Gasification device for hydrogen-doped gasification of light oil

Abstract

The invention relates to the technical field of light oil gasification, in particular to a gasification device for hydrogen-doped gasification of light oil, comprising: a gasification module for mixing and reacting hydrogen and light oil to output gaseous fuel gas; a detection module, comprising a pressure sensor which is arranged in the gasification tank and is used for detecting the pressure in the gasification tank, and a liquid level meter which is arranged in the gasification tank and is used for detecting the liquid level height of light oil, the temperature sensor is arranged in the gasification tank and is used for detecting the temperature in the gasification tank; the flow meter is arranged below the oil drain valve and is used for detecting the discharge flow rate of the waste oil; and the control module is used for determining the liquid level height in the gasification tank according to the fluctuation amplitude of the pressure in the gasification tank, or determining the feeding flow of the light oil according to the average flow velocity of the waste oil and determining the feeding pressure of the hydrogen according to the temperature rise rate in the gasification tank. The operation stability of the gasification device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of light oil gasification, and in particular to a gasification device for light oil mixed with hydrogen for gasification. Background Art

[0002] Currently, traditional energy utilization methods suffer from numerous issues, such as low combustion efficiency and high pollutant emissions, making them difficult to meet the demands of sustainable development. The emergence of light oil-hydrogen gasification technology offers a new approach to addressing these issues. By combining light oil with hydrogen for a gasification reaction, a high-calorific value gas is produced. This not only improves energy efficiency but also significantly reduces pollutant emissions, meeting the dual requirements of environmental protection and energy conservation.

[0003] Most light oil (mainly pentane) gasification equipment on the market has a complex structure and high production cost. In order to improve the gasification or combustion effect of the fuel, different types of gases are usually added to mix with the generated light hydrocarbon gas. However, due to the inconsistent physical properties of the two gases after mixing, they cannot be effectively fused. In addition, the light hydrocarbon gas will re-liquefy when it encounters cold during transportation. To overcome this problem, it is usually necessary to install additional oil return, heating and other devices in the transportation pipeline, but this will increase the complexity of the equipment and operating costs.

[0004] Chinese Patent Publication No.: CN103045307A discloses a pyrolysis gasification method and pyrolysis gasification device for preparing tar-free hydrogen-rich gas, the method comprising the following steps: 1) feeding a carbon-containing solid raw material into an upstream pyrolysis reactor through a feeding device for aerobic pyrolysis to produce pyrolysis gas products and solid products; 2) passing the pyrolysis gas products and solid products produced in step 1) into a downstream tar cracking reactor, removing tar through high-temperature thermal cracking, partial oxidation, and catalytic cracking of pyrolysis semi-coke; at the same time, the pyrolysis semi-coke undergoes partial gasification to obtain pyrolysis gas and pyrolysis semi-coke. It can be seen that the pyrolysis gasification method and pyrolysis gasification device for preparing tar-free hydrogen-rich gas have the problem that the valve stem in the regulating valve of the oil supply pipeline wears out after long-term use, resulting in inaccurate oil flow regulation, unstable pressure inside the gasification tank, and thus reduced operational stability of the gasification device. Summary of the Invention

[0005] To this end, the present invention provides a gasification device for light oil mixed with hydrogen gasification, which is used to overcome the problem in the prior art that the valve stem in the regulating valve of the oil supply pipeline wears out after long-term use, resulting in inaccurate oil flow regulation, unstable pressure inside the gasification tank, and thus reduced operating stability of the gasification device.

