High-pressure large-flow nitrogen pressurizing and gasifying skid-mounted equipment

Abstract

The utility model provides high-pressure large-flow nitrogen pressurizing gasification skid-mounted equipment, which comprises a storage tank, a high-pressure buffer tank, an increasing pump, a gasifier, a gas cylinder group and a pipeline system, the storage tank, the high-pressure buffer tank, the increasing pump, the gasifier and the gas cylinder group are arranged on the same base to form a skid, the pipeline system is sequentially connected with the storage tank, the high-pressure buffer tank, the booster pump, the gasifier and the gas cylinder group, and the gas cylinder group is connected with a nitrogen output end. By arranging the low-temperature storage tank with the container matched with the gas supply requirement, the high-pressure buffer tank capable of guaranteeing stable nitrogen gas source supply, the gas cylinder set, the stable gas pressure and gas flow of a vaporization pipeline and a gas supply end, the gas pressure change impact of the pipeline and a valve piece is reduced, the safety of a gas supply pipeline system is guaranteed, and the use loss of the valve piece and the like is reduced; the maintenance time and the use cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure nitrogen gasification and pressurization integrated equipment, and in particular to a high-pressure and large-flow nitrogen gas pressurization and gasification skid-mounted equipment. Background Art

[0002] With the rapid development of domestic pressure vessels, industrial gases, semiconductors and other industries in recent years, the demand for high-purity and high-pressure nitrogen systems and equipment required for the manufacturing process of the above products has continued to expand, and the demand for various types of gasification and pressurization systems that match the actual use environment has become diversified, which has put forward new requirements for the design and manufacture of such equipment, especially for the urgent demand for high-pressure and large-flow nitrogen gasification and pressurization systems.

[0003] In order to meet the high-purity and stable nitrogen supply required for production, the common equipment configuration is a gas supply mode of nitrogen low-temperature storage tank + vaporizer and connecting pipelines; in some environments with restricted site restrictions, the above equipment is integrated into one manufacturing to solve the problem of low-pressure and low-flow gas supply; if there is a demand for gas supply pressure, a pump is added on the basis of the above equipment configuration to realize the integrated function of gasification and pressurization.

[0004] At present, the nitrogen gasification and boosting skid-mounted equipment / gas supply system is equipped with corresponding low-temperature storage tanks, gasifiers, booster pumps, connecting pipes and control electrical appliances according to the gas supply process route, which meets the demand for small and medium-sized high-purity nitrogen gas supply, and generally provides a stable gas use environment. For nitrogen equipment / systems with a maximum operating pressure of 50MPa and a maximum flow rate of 500L / h, the gas supply system relies solely on mobile storage tanks for gas supply. The stability of the gas supply system is poor, the gas supply efficiency is low, and the flow rate is unstable, resulting in low production efficiency, and the equipment's pipeline system, especially the control valves and booster components, suffers large losses due to unstable gas pressure, affecting the stable operation of the equipment and increasing the cost of use.

[0005] At the same time, for ultra-high pressure, large flow high-purity nitrogen supply usage scenarios, the existing technology still has the problem of low site utilization. Summary of the invention

[0006] In view of this, the utility model aims to propose a high-pressure and large-flow nitrogen boosting gasification skid-mounted equipment to solve the problems of poor stability, low gas supply efficiency, unstable flow and high production cost of ultra-high pressure and large-flow high-purity nitrogen supply systems in the prior art.

[0007] The technical solution of the utility model is implemented as follows: a high-pressure and large-flow nitrogen boosting and gasification skid-mounted equipment, including a storage tank, a high-pressure buffer tank, an increasing pump, a vaporizer, a gas cylinder group and a pipeline system, wherein the storage tank, the high-pressure buffer tank, the increasing pump, the vaporizer and the gas cylinder group are arranged on the same base to form a skid, the pipeline system sequentially connects the storage tank, the high-pressure buffer tank, the increasing pump, the vaporizer and the gas cylinder group, and the gas cylinder group is connected to the nitrogen output end.

[0008] Furthermore, the storage tank is a low-temperature horizontal storage tank, adopting a high-vacuum multi-layer insulation structure, and the volume of the storage tank is not less than 18.5m 3 .

[0009] Furthermore, the high-pressure buffer tank is a vertical stainless steel high-pressure gas storage tank, the volume of the high-pressure buffer tank is not less than 500L, and the pumping rate of the high-pressure buffer tank is not less than 500L / h.

[0010] Furthermore, the gasifier is an air-temperature gasifier or an electrically heated gasifier.

[0011] Furthermore, the gas cylinder group is provided with a plurality of gas cylinders, and the working pressure of the gas cylinder group is not less than 50MPa.

[0012] Furthermore, a lifting check valve is provided between the increasing pump and the gasifier, and between the gas cylinder group and the nitrogen output end.

