CN217464063U - Cold storage and precooling system of hydrogenation machine for hydrogenation station - Google Patents
Cold storage and precooling system of hydrogenation machine for hydrogenation station Download PDFInfo
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- CN217464063U CN217464063U CN202220887368.4U CN202220887368U CN217464063U CN 217464063 U CN217464063 U CN 217464063U CN 202220887368 U CN202220887368 U CN 202220887368U CN 217464063 U CN217464063 U CN 217464063U
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Abstract
The utility model relates to a hydrogenation machine cold-storage precooling system for hydrogenation station, including CO2 transcritical refrigeration cycle unit, ice-storage and cooling unit and hydrogen precooling unit. The CO2 transcritical refrigeration cycle unit comprises an evaporator, a compressor and a gas cooler which are connected through refrigeration cycle pipelines; the ice storage and cold supply unit comprises a cold storage pool, a cold release pump, a freezing pump and a secondary refrigerant circulating pipeline; the hydrogen pre-cooling unit comprises a heat exchanger and a hydrogen pre-cooling circulating pipeline. The utility model discloses can solve among the prior art refrigerating system equipment utilization rate low, energy-concerving and environment-protective effect poor, the running cost is high, the slow defect of hydrogenation rate.
Description
Technical Field
The utility model relates to a hydrogenation station technical field, concretely relates to hydrogenation machine cold storage precooling system for hydrogenation station.
Background
When the hydrogenation machine is filled with hydrogen, the coke breeze effect is generated, and the temperature of the hydrogen is increased. In order to prevent the hydrogen gas temperature from rising continuously during the filling process, the conventional solutions mainly adopt the following two types:
firstly, a communication interface connected with an automobile-mounted gas cylinder is arranged in the hydrogenation machine, and temperature and pressure signals of the automobile-mounted gas cylinder in the filling process are input into the hydrogenation machine. The effect of controlling the hydrogen temperature is achieved by adjusting the hydrogenation pressure increase rate. The scheme has high cost, and the hydrogenation time is prolonged due to the adjustment of the hydrogenation rate, so that the requirement of quick hydrogenation is difficult to realize.
Secondly, a pre-cooling mode before hydrogenation is adopted. Before hydrogen enters the hydrogenation machine, heat exchange is carried out through an external heat exchanger, so that after the temperature of the hydrogen is reduced, the vehicle-mounted gas cylinder is filled. The high-power refrigerating unit is additionally arranged to reduce the temperature of the coolant to-30 ℃, and the cooling medium of the heat exchanger is ethylene glycol solution or calcium chloride solution.
Therefore, a cold storage and precooling system of a hydrogenation machine for a hydrogenation station, which has the advantages of high equipment utilization rate, good energy-saving and environment-friendly effects, low operation cost and high hydrogenation rate, needs to be developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydrogenation machine cold-storage precooling system for hydrogenation station, this system can solve among the prior art defect that refrigerating system equipment utilization rate is low, energy-concerving and environment-protective effect is poor, the running cost is high, hydrogenation speed is slow.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a cold storage and pre-cooling system of a hydrogenation machine for a hydrogenation station comprises a CO2 transcritical refrigeration cycle unit, an ice storage and cold supply unit and a hydrogen pre-cooling unit. The CO2 transcritical refrigeration cycle unit comprises an evaporator, a compressor and a gas cooler which are connected through refrigeration cycle pipelines; the ice storage and cold supply unit comprises a cold storage pool, a cold release pump, a freezing pump and a secondary refrigerant circulating pipeline; the hydrogen pre-cooling unit comprises a heat exchanger and a hydrogen pre-cooling circulating pipeline.
Further, the CO2 transcritical refrigeration cycle unit further includes an expansion valve; the refrigeration cycle is connected in order of a gas cooler, an expansion valve, an evaporator and a compressor through a refrigeration cycle pipe.
Furthermore, the ice storage and cold supply unit also comprises a gate valve and a cold supply regulating valve; a cold release pump, a gate valve and a cold supply regulating valve are arranged on the secondary refrigerant pipeline and are connected with a cold storage pool interface f and a heat exchanger interface h; a gate valve is arranged on the secondary refrigerant pipeline and connected with a cold storage pool interface e and a heat exchanger interface g; one end of the secondary refrigerant pipeline is connected with the evaporator interface d, and the other end of the secondary refrigerant pipeline is connected between the gate valve and the cold supply regulating valve; a gate valve and a freezing pump are arranged on the secondary refrigerant pipeline, one end of the secondary refrigerant pipeline is connected with an evaporator connector c, and the other end of the secondary refrigerant pipeline is connected between the gate valve and the heat exchanger; a gate valve is arranged on the secondary refrigerant pipeline, one end of the gate valve is connected between the cold storage pool interface e and the gate valve, and the other end of the gate valve is connected between the cold storage pool interface f and the cold release pump; a gate valve is arranged on the secondary refrigerant pipeline, one end of the gate valve is connected between the cold storage pool interface f and the cold release pump, and the other end of the gate valve is connected between the cold release pump and the gate valve; the freezing pump and the cold releasing pump are propylene glycol circulating pumps.
