Recycling device for canned emptying gas

Abstract

The utility model discloses a recycling device for canned emptying gas, which comprises a gas inlet pipe, an anti-explosion fan, a water scrubber, an exhaust pipe and a torch which are sequentially connected, the output end of the anti-explosion fan is connected with an aeration pipe in the water scrubber, a liquid accumulation pool is arranged at the bottom of the water scrubber, the output end of the aeration pipe is positioned below the liquid level of the liquid accumulation pool, and the bottom of the water scrubber is connected with an overflow pipe. An atomization spraying assembly and a condensation assembly are arranged in the water washing tower, the condensation assembly is arranged above the atomization spraying assembly, and the exhaust pipe is connected with the top of the water washing tower. The effects of reducing material loss in the liquid ammonia loading process and relieving the pressure of tail gas combustion treatment are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas recovery devices, in particular to a recovery device for canned vented gas. Background Art

[0002] When liquid ammonia production enterprises are filling liquid ammonia tankers, some of the liquid ammonia will be vaporized. Usually, this part of the vaporized liquid ammonia is treated as venting air and directly transported to the ignition cabinet for combustion and emission. This treatment method of vaporized liquid ammonia not only generates a lot of energy loss, but is also not environmentally friendly. Summary of the invention

[0003] Technical problem to be solved by the utility model: Direct combustion and emission of gasified liquid ammonia results in energy waste and pollution.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a recovery device for canned vented gas, comprising an air inlet pipe, an explosion-proof fan, a water washing tower, an exhaust pipe and a flare connected in sequence, the output end of the explosion-proof fan is connected to the aeration pipe in the water washing tower, a liquid accumulation pool is provided at the bottom of the water washing tower, the output end of the aeration pipe is located below the liquid level of the liquid accumulation pool, an overflow pipe is connected to the bottom of the water washing tower, an atomizing spray assembly and a condensing assembly are provided in the water washing tower, the condensing assembly is arranged above the atomizing spray assembly, and the exhaust pipe is connected to the top of the water washing tower.

[0005] Preferably, the water inlet end opening of the overflow pipe is located above the discharge end opening of the aeration pipe.

[0006] Preferably, the atomizing spray assembly comprises an annular connecting plate fixedly arranged in the middle of the water washing tower, atomizing spray heads are arranged equidistantly on the edge of the connecting plate, a water washing pipe is fixed in the water washing tower, and the atomizing spray heads are arranged in parallel on the water washing pipe.

[0007] Preferably, the condensation assembly comprises a collecting hood arranged horizontally in a grid shape, a water pipe is installed on the collecting hood, and a drainage hole is opened on the water pipe.

[0008] Preferably, the condensation assembly includes a mounting plate fixedly mounted on the inner side wall of the water washing tower and air guide strips arranged horizontally and vertically on the mounting plate, the air guide strips are arranged equidistantly along the axial direction of the mounting plate, and the water pipe is fixed in the groove at the top of the air guide strip.

[0009] Preferably, the cross-section of the air guide strip is an inverted trapezoidal structure.

[0010] The utility model provides a recovery device for canned vented gas, which connects an air inlet pipe to a liquid ammonia filling device, extracts ammonia generated by gasification through an explosion-proof fan, transports the ammonia to an aeration pipe, washes the ammonia through the aeration pipe, and the ammonia after washing is contacted with the water mist generated by an atomizing spray component again to further recover the ammonia, and finally the water mist and the ammonia are contacted with a condensation component to collect the ammonia and the water mist, and finally the remaining gas is transported to a flare for combustion through an exhaust pipe to realize the treatment of tail gas, and can recover effective ammonia in the gas phase of the liquid ammonia filling device, thereby improving the utilization rate of the gasified liquid ammonia. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the utility model.

[0014] Figure 3 for Figure 2 Magnified view of area A.

[0015] In the figure: 1. Air inlet pipe; 2. Explosion-proof fan; 3. Water scrubber; 4. Exhaust pipe; 5. Flare; 6. Aeration pipe; 7. Overflow pipe; 8. Water scrubber; 9. Connecting plate; 10. Collecting hood; 11. Mounting plate; 12. Water pipe; 13. Air guide strip. DETAILED DESCRIPTION

[0016] like Figure 1-3 The utility model discloses a recovery device for canned vented gas, comprising an air inlet pipe 1, an explosion-proof fan 2, a water scrubber 3, an exhaust pipe 4 and a flare 5 which are connected in sequence, the output end of the explosion-proof fan 2 is connected to an aeration pipe 6 in the water scrubber 3, a liquid accumulation pool is arranged at the bottom of the water scrubber 3, the output end of the aeration pipe 6 is located below the liquid level of the liquid accumulation pool, an overflow pipe 7 is connected to the bottom of the water scrubber 3, an atomizing spray assembly and a condensing assembly are arranged in the water scrubber 3, the condensing assembly is arranged above the atomizing spray assembly, and the exhaust pipe 4 is connected to the top of the water scrubber 3.