[0006] To achieve the above-mentioned purpose, the present invention provides a gasification device for light oil mixed with hydrogen gasification, comprising: a gasification module for mixing hydrogen and light oil to react and output gaseous fuel gas, comprising a gasification unit for providing a gasification site, a light oil delivery unit connected to the gasification unit for inputting light oil, a circulation unit connected to the gasification unit for circulating the mixed oil-gas mixture, and an oil drain unit arranged at the bottom of the gasification unit for discharging waste oil; wherein, the gasification unit comprises a gasification tank, the light oil delivery unit comprises an oil supply pump for providing oil supply power, the circulation unit comprises a circulation pump for providing circulation power, and the oil drain unit comprises a drain pump for regulating the flow rate of the waste oil. an oil valve; a detection module connected to the gasification module, comprising a pressure sensor arranged inside the gasification tank for detecting the pressure inside the gasification tank, a level gauge arranged inside the gasification tank for detecting the liquid level of light oil, a temperature sensor arranged inside the gasification tank for detecting the internal temperature of the gasification tank, and a flow meter arranged below the oil drain valve for detecting the discharge flow rate of waste oil; a control module, respectively connected to the gasification module and the detection module, for determining the liquid level inside the gasification tank according to the fluctuation amplitude of the internal pressure of the gasification tank, or determining the feed flow rate of light oil according to the average flow rate of the waste oil, and determining the feed pressure of hydrogen according to the temperature rise rate inside the gasification tank.

[0007] Furthermore, the control module is used to determine the operating stability of the gasification device according to the fluctuation amplitude of the internal pressure of the gasification tank. If the fluctuation amplitude of the internal pressure of the gasification tank is greater than a preset first fluctuation amplitude, it is determined that the operating stability of the gasification device does not meet the requirements.

[0008] Furthermore, the control module is used to preliminarily determine that the operating reliability of the gasification device does not meet the requirements when the fluctuation amplitude of the internal pressure of the gasification tank is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, and determine whether the operating reliability of the gasification device meets the requirements based on the average flow rate of the waste oil.

[0009] Furthermore, the control module is used to reduce the liquid level height in the vaporizer when the fluctuation amplitude of the internal pressure of the vaporizer is greater than the preset second fluctuation amplitude;

[0010] The reduction range of the liquid level height in the vaporization tank is determined by the difference between the fluctuation range of the internal pressure of the vaporization tank and a preset second fluctuation range.

[0011] Furthermore, the control module is used to determine the operational reliability of the gasification device according to the average flow rate of the waste oil. If the average flow rate of the waste oil is less than or equal to a preset second flow rate, it is determined that the operational reliability of the gasification device does not meet the requirements.

[0012] Furthermore, the control module is used to preliminarily determine that the internal environmental stability of the gasification device does not meet the requirements when the average flow rate of the waste oil is less than or equal to a preset first flow rate, and to determine whether the internal environmental stability of the gasification device meets the requirements based on the temperature rise rate in the gasification tank.

[0013] Furthermore, the control module is configured to reduce the feed flow rate of the light oil when the average flow rate of the waste oil is greater than the preset first flow rate and less than or equal to the preset second flow rate.

[0014] Furthermore, the reduction range of the feed flow rate of the light oil is determined by the difference between the average flow rate of the waste oil and a preset first flow rate.

[0015] Furthermore, the control module is used to determine the internal environmental stability of the gasification device according to the temperature rise rate in the gasification tank. If the temperature rise rate in the gasification tank is less than the preset rise rate, it is determined that the internal environmental stability of the gasification device does not meet the requirements, and the feed pressure of hydrogen is increased.

[0016] Furthermore, the increase range of the hydrogen feed pressure is determined by the difference between a preset increase rate and a temperature increase rate in the vaporization tank.

