Inferior oil pretreatment system

Abstract

The utility model provides an inferior oil product pretreatment system. The inferior oil product pretreatment system comprises a raw material leading-in subsystem, a pretreatment subsystem and an oil product leading-out subsystem which are communicated in sequence, wherein the pretreatment subsystem comprises at least one of an electric field treatment subsystem, a microwave treatment subsystem and a hydrotreating subsystem. According to the pretreatment system, pretreatment of inferior oil products is achieved, additives are not needed, waste water is not generated, and the quality of the oil products is improved; and a process route with excellent technical economy is provided for subsequent oil product processing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil processing technical field, specifically relates to a poor quality oil pretreatment system. BACKGROUND

[0002] The composition of poor quality oil is complex, and a large amount of chemical raw materials such as heavy aromatic hydrocarbons, C9, etc. are used, and even oil made of waste plastics may be contained, and a large amount of impurity elements such as Fe, N, Si and Cl are contained. The poor quality oil generally has high density, large viscosity and high solidification point, and generally contains more gum and asphaltene, and when the content of these components increases, the quality of the oil will be poor.

[0003] The poor quality oil includes but is not limited to waste plastic oil, waste tire oil, waste engine oil and poor quality crude oil, and generally contains a large amount of impurities, which can cause catalyst poisoning, equipment corrosion and coking problems, and limit the direct use of poor quality oil. However, the poor quality oil has a lower cost price than the general oil because it is more difficult to process. Although more complex oil refining processes and technologies are required to process the poor quality oil, refining the poor quality oil can have better economic benefits, especially in the production of asphalt products. However, regardless of the way the poor quality oil is processed, pretreatment is essential, especially the chlorides in the poor quality oil, which not only corrode the distillation equipment, but also affect the service life of the catalyst, so removing these chlorides is crucial for further processing and utilization of the poor quality oil.

[0004] At present, the traditional poor quality oil dechlorination technology includes alkali washing method, ionic liquid method, etc. Although the alkali washing method can effectively remove inorganic chlorides in the oil, it has some disadvantages, for example, the alkali washing method cannot remove organic chlorides; the alkali water can be easily mixed with the oil and cannot be separated; at the same time, a large amount of waste water and waste liquid will be produced, and additional cost and equipment are required to treat the waste water; in addition, the alkali washing method may introduce new impurities, affecting the recycling of the oil. As a kind of dechlorination agent, ionic liquid has a good application prospect in the dechlorination of poor quality oil due to its unique physical and chemical properties, such as low volatility, high thermal stability and adjustable chemical structure. The ionic liquid can react with the chlorides in the oil to generate compounds that are easy to separate, thereby realizing dechlorination. However, the cost of ionic liquid is high, and its regeneration and recovery technology still needs further research.

[0005] As disclosed in Chinese patent document CN205473630U, a poor-quality oil product treatment and recovery system includes a poor-quality oil product storage tank, a distillation reaction kettle, a condenser, a base oil collecting device, a condensate collecting tank, and a sewage treatment device. The inlet of the distillation reaction kettle is in communication with the outlet of the poor-quality oil product storage tank. The outlet of the distillation reaction kettle is in communication with the inlet of the condenser. The inlet of the base oil collecting device and the inlet of the condensate collecting tank are both in communication with the condenser. A liquid discharge port is arranged on the condensate collecting tank, and the sewage treatment device is in communication with the liquid discharge port of the condensate collecting tank. An alkali solution metering tank for providing alkali solution to the distillation reaction kettle is arranged on the distillation reaction kettle and in communication with the distillation reaction kettle. However, the alkali washing method does not have a removal effect on organic chlorides; the alkali water can easily mix with the oil product and cannot be separated; the alkali washing method can produce a large amount of wastewater, and additional costs and equipment are required to treat the wastewater; in addition, the alkali washing method can introduce new impurities, affecting the recycling of the oil product.

