Novel energy-saving and consumption-reducing processing device for light component C5-distillate oil

Abstract

The utility model relates to a novel energy-saving and consumption-reducing processing device for light component C5-distillate oil, which comprises at least one pentane removal unit, a gas-liquid separator, a steam stripping unit and a fractionation unit, one end of a connecting pipeline is connected to an oil return pipeline of the pentane removal unit, the other end of the connecting pipeline is connected to an oil inlet of the steam stripping unit, and the fractionation unit is connected to an oil outlet of the steam stripping unit. An oil outlet of the steam stripping unit is connected to an oil inlet of the fractionation unit, and the pentane removal unit is used for separating light component C5-distillate oil; the gas-liquid separator is used for further separating a mixture output by the pentane removal unit; the steam stripping unit is used for carrying out steam stripping treatment on the light component C5-distillate separated by the gas-liquid separator; and the fractionation unit is used for carrying out fine fractionation on the light component C5-distillate oil treated by the steam stripping unit. Compared with the prior art, the utility model not only reduces the equipment loss and the manual operation workload, but also saves the heat source steam at the bottom of the debutanizer and the power consumption of the pump, thereby achieving the purposes of energy conservation and consumption reduction.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel energy -conserving and consumption -reducing processing device of light component C5 -fraction oil belongs to the field of petrochemical technology. BACKGROUND

[0002] Catalytic reforming process is an important process for producing high octane gasoline components or aromatic hydrocarbons from light fraction, and the by-product hydrogen is an important source of hydrogen for hydrogenation devices. However, the catalytic reforming process design includes three design parts of catalytic reforming process flow, de-pentanizer, and de-pentanizer top condenser. In this process, the de-pentanizer equipment design is determined by calculating the number of trays, tower height, tower diameter and total tower efficiency through material balance, bubble dew point temperature, feed parameters, component relative volatility, minimum reflux ratio, etc.

[0003] Despite this, the prior art still has some drawbacks when processing light component C5 -fraction oil, such as large equipment wear and tear, large manual operation workload, and high energy consumption, which limits the efficiency and economic benefits of the process flow.

[0004] In addition, the process flow in the prior art is relatively complex, resulting in high operation difficulty, safety hazards, lack of flexibility, and difficulty in flexibly adopting different processing technologies according to product requirements, limiting the application range of the entire system and process. These problems not only affect production efficiency, but also increase production costs, which is contrary to the national green environmental protection requirements and the purpose of energy saving and consumption reduction. Therefore, the prior art needs a new energy-saving and consumption-reducing processing device of light component C5 -fraction oil that can simplify the process flow, reduce equipment wear and tear, reduce manual operation workload, and save energy consumption, to improve comprehensive economic benefits and respond to national green environmental protection requirements. SUMMARY

[0005] To overcome the defects of the prior art, the utility model provides a new energy-saving and consumption-reducing processing device of light component C5 -fraction oil, and the technical scheme of the utility model is:

[0006] A new energy-saving and consumption-reducing processing device of light component C5 -fraction oil, comprising: at least one de-pentanizing unit, a gas-liquid separator (9), a stripping unit, and a fractionating unit, one end of a connecting pipeline (7) is connected to the oil return pipeline of the de-pentanizing unit, and the other end is connected to the oil inlet of the stripping unit, the oil outlet of the stripping unit is connected to the oil inlet of the fractionating unit, the de-pentanizing unit is used for separating out light component C5 -fraction oil and performing preliminary cooling and separation; the gas-liquid separator (9) is used for further separating the mixture output by the de-pentanizing unit; the stripping unit is used for stripping the light component C5 -fraction oil separated by the gas-liquid separator (9); and the fractionating unit is used for fine fractionation of the light component C5 -fraction oil treated by the stripping unit.

[0007] Each of the de-pentane units comprises a de-pentane column (1), a de-pentane column air cooler (2), a de-pentane column reflux tank (3), a de-pentane column reflux pump (4), a first valve (5) and a second valve (6), the de-pentane column air cooler (2) is arranged on a pipeline between an upper port of the de-pentane column (1) and the de-pentane column reflux tank (3), the de-pentane column reflux pump (4) is arranged between a middle part of the de-pentane column (1) and the de-pentane column reflux tank (3), the connecting pipeline (7) is connected to an oil return pipeline communicated with the de-pentane column reflux pump (4), one end of the oil return pipeline is connected to the de-pentane column reflux pump (4), the other end is communicated with a middle part of the de-pentane column (1) of an adjacent de-pentane unit, the first valve (5) is arranged on the connecting pipeline (7), the second valve (6) is arranged on the oil return pipeline, and the first valve (5) and the second valve (6) are arranged adjacently.

