Tank car chemical conveying pipeline structure

Abstract

The utility model discloses a tank car chemical conveying pipeline structure, which relates to the technical field of chemical conveying pipelines and comprises a tank car unloading area, a tank car exhaust tank, a sampling box, a nitrogen conveying end, a pure water conveying end, a pipeline exhaust end, a tank car exhaust end, a liquid discharge end, a main body flowing pipeline and a storage tank. By arranging independent exhaust pipelines for exhaust of the tank car interface equipment and exhaust of the tank car, acid gas is prevented from back flushing into the equipment during exhaust of the tank car; a communicating pipe is designed at the gas end and the liquid end, and a pneumatic switch valve is designed on the communicating pipe, so that the sealing performance of the interface is detected before pressurization; a flow limiting ring is designed at the joint of nitrogen and the exhaust pipe, so that a large amount of acid gas is prevented from being back-flushed into equipment connected with the exhaust pipe when the tank car exhausts air; a high-efficiency filter is designed, a tank car interface door sensor is designed, and the high-efficiency filter is automatically started when a tank car interface door is opened.

Description

Technical Field

[0001] This utility model relates to the field of chemical product transportation pipeline technology, specifically to a tank truck chemical product transportation pipeline structure. Background Technology

[0002] Currently, chemical product factories on the market use chemicals of various properties for production. However, as raw materials, these chemicals need to be prepared and stored like conventional materials before use. Some liquid chemicals need to be stored in storage tanks before use for easy access. Liquid chemicals are transported by tank trucks. However, when transporting chemicals from tank trucks to storage tanks, existing tank truck transport structures often suffer from problems such as acid backflow, insufficient tightness of liquid-end connections, lack of a clean environment for connecting tank trucks, and low transmission efficiency. Utility Model Content

[0003] Purpose of the utility model: The technical problem to be solved by this utility model is to provide a tank truck chemical transport pipeline structure, which solves the problems of acid gas backflow, inability to test the tightness of the connection at the liquid end, lack of a clean environment for connecting tank trucks, and low transmission efficiency that have occurred in the tank truck transport structure.

[0004] Technical solution

[0005] To solve the above problems, the technical solution provided by this utility model is as follows:

[0006] A tanker truck chemical transport pipeline structure includes a tanker truck unloading area, a tanker truck exhaust tank, a sampling box, a nitrogen transport end and a pure water transport end, a pipeline exhaust end and a tanker truck exhaust end, a liquid discharge end, a main flow pipeline, and a storage tank. The tanker truck exhaust tank is directly connected to the tanker truck exhaust end. The tanker truck unloading area contains a tanker truck, and the tanker truck is equipped with a first manual valve and a second manual valve. The tanker truck unloading area is equipped with a tanker truck gas end connection pipe connected to the first manual valve, and a tanker truck liquid end connection pipe connected to the second manual valve. The nitrogen transport end is equipped with a first nitrogen pipeline and a second nitrogen pipeline. The second nitrogen pipeline is connected to the upper end of the main flow pipeline, and the lower end of the main flow pipeline is connected to the tanker truck gas end connection pipe and the tanker truck liquid end connection pipe. A first switch valve is provided between the main flow pipeline and the second nitrogen pipeline, and a third switch valve is provided between the main flow pipeline and the tanker truck liquid end connection pipe. An exhaust tank pipeline connects the main flow pipeline and the tanker truck exhaust tank.

[0007] Furthermore, the first manual valve is located on the top surface of the tanker truck, and the second manual valve is located on the side surface of the tanker truck.

[0008] Furthermore, the tank truck unloading area is a surrounding sealed area, which is fully surrounded by side walls. The tank truck unloading area is equipped with a door, a door sensor, and a high-efficiency filter.

[0009] Furthermore, the door sensor controls the high-efficiency filter.

[0010] Furthermore, the exhaust tank pipeline is equipped with a No. 2 switch valve and a flow limiting ring.

[0011] Furthermore, the first nitrogen pipeline extends into the tank truck unloading area, and a nitrogen gun is provided at the end of the first nitrogen pipeline within the tank truck unloading area.

