Automatic benzene filling pipeline

Abstract

The invention provides an automatic benzene filling pipeline which comprises a material barrel, a diaphragm pump connected with the material barrel and used as power, a feeding pipe connected with a discharging opening of the diaphragm pump and a head tank connected with the feeding pipe. The device further comprises an inlet pneumatic valve arranged at the joint of the feeding pipe and the head tank, a discharging valve used for discharging is arranged at the bottom of the head tank, a pressure gauge used for detecting pressure is arranged on the surface of the head tank, when the internal pressure of the head tank is insufficient, the inlet pneumatic valve is opened, the diaphragm pump introduces benzene into the head tank, and the internal pressure of the head tank is detected through the pressure gauge; when the pressure is lower than the lower limit set value, the inlet pneumatic valve is opened, the diaphragm pump is started, the benzene liquid is supplemented to the head tank from the material barrel, the nitrogen system automatically supplements nitrogen through the self-operated regulating valve to maintain the set back pressure, automation, safety and stability of the benzene filling process are achieved, manual operation is reduced, safety risks are reduced, and the production efficiency is improved. And the feeding reliability is improved.

Description

Technical Field

[0001] This invention relates to the field of boilers, and more particularly to an automated benzene filling pipeline. Background Technology

[0002] Benzene, as an important chemical raw material and fuel, has a wide range of applications in industrial production, such as as fuel for some boilers or heating furnaces. However, benzene is a typical flammable, explosive, and volatile hazardous chemical. Its vapor can form an explosive mixture with air, posing significant safety risks during production, storage, and transportation. Therefore, extremely high requirements are placed on the safety, sealing, and operational reliability of equipment systems, especially pipeline systems, that involve benzene handling.

[0003] However, existing benzene delivery systems have significant shortcomings in terms of safety, automation level, and operational reliability, making it difficult to meet the requirements of modern chemical production for intrinsic safety, continuous and stable operation, and intelligent control. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes an automated benzene filling pipeline.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an automated benzene filling pipeline, comprising: a material tank, a diaphragm pump connected to the material tank for use as power, an inlet pipe connected to the outlet of the diaphragm pump, and a high-level tank connected to the inlet pipe; It also includes an inlet pneumatic valve installed at the connection between the feed pipe and the high-level tank. The bottom of the high-level tank is equipped with a discharge valve for discharging material. The surface of the high-level tank is equipped with a pressure gauge to detect pressure. When the pressure inside the high-level tank is insufficient, the inlet pneumatic valve opens and the diaphragm pump introduces benzene into the high-level tank.

[0006] Preferably, the surface of the high-level tank is provided with a nitrogen pipe for supplying nitrogen.

[0007] Preferably, the surface of the nitrogen pipe is provided with a self-regulating valve, and a front pressure valve and a rear pressure valve for detecting pressure are provided on both sides of the self-regulating valve.

[0008] Preferably, a ball valve is provided at the connection point between the nitrogen pipe and the high-level tank, and a check valve is provided at one end of the ball valve.

[0009] Preferably, the surface of the high-level tank is provided with a drain valve.

[0010] Preferably, a temperature transmitter is provided on the surface of the high-level tank.

[0011] Preferably, the surface of the high-level tank is provided with an exhaust pipe, and the surface of the exhaust pipe is provided with a safety valve.

[0012] Compared with the prior art, the beneficial effects of the present invention include: by detecting the internal pressure of the high-level tank with a pressure gauge, when the pressure is lower than the lower limit set value, the inlet pneumatic valve is opened and the diaphragm pump is started to replenish benzene liquid from the material tank to the high-level tank; the nitrogen system automatically replenishes nitrogen through a self-regulating valve to maintain the set back pressure, thereby realizing the automation, safety and stability of the benzene filling process, reducing manual operation, reducing safety risks and improving the reliability of material supply. Attached Figure Description

[0013] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 The diagram illustrates the structure of an automated benzene filling pipeline according to one embodiment of the present invention.

