New nitrogen bubble method fuel vapor generation and mixing device

Abstract

The present invention discloses a novel nitrogen bubble fuel vapor generation and mixing device, comprising an oil storage tank, a steam generator tank, a pressure stabilizing tank, a water tank, a refrigeration compressor, a water pump, a buffer tank, and a nitrogen distribution unit. The oil pump is connected to the oil storage tank for fuel and the fuel steam generator tank via pipelines. The steam generator tank contains a nitrogen bubble spiral coil and a circulating water coil. The water tank is connected to the circulating water coil, and an electric heater is installed in the water channel between the liquid in the water tank and the circulating water coil. The refrigerant in the refrigeration compressor circulation pipeline is connected to the circulating water coil. The buffer tank is connected to the steam generator tank, and the pipeline is equipped with a mixed gas density sensor and a mass flow sensor. The nitrogen distribution unit controls the nitrogen distribution of the steam generation and mixing device. A delivery pipeline leads to the steam generator tank and is connected to the nitrogen bubble spiral coil; another pipeline leads to the buffer tank. The fuel vapor generated by the present invention can be stably transported in the pipeline under normal temperature and pressure.

Description

Technical Field

[0001] The present invention relates to a novel nitrogen bubble method fuel vapor generation and mixing device, in particular to a carbon canister equipped with a light gasoline vehicle for capturing fuel vapor. The device is used to load a mixture of fuel vapor and nitrogen with a constant flow rate into the carbon canister when the carbon canister is tested for gasoline working capacity. Background Art

[0002] Compared to the fifth stage, the National Light Vehicle Emission Standards for Stage VI tighten the Type IV evaporative emission limits and add Type VII refueling emission test requirements. As a key component in gasoline vehicle evaporative emission control technology, the charcoal canister's gasoline handling capacity is a crucial technical indicator that determines the vehicle's evaporative emission control capabilities.

[0003] Because butane is more stable than fuel vapor, there is no problem of easy liquefaction and damage to the internal structure of the charcoal canister. Therefore, the current national mandatory light vehicle inspection standard GB18352.6-2016 "Light-duty Vehicle Pollutant Emission Limits and Measurement Methods (China Phase VI)" cites the test method in HJ / 390-2007 "Technical Requirements for Environmental Protection Products Gasoline Vehicle Fuel Evaporative Pollutant Control System (Device)" and uses butane as the medium to test the butane working capacity of the charcoal canister, but it deviates from the actual use conditions of the charcoal canister. HJ / 390-2007 "Technical Requirements for Environmental Protection Products Gasoline Vehicle Fuel Evaporative Pollutant Control System (Device)" also stipulates a test method for testing the gasoline working capacity of the charcoal canister. This method is a water bath heating method, and the test method requirements are as follows:

[0004] Steam storage device working capacity: Steam storage device working capacity test as follows Figure 1 The test uses a mixture of gasoline or butane and nitrogen.

[0005] Test using gasoline: a) Weigh the vapor storage device; b) Add a sufficient amount of gasoline to the vapor generating device (as shown in Figure 2) and heat it; c) Fill the vapor storage device with gasoline vapor at (52 ± 2)°C at a charging rate of 2.4L / min until it reaches the critical point; d) Weigh the vapor storage device.

[0006] Currently, the main methods for generating fuel vapor on the market are water bath heating and negative pressure vacuuming. However, these two methods have certain drawbacks. The water bath method heats the fuel to a relatively high temperature, and the resulting fuel vapor easily liquefies when it enters a normal temperature pipeline or charcoal canister. The negative pressure method uses negative pressure to lower the fuel's vaporization temperature, but the resulting fuel vapor also easily liquefies when it enters a normal temperature and pressure environment. Furthermore, fuel vapor is primarily affected by changes in fuel temperature during vehicle operation, and the composition of the fuel vapor generated by the negative pressure method differs from that actually generated in a vehicle. Therefore, a fuel vapor generator is urgently needed to address the shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of the present invention is to address the technical defects existing in the prior art and provide a novel nitrogen bubble method fuel vapor generation and mixing device, aiming to avoid the phenomenon that the fuel vapor loaded in the charcoal canister is easily liquefied when the gasoline working capacity test is carried out, so as to overcome the shortcomings of the existing fuel vapor generation devices using the water bath method and the negative pressure method.

