Quantitative heavy component extraction device for liquid ammonia purification

Abstract

The utility model belongs to the technical field of purification devices, and particularly relates to a liquid ammonia purification heavy component quantitative extraction device. The liquid ammonia purification heavy component quantitative extraction device comprises a heavy component removal tower and a heavy component treatment tank, the bottom of the heavy component removal tower is connected with the heavy component treatment tank, and a first stop valve and a second stop valve are arranged between the bottom of the heavy component removal tower and the heavy component treatment tank. And a collection and quantitative extraction pipeline is arranged between the 1 # stop valve and the 2 # stop valve. According to the liquid ammonia purification heavy component quantitative extraction device provided by the utility model, accurate extraction of heavy components is realized, and the stability and the efficiency of a liquid ammonia purification process are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of purification devices, and in particular relates to a device for quantitatively extracting heavy components from liquid ammonia purification. Background Art

[0002] In the liquid ammonia purification process, distillation towers play a crucial role, effectively separating the various components in the liquid ammonia to ensure the purity of the final product. However, when extracting the heavy components from the distillation tower, the traditional method relies on flow control using regulating valves and metering using flow meters. This solution works well when the heavy component extraction volume is high, but problems become apparent when the extraction volume is low.

[0003] When the heavy component extraction rate is low, flowmeters often fail to accurately capture and display the true flow rate. This is primarily due to the flowmeter's operating principle and design characteristics, which can prevent it from achieving sufficient measurement accuracy in low flow environments. Consequently, this inaccurate measurement can not only lead to confusion in material management but can also negatively impact the distillation column's liquid level control, ultimately affecting the stability and efficiency of the entire purification process.

[0004] Furthermore, inaccurate metering can pose a potential safety risk to the heavy component processing tank. If the heavy component extraction rate cannot be precisely controlled, the pressure within the processing tank may exceed the designed range, posing a safety hazard. Therefore, achieving accurate extraction and metering of heavy components in low-flow environments has become a pressing technical challenge in liquid ammonia purification processes.

[0005] To address these issues, the industry has been exploring more advanced and reliable solutions for heavy component recovery. However, existing solutions are either costly or technically complex, making them difficult to implement widely in production. Therefore, there is an urgent need for a new, economical and practical heavy component recovery system to overcome the shortcomings of existing technologies. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art, provide a device for quantitatively extracting heavy components from liquid ammonia purification, achieve accurate extraction of heavy components, and improve the stability and efficiency of the liquid ammonia purification process.

[0007] The device for quantitatively extracting heavy components from liquid ammonia purification described in the utility model comprises a deweighting tower and a heavy component processing tank. The bottom of the deweighting tower is connected to the heavy component processing tank, and a No. 1 shut-off valve and a No. 2 shut-off valve are provided between the bottom of the deweighting tower and the heavy component processing tank. A collecting and quantitative extraction pipeline is provided between the No. 1 shut-off valve and the No. 2 shut-off valve.

[0008] Preferably, the bottom outlet of the de-weighting tower is connected to the inlet of the reboiler, a heavy component pipeline is connected from the bottom outlet of the de-weighting tower and the inlet connecting pipe of the reboiler, the heavy component pipeline is connected to the 1# shut-off valve, and the outlet of the reboiler is connected to the liquid level above the de-weighting tower.

[0009] Further preferably, a sampling port is provided on the recombinant fraction pipeline at the bottom outlet of the deweighting tower.

[0010] Further preferably, the sampling port has a model of DN15mm.

[0011] Preferably, the collection and quantitative extraction pipeline has a model of DN100mm and a length of 1000mm.

[0012] Preferably, the heavy component processing tank is arranged at the lower part of the heavy component processing tower.

[0013] The device for quantitative extraction of heavy components from liquid ammonia purification described in the utility model is provided with a 1# shut-off valve and a 2# shut-off valve between the bottom of the deweighting tower and the heavy component processing tank, and a collection and quantitative extraction pipeline of a certain volume is provided between the 1# shut-off valve and the 2# shut-off valve. When the 1# shut-off valve is opened, the heavy components at the bottom of the deweighting tower enter and fill the collection and quantitative extraction pipeline. The 1# shut-off valve is closed, the 2# shut-off valve is opened, and the heavy components in the collection and quantitative extraction pipeline enter the heavy component processing tank. The 1# shut-off valve and the 2# shut-off valve are interlocked and automatically open and close according to the set time to achieve quantitative extraction. The 1# shut-off valve and the 2# shut-off valve are interlocked. When one shut-off valve is opened, the other shut-off valve is prohibited from opening. The 1# shut-off valve and the 2# shut-off valve are switched on and off once, that is, the collection and quantitative extraction pipeline is filled and discharged once, that is, the material of the collection pipeline capacity is discharged once.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This new device for quantitatively extracting heavy components from liquid ammonia purification is suitable for applications where flow rates are low and flow meters cannot accurately measure them. The material extraction volume can be accurately measured based on the volume of the collection pipeline between the two shutoff valves and the number of times the two valves are switched. The two valves are interlocked, allowing one valve to be opened while the other is closed. This prevents valve failure from causing continuous material discharge, which could affect the distillation column liquid level and lead to overpressure in the treatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the device for quantitatively extracting heavy components from liquid ammonia according to the present invention.

