Ethylene tar storage and conveying structure

Abstract

The utility model discloses an ethylene tar storing and conveying structure which comprises an oil storage tank and an oil drainage pool, the oil drainage pool comprises an oil pool oil inlet pipe, the oil storage tank comprises an oil inlet pipe, the oil inlet pipe extends into the oil drainage pool, the oil inlet pipe is connected with an oil pump, and the oil storage tank and the oil drainage pool are both connected with a negative pressure system. The ethylene tar conveying efficiency is improved, and the energy loss and pollution are reduced.

Description

Technical Field

[0001] The present invention belongs to the field of tar transportation. Specifically, the present invention relates to an ethylene tar storage and transportation structure. Background Art

[0002] In the current ethylene tar combustion system, ethylene tar is stored in an oil storage tank. In the processes of loading, unloading, storage, and use, steam is used for heating to maintain a low viscosity for easy pipeline transportation and full combustion. Since it is not used in a closed manner, ethylene tar is exposed to the air, and when steam is used for heating, heavy aromatic hydrocarbon gases will be released. If discharged into the air, it will cause energy waste and environmental pollution. If not discharged, when it reaches a certain value, there will be certain potential safety hazards.

[0003] The invention patent with the publication number CN106811223A was publicly disclosed on June 9, 2017, with the name of a tar treatment method and treatment device. The tar treatment device includes a first container, a second container, and a transportation system. Heating devices and discharge pipes are provided on both the first container and the second container, and the transportation system is connected to the second container. This tar treatment method and treatment device cannot improve the transportation efficiency of ethylene tar, nor can it reduce energy consumption and pollution. Summary of the Invention

[0004] The purpose of the present invention is to provide an ethylene tar storage and transportation structure that can improve the transportation efficiency of ethylene tar, reduce energy consumption and pollution, aiming at the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] This ethylene tar storage and transportation structure includes an oil storage tank and an oil drain pit. The oil drain pit includes an oil pool inlet pipe, and the oil storage tank includes an inlet pipe. The inlet pipe extends into the oil drain pit and is connected to an oil pump. Both the oil storage tank and the oil drain pit are connected to a negative pressure system.

[0007] The negative pressure system includes an induced draft fan, which is connected to a main negative pressure pipe. The oil drain pit is connected to a first negative pressure pipe, and the oil storage tank is connected to a second negative pressure pipe. Both the first negative pressure pipe and the second negative pressure pipe are connected to the main negative pressure pipe.

[0008] The negative pressure system further includes a desulfurization and denitrification air duct, which is connected to the main negative pressure pipe. Both ends of the desulfurization and denitrification air duct are respectively connected to a melting furnace and a chimney, and the induced draft fan, the melting furnace, the desulfurization and denitrification air duct, and the chimney are arranged in sequence.

[0009] A three-way valve is provided at the top of the oil storage tank. The upper end of the inlet pipe and the upper end of the second negative pressure pipe are both connected to the three-way valve. The bottom end of the first negative pressure pipe is located at the upper part inside the oil drain pit, and the inlet pipe extends to the bottom of the oil drain pit.

[0010] Steam heating devices are provided at the bottoms of both the oil storage tank and the oil drain pit.

[0011] Valves are provided on the inlet pipe, the oil pit inlet pipe, and the first negative pressure pipe.

[0012] Blowdown gate valves are provided on both the first negative pressure pipe and the second negative pressure pipe.

[0013] A flow regulating valve and a negative pressure gauge are provided on the main negative pressure pipe.

[0014] A flexible connection is further provided on the inlet pipe, and the flexible connection is located between the oil pump and the oil drain pit.

[0015] Fixed brackets are provided at equal intervals on the side of the oil storage tank, and a protective fence is provided at the upper end of the oil storage tank.

