A gasification device for hydrogen-blended light oil gasification

Abstract

This invention relates to the field of light oil gasification technology, and more particularly to a gasification device for light oil hydrogen-blended gasification, comprising: a gasification module for mixing hydrogen and light oil to produce gaseous fuel gas; a detection module including a pressure sensor disposed inside the gasification tank to detect the internal pressure, a level gauge disposed inside the gasification tank to detect the liquid level of the light oil, a temperature sensor disposed inside the gasification tank to detect the internal temperature, and a flow meter disposed below the drain valve to detect the discharge velocity of waste oil; and a control module for determining the liquid level in the gasification tank based on the fluctuation range of the internal pressure, or determining the feed flow rate of the light oil based on the average flow velocity of the waste oil, and determining the feed pressure of hydrogen based on the rate of temperature rise in the gasification tank. This invention improves the operational stability of the gasification device.

Description

Technical Field

[0001] This invention relates to the field of light oil gasification technology, and more particularly to a gasification device for light oil hydrogen-blended gasification. Background Technology

[0002] Currently, traditional energy utilization methods suffer from numerous problems, such as low combustion efficiency and high pollutant emissions, making it difficult to meet the demands of sustainable development. The emergence of light oil-hydrogen blending gasification technology offers a new approach to solving these problems. By mixing light oil with hydrogen in a gasification reaction, high-calorific-value gaseous fuel can be produced, which not only improves energy utilization 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 manufacturing cost. To increase the gasification or combustion effect of fuel oil, 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 integrated. Furthermore, the light hydrocarbon gas will liquefy again when it is cooled during transportation. To overcome this problem, additional oil return and heating devices are usually required in the transportation pipeline, which increases the complexity of the equipment and the operating cost.

[0004] Chinese Patent Publication No. CN103045307A discloses a pyrolysis gasification method and apparatus for preparing tar-free hydrogen-rich gas. The method includes the following steps: 1) feeding carbonaceous solid raw materials into an upstream pyrolysis reactor via a feeding device for aerobic pyrolysis, producing pyrolysis gaseous products and solid products; 2) passing the pyrolysis gaseous products and solid products produced in step 1) into a downstream tar cracking reactor, removing tar through high-temperature pyrolysis, partial oxidation, and catalytic cracking of pyrolysis semi-coke; simultaneously, partial gasification of the pyrolysis semi-coke yields pyrolysis gas and pyrolysis semi-coke. It is evident that the pyrolysis gasification method and apparatus for preparing tar-free hydrogen-rich gas suffer from a problem: wear of the valve stem in the regulating valve of the oil supply pipeline after long-term use leads to inaccurate oil flow regulation, resulting in unstable pressure inside the gasification tank and a decrease in the operational stability of the gasification apparatus. Summary of the Invention

[0005] Therefore, the present invention provides a gasification device for hydrogen-blended light oil, which overcomes the problem in the prior art where the valve stem of the regulating valve in the oil supply pipeline wears down after long-term use, resulting in inaccurate oil supply flow regulation and unstable pressure inside the gasification tank, thus causing a decrease in the operational stability of the gasification device.

[0006] To achieve the above objectives, the present invention provides a gasification device for hydrogen-blended light oil, comprising: a gasification module for mixing hydrogen and light oil to output gaseous fuel gas, including a gasification unit for providing a gasification site, a light oil conveying 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 draining unit disposed at the bottom of the gasification unit for discharging waste oil; wherein, the gasification unit includes a gasification tank, the light oil conveying 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 draining unit includes a drain valve for regulating the flow rate of the waste oil. An oil valve; a detection module connected to the vaporization module, including a pressure sensor installed inside the vaporization tank to detect the pressure inside the vaporization tank, a level gauge installed inside the vaporization tank to detect the liquid level of light oil, a temperature sensor installed inside the vaporization tank to detect the temperature inside the vaporization tank, and a flow meter installed below the drain valve to detect the discharge flow rate of waste oil; a control module connected to both the vaporization module and the detection module, used to determine the liquid level in the vaporization tank based on the fluctuation range of the pressure inside the vaporization tank, or to determine the feed flow rate of light oil based on the average flow rate of waste oil, and to determine the feed pressure of hydrogen based on the rate of temperature increase inside the vaporization tank.