[0008] The technical solution adopted to achieve the purpose of the present invention is:

[0009] A novel nitrogen bubble method fuel vapor generation and mixing device includes an oil storage tank, a steam generation tank, a pressure stabilizing tank, a water tank, a refrigeration compressor, a water pump and a nitrogen gas distribution unit;

[0010] The oil storage tank is used to store a fixed amount of fuel. The oil pump is connected to the oil storage tank and the steam generator tank through pipelines and is used to extract the fuel in the oil storage tank and transport it to the steam generator tank. The steam generator tank contains a nitrogen bubble spiral coil and a circulating water coil, and is equipped with a temperature sensor, a pressure sensor, and a liquid level sensor for containing liquid fuel. The bottom of the steam generator tank is provided with an oil drain valve for draining the fuel in the oil storage tank.

[0011] The water tank is in communication with the circulating water coil in the steam generator tank. The liquid in the water tank serves as a medium for heat exchange. The liquid in the water tank circulates in the circulating water circuit using power provided by a water pump. An electric heater is installed in the water circuit between the water tank and the circulating water coil in the steam generator tank to provide heat to the circulating water circuit. The circulating water coil is completely immersed in liquid fuel. The circulating water exchanges heat with the liquid fuel through circulation, thereby controlling the temperature of the liquid fuel in the steam generator tank.

[0012] The circulation pipeline of the refrigeration compressor is connected to the circulating water coil in the steam generating tank through a shell and tube heat exchanger, and the refrigerant medium in the circulation pipeline of the refrigeration compressor and the heat exchange medium in the circulating water coil in the steam generating tank exchange heat through the shell and tube heat exchanger;

[0013] The pressure stabilizing tank is connected to the steam generating tank and a mixed gas density sensor and a mixed gas mass flow sensor are installed on the connecting pipeline;

[0014] The nitrogen distribution unit is used to control the nitrogen distribution of the entire steam generation and mixing device. It is divided into two delivery pipelines. One delivery pipeline leads to the steam generation tank and is connected to the nitrogen bubble spiral coil to form a nitrogen bubble generation pipeline; the other pipeline leads to the pressure stabilizing tank to increase the nitrogen ratio in the pressure stabilizing tank.

[0015] Wherein, an oil delivery valve is provided on the pipeline connecting the oil storage tank and the steam generating tank, and the oil delivery valve is used to control the switch of the fuel inlet of the steam generating tank.

[0016] Among them, an oil recovery tank is provided, which is connected to the oil drain valve at the bottom of the steam generating tank through a pipeline and is used to recover the waste oil in the steam generating tank.

[0017] Wherein, each of the two delivery pipelines of the nitrogen distribution unit is provided with a volume flow sensor for measuring the nitrogen volume flow in the pipeline and transmitting the nitrogen volume flow signal to the control system to form a feedback regulation signal.

[0018] The control system includes a PLC controller, an analog input and output module, a digital output module and control software, which collects temperature, pressure and liquid level information in the steam generator tank and pressure information in the pressure regulating tank;

[0019] The control system controls the nitrogen distribution unit to deliver a predetermined flow of nitrogen into the surge tank based on the volume ratio of fuel vapor and nitrogen at the front end of the surge tank inlet, thereby controlling the volume ratio of fuel vapor and nitrogen in the steam generating tank to be 1:1.

[0020] Wherein, the pressure stabilizing tank is provided with a pressure releaser and a pressure sensor.

[0021] Wherein, the shell and tube heat exchanger is connected to the water tank.

[0022] Among them, the oil change method in the steam generator tank is to change the oil according to the number of cycles. The number of cycles is set by the control system. After the number of cycles is reached, the control system automatically discharges the waste oil into the recovery tank, and fresh fuel is pumped from the tank into the generator tank.

[0023] The nitrogen bubble spiral coil is placed at the bottom of the steam generator tank and is completely immersed in the liquid fuel. A large number of bubble holes are provided on the spiral pipe. Nitrogen can enter the liquid fuel through the bubble holes, generating strong disturbance in the liquid fuel, so that the nitrogen is fully mixed with the fuel in the generator tank, bringing out a large amount of fuel vapor. The nitrogen flows through the liquid fuel to the fuel-free area above the steam generator tank, generating a mixture of fuel vapor and nitrogen.