[0014] Figure 2 This illustration schematically shows one embodiment of the invention. Figure 1 A schematic diagram of the structure of part A.

[0015] The following are labeled in the diagram: 1. Material bucket; 2. Diaphragm pump; 3. Feed pipe; 4. High-level tank; 5. Nitrogen pipe; 6. Exhaust pipe; 7. Inlet pneumatic valve; 8. Level gauge; 9. Drain valve; 10. Discharge valve; 11. Temperature transmitter; 12. Pressure gauge; 13. Ball valve; 14. Check valve; 15. Self-regulating valve; 16. Front pressure valve; 17. Rear pressure valve; 18. Safety valve; Detailed Implementation

[0016] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0018] Example 1 This invention provides an automated benzene filling pipeline, which aims to achieve a safe, stable and automated supply of benzene to benzene-using equipment such as boilers, while also having functions such as pressure maintenance, nitrogen protection and safe venting.

[0019] like Figures 1-2As shown, the automated benzene filling pipeline mainly includes a material tank 1, a diaphragm pump 2, a feed pipe 3, an elevated tank 4, and related valves, instruments, and safety devices.

[0020] Material tank 1 is used to store benzene raw material to be transported. Its outlet is connected to the inlet of diaphragm pump 2 through a pipeline. Diaphragm pump 2 serves as the power source of the system and is responsible for drawing benzene from material tank 1 and pressurizing and transporting it. The outlet of diaphragm pump 2 is connected to feed pipe 3, and the other end of feed pipe 3 is connected to the upper feed port of high-level tank 4.

[0021] To achieve automated benzene replenishment, an inlet pneumatic valve 7 is installed at the connection between the feed pipe 3 and the high-level tank 4. A pressure gauge 12, preferably a pressure transmitter with an electrical signal output, is installed on the surface of the high-level tank 4 to detect the internal gas pressure. When the pressure gauge 12 detects that the internal pressure of the high-level tank 4 is lower than the preset process requirement value, the control system will issue a command to open the inlet pneumatic valve 7 and start the diaphragm pump 2. At this time, the diaphragm pump 2 pumps benzene material into the high-level tank 4 through the feed pipe 3 until the internal pressure returns to the set value. Then, the inlet pneumatic valve 7 closes and the diaphragm pump 2 stops running, thus realizing closed-loop control of automatic replenishment according to pressure requirements.

[0022] The bottom of the high-level tank 4 is equipped with a discharge valve 10, which is connected to a downstream boiler or other benzene-using equipment through a pipeline. It is used to supply benzene to the boiler when needed. The opening and closing of the discharge valve 10 can be operated manually or automatically controlled according to the demand signal of the boiler.

[0023] Example 2 To ensure that benzene in the high-level tank 4 is protected by an inert gas during storage and transportation and to maintain a stable system pressure, a nitrogen pipe 5 is also provided on the surface of the high-level tank 4. The nitrogen pipe 5 is used to connect to an external nitrogen source and fill the gas phase space of the high-level tank 4 with nitrogen to isolate air and prevent benzene vapor from forming an explosive mixture with air.

[0024] In a preferred embodiment, a ball valve 13 and a check valve 14 are connected in series on the nitrogen pipe 5. The ball valve 13 is used to manually cut off or connect the nitrogen supply for maintenance or emergency isolation, while the check valve 14 is used to prevent the medium in the high-level tank 4 from flowing back into the nitrogen pipe 5, thus protecting the cleanliness and safety of the nitrogen supply system.

[0025] To further achieve automatic and stable control of nitrogen pressure, a self-regulating valve 15 is also installed on the nitrogen pipe 5. This valve does not require external power and uses the pressure change of the regulated medium (nitrogen) itself to drive the valve core and automatically adjust the opening. A front pressure valve 16 and a rear pressure valve 17 are respectively provided on the inlet and outlet sides of the self-regulating valve 15 to monitor the nitrogen pressure before and after the regulating valve, so as to facilitate on-site observation of the working status of the regulating valve and to perform initial setting and debugging. The self-regulating valve 15 can automatically stabilize the nitrogen pressure supplied to the high-level tank 4 within the set range required by the process.

