Oil-gas condensation separation and hydrogenation precooling shared device for oil-hydrogen combined construction station

Abstract

The utility model discloses an oil-gas condensation separation and hydrogenation precooling shared device for an oil-hydrogen combined station. The oil-gas condensation separation and hydrogenation precooling shared device comprises a hydrogen storage device and an oil storage device, the hydrogen storage device is sequentially connected with the high-temperature side of the hydrogen heat exchanger, the hydrogen adding machine and the hydrogen filling device; a cooling coil is arranged outside the oil storage device; an outlet of the cooling coil is provided with an oil storage temperature detection sensor, and a hydrogen temperature detection sensor is arranged between the hydrogen heat exchanger and the hydrogenation machine; the high-temperature side of the oil tank heat exchanger is sequentially connected with the booster pump and the cooling coil to form circulation; two ends of the low-temperature side of the oil tank heat exchanger are connected with a second short-circuit bypass; and a second three-way valve is arranged between the second short-circuit bypass and the input end of the low-temperature side of the oil tank heat exchanger. Atmospheric pollution caused by oil gas volatilization is avoided, and the utilization efficiency of energy and equipment in the station is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of the construction of fuel and hydrogen filling stations, and particularly relates to a common device for oil-gas condensation separation and hydrogenation pre-cooling in an oil-hydrogen combined station. Background Art

[0002] The oil-hydrogen combined station can not only simplify the planning layout and construction problems of the hydrogen filling station, but also realize the rational utilization of the human resources and management systems of the existing gas stations, which is convenient for unified management.

[0003] During the hydrogen filling process of vehicles, the inside of the gas cylinder will heat up rapidly. In order to ensure the safety of the hydrogen filling process and avoid irreversible damage to the hydrogen storage device, the hydrogen should be pre-cooled by a pre-cooling device before filling, and its pre-cooling temperature is generally between -30°C and -40°C.

[0004] During the storage, transportation, loading and unloading of oil products, VOCs will be volatilized. VOCs refer to organic compounds with a saturated vapor pressure greater than 70 Pa at normal temperature and a boiling point below 260°C under normal pressure, or all organic compounds with a vapor pressure greater than or equal to 10 Pa and volatility at 20°C; they will react under the action of light and heat to form ozone, which has an irreversible impact on the atmospheric environment. By using oil-gas recovery technology to recover the oil gas emitted during the storage, transportation, loading and unloading of oil products, on the one hand, it can prevent air pollution caused by oil gas volatilization and eliminate potential safety hazards, and on the other hand, it can also reduce economic losses by improving the energy utilization rate and obtain considerable economic returns.

[0005] According to different production links, oil-gas recovery can be divided into primary, secondary and tertiary recovery. Tertiary oil-gas recovery refers to the process of re-recovering and treating the oil gas generated during the refueling process in gas stations, oil depots and other places. Tertiary recovery is less used in actual applications. Its main recovery methods include adsorption method, absorption method, condensation method, etc. The current mainstream tertiary recovery method is the adsorption method of adsorbing oil gas through materials such as activated carbon and silica gel. If not properly treated after use, solid waste emissions will be generated.

[0006] When the gas temperature is cooled to -30°C to -50°C, nearly half of the hydrocarbon substances in the recoverable oil gas can be recovered. To sum up, at present, there are both hydrogen pre-cooling requirements and oil-gas tertiary recovery condensation requirements in the oil-hydrogen combined station, but the new hydrogen filling opportunity will lead to an increase in the construction economic cost and space cost.

[0007] Although there are related inventions such as CN114893720B and CN118122086A around the problem of how to improve the efficiency of hydrogen pre-cooling and oil-gas tertiary recovery, the focus of their inventions is on how to improve the efficiency of a single process, rather than considering how to combine the two processes to reduce the refrigeration load of the hydrogenation mechanism.

[0008] The precooling temperature of the hydrogen precooling device in the oil-hydrogen integrated station can meet the condensation temperature requirements of the tertiary recovery of oil and gas; in the oil-hydrogen integrated station, through the reasonable scheduling of the precooling device, the dual use of the hydrogen precooling device can be achieved, thereby improving the energy and equipment utilization efficiency of the oil-hydrogen integrated station.