[0008] The stripping unit comprises a stripping column (11), a stripping column air cooler (12), a stripping column reflux tank (13), a stripping column reflux pump (14), a stripping column reboiler pump (15) and a stripping column reboiler (16), the gas-liquid separator (9) is communicated with the connecting pipeline (7) through a gas-liquid separator pipeline, a third valve (8) is arranged on the connecting pipeline (7), and a fourth valve (10) is arranged on the gas-liquid separator pipeline; the upper port of the stripping column (11) is communicated with the stripping column reflux tank (13) through a stripping column reflux tank pipeline, the stripping column air cooler (12) is arranged on the stripping column reflux tank pipeline, and the stripping column reflux pump (14) is further arranged between the middle part of the stripping column (11) and the stripping column reflux tank (13); the stripping column reboiler (16) is arranged between the lower port of the stripping column (11) and the naphtha fractionating column (17) of the fractionating unit, one end of the stripping column reboiler pump (15) is connected to the lower port of the stripping column (11), and the other end is connected to a pipeline between the stripping column reboiler (16) and the naphtha fractionating column (17).

[0009] The fractionating unit comprises a naphtha fractionating column (17), a naphtha fractionating column reflux tank (18) and a naphtha fractionating column reflux pump (19), the upper port of the naphtha fractionating column (17) is communicated with the naphtha fractionating column reflux tank (18) through a pipeline, and the naphtha fractionating column reflux pump (19) is further arranged on the pipeline between the naphtha fractionating column reflux tank (18) and the naphtha fractionating column (17).

[0010] The utility model discloses the advantages are: not only reduce the equipment loss, reduce manual operation workload, save de -pentane column bottom heat source steam consumption simultaneously, thereby reach the purpose of energy saving and consumption reduction, respond the national green environmental protection requirement.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the main body structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] The advantages and characteristics of the present application will become more apparent with the description of specific embodiments. However, these embodiments are only exemplary and do not constitute any limitation on the scope of the present application. Those skilled in the art should understand that the details and forms of the technical solutions of the present application can be modified or replaced without deviating from the spirit and scope of the present application, and such modifications and replacements all fall within the protection scope of the present application.

[0013] Referring to Figure 1 The utility model relates to a kind of energy-saving and consumption-reducing processing device of novel light component C5- fraction oil, comprising: at least one de-pentane unit, gas-liquid separator 9, stripping unit and fractionating unit, one end of connecting pipeline 7 is connected to the oil return pipeline of the de-pentane unit, the other end is connected to the oil inlet of the stripping unit, the oil outlet of the stripping unit is connected to the oil inlet of the fractionating unit, the de-pentane unit is used to separate out light component C5- fraction oil, and preliminary cooling and separation are carried out;The gas-liquid separator 9 is used to further separate the mixture output by de-pentane unit;The stripping unit is used for stripping treatment to light component C5- fraction oil separated by gas-liquid separator 9;The fractionating unit is used for fine fractionation to light component C5- fraction oil after the treatment of stripping unit.

[0014] Based on the above scheme, the following advantages are achieved:

[0015] Process optimization: continuous and efficient material flow from the de-pentane unit to the fractionating unit is achieved, reducing intermediate links and improving overall processing efficiency.

[0016] Significant energy-saving effect: the optimized process reduces the consumption of heat energy and electric energy, especially in the use of de-butane tower bottom heat source steam, saving is achieved, which meets the current environmental protection trend of energy saving and emission reduction.

[0017] Consumption reduction and emission reduction: by reducing energy consumption and optimizing operating conditions, the consumption of raw materials and auxiliary materials is reduced, and the generation of waste and emissions is also reduced, which helps to reduce environmental pollution.

[0018] Improving product quality: the fine treatment of stripping unit and fractionating unit ensures the purity and quality of the final product, meeting the market demand for high-quality light component C5- fraction oil.

[0019] Each of the de-pentanizing units comprises a de-pentanizing column 1, a de-pentanizing column air cooler 2, a de-pentanizing column reflux tank 3, a de-pentanizing column reflux pump 4, a first valve 5 and a second valve 6, the de-pentanizing column air cooler 2 is installed on the pipeline between the upper port of the de-pentanizing column 1 and the de-pentanizing column reflux tank 3, the de-pentanizing column reflux pump 4 is installed between the middle part of the de-pentanizing column 1 and the de-pentanizing column reflux tank 3, the connecting pipeline 7 is connected to the oil return pipeline communicating with the de-pentanizing column reflux pump 4, one end of the oil return pipeline is connected to the de-pentanizing column reflux pump 4, the other end communicates with the middle part of the de-pentanizing column 1 of the adjacent de-pentanizing unit, the first valve 5 is installed on the connecting pipeline 7, and the second valve 6 is installed on the oil return pipeline, and the first valve 5 and the second valve 6 are arranged adjacently.

