Novel purification treatment system for ultra-pure ammonia steel cylinder

Abstract

The utility model discloses a novel purification treatment system for an ultra-pure ammonia steel cylinder, which comprises an ultra-pure ammonia input end, a gas inlet manifold, a gas exchange system and the ultra-pure ammonia steel cylinder, the ultra-pure ammonia input end is connected to the front end of the gas inlet manifold, the gas exchange system is arranged in the middle of the gas inlet manifold, the tail end of the gas inlet manifold is connected to a gas phase valve of the ultra-pure ammonia steel cylinder, and the ultra-pure ammonia steel cylinder is connected to the gas phase valve of the ultra-pure ammonia steel cylinder. A tank car purge gas input end is connected to the gas inlet main pipe behind the gas exchange system; and a liquid phase valve of the ultra-pure ammonia steel cylinder is connected with the front end of the gas inlet end of the gas inlet main pipe through a pipeline. The system has the functions that the system adopts the purge gas of the ultra-pure ammonia tank car as a purging gas source to carry out replacement treatment on the ultra-pure ammonia steel cylinder, impurities can be continuously and irregularly replaced out, and the replacement rate of the steel cylinder is increased; in the process, the ultra-pure ammonia gas is used for directly passivating the steel cylinder, and a vaporization device does not need to be heated, so that the energy consumption is reduced; and ultrapure ammonia purification treatment and filling are integrated in one device, so that the secondary pollution phenomenon is avoided, and the steel cylinder treatment and filling efficiency is improved.

Description

Technical Field

[0001] This utility model patent belongs to the technical field of ultrapure ammonia cylinder purification equipment, specifically relating to a novel purification system for ultrapure ammonia cylinders. Background Technology

[0002] like Figure 1 As shown, ultrapure ammonia packaging container cylinders need to be cleaned and purified frequently for the following reasons: 1. When the annual inspection is due, nitrogen purging is required before inspection, and purification is required after the inspection is completed; 2. When valves are damaged and need to be replaced, nitrogen purging is required, and purification is required after repair; 3. Cross-contamination of the cylinder during use leads to contamination of the cylinder, which requires purification; 4. Newly purchased cylinders need purification for the first use.

[0003] The traditional method involves placing the cylinder in an oven at 40°C, purging it with high-purity nitrogen gas (gas phase in, liquid phase out) for over 24 hours, followed by 12 hours of vacuuming via a ventilation system. 100 kg of ultrapure ammonia is placed at the filling station, and the cylinder is then transferred to an oven for passivation treatment, maintained at 40°C and approximately 75 psi. Venting continues until all the ultrapure ammonia vaporizes. After 12 hours of vacuuming, the cylinder is transferred to an ultrapure ammonia filling rack, padded with 25 kg of gas. If the analysis is satisfactory, the cylinder is filled. If the analysis is unsatisfactory, the remaining liquid is purged from the filling rack, and the cylinder is vented to a slightly positive pressure. Vacuuming is then performed for approximately 2 hours via a ventilation system, and 25 kg of ultrapure ammonia is added again for analysis until the cylinder passes the test. This method requires over 48 hours to purify one ultrapure ammonia cylinder, consuming approximately 150 Nm³ of high-purity nitrogen gas. 3 It consumes approximately 150 kWh of electricity, and there are certain safety risks associated with using the drying oven. In addition, there is a risk of secondary contamination during the transfer of the cylinders in the drying oven and filling rack.

[0004] Therefore, this paper proposes a novel purification system for ultrapure ammonia cylinders. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a novel purification system for ultrapure ammonia cylinders. This system integrates the existing ultrapure ammonia cylinder processing and filling into a single device, eliminating the need for an oven and using the vent gas from an ultrapure ammonia tank truck as the replacement gas for purging. This avoids the risk of secondary contamination during the transfer of ultrapure ammonia cylinders from the oven to the filling rack, and also eliminates the possibility of ammonia leakage and explosion during the oven heating process. By using the vent gas from an ultrapure ammonia tank truck as the replacement gas, the cost of cylinder purification is significantly reduced.

[0006] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: a novel purification system for ultrapure ammonia cylinders, comprising an ultrapure ammonia input end, an inlet manifold, a ventilation system, and an ultrapure ammonia cylinder. The ultrapure ammonia input end is connected to the front end of the inlet manifold, a ventilation system is installed in the middle of the inlet manifold, and the end of the inlet manifold is connected to the gas phase valve of the ultrapure ammonia cylinder. A tank truck vent gas input end is connected to the inlet manifold behind the ventilation system. The liquid phase valve of the ultrapure ammonia cylinder is connected to the front end of the inlet of the inlet manifold through a pipeline.

[0007] Preferably, the ultrapure ammonia input terminal also includes an inlet pipe A, a filter, and a diaphragm valve A.

[0008] Preferably, the main intake pipe is also equipped with a diaphragm valve B, a diaphragm valve C, and a pressure gauge. The diaphragm valve B is installed on the main intake pipe between the ultrapure ammonia input end and the ventilation system, and the diaphragm valve C and the pressure gauge are installed sequentially from front to back on the main intake pipe between the ventilation system and the tank truck venting end.