[0006] Chinese patent document CN111019750A discloses a system for removing chlorine from poor-quality oil products using alkaline ionic liquid, belonging to the field of poor-quality oil product purification and pretreatment, and including the following steps: S01: mixing alkaline ionic liquid and poor-quality oil product in a certain proportion for reaction; S02: after the reaction is completed, performing liquid separation treatment to obtain dechlorinated poor-quality oil product and ionic liquid containing chlorine. However, the cost of ionic liquid itself is high; the eluted ionic liquid is difficult to recover; the eluted ionic liquid is difficult to regenerate; the ionic liquid itself can introduce new impurities, affecting the recycling of the oil product.

[0007] Chinese patent document CN108102700A discloses a combined process method and system for treating poor-quality oil products, relating to the field of poor-quality oil product treatment. The combined process method for treating poor-quality oil products includes: heavy oil raw material, generated oil from a fixed bed hydroprocessing reaction zone, and hydrogen gas are mixed and then enter a boiling bed hydrocracking reaction zone for reaction, and the reaction effluent is separated to obtain dry gas, liquefied gas, gasoline, diesel, and heavy fraction; the obtained heavy fraction sequentially passes through a fixed bed hydrogen pretreatment reaction zone and a fixed bed hydroprocessing reaction zone arranged in series, and the generated oil from the fixed bed hydroprocessing reaction zone enters the boiling bed hydrocracking reaction zone. According to the method, the operation cycle of the treatment device can be greatly prolonged. However, this scheme mainly processes distillates or secondary processed oil products obtained by treating and refining crude oil, and the oil product quality is good, which is not suitable for more poor-quality oil products such as waste plastic oil, waste tire oil, waste engine oil, and poor-quality crude oil.

[0008] The dechlorination of impurities in poor oil products not only needs to consider the effectiveness of the technology, but also needs to consider its impact on the environment and economic feasibility, and the economy of the dechlorination technology is also an important factor affecting its popularization and application. In industrial applications, more practical factors need to be considered, such as operating conditions, cost-effectiveness and equipment reliability. Especially, converting laboratory technology into industrial application needs to overcome many technical and economic obstacles. Therefore, it is of great significance to develop a system suitable for industrialization for the reuse of poor oil products, which can effectively remove chlorine in poor oil products without introducing new impurities. SUMMARY

[0009] Therefore, the poor oil product pretreatment system provided by the utility model realizes the pretreatment of poor oil products, does not need to add additives, does not produce waste water, and improves the quality of oil products, thereby providing a process route with excellent technical and economic performance for subsequent oil product processing.

[0010] To achieve the above object, the utility model adopts the following technical scheme:

[0011] A poor oil product pretreatment system, comprising a raw material introduction subsystem, a pretreatment subsystem and an oil product export subsystem which are sequentially connected.

[0012] The pretreatment subsystem comprises at least one of an electric field treatment subsystem, a microwave treatment subsystem and a hydrogenation treatment subsystem.

[0013] In an alternative embodiment, the pretreatment subsystem comprises any two of the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem, and is connected in parallel or in series in any order.

[0014] In an alternative embodiment, the pretreatment subsystem comprises the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem which are connected in parallel or in series in any order.

[0015] In an alternative embodiment, the specific parameters in the electric field treatment subsystem can be adjusted according to actual conditions and are not specifically limited. For example, the voltage of the electric field treatment subsystem can be controlled to be 1-100000V, preferably 220-99000V; the pressure can be controlled to be 0.1-14MPa, preferably 0.2-10MPa; and the reaction temperature can be controlled to be 0-10000K, preferably 10-9000K.

[0016] In an alternative embodiment, the parameters of the microwave treatment subsystem are not specifically limited and can be adjusted according to actual conditions. For example, the electric efficiency of the microwave treatment subsystem can be controlled to be 0-100%, preferably 0-99%; the pressure can be controlled to be 0.1-14MPa, preferably 0.2-10MPa; and the reaction temperature can be controlled to be 0-10000K, preferably 10-9000K.