[0016] The technical effect of the present invention is as follows: By adopting the ethylene tar storage and transportation structure of the present invention, negative pressure pipelines are installed in the oil storage tank and the oil drain pit, and by utilizing the negative pressure air inlet function of the induced draft fan, the heavy aromatic hydrocarbon gas separated from the oil storage tank and the oil drain pit is discharged, the recovery and utilization of the heavy aromatic hydrocarbon gas are realized, energy is fully utilized, and at the same time, the safety hazard of excessive pressure caused by the inability to discharge the heavy aromatic hydrocarbon gas is eliminated. During the storage and transportation of ethylene tar, the transportation efficiency is improved, and at the same time, the closed use of ethylene tar in the loading, unloading, storage, use and other links is realized, avoiding the pollution caused by the exposure of ethylene tar to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, and the shown contents are respectively:

[0018] Figure 1 It is a schematic structural diagram of the ethylene tar storage and transportation structure of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the connection between the oil drain pit and the pipeline of the present invention;

[0020] Figure 3 It is a schematic diagram of the top structure of the oil storage tank of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the whole oil storage tank of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the negative pressure system of the present invention.

[0023] The marks in the figure are: 1, inlet pipe; 2, oil pit inlet pipe; 3, oil pump; 4, first negative pressure pipe; 5, second negative pressure pipe; 6, main negative pressure pipe; 7, fixed bracket; 8, protective fence; 9, three-way valve; 10, steam heating device; 11, blowdown gate valve; 12, flow regulating valve; 13, negative pressure gauge; 14, flexible connection. Detailed implementation manners

[0024] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings through the description of embodiments, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention and facilitate its implementation.

[0025] As Figure 1 shown, the ethylene tar storage and transportation structure includes an oil storage tank and an oil drain pit. The oil drain pit includes an oil tank inlet pipe 2. The oil storage tank includes an inlet pipe 1. The inlet pipe 1 extends into the oil drain pit. The inlet pipe 1 is connected to an oil pump 3. Both the oil storage tank and the oil drain pit are connected to a negative pressure system. The oil storage tank is used to store ethylene tar. The oil drain pit is used to temporarily store the ethylene tar discharged from the oil tanker. The oil pump 3 is located in the oil pump 3 room. The oil pump 3 provides power for transporting ethylene tar from the oil drain pit to the oil storage tank. For the loading and unloading of ethylene tar, an oil tanker is used for closed transportation, which is relatively safe and environmentally friendly. During the loading and unloading process, a steel wire hose or a rubber hose is required to connect the loading and unloading oil pits and the oil tanker in a closed manner, and then the loading and unloading operation is carried out. After the loading and unloading are completed, the inlet and outlet valves of the loading and unloading oil pits are closed to achieve a fully closed operation.

[0026] A negative pressure system is arranged between the oil storage tank and the oil drain pit. After installing the ethylene tar negative pressure pipeline for both of them, the oil drain pit and the oil storage tank can be designed as a closed structure. During the loading, unloading, storage, use and other links of ethylene tar, the transportation of ethylene tar will not be affected by the closed structure, avoiding the exposure of ethylene tar to the air and preventing environmental pollution and affecting air quality. Since when ethylene tar is stored in the oil storage tank, heavy aromatic hydrocarbon gas will be precipitated during steam heating. After the heavy aromatic hydrocarbon gas reaches a certain value, there are certain safety hazards. After installing the negative pressure pipeline, the heavy aromatic hydrocarbon gas will be timely transported to the melting furnace or boiler for combustion. A small amount of heat can be generated during combustion, making full use of energy and eliminating safety hazards at the same time.