[0013] Furthermore, safety valves are provided between the storage tank and the high-pressure buffer tank, between the high-pressure buffer tank and the boosting pump, between the boosting pump and the vaporizer, and between the vaporizer and the gas cylinder group.

[0014] Furthermore, a reflux pipe is provided between the high-pressure buffer tank and the boosting pump, and the high-pressure buffer tank is provided with a discharge pipe.

[0015] Furthermore, the pipeline system between various parts is provided with gate valves or rolling gate valves.

[0016] Furthermore, it also includes an electrical control cabinet for controlling the gas supply pressure and gas flow.

[0017] Compared with the prior art, the high-pressure and high-flow nitrogen boosting gasification skid-mounted equipment of the utility model has the following advantages:

[0018] 1. The utility model can ensure a stable nitrogen gas source supply by configuring a low-temperature storage tank that is adapted to the gas supply demand, a high-pressure buffer tank and a gas cylinder group, stabilize the gas pressure and gas flow of the vaporization pipeline and the gas supply end, reduce the impact of gas pressure changes on the pipeline and valves, ensure the safety of the gas supply pipeline system, reduce the use loss of valves, etc., and reduce maintenance time and use costs.

[0019] 2. The utility model meets the pressure and gas flow requirements of the gas supply system by configuring and using a vaporizer that is compatible with ultra-high pressure and large flow, reduces the impact of low-temperature nitrogen condensation on the safety and flow of connecting pipelines, and also reduces the loss of exhaust and decompression gas caused by offset flow and pressure changes, maximizes the use of nitrogen, and reduces the gas loss rate.

[0020] 3. The utility model configures an electrical control cabinet with optimized control, and can input gas supply pressure and gas flow data according to process requirements to achieve adjustable gas supply mode, control nitrogen input and output, and detect pressure and gas flow data at key points. When overpressure and overflow occur, it will automatically alarm and cut off the control pipeline valve to ensure the safety and stability of the rectified gas supply system.

[0021] 4. The skid-mounted equipment integrates all key components on a skid, greatly reducing the footprint and installation workload. The compact design makes the overall appearance of the equipment neat and easy to transport and move. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 It is a schematic structural diagram of the skid-mounted equipment for high-pressure and high-flow nitrogen boosting and gasification according to the present invention.

[0024] Description of reference numerals:

[0025] 1. Storage tank; 2. Electrical control cabinet; 3. High-pressure buffer tank; 4. Gas cylinder group; 5. Gasifier; 6. Additional pump; 7. Pipeline system. DETAILED DESCRIPTION

[0026] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0027] It should be noted that all terms used in the present invention to indicate direction and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative position relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The utility model discloses a high-pressure and large-flow nitrogen boosting and gasification skid-mounted equipment, comprising a storage tank 1, a high-pressure buffer tank 3, an additional pump 6, a vaporizer 5, a gas cylinder group 4 and a pipeline system 7. The storage tank 1, the high-pressure buffer tank 3, the additional pump 6, the vaporizer 5 and the gas cylinder group 4 are arranged on the same base to form a skid block. The pipeline system 7 sequentially connects the storage tank 1, the high-pressure buffer tank 3, the additional pump 6, the vaporizer 5 and the gas cylinder group 4, and the gas cylinder group 4 is connected to a nitrogen output end.

[0031] After the nitrogen cryogenic tank truck injects nitrogen into the storage tank 1, each part of the skid-mounted equipment is inspected and tested for air tightness, then the connection valve between the storage tank 1 and the nitrogen booster skid-mounted equipment is opened to start gas supply, and the low-temperature nitrogen flows into the high-pressure buffer tank. After reaching a certain pressure, the pump 6 starts working and transports the pressurized nitrogen to the vaporizer 5 and the gas cylinder group 4 in turn, and finally outputs the nitrogen through the nitrogen output end, realizing ultra-high pressure 0-50MPa and high-purity nitrogen supply with a maximum gas supply flow of 500L / h.

[0032] The setting container is adapted to the gas supply demand, including low-temperature storage tanks, high-pressure buffer gas pipes, gas cylinder groups and vaporizers adapted to ultra-high pressure and large flow, which stabilize the gas pressure and gas flow of the vaporization pipeline and the gas supply end, reduce the impact of gas pressure changes on the pipeline and valves, meet the pressure and gas flow requirements of the gas supply system, reduce the impact of low-temperature nitrogen condensation on the safety and flow of connecting pipelines, and reduce the loss of exhaust pressure relief gas caused by offset flow and pressure changes, help to maximize the utilization of nitrogen, reduce the gas loss rate, ensure a stable nitrogen gas source supply, ensure the safety of the gas supply pipeline system, reduce the use loss of valves, etc., and reduce maintenance time and use costs; at the same time, the skid-mounted equipment integrates all key components on a skid, which greatly reduces the footprint and installation workload, and the compact design makes the overall appearance of the equipment neat and easy to transport and move.

