A new type of acid gas and waste sulfuric acid combined treatment combustion machine

Abstract

The utility model belongs to waste acid treatment technical field relates to a novel acid gas and waste sulfuric acid combined treatment combustion engine, including the barrel, one end of barrel is equipped with waste sulfuric acid inlet pipe, liquid gas, acid gas combination spray gun, automatic ignition gun, the lateral wall of barrel is equipped with normal temperature air inlet, waste sulfuric acid inlet pipe is placed in the barrel center and extends into the barrel, and the front end is equipped with waste sulfuric acid booster atomizer, automatic ignition gun extends into the barrel, and the front end is close to the atomization area of waste sulfuric acid booster atomizer. The utility model can efficiently treat the sulfur hydrogen acid gas, realizes sulfur hydrogen, waste sulfuric acid efficient combined treatment, has stable structure, convenient operation, reliable performance and so on.

Description

Technical Field

[0001] This utility model belongs to the field of waste acid treatment technology, specifically relating to a novel combustor for the combined treatment of acidic gas and waste sulfuric acid. Background Technology

[0002] Currently, alkylation refining plants generate various hydrogen sulfide-containing acidic gases and waste sulfuric acid during production. The main components of the acidic gases are H2S, CO2, and H2O. The main components of the waste sulfuric acid are H2SO4, H2O, and a small amount of organic matter. One existing treatment method is a dry sulfuric acid production technology, which involves incinerating, purifying, dry-absorbing, and converting the hydrogen sulfide-containing acidic gases and waste sulfuric acid to produce concentrated sulfuric acid.

[0003] In dry sulfuric acid production technology, the incineration process uses an incinerator with an internal temperature of 1000–1200℃ to incinerate hydrogen sulfide-containing acidic gas and waste sulfuric acid, producing SO2-containing flue gas. Existing technology uses an acidic gas burner at the center of the incinerator burner head, and waste sulfuric acid spray guns at the top or side of the burner head. The acidic gas burner is used to incinerate the hydrogen sulfide-containing acidic gas; the waste sulfuric acid spray guns are used to atomize the waste sulfuric acid. The acidic gas burner provides the heat for the decomposition reaction of sulfuric acid.

[0004] The existing dry sulfuric acid production technology incinerators have the following problems with the furnace head treatment equipment: (1) The acid gas burner and the waste sulfuric acid spray gun are set up separately. The waste sulfuric acid spray gun is located away from the flame center of the acid gas burner, resulting in uneven heating, delayed decomposition reaction of waste sulfuric acid, and low decomposition efficiency. (2) The separate setting of the acid gas burner and the waste sulfuric acid spray gun occupies a large space in the furnace head. The waste sulfuric acid spray gun is close to the inner wall of the incinerator, which makes it very easy for waste sulfuric acid to be sprayed onto the refractory lining of the inner wall of the incinerator, causing damage to the decomposition furnace equipment, dripping of waste sulfuric acid, and incomplete decomposition. Even in some small-scale devices, the acid gas burner and the waste sulfuric acid spray gun are not installed in a normal position, which affects the application of this sulfuric acid production technology. (3) The existing waste sulfuric acid spray gun uses atomized compressed air, which requires a large amount of atomized air for atomization. In addition, in order to protect the waste sulfuric acid spray gun from the high temperature radiant heat, the waste sulfuric acid spray gun needs to be equipped with cooling protection compressed air to ensure the service life of the waste sulfuric acid spray gun, which greatly increases the amount of compressed air used. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing conventional acid gas burners and waste sulfuric acid incineration methods by proposing a novel combined acid gas and waste sulfuric acid treatment burner. This equipment can efficiently treat acid gas containing hydrogen sulfide, achieving efficient combined treatment of hydrogen sulfide and waste sulfuric acid.

