Low-loss ultra-pure ammonia liquid phase filling system

Abstract

The utility model relates to a low-loss ultra-pure ammonia liquid phase filling system, which belongs to the technical field of liquid ammonia filling, and comprises a finished product tank, a finished product cooler and a switching valve assembly, the finished product tank is used for containing liquid phase ultra-pure ammonia, the inlet end of the finished product cooler is communicated with the outlet end of the finished product tank through a liquid ammonia conveying pipeline, and the outlet end of the finished product cooler is communicated with the switching valve assembly. The outlet end of the finished product cooler is connected with a liquid ammonia filling pipeline, and a plurality of control valves are connected into the liquid ammonia conveying pipeline and the liquid ammonia filling pipeline; the switching valve assembly comprises a three-way angle valve, and three ports of the three-way angle valve are communicated with a liquid ammonia filling pipeline and a tank car through a liquid phase filling hose and communicated with a tail gas absorption tower through a pressure relief hose. According to the filling system, repeated replacement of the filling pipeline before filling each time is avoided, the loss rate of ultra-pure ammonia is reduced, and then the working load of a tail gas system is reduced; the filling time is saved by one hour, and the utilization rate and the filling efficiency of the filling station are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid ammonia filling, and in particular relates to a low-loss ultra-pure ammonia liquid phase filling system. Background Art

[0002] During the transportation of ultra-pure liquid ammonia, it is necessary to boost the pressure of liquid ammonia from the ultra-pure ammonia finished product tank and then discharge it quantitatively into the tank truck for transportation. The existing filling process of ultra-pure liquid ammonia is as follows: connect the liquid phase hose and the gas phase hose to the tank truck interface through the filling port; open the liquid phase filling valve, fill the filling hose with ammonia, close the liquid phase filling valve, open the valve connected to the tail gas absorption tower to relieve the pressure of the filling hose, and repeat the replacement until the liquid nitrogen in the filling hose passes the analysis, then filling can be carried out; open the liquid phase filling valve and the liquid phase filling port valve of the tank truck to fill, after the filling is completed, close the liquid phase filling valve, relieve the pressure of the filling hose, and finally remove the filling hose. The following problems exist during the replacement of the existing filling hose:

[0003] (1) The waste ammonia generated by the replacement before each filling is discharged into the exhaust system, resulting in a high loss rate of finished ultra-pure ammonia (as shown in Table 1), which further increases the load of the exhaust gas recovery system; (2) The time consumed by repeated replacement before each filling is not conducive to the utilization rate of limited filling positions and affects the production load; (3) The manual opening and closing of the valve to replace the filling pipe is not conducive to product quality control and reduces the service life of the filling hose; (4) If the replacement is not thorough during the disassembly and assembly of the filling pipeline, some gas ammonia will leak, posing a safety hazard.

[0004] . Utility Model Content

[0005] Technical problem to be solved: In view of the problems existing in the ultrapure liquid ammonia filling process in the background technology, the utility model provides a low-loss ultrapure ammonia liquid phase filling system, which reduces the loss rate of ultrapure ammonia and improves the filling efficiency.

[0006] Technical solution: The utility model discloses a low-loss ultrapure ammonia liquid phase filling system, the filling system comprising:

[0007] A finished product tank, wherein the finished product tank is used to contain liquid ultrapure ammonia;

[0008] A finished product cooler, wherein the inlet end of the finished product cooler is connected to the outlet end of the finished product tank through a liquid ammonia delivery pipeline, and the outlet end of the finished product cooler is connected to a liquid ammonia filling pipeline; a plurality of control valves are connected to the liquid ammonia delivery pipeline and the liquid ammonia filling pipeline;

[0009] The switching valve assembly comprises a three-way angle valve, wherein the three ports of the three-way angle valve are respectively connected to the liquid ammonia filling pipeline and the tank truck through a liquid filling hose, and are connected to the tail gas absorption tower through a pressure relief hose.

[0010] Preferably, the three-way angle valve comprises a three-way valve body and a control valve stem connected to the three-way valve body, the top end of the control valve stem is connected to a driving hand wheel; and first connecting flanges are provided at the three ports of the three-way valve body.

[0011] Preferably, each connection port of the three-way valve body is correspondingly provided with a mounting end pipe, the mounting end pipe comprises a second pipe body and a third connecting flange arranged at one end of the second pipe body, and the other end of the second pipe body is provided with an external threaded area;

[0012] The external threaded area of ​​the installation end tube is cooperatively connected with a hose connector, and the hose connector comprises a hexagonal connecting end adapted to the installation end tube and a pipe body plug-in end for connecting the hose.