[0017] Compared with the prior art, the beneficial effect of the present invention is that the device of the present invention determines the liquid level height in the gasifier according to the fluctuation amplitude of the internal pressure of the gasifier by setting a gasification module, a detection module and a control module. Since the valve stem in the regulating valve of the oil supply pipeline is worn after long-term use, the movement becomes inflexible, resulting in inaccurate oil supply flow regulation, resulting in unstable amount of light oil entering the reactor, and thus causing unstable pressure inside the gasifier. By reducing the liquid level height in the gasifier, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations, and alleviating the amplitude of pressure fluctuations to a certain extent. The feed flow rate of light oil is determined according to the average flow rate of the waste oil. Since the light oil raw material may contain solid impurities, as the light oil enters the reactor, the flow rate of light oil is increased. When it enters the gasification tank, it may gradually be deposited at the oil drain port, causing partial blockage of the oil drain port pipeline. By reducing the feed flow rate of light oil, the total amount of impurities entering the gasification tank per unit time can be reduced, and the deposition rate of impurities at the oil drain port can be reduced, which helps to alleviate the blockage of the oil drain port. The feed pressure of hydrogen is determined according to the temperature rise rate in the gasification tank. Due to long-term use, the resistance wire in the heater ages, resulting in occasional short circuits, which causes the temperature to fail to reach the predetermined temperature. By increasing the feed pressure of hydrogen, the concentration of hydrogen in the gasification tank can be increased, and the contact with the light oil is more complete, which accelerates the gasification reaction rate, thereby generating more heat, helping to increase the temperature rise rate in the gasification tank and improving the operating stability of the gasification device.

[0018] Furthermore, the device described in the present invention determines the liquid level height in the vaporizer by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Since the valve stem in the regulating valve of the oil supply pipeline wears out after long-term use, resulting in inflexible movement, the oil supply flow rate regulation is not accurate, and the amount of light oil entering the reactor is unstable, which leads to unstable pressure inside the vaporizer. By reducing the liquid level height in the vaporizer, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations, alleviating the amplitude of pressure fluctuations to a certain extent, and further improving the operating stability of the gasification device.

[0019] Furthermore, the device described in the present invention determines the feed flow rate of light oil by setting a preset first flow rate and a preset second flow rate. Since the light oil raw material may contain solid impurities, as the light oil enters the gasification tank, it may gradually be deposited at the oil drain port, causing partial blockage of the pipeline at the oil drain port. By reducing the feed flow rate of light oil, the total amount of impurities entering the gasification tank per unit time can be reduced, and the deposition rate of impurities at the oil drain port can be reduced, which helps to alleviate the blockage of the oil drain port and further improves the operating stability of the gasification device.

[0020] Furthermore, the device described in the present invention determines the feed pressure of hydrogen by setting a preset increase rate. Due to long-term use, the resistance wire in the heater ages, resulting in occasional short circuits, which causes the temperature to fail to reach the predetermined temperature. By increasing the feed pressure of hydrogen, the concentration of hydrogen in the gasification tank can be increased, and the contact with the light oil is more complete, which accelerates the gasification reaction rate, thereby generating more heat, helping to increase the temperature increase rate in the gasification tank, and further improving the operating stability of the gasification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a gasification device for light oil mixed with hydrogen gasification according to an embodiment of the present invention;

[0022] Figure 2 This is a block diagram of the overall structure of a gasification device for light oil mixed with hydrogen gasification according to an embodiment of the present invention;

[0023] Figure 3 This is a logic flow chart of a process for determining the liquid level height in a gasification tank of a gasification device for light oil mixed with hydrogen gasification according to an embodiment of the present invention;

[0024] Figure 4 This is a logic flow chart of a process for determining a feed flow rate of light oil in a gasification device for light oil hydrogenation according to an embodiment of the present invention;

[0025] The figures are marked as follows: 1-gasification tank, 2-temperature sensor, 3-gas delivery pipeline, 4-pressure sensor, 5-pressure gauge, 6-gas discharge pipeline, 7-air release valve, 8-safety valve, 9-circulation pipeline, 10-liquid level gauge, 11-electric heater, 12-circulation pump, 13-mesh air outlet pipe, 14-oil drain valve, 15-flow meter, 16-oil drain port, 17-oil supply pump, 18-oil pipeline, 19-bracket. DETAILED DESCRIPTION

[0026] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] See also Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 , which are respectively a schematic diagram of the overall structure of a gasification device for hydrogenating light oil, a block diagram of the overall structure, a logic flow chart of the process of determining the liquid level height in the gasification tank, and a logic flow chart of the process of determining the feed flow rate of light oil according to an embodiment of the present invention. A gasification device for hydrogenating light oil according to the present invention comprises:

[0031] A gasification module, for mixing hydrogen and light oil to react and output gaseous fuel gas, comprising a gasification unit for providing a gasification site, a light oil delivery unit connected to the gasification unit for inputting light oil, a circulation unit connected to the gasification unit for circulating the mixed oil-gas mixture, and an oil drain unit disposed at the bottom of the gasification unit for discharging waste oil;

[0032] The gasification unit includes a gasification tank 1, the light oil delivery unit includes an oil supply pump 17 for providing oil supply power, the circulation unit includes a circulation pump 12 for providing circulation power, and the oil drain unit includes an oil drain valve 14 for adjusting the flow of the waste oil.

[0033] a detection module connected to the gasification module, comprising a pressure sensor 4 disposed inside the gasification tank 1 for detecting the pressure inside the gasification tank 1, a level gauge 10 disposed inside the gasification tank 1 for detecting the liquid level of the light oil, a temperature sensor 2 disposed inside the gasification tank 1 for detecting the internal temperature of the gasification tank 1, and a flow meter 15 disposed below the oil drain valve 14 for detecting the discharge flow rate of the waste oil;

[0034] The control module is connected to the gasification module and the detection module respectively, and is used to determine the liquid level height in the gasification tank 1 according to the fluctuation amplitude of the internal pressure of the gasification tank 1, or to determine the feed flow rate of the light oil according to the average flow rate of the waste oil, and to determine the feed pressure of the hydrogen according to the temperature increase rate in the gasification tank 1.

[0035] Specifically, the gasification unit further includes a bracket 19 connected to the gasification tank 1 for supporting the gasification tank.

[0036] Specifically, the light oil delivery unit further includes an oil delivery pipeline 18 connected to the vaporization tank 1 for delivering light oil.

[0037] Specifically, the cycle unit also includes:

[0038] a circulation pipe 9 connected to the gasification tank 1 for conveying the oil-gas mixture;

[0039] The electric heater 11 is connected to the circulation pipe 9 and heats the oil-gas mixture to generate a low-frequency resonant cavitation effect in the gasification tank 1 .

[0040] Specifically, the oil drain unit further includes an oil drain port 16 connected to the vaporization tank 1 for discharging waste oil.

[0041] Specifically, the gasification module also includes:

[0042] A gas delivery pipeline 3, connected to the gasification tank 1, for delivering hydrogen;

[0043] a meshed gas outlet pipe 13 connected to the gas delivery pipeline 3 for discharging hydrogen into the gasification tank 1;

[0044] A gas discharge pipeline 6 is provided at the top of the gasification tank 1 for discharging gaseous fuel gas;

[0045] a pressure gauge 5 connected to the vaporization tank 1 and used to display the internal pressure of the vaporization tank 1;

[0046] An air release valve 7, which is connected to the gasification tank 1 and is used to remove the air in the gasification tank 1 in the early stage;

[0047] The safety valve 8 is connected to the gasification tank 1 and is used to provide protection when the pressure inside the gasification tank 1 exceeds the pressure.

[0048] In practice, the device of the present invention determines the liquid level height in the gasifier 1 according to the fluctuation amplitude of the internal pressure of the gasifier 1 by setting a gasification module, a detection module and a control module. Since the valve stem in the regulating valve of the oil supply pipeline is worn after long-term use, the movement becomes inflexible, resulting in inaccurate oil supply flow regulation, resulting in unstable amount of light oil entering the reactor, and thus causing unstable pressure inside the gasifier 1. By increasing the liquid level height in the gasifier 1, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations, and alleviating the amplitude of pressure fluctuations to a certain extent. The feed flow rate of light oil is determined according to the average flow rate of the waste oil. Since the light oil raw material may contain solid impurities, as the light oil enters the gasifier 1, it may It will gradually deposit at the oil drain port 16, causing the pipeline of the oil drain port 16 to be partially blocked. By increasing the feed flow rate of light oil, the total amount of impurities entering the gasifier 1 per unit time can be reduced, and the deposition rate of impurities at the oil drain port can be reduced, which helps to alleviate the blockage of the oil drain port. The feed pressure of hydrogen is determined according to the temperature rise rate in the gasifier 1. Due to long-term use, the resistance wire in the heater ages, resulting in occasional short circuits, which causes the temperature to fail to reach the predetermined temperature. By increasing the feed pressure of hydrogen, the concentration of hydrogen in the gasifier can be increased, and the contact with the light oil is more complete, which accelerates the gasification reaction rate, thereby generating more heat, helping to increase the temperature rise rate in the gasifier and improving the operating stability of the gasifier.