[0006] The main technical solution of this utility model is as follows: A novel combined acid gas and waste sulfuric acid treatment burner, characterized in that it includes a cylinder, one end of which is provided with a waste sulfuric acid inlet pipe, a liquefied gas and acid gas combined spray gun, and an automatic ignition gun; the side wall of the cylinder is provided with a normal temperature air inlet; the waste sulfuric acid inlet pipe is placed in the center of the cylinder and extends into the cylinder, and the front end of the waste sulfuric acid inlet pipe is provided with a waste sulfuric acid booster atomizer; the automatic ignition gun extends into the cylinder, and the front end of the automatic ignition gun is close to the atomization zone of the waste sulfuric acid booster atomizer.

[0007] Furthermore, the cylinder is lined with refractory bricks.

[0008] More preferably, the cylinder is lined with 300mm thick refractory bricks made of 304 stainless steel.

[0009] More preferably, high-strength annular swirl blades are provided near the inner side of the refractory brick.

[0010] More preferably, the annular swirl blade has an umbrella-shaped asymmetrical vortex structure, which is welded in a block form to the burner cylinder near the flame zone, and the support is embedded in the refractory bricks at the rear of the burner. The annular swirl blade has an umbrella-shaped asymmetrical vortex structure, which can achieve efficient mixing. The structure is reasonably designed and durable. The mixing conditions can also be optimized by adjusting the umbrella angle and vortex shape through simulation calculations.

[0011] Furthermore, the automatic ignition gun is equipped with an ignition air supply port.

[0012] Furthermore, the cylinder is equipped with a combined ultraviolet and infrared flame detection device.

[0013] Furthermore, the waste sulfuric acid booster atomizer is a high-pressure supersonic vortex atomizer.

[0014] More preferably, the high-pressure supersonic vortex atomizer has an orifice diameter of 0.5 mm, an orifice shape of fan shape, and a pressure of 1-2 MPa. The atomizer nozzle is based on the mechanical atomizing nozzle of a liquid sulfur spray gun, improving the atomization effect of waste acid droplets through techniques such as reducing the orifice size, changing the orifice shape, and altering the medium's movement trajectory. The pressure is derived from a waste sulfuric acid delivery pump.

[0015] More preferably, the droplets produced by the high-pressure supersonic vortex atomizer are less than 50 micrometers.

[0016] Furthermore, the cylinder is installed on the incinerator burner head via a connecting flange on the outer wall of the cylinder.

[0017] The acid gas and waste sulfuric acid combined treatment burner of this utility model is installed in the incinerator burner head by flange connection. The whole material is 304 stainless steel and lined with refractory bricks. The maximum heat resistance temperature can reach 1500℃.

[0018] This invention utilizes hydrogen sulfide acid gas, liquefied petroleum gas (LPG), and ambient air, each fed into the furnace via its respective inlet on a burner. Waste sulfuric acid is fully atomized by a booster atomizer before entering the furnace. The combustion of hydrogen sulfide acid gas and LPG is exothermic, with the flame temperature reaching 1700℃. The waste sulfuric acid decomposes into an endothermic reaction at a temperature of 1000–1200℃. The waste sulfuric acid is injected into the center of the burner, with the fuel flame surrounding the waste sulfuric acid droplets, enveloping them and injecting them into the incinerator chamber. This results in more uniform heating of the waste sulfuric acid droplets, improved decomposition efficiency, and effectively reduced residence time of flue gas within the incinerator, significantly reducing the incinerator's size and footprint.

[0019] Liquefied petroleum gas (LPG) is used as a continuous flame fuel for lamps and start-up operations, providing a stable flame. The burner features high-strength annular swirl blades near the inner side of the refractory bricks. The swirling flow of ambient air and hydrogen sulfide-containing acidic gas enters the combustion chamber, creating a secondary mixture that accelerates combustion.

[0020] Waste sulfuric acid is fed into the incinerator via a high-pressure supersonic vortex atomizer. The waste sulfuric acid is injected into the furnace using a high-pressure supersonic vortex atomizer, ensuring thorough atomization. No atomizing compressed air is used, avoiding fluctuations in combustion efficiency caused by compressed air. The waste sulfuric acid inlet and atomizing nozzle operate under a ambient air protective atmosphere, eliminating the need for cooling compressed air and thus improving energy efficiency. The parts of the waste sulfuric acid booster atomizer that come into contact with the flame are made of silicon carbide, which is resistant to high temperatures and corrosion.

