Raw material tank proportioning and feeding system

Abstract

The utility model relates to a raw material tank feeding system in the field of chemical industry, in particular to a raw material tank proportioning feeding system, which comprises a plurality of naphtha raw material tanks, a material auxiliary header pipe and a reactor, and each naphtha raw material tank is respectively connected with a tank outlet pipeline and a tank outlet adjusting pipeline. Tank outlet pipelines and tank outlet adjusting pipelines of a plurality of naphtha raw material tanks are connected to the auxiliary material header pipe, and the auxiliary material header pipe is connected to the reactor; and independent rotor flow meters and control valves are respectively arranged on the plurality of tank outlet adjusting pipelines. A tank outlet adjusting pipeline, a matched rotor flow meter and a control valve are additionally arranged on each naphtha raw material tank, and when a plurality of raw material tanks carry out simultaneous material loading due to different boiling points, crude oil can be blended and proportioned through the newly-configured rotor flow meter, so that the purposes of rapidly proportioning, optimizing refining, saving energy and being efficient are achieved. After transformation, device tower fluctuation caused by adjustment of the matching problem is avoided, the matching material amount can be rapidly adjusted, and the purpose of increasing yield and efficiency is really achieved.

Description

Technical Field

[0001] This utility model relates to a raw material tank feeding system in the chemical industry, specifically a raw material tank proportioning feeding system. Background Technology

[0002] Aromatics are raw materials for many important chemicals. The naphtha purchased from external sources is mostly straight-run naphtha. Due to the dispersed procurement locations, the composition of each raw material tank is different. When feeding the raw material tanks, multiple tank outlet valves need to be opened simultaneously for feeding because the crude oil boiling points are different. Furthermore, because the tank outlet valves have large pipe diameters and the gate valves are difficult to control the opening, the valves fluctuate greatly when adjusting them, making it impossible to quickly adjust the oil supply ratio. Moreover, the adjustment ratio can easily cause fluctuations in the fractionation tower, affecting production. Summary of the Invention

[0003] In view of the defects of the existing technology, the purpose of this utility model is to provide a raw material tank proportioning and feeding system, which reduces fluctuations through pipeline improvement and achieves the purpose of rapid proportioning of materials in the raw material tank.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a raw material tank proportioning and feeding system, comprising several naphtha raw material tanks, a feeding main pipe and a reactor, each naphtha raw material tank being connected to a tank outlet pipeline and a tank outlet regulating pipeline, the tank outlet pipelines and tank outlet regulating pipelines of the several naphtha raw material tanks being connected to the feeding main pipe, the feeding main pipe being connected to the reactor; and each of the several tank outlet regulating pipelines being provided with an independent rotor flow meter and a control valve.

[0005] Furthermore, the control valve includes a first valve, a check valve, and a second valve arranged in sequence.

[0006] Furthermore, the rotor flowmeter is positioned between the first valve and the check valve.

[0007] Furthermore, both the first valve and the second valve are manual valves.

[0008] Furthermore, the tank outlet regulating pipeline is a DN150 diameter pipeline.

[0009] Furthermore, a tank outlet valve is installed on the tank outlet pipeline, and the downstream of the tank outlet valve is connected to the inlet of the naphtha feedstock tank via a return pipeline, which is also equipped with a return valve.

[0010] Furthermore, the reactor is a fractionation tower.

[0011] Furthermore, a raw material pump is connected to the feed main pipe, through which the raw material in the feed main pipe is pumped out to the reactor.

[0012] Furthermore, a heating furnace is connected to the feed main pipe, and the heating furnace is located before the reactor inlet to heat the feed into the reactor.

[0013] Furthermore, the outlet pipeline and outlet regulating pipeline of each naphtha feed tank are connected to a separate feed branch pipe, and several of the feed branch pipes are connected to the feed main pipe.

[0014] The beneficial effects of this invention are as follows: The newly added tank outlet regulating pipeline on each naphtha feedstock tank, equipped with a rotor flowmeter and control valve, allows for simultaneous feeding from multiple feedstock tanks with different boiling points. This enables the blending and proportioning of crude oil through the newly added rotor flowmeter, achieving rapid proportioning, optimized refining, and energy efficiency. The modification avoids fluctuations in the unit tower caused by proportioning adjustments, and allows for rapid adjustment of the feedstock quantity, truly achieving the goal of increased production and efficiency. Attached Figure Description

[0015] Figure 1 Schematic diagram of the raw material tank proportioning and feeding system;

[0016] In the diagram: 1. Naphtha feed tank, 2. Feed main, 3. Fractionating tower, 4. Tank outlet pipeline, 5. Tank outlet regulating pipeline, 6. Feed pump, 7. Heating furnace, 8. First-hand valve, 9. Rotor flow meter, 10. Check valve, 11. Second-hand valve, 12. Tank outlet valve, 13. Return pipeline, 14. Return valve. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] When the device is operating normally, the raw material tanks in the tank area are supplied with raw material pumps. Because the oil products are purchased from various places, the distillation point composition is very different. Therefore, multiple tank groups are needed to adjust and mix the raw materials according to the sample distillation point. In this embodiment, two naphtha raw material tanks are used as an example for supplying raw materials. In actual production, the number of raw material tanks that supply raw materials at the same time is not fixed, and the pipelines can be arranged according to the technical solution of this utility model.