[0013] Preferably, at least one connecting pipe section is provided between the installation end pipe and the three-way valve body, and the connecting pipe section comprises a first pipe body and second connecting flanges respectively provided at two ends of the first pipe body.

[0014] Preferably, the liquid ammonia delivery pipeline is connected to a first electric valve and a first valve body and a check valve respectively arranged at the front and rear ends of the first electric valve.

[0015] Preferably, the liquid ammonia filling pipeline is connected to the second valve body, the second electric valve, the third valve body and the fourth valve body in sequence, and the liquid ammonia filling pipeline leads out a plurality of liquid ammonia output branch pipelines between the third valve body and the fourth valve body.

[0016] Preferably, one of the liquid ammonia output branch pipelines is connected to the analysis chamber, and the liquid ammonia output branch pipeline is connected to the ninth valve body;

[0017] A liquid ammonia output branch pipeline is connected to the nitrogen purifier, and the liquid ammonia output branch pipeline is connected to the tenth valve body;

[0018] A liquid ammonia output branch pipeline is communicated with the tail gas absorption tower, and the liquid ammonia output branch pipeline is connected to the eleventh valve body.

[0019] Preferably, the finished product tank is provided with a finished product tank evaporation system.

[0020] Preferably, the finished product cooler is provided with a cooler cooling system.

[0021] Preferably, the tank truck is connected to the tail gas absorption tower through a gas-phase filling hose, and the inlet and outlet ends of the gas-phase filling hose are respectively connected to the sixth valve body and the eighth valve body.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. The filling system of the utility model avoids repeated replacement of the filling pipe before each filling, directly saves 50 kg of ultra-pure ammonia each time, and reduces the loss rate by 100%, thereby reducing the loss rate of ultra-pure ammonia and reducing the workload of the exhaust system;

[0024] 2. The filling system saves one hour of filling time and improves the filling position utilization and filling efficiency;

[0025] 3. The filling system is conducive to the quality control of ultra-pure ammonia and eliminates product quality problems caused by replacement of filling hoses;

[0026] 4. The filling system is conducive to extending the service life of the filling hose and reducing the risk of ammonia leakage caused by disassembly of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the process of the ultra-pure ammonia liquid phase filling system of the utility model;

[0028] Figure 2 yes Figure 1 Schematic diagram of the switching valve assembly structure;

[0029] Figure 3 yes Figure 2 Schematic diagram of the structure of a medium three-way angle valve;

[0030] Figure 4 yes Figure 2 Schematic diagram of the connection structure between the middle connecting pipe joint and the installation end pipe.

[0031] Figure numerals: 100, filling system; 1, finished product tank; 2, liquid ammonia delivery pipeline; 3, first valve body; 4, first electric valve; 5, check valve; 6, finished product cooler; 7, liquid ammonia filling pipeline; 8, second valve body; 9, second electric valve; 10, third valve body; 11, liquid ammonia output branch pipeline; 12, fourth valve body; 13, liquid phase filling hose; 14, switching valve assembly; 15, tank car; 16, fifth valve body; 17, sixth valve body; 18, gas phase filling hose; 19, pressure relief hose; 20, seventh valve body; 21, eighth valve body; 22, ninth valve body; 23, analysis room; 24, tenth valve body; 25, nitrogen purifier; 26, eleventh valve body; 27, tail gas absorption tower; 28, finished product tank evaporation system; 29, cooler cooling system; 30, three-way angle valve; 301, three-way valve body; 302, control valve stem; 303, drive hand wheel; 304, first connecting flange; 31, connecting pipe joint; 3101, first pipe body; 3102, second connecting flange; 32, installation end pipe; 3201, second pipe body; 3202, third connecting flange; 3203, external thread area; 33, hose connector; 3301, hexagonal connecting end; 3302, hose plug end; 34, pressure relief valve. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figures 1 to 4 The technical scheme of the embodiment of the utility model is clearly and completely described as shown. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0033] like Figure 1~2As shown, a low-loss ultrapure ammonia liquid filling system of the utility model, the filling system 100 comprises a finished product tank 1, a finished product cooler 6 and a switching valve assembly 14. The finished product tank 1 is used to contain liquid ultrapure ammonia, the inlet end of the finished product cooler 6 is connected to the outlet end of the finished product tank 1 through a liquid ammonia delivery pipeline 2, and the outlet end of the finished product cooler 6 is connected to a liquid ammonia filling pipeline 7, and the liquid ammonia delivery pipeline 2 and the liquid ammonia filling pipeline 7 are connected to multiple control valves according to needs, and the control valve can select a manual valve or an electric valve according to needs to achieve the purpose of pipeline cutoff or connection. The finished product tank 1 is provided with a finished product tank evaporation system 28, and the finished product cooler 6 is provided with a cooler cooling system 29. The finished product tank evaporation system 28 uses 0.38MPa saturated steam as a heat source, condenses and releases heat in the process of flowing through the finished product tank 1, thereby increasing the vapor pressure of the purified ammonia in the finished product tank 1, so that the ultra-pure ammonia can be discharged through the liquid ammonia delivery pipeline 2; the cooler cooling system 29 uses 40% ethylene glycol solution as a cold source, evaporates and absorbs heat in the process of flowing through the finished product cooler 6, thereby liquefying the ultra-pure gas ammonia flowing through the finished product cooler 6, and performing the filling operation in the form of ultra-pure liquid ammonia.