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

[0008] Furthermore, the control module is used to preliminarily determine that the operational reliability of the gasification device does not meet the requirements when the pressure fluctuation amplitude inside 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 operational 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 inside the vaporization tank when the pressure fluctuation amplitude inside the vaporization tank is greater than the preset second fluctuation amplitude;

[0010] The reduction in the liquid level height inside 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 based on 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, the operational reliability of the gasification device is determined to be unsatisfactory.

[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 inside the gasification tank.

[0013] Furthermore, the control module is used to reduce the feed flow rate of 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 in 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.

[0015] Furthermore, the control module is used to determine the internal environmental stability of the gasification device based on the temperature rise rate inside the gasification tank. If the temperature rise rate inside 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.

[0016] Furthermore, the increase in the hydrogen feed pressure is determined by the difference between the preset increase rate and the temperature increase rate inside the gasification tank.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The device of the present invention, by setting a gasification module, a detection module, and a control module, determines the liquid level height in the gasification tank according to the pressure fluctuation amplitude inside the gasification tank. Because the valve stem in the regulating valve of the oil supply pipeline wears down after long-term use, resulting in inflexible movement, the oil supply flow rate regulation is inaccurate, leading to unstable light oil entering the reactor, and thus unstable pressure inside the gasification tank. By reducing the liquid level height in the gasification tank, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations and mitigating the amplitude of pressure fluctuations to a certain extent. The feed flow rate of light oil is determined based on the average flow velocity of the waste oil. Since the light oil feedstock may contain solid impurities, as the light oil enters… As the light oil enters the vaporization tank, it may gradually deposit at the drain port, causing partial blockage of the drain pipe. By reducing the feed flow rate of light oil, the total amount of impurities entering the vaporization tank per unit time can be reduced, thus slowing down the deposition rate of impurities at the drain port and helping to alleviate the blockage. The feed pressure of hydrogen is determined based on the temperature rise rate inside the vaporization tank. Due to prolonged use, the resistance wire in the heater ages, causing occasional short circuits, which prevents the temperature from reaching the predetermined level. Increasing the feed pressure of hydrogen increases the concentration of hydrogen inside the vaporization tank, allowing for more thorough contact with the light oil, accelerating the vaporization reaction rate, and generating more heat. This helps to increase the temperature rise rate inside the vaporization tank and improves the operational stability of the vaporization unit.

[0018] Furthermore, the device of the present invention determines the liquid level height in the gasification tank by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Due to wear and tear on the valve stem of the regulating valve in the oil supply pipeline after long-term use, the movement becomes inflexible, resulting in inaccurate adjustment of the oil supply flow rate and unstable amount of light oil entering the reactor, which in turn leads to unstable pressure inside the gasification tank. By reducing the liquid level height in the gasification tank, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations, mitigating the amplitude of pressure fluctuations to a certain extent, and further improving the operational stability of the gasification device.

[0019] Furthermore, 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 feed may contain solid impurities, as the light oil enters the gasification tank, they may gradually deposit at the oil drain port, causing partial blockage of the oil drain port pipe. By reducing the feed flow rate of light oil, the total amount of impurities entering the gasification tank per unit time can be reduced, the deposition rate of impurities at the oil drain port can be reduced, the blockage of the oil drain port can be alleviated, and the operational stability of the gasification device can be further improved.

[0020] Furthermore, the device of the present invention determines the feed pressure of hydrogen by setting a preset rise rate. Due to the aging of the resistance wire in the heater caused by long-term use, occasional short circuits may occur, resulting in the temperature not reaching the predetermined temperature. By increasing the feed pressure of hydrogen, the concentration of hydrogen in the gasification tank can be increased, allowing for more thorough contact with light oil, accelerating the gasification reaction rate, and generating more heat. This helps to increase the temperature rise rate in the gasification tank, further improving the operational stability of the gasification device. Attached Figure Description

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

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

[0023] Figure 3 This is a logic flowchart illustrating the process of determining the liquid level in the gasification tank of a gasification device for light oil hydrogenation according to an embodiment of the present invention.