[0019] See appendix Figure 1A feedstock system for naphtha tank proportioning includes two naphtha feedstock tanks 1, a main feed pipe 2, and a fractionation tower 3. Each of the two naphtha feedstock tanks 1 is connected to a tank outlet pipeline 4 and a tank outlet regulating pipeline 5. Both the tank outlet pipelines 4 and the tank outlet regulating pipeline 5 are connected to the main feed pipe 2. The main feed pipe 2 is sequentially connected to a feedstock pump 6, a heater 7, and the fractionation tower 3. The feedstock pump 6 pumps the feedstock from the main feed pipe 2 to the fractionation tower 3 for fractionation. The heater 7 is located before the inlet of the fractionation tower 3 to heat the feedstock. Each tank outlet regulating pipeline 5 is sequentially equipped with a first manual valve 8, a rotor flowmeter 9, a one-way valve 10, and a second manual valve 11. The tank outlet regulating pipeline 5 has a diameter of DN150. A tank outlet valve 12 is installed on the tank outlet pipeline 4. The tank outlet valve 12 is connected to the inlet of the naphtha feedstock tank 1 via a return pipeline 13. A return valve 14 is installed on the return pipeline 13.

[0020] Based on the above technical solution, a small-diameter tank outlet regulating pipeline 5 is added to each naphtha feedstock tank 1 to facilitate control of the flow rate within the pipeline and achieve precise regulation. The tank outlet regulating pipeline 5 is equipped with a rotor flow meter 9 and two manual valves 8 and 11 before and after it. The opening degree of the manual valves can control the feed rate from the mixing tank, achieving precise mixing and avoiding large fluctuations in tower parameters caused by the mixing of oil products, thus ensuring stable production.

[0021] Furthermore, the tank outlet pipeline 4 and tank outlet regulating pipeline 5 of each naphtha feed tank 1 are connected to separate feed branch pipes, and several of the feed branch pipes are connected to the feed main pipe 2.

[0022] This utility model adds a DN150 diameter tank outlet regulating pipeline 5 to the raw material tank pipeline, equipped with front and rear hand valves of a rotor flow meter, and adds a one-way valve 10 to prevent cross-contamination of oil products when the liquid level of other tanks is high. When multiple tanks are feeding materials at the same time due to different boiling points, the crude oil can be blended and proportioned by the newly equipped rotor flow meter to achieve the purpose of rapid proportioning, optimized refining, energy saving and high efficiency.

[0023] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] The above-listed embodiments are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A raw material tank proportioning and feeding system, characterized in that: It includes several naphtha feed tanks, a main feed pipe, and a reactor. Each naphtha feed tank is connected to an outlet pipeline and an outlet regulating pipeline. The outlet pipelines and outlet regulating pipelines of the several naphtha feed tanks are all connected to the main feed pipe, which is connected to the reactor. Each of the several outlet regulating pipelines is equipped with an independent rotor flow meter and a control valve.

2. The raw material tank proportioning and feeding system according to claim 1, characterized in that: The control valve includes a first valve, a one-way valve, and a second valve arranged in sequence.

3. The raw material tank proportioning and feeding system according to claim 2, characterized in that: The rotor flow meter is positioned between the first valve and the check valve.

4. The raw material tank proportioning and feeding system according to claim 2, characterized in that: Both the first valve and the second valve are manual valves.

5. The raw material tank proportioning and feeding system according to claim 1, characterized in that: The tank outlet regulating pipeline is a DN150 diameter pipeline.

6. The raw material tank proportioning and feeding system according to claim 1, characterized in that: A tank outlet valve is installed on the tank outlet pipeline. The tank outlet valve is connected to the naphtha feedstock tank inlet via a return pipeline. A return valve is installed on the return pipeline.

7. The raw material tank proportioning and feeding system according to claim 1, characterized in that: The reactor is a fractionation tower.

8. A raw material tank proportioning and feeding system according to any one of claims 1-7, characterized in that: A raw material pump is connected to the feed main pipe, and the raw material in the feed main pipe is pumped out to the reactor by the raw material pump.

9. A raw material tank proportioning and feeding system according to any one of claims 1-7, characterized in that: A heating furnace is connected to the feed main pipe. The heating furnace is located before the reactor inlet and heats the feed into the reactor.

10. A raw material tank proportioning and feeding system according to any one of claims 1-7, characterized in that: Each naphtha feedstock tank's outlet line and outlet regulating line are connected to a separate feed branch line, and several of these feed branch lines are connected to the main feed line.

Images