[0049] Specifically, the control module is used to obtain the pressure inside the gasification tank 1 in a single cycle and calculate the fluctuation amplitude of the pressure inside the gasification tank 1. If the fluctuation amplitude of the pressure inside the gasification tank 1 is greater than the preset first fluctuation amplitude, it is determined that the operating stability of the gasification device does not meet the requirements.

[0050] Specifically, the control module is used to preliminarily determine that the operating reliability of the gasification device does not meet the requirements when the fluctuation amplitude of the internal pressure of the gasification tank 1 is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, and determine whether the operating reliability of the gasification device meets the requirements based on the average flow rate of the waste oil.

[0051] It can be understood that the three intervals divided by the preset first fluctuation amplitude and the preset second fluctuation amplitude correspond to three situations respectively:

[0052] The first interval is when the fluctuation amplitude of the internal pressure of the gasification tank 1 is less than or equal to the preset first fluctuation amplitude, corresponding to the situation that: it is determined that the operation stability of the gasification device meets the requirements;

[0053] The second interval is when the fluctuation amplitude of the internal pressure of the vaporizer 1 is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude. This corresponds to the following situation: since the light oil feedstock may contain solid impurities, as the light oil enters the vaporizer 1, they may gradually deposit at the oil drain port 16, causing the pipe of the oil drain port 16 to be partially blocked;

[0054] The third interval is when the fluctuation amplitude of the internal pressure of the vaporizer 1 is greater than the preset second fluctuation amplitude. The corresponding situation is: the valve stem in the regulating valve of the oil supply pipeline is worn after long-term use, resulting in inflexible movement, resulting in inaccurate oil supply flow regulation, resulting in unstable amount of light oil entering the reactor, and thus causing unstable pressure inside the vaporizer 1.

[0055] In practice, the preset first fluctuation amplitude is generally selected in the range of [0.1MPa, 0.3MPa], and the preset second fluctuation amplitude is generally selected in the range of [0.4MPa, 0.6MPa].

[0056] Preferably, the preferred embodiment of the preset first fluctuation amplitude is 0.2 MPa, and the preferred embodiment of the preset second fluctuation amplitude is 0.5 MPa.

[0057] Specifically, the fluctuation amplitude of the internal pressure of the vaporization tank 1 is the difference between the maximum pressure and the minimum pressure inside the vaporization tank 1 in a single cycle.

[0058] During implementation, the device of the present invention determines the operating stability of the gasification device by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude, thereby reducing the impact of the reduced operating accuracy of the gasification device due to inaccurate determination of the operating stability of the gasification device, and further improving the operating stability of the gasification device.

[0059] Specifically, the control module is used to reduce the liquid level height in the vaporization tank 1 when the fluctuation amplitude of the internal pressure of the vaporization tank 1 is greater than the preset second fluctuation amplitude;

[0060] The reduction range of the liquid level height in the vaporization tank 1 is determined by the difference between the fluctuation range of the internal pressure of the vaporization tank 1 and a preset second fluctuation range.

[0061] Specifically, when the difference between the fluctuation amplitude of the internal pressure of the vaporizer 1 and the preset second fluctuation amplitude is within 0.1 MPa, the liquid level height in the vaporizer 1 is reduced to 0.95 times the original value; when the difference between the fluctuation amplitude of the internal pressure of the vaporizer 1 and the preset second fluctuation amplitude exceeds 0.1 MPa, on the basis of being reduced to 0.95 times the original value, the liquid level height in the vaporizer 1 is reduced by 0.1 m for every 0.05 MPa that exceeds the original value. For example, if the difference between the fluctuation amplitude of the internal pressure of the vaporizer 1 and the preset second fluctuation amplitude is 0.2 MPa, the current liquid level height in the vaporizer 1 is 2 m, and the reduced liquid level height in the vaporizer 1 is 2×0.95-0.1×2=1.7 m.