[0017] In an alternative embodiment, the parameters of the hydrogenation treatment subsystem are not specifically limited and can be adjusted according to actual conditions. The hydrogenation catalyst can be conventional in the industry, and the diameter thereof can be controlled to be 1-5 mm. For example, the hydrogen oil volume ratio of the hydrogenation treatment subsystem can be controlled to be 100:1-1000:1, preferably 100:1-1000:1; the volume space velocity can be 0.2-4.0 h -1 , preferably 0.4-2.5 h -1 ; the pressure can be 0.1-14 MPa, preferably 0.2-10 MPa; and the reaction temperature can be 0-10000 K, preferably 10-9000 K.

[0018] In an alternative embodiment, the poor oil product is selected from at least one of waste plastic oil, waste tire oil, waste engine oil, and poor crude oil.

[0019] In an alternative embodiment, the waste tire oil is selected from at least one of high alkanes waste tire oil and high aromatic hydrocarbon waste tire oil; the waste engine oil is selected from at least one of waste synthetic lubricating oil and waste mineral lubricating oil; and the poor crude oil is selected from at least one or more of heavy crude oil, sulfur-containing crude oil, high-sulfur crude oil, and high-acid crude oil.

[0020] In an alternative embodiment, a raw material pretreatment subsystem in communication with the raw material introduction subsystem is further included, and the raw material pretreatment subsystem includes a solid impurity removal subsystem and / or a pH adjustment subsystem in any order.

[0021] In an alternative embodiment, the raw material introduction subsystem and the oil product discharge subsystem each independently includes at least one of a delivery pump, a pneumatic conveying device, and a gravity conveying device.

[0022] In an alternative embodiment, the poor oil product can be transported from any one of a poor oil product tank car, a storage tank, an oil pool, a raw material tank, an oil barrel, and an oil field block site to the pretreatment subsystem through the raw material introduction subsystem.

[0023] In an alternative embodiment, a process control subsystem in communication with each subsystem is further included, and the process control subsystem includes a pressure monitor and / or a temperature monitor, etc. The voltage, pressure, and temperature parameters of each processing subsystem are monitored and adjusted in real time.

[0024] In an alternative embodiment, the process control subsystem is further provided with a sensor array, a central controller, an actuator network, and a communication interface, and is provided with voltage, pressure, and temperature monitoring and control interlocking.

[0025] In an alternative embodiment, a quality monitoring subsystem is also included in communication with the oil product export subsystem for monitoring at least one of the density, sulfur content, nitrogen content, total chlorine, inorganic chlorine, organic chlorine, distillation range, etc. of the oil product. By performing quality control on the oil product export subsystem, the physical and chemical properties of the oil product are monitored to ensure that the oil product meets the requirements of the pretreatment.

[0026] In an alternative embodiment, the feedstock import subsystem and the oil product export subsystem are each provided with flow monitoring devices and flow control devices.

[0027] In an alternative embodiment, the process control subsystem is responsible for implementing precise control over each of the processing subsystems within the system. The process control subsystem integrates conventional sensors, controllers, actuators, and advanced control algorithms to ensure the efficiency, stability, and adaptability of the pretreatment process.

[0028] In an alternative embodiment, the process control subsystem employs advanced control strategies, such as adaptive control, which automatically adjusts processing parameters based on real-time monitoring data to adapt to changes in oil product properties; predictive control, which utilizes historical data and trend analysis to predict and optimize future processing; fault diagnosis and self-healing, which monitors system status in real-time and immediately diagnoses and automatically takes corrective measures upon detecting abnormalities.

[0029] In an alternative embodiment, the process control subsystem provides an intuitive user interface that enables operators to monitor system status, adjust processing parameters, view historical data, and generate reports.

[0030] In an alternative embodiment, the process control subsystem incorporates multiple safety mechanisms, including overload protection, leak detection, and emergency shutdown, to ensure the safety of personnel and equipment; and optimizes processing parameters to reduce energy and raw material consumption and environmental impact.