[0020] The components included in each de-pentanizing unit and the connection mode therebetween have the following advantages:

[0021] High cooling efficiency: The de-pentanizing column air cooler 2 is installed on the pipeline between the upper port of the de-pentanizing column 1 and the de-pentanizing column reflux tank 3, which can ensure that the hot oil flow from the top of the de-pentanizing column 1 is effectively cooled before entering the reflux tank 3, thereby improving the cooling efficiency.

[0022] Optimized reflux control: By installing the de-pentanizing column reflux pump 4 between the middle part of the de-pentanizing column 1 and the de-pentanizing column reflux tank 3, the flow and pressure of the reflux liquid can be accurately controlled, thereby optimizing the material balance and operation efficiency in the entire column.

[0023] Precise flow regulation: The first valve 5 and the second valve 6 are installed on the connecting pipeline 7 and the oil return pipeline respectively, which can accurately control the material flow, adjust the flow according to the production requirements, and improve the adaptability and operation flexibility of the system.

[0024] Reduced energy consumption: Through the optimized cooling and reflux system, energy consumption can be reduced, especially in the cooling and pumping process, which helps to achieve the goal of energy saving and consumption reduction.

[0025] The stripping unit includes a stripping tower 11, a stripping tower air cooler 12, a stripping tower reflux tank 13, a stripping tower reflux pump 14, a stripping tower reboiler pump 15, and a stripping tower reboiler 16. The gas-liquid separator 9 is connected to the connecting pipeline 7 through a gas-liquid separator pipeline, a third valve 8 is installed on the connecting pipeline 7, and a fourth valve 10 is installed on the gas-liquid separator pipeline. The upper port of the stripping tower 11 is connected to the stripping tower reflux tank 13 through a stripping tower reflux tank pipeline, the stripping tower air cooler 12 is installed on the stripping tower reflux tank pipeline, and a stripping tower reflux pump 14 is installed between the middle part of the stripping tower 11 and the stripping tower reflux tank 13. A stripping tower reboiler 16 is installed between the lower port of the stripping tower 11 and the naphtha fractionating tower 17 of the fractionation unit, one end of the stripping tower reboiler pump 15 is connected to the lower port of the stripping tower 11, and the other end is connected to the pipeline between the stripping tower reboiler 16 and the naphtha fractionating tower 17.

[0026] The design of the stripping unit has the following advantages:

[0027] Enhanced gas-liquid separation efficiency: The gas-liquid separator 9 is connected to the connecting pipeline 7 through a dedicated pipeline and controlled by the third valve 8 and the fourth valve 10, which helps to improve the efficiency and quality of gas-liquid separation.

[0028] Optimized cooling efficiency: The stripping tower air cooler 12 is installed on the stripping tower reflux tank pipeline, which can ensure that the hot gas from the top of the stripping tower 11 is effectively cooled before entering the stripping tower reflux tank 13, thereby improving the cooling efficiency.

[0029] Precise reflux control: By installing the stripping tower reflux pump 14 between the middle part of the stripping tower 11 and the stripping tower reflux tank 13, the flow and pressure of the reflux liquid can be accurately controlled, thereby optimizing the material balance and operating efficiency in the entire tower.

[0030] Efficient use of heat energy: The stripping tower reboiler 16 is installed between the lower port of the stripping tower 11 and the naphtha fractionating tower 17 of the fractionation unit, and the hot oil circulation is performed by the stripping tower reboiler pump 15, which helps to improve the efficiency of heat energy utilization and reduce energy consumption.

[0031] Improved product quality: Through the treatment of the stripping tower 11 and the stripping tower reboiler 16, hydrogen sulfide and trace water in the light component C5-distillate oil can be removed, improving the quality of the oil product.

[0032] The fractionation unit includes a naphtha fractionation column 17, a naphtha fractionation column reflux tank 18, and a naphtha fractionation column reflux pump 19. The upper port of the naphtha fractionation column 17 is connected to the naphtha fractionation column reflux tank 18 through a pipeline. The pipeline between the naphtha fractionation column 17 and the naphtha fractionation column reflux tank 18 is provided with the naphtha fractionation column reflux pump 19.

[0033] The design of the fractionation unit has the following advantages:

[0034] Improved fractionation efficiency: By setting the naphtha fractionation column reflux pump 19 between the naphtha fractionation column 17 and the naphtha fractionation column reflux tank 18, the flow rate of the reflux liquid can be accurately controlled, thereby improving the fractionation efficiency and product quality.