[0009] Therefore, how to improve the existing system to enhance the efficiency of energy and equipment utilization has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0010] In view of the above-mentioned defects of the prior art, the utility model provides a common device for oil and gas condensation separation and hydrogenation pre-cooling in an oil-hydrogen combined station, the purpose of which is to use the hydrogen pre-cooling device in the station to provide cold energy for the tertiary recovery of oil and gas, thereby avoiding atmospheric pollution caused by oil and gas volatilization and reducing economic losses, and improving the utilization efficiency of energy and equipment in the station.

[0011] To achieve the above-mentioned purpose, the utility model discloses a common device for oil-gas condensation separation and hydrogenation precooling in an oil-hydrogen combined station, comprising a hydrogen storage device and an oil storage device; the hydrogen storage device is sequentially connected to the high-temperature side of a hydrogen heat exchanger, a hydrogenator and a hydrogen filling device; a cooling coil is externally arranged on the oil storage device; an oil storage temperature detection sensor is arranged at the outlet of the cooling coil.

[0012] Wherein, a hydrogen temperature detection sensor is provided between the hydrogen heat exchanger and the hydrogenator;

[0013] The low temperature side of the hydrogen heat exchanger is connected to the low temperature side of the oil tank heat exchanger and the refrigerator in sequence to form a cycle;

[0014] The high temperature side of the oil tank heat exchanger is connected to the booster pump and the cooling coil in sequence to form a circulation;

[0015] Both ends of the low temperature side of the oil tank heat exchanger are connected to a second short-circuit bypass;

[0016] A second three-way valve is provided between the second short-circuit bypass and the input end of the low-temperature side of the oil tank heat exchanger.

[0017] Preferably, both ends of the low temperature side of the hydrogen heat exchanger are connected to a first short-circuit bypass;

[0018] A first three-way valve is provided between the first short-circuit bypass and the input end of the low-temperature side of the hydrogen heat exchanger.

[0019] Beneficial effects of the utility model:

[0020] The utility model realizes the dual use of the existing hydrogen precooling device in the oil-hydrogen combined station, thereby improving the energy and equipment utilization efficiency of the oil-hydrogen combined station.

[0021] The utility model improves the utilization rate of the refrigeration device in the oil-hydrogen combined station and reduces the energy consumption in the station; it realizes the three-time recovery of oil and gas in the gas station through the condensation method and reduces the solid waste emission. It improves the utilization efficiency of the refrigeration machine in the oil-hydrogen combined station, reduces the equipment investment in the station construction, is conducive to the construction of compact oil-hydrogen combined stations, and reduces the atmospheric pollution caused by the volatilization of oil and gas.

[0022] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0024] Example

[0025] like Figure 1 As shown, the oil-gas condensation separation and hydrogenation pre-cooling common device of the oil-hydrogen combined station includes a hydrogen storage device 1 and an oil storage device 2; the hydrogen storage device 1 is connected to the high-temperature side of the hydrogen heat exchanger 3, the hydrogenator 4 and the hydrogen filling device 5 in sequence; a cooling coil is provided outside the oil storage device 2; and an oil storage temperature detection sensor 10 is provided at the outlet of the cooling coil.

[0026] Among them, a hydrogen temperature detection sensor 6 is provided between the hydrogen heat exchanger 3 and the hydrogenator 4;

[0027] The high temperature side of the oil tank heat exchanger 7 is connected to the booster pump 8 and the cooling coil in sequence to form a circulation;

[0028] Both ends of the low temperature side of the oil tank heat exchanger 7 are connected to the second short-circuit bypass 14;

[0029] A second three-way valve 12 is provided between the second short-circuit bypass 14 and the input end of the low-temperature side of the oil tank heat exchanger 7 .

[0030] Both ends of the low temperature side of the hydrogen heat exchanger 3 are connected to the first short-circuit bypass 13;

[0031] A first three-way valve 11 is provided between the first short-circuit bypass 13 and the input end of the low-temperature side of the hydrogen heat exchanger 3 .

