CN212958848U

CN212958848U - Fuel control system of biogas generator set

Info

Publication number: CN212958848U
Application number: CN202022014175.1U
Authority: CN
Inventors: 温国生; 彭刚; 王正飞
Original assignee: Chongqing Googol Engine Tech Co ltd
Current assignee: Chongqing Pangu Power Technology Co.,Ltd.
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-04-13
Anticipated expiration: 2030-09-15

Abstract

The utility model relates to a fuel control system of a biogas generator set, which comprises an air inlet pipeline, a gas generator set, an exhaust pipeline and a fuel control ECU; the methane concentration sensor, the valve bank, the fuel throttle valve, the Venturi mixer and the supercharger are sequentially arranged on the air inlet pipeline; the supercharger is communicated with an air inlet of the gas generator set, and an air outlet of the gas generator set is communicated with an exhaust pipeline; a water temperature sensor is arranged on the gas generator set, and the gas generator set is electrically connected with the unit controller; an oxygen sensor is arranged on the exhaust pipeline; the fuel control ECU is electrically connected with the methane concentration sensor, the fuel throttle valve, the unit controller, the water temperature sensor and the oxygen sensor. The utility model discloses can solve the problem of marsh gas generating set automatic start difficulty under different methane concentration, can also meet the suitable air-fuel ratio of automatic adjustment when methane concentration changes at marsh gas generating set continuous operation, promote marsh gas generating set's economic nature and reliability.

Description

Fuel control system of biogas generator set

Technical Field

The utility model relates to a gas generating set, concretely relates to marsh gas generating set fuel control system.

Background

Compared with natural gas, the garbage biogas has the characteristics of high heat value, better anti-explosion performance and the like, and is a good clean fuel. Gases such as methane and carbon dioxide in greenhouse effect and landfill gas are one of the gases causing global warming. If the marsh gas is directly discharged into the atmosphere, the marsh gas not only causes pollution to the environment, but also is extremely easy to explode when the temperature is increased in summer, and is also energy waste. The landfill gas power generation adopts a complete garbage methane collection and utilization concept, and garbage methane is completely utilized through an advanced garbage methane collection system, a conveying system, a methane purification system and a methane power generation system to generate electric power, and the electric power is merged into a large urban power grid to provide clean energy for power consumers.

The methane generator set has the following problems: the automatic start of the unit is difficult under different methane concentrations, and the proper air-fuel ratio cannot be automatically adjusted when the methane concentration changes during continuous operation, so that the economy and the reliability of the methane generator set are reduced.

CN103375286A discloses an adaptive fuel control system, which can be applied to a liquid fuel and gas fuel dual-fuel system or a pure gas fuel type internal combustion engine vehicle, a ship, or a generator set. The liquid fuel can be gasoline, diesel oil, heavy oil, methanol, etc. The gas fuel can be made by mixing natural gas, coke oven gas, marsh gas, pure methane gas, pure hydrogen gas or other non-combustible gas according to any proportion. By using the system, the concentration of hydrogen and methane in the fuel line can be monitored in real time. The electronic control unit sends corresponding control instructions and parameters to control according to different fuel characteristics, and can perform closed-loop control according to system real-time feedback data. The system can be used for realizing the switching between liquid fuel and gas fuel. The self-adaptive gas fuel control system is provided with a pressure reducing valve, a combustible gas sensor and a pressure sensor in an air inlet pipeline, can monitor the concentration of hydrogen or methane gas in real time, and uploads monitoring signals to an Electronic Control Unit (ECU).

CN204827687U discloses "an adaptive gaseous fuel control system", which can automatically identify and control internal combustion engine vehicles, ships or generator sets of various gaseous fuel types. The control system realizes the self-adaptive adjustment control of the corresponding gas fuel. The control system comprises a gas fuel tank, an air inlet pipeline, an electromagnetic valve, a first pressure sensor, a second pressure sensor, a pressure reducing valve, an internal combustion engine and an electronic control unit. The automatic switching control system has the advantages that the combustible gas concentration sensor and the single electronic control unit or the ECU are used for controlling the gas fuel with any component, automatic switching control of various gas fuels is realized, the hardware structure is simple, the cost is low, and the use and the maintenance are convenient. Meanwhile, the user may select a preset fuel or input a fuel type and ratio when the sensor is not activated or activated.

The technical solutions disclosed in the two patent documents are a useful attempt in the technical field.

Disclosure of Invention

The utility model aims at providing a marsh gas generating set fuel control system, it can solve the problem of marsh gas generating set automatic start difficulty under different methane concentration, can also meet the suitable air-fuel ratio of automatic adjustment when methane concentration changes at marsh gas generating set continuous operation, promotes marsh gas generating set's economic nature and reliability.

A biogas generating set fuel control system, including admission line, gas generating set, exhaust duct and fuel control ECU, characterized by: the methane concentration sensor, the valve bank, the fuel throttle valve, the Venturi mixer and the supercharger are sequentially arranged on the air inlet pipeline;

the supercharger is communicated with an air inlet of the gas generator set, and an air outlet of the gas generator set is communicated with an exhaust pipeline; a water temperature sensor is arranged on the gas generator set, and the gas generator set is electrically connected with the set controller; an oxygen sensor is arranged on the exhaust pipeline;

the fuel control ECU is electrically connected with the methane concentration sensor, the fuel throttle valve, the unit controller, the water temperature sensor and the oxygen sensor.

