Refining and chemical gas generator set and application

Abstract

The invention relates to internal combustion engines, in particular to the technical field of gas engines, in particular to a refining and chemical gas generator set and application, the refining and chemical gas generator set comprises an air cylinder, a gas path, an air path and an air throttle, the gas path and the air path directly supply gas to the air cylinder, gas and air are mixed in the air cylinder, and the refining and chemical gas generator set further comprises an air-fuel ratio control device. The air-fuel ratio control device controls the proportion of fuel gas and air entering the air cylinder. According to the fuel gas generator set for providing the refined gas, the mode that fuel gas and air enter the air cylinders through independent gas paths respectively, are mixed in the air cylinders and are combusted to do work is adopted, and the tempering problem that refined tail gas serves as fuel gas of an engine is solved. Gas and air are independently fed, and the power is improved by adopting a double-pressurization technology. Fuel gas and air are automatically controlled, automatic adjustment of the air-fuel ratio is achieved, independent control can be achieved by judging the combustion condition of each cylinder, and stable operation of the engine is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, in particular gas engines, and in particular to a refinery gas gas generator set and its application. Background Art

[0002] Refinery gas refers to industrial exhaust gas generated by petrochemicals, ore smelting, and other fields. Its combustible components are primarily carbon monoxide, hydrogen, methane, and ethane, and significant amounts of this gas are emitted annually. Using refinery gas to generate electricity through piston internal combustion engines not only saves energy but also reduces emissions, resulting in significant economic and social benefits.

[0003] Existing gas engines use a premixed intake system, where the fuel is thoroughly mixed with air before entering the cylinder. This process typically involves mixing the fuel and air in a mixer before entering the cylinder through an intake manifold. The intake manifold between the mixer and the cylinder head is filled with a large amount of flammable and explosive gas. Due to the complex and variable composition of refinery exhaust and the high dust content, these factors can easily lead to engine backfire. Summary of the Invention

[0004] The inventors analyzed two main factors that cause flashback: dust can easily lead to loose valve closures, and hydrogen burns faster than carbon monoxide and methane. Because the combustion rate of gases under certain operating conditions is inherent, and the sealing of valves is subject to certain probability over extended equipment operation, preventing complete flashback is quite difficult.

[0005] To solve this problem, the first aspect of the present invention provides a refinery gas gas generator set, which adopts separate gas and air intake methods to completely solve the backfire problem, and uses dual-boosting technology to achieve power improvement.

[0006] The refinery gas generator set provided by the present invention includes an engine, a generator, a controller, and a gas circuit and an air circuit of the engine.

[0007] The gas circuit and the air circuit supply gas to the cylinders of the engine respectively, and the gas and air are mixed in the cylinders;

[0008] The gas circuit is connected to a single cylinder of the engine via a single-cylinder gas electric control valve, and the air circuit is directly connected to the single cylinder.

[0009] The installation of a single-cylinder gas electronically controlled valve resolves the conflict between the specific operating conditions of individual cylinders and the requirement for consistent output frequency, while also maintaining a reasonable overall air-fuel ratio through supercharger regulation. By setting a proportional coefficient, the air supply passively follows changes in the gas supply, reducing overall control and response overhead. Building on these two advantages, this allows the controller to quickly find the optimal parameter balance, contributing to stable system operation.

[0010] As a further improvement, the gas circuit is connected to a gas supercharger, and the air circuit is connected to an air supercharger.

[0011] As a further improvement, the gas booster is connected to a gas booster control unit, the air booster is connected to an air booster control unit, and the gas booster control unit and the air booster control unit are connected to a controller.

[0012] As a further improvement, the regulation control provided by the controller includes:

[0013] Control the single-cylinder gas electric control valve of the cylinder according to the rotation speed of the cylinder;

[0014] Control the output pressure of the gas booster according to the load conditions;

[0015] According to the analysis of the engine exhaust components, the proportional coefficient of the output pressure of the gas supercharger and the output pressure of the air supercharger is adjusted.

[0016] A further improvement includes an elastic connector, which ensures a reliable connection between the engine and the generator and transmits the mechanical work of the engine to the generator.

[0017] A further improvement also includes a unit chassis, which is an integral chassis, and the generator and engine are installed on the unit chassis through elastic connectors.