[0021] This invention features a high-energy explosion-proof automatic igniter with low discharge voltage and high energy, enabling safe, rapid, and continuous automatic ignition. After ignition, it automatically exits the burner's combustion zone, increasing ignition efficiency and service life.

[0022] This invention is equipped with a combined ultraviolet and infrared flame detection device. Specifically designed for the flame characteristics of hydrogen sulfide and liquefied petroleum gas composite fuels, it increases the stability of the flame signal and improves reliability.

[0023] This utility model relates to a combined combustion unit for treating acidic gas and waste sulfuric acid. It features high efficiency in the combustion reaction of acidic gas, uniform heating of waste sulfuric acid upon entering the furnace, rapid decomposition, and high decomposition efficiency. The combined unit requires minimal furnace head space and can be used in both large and small incinerators. The equipment boasts high processing efficiency and effectively protects the waste sulfuric acid spray nozzle without the need for cooling and protective compressed air, resulting in greater energy savings and extended nozzle lifespan. It also features stable structure, convenient operation, and reliable performance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the novel acid gas and waste sulfuric acid combined treatment burner according to an embodiment of this utility model.

[0025] In the diagram, 1-cylinder, 2-waste sulfuric acid inlet pipe, 3-liquefied gas and acid gas combined spray gun, 4-normal temperature air inlet, 5-automatic ignition gun, 6-ignition air supply port, 7-ultraviolet and infrared combined flame detection device, 8-refractory brick lining, 9-connecting flange, 10-waste sulfuric acid booster atomizer. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the embodiments and accompanying drawings. Example

[0027] Reference Appendix for a Novel Combustion Engine for Combined Treatment of Acidic Gas and Waste Sulfuric Acid Figure 1 It mainly includes a cylinder 1. One end of the cylinder 1 is provided with a waste sulfuric acid inlet pipe 2, a liquefied gas and acid gas combined spray gun 3, and an automatic ignition gun 5. The side wall of the cylinder 1 is provided with a normal temperature air inlet 4. The waste sulfuric acid inlet pipe 2 is placed in the center of the cylinder 1 and extends into the cylinder 1. The front end of the waste sulfuric acid inlet pipe 2 is provided with a waste sulfuric acid booster atomizer 10. The automatic ignition gun 5 extends into the cylinder 1. The front end of the automatic ignition gun 5 is close to the atomization area of ​​the waste sulfuric acid booster atomizer 10. The automatic ignition gun 5 is provided with an ignition air supply port 6.

[0028] In this embodiment, the combined burner is installed on the incinerator burner head via the connecting flange 9 on the outer wall of the cylinder 1. The entire structure is made of 304 stainless steel, lined with a 300mm thick refractory brick lining 8, with a maximum heat resistance temperature of up to 1500℃.

[0029] In this embodiment, high-strength annular swirl blades are disposed near the inner side of the refractory brick lining 8. The annular swirl blades are welded to the burner casing in a modular form, and the support is embedded in the refractory brick at the rear of the burner, close to the flame zone. The annular swirl blades have an umbrella-shaped asymmetrical vortex structure. This device is close to the inner lining, and the swirl blades are close to the flame zone, without affecting or occupying other channels.

[0030] In this embodiment, the waste sulfuric acid booster atomizer 10 is a high-pressure supersonic vortex atomizer with a diameter of 0.5 mm and a fan-shaped orifice. The waste sulfuric acid pressure is increased to 1.25 MPa by the delivery pump.

[0031] During operation, hydrogen sulfide-containing acidic gas, waste sulfuric acid, liquefied petroleum gas, and ambient air enter the incinerator furnace through their respective flow channels and nozzles on the burner via the combined burner. Waste sulfuric acid is injected at the center of the combined burner, and the fuel combustion flame surrounds the waste sulfuric acid droplets, both being injected into the incinerator furnace together.