The fuel control system of the biogas generator set further comprises an air filter communicated with the venturi mixer.

Further, the methane concentration sensor is installed before the valve block.

The utility model discloses a profitable technological effect:

the fuel control system can ensure that the biogas engine can be smoothly and automatically started and stably and reliably run in the environment with various methane concentrations; the technical scheme can reduce the investment of personnel and improve the economical efficiency and the reliability of the biogas generator set.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 10-an air inlet pipeline, 11-a methane concentration sensor, 12-a valve bank, 13-a fuel throttle valve, 14-a Venturi mixer, 15-an air filter and 16-a supercharger;

20-a gas generator set, 21-a water temperature sensor, 22-a set controller,

30-exhaust pipe, 31-oxygen sensor;

and 40, fuel control ECU.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, the fuel control system of the biogas generator set comprises an air inlet pipeline 10, a gas generator set 20, an exhaust pipeline 30 and a fuel control ECU40, and is characterized in that: a methane concentration sensor 11, a valve bank 12, a fuel throttle 13, a venturi mixer 14 and a supercharger 16 are sequentially arranged on the air inlet pipeline 10;

the supercharger 16 is communicated with an air inlet of the gas generator set 20, and an air outlet of the gas generator set 20 is communicated with an exhaust pipeline 30; a water temperature sensor 21 is arranged on the gas generator set 20, and the gas generator set 20 is electrically connected with a set controller 22; an oxygen sensor 31 is arranged on the exhaust pipeline 30;

the fuel control ECU40 is electrically connected to the methane concentration sensor 11, the fuel throttle 13, the unit controller 22, the water temperature sensor 21, and the oxygen sensor 31. The fuel control ECU reads an actual methane concentration value of a pipeline in front of the valve group in real time through a methane concentration sensor, reads an actual air-fuel ratio of the gas generator set through an oxygen sensor, and also reads a water temperature value of the gas generator set through a water temperature sensor.

The fuel control system of the biogas generator set further comprises an air filter 15 communicated with the venturi mixer 14.

The methane concentration sensor 11 is mounted before the valve block 12.

In the starting stage of the gas generator set, the fuel control ECU reads a real-time methane concentration value and a water temperature value according to a methane concentration sensor and a water temperature sensor, and gives an optimal fuel throttle opening value at the moment according to a preset fuel throttle opening table and a specific internal logic, so that the unit can be started smoothly. The method comprises the steps of simulating biogas with different methane concentrations in a laboratory, measuring the optimal fuel opening corresponding to the smooth starting of the engine under different methane values, introducing the data into an ECU, and automatically setting the optimal fuel throttle opening according to the received methane concentration value when the engine is started in practical application.

In the unit operation stage, the fuel control ECU reads a real-time methane concentration value and a real-time power value according to a methane concentration sensor and a unit controller, and gives an optimal theoretical air-fuel ratio at the moment according to preset methane concentrations, optimal air-fuel ratio tables under the power values and specific internal logic; and the fuel control ECU reads the actual air-fuel ratio according to the oxygen sensor, gives an instruction to adjust the opening of the fuel throttle valve, and ensures that the actual air-fuel ratio is the same as the theoretical air-fuel ratio. The method comprises the steps of simulating biogas with different methane concentrations in a laboratory, measuring the air-fuel ratio with the best economy and reliability of the engine under different power sections and different biogas concentrations, introducing the data into an ECU, giving the optimal target air-fuel ratio by the ECU according to the real-time value and the real-time power value of the methane concentration when the engine is in actual operation, and automatically adjusting the actual air-fuel ratio to be the same as the theoretical air-fuel ratio according to the instruction of the ECU.

Claims

1. The utility model provides a marsh gas generating set fuel control system, includes air intake duct (10), gas generating set (20), exhaust duct (30) and fuel control ECU (40), characterized by: the methane concentration sensor (11), the valve bank (12), the fuel throttle valve (13), the Venturi mixer (14) and the supercharger (16) are sequentially arranged on the air inlet pipeline (10);

the supercharger (16) is communicated with an air inlet of the gas generator set (20), and an air outlet of the gas generator set (20) is communicated with an exhaust pipeline (30); a water temperature sensor (21) is arranged on the gas generator set (20), and the gas generator set (20) is electrically connected with a set controller (22); an oxygen sensor (31) is arranged on the exhaust pipeline (30);

the fuel control ECU (40) is electrically connected with the methane concentration sensor (11), the fuel throttle valve (13), the unit controller (22), the water temperature sensor (21) and the oxygen sensor (31).

2. The biogas generator set fuel control system of claim 1, wherein: and the air filter (15) is communicated with the Venturi mixer (14).

3. The fuel control system of the biogas generator set according to claim 1 or 2, characterized in that: the methane concentration sensor (11) is arranged in front of the valve group (12).