Gas power exhaust gas circulation type pure oxygen combustor

Abstract

The utility model discloses a kind of gas power type waste gas circulation type pure oxygen combustor, it is related to burner technical field;And the utility model includes combustor shell, the top of combustor shell is respectively provided with gas inlet and oxygen inlet, the bottom of combustor shell is respectively provided with hot waste gas inlet and with hot waste gas mixed flame jet opening;In the utility model, by the gas acceleration and oxygen cyclone integrated disc of being set, gas acceleration and oxygen cyclone integrated disc can accelerate oxygen and form cyclone, can effectively speed up low-pressure oxygen, and the jet head is cooled by cyclone;By making reducing in gas jet opening to speed up gas, make gas participate in mixing simultaneously, form pneumatic negative pressure effect;It can effectively inhale a large amount of high-temperature hot waste gas to participate in combustion again, form flame influence area big, visible flame length can reach 2.5 meters or more;With hot waste gas mixed flame jet opening adopts SiC material or Cu material, can effectively avoid the influence of high temperature on combustor structure.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, specifically a gas-powered exhaust gas recirculation type pure oxygen burner. Background Technology

[0002] In the steelmaking process, the ladles and tundishes need to be baked. Currently, the combustion-supporting gas is generally assisted by blasting. However, for some low-calorific-value gases, the flame temperature is too low to meet the usage requirements, or if they are used for a long time, the emissions will exceed the standards and energy will be wasted. However, the application of existing pure oxygen burners in fields such as steel ladles and tundishes is not yet fully mature. Generally, two gases are directly injected into the heated space through two pipes for diffuse combustion. This results in problems such as a short flame, difficulty in controlling the degree of dispersion, slow heating rate, and excessively high control requirements. In particular, when used in scenarios where the steel ladle is relatively large or the tundish has poor sealing, problems such as slow bottom temperature rise and insufficient gas mixing are significant. Utility Model Content

[0003] In order to solve the problems of short flame, difficulty in controlling the dispersion and slow heating rate of pure oxygen burners in the prior art, the purpose of this utility model is to provide a gas-powered exhaust gas recirculation type pure oxygen burner.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a gas-powered exhaust gas recirculation type pure oxygen burner, comprising a burner shell, wherein a gas inlet and an oxygen inlet are respectively provided at the top of the burner shell, and a hot exhaust gas inlet and a hot exhaust gas mixing nozzle are respectively provided at the bottom of the burner shell, wherein the gas inlet penetrates the burner shell; The burner housing is equipped with a gas acceleration and oxygen swirl integrated disk. The gas inlet passes through the gas acceleration and oxygen swirl integrated disk. One end of the hot exhaust gas inlet is connected to the gas acceleration and oxygen swirl integrated disk. The hot exhaust gas mixing nozzle is located at the bottom of the gas inlet. One end of the oxygen inlet is connected to the gas acceleration and oxygen swirl integrated disk.

[0005] Preferably, eight hot exhaust gas inlets are provided.

[0006] Preferably, the gas inlet and oxygen inlet are made of 304 stainless steel pipes.

[0007] Preferably, the integrated gas acceleration and oxygen swirl disk is made of 2520 stainless steel.

[0008] Preferably, the heated exhaust gas mixing nozzle is made of SiC or Cu material.

[0009] Preferably, the nozzle of the heated exhaust gas mixing nozzle is any one of a circular, square, or regular polygonal structure.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In this utility model, the integrated gas acceleration and oxygen swirl disk can accelerate oxygen and form a swirl, which can effectively speed up low-pressure oxygen and cool the nozzle through the swirl. 2. In this utility model, the gas is accelerated by changing the diameter at the gas nozzle, so that the gas forms a pneumatic negative pressure effect while participating in the mixing. 3. In this utility model, a large amount of high-temperature hot exhaust gas can be effectively absorbed and re-entered into combustion, forming a large flame-affected zone, with the visible flame length reaching more than 2.5 meters; 4. In this utility model, the hot exhaust gas mixing nozzle is made of SiC or Cu material, which can effectively avoid the impact of high temperature on the burner structure. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of a gas-powered exhaust gas recirculation type pure oxygen burner according to this utility model.

[0013] Figure 2 This is a schematic diagram of the composition and structure of a gas-powered exhaust gas recirculation type pure oxygen burner according to this utility model.

[0014] Figure 3 This is a schematic diagram of the airflow field in the mixed region of this utility model.

[0015] Figure 4 This is a schematic diagram showing the division of internal temperature zones and the direction of hot waste gas flow during the baking process of the conventional pure oxygen burner of this utility model.