[0031] The utility model has the advantages that:

[0032] The poor oil product pretreatment system can selectively use at least one of the electric field processing subsystem, the microwave processing subsystem, and the hydrogenation processing subsystem for different poor oil products, in combination with the feedstock import subsystem and the oil product export subsystem. The system effectively removes impurities and chlorides in the oil product, improves the quality of the oil product, does not use chemical raw materials, does not introduce new impurities, is energy-saving and environmentally friendly, reduces the impact on the environment, and provides a technically and economically excellent process route for subsequent oil product processing. In addition, the pretreatment system has a compact structure and is easy to operate. In the actual operation process, the parameters of each processing subsystem can be adjusted to further adapt to the pretreatment of different types of poor oil products.

[0033] In addition, the poor oil product pretreatment system provided by the utility model, through further limiting process control subsystem, integrated design, improve the pretreatment efficiency and oil quality, at the same time, the automatic process control reduces manual intervention, reduces energy consumption and production cost, reduces material consumption, reduces energy consumption, further improves the economic benefit, and low energy consumption, short process. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a schematic view of a poor oil product pretreatment system provided by the utility model;

[0035] Figure 2 It is a schematic view of a raw material introduction subsystem in a poor oil product pretreatment system provided by the utility model;

[0036] Figure 3 It is a schematic view of a process control subsystem in a poor oil product pretreatment system provided by the utility model. DETAILED DESCRIPTION

[0037] The utility model will be specifically described below through examples. It is necessary to point out here that the following examples are only used for further illustrating the utility model and cannot be understood as limiting the protection scope of the utility model, and the skilled person in the art can make some non-essential improvements and adjustments to the utility model according to the content of the utility model.

[0038] The specific experimental steps or conditions not mentioned in the examples can be carried out according to the conventional experimental steps operation or conditions described in the literature in the art. The reagent or instrument used without mentioning the manufacturer is all the conventional reagent product that can be obtained by market purchase.

[0039] The utility model will be further illustrated below through examples, but it is not considered that the utility model is limited to this.

[0040] Example 1

[0041] A poor oil product pretreatment system, including raw material introduction subsystem, pretreatment subsystem and oil product export subsystem that communicate sequentially;

[0042] Wherein, the pretreatment subsystem includes at least one of electric field processing subsystem, microwave processing subsystem, hydrogenation processing subsystem.

[0043] The pretreatment subsystem can be selected from one, two or three of the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem according to the actual situation of the poor oil to be treated, and when the pretreatment subsystem is selected from two or three of the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem, the subsystems can be connected in parallel or in series in any order. For example, when the pretreatment subsystem includes the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem, the arrangement of the three subsystems can be selected as:

[0044] (1) first through one subsystem, and then through two subsystems in parallel: for example, the electric field treatment subsystem can be first passed through, and then the microwave treatment subsystem and the hydrogenation treatment subsystem in parallel can be passed through; or the microwave treatment subsystem can be first passed through, and then the electric field treatment subsystem and the hydrogenation treatment subsystem in parallel can be passed through; or the hydrogenation treatment subsystem can be first passed through, and then the electric field treatment subsystem and the microwave treatment subsystem in parallel can be passed through.

[0045] (2) the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem in parallel can be passed through at the same time;

[0046] (3) the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem in series can be passed through: for example, the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem can be passed through in sequence; or the electric field treatment subsystem, the hydrogenation treatment subsystem and the microwave treatment subsystem can be passed through in sequence; or the microwave treatment subsystem, the electric field treatment subsystem and the hydrogenation treatment subsystem can be passed through in sequence; or the microwave treatment subsystem, the hydrogenation treatment subsystem and the electric field treatment subsystem can be passed through in sequence; or the hydrogenation treatment subsystem, the electric field treatment subsystem and the microwave treatment subsystem can be passed through in sequence; or the hydrogenation treatment subsystem, the microwave treatment subsystem and the electric field treatment subsystem can be passed through in sequence.