[0027] As Figure 2 and Figure 5As shown in the figure, the negative pressure system further includes a desulfurization and denitrification air duct, which is connected to the main negative pressure pipe 6. Both ends of the desulfurization and denitrification air duct are respectively connected to a melting furnace and a chimney, and the induced draft fan, the melting furnace, the desulfurization and denitrification air duct, and the chimney are arranged in sequence. The induced draft fan is connected to the boiler or the melting furnace. The induced draft fan draws air to form a negative pressure, providing power for the discharge of heavy aromatic hydrocarbons gas and accelerating the transportation efficiency of ethylene tar. The first negative pressure pipe 4 serves as the ventilation port of the oil drain pit, and the second negative pressure pipe 5 serves as the ventilation port of the oil storage tank, meeting the overflow of heavy aromatic hydrocarbons gas, avoiding potential safety hazards caused by excessive pressure of heavy aromatic hydrocarbons gas, facilitating the unified management and recovery of heavy aromatic hydrocarbons gas using the negative pressure pipe, reducing energy consumption, connecting the oil storage tank and the oil drain pit to the induced draft fan through pipelines. Since the air inlet of the induced draft fan sucks air inward, a negative pressure pipeline is formed, smoothly transporting the heavy aromatic hydrocarbons gas in the oil storage tank and the oil drain pit to the melting furnace or the boiler. The negative pressure pipe is a galvanized pipe with anti-corrosion performance, which can effectively extend the service life of the pipeline.

[0028] As Figure 2 and Figure 5 As shown in the figure, the negative pressure system further includes a desulfurization and denitrification air duct, which is connected to the main negative pressure pipe 6. Both ends of the desulfurization and denitrification air duct are respectively connected to a melting furnace and a chimney, and the induced draft fan, the melting furnace, the desulfurization and denitrification air duct, and the chimney are arranged in sequence. The two branch pipes of the main negative pressure pipe 6 are respectively connected to the induced draft fan and the desulfurization and denitrification air duct. The desulfurization and denitrification air duct can reduce the harmful substances in the heavy aromatic hydrocarbons gas, reduce pollution, and meet the emission standards. Valves are also set on the branch pipes of the main negative pressure pipe 6 to control its on-off. The collected heavy aromatic hydrocarbons gas is introduced into the melting furnace for combustion or directly into the desulfurization and denitrification air duct, thus meeting the production requirements under different conditions. If the heavy aromatic hydrocarbons gas enters the melting furnace for combustion through the induced draft fan, it can provide energy for production, and the flue gas after combustion will pass through the desulfurization and denitrification air duct and the chimney in sequence to achieve desulfurization and denitrification and then be discharged; if the heavy aromatic hydrocarbons gas directly enters the desulfurization and denitrification air duct, it will be directly desulfurized and denitrified and then discharged.

[0029] As Figure 3 As shown in the figure, a three-way valve 9 is provided at the top of the oil storage tank. The upper ends of the oil inlet pipe 1 and the second negative pressure pipe 5 are both connected to the three-way valve 9; the bottom end of the first negative pressure pipe 4 is located at the upper end inside the oil drain pit, and the oil inlet pipe 1 extends to the bottom of the oil drain pit. By setting the three-way valve 9, both the oil inlet and the discharge port of heavy aromatic hydrocarbons gas of the oil storage tank are arranged at the top of the oil storage tank. Since the heavy aromatic hydrocarbons gas will accumulate or overflow from the upper end of the oil storage tank, using negative pressure to extract the heavy aromatic hydrocarbons gas in the oil storage tank can achieve the effect of saving energy. The oil inlet is located at the top of the oil storage tank, which can avoid the situation where the oil pressure in the oil storage tank is too high and the oil cannot be inlet. Since heavy aromatic hydrocarbons gas will also precipitate in the oil drain pit, setting the first negative pressure pipe 4 in the above structure can facilitate the extraction of heavy aromatic hydrocarbons gas. The oil inlet pipe 1 extends to the bottom of the oil drain pit, which can extract the ethylene tar in the oil drain pit more completely.

[0030] As Figure 2and Figure 4 As shown in Figure 4 , steam heating devices 10 are provided at the bottoms of the storage oil tank and the oil drain pit. The steam heating device 10 can adjust the temperature of the vinyl tar in the storage oil tank and the oil unloading pit, and is used to keep the vinyl tar at a low viscosity, improve the fluidity of the vinyl tar during transportation and use, and improve the transportation efficiency.

