Liquid ammonia unloading tail gas recovery device

Abstract

The utility model relates to a liquid ammonia unloading tail gas recovery device, which belongs to the technical field of tail gas recovery and comprises a crane pipe and a tank car joint, a three-way valve is detachably mounted between the crane pipe and the tank car joint, and a crane pipe valve is mounted at one end, connected with the crane pipe, of the three-way valve. The end, connected with the tank car connector, of the three-way valve is provided with a tank car valve, the side, not connected with the crane pipe and the tank car connector, of the three-way valve is connected with negative pressure equipment, and the end, connected with the negative pressure equipment, of the three-way valve is provided with a recovery valve. By means of the negative pressure device and the three-way valve, after liquid ammonia unloading is completed, liquid ammonia or gas ammonia remaining in the crane pipe is recycled firstly, the liquid ammonia or the gas ammonia is prevented from being discharged into the air and polluting the working environment, and the personal safety of workers is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rare earth cleaning, in particular to a liquid ammonia unloading tail gas recovery device. Background Art

[0002] A crane pipe is a retractable and movable pipe, mostly used for liquid loading and unloading at petroleum and chemical terminals, with media such as oil and water. It is divided into many types, and has advantages such as high safety and flexibility compared to the old hose. Crane pipes are also used for liquid ammonia unloading.

[0003] When liquid ammonia is unloaded from a truck using a crane pipe, there will be residue in the crane pipe after unloading. After the crane pipe joint is pulled out, the residual liquid ammonia or gaseous ammonia will be discharged into the air, generating harmful gases that will affect the environment and workers. Utility Model Content

[0004] In view of the above problems in the prior art, the utility model provides a liquid ammonia unloading tail gas recovery device, which is achieved through the following technical solutions:

[0005] A liquid ammonia unloading tail gas recovery device comprises a crane pipe and a tank truck joint, a three-way valve is detachably installed between the crane pipe and the tank truck joint, a crane pipe valve is installed at one end of the three-way valve connected to the crane pipe, a tank truck valve is installed at one end of the three-way valve connected to the tank truck joint, a negative pressure device is connected to the side of the three-way valve that is not connected to the crane pipe and the tank truck joint, and a recovery valve is installed at one end of the three-way valve connected to the negative pressure device.

[0006] The utility model is further configured as follows: the negative pressure equipment includes a recovery pipe and a recovery tank, the recovery pipe is connected to one side of the three-way valve on which the recovery valve is installed, the end of the recovery pipe away from the three-way valve is connected to the recovery tank, a vacuum pump is installed on the outer wall of the recovery tank, the air intake port of the vacuum pump is connected to the recovery tank, and a pressure gauge is installed on the recovery tank.

[0007] The utility model is further configured as follows: a delivery pipeline is installed on a side of the recovery tank away from the recovery pipe, a delivery valve is installed on a side of the delivery pipeline close to the recovery tank, and an end of the delivery pipeline away from the recovery tank is connected to an incinerator.

[0008] The utility model is further configured as follows: sealing rings are arranged at the connection points between the crane pipe, the tank truck joint, the negative pressure equipment and the three-way valve.

[0009] In summary, the beneficial technical effects of the utility model are:

[0010] Through negative pressure equipment and three-way valve, after the liquid ammonia is unloaded, the liquid ammonia or gaseous ammonia remaining in the crane pipe is first recovered to prevent the liquid ammonia or gaseous ammonia from being discharged into the air and polluting the working environment, thereby ensuring the personal safety of the staff; the recovered liquid ammonia or gaseous ammonia is finally transported to the incinerator through a transmission pipeline for incineration treatment to prevent the material from polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram for showing the entirety of the utility model.