[0047] When the pretreatment subsystem is selected from any two of the electric field treatment subsystem, the microwave treatment subsystem and the hydrogenation treatment subsystem, the two selected subsystems can be connected in series or in parallel in any order;

[0048] The pretreatment subsystem can also be selected to use only the electric field treatment subsystem, or only the microwave treatment subsystem, or only the hydrogenation treatment subsystem;

[0049] The above is only part of the optional schemes, but is not limited thereto. The arrangement of the multiple subsystems includes series connection of any subsystem, parallel connection of the subsystems or mixed series-parallel connection of the subsystems.

[0050] Furthermore, the substandard oil products processed in this substandard oil pretreatment system are selected from at least one of waste plastic oil, waste tire oil, waste engine oil, and substandard crude oil. The oil obtained after secondary processing has better performance than substandard oil products such as waste plastic oil; therefore, this system can also process it. Thus, this substandard oil pretreatment system has good applicability.

[0051] In one alternative embodiment, the inferior oil pretreatment system further includes a feedstock pretreatment subsystem connected to the feedstock inlet subsystem, the feedstock pretreatment subsystem including a solid impurity removal subsystem and / or a pH adjustment subsystem connected in any order.

[0052] In one alternative approach, the raw material inlet subsystem and the oil outlet subsystem of the substandard oil pretreatment system each independently include at least one of a transfer pump, a pneumatic conveying device, a gravity conveying device, etc., which can be selected according to the actual situation.

[0053] In one alternative approach, the substandard oil pretreatment system also includes a process control subsystem connected to each subsystem, such as... Figure 3 As shown, when the voltage is high, the process control subsystem can control the transformer to reduce the voltage; when the voltage is low, the process control subsystem can control the transformer to increase the voltage. When the temperature is high, the process control subsystem can control the electric heater to turn off; when the temperature is low, the process control subsystem can control the electric heater to turn on. When the pressure is high, the process control subsystem can control the valve to open; when the pressure is low, the process control subsystem can control the air intake to increase and the valve to close. When the pressure is too high, the process control subsystem can control emergency pressure relief to ensure the safe and stable operation of the entire system.

[0054] Specifically, such as Figure 1 As shown, this utility model provides a pretreatment system for substandard oil products, comprising a raw material inlet subsystem, a pretreatment subsystem, an oil product outlet subsystem, and a quality monitoring subsystem connected in sequence; each subsystem is connected to a process control subsystem for controlling the safe and stable operation of each subsystem. The quality monitoring subsystem is used to monitor at least one of the following parameters of the oil product: density, sulfur content, nitrogen content, total chlorine, inorganic chlorine, organic chlorine, and distillation range.

[0055] In one alternative approach, the raw material inlet subsystem and the oil outlet subsystem of the inferior oil pretreatment system are each equipped with a flow monitoring device and a flow control device, respectively. Figure 2 As shown, when the flow rate is high, the flow control valve can be depressed; when the flow rate is low, the flow control valve can be increased.

[0056] Example 2

[0057] use Figure 1The system shown takes a mixed oil product, denoted as MIX-1, containing waste plastic oil, waste tire oil, and waste engine oil (mass fractions of 40%, 30%, and 30%, respectively), and introduces it from the inferior oil product feed tank into the pretreatment subsystem via gravity transport. The subsystem then performs impurity removal treatment via a hydrotreating subsystem, which loads an inferior oil product hydrotreating catalyst (PHT-01 hydrotreating catalyst is used in this embodiment) to process the inferior oil product. The volume hourly space velocity (VHSV) of the hydrotreating subsystem is 2.0 h⁻¹. -1 The hydrotreating subsystem operates at a pressure of 8.5 MPa and a reaction temperature of 700 K. After the reaction is complete, the treated oil is pumped out of the pretreatment subsystem while undergoing quality monitoring. The treated oil is designated POST-1. The properties of the resulting POST-1 are shown in Table 1.