[0062] During implementation, the device of the present invention determines the liquid level height in the gasifier 1 by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Since the valve stem in the regulating valve of the oil supply pipeline is worn after long-term use, the movement becomes inflexible, resulting in inaccurate oil supply flow regulation, and the amount of light oil entering the reactor is unstable, which leads to unstable pressure inside the gasifier 1. By increasing the liquid level height in the gasifier 1, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations, alleviating the amplitude of pressure fluctuations to a certain extent, and further improving the operating stability of the gasification device.

[0063] Specifically, the control module is used to obtain the flow rate of the waste oil in several oil drainage cycles and calculate the average flow rate of the waste oil. If the average flow rate of the waste oil is less than or equal to a preset second flow rate, it is determined that the operating reliability of the gasification device does not meet the requirements.

[0064] Specifically, the control module is used to preliminarily determine that the internal environmental stability of the gasification device does not meet the requirements when the average flow rate of the waste oil is less than or equal to the preset first flow rate, and determine whether the internal environmental stability of the gasification device meets the requirements based on the temperature rise rate in the gasification tank 1.

[0065] It can be understood that the three intervals divided by the preset first flow rate and the preset second flow rate correspond to three situations respectively:

[0066] The first interval is when the average flow rate of the waste oil is less than or equal to the preset first flow rate. This corresponds to the following situation: due to long-term use, the resistance wire in the heater ages, resulting in occasional short circuits, which causes the temperature to fail to reach the preset temperature.

[0067] The second interval is when the average flow rate of the waste oil is greater than the preset first flow rate and less than or equal to the preset second flow rate. This corresponds to the following situation: since the light oil feedstock may contain solid impurities, as the light oil enters the vaporizer 1, they may gradually deposit at the oil drain port 16, causing the pipe of the oil drain port 16 to be partially blocked;

[0068] The third interval is when the average flow rate of the waste oil is greater than the preset second flow rate, and the corresponding situation is: it is determined that the operation reliability of the gasification device meets the requirements.

[0069] In practice, the preset first flow velocity is generally selected from the range of [0.5 m / s, 1.5 m / s], and the preset second flow velocity is generally selected from the range of [1.6 m / s, 2.6 m / s].

[0070] Preferably, the preferred embodiment of the preset first flow velocity is 1 m / s, and the preferred embodiment of the preset second flow velocity is 2 m / s.

[0071] Specifically, the average flow rate of the waste oil is the ratio of the total flow rate of the waste oil in a number of oil drainage cycles to the number of oil drainage cycles.

[0072] During implementation, the device of the present invention determines the operational reliability of the gasification device by setting a preset first flow rate and a preset second flow rate, thereby reducing the impact of the decreased operational stability of the gasification device due to inaccurate determination of the operational reliability of the gasification device, and further improving the operational stability of the gasification device.

[0073] Specifically, the control module is configured to reduce the feed flow rate of the light oil when the average flow rate of the waste oil is greater than the preset first flow rate and less than or equal to the preset second flow rate.

[0074] Specifically, the reduction range of the feed flow rate of the light oil is determined by the difference between the average flow rate of the waste oil and the preset first flow rate.

[0075] Specifically, when the difference between the average flow rate of the waste oil and the preset first flow rate is within 1m / s, the feed flow rate of the light oil is reduced to 0.9 times the original value; when the difference between the average flow rate of the waste oil and the preset first flow rate exceeds 1m / s, on the basis of being reduced to 0.9 times the original value, the feed flow rate of the light oil is reduced by 0.5h for every 0.5m / s exceeding the preset first flow rate. 3 / h, for example, the difference between the average flow rate of waste oil and the preset first flow rate is 2m / s, and the current feed flow rate of light oil is 3m 3 / h, the reduced light oil feed flow rate is 3×0.9-0.5×2=1.7m 3 / h.