[0012] Furthermore, the pure water delivery end is provided with two branch pipes, namely a first pure water pipe and a second pure water pipe. The first pure water pipe extends into the forklift area, and a pure water gun is provided at the end of the first pure water pipe in the tank truck unloading area.

[0013] Furthermore, the second pure water pipeline is connected to the sampling box.

[0014] Furthermore, the storage tank is connected to the liquid end connection pipe of the tank truck via a storage tank pipeline. The storage tank pipeline and the main flow pipeline share the same pipeline in the part connected to the liquid end connection pipe of the tank truck. A No. 5 switch valve is provided between the storage pipeline and the main flow pipeline.

[0015] Furthermore, the storage tank pipeline is provided with a sampling pipeline that communicates with the sampling box, and the sampling pipeline is provided with a No. 4 switch valve.

[0016] Beneficial effects

[0017] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0018] The technical solution provided by this utility model includes separate exhaust pipes for the tank truck interface equipment and the tank truck exhaust, preventing acid gas from backflowing into the equipment during tank truck exhaust; a connecting pipe is designed at the gas end and the liquid end, and a pneumatic switch valve is designed on the connecting pipe to perform interface sealing tests before pressurization; a flow-limiting ring is designed at the connection between the nitrogen and the exhaust pipe to prevent a large amount of acid gas from backflowing into the equipment connected to the exhaust pipe during tank truck exhaust; a high-efficiency filter is designed, and a tank truck interface door sensor is designed to automatically activate the high-efficiency filter when the tank truck interface door is opened; and pure water and nitrogen guns are designed at the interface for cleaning the connector before connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model. Detailed Implementation

[0020] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] Combined with appendix Figure 1 A tank truck chemical transport pipeline structure includes a tank truck unloading area, a tank truck exhaust tank, a sampling box, and several ports and pipeline structures connecting the various components. The pipeline structure is as follows: Figure 1 The layout structure shown, Figure 1 The vertical relationship in the schematic diagram reflects the actual distribution and positional relationship of the pipeline structure.

[0023] The tank truck unloading area is used to park tank trucks transporting chemicals. Each tank truck is equipped with a first manual valve 1 and a second manual valve 2. The first manual valve is located on the top of the tank truck, and the second manual valve is located on the side of the tank truck. The tank truck unloading area is a surrounding sealed area, completely surrounded by side walls. The tank truck unloading area is equipped with a door for the tank truck to enter and exit. The door opens when the tank truck enters or exits and closes when the tank truck is parked in the tank truck unloading area. The tank truck unloading area is equipped with a door sensor and a high-efficiency filter. The high-efficiency filter is used to filter the residue carried by the tank truck when it enters the tank truck unloading area, ensuring the cleanliness of the tank truck unloading area. The operation of the high-efficiency filter is controlled by the door sensor. When the door sensor detects that the door is open, the high-efficiency filter opens; when the door sensor detects that the door is closed, the high-efficiency filter closes.

[0024] The tank truck unloading area is equipped with a tank truck air end connection pipe and a tank truck liquid end connection pipe. The tank truck air end connection pipe is connected to the first manual valve of the tank truck after the tank truck enters the tank truck unloading area, and the tank truck liquid end connection pipe is connected to the second manual valve of the tank truck after the tank truck enters the tank truck unloading area.

[0025] It also includes a nitrogen delivery end and a pure water delivery end, which are used to provide nitrogen and pure water for sealing and cleaning of the pipeline structure.

[0026] It is also equipped with a pipeline exhaust end and a tank truck exhaust end. The pipeline exhaust end is used to exhaust the gas in the pipeline, and the tank truck exhaust end is used to exhaust the gas in the tank truck. The tank truck exhaust tank is directly connected to the tank truck exhaust end.

[0027] It also includes storage tanks, which are used to hold the chemicals in tank trucks, which then transport the chemicals they are carrying to the storage tanks for use.

[0028] A pressure regulating valve is installed at the nitrogen delivery end of the pipeline. After the pressure regulating valve is installed, the nitrogen pipeline is divided into two pipelines, namely the first nitrogen pipeline and the second nitrogen pipeline. The first nitrogen pipeline extends into the tank truck unloading area. A nitrogen gun is installed at the end of the first nitrogen pipeline in the tank truck unloading area. The nitrogen gun is for manual use by workers. A filter is installed on the side of the first nitrogen pipeline near the pressure regulating valve.