[0035] Optimized heat energy utilization: The design of the naphtha fractionation column reflux tank 18 helps to collect and reuse the liquid condensed from the top of the column. Through the naphtha fractionation column reflux pump 19, it is sent back to the column, realizing the optimized utilization of heat energy and reducing energy consumption.

[0036] Enhanced operational flexibility: The setting of the naphtha fractionation column reflux pump 19 allows the operator to adjust the reflux ratio according to actual production needs, enhancing the flexibility and adaptability of operation.

[0037] Improved product purity: Accurate reflux control helps to improve the separation effect of the fractionation column, thereby improving the purity of the product and market competitiveness.

[0038] The working principle of the utility model is:

[0039] De-pentane unit operation: The light component C5- distillate oil first enters the de-pentane unit, which includes a de-pentane column 1. The hot oil from the top of the de-pentane column 1 flows through a de-pentane column air cooler 2 for preliminary cooling. The cooled oil flows into a de-pentane column reflux tank 3 for gas-liquid separation. A de-pentane column reflux pump 4 sends part of the liquid phase from the reflux tank 3 back to the middle of the de-pentane column 1 as reflux to maintain the material balance in the column. First valve 5 and second valve 6 control the flow of connecting pipeline 7 and oil return pipeline, respectively, to ensure that the material flows as needed.

[0040] Gas-liquid separation: The mixture output from the de-pentane unit enters a gas-liquid separator 9 for further gas-liquid separation. Third valve 8 and fourth valve 10 control the fluid flow between gas-liquid separator 9 and connecting pipeline 7.

[0041] The stripped C5- fraction oil is sent to the stripping unit, which includes a stripping column 11, and a stripping column air cooler 12 to cool the gas at the top of the stripping column 11. A stripping column reflux pump 14 controls the liquid flow from the stripping column reflux tank 13 to the stripping column 11, and a stripping column reboiler pump 15 sends the naphtha at the bottom of the stripping column 11 to the stripping column reboiler 16 for heating, and then returns to the bottom of the stripping column 11 as a heat source, which helps to remove hydrogen sulfide and trace water in the stripped C5- fraction oil, and improves the oil quality.

[0042] The stripped C5- fraction oil is sent to the stripping unit, which includes a stripping column 11, and a stripping column air cooler 12 to cool the gas at the top of the stripping column 11. A stripping column reflux pump 14 controls the liquid flow from the stripping column reflux tank 13 to the stripping column 11, and a stripping column reboiler pump 15 sends the naphtha at the bottom of the stripping column 11 to the stripping column reboiler 16 for heating, and then returns to the bottom of the stripping column 11 as a heat source, which helps to remove hydrogen sulfide and trace water in the stripped C5- fraction oil, and improves the oil quality.

[0043] In the working process of the utility model, the C5- fraction oil is first condensed and cooled to 40 DEG C by the de-pentanizer air cooler 2 and the de-pentanizer top cooler, and then enters the de-pentanizer reflux tank 3 for gas-liquid separation.

[0044] The gas phase at the top of the de-pentanizer reflux tank 3 is sent to the inlet of the de-pentanizer air cooler 2 for further cooling, and the liquid phase at the bottom of the tank is divided into two parts: one part is sent back to the top of the de-pentanizer 1 as reflux under the flow and liquid level cascade control of the de-pentanizer reflux pump 4, so as to maintain the material balance in the tower; the other part is sent to the de-butanizer under the flow and tower sensitive plate temperature control.

[0045] The liquid phase sent to the de-butanizer enters the pre-hydrogenation stripping column 11 for feeding, and the stripping column top gas (containing light components, hydrogen sulfide and trace water) is condensed and cooled by the stripping column top air cooler 12 and the water cooler, and then enters the stripping column reflux tank 13; in the stripping column reflux tank 13, part of the liquid phase is pressurized by the stripping column reflux pump 14, and then returned to the stripping column 11 as reflux under the reflux tank liquid level and flow cascade control; the other part of the liquid phase is pressurized by the sulfur-containing liquefied gas external sending pump, and then sent to the desulfurization device for desulfurization treatment, and then transported to the spherical tank area.

[0046] The naphtha at the bottom of the stripping tower is mostly lifted by the stripping tower reboiler pump 15, and is returned to the bottom of the stripping tower as a heat source after being heated to 50% vaporization by the stripping tower reboiler 16 under flow control; the remaining naphtha is sent to the naphtha fractionating tower 17, and after the naphtha fractionating tower top gas is condensed and cooled to a liquid phase by heat exchange and air coolers, the naphtha fractionating tower top gas enters the naphtha fractionating tower reflux tank 18, the liquid phase is pumped up by the naphtha fractionating tower reflux pump 19, and then part of the liquid phase is returned to the tower as reflux under liquid level and total flow cascade control, and the remaining liquid phase is sent out of the device under tower top temperature and flow cascade control.