[0009] Preferably, the ventilation system further includes ventilation pipe A, ventilation pipe B, venting component, and vacuuming component. The front ends of ventilation pipe A and ventilation pipe B are respectively connected to the middle of the main air intake pipe, and the venting component and vacuuming component are respectively installed on the rear ends of ventilation pipe A and ventilation pipe B.

[0010] Preferably, the venting assembly further includes a diaphragm valve D and a one-way valve A, which are installed sequentially from front to back on the ventilation pipe A.

[0011] Preferably, the vacuum assembly further includes a diaphragm valve E and a one-way valve B, which are installed sequentially from front to back on the ventilation pipe B.

[0012] Preferably, the tank truck venting gas input terminal also includes an intake pipe B, a one-way valve C, and a diaphragm valve F. The front end of the intake pipe B is equipped with the one-way valve C and the diaphragm valve F in sequence from front to back, and the rear end of the intake pipe B is connected to the intake manifold.

[0013] The beneficial effects of this utility model are:

[0014] This system uses purging gas from ultrapure ammonia tank trucks as the purging gas source to replace ultrapure ammonia cylinders. Ultrapure ammonia enters through the gas phase valve and exits through the liquid phase valve. After sufficient contact with the inner wall of the cylinder, the ultrapure ammonia continuously and improperly replaces impurities, which are then discharged through the liquid phase, greatly accelerating the cylinder replacement rate. During this process, ultrapure ammonia is used to directly passivate the cylinders, eliminating the need for heating and vaporization devices, thus reducing energy consumption. The ultrapure ammonia purification and filling are integrated into one device, eliminating secondary pollution and improving the cylinder processing and filling efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of an existing ultrapure gas analysis and detection device;

[0017] Figure 2 This is a structural diagram of the present invention;

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Ultrapure ammonia inlet; 2. Main inlet pipe; 3. Ultrapure ammonia cylinder; 4. Gas phase valve; 5. Tanker vent gas inlet; 6. Liquid phase valve; 7. Pipeline; 8. Inlet pipe A; 9. Filter; 10. Diaphragm valve A; 11. Diaphragm valve B; 12. Diaphragm valve C; 13. Pressure gauge; 14. Ventilation pipe A; 15. Ventilation pipe B; 16. Diaphragm valve D; 17. Check valve A; 18. Diaphragm valve E; 19. Check valve B; 20. Inlet pipe B; 21. Check valve C; 22. Diaphragm valve F; 23. Drying oven; 24. Rack. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. Example

[0021] like Figures 1 to 2 As shown, the existing technology in this embodiment has the following problems: The inventors found that the current existing technology requires more than 48 hours to purify an ultrapure ammonia cylinder, consuming approximately 150 Nm³ of high-purity nitrogen. 3 It consumes approximately 150 kWh of electricity. Using the drying oven also poses certain safety risks. In addition, there is a risk of secondary contamination during the transfer of the gas cylinders in the drying oven 23 and the filling rack 24.

[0022] Therefore, the inventor provides a novel purification system for ultrapure ammonia cylinder 3, including an ultrapure ammonia input terminal 1, an inlet manifold 2, a ventilation system, and an ultrapure ammonia cylinder 3. The ultrapure ammonia input terminal 1 is connected to the front end of the inlet manifold 2. A ventilation system is installed in the middle of the inlet manifold 2. The end of the inlet manifold 2 is connected to the gas phase valve 4 of the ultrapure ammonia cylinder 3. A tank truck vent gas input terminal 5 is connected to the inlet manifold 2 behind the ventilation system. The liquid phase valve 6 of the ultrapure ammonia cylinder 3 is connected to the front end of the inlet of the inlet manifold 2 through a pipe 7.

[0023] The effects are as follows: Ultra-pure ammonia tanker exhaust gas is used as the purging gas source to replace ultra-pure ammonia cylinder 3. Ultra-pure ammonia gas enters from the gas phase valve 4 and exits from the liquid phase valve 6. After the ultra-pure ammonia gas comes into full contact with the inner wall of the cylinder, it continuously and improperly replaces impurities and discharges them through the liquid phase, which greatly accelerates the cylinder replacement rate. In this process, ultra-pure ammonia gas is used to directly passivate the cylinder, eliminating the need for a heating vaporization device and reducing energy consumption. Ultra-pure ammonia purification and filling are integrated into one device, eliminating secondary pollution and improving the cylinder processing and filling efficiency.

[0024] Furthermore, the ultrapure ammonia input terminal 1 also includes an air inlet pipe A8, a filter 9, and a diaphragm valve A10; this structure can control the input of ultrapure ammonia.

[0025] Furthermore, the intake manifold 2 is also equipped with a diaphragm valve B11, a diaphragm valve C12, and a pressure gauge 13. The diaphragm valve B11 is installed on the intake manifold 2 between the ultrapure ammonia input end 1 and the ventilation system. The diaphragm valve C12 and the pressure gauge 13 are installed sequentially from front to back on the intake manifold 2 between the ventilation system and the tank truck venting end.