[0029] The overall pipeline structure contains a main flow pipeline, the tail end of which is connected to the gas end connection pipe and the liquid end connection pipe of the tank truck. The pipeline structure also contains a tank truck exhaust tank. The tank truck exhaust tank is used to directly discharge the gas in the tank truck into the exhaust pipe when the chemical liquid in the tank truck is discharged, which may carry gas containing chemical media particles. This prevents the gas carrying chemical media particles from flowing back into the device.

[0030] The main flow pipeline has a branch in the middle section with an exhaust tank pipeline, which is connected to the tank truck exhaust tank. The exhaust pipe is equipped with a No. 2 switch valve AV02, a flow limiting ring, and the tank truck exhaust tank in sequence. The No. 2 switch valve AV02 is used to switch the connection and closure between the main flow pipeline and the exhaust tank pipeline. When the No. 2 switch valve AV02 is closed, the main flow pipeline is no longer connected to the liquid end connection pipe of the tank truck.

[0031] The second nitrogen pipeline connects to the head end of the main flow pipeline. The second nitrogen pipeline is equipped with a capillary tube connected to the pipeline exhaust end, so that there is always a small amount of gas flowing. This prevents chemical molecules from diffusing into the nitrogen metal pipeline due to molecular diffusion if the tank truck has not been filled with chemicals for a long time, which could cause damage to the metal pipeline.

[0032] A No. 1 switch valve AV01 is installed between the head end of the main connecting pipe connected to the second nitrogen pipeline and the exhaust tank pipeline. The No. 1 switch valve AV01 is used to switch the connection and closure between the nitrogen delivery end and the main flow pipeline. When the No. 1 switch valve AV01 is closed, the second nitrogen pipeline is no longer connected to the main flow pipeline. A pressure sensor PT01 is installed on the main pipeline between the exhaust tank pipeline and the tank truck gas end connecting pipe. The tank truck gas end connecting pipe and the tank truck liquid end connecting pipe are supplied with gas by the main pipeline at the same time. A No. 3 switch valve AV03 is installed on the main pipeline between the tank truck gas end connecting pipe and the tank truck liquid end connecting pipe. The No. 3 switch valve AV03 is used to switch the connection and closure between the main flow pipeline and the tank truck liquid end connecting tank. When the No. 3 switch valve AV03 is closed, the main flow pipeline is no longer connected to the tank truck exhaust tank.

[0033] The pipeline structure is also equipped with a sampling box, which is used to sample the chemicals transported by tank trucks for convenient testing and storage.

[0034] The pure water delivery end is equipped with two branch pipes, namely the first pure water pipe and the second pure water pipe. The first pure water pipe extends into the forklift area, and a pure water gun is provided at the end of the first pure water pipe in the tank truck unloading area. The pure water gun is convenient for workers to use.

[0035] The second pure water pipe is connected to the sampling box, making it convenient to clean the sampling box.

[0036] The main flow pipeline and the tank truck liquid end connection pipe are connected in the opposite direction to the storage tank pipeline. The storage tank pipeline and the main flow pipeline share the same pipeline in the part connected to the tank truck liquid end connection pipe. That is, the port part of the connection pipe between the storage tank pipeline and the tank truck liquid end connection pipe is the connection pipe between the main flow pipeline and the tank truck liquid end connection pipe. A No. 5 switch valve AV05 is installed between the storage pipeline and the main flow pipeline. The No. 5 switch valve AV05 is used to switch the connection and closure of the storage tank pipeline and the tank truck liquid end connection pipe. When the No. 5 switch valve AV05 is open, the tank truck is connected to the storage tank pipeline through the tank truck liquid end connection pipe, thereby connecting the tank truck and the storage tank.

[0037] The storage tank pipeline is equipped with a branch pipeline connected to the sampling box, namely the sampling pipeline. The sampling pipeline is equipped with a No. 4 switch valve AV04. The No. 4 switch valve AV04 is used to switch the connection and closure between the storage tank pipeline and the sampling box. When the No. 4 switch valve AV04 is closed, the storage tank pipeline is isolated from the sampling box.