[0047] Compared with the prior art, the utility model not only reduces equipment loss and reduces manual operation workload, but also saves debutanizer bottom heat source steam and pump electricity consumption, so as to achieve the purpose of energy saving and consumption reduction, responds to the national green environmental protection requirement, effectively improves comprehensive economic benefit, and has the advantages of convenient operation.

[0048] The utility model realizes continuous and efficient material flow from the de-pentane unit to the fractionating unit; through accurate control and optimized operation conditions, energy consumption is reduced, raw material and auxiliary material consumption is reduced, and waste and emissions are reduced. The design of the device also improves product purity and quality, and meets market demand for high-quality light component C5- distillate oil.

[0049] The above only describes a preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A novel energy saving and consumption reducing processing unit for light ends C5- distillate oil characterized in that, The application comprises at least one depentanizer unit, a gas-liquid separator (9), a stripping unit and a fractionation unit, one end of a connecting pipeline (7) is connected to the oil return pipeline of the depentanizer unit, and the other end is connected to the oil inlet of the stripping unit, the oil outlet of the stripping unit is connected to the oil inlet of the fractionation unit, the depentanizer unit is used for separating light components C5- fraction oil and performing preliminary cooling and separation, the gas-liquid separator (9) is used for further separating the mixture output by the depentanizer unit, the stripping unit is used for stripping the light components C5- fraction oil separated by the gas-liquid separator (9), and the fractionation unit is used for fine fractionation of the light components C5- fraction oil processed by the stripping unit. Each depentanizer unit comprises a depentanizer column (1), a depentanizer column air cooler (2), a depentanizer column reflux tank (3), a depentanizer column reflux pump (4), a first valve (5) and a second valve (6), the depentanizer column air cooler (2) is installed on the pipeline between the upper port of the depentanizer column (1) and the depentanizer column reflux tank (3), the depentanizer column reflux pump (4) is installed between the middle part of the depentanizer column (1) and the depentanizer column reflux tank (3), the connecting pipeline (7) is connected to the oil return pipeline in communication with the depentanizer column reflux pump (4), one end of the oil return pipeline is connected to the depentanizer column reflux pump (4), and the other end is in communication with the middle part of the depentanizer column (1) of the adjacent depentanizer unit, the first valve (5) is installed on the connecting pipeline (7), the second valve (6) is installed on the oil return pipeline, and the first valve (5) and the second valve (6) are arranged adjacently.

2. A novel energy saving and consumption reducing processing unit for light component C5- fraction oil as claimed in claim 1, characterized in that, The stripping unit comprises a stripping column (11), a stripping column air cooler (12), a stripping column reflux tank (13), a stripping column reflux pump (14), a stripping column reboiler pump (15) and a stripping column reboiler (16), the gas-liquid separator (9) is in communication with the connecting pipeline (7) through a gas-liquid separator pipeline, a third valve (8) is installed on the connecting pipeline (7), and a fourth valve (10) is installed on the gas-liquid separator pipeline; the upper port of the stripping column (11) is in communication with the stripping column reflux tank (13) through a stripping column reflux tank pipeline, the stripping column air cooler (12) is installed on the stripping column reflux tank pipeline, and the stripping column reflux pump (14) is further installed between the middle part of the stripping column (11) and the stripping column reflux tank (13); the stripping column reboiler (16) is installed between the lower port of the stripping column (11) and a naphtha fractionation column (17) of the fractionation unit, one end of the stripping column reboiler pump (15) is connected to the lower port of the stripping column (11), and the other end is connected to the pipeline between the stripping column reboiler (16) and the naphtha fractionation column (17).

3. The energy saving and consumption reducing processing device for the novel light component C5- distillate oil according to claim 1 or 2, characterized in that, ​ 4. The energy saving and consumption reducing processing device for novel light component C5- distillate oil according to claim 3, characterized in that, The fractionating unit comprises a naphtha fractionating column (17), a naphtha fractionating column reflux tank (18) and a naphtha fractionating column reflux pump (19), the upper port of the naphtha fractionating column (17) is communicated with the naphtha fractionating column reflux tank (18) through a pipeline, and the pipeline between the naphtha fractionating column (17) and the naphtha fractionating column reflux tank (18) is additionally provided with the naphtha fractionating column reflux pump (19).

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