The ice storage and cold supply unit further comprises a first gate valve, a second gate valve, a third gate valve, a fourth gate valve, a fifth gate valve and a cold supply regulating valve; a cold release pump, a third gate valve and a cold supply regulating valve are arranged on the third secondary refrigerant pipeline and are connected with a cold storage pool interface f and a heat exchanger interface h; a fourth gate valve is arranged on the fourth secondary refrigerant pipeline and is connected with a cold storage pool interface e and a heat exchanger interface g; one end of the first secondary refrigerant pipeline is connected with the evaporator connector d, and the other end of the first secondary refrigerant pipeline is connected between the third gate valve and the cold supply regulating valve; a fifth gate valve and a freezing pump are arranged on the second secondary refrigerant pipeline, one end of the fifth gate valve is connected with the evaporator interface c, and the other end of the fifth gate valve is connected between the fourth gate valve and the heat exchanger; a first gate valve is arranged on the fifth secondary refrigerant pipeline, one end of the fifth secondary refrigerant pipeline is connected between the cold storage pool interface e and the fourth gate valve, and the other end of the fifth secondary refrigerant pipeline is connected between the cold storage pool interface f and the cold release pump; a second gate valve is arranged on the sixth secondary refrigerant pipeline, one end of the second gate valve is connected between the cold storage pool interface f and the cold release pump, and the other end of the second gate valve is connected between the cold release pump and the third gate valve; the freezing pump and the cold releasing pump are propylene glycol circulating pumps.
Further, the hydrogen pre-cooling unit further comprises a hydrogen regulating valve; the first hydrogen pipeline is provided with a hydrogen regulating valve and connected with a heat exchanger interface i, and the second hydrogen pipeline is connected with a heat exchanger outlet j.
According to the technical scheme provided by the utility model, the utility model discloses a night peak valley electricity period adds the cold-making machine and fills cold to the coolant in the box, can save the working costs, avoids the electric power peak, alleviates electric wire netting pressure. And because the cold-storage makes the refrigerating output that needs refrigeration plant when using the cold volume peak reduce, the utility model discloses can reduce cold-storage system refrigeration plant's capacity, save refrigeration plant expense, make refrigeration plant's full load operation proportion increase, the state is more stable, improve equipment utilization.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein:
1. the system comprises a CO2 transcritical refrigeration cycle unit, a 2 gas cooler, a 3 expansion valve, a 4 evaporator, a 5 compressor, a 6 refrigeration cycle pipeline, a 7 refrigeration cycle pipeline, an ice storage and cold supply unit, a 8 cold storage pool, a 9 cold release pump, a 10 refrigeration pump, a 11 first refrigerating medium pipeline, a 12 second refrigerating medium pipeline, a 13 third refrigerating medium pipeline, a 14 fourth refrigerating medium pipeline, a 15 fifth refrigerating medium pipeline, a 16 sixth refrigerating medium pipeline, a 17 hydrogen precooling unit, a 18 heat exchanger, a 19 first hydrogen pipeline, a 20 second hydrogen pipeline, a 21 first gate valve, a 22 second gate valve, a 23 third gate valve, a 24 fourth gate valve, a 25 fifth gate valve, a 26 cold supply regulating valve, a 27 hydrogen regulating valve.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 shows a cold storage and pre-cooling system for a hydrogenation machine of a hydrogenation station, which comprises a CO2 transcritical refrigeration cycle unit 1, an ice storage and cold supply unit 7 and a hydrogen pre-cooling unit 17.