[0031] As Figure 2 As shown in Figure 2 , valves are provided on the inlet pipe 1, the oil pit inlet pipe 2, and the first negative pressure pipe 4. By setting valves on the above pipelines to control the on-off, the flow path of the vinyl tar can be switched according to the situation to meet the loading, unloading, and transportation of the vinyl tar.

[0032] As Figure 2 and Figure 4 As shown in Figure 2 and Figure 4 , sewage gate valves 11 are provided on the first negative pressure pipe 4 and the second negative pressure pipe 5. The sewage gate valve 11 is installed at the lowest position of the above pipeline to prevent the water vapor in the vinyl tar from solidifying into water and blocking the pipeline, ensuring the smoothness of the pipeline.

[0033] As Figure 2 As shown in Figure 2 , a flow regulating valve 12 and a negative pressure gauge 13 are provided on the main negative pressure pipe 6. The above structure is used to monitor and regulate the flow rate and pressure of the heavy aromatic hydrocarbon gas.

[0034] As Figure 2 As shown in Figure 2 , a flexible connection 14 is also provided on the inlet pipe 1, and the flexible connection 14 is located between the oil pump 3 and the oil drain pit. Using the flexible connection 14 can reduce the disturbance generated by the operation of the oil pump 3 on the pipeline and improve the pipeline stability.

[0035] As Figure 4 As shown in Figure 4 , fixed brackets 7 are provided at equal intervals on the side of the storage oil tank, and a guardrail 8 is provided at the upper end of the storage oil tank. A plurality of fixed brackets 7 are provided to fix the inlet pipe 1 or the negative pressure pipe to improve its stability. The guardrail 8 is used to improve the safety of maintenance personnel during operation.

[0036] When the oil tanker is unloading oil, the valve of the oil pool oil inlet pipe 2 is opened, the valve of the first negative pressure pipe 4 is opened, and the oil pool oil inlet pipe 2 is connected to the oil tanker with a wire hose or a rubber hose. The oil tanker is equipped with an oil pump 3. After starting, the ethylene tar in the oil tanker is pumped to the oil unloading pool. Since the oil unloading pool is closed, the oil unloading pool is connected to the air inlet of the induced draft fan or the desulfurization and denitration air duct through the first negative pressure pipe 4. The air inlet flow of the induced draft fan and the desulfurization and denitration air duct is much larger than the flow of the oil pool oil inlet pipe 2. It is easy to form a vacuum in the oil unloading pool and the oil pool oil inlet pipe 2. Negative pressure is formed. When the ethylene tar in the tanker is pumped into the oil unloading pool, the ethylene tar occupies the space of the oil unloading pool and the heavy aromatic gas is pumped out. The inside of the oil unloading pool is negative pressure, and the ethylene tar can enter the oil unloading pool smoothly. At the same time, the harmful heavy aromatic gas will be transported by the negative pressure pipe to the air inlet of the induced draft fan or the desulfurization and denitrification air duct to complete the combustion or desulfurization and denitrification treatment. Due to the use of fully enclosed pipelines, environmental pollution is completely eliminated. The flue gas generated after combustion will pass through the desulfurization and denitrification device and enter the atmosphere after meeting the national emission standards.

[0037] When the ethylene tar in the oil unloading pool is transported to the oil storage tank by the oil pump 3, the valve of the oil pool oil inlet pipe 2 is closed, the valves of the first negative pressure pipe 4 and the oil inlet pipe 1 are opened, and the oil pump 3 is started to transport the ethylene tar in the oil unloading pool to the oil storage tank along the oil inlet pipe 1. Since the oil storage tank is closed, and the air outlet at the upper end of the oil storage tank is connected to the air inlet of the induced draft fan and the desulfurization and denitrification air duct, and the air inlet flow of the induced draft fan or the desulfurization and denitrification air duct is much larger than the flow of the oil inlet pipe 1, a negative pressure is formed in the oil storage tank and the oil inlet pipe 1. When the ethylene tar in the oil unloading pool is pumped into the oil storage tank, the ethylene tar occupies the space of the oil storage tank, and at the same time, the heavy aromatic gas in the oil storage tank is pumped out, the inside of the oil storage tank is negative pressure, and the ethylene tar can smoothly enter the oil storage tank, and the heavy aromatic gas discharge treatment method is the same as above.

