Ammonia-fueled zero-carbon combustor

Abstract

The utility model relates to a kind of zero-carbon burner of ammonia combustion, including burner shell, cyclone barrel, flue brick, eternal light and ammonia gas lance, the inner center of the burner shell is equipped with cyclone barrel, the cyclone barrel is fixed by the connecting cone cylinder in the top inside of burner shell, flue brick is installed above burner shell, flue brick is equipped with combustion channel, ammonia gas lance is inserted into the inner cylinder of cyclone barrel from the bottom of burner shell, the top ammonia gas spray head of ammonia gas lance enters the inner cavity of connecting cone cylinder, the inner cavity of connecting cone cylinder is communicated with combustion channel, combustion air enters the cyclone channel of cyclone barrel from the bottom of burner shell. The utility model uses clean fuel ammonia gas to replace fossil energy fuel, improves ammonia gas combustion activity by cyclone barrel, strengthens the mixing of ammonia gas and air, and the generation of CO2 is eliminated after combustion, realizes double carbon target.

Description

Technical Field

[0001] This utility model relates to the field of industrial burner technology, specifically to an ammonia-fired zero-carbon burner, suitable for industrial heating furnaces such as those used in oil refining, chemical, and coal chemical industries. Background Technology

[0002] The main business of oil refining and chemical engineering is to reduce pollutant emissions and design and produce environmentally friendly oil refining and chemical plants, which is mainly reflected in energy saving (achieving the same heat transfer effect with less fuel gas compared to the original operating conditions).

[0003] In order to achieve the goals of carbon peaking and carbon neutrality on schedule and realize zero CO2 emissions, it is urgent to design an ammonia-fired zero-carbon burner that uses clean ammonia as fuel. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an ammonia-fired zero-carbon burner that uses clean ammonia to replace fossil fuels, improves the combustion activity of ammonia through a swirl tube, enhances the mixing of ammonia and air, and eliminates the generation of CO2 in the flue gas after combustion, thus achieving the dual-carbon goal.

[0005] The purpose of this utility model is achieved as follows: A zero-carbon ammonia burner includes a burner shell, a swirl tube, a fire channel brick, a continuous lamp, and an ammonia spray gun. The swirl tube is located at the center of the burner shell and is fixed by a connecting cone inside the top of the burner shell. The fire channel brick is installed above the burner shell and has a combustion channel inside. The ammonia spray gun extends from the bottom of the burner shell into the inner cylinder of the swirl tube, and the ammonia nozzle at the top of the ammonia spray gun enters the inner cavity of the connecting cone. The inner cavity of the connecting cone communicates with the combustion channel. Combustion air enters the swirl channel of the swirl tube from the bottom of the burner shell.

[0006] Preferably, the swirl tube includes an inner tube and an outer tube arranged concentrically, and multiple swirl plates are evenly distributed around the circumference between the inner tube and the outer tube, forming a swirl channel between adjacent swirl plates.

[0007] Preferably, the burner shell includes a cylinder, a connecting base plate, a mounting panel, and a connecting cone. The upper and lower sides of the cylinder are respectively connected to the connecting base plate and the mounting panel. The fire channel brick is installed on the connecting base plate. The mounting panel is provided with a combustion air inlet. The connecting cone is disposed inside the cylinder, and the top of the connecting cone is connected to the connecting base plate. The small cone opening at the bottom of the connecting cone is connected to the outer cylinder of the swirl tube.

[0008] Preferably, the ammonia nozzle adopts a multi-hole design.

[0009] Preferably, the continuous lamp is located beside the ammonia spray gun, and the continuous lamp nozzle extends into the inner cavity of the connecting cone from the bottom of the burner housing.

[0010] Preferably, the combustion channel has a combustion throat in the upper part.

[0011] The beneficial effects of this utility model are: 1. Zero carbon: The cyclone tube enhances the combustion activity of ammonia and strengthens the mixing of ammonia with air. Since ammonia is used as fuel, no CO2 is generated after combustion (4NH3+3O2=2N2+6H2O). It is one of the preferred fuel gases for achieving carbon peaking, while reducing the emission of greenhouse gas CO2 and protecting the environment.

[0012] 2. Cost reduction and efficiency improvement: By using green energy to synthesize ammonia or by burning the company's surplus ammonia, the company is provided with another combustible fuel while reducing CO2 emissions, which ultimately improves the company's efficiency.

[0013] 3. Short flame: Because ammonia has relatively weak combustion activity and reacts with oxygen at a very slow rate, combustion mainly occurs within the combustion channel, resulting in a relatively short flame. This is very effective for heating furnaces with limited furnace height. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an ammonia-fired zero-carbon burner according to the present invention.

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the cyclone separator.