[0032] Liquefied petroleum gas (LPG) is used as a continuous flame for lamps and as fuel for start-up operations, providing a stable flame. When ambient air and hydrogen sulfide-containing acidic gas enter the combustion chamber, they swirl, creating a secondary mixture that accelerates combustion.

[0033] Waste sulfuric acid, as the waste liquid to be treated, is injected into the furnace using a high-pressure supersonic vortex atomizer. No atomizing compressed air or cooling / protecting compressed air is used, resulting in droplets smaller than 50 micrometers. The parts of the waste sulfuric acid booster atomizer that come into contact with the flame are made of silicon carbide, which is resistant to high temperatures and corrosion.

[0034] The ignition method is explosion-proof high-energy automatic ignition, which is safe and fast. The flame detection of the burner adopts a combination of ultraviolet and infrared flame detection methods, which increases the stability of the flame signal.

[0035] This embodiment features a novel combined combustion burner for treating acidic gas and waste sulfuric acid. The acidic gas combustion reaction is highly efficient, with hydrogen sulfide almost completely burned. The waste sulfuric acid is atomized and heated evenly upon entering the furnace, resulting in droplets smaller than 50 micrometers. Compared to conventional atomized droplets (around 100 micrometers), high-pressure supersonic vortex atomization offers superior performance, effectively improving waste sulfuric acid decomposition efficiency and reducing the size and footprint of the incinerator. Waste sulfuric acid is injected into the center of the combined burner, while the fuel combustion flame surrounds the waste sulfuric acid droplets, also being injected into the furnace. This ensures more uniform heating of the waste sulfuric acid droplets and better decomposition efficiency. The decomposition reaction is rapid, achieving a decomposition efficiency of over 99.5%. Without the need for cooling protection compressed air and atomizing compressed air, the equipment effectively extends the service life of the waste sulfuric acid spray gun, saving 350 kg of compressed air per ton of waste sulfuric acid treated, resulting in greater energy savings. The combined equipment requires minimal furnace head space and can be used in both large and small incinerators. It boasts advantages such as stable structure, convenient operation, and reliable performance.

Claims

1. A novel combined combustion generator for treating acidic gas and waste sulfuric acid, characterized in that... It includes a cylinder, one end of which is equipped with a waste sulfuric acid inlet pipe, a liquefied gas and acid gas combined spray gun, and an automatic ignition gun. The side wall of the cylinder is equipped with a normal temperature air inlet. The waste sulfuric acid inlet pipe is located in the center of the cylinder and extends into the cylinder. The front end of the waste sulfuric acid inlet pipe is equipped with a waste sulfuric acid booster atomizer. The automatic ignition gun extends into the cylinder, and the front end of the automatic ignition gun is close to the outlet area of ​​the liquefied gas and acid gas combined spray gun.

2. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 1, characterized in that... The cylinder is lined with refractory bricks.

3. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 2, characterized in that... The cylinder is made of 304 stainless steel and lined with 300mm thick refractory bricks.

4. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 2 or 3, characterized in that... High-strength annular swirl blades are installed near the inner side of the refractory brick.

5. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 4, characterized in that... The annular swirl blades have an umbrella-shaped asymmetrical vortex structure and are welded in the form of blocks into the burner cylinder near the flame zone. The support is embedded in the refractory bricks at the rear of the burner.

6. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 1, characterized in that... The automatic ignition gun is equipped with an ignition air supply port.

7. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 1, characterized in that... The cylinder is equipped with a combined ultraviolet and infrared flame detection device.

8. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 1, characterized in that... The waste sulfuric acid booster atomizer is a high-pressure supersonic vortex atomizer.

9. The novel combined combustion generator for treating acidic gas and waste sulfuric acid according to claim 8, characterized in that... The high-pressure supersonic vortex atomizer has an aperture of 0.5 mm, a fan-shaped aperture, a pressure of 1-2 MPa, and produces droplets smaller than 50 micrometers after atomization.

10. The novel combined treatment burner for acidic gas and waste sulfuric acid according to claim 1, characterized in that... The cylinder is installed on the incinerator burner head via a connecting flange on the outer wall of the cylinder.

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