[0038] The ethylene tar storage and transportation structure, by installing negative pressure pipes in the oil storage tank and the oil leakage pool and utilizing the negative pressure air intake effect of the induced draft fan, realizes the discharge of heavy aromatic gases precipitated from the oil storage tank and the oil leakage pool, realizes the recovery and utilization of heavy aromatic gases, fully utilizes energy, and eliminates the potential safety hazard of excessive pressure caused by the inability to discharge heavy aromatic gases. During the storage and transportation of ethylene tar, the transportation efficiency is improved, and the closed use of ethylene tar in the links of loading and unloading, storage, and use is realized, avoiding the pollution caused by exposure of ethylene tar to the outside world.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An ethylene tar storage and transportation structure, characterized in that: The invention comprises an oil storage tank and an oil drain pool, wherein the oil drain pool comprises an oil pool oil inlet pipe (2), the oil storage tank comprises an oil inlet pipe (1), the oil inlet pipe (1) extends into the oil drain pool, the oil inlet pipe (1) is connected to an oil pump (3), and the oil storage tank and the oil drain pool are both connected to a negative pressure system.

2. The ethylene tar storage and transportation structure according to claim 1, characterized in that: The negative pressure system comprises an induced draft fan, the induced draft fan is connected to a main negative pressure pipe (6), the oil drain tank is connected to a first negative pressure pipe (4), the oil storage tank is connected to a second negative pressure pipe (5), and the first negative pressure pipe (4) and the second negative pressure pipe (5) are both connected to the main negative pressure pipe (6).

3. The ethylene tar storage and transportation structure according to claim 2, characterized in that: The negative pressure system also includes a desulfurization and denitrification air duct, which is connected to the main negative pressure pipe (6). The two ends of the desulfurization and denitrification air duct are respectively connected to the melting furnace and the chimney. The induced draft fan, the melting furnace, the desulfurization and denitrification air duct and the chimney are arranged in sequence.

4. The ethylene tar storage and transportation structure according to claim 3 is characterized in that: A three-way valve (9) is provided at the top of the oil storage tank, and the upper end of the oil inlet pipe (1) and the upper end of the second negative pressure pipe (5) are both connected to the three-way valve (9); the bottom end of the first negative pressure pipe (4) is located at the upper end of the oil drain pool, and the oil inlet pipe (1) extends to the bottom of the oil drain pool.

5. The ethylene tar storage and transportation structure according to any one of claims 1 to 4, characterized in that: The bottoms of the oil storage tank and the oil drain pool are both provided with steam heating devices (10).

6. The ethylene tar storage and transportation structure according to claim 5, characterized in that: Valves are provided on the oil inlet pipe (1), the oil pool oil inlet pipe (2) and the first negative pressure pipe (4).

7. The ethylene tar storage and transportation structure according to claim 2, characterized in that: Both the first negative pressure pipe (4) and the second negative pressure pipe (5) are provided with sewage discharge gate valves (11).

8. The ethylene tar storage and transportation structure according to claim 7, characterized in that: The main negative pressure pipe (6) is provided with a flow regulating valve (12) and a negative pressure gauge (13).

9. The ethylene tar storage and transportation structure according to claim 1, characterized in that: The oil inlet pipe (1) is also provided with a flexible connection (14), and the flexible connection (14) is located between the oil pump (3) and the oil drain tank.

10. The ethylene tar storage and transportation structure according to claim 1, characterized in that: Fixed brackets (7) are arranged at equal intervals on the side of the oil storage tank, and a guardrail (8) is arranged on the upper end of the oil storage tank.

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