[0024] Among them, the temperature sensor is used to monitor the fuel temperature in the steam generating tank and transmit the temperature signal to the control system for the control system to make feedback adjustment; the pressure sensor is used to monitor the gas pressure in the steam generating tank and transmit the pressure signal to the control system for the control system to make feedback adjustment; the liquid level sensor is a magnetic flap type liquid level gauge, which is used to monitor the liquid level in the steam generating tank and transmit the liquid level signal to the control system for the control system to make feedback adjustment. When the fuel in the steam generating tank is emptied, the liquid level sensor transmits a signal to the control system, and the control system controls the opening of the oil delivery valve and the oil pump to replenish oil into the steam generating tank.

[0025] The device of the present invention uses a nitrogen bubble method. Under normal temperature and pressure conditions, the fuel vapor generated by the nitrogen bubbles can be stably transported in a pipeline under normal temperature and pressure conditions. After entering the charcoal canister, there is no problem of fuel vapor liquefaction, destruction of the activity of the carbon powder in the charcoal canister, and reduction of the gasoline working capacity of the charcoal canister. The device of the present invention overcomes the problem of easy liquefaction of the fuel vapor generated by the existing water bath method and negative pressure fuel vapor generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a steam storage device working capacity test device in the prior art.

[0027] Figure 2 It is a schematic diagram of a steam generating device in the prior art.

[0028] Figure 3 It is a structural schematic diagram of the novel nitrogen bubble method fuel vapor generation and mixing device of the present invention.

[0029] Description of reference numerals:

[0030] 1. Oil storage tank; 2. Oil pump; 3. Oil transfer valve; 4. Steam generator tank; 5. Circulating water coil; 6. Nitrogen bubble spiral coil; 7. Liquid level sensor; 8. Pressure sensor; 9. Temperature sensor; 10. Oil drain valve; 11. Oil recovery tank; 12. Pressure regulator tank; 13. Pressure release device; 14. Nitrogen distribution unit; 15. First nitrogen volume flow sensor; 16. Second nitrogen volume flow sensor; 17. Mixed gas density sensor; 18. Mixed gas mass flow sensor; 19. Electric heater; 20. Water pump; 21. Water tank; 22. Shell and tube heat exchanger; 23. Refrigeration compressor; 24. Control system; 25. Pressure sensor. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 3 As shown, the novel nitrogen bubble method fuel vapor generation and mixing device according to the embodiment of the present invention includes an oil storage tank, an oil pump, an oil delivery valve, a steam generation tank, a circulating water coil, a nitrogen bubble spiral coil, a liquid level sensor, a pressure sensor, a temperature sensor, an oil drain valve, an oil recovery tank, a pressure regulating tank, a nitrogen gas distribution unit, a control system, a mixed gas density sensor, a mixed gas mass flow sensor, two nitrogen volume flow sensors, a water tank, a refrigeration compressor, a pressure releaser, an electric heater, a water tank, and a water pump.

[0033] The oil tank is used to store a fixed amount of fuel. The oil pump is connected to the oil tank and the steam generator tank via pipelines, and is used to pump fuel from the oil tank and transfer it to the steam generator tank. A fuel delivery valve is installed on the pipeline connecting the oil tank and the steam generator tank, and is used to control the fuel inlet of the steam generator tank.

[0034] The steam generator is a tank body containing a nitrogen bubble spiral coil and a circulating water coil, equipped with a temperature sensor, a pressure sensor, and a liquid level sensor. The steam generator can hold liquid fuel and has a valve at the bottom for draining the fuel from the device.

[0035] The temperature sensor is used to monitor the fuel temperature in the steam generator tank and transmit a temperature signal to the control system for the control system to make feedback adjustments.

[0036] The pressure sensor is used to monitor the gas pressure in the steam generating tank and transmit a pressure signal to the control system for the control system to make feedback adjustments.

[0037] The liquid level sensor is a magnetic flap type liquid level gauge, which is used to monitor the liquid level in the steam generator tank and transmit a liquid level signal to the control system for the control system to make feedback adjustments. When the fuel in the steam generator tank is emptied, the liquid level sensor transmits a signal to the control system, and the control system controls the opening of the oil delivery valve and the oil pump to replenish oil in the steam generator tank.