[0076] During implementation, the device of the present invention determines the feed flow rate of light oil by setting a preset first flow rate and a preset second flow rate. Since the light oil raw material may contain solid impurities, as the light oil enters the gasification tank 1, it may gradually be deposited at the oil drain port 16, resulting in partial blockage of the pipeline of the oil drain port 16. By increasing the feed flow rate of light oil, the total amount of impurities entering the gasification tank 1 per unit time can be reduced, and the deposition rate of impurities at the oil drain port can be reduced, which helps to alleviate the blockage of the oil drain port and further improves the operating stability of the gasification device.

[0077] Specifically, the control module is used to obtain the temperature inside the vaporizer 1 within a single cycle and calculate the temperature rise rate inside the vaporizer 1. If the temperature rise rate inside the vaporizer 1 is less than the preset rise rate, it is determined that the internal environment stability of the gasification device does not meet the requirements, and the hydrogen feed pressure is increased.

[0078] It can be understood that the two intervals divided by the preset increase rate correspond to two situations:

[0079] The first interval is when the temperature increase rate in the vaporization tank 1 is less than the preset increase rate, and the corresponding situation is: it is determined that the internal environment stability of the vaporization device meets the requirements;

[0080] The second interval is when the temperature rise rate in the vaporization tank 1 is greater than or equal to the preset rise rate. The corresponding situation is: due to long-term use, the resistance wire in the heater ages, resulting in occasional short circuits, which causes the temperature to fail to reach the preset temperature.

[0081] In practice, the preset temperature rise rate is generally selected in the range of [8°C / min, 12°C / min].

[0082] Preferably, the preset rising rate is 10° C. / min.

[0083] Specifically, the temperature increase rate in the vaporizer 1 is the ratio of the difference between the temperature in the vaporizer 1 at the end of a single cycle and the temperature in the vaporizer 1 at the beginning of a single cycle to the duration of the single cycle.

[0084] During implementation, the device of the present invention determines the internal environmental stability of the gasification device by setting a preset increase rate, thereby reducing the impact of the decline in the operating stability of the gasification device due to inaccurate determination of the internal environmental stability of the gasification device, and further improving the operating stability of the gasification device.

[0085] Specifically, the increase range of the hydrogen feed pressure is determined by the difference between a preset increase rate and a temperature increase rate in the gasification tank 1 .

[0086] Specifically, when the difference between the preset increase rate and the temperature increase rate in the vaporizer 1 is within 3°C / min, the hydrogen feed pressure increases to 1.1 times the original value; when the difference between the preset increase rate and the temperature increase rate in the vaporizer 1 exceeds 3°C / min, on the basis of being increased to 1.1 times the original value, the hydrogen feed pressure increases by 0.2 MPa for every 1°C / min exceeding it. For example, when the difference between the preset increase rate and the temperature increase rate in the vaporizer 1 is 5°C / min, the current hydrogen feed pressure is 1 MPa, and the increased hydrogen feed pressure is 1×1.1+0.2×2=1.5 MPa.

[0087] During implementation, the device of the present invention determines the feed pressure of hydrogen by setting a preset increase rate. Due to long-term use, the resistance wire in the heater ages, resulting in occasional short circuits, which causes the temperature to fail to reach the predetermined temperature. By increasing the feed pressure of hydrogen, the concentration of hydrogen in the gasification tank can be increased, and the contact with the light oil can be more complete, thereby accelerating the gasification reaction rate, thereby generating more heat, helping to increase the temperature increase rate in the gasification tank, and further improving the operating stability of the gasification device.