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

[0025] The attached diagram is labeled as follows: 1-Gasification tank, 2-Temperature sensor, 3-Gas delivery pipeline, 4-Pressure sensor, 5-Pressure gauge, 6-Gas discharge pipeline, 7-Vent valve, 8-Safety valve, 9-Circulation pipeline, 10-Level gauge, 11-Electric heater, 12-Circulation pump, 13-Mesh outlet pipe, 14-Oil drain valve, 15-Flow meter, 16-Oil drain port, 17-Oil supply pump, 18-Oil delivery pipeline, 19-Support. Detailed Implementation

[0026] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of 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 this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate 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 is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0029] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The figures shown are, respectively, a schematic diagram of the overall structure of the gasification device for light oil hydrogenation according to an embodiment of the present invention, a block diagram of the overall structure, a logic flowchart of the process for determining the liquid level in the gasification tank, and a logic flowchart of the process for determining the feed flow rate of light oil. The present invention provides a gasification device for light oil hydrogenation, comprising:

[0031] A gasification module for mixing hydrogen and light oil to produce gaseous fuel gas includes a gasification unit for providing a gasification site, a light oil conveying 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 draining unit located at the bottom of the gasification unit for discharging waste oil.

[0032] The gasification unit includes a gasification tank 1, the light oil conveying 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 draining unit includes an oil draining valve 14 for adjusting the flow rate of the waste oil.

[0033] The detection module, which is connected to the gasification module, includes a pressure sensor 4 installed inside the gasification tank 1 to detect the pressure inside the gasification tank 1, a level gauge 10 installed inside the gasification tank 1 to detect the liquid level of the light oil, a temperature sensor 2 installed inside the gasification tank 1 to detect the temperature inside the gasification tank 1, and a flow meter 15 installed below the drain valve 14 to detect the discharge flow rate of waste oil.

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

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

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

[0037] Specifically, the loop unit also includes:

[0038] The circulation pipeline 9 is connected to the gasification tank 1 and is used to transport the oil-gas mixture;

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

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

[0041] Specifically, the gasification module also includes:

[0042] Gas delivery pipeline 3, which is connected to the vaporization tank 1, is used to deliver hydrogen;

[0043] The mesh outlet pipe 13 is connected to the gas delivery pipeline 3 and is used to discharge hydrogen into the vaporization tank 1;

[0044] Gas discharge pipe 6 is installed at the top of the gasification tank 1 to discharge gaseous fuel gas;

[0045] Pressure gauge 5, which is connected to the vaporization tank 1, is used to display the internal pressure of the vaporization tank 1;

[0046] Air release valve 7, which is connected to the vaporization tank 1, is used to remove air from the vaporization tank 1 in the early stage;

[0047] Safety valve 8, which is connected to the vaporization tank 1, is used to provide protection in case of overpressure inside the vaporization tank 1.

[0048] In implementation, the device of this invention, by setting up a gasification module, a detection module, and a control module, determines the liquid level height inside the gasification tank 1 based on the fluctuation range of the internal pressure. Because the valve stem in the regulating valve of the oil supply pipeline wears down after long-term use, resulting in inflexible movement, the oil supply flow rate regulation is inaccurate, leading to unstable light oil entering the reactor, and consequently, unstable pressure inside the gasification tank 1. By increasing the liquid level height inside the gasification tank 1, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations and mitigating the amplitude of pressure fluctuations to some extent. The feed flow rate of light oil is determined based on the average flow velocity of the waste oil. Since the light oil feedstock may contain solid impurities, these impurities may be present as the light oil enters the gasification tank 1. Impurities will gradually accumulate at the oil drain port 16, causing partial blockage of the pipe at 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 decreased, which helps to alleviate the blockage at the oil drain port. The feed pressure of hydrogen is determined according to the temperature rise rate in the gasification tank 1. Due to the aging of the resistance wire in the heater caused by long-term use, occasional short circuits occur, resulting in the temperature not reaching 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 light oil can be more sufficient, accelerating the gasification reaction rate and generating more heat, which helps to increase the temperature rise rate in the gasification tank and improve the operational stability of the gasification device.

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

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

[0051] It is understandable that the three intervals defined by the preset first fluctuation range and the preset second fluctuation range correspond to three different scenarios:

[0052] The first interval is when the fluctuation range of the internal pressure of gasification tank 1 is less than or equal to the preset first fluctuation range, which corresponds to the situation that the operation stability of the gasification device meets the requirements.

[0053] The second range is when the pressure fluctuation inside the vaporizer 1 is greater than the preset first fluctuation range and less than or equal to the preset second fluctuation range. The corresponding situation is: because the light oil feedstock may contain solid impurities, as the light oil enters the vaporizer 1, it 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 range is when the pressure fluctuation inside the vaporizer 1 is greater than the preset second fluctuation range. The corresponding situation is: the valve stem in the regulating valve of the oil supply pipeline wears down after long-term use, resulting in inflexible movement, which leads to inaccurate regulation of the oil supply flow rate, resulting in unstable amount of light oil entering the reactor, and thus 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 first fluctuation amplitude is preset to 0.2 MPa in a preferred embodiment, and the second fluctuation amplitude is preset to 0.5 MPa in a preferred embodiment.