[0026] To facilitate the cleaning of impurities or moisture that may accumulate at the bottom of the high-level tank 4, a drain valve 9 is provided at the bottom of the high-level tank 4.

[0027] In order to monitor the temperature of benzene material, a temperature transmitter 11 is installed on the surface of the high-level tank 4. The temperature transmitter 11 can transmit the temperature signal to the control room for process monitoring, interlocking or temperature compensation calculation to ensure operational safety.

[0028] To ensure the safety of the system under overpressure conditions, the surface of the high-level tank 4 is connected to an exhaust pipe 6, which normally leads to a safe discharge system. A safety valve 18 is installed on the exhaust pipe 6. When the pressure inside the high-level tank 4 exceeds the safety set value due to a malfunction, the safety valve 18 will automatically open to discharge the overpressure gas through the exhaust pipe 6, thereby protecting the safety of the container and pipeline system.

[0029] During normal operation, the high-level tank 4 is filled with an appropriate amount of benzene liquid, and a certain nitrogen back pressure is maintained through the nitrogen pipe 5. When the boiler needs benzene, the discharge valve 10 is opened, and benzene flows out under the action of nitrogen pressure. As the benzene liquid flows out or the ambient temperature changes, the pressure in the high-level tank 4 drops. The pressure gauge 12 monitors this pressure in real time. When the pressure is lower than the lower limit set value, the control system automatically opens the inlet pneumatic valve 7 and starts the diaphragm pump 2 to replenish benzene liquid from the material tank 1 to the high-level tank 4 until the pressure is restored. The nitrogen system automatically replenishes nitrogen through the self-regulating valve 15 to maintain the set back pressure. Throughout the process, the temperature and pressure can be monitored, and a safety valve 18 is provided as the final overpressure protection.

[0030] Through the above-described structure, this invention achieves automation, safety, and stability in the benzene filling process, reduces manual operation, lowers safety risks, and improves the reliability of material supply.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An automated benzene filling pipeline, characterized by, Include: Material bucket (1), with material bucket (1) connected to the diaphragm pump (2) as power, with diaphragm pump (2) discharge port connected to the feed pipe (3) and with feed pipe (3) connected to the high tank (4); It also includes the inlet pneumatic valve (7) provided at the connection between the feed pipe (3) and the high tank (4), the bottom of the high tank (4) is provided with a discharge valve (10) for discharging, the surface of the high tank (4) is provided with a pressure gauge (12) for detecting pressure, when the internal pressure of the high tank (4) is insufficient, the inlet pneumatic valve (7) is opened, and the diaphragm pump (2) introduces benzene into the high tank (4).

2. An automated benzene filling conduit according to claim 1, characterized in that, The surface of the high tank (4) is provided with a nitrogen pipe (5) for supplying nitrogen.

3. An automated benzene filling conduit according to claim 2, characterized in that, The surface of the nitrogen pipe (5) is provided with a self-operated regulating valve (15), and the two sides of the self-operated regulating valve (15) are provided with a front pressure valve (16) and a rear pressure valve (17) for detecting pressure.

4. An automated benzene filling conduit according to claim 2, characterized in that, The position where the nitrogen pipe (5) is connected with the high tank (4) is provided with a ball valve (13), one end of the ball valve (13) is provided with a check valve (14).

5. An automated benzene filling conduit according to claim 1, characterized in that, The surface of the high tank (4) is provided with a blowdown valve (9).

6. An automated benzene filling conduit according to claim 1, characterized in that, The surface of the high tank (4) is provided with a temperature transmitter (11).

7. An automated benzene filling conduit according to claim 1, characterized in that, The surface of the high tank (4) is provided with a waste gas pipe (6), and the surface of the waste gas pipe (6) is provided with a safety valve (18).

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