The CO2 transcritical refrigeration cycle unit 1 includes an evaporator 4, a compressor 5, a gas cooler 2, and an expansion valve 3 connected by a refrigeration cycle pipe 6. The CO2 transcritical refrigeration cycle unit 1 has a CO2 therein to perform a refrigeration cycle. The interface a of the evaporator 4 is connected with the inlet of the compressor 5, the outlet of the compressor 5 is connected with the inlet of the gas cooler 2, the outlet of the gas cooler 2 is connected with the inlet of the expansion valve 3, and the outlet of the expansion valve 3 is connected with the interface b of the evaporator 4; the expansion valve 3 is provided on the refrigeration cycle pipe between the gas cooler 2 and the evaporator 4. The CO2 transcritical refrigeration cycle unit 1 provides a cold source for the entire system. The refrigeration cycle process of the CO2 transcritical refrigeration cycle unit 1 is: the CO2 circulates through the refrigeration cycle line 6 as a refrigerant, exchanges heat with the coolant in the evaporator 4, absorbs heat, and lowers the temperature of the coolant. The heat-absorbed CO2 enters the compressor 5 and is compressed, raising the CO2 pressure above the critical pressure. The high pressure CO2 refrigerant enters the gas cooler, releases heat in a supercritical state, and is reduced in pressure by the expansion valve 3. The CO2 transcritical refrigeration cycle unit 1 is used for providing a cold source for the whole system. And the gas cooler 2 is used for cooling the supercritical CO 2. An expansion valve 3 for reducing the supercritical CO2 pressure. And the evaporator 4 is used for enabling the low-temperature CO2 to exchange heat with the refrigerating medium. Compressor 5 for increasing the CO2 pressure to supercritical.
The ice storage and cold supply unit 7 comprises a cold storage pool 8, a cold release pump 9, a freezing pump 10, a first secondary refrigerant pipeline 11, a second secondary refrigerant pipeline 12, a third secondary refrigerant pipeline 13, a fourth secondary refrigerant pipeline 14, a fifth secondary refrigerant pipeline 15 and a sixth secondary refrigerant pipeline 16. The ice storage and ice supply refrigeration unit 7 further comprises a first gate valve 21, a second gate valve 22, a third gate valve 23, a fourth gate valve 24, a fifth gate valve 25 and a cold supply regulating valve 26; the third secondary refrigerant pipeline 13 is provided with a cold release pump 9, a third gate valve 23 and a cold supply regulating valve 26 and is connected with a cold storage pool 8 interface f and a heat exchanger 18 interface h; a fourth gate valve 24 is arranged on the fourth secondary refrigerant pipeline 14 and is connected with a port e of the cold storage pool 8 and a port g of the heat exchanger 18; a first gate valve 21 is arranged on the fifth refrigerating medium pipeline 15, one end of the fifth refrigerating medium pipeline is connected between a port e of the cold storage pool 8 and a fourth gate valve 24, and the other end of the fifth refrigerating medium pipeline is connected between a port f of the cold storage pool 8 and a cold release pump 9; one end of the first secondary refrigerant pipeline 11 is connected with the interface d of the evaporator 4, and the other end is connected between the third gate valve 23 and the cold supply regulating valve 26; a fifth gate valve 25 and a freezing pump 10 are arranged on the second secondary refrigerant pipeline 12, one end of the fifth gate valve is connected with the interface c of the evaporator 4, and the other end of the fifth gate valve is connected between the fourth gate valve 24 and the heat exchanger 18; the sixth secondary refrigerant pipeline 16 is provided with a second gate valve 22, one end of the second gate valve is connected between the interface f of the cold storage pool 8 and the cold release pump 9, and the other end of the second gate valve is connected between the cold release pump 9 and a third gate valve 23. The cooling release pump 9 and the freezing pump 10 are propylene glycol circulating pumps. The functions of ice storage and cold supply are realized by controlling the valve and the pump. And the ice storage and cooling unit 7 is used for storing and supplying cold for the whole system. And the cold storage pool 8 is used for storing cold through phase change. The ice storage and cold supply modes are switched by controlling the opening and closing of the valves of the first gate valve, the second gate valve, the fourth gate valve and the fifth gate valve. And a cooling regulating valve 26 for regulating the cooling capacity.
The hydrogen pre-cooling unit 17 includes a heat exchanger 18 and a first hydrogen pipe 19. The hydrogen pre-cooling unit further comprises a hydrogen regulating valve 27; the first hydrogen pipeline 19 is provided with a hydrogen regulating valve 27 and is connected with a port i of the heat exchanger 18, and the second hydrogen pipeline 20 is connected with an outlet j of the heat exchanger 18. The hydrogen regulating valve 27 is used for regulating the amount of hydrogen in the pipeline, thereby regulating the inflation rate and the refrigeration effect. The hydrogen regulating valve is used for regulating the amount of hydrogen.
When the secondary refrigerant passes through CO 2 The evaporator 4 in the transcritical refrigeration cycle unit 1 is already loaded with cold. According to the use condition, the control is divided into 5 working conditions for control.