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

[0058] In practice, the device of the present invention determines the operational stability of the gasification device by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude, thereby reducing the impact of the decrease in the operational accuracy of the gasification device due to the inaccuracy in determining the operational stability of the gasification device, and further improving the operational stability of the gasification device.

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

[0060] The reduction in the liquid level height inside 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 internal pressure fluctuation of vaporization tank 1 and the preset second fluctuation amplitude is within 0.1 MPa, the liquid level in vaporization tank 1 is reduced to 0.95 times its original value. When the difference between the internal pressure fluctuation of vaporization tank 1 and the preset second fluctuation amplitude exceeds 0.1 MPa, in addition to reducing it to 0.95 times its original value, for every 0.05 MPa exceeding the preset second fluctuation amplitude, the liquid level in vaporization tank 1 is reduced by 0.1 m. For example, if the difference between the internal pressure fluctuation of vaporization tank 1 and the preset second fluctuation amplitude is 0.2 MPa, and the current liquid level in vaporization tank 1 is 2 m, the reduced liquid level in vaporization tank 1 will be 2 × 0.95 - 0.1 × 2 = 1.7 m.

[0062] In practice, the device of the present invention determines the liquid level in the gasification tank 1 by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Due to wear and tear on the valve stem of the regulating valve in the oil supply pipeline after long-term use, the movement becomes inflexible, resulting in inaccurate regulation of the oil supply flow rate. This leads to an unstable amount of light oil entering the reactor, which in turn causes unstable pressure inside the gasification tank 1. By increasing the liquid level in the gasification tank 1, the gas phase space can be increased, providing a certain buffer space for pressure fluctuations, mitigating the amplitude of pressure fluctuations to a certain extent, and further improving the operational stability of the gasification device.

[0063] Specifically, the control module is used to obtain the flow rate of waste oil within several oil draining cycles and calculate the average flow rate of waste oil. If the average flow rate of 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.

[0064] Specifically, the control module is used to initially 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 1.

[0065] It is understandable that the three intervals defined by the preset first flow velocity and the preset second flow velocity correspond to three different scenarios:

[0066] The first interval is when the average flow rate of waste oil is less than or equal to the preset first flow rate. The corresponding situation is: due to long-term use, the resistance wire in the heater ages, causing occasional short circuits, which results in the temperature not reaching the preset temperature.

[0067] The second interval is when the average flow rate of waste oil is greater than the preset first flow rate and less than or equal to the preset second flow rate. The corresponding situation is: since the light oil feedstock may contain solid impurities, as the light oil enters the gasification tank 1, it 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 velocity of the waste oil is greater than the preset second flow velocity, which corresponds to the situation where the operational reliability of the gasification unit is confirmed to meet the requirements.

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

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

[0071] Specifically, the average flow velocity of waste oil is the ratio of the total flow velocity of waste oil over several drainage cycles to the number of drainage cycles.

[0072] In practice, 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 inaccurate determination of the operational reliability of the gasification device leading to a decrease in the operational stability of the gasification device and further improving the operational stability of the gasification device.

[0073] Specifically, the control module is used to reduce the feed flow rate of 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 in 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.

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

[0076] In practice, 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 deposit at the oil drain port 16, causing partial blockage of the pipe at 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, the deposition rate of impurities at the oil drain port can be reduced, the blockage of the oil drain port can be alleviated, and the operational stability of the gasification device can be further improved.

[0077] Specifically, the control module is used to obtain the temperature inside the gasification tank 1 within a single cycle and calculate the temperature rise rate inside the gasification tank 1. If the temperature rise rate inside the gasification tank 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 is understandable that the two intervals defined by the preset rate of increase correspond to two different scenarios:

[0079] The first interval is when the temperature rise rate inside gasification tank 1 is less than the preset rise rate, which corresponds to the situation where the internal environment stability of the gasification device is determined to meet the requirements.

[0080] The second range is when the temperature rise rate in vaporization tank 1 is greater than or equal to the preset rise rate. The corresponding situation is that the resistance wire in the heater ages due to long-term use, which causes occasional short circuits, resulting in the temperature not reaching the preset temperature.