[0018] As a further improvement, the gas supercharger and the air supercharger adopt a centrifugal mechanical supercharge structure.

[0019] As a further improvement, the gas booster and the air booster are connected to their respective gas supply devices through their respective pipelines.

[0020] The application fields of the refinery gas gas generator set of the present invention include: power supply for drilling equipment, power supply for factory areas, and power supply for daily life.

[0021] Technical effects:

[0022] (1) The invention provides a gas-fired generator set using refined petroleum gas, which uses separate gas paths for gas and air to enter the cylinders respectively, mix and burn in the cylinders to produce work, thus solving the backfire problem of refined petroleum tail gas used as engine fuel gas.

[0023] (2) The air-fuel ratio control method is optimized. After the single-cylinder gas electronic control valve is installed, the conflict between the operating conditions of a single cylinder and the requirement for consistent output frequency is resolved, and a reasonable air-fuel ratio is maintained overall through the adjustment of the supercharger; the air supply passively follows the changes in the gas supply, which reduces the control and response costs overall; it is beneficial for the controller to quickly find the optimal parameter balance point, and can judge the combustion conditions of each cylinder to achieve individual control and ensure stable operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 Shows the overall structural diagram of the refinery gas gas generator set;

[0026] Figure 2 Shows a schematic diagram of the air intake structure of a refinery gas-fired power generator set;

[0027] Figure 3 Shown Figure 2 A side section of .

[0028] In the figure: 1. Engine part; 2. Flexible connector; 3. Generator; 4. Unit chassis; 5. Controller; 6. Air booster control unit; 7. Gas booster control unit; 8. Air booster; 9. Gas booster; 10. Gas intake pipe; 11. Air intake pipe; 12. Single-cylinder gas electric control valve. DETAILED DESCRIPTION

[0029] The following will describe the implementation methods of the present application in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] This embodiment of the present invention provides a refinery gas engine. Instead of mixing gas and air before entering the cylinder, as in existing solutions, the gas and air enter the cylinder separately through separate gas paths, where they mix and burn to generate power. This approach addresses the problem of in-cylinder backfire that can easily occur when using refinery gas as an engine fuel. By combining overall air-fuel ratio control with individual cylinder gas control, the stability of air-fuel ratio control and engine operation is improved.

[0031] like Figure 1The figure shows the overall structure of a refinery gas engine. The refinery gas engine comprises an engine 1, a flexible connector 2, a generator 3, a unit chassis 4, and a controller 5. The flexible connector 2 ensures a secure connection between the engine 1 and the generator 3, transferring the mechanical power of the engine 1 to the generator 3. The generator 3 is an electrical energy output unit that can be matched to power generation equipment of different frequencies and voltage levels according to user needs. The unit chassis 4 utilizes an integrated design for easy transportation and installation. The generator 3 and engine 1 are mounted on the unit chassis 4 via the flexible connector 2.

[0032] Engine 1, the core of the unit, utilizes a dual-path intake structure, changing the conventional premixed intake structure to allow air and gas to enter separately and mix in the cylinder. Furthermore, to enhance engine power, a dual-supercharger structure is employed, allowing gas and air to be pressurized separately.

[0033] refer to Figure 1-3 The figure specifically illustrates the engine's air intake system. An air supercharger 8 is connected to an air intake pipe 11, which supplies air to the engine cylinders. A gas supercharger 9 is connected to a gas intake pipe 10, which supplies gas to the engine cylinders. Air intake pipe 11 directly supplies gas to the engine cylinders. A single-cylinder gas electronically controlled valve 12 is installed between gas intake pipe 10 and the engine cylinders to control the amount of gas supplied from gas intake pipe 10 to the engine cylinders.

[0034] Next, we'll discuss air-fuel ratio control. Air booster 8 is connected to air booster control unit 6 to control its output pressure, and gas booster 9 is connected to gas booster control unit 7 to control its output pressure. Air booster control unit 6 and gas booster control unit 7 are controlled by controller 5.

[0035] The controller 5 controls the single-cylinder gas electric control valve 12 according to the rotation speed of the single independent cylinder, thereby adjusting the air-fuel ratio of the single cylinder to ensure the consistency of the output frequency of the motor.