[0017] In the figure: 1. Degravity tower; 2. Heavy component treatment tank; 3. Reboiler; 4. Heavy component pipeline; 5. Sampling port; 6. 1# shut-off valve; 7. Collection and quantitative production pipeline; 8. 2# shut-off valve; 9. Heavy component treatment tower. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] like Figure 1 As shown, the liquid ammonia purification heavy component quantitative extraction device includes a deweighting tower 1 and a heavy component processing tank 2. The bottom of the deweighting tower 1 is connected to the heavy component processing tank 2, and a 1# shut-off valve 6 and a 2# shut-off valve 8 are provided between the bottom of the deweighting tower 1 and the heavy component processing tank 2. A collecting quantitative extraction pipeline 7 is provided between the 1# shut-off valve 6 and the 2# shut-off valve 8.

[0020] The bottom outlet of the de-weighting tower 1 is connected to the inlet of the reboiler 3, and a heavy component pipeline 4 is connected from the bottom outlet of the de-weighting tower 1 and the inlet connecting pipe of the reboiler 3. The heavy component pipeline 4 is connected to the 1# shut-off valve 6, and the outlet of the reboiler 3 is connected to the liquid level above the de-weighting tower 1.

[0021] Further preferably, a sampling port 5 is provided on the heavy component pipeline 4 at the bottom outlet of the deweighting tower 1 .

[0022] The model of the sampling port 5 is DN15mm.

[0023] The collecting and quantitative extraction pipeline 7 is of DN100mm and has a length of 1000mm.

[0024] The heavy component processing tank 2 is arranged at the lower part of the heavy component processing tower 9.

[0025] The device for quantitatively extracting heavy components from liquid ammonia according to the present invention is provided with a 1# shut-off valve 6 and a 2# shut-off valve 8 between the bottom of the deweighting tower 1 and the heavy component processing tank 2, and a collection and quantitative extraction pipeline 7 of a certain volume is provided between the 1# shut-off valve 6 and the 2# shut-off valve 8. When the 1# shut-off valve 6 is opened, the heavy components at the bottom of the deweighting tower 1 enter and fill the collection and quantitative extraction pipeline 7. The 1# shut-off valve 6 is closed, the 2# shut-off valve 8 is opened, and the heavy components in the collection and quantitative extraction pipeline 7 enter the heavy component processing tank 2. The 1# shut-off valve 6 and the 2# shut-off valve 8 are interlocked and automatically open and close according to the set time to achieve quantitative extraction. The 1# shut-off valve 6 and the 2# shut-off valve 8 are interlocked. When one shut-off valve is opened, the other shut-off valve is prohibited from opening. The 1# shut-off valve 6 and the 2# shut-off valve 8 are switched on and off once, which means that the collection and quantitative extraction pipeline 7 is filled and discharged once, that is, the material of the collection pipeline capacity is discharged once.

[0026] In practice, when liquid ammonia enters de-weighting tower 1 for purification, heavy components accumulate at the bottom of the tower. By opening shut-off valve 1# 6 and closing shut-off valve 2# 8, the heavy components are introduced into heavy component processing tank 2 via heavy component pipeline 4 and quantitative collection and withdrawal pipeline 7. The heavy component withdrawal rate can also be controlled by adjusting the opening of shut-off valve 1# 6. When sampling and analysis are required, this can be done through sampling port 5. Reboiler 3 utilizes a circulating heating system to improve purification efficiency.

[0027] Of course, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equivalent changes and improvements made by ordinary technicians in this technical field within the essential scope of the present invention should all fall within the scope of the patent of the present invention.

Claims

1. A device for quantitatively extracting heavy components from liquid ammonia, characterized by: The invention comprises a deweighting tower (1) and a heavy component processing tank (2), wherein the bottom of the deweighting tower (1) is connected to the heavy component processing tank (2), and a No. 1 shut-off valve (6) and a No. 2 shut-off valve (8) are provided between the bottom of the deweighting tower (1) and the heavy component processing tank (2), and a quantitative collection and extraction pipeline (7) is provided between the No. 1 shut-off valve (6) and the No. 2 shut-off valve (8).

2. The device for quantitatively extracting heavy components from liquid ammonia according to claim 1, characterized in that: The bottom outlet of the de-weighting tower (1) is connected to the inlet of the reboiler (3), a heavy component pipeline (4) is connected from the bottom outlet of the de-weighting tower (1) and the inlet connecting pipe of the reboiler (3), the heavy component pipeline (4) is connected to the No. 1 shut-off valve (6), and the outlet of the reboiler (3) is connected to the upper part of the liquid level of the de-weighting tower (1).

3. The device for quantitatively extracting heavy components from liquid ammonia according to claim 2, characterized in that: A sampling port (5) is provided on the heavy component pipeline (4) at the bottom outlet of the deweighting tower (1).

4. The device for quantitatively extracting heavy components from liquid ammonia according to claim 3, characterized in that: The model of the sampling port (5) is DN15mm.

5. The device for quantitatively extracting heavy components from liquid ammonia according to claim 1, characterized in that: The collecting and quantitative extraction pipeline (7) has a model of DN100mm and a length of 1000mm.

6. The device for quantitatively extracting heavy components from liquid ammonia according to claim 1, characterized in that: The heavy component processing tank (2) is arranged at the lower part of the heavy component processing tower (9).

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