[0038] The nitrogen bubble spiral coil is placed at the bottom of the steam generator tank and is completely immersed in the liquid fuel. A large number of bubble holes are provided on the pipeline. Nitrogen can enter the liquid fuel through the bubble holes, generating strong disturbance in the liquid fuel, so that the nitrogen and the fuel in the generator tank are fully mixed, bringing out a large amount of fuel vapor. The nitrogen flows through the liquid fuel to the fuel-free area above the steam generator tank, generating a mixture of fuel vapor and nitrogen.

[0039] The circulating water coil is completely immersed in the liquid fuel. The circulating water exchanges heat with the liquid fuel by circulating in the pipeline, thereby controlling the temperature of the liquid fuel in the steam generating tank.

[0040] The water tank is connected to the circulating water coil within the steam generator tank. The liquid within the water tank serves as the heat exchange medium, and is circulated within the circulating water circuit by the power provided by a water pump. An electric heater is installed in the water circuit between the water tank and the circulating water coil within the steam generator tank to provide heat to the circulating water circuit.

[0041] The refrigeration compressor is used to provide cooling capacity. The refrigerant medium in the refrigeration compressor's circulation pipeline exchanges heat with the heat exchange medium in the circulating water coil in the steam generator tank via a shell-and-tube heat exchanger. The refrigeration compressor and electric heater respectively provide cooling capacity and heat to the circulating water in the circulating water coil. Heat exchange between the circulating water coil and the liquid fuel in the steam generator tank is used to control the temperature of the liquid fuel in the steam generator tank.

[0042] The oil recovery tank is connected to the oil drain valve at the bottom of the steam generator tank via a pipeline to recover the waste oil in the steam generator tank. The oil drain valve, located on the pipeline between the oil recovery tank and the steam generator tank, is used to control the discharge of waste oil from the steam generator tank. After the carbon canister test reaches a set number of times, the control system controls the oil drain valve to open, draining the fuel from the steam generator tank.

[0043] The pressure-surge tank is connected to the steam generating tank through a pipeline. The nitrogen and fuel vapor mixture generated in the steam generating tank flows into the pressure-surge tank through the pipeline. A pressure releaser is installed above the pressure-surge tank, and a pressure sensor is installed inside. When the pressure exceeds the set value, the pressure releaser works to discharge part of the fuel vapor and nitrogen mixture to reduce the pressure in the pressure-surge tank, ensuring that the mixture is not affected by the pressure and is liquefied.

[0044] A mixture density sensor and a mixture mass flow sensor are installed on the pipeline connecting the pressure stabilizing tank and the steam generating tank, which are used to measure the density and mass flow of the fuel vapor and nitrogen mixture in the pipeline.

[0045] The nitrogen distribution unit controls nitrogen distribution throughout the steam generation and mixing device. It consists of two delivery pipelines: one that connects to the nitrogen bubble generation pipeline within the steam generator tank; the other that connects to the surge tank, increasing the nitrogen content within the tank. Each of the two delivery pipelines is equipped with a volume flow sensor to measure the nitrogen volume flow within the pipeline and transmit the nitrogen volume flow signal to the control system for feedback regulation.

[0046] The control system, which includes a PLC controller, analog input and output modules, digital output modules, and control software, collects temperature, pressure, and liquid level information within the steam generator tank, as well as pressure information within the surge tank, and controls other equipment to provide timely feedback and adjustments. The control system determines the volume ratio of fuel vapor to nitrogen at the surge tank inlet. It then controls the nitrogen distribution unit to deliver a constant flow of nitrogen into the surge tank, maintaining a 1:1 ratio within the generator tank.

[0047] The oil changing method in the steam generator tank is to change the oil according to the number of cycles. The number of cycles can be set by the control system. After the number of cycles is reached, the control system automatically discharges the waste oil into the recovery tank, and fresh fuel is pumped from the tank into the generator tank.

[0048] According to the canister gasoline working capacity test process, the device of the present invention operates as follows:

[0049] S1. The control system 24 issues a command, the oil delivery valve 3 opens, the oil pump 2 starts working, and 10 liters of liquid fuel are delivered from the oil storage tank 1 to the steam generator tank 4 with a volume of 20 liters. After the delivery of 10 liters of fuel is completed, the oil pump 2 stops working and the oil delivery valve 3 is closed.