[0034] In a preferred embodiment, if Figure 1 As shown, the liquid ammonia delivery pipeline 2 is connected with a first electric valve 4 and a first valve body 3 and a check valve 5 which are respectively arranged at the front and rear ends of the first electric valve 4. The first valve body 3 can be a manual valve and is in a normally open state during the normal filling process. When the filling system is inspected and repaired, the system can be closed by the first valve body 3. The liquid ammonia delivery pipeline 2 is connected or disconnected by controlling the first electric valve 4, and remote automatic control can be realized. The check valve 5 can prevent the ultra-pure ammonia liquid flowing through the liquid ammonia delivery pipeline 2 from flowing in the reverse direction.

[0035] In a preferred embodiment, if Figure 1 As shown, the second valve body 8, the second electric valve 9, the third valve body 10 and the fourth valve body 12 are sequentially connected to the liquid ammonia filling pipeline 7, and the liquid ammonia filling pipeline 7 leads to multiple liquid ammonia output branch pipelines 11 between the third valve body 10 and the fourth valve body 12. The second valve body 8, the third valve body 10 and the fourth valve body 12 can all be manual valves, and the second valve body 8 and the third valve body 10 are in a normally open state during the filling process; the liquid ammonia filling pipeline 7 is connected or disconnected by controlling the second electric valve 9, and remote automatic control can be achieved; the fourth valve body 12 is in a closed state before or after the filling starts, so as to meet the connection or separation of the liquid phase filling hose 13 and the liquid ammonia filling pipeline 7.

[0036] In a preferred embodiment, if Figure 1As shown, a liquid ammonia output branch pipeline 11 connected to the liquid ammonia filling pipeline 7 is connected to the analysis chamber 23, and the liquid ammonia output branch pipeline 11 is connected to the ninth valve body 22, and ultra-pure liquid ammonia is quantitatively collected for analysis by connecting the liquid ammonia output branch pipeline 11 to monitor the quality of the ultra-pure ammonia product to meet the purity requirements of the filling;

[0037] In a preferred embodiment, if Figure 1 As shown, a liquid ammonia output branch pipeline 11 connected to the liquid ammonia filling pipeline 7 is connected to the nitrogen purifier 25, and the tenth valve body 24 is connected to the liquid ammonia output branch pipeline 11. The filling pipeline is purged with liquid nitrogen by connecting the liquid ammonia output branch pipeline 11, so as to avoid repeated replacement of the filling pipeline before each filling. Each filling directly saves 50KG of ultra-pure ammonia, and the loss rate is reduced by 100%, thereby reducing the loss rate of ultra-pure ammonia and reducing the workload of the exhaust system.

[0038] In a preferred embodiment, if Figure 1 As shown, a liquid ammonia output branch pipeline 11 connected to the liquid ammonia filling pipeline 7 is connected to the tail gas absorption tower 27, and the liquid ammonia output branch pipeline 11 is connected to the eleventh valve body 26. In this filling system, when it is checked that the purity of the ultra-pure ammonia product does not meet the filling requirements, the eleventh valve body 26 is opened to connect the liquid ammonia output branch pipeline 11 to the tail gas absorption tower 27, and the unqualified product is discharged to the tail gas absorption tower 27 for treatment.