[0016] The components include: burner shell 1; cylinder 1.1; connecting base plate 1.2; mounting panel 1.3; connecting cone 1.4; swirl tube 2; inner cylinder 2.1; outer cylinder 2.2; swirl plate 2.3; fire channel brick 3; combustion channel 3.1; combustion throat 3.2; continuous lamp 4; continuous lamp nozzle 4.1; ammonia spray gun 5; and ammonia nozzle 5.1. Detailed Implementation

[0017] See Figure 1 and Figure 2This utility model relates to an ammonia-fired zero-carbon burner, comprising a burner housing 1, a swirl tube 2, a fire channel brick 3, a continuous lamp 4, and an ammonia spray gun 5. The swirl tube 2 is centrally located within the burner housing 1 and is fixed by a connecting cone 1.4 at the top of the burner housing 1. The fire channel brick 3 is installed above the burner housing 1 and contains a combustion channel 3.1. The swirl tube 2 includes a concentrically arranged inner cylinder 2.1 and an outer cylinder 2.2. Multiple swirl plates 2.3 are evenly distributed circumferentially between the inner and outer cylinders 2.1 and 2.2. The swirl plates 2.3 are spiral-shaped, forming swirl channels between adjacent swirl plates 2.3. The ammonia spray gun 5 extends from the bottom of the burner housing 1 into the inner cylinder 2.1 of the swirl tube 2. The ammonia nozzle 5.1 at the top of the ammonia spray gun 5 enters the inner cavity of the connecting cone 1.4. The ammonia nozzle employs a multi-hole design to enhance the mixing of ammonia and air, improve combustion efficiency, and reduce ammonia leakage.

[0018] The inner cavity of the connecting cone 1.4 is connected to the combustion channel 3.1. The continuous lamp 4 is located beside the ammonia spray gun 5. The continuous lamp 4 is an important component for ignition and protection of combustion. It is mainly used to ignite the main flame and ignite it in time when the main flame goes out. The flame of the continuous lamp must be able to burn stably to ensure that the flame of the continuous lamp can ignite the ammonia main flame in time. The continuous lamp 4 extends from the bottom of the burner housing 1, and its continuous lamp nozzle 4.1 extends into the inner cavity of the connecting cone 1.4.

[0019] The burner shell 1 is composed of a cylindrical body 1.1, a connecting base plate 1.2, a mounting panel 1.3, and a connecting cone 1.4. The upper and lower sides of the cylindrical body 1.1 are respectively connected to the connecting base plate 1.2 and the mounting panel 1.3. The fire channel brick 3 is installed on the connecting base plate 1.2. The mounting panel 1.3 is provided with a combustion air inlet. The connecting cone 1.4 is set inside the cylindrical body 1.1, and the top of the connecting cone 1.4 is connected to the connecting base plate 1.2. The small cone opening at the bottom of the connecting cone 1.4 is connected to the outer cylinder 2.2 of the swirl tube 2.

[0020] The combustion channel 3.1 is provided with a combustion throat 3.2 in the upper part. The combustion throat 3.2 is located at 1 / 3 of the distance from the top of the fire channel brick 3. The combustion channel 3.2 and the combustion throat 3.1 are important places for the formation of flame. Since ammonia has relatively weak combustion activity and reacts with oxygen at a very slow rate, in order to further enhance the mixing of ammonia and air, the height of the fire channel brick 3 is selected to be more than 0.6m, so as to obtain a longer combustion channel and extend the contact time with air to ensure complete combustion.

[0021] Working principle: Because ammonia has poor combustion reactivity, a swirl tube is needed to enhance the mixing of ammonia with a large amount of air in order to improve its reactivity. Specifically, the combustion air enters the swirl tube from the bottom of the burner shell. Under the action of the swirl plate, the airflow is forced to change its direction of movement, from linear motion to high-speed rotational motion. The swirled air is fully mixed with the ammonia entering the inner cavity of the connecting cone, and a combustion flame is formed in the fire channel. The flame is accelerated and injected into the throat for combustion. Finally, CO2 generation is eliminated in the flue gas after combustion, achieving the dual carbon target.

[0022] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A zero-carbon ammonia burner, characterized in that: The device includes a burner housing, a swirl tube, a fire channel brick, a continuous lamp, and an ammonia spray gun. The swirl tube is located at the center of the burner housing and is fixed by a connecting cone inside the top of the burner housing. The fire channel brick is installed above the burner housing and has a combustion channel inside. The ammonia spray gun extends from the bottom of the burner housing into the inner cylinder of the swirl tube, and the ammonia nozzle at the top of the ammonia spray gun enters the inner cavity of the connecting cone. The inner cavity of the connecting cone is connected to the combustion channel. Combustion air enters the swirl channel of the swirl tube from the bottom of the burner housing. The swirling cylinder includes an inner cylinder and an outer cylinder arranged concentrically. Multiple swirling plates are evenly distributed circumferentially between the inner cylinder and the outer cylinder, and a strong swirling channel is formed between adjacent swirling plates. The burner shell includes a cylinder, a connecting base plate, a mounting panel, and a connecting cone. The upper and lower sides of the cylinder are respectively connected to the connecting base plate and the mounting panel. The fire channel brick is installed on the connecting base plate. The mounting panel is provided with a combustion air inlet. The connecting cone is set inside the cylinder, and the top of the connecting cone is connected to the connecting base plate. The small cone at the bottom of the connecting cone is connected to the outer cylinder of the swirl tube. The combustion channel is provided with a combustion throat in the upper part. The combustion throat is located at 1 / 3 of the distance from the top of the fire channel brick. The height of the fire channel brick is selected to be more than 0.6m.

2. The ammonia-fired zero-carbon burner according to claim 1, characterized in that: The ammonia nozzle adopts a multi-hole design.

3. The ammonia-fired zero-carbon burner according to claim 1, characterized in that: The continuous lamp is located beside the ammonia spray gun, and its nozzle extends into the inner cavity of the connecting cone from the bottom of the burner housing.

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