[0050] S2. The control system 24 sets the fuel temperature in the steam generator tank 4 to 23°C. Driven by the water pump 20, the heat exchange medium flows from the water tank 21 through the electric heater 19 in the pipeline and enters the circulating water coil 5. Then, it returns to the water tank 21 through the shell and tube heat exchanger 22 in the pipeline, forming a circulating water circuit.

[0051] S3. Temperature sensor 9 measures the actual temperature T inside the steam generator tank. When T is less than 23°C, electric heater 19 operates to provide heat to the circulating water circuit. When T is greater than 23°C, refrigeration compressor 23 operates, and the refrigerant in refrigeration compressor 23 exchanges heat with the circulating water circuit of water tank 21 via shell-and-tube heat exchanger 22, providing cooling. This is used to control the temperature inside the steam generator tank.

[0052] S4. The control system 24 issues a command, and nitrogen flows from the nitrogen distribution unit 14 through the nitrogen volume flow sensor 15 in the pipeline to the steam generator tank 4, and the volume flow rate V1N2 of the nitrogen is measured.

[0053] S5. The pressure in steam generator tank 4 and surge tank 12 is stabilized at 220 kPa. When the pressure measured by pressure sensor 8 and pressure sensor 25 is less than 220 kPa, control system 24 controls nitrogen distribution unit 14 to increase the nitrogen flow rate. When the pressure measured by pressure sensor 8 and pressure sensor 25 is greater than 220 kPa, control system 24 controls nitrogen distribution unit 14 to reduce the nitrogen flow rate.

[0054] S6. Nitrogen enters the liquid fuel through the bubble holes on the nitrogen bubble spiral coil 6 in the steam generator tank 4, forming nitrogen bubbles. The nitrogen bubbles cause violent disturbances in the liquid fuel and carry away the fuel vapor, forming a mixture of fuel vapor and nitrogen in the liquid fuel-free space above the steam generator tank 4.

[0055] S7. The mixture of fuel vapor and nitrogen flows through the mixture density sensor 17 and the mixture mass flow sensor 18, and the density ρ and mass flow rate Mf of the mixture are measured. The control system calculates the nitrogen that should be added to the mixture using the formula Mf / ρ - 2V1N2.

[0056] S8. Nitrogen with a volume flow rate of Mf mixed / ρ-2V1N2 flows from the nitrogen distribution unit 14, through the second nitrogen distribution pipeline, and into the surge tank 12 through the nitrogen volume flow sensor 15. A mixture of nitrogen and fuel vapor with a volume ratio of 1:1 is formed in the surge tank for gasoline working capacity testing.

[0057] S9. The surge tank is equipped with a pressure sensor 25 and a pressure releaser 13 on the top. When the pressure inside the surge tank exceeds 300 kPa, the pressure releaser operates, and part of the mixture of fuel vapor and nitrogen flows out of the pressure releaser to ensure the pressure inside the surge tank is stable and the fuel vapor does not liquefy.

[0058] S10. A mixture of nitrogen and fuel vapor in a volume ratio of 1:1 flows from the steam generator tank 4 into the subsequent pipeline for testing the gasoline working capacity of the charcoal canister.

[0059] S11. After steam generator tank 4 completes four cycles of gasoline operating capacity testing, control system 24 controls drain valve 10 to open. After the fuel in the tank is completely drained, level sensor 7 measures the level signal and transmits it to control system 24. Control system 24 then restarts the oil delivery process in step S1.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0061] The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalents of the claims are therefore intended to be embraced therein.