[0039] like Figures 2~4As shown, the switching valve assembly 14 includes a three-way angle valve 30, and the three ports of the three-way angle valve 30 are respectively connected to the liquid ammonia filling pipeline 7 and the tank car 15 through the liquid phase filling hose 13, and connected to the tail gas absorption tower 27 through the pressure relief hose 19. Specifically, the three-way angle valve 30 includes a three-way valve body 301 and a control valve stem 302 connected to the three-way valve body 301, and the top of the control valve stem 302 is connected to a driving hand wheel 303; the three ports of the three-way valve body 301 are all provided with a first connecting flange 304. Each connection port of the three-way valve body 301 is correspondingly provided with an installation end pipe 32, and the installation end pipe 32 includes a second pipe body 3201 and a third connecting flange 3202 arranged at one end of the second pipe body 3201, and the other end of the second pipe body 3201 is provided with an external threaded area 3203, and the installation end pipe 32 can be fixedly connected to the first connecting flange 304 through the third connecting flange 3202. The external threaded area 3203 of the installation end pipe 32 is connected with a hose connector 33, which includes a hexagonal connection end 3301 adapted to the installation end pipe 32 and a hose plug end 3302 for hose connection. The external threaded area 3203 of the installation end pipe 32 can be fixedly threadedly connected through the hexagonal connection end 3301 by using a special wrench; the liquid-phase filling hose 13 and the pressure relief hose 19 can be fixedly connected to the installation end pipe 32 through the hose plug end 3302, and the hose connector 33 can facilitate the separation or installation of the liquid-phase filling hose 13 and the pressure relief hose 19 from the installation end pipe 32. The filling system is conducive to extending the service life of the filling hose and reducing the risk of ammonia leakage caused by disassembly of the pipeline.

[0040] In a preferred embodiment, if Figure 1 As shown, at least one connecting pipe section 31 is arranged between the installation end pipe 32 and the three-way valve body 301, and the connecting pipe section 31 includes a first pipe body 3101 and second connecting flanges 3102 respectively arranged at both ends of the first pipe body 3101, and the two ends of the connecting pipe section 31 are respectively fixedly connected to the first connecting flange 304 of the three-way valve body 301 and the third connecting flange 3202 of the installation end pipe 32 through the second connecting flange 3102; wherein, the number of connecting pipe sections 31 is set according to demand to meet the layout requirements of the liquid filling hose 13 and the pressure relief hose 19.

[0041] In a specific embodiment, if Figure 2As shown, the three ports of the three-way angle valve 30 are respectively fixedly connected with a connecting pipe section 31, and the outer end of each connecting pipe section 31 is correspondingly connected with a mounting end pipe 32 and a hose connector 33. The switching valve assembly 14 is a T-shaped structure. The two hose connectors 33 on the same line are respectively connected to the liquid ammonia filling pipeline 7 and the tank truck 15 through the liquid phase filling hose 13. The fifth valve body 16 is provided at the connection between the liquid phase filling hose 13 and the tank truck 15. After the tank truck 15 is filled, the corresponding liquid phase filling hose 13 is closed through the fifth valve body 16. A pressure relief valve 34 is provided at the outer end of a vertically arranged connecting pipe section 31. The outer end of the pressure relief valve 34 is fixedly connected to the mounting end pipe 32 and the hose connector 33. The hose connector 33 is fixedly connected to the pressure relief hose 19. A seventh valve body 20 is provided at the outlet end of the pressure relief hose 19. When the liquid-phase filling hose 13 connected to the tank truck 15 is filled and the fifth valve body 16 is in a closed state, the pressure relief valve 34 and the seventh valve body 20 are connected, and then the hand wheel 303 is driven to rotate so that the liquid-phase filling hose 13 connected to the tank truck 15 is connected to the pressure relief hose 19, so that the ultra-pure liquid ammonia in the liquid-phase filling hose 13 enters the tail gas absorption tower 27 for treatment, thereby facilitating the disassembly of the liquid-phase filling hose 13 connected to the tank truck 15; when the liquid-phase filling hose 13 connected to the tank truck 15 is disassembled, a plugging head (not shown in the figure) is used to plug the response port of the three-way valve body 301 to meet the connection of the liquid-phase filling hose 13 of the next tank truck. The filling system saves one hour of filling time and improves filling position utilization and filling efficiency.

[0042] like Figure 1 As shown, the tank truck 15 is connected to the tail gas absorption tower 27 through the gas phase filling hose 18, and the inlet and outlet ends of the gas phase filling hose 18 are respectively connected to the sixth valve body 17 and the eighth valve body 21. The gaseous ammonia that may not meet the purity requirements in the tank truck 15 can be discharged into the tail gas absorption tower 27 through the gas phase filling hose 18 for treatment, thereby meeting the filling requirements of ultra-pure ammonia liquid phase.