[0038] The bottom of the pipe structure is also equipped with a drain end, which is used to drain the waste liquid and excess liquid in the pipe.

[0039] The tank truck unloading area is connected to the drain end, allowing the liquid in the unloading area to be discharged directly through the drain end. The bottom of the tank truck exhaust air tank is connected to the drain end, allowing the liquid filtered during exhaust from the tank truck exhaust air tank to be discharged through the drain end.

[0040] The bottom of the sampling box is connected to the drain end to discharge the waste liquid inside the sampling box. At the same time, the top of the sampling box is also connected to the exhaust pipe to facilitate the exhaust of the sampling box.

[0041] Pure water is generally used for cleaning within this pipe structure. After cleaning, the pure water is discharged through the drain end in various components within the pipe.

[0042] The main flow pipe, the first nitrogen pipe, and the second nitrogen pipe in the text are 3 / 4" inch PFA pipes, which greatly improve the pressurization efficiency of the tank truck and thus improve the unloading efficiency. The flow-limiting ring has a 6-8 mm orifice diameter to prevent a large amount of acid gas from backflowing into the equipment connected to the exhaust when the tank truck is venting.

[0043] A pure water gun and a nitrogen gun are used for cleaning the connectors before connection.

[0044] The bottom of the pipeline structure is also equipped with a leak sensor to detect and trigger an alarm when there is a leak of liquid or chemical products.

[0045] The working principle of this pipeline structure is as follows:

[0046] 1. When the tank truck enters the tank truck unloading area, connect the first manual valve and the second manual valve on the tank truck to the air end connection pipe and the liquid end connection pipe of the tank truck in the tank truck unloading area, respectively, thereby completing the connection between the tank truck and the air end connection pipe and the liquid end connection pipe of the tank truck. When the door of the tank truck unloading area is opened, the high-efficiency filter will work automatically to ensure that the joints in the tank truck unloading area are in a clean environment during the connection. After the joint connection is completed, close the door and the high-efficiency filter will automatically stop working. The operation of the high-efficiency filter is controlled by the door sensor.

[0047] 2. After connecting the first and second manual valves to the tank truck's air and liquid end connection pipes, perform an airtightness test. At this time, the tank truck's first and second manual valves are closed. Open switch valve AV01 and switch valve AV03 to pressurize the tank truck's air and liquid end connection pipes. When the pressure sensor PT01 reaches the set value, close switch valve AV01 to stop pressurizing. Switch valve AV03 remains open. If the air or liquid end connection is tight... Poor air tightness will cause the pressure sensor PT01 to drop, thus determining whether the air tightness of the interface between the gas-liquid end connection pipe and the manual valve is normal. When there is a problem with the air tightness of the interface, the problem can be further determined by closing the No. 3 switch valve AV03. When the No. 3 switch valve AV03 is closed, the pressure sensor pressure drops, indicating that the air tightness of the gas end interface is insufficient. When the No. 3 switch valve AV03 is closed, the pressure sensor pressure is normal, indicating that the air tightness of the liquid end interface is insufficient.

[0048] 3. After confirming that everything is normal, close valve AV03 (number 3). Open manual valve 1 and manual valve 2 in the tank truck. After confirming that they are open, the tank truck enters the pressurization state. Open AV01, and nitrogen will be continuously supplied to the tank truck through the main flow pipeline to increase the pressure inside the tank truck. When the pressure sensor PT01 detects that the pressure inside the tank truck has reached the set pressure, it enters the unloading waiting state.

[0049] 4. If the liquid level in the storage tank is lower than the required replenishment level while the tank truck is unloading and waiting, the storage tank will send a replenishment signal to the tank truck. Upon receiving the replenishment signal, the tank truck will begin replenishment. The tank truck will automatically open the No. 5 switch valve AV05 pneumatic valve. At this time, the No. 3 switch valve AV03 will be closed. Since the tank truck is pressurized through the main flow pipeline and the tank truck gas end connection pipe via the nitrogen delivery end, the high-pressure gas in the tank truck will squeeze out the liquid chemicals in the tank truck. Because the No. 3 switch valve AV03 is closed, the chemicals will not flow through the upper part of the main flow pipeline, but will directly enter the storage tank pipeline through the lower part of the main flow pipeline, transferring liquid to the storage tank.