[0062] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A new type of nitrogen bubble method fuel vapor generation and mixing device, characterized by: It is used to generate fuel vapor under normal temperature and pressure conditions by using nitrogen bubbles, and transport it in a stable pipeline under normal temperature and pressure conditions; it includes an oil storage tank, a steam generating tank, a pressure stabilizing tank, a water tank, a refrigeration compressor, a water pump, and a nitrogen distribution unit; The oil storage tank is used to store a fixed amount of fuel. The oil pump is connected to the oil storage tank and the steam generator tank through pipelines and is used to extract the fuel in the oil storage tank and transport it to the steam generator tank. The steam generator tank contains a nitrogen bubble spiral coil and a circulating water coil, and is equipped with a temperature sensor, a pressure sensor, and a liquid level sensor for containing liquid fuel. The bottom of the steam generator tank is provided with an oil drain valve for draining the fuel in the oil storage tank. The water tank is in communication with the circulating water coil in the steam generator tank. The liquid in the water tank serves as a medium for heat exchange. The liquid in the water tank circulates in the circulating water circuit using power provided by a water pump. An electric heater is installed in the water circuit between the water tank and the circulating water coil in the steam generator tank to provide heat to the circulating water circuit. The circulating water coil is completely immersed in liquid fuel. The circulating water exchanges heat with the liquid fuel through circulation, thereby controlling the temperature of the liquid fuel in the steam generator tank. The circulation pipeline of the refrigeration compressor is connected to the circulating water coil in the steam generating tank through a shell and tube heat exchanger, and the refrigerant medium in the circulation pipeline of the refrigeration compressor and the heat exchange medium in the circulating water coil in the steam generating tank exchange heat through the shell and tube heat exchanger; The pressure stabilizing tank is connected to the steam generating tank and a mixed gas density sensor and a mixed gas mass flow sensor are installed on the connecting pipeline; The nitrogen distribution unit is used to control the nitrogen distribution of the entire steam generation and mixing device. It is divided into two delivery pipelines. One delivery pipeline leads to the steam generation tank and is connected to the nitrogen bubble spiral coil to form a nitrogen bubble generation pipeline; the other pipeline leads to the pressure stabilizing tank to increase the nitrogen ratio in the pressure stabilizing tank. The control system controls the nitrogen distribution unit to deliver a predetermined flow of nitrogen into the surge tank based on the volume ratio of fuel vapor and nitrogen at the front end of the surge tank inlet, and controls the volume ratio of fuel vapor and nitrogen in the steam generator tank to 1:

1.

2. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: An oil delivery valve is provided on the pipeline connecting the oil storage tank and the steam generating tank, and the oil delivery valve is used to control the switch of the fuel inlet of the steam generating tank.

3. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: An oil recovery tank is provided, which is connected to the oil drain valve at the bottom of the steam generating tank through a pipeline and is used to recover the waste oil in the steam generating tank.

4. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: A volume flow sensor is provided on each of the two delivery pipelines of the nitrogen distribution unit to measure the nitrogen volume flow in the pipeline and transmit the nitrogen volume flow signal to the control system to form a feedback regulation signal.

5. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: The control system includes a PLC controller, an analog input and output module, a digital output module and control software, and collects temperature, pressure and liquid level information in the steam generating tank and pressure information in the pressure regulating tank.

6. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: The pressure stabilizing tank is provided with a pressure releaser and a pressure sensor.

7. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: The shell and tube heat exchanger is connected to the water tank.

8. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: The oil changing method in the steam generator tank is to change the oil according to the number of cycles. The number of cycles is set by the control system. After the number of cycles is reached, the control system automatically discharges the waste oil into the recovery tank, and fresh fuel is pumped from the tank into the generator tank.

9. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: The nitrogen bubble spiral coil is placed at the bottom of the steam generator tank and is completely immersed in the liquid fuel. A large number of bubble holes are provided on the spiral pipe. Nitrogen can enter the liquid fuel through the bubble holes, generating strong disturbance in the liquid fuel, so that the nitrogen and the fuel in the generator tank are fully mixed, bringing out a large amount of fuel vapor. The nitrogen flows through the liquid fuel to the fuel-free area above the steam generator tank, generating a mixture of fuel vapor and nitrogen.

10. The novel nitrogen bubble method fuel vapor generation and mixing device according to claim 1 is characterized in that: The temperature sensor is used to monitor the fuel temperature in the steam generating tank and transmit the temperature signal to the control system for the control system to make feedback adjustments; the pressure sensor is used to monitor the gas pressure in the steam generating tank and transmit the pressure signal to the control system for the control system to make feedback adjustments; the liquid level sensor is a magnetic flap type liquid level gauge, which is used to monitor the liquid level in the steam generating tank and transmit the liquid level signal to the control system for the control system to make feedback adjustments. When the fuel in the steam generating tank is emptied, the liquid level sensor transmits a signal to the control system, and the control system controls the opening of the oil delivery valve and the oil pump to replenish oil in the steam generating tank.

Images