[0043] The above are preferred implementations of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A low-loss ultrapure ammonia liquid phase filling system, characterized in that: The filling system (100) comprises: A finished product tank (1), wherein the finished product tank (1) is used to contain liquid ultrapure ammonia; A finished product cooler (6), wherein the inlet end of the finished product cooler (6) is connected to the outlet end of the finished product tank (1) via a liquid ammonia delivery pipeline (2), and the outlet end of the finished product cooler (6) is connected to a liquid ammonia filling pipeline (7); a plurality of control valves are connected to the liquid ammonia delivery pipeline (2) and the liquid ammonia filling pipeline (7); A switching valve assembly (14), the switching valve assembly (14) comprising a three-way angle valve (30), the three ports of the three-way angle valve (30) being respectively connected to a liquid ammonia filling pipeline (7) and a tank truck (15) via a liquid phase filling hose (13), and connected to a tail gas absorption tower (27) via a pressure relief hose (19).

2. The low-loss ultrapure ammonia liquid phase filling system according to claim 1 is characterized in that: The three-way angle valve (30) comprises a three-way valve body (301) and a control valve stem (302) connected to the three-way valve body (301), wherein the top end of the control valve stem (302) is connected to a driving hand wheel (303); and first connecting flanges (304) are provided at the three ports of the three-way valve body (301).

3. The low-loss ultrapure ammonia liquid phase filling system according to claim 2, characterized in that: A connecting port of each three-way valve body (301) is correspondingly provided with a mounting end pipe (32), wherein the mounting end pipe (32) comprises a second pipe body (3201) and a third connecting flange (3202) arranged at one end of the second pipe body (3201), and an external threaded area (3203) is arranged at the other end of the second pipe body (3201); The external threaded area (3203) of the mounting end tube (32) is connected to a hose connector (33), and the hose connector (33) comprises a hexagonal connection end (3301) adapted to the mounting end tube (32) and a pipe body plug-in end (3302) for connection of the hose.

4. The low-loss ultrapure ammonia liquid phase filling system according to claim 3 is characterized in that: At least one connecting pipe section (31) is provided between the installation end pipe (32) and the three-way valve body (301), and the connecting pipe section (31) comprises a first pipe body (3101) and second connecting flanges (3102) respectively provided at two ends of the first pipe body (3101).

5. The low-loss ultrapure ammonia liquid phase filling system according to any one of claims 1 to 4, characterized in that: The liquid ammonia delivery pipeline (2) is connected to a first electric valve (4) and a first valve body (3) and a check valve (5) respectively arranged at the front and rear ends of the first electric valve (4).

6. The low-loss ultrapure ammonia liquid phase filling system according to claim 5, characterized in that: The liquid ammonia filling pipeline (7) is connected in sequence to a second valve body (8), a second electric valve (9), a third valve body (10) and a fourth valve body (12), and the liquid ammonia filling pipeline (7) leads out a plurality of liquid ammonia output branch pipelines (11) between the third valve body (10) and the fourth valve body (12).

7. The low-loss ultrapure ammonia liquid phase filling system according to claim 6, characterized in that: A liquid ammonia output branch pipeline (11) is in communication with the analysis chamber (23), and a ninth valve body (22) is connected to the liquid ammonia output branch pipeline (11); A liquid ammonia output branch pipeline (11) is connected to the nitrogen purifier (25), and a tenth valve body (24) is connected to the liquid ammonia output branch pipeline (11); A liquid ammonia output branch pipeline (11) is connected to the tail gas absorption tower (27), and an eleventh valve body (26) is connected to the liquid ammonia output branch pipeline (11).

8. The low-loss ultrapure ammonia liquid phase filling system according to claim 6, characterized in that: The finished product tank (1) is provided with a finished product tank evaporation system (28).

9. The low-loss ultrapure ammonia liquid phase filling system according to claim 6, characterized in that: The finished product cooler (6) is provided with a cooler cooling system (29).

10. The low-loss ultrapure ammonia liquid phase filling system according to claim 6, characterized in that: The tank truck (15) is connected to the tail gas absorption tower (27) via a gas phase filling hose (18), and the inlet and outlet ends of the gas phase filling hose (18) are respectively connected to the sixth valve body (17) and the eighth valve body (21).

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