[0016] Figure 5 This is a schematic diagram showing the internal temperature zone division and hot waste gas flow direction of the gas-powered, secondary-utilization pure oxygen burner during baking.

[0017] In the diagram: 10. Burner shell; 1. Gas inlet; 2. Oxygen inlet; 3. Integrated gas acceleration and oxygen swirl disc; 4. Hot exhaust gas inlet; 5. Hot exhaust gas mixing nozzle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Figure 1-5 As shown, this utility model provides a gas-powered exhaust gas recirculation type pure oxygen burner, including a burner shell 10. The top of the burner shell 10 is respectively provided with a gas inlet 1 and an oxygen inlet 2, and the bottom of the burner shell 10 is respectively provided with a hot exhaust gas inlet 4 and a hot exhaust gas mixing nozzle 5. There are eight hot exhaust gas inlets 4, and the gas inlet 1 penetrates through the burner shell 10. The burner housing 10 is equipped with a gas acceleration and oxygen swirl integrated plate 3. The gas inlet 1 passes through the gas acceleration and oxygen swirl integrated plate 3. One end of the hot exhaust gas inlet 4 is connected to the gas acceleration and oxygen swirl integrated plate 3. The hot exhaust gas mixing nozzle 5 is located at the bottom of the gas inlet 1. One end of the oxygen inlet 2 is connected to the gas acceleration and oxygen swirl integrated plate 3.

[0020] Gas inlet 1 and oxygen inlet 2 are made of 304 stainless steel pipes.

[0021] The integrated gas acceleration and oxygen swirl disc 3 is made of 2520 stainless steel.

[0022] The heated exhaust gas mixing nozzle 5 is made of SiC or Cu material.

[0023] The nozzle of the heated exhaust gas mixing nozzle 5 can be any one of a circular, square, or regular polygonal structure.

[0024] Working principle: During use, coal gas enters through coal gas inlet 1 and oxygen enters through oxygen inlet 2. When the incoming oxygen and coal gas are ejected through the nozzle at the gas acceleration and oxygen swirl integrated plate 3, a huge negative pressure is generated at the mixing port, which can effectively draw in high-temperature hot waste gas along the channel of hot waste gas inlet 4 (the gas power mechanism utilizes the hot waste gas). The drawn-in high-temperature hot waste gas is the product of the previous combustion, with a temperature of over 800℃. After being swirled by the gas acceleration and oxygen swirl integrated plate 3, it is fully mixed with the oxygen-fuel mixture, which can effectively increase the gas volume, i.e. the size of the flame appearance. Traditional burners directly discharge hot exhaust gas without secondary utilization. In contrast, gas-powered pure oxygen burners that utilize hot exhaust gas can recycle the hot exhaust gas without excessively consuming the heat generated by combustion. The oxygen-fuel mixture, after being preheated at this temperature, has a larger combustion expansion coefficient, and the hot exhaust gas undergoes two heat exchanges, resulting in higher heat utilization.

[0025] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A gas-powered exhaust gas recirculation type pure oxygen burner, comprising a burner shell (10), characterized in that: The burner housing (10) is provided with a gas inlet (1) and an oxygen inlet (2) at the top and a hot exhaust gas inlet (4) and a hot exhaust gas mixing nozzle (5) at the bottom. The gas inlet (1) penetrates the burner housing (10). The burner housing (10) is provided with a gas acceleration and oxygen swirl integrated disk (3), the gas inlet (1) passes through the gas acceleration and oxygen swirl integrated disk (3), one end of the hot exhaust gas inlet (4) is connected to the gas acceleration and oxygen swirl integrated disk (3), the hot exhaust gas mixing nozzle (5) is located at the bottom of the gas inlet (1), and one end of the oxygen inlet (2) is connected to the gas acceleration and oxygen swirl integrated disk (3).

2. The gas-powered exhaust gas recirculation type pure oxygen burner as described in claim 1, characterized in that, The hot exhaust gas inlet (4) is provided in eight places.

3. The gas-powered exhaust gas recirculation type pure oxygen burner as described in claim 1, characterized in that, The gas inlet (1) and oxygen inlet (2) are made of 304 stainless steel pipes.

4. A gas-powered exhaust gas recirculation type pure oxygen burner as described in claim 1, characterized in that, The gas acceleration and oxygen swirl integrated disk (3) is made of 2520 stainless steel.

5. A gas-powered exhaust gas recirculation type pure oxygen burner as described in claim 1, characterized in that, The heated exhaust gas mixing nozzle (5) is made of SiC or Cu material.

6. A gas-powered exhaust gas recirculation type pure oxygen burner as described in claim 1, characterized in that, The nozzle of the heated exhaust gas mixing nozzle (5) can be any one of a circular, square, or regular polygonal structure.

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