(1) The unit direct cooling daytime: the coolant passes through the first coolant pipe 11, then passes through the cooling control valve 26, and after the cooling capacity is changed to hydrogen gas by the heat exchanger 18, the coolant passes through the cooling-releasing pump 9 and the fifth gate valve 25, and returns to the evaporator 4 through the second coolant pipe 12 to be cooled again. In this state, the states of the valves and pumps in the system are: the first gate valve 21 is closed, the second gate valve 22 is closed, the third gate valve 23 is closed, the fourth gate valve 24 is closed, the fifth gate valve 25 is opened, the cooling supply regulating valve 26 is opened, the hydrogen regulating valve 27 is opened, the cooling release pump 9 is opened, and the freezing pump 10 is closed.
(2) Daytime unit + cold storage pond cooling: one path of secondary refrigerant passes through the first secondary refrigerant pipeline 11, then passes through the cold supply regulating valve 26, exchanges cold energy for hydrogen gas through the heat exchanger 18, passes through the refrigerating pump 10 and the fifth gate valve 25, and returns to the evaporator 4 through the second secondary refrigerant pipeline 12 for cooling again. The other path of secondary refrigerant enters the cold storage pool 8 through a fourth secondary refrigerant pipeline 14 through a fourth gate valve 24, the exchanged cold energy passes through a cold release pump 9, the third secondary refrigerant pipeline 13, a third gate valve 23 and a cold supply regulating valve 26, the heat exchanger 18 exchanges the cold energy for hydrogen, the cold energy returns to the cold storage pool 8 through the fourth gate valve 24 through the fourth secondary refrigerant pipeline 14 to be cooled again, the fifth secondary refrigerant pipeline 15 and the first gate valve 21 are used as bypass paths, and the cold energy is opened under the condition of small system cold energy demand to carry out cold energy regulation. In this state, the states of the valves and pumps in the system are: the first gate valve 21 is opened, the second gate valve 22 is closed, the third gate valve 23 is opened, the fourth gate valve 24 is opened, the fifth gate valve 25 is opened, the cooling supply regulating valve 26 is opened, the hydrogen regulating valve 27 is opened, the cooling release pump 9 is opened, and the freezing pump 10 is opened.
(3) The cold storage pool supplies cold daytime: the secondary refrigerant enters the cold storage pool 8 through the secondary refrigerant pipeline 14 through the fourth gate valve 24, after cold energy is obtained through the cold release pump 9, the secondary refrigerant is returned to the cold storage pool 8 through the fourth gate valve 24 and the fourth secondary refrigerant pipeline 14 to be cooled again through the third secondary refrigerant pipeline 13, the third gate valve 23 and the cold supply regulating valve 26 and after the hydrogen is changed by the heat exchanger 18, the cold energy is adjusted through the fourth gate valve 24 under the condition that the cold energy requirement of the system is small, and the fifth secondary refrigerant pipeline 15 and the first gate valve 21 serve as bypasses and are opened under the condition that the cold energy requirement of the system is small. In this state, the states of the valves and pumps in the system are: the first gate valve 21 is opened, the second gate valve 22 is closed, the third gate valve 23 is opened, the fourth gate valve 24 is opened, the fifth gate valve 25 is closed, the cooling supply regulating valve 26 is opened, the hydrogen regulating valve 27 is opened, the cooling release pump 9 is closed, and the freezing pump 10 is opened.
(4) Cooling by the night unit: the coolant passes through the first coolant line 11, then passes through the cooling regulator 26, exchanges cooling energy to hydrogen gas through the heat exchanger 18, passes through the refrigerating pump 10 and the fifth gate valve 25, and returns to the evaporator 4 through the second coolant line 12 to be cooled again. In this state, the states of the valves and pumps in the system are: the first gate valve 21 is closed, the second gate valve 22 is closed, the third gate valve 23 is closed, the fourth gate valve 24 is closed, the fifth gate valve 25 is opened, the cooling supply regulating valve 26 is opened, the hydrogen regulating valve 27 is opened, the cooling release pump 9 is opened, and the freezing pump 10 is closed.