[0058] Example 3

[0059] use Figure 1 The system shown uses a mixed oil product, denoted as MIX-2, containing waste tire oil, waste engine oil, and low-quality crude oil (mass fractions of 50%, 25%, and 25%, respectively), which is pneumatically conveyed from the low-quality oil product tank into the pretreatment subsystem. The pretreatment subsystem then performs impurity removal treatment using a microwave treatment subsystem. The microwave treatment subsystem has an electrical efficiency of 95%, a pressure of 8.5 MPa, and a reaction temperature of 500 K. After the reaction is complete, the treated oil is pneumatically discharged from the pretreatment subsystem, while quality monitoring is performed simultaneously. This treated oil is denoted as POST-2. The properties of the resulting treated oil product POST-1 are shown in Table 1.

[0060] Table 1 Properties of Inferior Oil Products Before and After Treatment

[0061] Serial number Density, g / cm 3 ]] Chlorine content (ug / g) MIX-1 0.9212 1179 POST-1 0.8923 1.7 MIX-2 0.9357 146 POST-2 0.9264 2.5

[0062] As can be seen from the data in the table above, the system provided by this invention has a very good dechlorination effect when treating inferior oil products.

[0063] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the claims of this utility model.

Claims

1. A pretreatment system for substandard oil products, characterized in that, It includes a raw material inlet subsystem, a pretreatment subsystem, and an oil product outlet subsystem that are connected in sequence; The pretreatment subsystem includes at least one of an electric field treatment subsystem, a microwave treatment subsystem, and a hydrogenation treatment subsystem.

2. The substandard oil pretreatment system as described in claim 1, characterized in that, The pretreatment subsystem includes any two of the electric field treatment subsystem, microwave treatment subsystem, and hydrogenation treatment subsystem, which are connected in parallel or in series in any order.

3. The substandard oil pretreatment system as described in claim 1, characterized in that, The pretreatment subsystem includes an electric field treatment subsystem, a microwave treatment subsystem, and a hydrogenation treatment subsystem, which are connected in parallel or series in any order.

4. The substandard oil pretreatment system as described in claim 1, characterized in that, The substandard oil is selected from any one of waste plastic oil, waste tire oil, waste engine oil, or substandard crude oil.

5. The substandard oil pretreatment system as described in claim 4, characterized in that, The waste tire oil is selected from any one of high-alkane waste tire oil and high-aromatic waste tire oil; the waste engine oil is selected from any one of waste synthetic lubricating oil and waste mineral lubricating oil; the inferior crude oil is selected from any one of heavy crude oil, sulfur-containing crude oil, high-sulfur crude oil, and high-acid crude oil.

6. The substandard oil pretreatment system as described in claim 1, characterized in that, It also includes a raw material pretreatment subsystem connected to the raw material inlet subsystem, the raw material pretreatment subsystem comprising a solid impurity removal subsystem and / or a pH adjustment subsystem connected in any order.

7. The substandard oil pretreatment system as described in claim 1, characterized in that, The raw material inlet subsystem and the oil outlet subsystem each independently include at least one of a conveying pump, a pneumatic conveying device, and a gravity conveying device.

8. The substandard oil pretreatment system as described in claim 1, characterized in that, It also includes a process control subsystem connected to each subsystem, the process control subsystem including pressure monitors and / or temperature monitors.

9. The substandard oil pretreatment system as described in claim 1, characterized in that, It also includes a quality monitoring subsystem connected to the oil product export subsystem, used to monitor at least one of the following: oil density, sulfur content, nitrogen content, total chlorine, inorganic chlorine, organic chlorine, and distillation range.

10. The substandard oil pretreatment system according to any one of claims 1-9, characterized in that, The raw material inlet subsystem and the oil product outlet subsystem are respectively equipped with a flow monitoring device and a flow control device.

Images