore, the combustor is formed by mutually connecting an air flow nozzle and a combustion chamber with an air box flange 4 of the welded air flow nozzle through an air box connecting flange 13 welded on an outer cylinder body of the combustor, and the two flanges are sealed through asbestos gaskets with the functions of fire resistance and heat preservation. The combustor is connected with the flue gas inlet flange through a cold water jacket connecting flange 15 welded on the outer cylinder of the combustor, and the two flanges are sealed through asbestos gaskets with the functions of fire resistance and heat preservation.

Furthermore, the pre-combustion chamber of the combustion chamber is connected and assembled into a whole by a pin 21 through a through hole on the inner cylinder body and a positioning pin 20 of the mixing chamber, or can be connected by welding and sealed by an asbestos gasket 22 with the function of fire resistance and heat preservation. The separable structure is formed, and the length of the combustion chamber can be split, combined or adjusted according to requirements.

The invention has the beneficial effects that:

the combustor of the invention can place the porous medium heat accumulator at the position of the positioning round steel in the combustion cavity in consideration of the condition required by sufficient combustion. The air inlet pipe and the fuel pipe of the air box are utilized to strengthen the mixing of fuel gas and oxygen, the effect of the air inlet pipe of the air box is utilized to further optimize the uniform and full-section inflow of the mixed gas of the fuel gas and the air to the porous medium heat accumulator, and the ignition and the combustion of the mixed gas of the fuel gas and the air entering the porous medium accumulator are strengthened by fully utilizing the combustion and the radiation heat exchange of the inner gaps of the porous medium accumulator. In addition, the flow controllability of the fuel pipe and the air inlet pipe of the air box ensures that a reasonable mixing space and the full section of the mixed gas in the porous medium heat accumulator are full according to load requirements when the boiler operates.

The burner of the invention can complete the mixing, ignition and vigorous combustion of fuel gas and oxidant in the burner precombustion chamber at the front section of the hearth, and the heat exchange quantity of the boiler hearth wall surface is small and the heat storage function of the porous medium provides enough ignition heat and higher combustion thermodynamic conditions for the combustion of low-quality fuel gas. This promotes ignition of the gas; on the other hand, the combustion of the fuel gas is further enhanced by the high-temperature environment atmosphere in the heat accumulator, the combustion speed of the fuel gas is accelerated, the phenomenon that the temperature of the flue gas is rapidly reduced and the fire is further extinguished due to excessive heat absorption of a boiler furnace is avoided, and the problem that the fuel gas is difficult to burn out can be effectively avoided.

Drawings

FIG. 1 is a schematic view of a gas burner;

FIG. 2 is a schematic structural view of the air flow nozzle, wherein A is a left side view and B is a sectional view;

FIG. 3 is a schematic structural view of a windbox end plate, wherein A is a sectional view and B is a left side view;

FIG. 4 is a schematic structural view of a bellows flange, wherein A is a left side view and B is a sectional view;

FIG. 5 is a schematic structural view of a bellows connecting flange, wherein A is a sectional view and B is a left side view;

FIG. 6 is a schematic structural diagram of a water cooling jacket connecting flange, wherein A is a left side view and B is a sectional view.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 6, the gas burner of the present invention uses air as a combustion improver. The combustion-supporting air is connected with an external air inlet pipe or an air blower output flange through a connecting air box air inlet pipe 7 and is sent into an air box cylinder 6, and after passing through an air box end plate 5, the combustion-supporting air enters a positioning pipe 2 and reaches an air pipe 1 through the positioning pipe 2 to be mixed with fuel gas from a fuel pipe 3.

The combustion-supporting air and the fuel gas can be mixed in the gap cavity between the airflow nozzles, and the fuel gas airflow can also be mixed after being expanded in the combustion chamber. The gas and the combustion air are further mixed in the space behind the combustion chamber to form mixed combustible gas which fills the whole section of the inner tube of the burner. The combustible mixture is ejected as a direct jet and then enters the combustion chamber, and the mixed gas is ignited by the ignition sleeve 23 and rapidly burned.

The air flow nozzle and the combustion chamber are mutually connected with an air box flange 4 of the welding air flow nozzle through an air box connecting flange 13 welded on an outer cylinder body of the combustor, and the two flanges are sealed through asbestos gaskets with the functions of fire resistance and heat preservation. The nozzle and the combustion chamber form a separable structure, so that the combustion chamber is convenient to clean, and the influence of impurities on combustion is reduced. The round steel 12 is conveniently moved and positioned, and the porous medium body 19 is replaced according to the requirement.

The pre-combustion chamber of the invention is connected and assembled into a whole by a pin 21 through a through hole on the inner cylinder body and a positioning pin 20 of the mixing chamber, and is sealed by an asbestos gasket 22 with the functions of fire resistance and heat preservation. The mixing chamber and the pre-combustion chamber form a separable and adjustable structure. The length of the combustion chamber can be adjusted by switching the pin 21 and the pilot pin 20 as required.

The burner is connected with the flue gas inlet flange through a cold water jacket connecting flange 15 welded on an outer cylinder body of the burner, and the two flanges are sealed through asbestos gaskets with the functions of fire resistance and heat preservation.

The air inlet pipe 7 and the air box cylinder 6 of the invention are welded at the air box end plate 5 and are communicated with the air flow nozzle, so that air enters the air pipe 1 which reaches the air flow nozzle through the air box cylinder 6 from the air inlet pipe 7 of the air box and is mixed with the fuel gas in the fuel pipe 3.

The fuel pipe 3 in the modularized gas burner is supported by the positioning pipe 2, and the positioning pipe 2 is fixed in the airflow nozzle by welding or positioning pins. A certain gap is formed between the outer cylinder body of the positioning pipe 2 and the air box cylinder body 6 so as to facilitate the installation of the air box air inlet pipe 7.

The positioning round steel 12 is arranged in the gas burner, so that a porous medium required by an experiment can be conveniently added. The positioning round steel 12 is a solid cone steel component, and the porous medium is additionally arranged, so that on one hand, the mixed gas can be promoted to catch fire, on the other hand, the porous medium can be used for strengthening the mixing of combustion air and gas, and the combustion speed of the mixed gas is accelerated.

The guide pipe 14 is arranged in the gas burner and used for expanding the mixed gas flow, so that the mixing of combustion-supporting air and gas is enhanced, and the problem that low-quality gas is difficult to burn out can be effectively avoided.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.