[0012] Figure numerals: 1. crane pipe; 2. tank truck connector; 3. three-way valve; 301. crane pipe valve; 302. tank truck valve; 303. recovery valve; 4. negative pressure equipment; 401. recovery pipe; 402. recovery tank; 5. vacuum pump; 6. pressure gauge; 7. delivery pipeline; 701. delivery valve. DETAILED DESCRIPTION

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0014] Example

[0015] like Figure 1 As shown, a liquid ammonia unloading exhaust gas recovery device disclosed by the utility model includes a crane pipe 1, a tank truck connector 2 and a material bin for containing materials, a valve is arranged between the crane pipe 1 and the material bin, a three-way valve 3 is detachably installed between the crane pipe 1 and the tank truck connector 2, a crane pipe valve 301 is installed at one end of the three-way valve 3 connected to the crane pipe 1, a tank truck valve 302 is installed at one end of the three-way valve 3 connected to the tank truck connector 2, a negative pressure device 4 is connected to the side of the three-way valve 3 that is not connected to the crane pipe 1 and the tank truck connector 2, and a recovery valve 303 is installed at one end of the three-way valve 3 connected to the negative pressure device 4.

[0016] The negative pressure equipment 4 includes a recovery pipe 401 and a recovery tank 402. The recovery pipe 401 is connected to the side of the three-way valve 3 where the recovery valve 303 is installed. The end of the recovery pipe 401 away from the three-way valve 3 is connected to the recovery tank 402. A vacuum pump 5 is installed on the outer wall of the recovery tank 402. The air intake port of the vacuum pump 5 is connected to the recovery tank 402. A pressure gauge 6 is installed on the recovery tank 402.

[0017] A delivery pipeline 7 is installed on the side of the recovery tank 402 away from the recovery pipe 401, a delivery valve 701 is installed on the side of the delivery pipeline 7 close to the recovery tank 402, and one end of the delivery pipeline 7 away from the recovery tank 402 is connected to the incinerator.

[0018] The connection points between the crane pipe 1 , the tank truck joint 2 , the negative pressure device 4 and the three-way valve 3 are all provided with sealing rings.

[0019] The specific implementation method of this example is as follows: when unloading, the three-way valve 3 is installed between the tank truck connector 2 and the crane pipe 1 connector, the recovery valve 303 is closed, and the crane pipe valve 301, the valve between the crane pipe 1 and the material bin, the tank truck valve 302 and the valve on the tank truck are opened to unload the vehicle. After unloading, the valve between the crane pipe 1 and the material bin and the valve on the tank truck are closed, and the recovery tank 402 is evacuated by the vacuum pump 5. After the recovery tank 402 reaches a vacuum state, the recovery valve 303 is opened. Under the action of negative pressure, the residual material in the crane pipe 1 enters the recovery tank 402 through the recovery pipe 401. After the recovery is completed, all valves on the three-way valve 3 are closed. When the recovered material needs to be processed, the delivery valve 701 is opened and transported to the incinerator through the delivery pipeline 7 for incineration.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A liquid ammonia unloading tail gas recovery device, comprising a crane pipe (1) and a tank car joint (2), characterized in that: A three-way valve (3) is detachably installed between the crane pipe (1) and the tank truck connector (2); a crane pipe valve (301) is installed at one end of the three-way valve (3) connected to the crane pipe (1); a tank truck valve (302) is installed at one end of the three-way valve (3) connected to the tank truck connector (2); a negative pressure device (4) is connected to the side of the three-way valve (3) not connected to the crane pipe (1) and the tank truck connector (2); and a recovery valve (303) is installed at one end of the three-way valve (3) connected to the negative pressure device (4).

2. A liquid ammonia unloading tail gas recovery device according to claim 1, characterized in that: The negative pressure device (4) comprises a recovery pipe (401) and a recovery tank (402); the recovery pipe (401) is connected to a side of the three-way valve (3) on which the recovery valve (303) is installed; the end of the recovery pipe (401) away from the three-way valve (3) is connected to the recovery tank (402); a vacuum pump (5) is installed on the outer wall of the recovery tank (402); an air intake port of the vacuum pump (5) is connected to the recovery tank (402); and a pressure gauge (6) is installed on the recovery tank (402).

3. A liquid ammonia unloading tail gas recovery device according to claim 2, characterized in that: A delivery pipeline (7) is installed on the side of the recovery tank (402) away from the recovery pipe (401), a delivery valve (701) is installed on the side of the delivery pipeline (7) close to the recovery tank (402), and one end of the delivery pipeline (7) away from the recovery tank (402) is connected to the incinerator.

4. The liquid ammonia unloading tail gas recovery device according to claim 1 is characterized in that: Sealing rings are provided at the connection points between the crane pipe (1), the tank truck joint (2), the negative pressure device (4) and the three-way valve (3).

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