[0017] The explosion-proof fan 2 draws air through the air inlet pipe 1, and draws the gas originally used for combustion in the liquid ammonia filling device into the air inlet pipe 1, and then enters the aeration pipe 6 through the explosion-proof fan 2. The gas is aerated in the liquid accumulation pool. The water in the liquid accumulation pool is the low-temperature water flowing down from the atomizing spray component and the condensation component above. During the aeration process, part of the ammonia in the gas dissolves in the water in the liquid accumulation pool, and the ammonia in the remaining gas contacts with the atomized water and absorbs the ammonia again. Finally, it passes through the condensation component, and the condensation component collects the atomized water to prevent the atomized water from entering the exhaust pipe 4 and the flare 5 and affecting the combustion of the exhaust gas.

[0018] When the water in the liquid accumulation pool overflows, it enters the overflow pipe 7 and is recovered as ammonia water.

[0019] like Figure 2 As shown, in order to ensure the quality of aeration, most of the ammonia in the input gas can be absorbed during the aeration process. The water inlet end of the overflow pipe 7 is located above the outlet end of the aeration pipe 6.

[0020] like Figure 2 As shown, in order to fully arrange the atomized water to contact the input gas and collect the ammonia, the atomizing spray assembly includes an annular connecting plate 9 fixedly arranged in the middle of the water washing tower 3, and the edge of the connecting plate 9 is equidistantly arranged with atomizing spray heads, and a water washing pipe 8 is fixed in the water washing tower 3, and the atomizing spray heads are arranged in parallel on the water washing pipe 8.

[0021] By fixing the water washing pipe 8 and the connecting plate 9 in the water washing tower 3, the end of the water washing pipe 8 is connected to the arc-shaped pipe head, and the pipe head is fixedly installed on the edge of the connecting plate 9, and then the atomizing nozzle is installed on the arc-shaped pipe head at equal angles along the axis of the connecting plate 9, atomized water is sprayed in all directions on the space of the water washing tower 3 below.

[0022] like Figure 2 and Figure 3 As shown. The condensation assembly includes a collection cover 10 arranged horizontally in a grid shape, and a water pipe 12 is installed on the collection cover 10, and a drainage hole is opened on the water pipe 12. The water discharged through the drainage hole of the water pipe 12 replenishes the liquid pool, ensuring the fluidity of the water in the liquid pool, thereby maintaining the water temperature at a low state. At the same time, the water flowing out of the drainage hole cools the outer wall of the condensation assembly. The atomized water contacts the condensation assembly in the process of flowing upward with the gas and collects on the surface of the condensation assembly, thereby reducing the atomized water from entering the exhaust pipe 4.

[0023] like Figure 3 The condensation assembly includes a mounting plate 11 fixedly mounted on the inner side wall of the water scrubber 3 and air guide strips 13 arranged horizontally and vertically on the mounting plate 11. The air guide strips 13 are arranged equidistantly along the axial direction of the mounting plate 11, and the water delivery pipe 12 is fixed in the top slot of the air guide strip 13. The equidistantly arranged air guide strips 13 form a grid structure, which can fully contact the gas flowing through.

[0024] like Figure 3 The cross section of the air guide strip 13 is an inverted trapezoidal structure. A gas channel with a wider bottom and a narrower top is formed between two adjacent air guide strips 13 for gas to pass through, which can increase the contact area between the gas and the air guide strip 13, and the water flowing out of the drainage hole flows down along the side wall of the air guide strip 13.

Claims

1. A recovery device for canned vented gas, characterized in that: The invention comprises an air inlet pipe (1), an explosion-proof fan (2), a water scrubber (3), an exhaust pipe (4) and a flare (5) which are connected in sequence. The output end of the explosion-proof fan (2) is connected to an aeration pipe (6) in the water scrubber (3). A liquid accumulation pool is provided at the bottom of the water scrubber (3). The output end of the aeration pipe (6) is located below the liquid level in the liquid accumulation pool. An overflow pipe (7) is connected to the bottom of the water scrubber (3). An atomizing spray assembly and a condensing assembly are provided in the water scrubber (3). The condensing assembly is arranged above the atomizing spray assembly. The exhaust pipe (4) is connected to the top of the water scrubber (3).

2. A recovery device for canned vented gas as claimed in claim 1, characterized in that: The water inlet end opening of the overflow pipe (7) is located above the discharge end opening of the aeration pipe (6).

3. A recovery device for canned vented gas as claimed in claim 1, characterized in that: The atomizing spray assembly comprises an annular connecting plate (9) fixedly arranged in the middle of the water washing tower (3), atomizing spray heads being arranged at equal intervals on the edge of the connecting plate (9), a water washing pipe (8) being fixed in the water washing tower (3), and the atomizing spray heads being arranged in parallel on the water washing pipe (8).

4. A recovery device for canned vented gas as claimed in claim 1, characterized in that: The condensation assembly comprises a collecting hood (10) arranged horizontally in a grid shape, a water pipe (12) being installed on the collecting hood (10), and a drainage hole being provided on the water pipe (12).

5. A recovery device for canned vented gas as claimed in claim 4, characterized in that: The condensation assembly comprises a mounting plate (11) fixedly mounted on the inner side wall of the water washing tower (3) and air guide strips (13) arranged horizontally and vertically on the mounting plate (11), the air guide strips (13) being arranged equidistantly along the axial direction of the mounting plate (11), and the water delivery pipe (12) being fixed in a groove at the top of the air guide strip (13).

6. A recovery device for canned vented gas as claimed in claim 5, characterized in that: The cross-section of the air guide strip (13) is in an inverted trapezoidal structure.

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