[0032] The utility model optimizes the cooling circulation system on the basis of the existing refrigeration system infrastructure construction. When the first short-circuit bypass 13 does not exist, or the first three-way valve 11 is switched to the left-in and right-out state, and the second short-circuit bypass 14 does not exist, or the second three-way valve 12 is switched to the left-in and right-out state, the coolant output by the refrigerator 9 passes through the hydrogen heat exchanger 3 and the oil tank heat exchanger 7. At this time, the refrigerator provides cold energy for the hydrogen heat exchanger 3 and the oil tank heat exchanger 7 at the same time.

[0033] When the second three-way valve 12 is switched to the left-in and right-out state, the booster pump 8 starts working at the same time, and the oil tank heat exchanger 7 provides cold energy for the oil tank.

[0034] The refrigerator 9 can provide cold energy for the oil storage device 2 for tertiary recovery while precooling the hydrogen.

[0035] When there is no first short-circuit bypass 13 or the first three-way valve 11 is switched to the left-in and right-out state, and there is no second short-circuit bypass 14 or the second three-way valve 12 is switched to the left-in and right-out state, the coolant passes through the hydrogen heat exchanger 3 and the oil tank heat exchanger 7. At this time, the refrigerator provides cold energy for the hydrogen heat exchanger 3 and the oil tank heat exchanger 7 at the same time.

[0036] When the first short-circuit bypass 13 does not exist or the first three-way valve 11 is switched to the left-in and right-out state, and the second three-way valve 12 is switched to the left-in and top-out state, that is, when the low-temperature side of the oil tank heat exchanger 7 is short-circuited, the refrigerant only passes through the hydrogen heat exchanger 3, and the refrigerator 9 only realizes pre-cooling for the hydrogenator.

[0037] When the first three-way valve 11 is switched to the left-in and bottom-out state, and there is no second short-circuit bypass 14 or the second three-way valve 12 is switched to the left-in and right-out state, that is, when the low-temperature side of the hydrogen heat exchanger 3 is short-circuited, the coolant only passes through the oil tank heat exchanger 7, and the refrigerator provides cold energy for the oil tank heat exchanger 7.

[0038] In addition, among the oil storage temperature detection sensor 10 and the hydrogen temperature detection sensor 6, the hydrogen temperature detection sensor 6 can monitor the pre-cooling temperature of the hydrogenation machine, and the oil storage temperature detection sensor 10 can monitor the tertiary oil and gas recovery temperature of the oil tank, and reasonable control of the system temperature can be achieved through the combination of temperature feedback and manual operation.

[0039] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A common device for oil-gas condensation separation and hydrogenation precooling in an oil-hydrogen combined station, comprising a hydrogen storage device (1) and an oil storage device (2); the hydrogen storage device (1) is connected to the high-temperature side of a hydrogen heat exchanger (3), a hydrogenator (4) and a hydrogen filling device (5) in sequence; the oil storage device (2) is provided with a cooling coil outside; the outlet of the cooling coil is provided with an oil storage temperature detection sensor (10); characterized in that, A hydrogen temperature detection sensor (6) is provided between the hydrogen heat exchanger (3) and the hydrogenator (4); The low temperature side of the hydrogen heat exchanger (3) is connected to the low temperature side of the oil tank heat exchanger (7) and the refrigerator (9) in sequence to form a cycle; Both ends of the low temperature side of the oil tank heat exchanger (7) are connected to a second short-circuit bypass (14); A second three-way valve (12) is provided between the second short-circuit bypass (14) and the input end of the low-temperature side of the oil tank heat exchanger (7).

2. The oil-gas condensation separation and hydrogenation precooling common device for the oil-hydrogen combined station according to claim 1 is characterized in that: Both ends of the low temperature side of the hydrogen heat exchanger (3) are connected to a first short-circuit bypass (13); A first three-way valve (11) is provided between the first short-circuit bypass (13) and the input end of the low-temperature side of the hydrogen heat exchanger (3).

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