[0036] The controller 5 controls the output pressure of the gas booster according to the load conditions, thereby ensuring the supply of gas and supporting the engine's ability to maintain the speed.

[0037] The controller 5 adjusts the proportionality coefficient between the output pressure of the gas supercharger and the output pressure of the air supercharger based on the analysis of the engine exhaust components, thereby controlling the air-fuel ratio as a whole.

[0038] This resolves the conflict between the specific operating conditions of individual cylinders and the requirement for consistent output frequency, while also maintaining a reasonable overall air-fuel ratio. Secondly, the air supply passively follows changes in the gas supply, reducing overall control and response overhead. Building on these two factors, this helps the controller quickly find the optimal parameter balance, contributing to stable system operation.

[0039] In this embodiment, the gas booster and the air booster adopt a centrifugal mechanical boosting structure. In other embodiments, other mechanical or non-mechanical devices that can adjust the flow rate by using pressure as the control target can also be used.

[0040] The refinery gas engine unit provided in this embodiment solves the flashback problem when using refinery tail gas as engine fuel. It uses separate gas and air intakes and employs dual-supercharging technology to achieve power boost. Automatic gas and air control enables automatic adjustment of the air-fuel ratio. This optimizes air-fuel ratio control and can determine the combustion status of each cylinder to achieve both individual control and overall air-fuel ratio adjustment, ensuring stable engine operation and overall unit stability.

[0041] It's important to note that the air intake pipe directly connecting to the engine cylinder doesn't mean there aren't any valves between the intake pipe and the cylinder combustion chamber. The engine cylinder itself has its own valves, such as intake valves. The fact that the air intake pipe directly supplies air to the engine cylinder doesn't require an actively adjustable flow device between the air intake pipe and the cylinder, as is the case with gas supply. Instead, the air flow at this point between the air intake pipe and the cylinder is passively adjusted based on operating conditions.

[0042] In this embodiment, refinery gas refers to a single or mixed gas whose combustible components are carbon monoxide, hydrogen, methane, etc. The unit used is the plant's 12V190 gas engine and generator set.

[0043] The refinery gas gas generator set provided in this embodiment can be used to power drilling equipment, factory area power supply, daily life power supply, etc.

[0044] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A refinery gas generator set, comprising an engine, a generator, a controller, and a gas circuit and an air circuit of the engine, characterized in that: The gas circuit and the air circuit supply gas to the cylinders of the engine respectively, and the gas and air are mixed in the cylinders; The gas circuit is connected to a single cylinder of the engine via a single-cylinder gas electric control valve, and the air circuit is directly connected to the single cylinder.

2. The refinery gas-fired power generator set according to claim 1, characterized in that: The gas path is connected to a gas supercharger, and the air path is connected to an air supercharger.

3. The refinery gas-fired power generator set according to claim 2, characterized in that: The gas booster is connected to a gas booster control unit, the air booster is connected to an air booster control unit, and the gas booster control unit and the air booster control unit are connected to a controller.

4. The refinery gas-fired power generation unit according to claim 3, characterized in that: The regulation control provided by the controller includes: Control the single-cylinder gas electric control valve of the cylinder according to the rotation speed of the cylinder; Control the output pressure of the gas booster according to the load conditions; According to the analysis of the engine exhaust components, the proportional coefficient of the output pressure of the gas supercharger and the output pressure of the air supercharger is adjusted.

5. The refinery gas-fired power generation unit according to claim 1, characterized in that: It also includes an elastic connector, which ensures that the engine and the generator are reliably connected and transmits the mechanical work of the engine to the generator.

6. The refinery gas-fired power generator set according to claim 5, characterized in that: It also includes a unit chassis, which adopts an integral chassis, and the generator and the engine are installed on the unit chassis through elastic connectors.

7. The refinery gas-fired power generator set according to claim 3, characterized in that: The gas supercharger and the air supercharger adopt a centrifugal mechanical supercharge structure.

8. The refinery gas-fired power generation unit according to claim 7, characterized in that: The gas booster and the air booster are connected to their respective gas supply devices through their respective pipelines.

9. Application of the refinery gas power generator set according to any one of claims 1 to 8, characterized in that: The applications include power supply for drilling equipment, factory area, and daily life.

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