(5) Cold accumulation at night: the secondary refrigerant enters the cold storage pool 8 through the first secondary refrigerant pipeline 11, then passes through the third gate valve 23 and the sixth secondary refrigerant pipeline 16 and the second gate valve 22, cold energy is stored in the cold storage pool, then the fourth secondary refrigerant pipeline 14 flows out, passes through the fourth gate valve 24, then passes through the freezing pump 10 and the fifth gate valve 25, and returns to the evaporator 4 through the second secondary refrigerant pipeline 12 to be cooled again. In this state, the states of the valves and pumps in the system are: the first gate valve 21 is closed, the second gate valve 22 is opened, the third gate valve 23 is opened, the fourth gate valve 24 is opened, the fifth gate valve 25 is opened, the cooling supply regulating valve 26 is closed, the hydrogen regulating valve 27 is closed, the cooling release pump 9 is opened, and the freezing pump 10 is closed.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (4)
1. A cold-storage precooling system of a hydrogenation machine for a hydrogenation station comprises a CO2 transcritical refrigeration cycle unit (1), an ice storage and cold supply unit (7) and a hydrogen precooling unit (17), and is characterized in that: the CO2 transcritical refrigeration cycle unit (1) comprises an evaporator (4), a compressor (5) and a gas cooler (2) which are connected through refrigeration cycle pipelines; the ice storage and cold supply unit comprises a cold storage pool (8), a cold release pump (9) and a freezing pump (10); the hydrogen pre-cooling unit comprises a heat exchanger (18).
2. The cold storage and precooling system for the hydrogenation machine of the hydrogenation station, as recited in claim 1, is characterized in that: the CO2 transcritical refrigeration cycle unit further comprises an expansion valve (3); the refrigeration cycle is connected in the order of the gas cooler (2), the expansion valve (3), the evaporator (4) and the compressor (5) by the refrigeration cycle pipe (6).
3. The cold storage and precooling system for the hydrogenation machine of the hydrogenation station, as recited in claim 1, is characterized in that: the ice storage and cold supply unit further comprises a first gate valve (21), a second gate valve (22), a third gate valve (23), a fourth gate valve (24), a fifth gate valve (25) and a cold supply regulating valve (26); a cold release pump (9), a third gate valve (23) and a cold supply regulating valve (26) are arranged on the third secondary refrigerant pipeline (13) and are connected with a port f of the cold storage pool (8) and a port h of the heat exchanger (18); a fourth gate valve (24) is arranged on the fourth secondary refrigerant pipeline (14) and is connected with a joint e of the cold storage pool (8) and a joint g of the heat exchanger (18); one end of the first secondary refrigerant pipeline (11) is connected with the interface d of the evaporator (4), and the other end of the first secondary refrigerant pipeline is connected between the third gate valve (23) and the cold supply regulating valve (26); a fifth gate valve (25) and a freezing pump (10) are arranged on the second secondary refrigerant pipeline (12), one end of the fifth gate valve is connected with the interface c of the evaporator (4), and the other end of the fifth gate valve is connected between a fourth gate valve (24) and the heat exchanger (18); a first gate valve (21) is arranged on a fifth secondary refrigerant pipeline (15), one end of the fifth secondary refrigerant pipeline is connected between a joint e of the cold storage pool (8) and a fourth gate valve (24), and the other end of the fifth secondary refrigerant pipeline is connected between a joint f of the cold storage pool (8) and a cold release pump (9); a second gate valve (22) is arranged on the sixth secondary refrigerant pipeline (16), one end of the sixth secondary refrigerant pipeline is connected between the interface f of the cold storage pool (8) and the cold release pump (9), and the other end of the sixth secondary refrigerant pipeline is connected between the cold release pump (9) and a third gate valve (23); the freezing pump (10) and the cold releasing pump (9) are propylene glycol circulating pumps.
4. The cold storage and precooling system for the hydrogenation machine of the hydrogenation station, as recited in claim 1, is characterized in that: the hydrogen pre-cooling unit also comprises a hydrogen adjusting valve (27); the first hydrogen pipeline (19) is provided with a hydrogen regulating valve (27) and is connected with a connector i of the heat exchanger (18), and the second hydrogen pipeline (20) is connected with an outlet j of the heat exchanger (18).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220887368.4U CN217464063U (en) | 2022-04-18 | 2022-04-18 | Cold storage and precooling system of hydrogenation machine for hydrogenation station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220887368.4U CN217464063U (en) | 2022-04-18 | 2022-04-18 | Cold storage and precooling system of hydrogenation machine for hydrogenation station |
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| CN217464063U true CN217464063U (en) | 2022-09-20 |
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| CN202220887368.4U Active CN217464063U (en) | 2022-04-18 | 2022-04-18 | Cold storage and precooling system of hydrogenation machine for hydrogenation station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024068240A1 (en) * | 2022-09-29 | 2024-04-04 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Device and method for filling a pressurised-gas tank |
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2022
- 2022-04-18 CN CN202220887368.4U patent/CN217464063U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024068240A1 (en) * | 2022-09-29 | 2024-04-04 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Device and method for filling a pressurised-gas tank |
| FR3140414A1 (en) * | 2022-09-29 | 2024-04-05 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Device and method for filling a pressurized gas tank |
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