[0026] Furthermore, the ventilation system also includes ventilation pipe A14, ventilation pipe B15, venting assembly, and vacuum assembly. The front ends of ventilation pipe A14 and ventilation pipe B15 are respectively connected to the middle of the main air intake pipe 2, and the venting assembly and vacuum assembly are respectively installed on the rear ends of ventilation pipe A14 and ventilation pipe B15. This structure can quickly replace the exhaust gas in the pipe.

[0027] Furthermore, the venting assembly also includes a diaphragm valve D16 and a check valve A17, which are installed sequentially from front to back on the ventilation pipe A14.

[0028] Furthermore, the vacuum assembly also includes a diaphragm valve E18 and a one-way valve B19, which are installed sequentially from front to back on the ventilation pipe B15.

[0029] Furthermore, the tank truck venting gas input end 5 also includes an intake pipe B20, a one-way valve C21, and a diaphragm valve F22. The front end of the intake pipe B20 is equipped with the one-way valve C21 and the diaphragm valve F22 in sequence from front to back, and the rear end of the intake pipe B20 is connected to the intake manifold 2.

[0030] As can be seen from the above embodiments:

[0031] 1. Before the improvement of the existing technology, the purification time of ultrapure ammonia steel was more than 48 hours, while after the improvement, the purification time of the steel cylinder in this system is less than 24 hours.

[0032] 2. Before the improvement, the handling of the gas cylinder required 200 kg of ultrapure ammonia. After the improvement, the gas is released from the tank truck and reused, which does not consume ultrapure ammonia.

[0033] 3. Using ultrapure ammonia from the purge gas as the purification gas source eliminates the need for heating devices, saving more than 150 kWh of electricity per cylinder to be treated and greatly improving process safety.

[0034] The working principle of this utility model is as follows: When using this system, the cylinder to be processed can first be connected on the filling rack 24, then the residual liquid is compressed and vented to a slightly positive pressure. After evacuating the gas phase for 6 hours through the ventilation system, ultrapure ammonia gas is output from the tank truck venting gas input terminal 5 and enters from the cylinder gas phase valve 4. After fully contacting the inner wall of the cylinder, it is discharged from the liquid phase valve 6 and finally discharged through the ventilation system. During this process, the cylinder pressure needs to be maintained at 75 psi. After purging and passivation for 10 hours, the tail gas is analyzed and discharged through the liquid phase valve 6. After passing the test, the purging is stopped. After normal purging for about 12 hours, if it passes the test, it is vented to a slightly positive pressure. 25 kg of ultrapure ammonia is added for analysis. After the bottom gas analysis is qualified, it is filled through the ultrapure ammonia input terminal 1. If it fails the test, the residual liquid is compressed and vented to a slightly positive pressure. 25 kg of ultrapure ammonia is added again for analysis until it passes the test.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel purification system for ultrapure ammonia cylinders, comprising an ultrapure ammonia input terminal, an inlet manifold, a ventilation system, and ultrapure ammonia cylinders, characterized in that: The ultrapure ammonia input terminal is connected to the front end of the main inlet pipe. A ventilation system is installed in the middle of the main inlet pipe, and the end of the main inlet pipe is connected to the gas phase valve of the ultrapure ammonia cylinder. The tank truck vent gas input terminal is connected to the main inlet pipe after the ventilation system. The liquid phase valve of the ultrapure ammonia cylinder is connected to the front end of the main inlet pipe through a pipe. The ultrapure ammonia input terminal also includes an inlet pipe A, a filter, and a diaphragm valve A. The main inlet pipe is also equipped with a diaphragm valve B, a diaphragm valve C, and a pressure gauge. Diaphragm valve B is installed on the main inlet pipe between the ultrapure ammonia input terminal and the ventilation system. Diaphragm valve C and pressure gauge are installed sequentially from front to back on the main inlet pipe between the ventilation system and the tank truck vent gas input terminal.

2. The novel purification system for ultrapure ammonia cylinders according to claim 1, characterized in that: The ventilation system also includes ventilation pipe A, ventilation pipe B, venting assembly, and vacuum assembly. The front ends of ventilation pipe A and ventilation pipe B are respectively connected to the middle of the main air intake pipe, and the venting assembly and vacuum assembly are respectively installed on the rear ends of ventilation pipe A and ventilation pipe B.

3. The novel purification system for ultrapure ammonia cylinders according to claim 2, characterized in that: The venting assembly also includes a diaphragm valve D and a one-way valve A, which are installed sequentially from front to back on the ventilation pipe A.

4. The novel purification system for ultrapure ammonia cylinders according to claim 2, characterized in that: The vacuum assembly also includes a diaphragm valve E and a one-way valve B, which are installed sequentially from front to back on the ventilation pipe B.

5. The novel purification system for ultrapure ammonia cylinders according to claim 1, characterized in that: The tank truck venting gas input terminal also includes an intake pipe B, a one-way valve C, and a diaphragm valve F. The front end of the intake pipe B is equipped with a one-way valve C and a diaphragm valve F in sequence from front to back, and the rear end of the intake pipe B is connected to the intake manifold.

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