[0088] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A gasification device for light oil mixed with hydrogen gasification, characterized in that: include: A gasification module, for mixing hydrogen and light oil to react and output gaseous fuel gas, comprising a gasification unit for providing a gasification site, a light oil delivery unit connected to the gasification unit for inputting light oil, a circulation unit connected to the gasification unit for circulating the mixed oil-gas mixture, and an oil drain unit disposed at the bottom of the gasification unit for discharging waste oil; The gasification unit includes a gasification tank, the light oil delivery unit includes an oil supply pump for providing oil supply power, the circulation unit includes a circulation pump for providing circulation power, and the oil drain unit includes an oil drain valve for adjusting the flow of the waste oil; a detection module connected to the gasification module, comprising a pressure sensor disposed inside the gasification tank for detecting the pressure inside the gasification tank, a level gauge disposed inside the gasification tank for detecting the liquid level of the light oil, a temperature sensor disposed inside the gasification tank for detecting the internal temperature of the gasification tank, and a flow meter disposed below the oil drain valve for detecting the discharge flow rate of the waste oil; A control module is connected to the gasification module and the detection module respectively, and is used to determine the liquid level height in the gasification tank according to the fluctuation amplitude of the internal pressure of the gasification tank, or to determine the feed flow rate of light oil according to the average flow rate of the waste oil, and to determine the feed pressure of hydrogen according to the temperature increase rate in the gasification tank.

2. The gasification device for light oil mixed with hydrogen according to claim 1, characterized in that: The control module is used to determine the operating stability of the gasification device according to the fluctuation amplitude of the internal pressure of the gasification tank. If the fluctuation amplitude of the internal pressure of the gasification tank is greater than a preset first fluctuation amplitude, it is determined that the operating stability of the gasification device does not meet the requirements.

3. The gasification device for light oil mixed with hydrogen according to claim 2, characterized in that: The control module is used to preliminarily determine that the operating reliability of the gasification device does not meet the requirements when the fluctuation amplitude of the internal pressure of the gasification tank is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, and to determine whether the operating reliability of the gasification device meets the requirements based on the average flow rate of the waste oil.

4. The gasification device for light oil mixed with hydrogen according to claim 3, characterized in that: The control module is used to reduce the liquid level height in the vaporizer when the fluctuation amplitude of the internal pressure of the vaporizer is greater than the preset second fluctuation amplitude; The reduction range of the liquid level height in the vaporization tank is determined by the difference between the fluctuation range of the internal pressure of the vaporization tank and a preset second fluctuation range.

5. The gasification device for light oil mixed with hydrogen according to claim 4, characterized in that: The control module is used to determine the operational reliability of the gasification device according to the average flow rate of the waste oil. If the average flow rate of the waste oil is less than or equal to a preset second flow rate, it is determined that the operational reliability of the gasification device does not meet the requirements.

6. The gasification device for light oil mixed with hydrogen according to claim 5, characterized in that: The control module is used to preliminarily determine that the internal environmental stability of the gasification device does not meet the requirements when the average flow rate of the waste oil is less than or equal to a preset first flow rate, and to determine whether the internal environmental stability of the gasification device meets the requirements based on the temperature rise rate in the gasification tank.

7. The gasification device for light oil mixed with hydrogen according to claim 6, characterized in that: The control module is configured to reduce the feed flow rate of the light oil when the average flow rate of the waste oil is greater than the preset first flow rate and less than or equal to the preset second flow rate.

8. The gasification device for light oil mixed with hydrogen according to claim 7, characterized in that: The reduction range of the feed flow rate of the light oil is determined by the difference between the average flow rate of the waste oil and the preset first flow rate.

9. The gasification device for light oil mixed with hydrogen according to claim 8, characterized in that: The control module is used to determine the internal environmental stability of the gasification device according to the temperature rise rate in the gasification tank. If the temperature rise rate in the gasification tank is less than the preset rise rate, it is determined that the internal environmental stability of the gasification device does not meet the requirements, and the hydrogen feed pressure is increased.

10. The gasification device for light oil mixed with hydrogen gasification according to claim 9, characterized in that: The increase range of the hydrogen feed pressure is determined by the difference between a preset increase rate and a temperature increase rate in the vaporizer.

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