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

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

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

[0084] In practice, the device of the present invention determines the internal environmental stability of the gasification device by setting a preset rise rate, thereby reducing the impact of inaccurate determination of the internal environmental stability of the gasification device leading to a decrease in the operational stability of the gasification device, and further improving the operational stability of the gasification device.

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

[0086] Specifically, when the difference between the preset rise rate and the temperature rise rate inside the vaporizer 1 is within 3℃ / min, the hydrogen feed pressure increases to 1.1 times the original value. When the difference between the preset rise rate and the temperature rise rate inside the vaporizer 1 exceeds 3℃ / min, in addition to increasing to 1.1 times the original value, the hydrogen feed pressure increases by 0.2MPa for every 1℃ / min increase. For example, if the difference between the preset rise rate and the temperature rise rate inside the vaporizer 1 is 5℃ / min, and the current hydrogen feed pressure is 1MPa, the increased hydrogen feed pressure will be 1×1.1+0.2×2=1.5MPa.

[0087] In practice, the device of the present invention determines the feed pressure of hydrogen by setting a preset rise rate. Due to the aging of the resistance wire in the heater caused by long-term use, occasional short circuits occur, resulting in the temperature not reaching the predetermined temperature. By increasing the feed pressure of hydrogen, the concentration of hydrogen in the gasification tank can be increased, the contact with light oil can be more sufficient, the gasification reaction rate can be accelerated, and more heat can be generated, which helps to increase the temperature rise rate in the gasification tank and further improves the operational stability of the gasification device.

[0088] The technical solution of the present invention has been described above with reference to 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 can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A gasification device for hydrogen-blended light oil, characterized in that, include: A gasification module for mixing hydrogen and light oil to produce gaseous fuel gas includes a gasification unit for providing a gasification site, a light oil conveying 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 draining unit located at the bottom of the gasification unit for discharging waste oil. The gasification unit includes a gasification tank, the light oil conveying 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 draining unit includes an oil draining valve for adjusting the flow rate of the waste oil. The detection module, which is connected to the gasification module, includes a pressure sensor installed inside the gasification tank to detect the pressure inside the gasification tank, a level gauge installed inside the gasification tank to detect the liquid level of the light oil, a temperature sensor installed inside the gasification tank to detect the temperature inside the gasification tank, and a flow meter installed below the drain valve to detect the discharge flow rate of waste oil. The control module, which is connected to the gasification module and the detection module respectively, is used to determine the liquid level in the gasification tank based on the fluctuation range of the pressure inside the gasification tank, or to determine the feed flow rate of light oil based on the average flow rate of waste oil, and to determine the feed pressure of hydrogen based on the temperature rise rate inside the gasification tank. The control module is used to determine the operational stability of the gasification device based on the fluctuation range of the internal pressure of the gasification tank. If the fluctuation range of the internal pressure of the gasification tank is greater than the preset first fluctuation range, it is determined that the operational stability of the gasification device does not meet the requirements. When the pressure fluctuation inside the gasification tank is greater than the preset first fluctuation range and less than or equal to the preset second fluctuation range, it is preliminarily determined that the operational reliability of the gasification device does not meet the requirements, and the operational reliability of the gasification device is determined based on the average flow rate of the waste oil. When the pressure fluctuation inside the vaporization tank exceeds the preset second fluctuation range, the liquid level inside the vaporization tank is reduced. The reduction in the liquid level height inside the vaporization tank is determined by the difference between the fluctuation range of the internal pressure of the vaporization tank and the preset second fluctuation range. The control module is used to determine the operational reliability of the gasification unit based on the average flow rate of the waste oil. If the average flow rate of the waste oil is less than or equal to the preset second flow rate, the operational reliability of the gasification unit is determined to be unsatisfactory. When the average flow velocity of waste oil is less than or equal to the preset first flow velocity, it is preliminarily determined that the internal environmental stability of the gasification unit does not meet the requirements, and the internal environmental stability of the gasification unit is determined based on the temperature rise rate in the gasification tank. When the average flow velocity of waste oil is greater than the preset first flow velocity but less than or equal to the preset second flow velocity, reduce the feed flow rate of light oil. The reduction in the feed flow rate of light oil is determined by the difference between the average flow velocity of waste oil and the preset first flow velocity.

2. The gasification device for light oil hydrogenation according to claim 1, characterized in that, The control module is used to determine the internal environmental stability of the gasification device based on the temperature rise rate inside the gasification tank. If the temperature rise rate inside 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. The increase in the hydrogen feed pressure is determined by the difference between the preset rise rate and the temperature rise rate inside the gasification tank.

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