[0050] Meanwhile, when the sampling box needs to take a sample, open the No. 4 switch valve AV04 to open the sampling pipeline. The chemical product enters the sampling box through the sampling pipeline. When the sample in the sampling box reaches the required level, close the No. 4 switch valve AV04 again to isolate the sampling pipeline from the storage tank pipeline.

[0051] 5. During the liquid transfer process in the tank truck, if the liquid level sensor FS01 detects no liquid signal, the control system will automatically determine that the tank truck is empty and will automatically enter the tank truck depressurization state. At this time, switch valve AV01 and switch valve AV05 are closed, switch valve AV03 remains closed, and switch valve AV02 is opened to unload the remaining nitrogen in the tank truck. The gas in the tank truck flows through the tank truck gas end connecting pipe, the main flow outlet, and into the exhaust tank pipeline. The flow limiting ring added to the exhaust tank pipeline causes the pressure unloading to occur slowly.

[0052] This method can prevent a large amount of acidic waste gas from being suddenly unloaded into the exhaust duct from the tank truck's exhaust end in a short period of time, thus avoiding the backflow of harmful gases.

[0053] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A structure for a tank truck chemical transport pipeline, characterized in that, The system includes a tanker unloading area, a tanker exhaust tank, a sampling box, a nitrogen delivery end and a pure water delivery end, a pipeline exhaust end and a tanker exhaust end, a liquid discharge end, a main flow pipeline, and a storage tank. The tanker exhaust tank is directly connected to the tanker exhaust end. The tanker unloading area contains a tanker, which is equipped with a first manual valve and a second manual valve. The tanker unloading area is equipped with a tanker gas end connection pipe connected to the first manual valve and a tanker liquid end connection pipe connected to the second manual valve. The nitrogen delivery end is equipped with a first nitrogen pipeline and a second nitrogen pipeline. The second nitrogen pipeline is connected to the upper end of the main flow pipeline, and the lower end of the main flow pipeline is connected to the tanker gas end connection pipe and the tanker liquid end connection pipe. A No. 1 switch valve is provided between the main flow pipeline and the second nitrogen pipeline, and a No. 3 switch valve is provided between the main flow pipeline and the tanker liquid end connection pipe. An exhaust tank pipeline connects the main flow pipeline and the tanker exhaust tank.

2. The structure of a tank truck chemical transport pipeline according to claim 1, characterized in that, The tank truck unloading area is a surrounding sealed area, which is fully surrounded by side walls. The tank truck unloading area is equipped with a door, a door sensor, and a high-efficiency filter.

3. The structure of a tank truck chemical transport pipeline according to claim 2, characterized in that, The gate sensor controls the high-efficiency filter.

4. The structure of a tank truck chemical transport pipeline according to claim 1, characterized in that, The exhaust tank pipeline is equipped with a No. 2 switch valve and a flow limiting ring.

5. The structure of a tank truck chemical transport pipeline according to claim 1, characterized in that, The first nitrogen pipeline extends into the tank truck unloading area, and a nitrogen gun is provided at the end of the first nitrogen pipeline within the tank truck unloading area.

6. The structure of a tank truck chemical transport pipeline according to claim 1, characterized in that, The pure water delivery end is provided with two branch pipes, namely a first pure water pipe and a second pure water pipe. The first pure water pipe extends into the tank truck unloading area, and a pure water gun is provided at the end of the first pure water pipe in the tank truck unloading area.

7. The structure of a tank truck chemical transport pipeline according to claim 6, characterized in that, The second pure water pipeline is connected to the sampling box.

8. The structure of a tank truck chemical transport pipeline according to claim 1, characterized in that, The storage tank is connected to the liquid end connection pipe of the tank truck by a storage tank pipeline. The storage tank pipeline and the main flow pipeline share the same pipeline in the part connected to the liquid end connection pipe of the tank truck. A No. 5 switch valve is provided between the storage pipeline and the main flow pipeline.

9. The structure of a tank truck chemical transport pipeline according to claim 8, characterized in that, The storage tank pipeline is equipped with a sampling pipeline that communicates with the sampling box, and the sampling pipeline is equipped with a No. 4 switch valve.

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