[0033] Specifically, the storage tank 1 is a low-temperature horizontal storage tank, which adopts a high-vacuum multi-layer insulation structure, and the volume of the storage tank 1 is not less than 18.5m 3 The storage tank 1 is a cryogenic tank, which can better keep the nitrogen in liquid state, help reduce the volume of the device, reduce the weight of the skid-mounted equipment, and save costs; at the same time, the high vacuum multi-layer insulation structure can reduce heat transfer and better maintain the cryogenic state of liquid nitrogen.

[0034] Specifically, the high-pressure buffer tank 3 is a vertical stainless steel high-pressure gas storage tank, the volume of the high-pressure buffer tank 3 is not less than 500L, and the pumping rate of the high-pressure buffer tank 3 is not less than 500L / h. The high-pressure buffer tank 3 can maintain a large enough space to temporarily store and buffer the nitrogen pressure, so that it can withstand a certain working pressure, maintain stable pressure output and flow output, and meet the use requirements of high-pressure and large-flow output.

[0035] Specifically, the gasifier 5 is an air temperature gasifier or an electric heating gasifier. The gasifier 5 can meet the system's requirements for nitrogen gasification speed, ensure the stability of nitrogen output, and help improve the stability and reliability of the skid-mounted equipment.

[0036] Preferably, the vaporizer 5 is an electrically heated vaporizer. This configuration can achieve a faster nitrogen gasification speed and a maximum gas supply flow rate of 500 L / h of high-purity nitrogen gas.

[0037] Specifically, the gas cylinder group 4 is provided with multiple gas cylinders, and the working pressure of the gas cylinder group 4 is not less than 50MPa. The provision of multiple gas cylinders can ensure that when the nitrogen is supplied at high pressure, the quantity can be set according to demand to ensure the requirement of a maximum gas supply flow rate of 500L / h; at the same time, the use of multiple gas cylinders in parallel can enable the skid-mounted equipment to directly use existing gas cylinders, avoiding the design and production of large-capacity gas cylinders, which helps to reduce production costs and manufacturing difficulties.

[0038] Specifically, the output end of the storage tank 1 is flange-connected to the pipeline system 7. The flange connection is easy to install and disassemble, has good sealing performance, can adapt to pipes and storage tanks of various materials, diameters and wall thicknesses, can withstand a large working pressure and temperature range, and ensures the reliability and stability of the connection.

[0039] Specifically, a lifting check valve is provided between the additional pump 6 and the vaporizer 5, and between the gas cylinder group 4 and the nitrogen output end. This setting can prevent the backflow of the fluid medium in the pipeline. When the pump stops working or the pressure at the output end of the vaporizer or the gas cylinder group decreases, the lifting check valve can automatically close, effectively preventing the medium from flowing in reverse, protecting subsequent equipment and pipelines from the influence of the diversion medium, and ensuring the stable operation of the entire device.

[0040] Specifically, safety valves are provided between the storage tank 1 and the high-pressure buffer tank 3 , between the high-pressure buffer tank 3 and the increasing pump 6 , between the increasing pump 6 and the vaporizer 5 , and between the vaporizer 5 and the gas cylinder group 4 .

[0041] When the internal pressure of the device rises to the set value of the safety valve due to some reason, such as thermal expansion of the medium, pump or vaporizer failure, the safety valve will automatically open and release part of the medium to reduce the system pressure, ensuring the safe operation of the equipment, helping to improve the stability and reliability of the device and reduce the risk of accidents.

[0042] Specifically, a reflux pipe is provided between the high-pressure buffer tank 3 and the additional pump 6, and a discharge pipe is provided in the high-pressure buffer tank 3. This arrangement improves the stability of the entire device, facilitates the device to flexibly adjust the system pressure and flow under different working conditions, and ensures that the system can operate stably under various conditions; at the same time, it can effectively prevent the equipment from being damaged or other safety accidents due to overpressure, which helps to ensure the safety of personnel and equipment during the production process.

[0043] Specifically, the pipeline system 7 between each part is provided with a gate valve or a rolling gate valve. This setting can completely cut off the medium in the pipeline, ensure the fluid control accuracy of the pipeline system, effectively prevent a large amount of medium in the pipeline from leaking out, and ensure the overall safety of the device; and it is simple to operate, convenient to maintain, and reduces production costs.

[0044] Specifically, the pipeline system 7 is provided with a pressure sensor and a flow sensor for accurately controlling the gas flow in the pipeline system 7. This setting can detect the changes in gas pressure and gas flow in the pipeline system in real time, ensure the accuracy and real-time nature of the data, provide a reliable basis for accurate control, help maintain the stable operation of the device, prevent the occurrence of device failures, and improve the reliability and safety of the device; at the same time, it can optimize energy efficiency and facilitate maintenance and management.

[0045] Specifically, the pipeline system 7 is made of stainless steel. The pipeline system has the advantages of low temperature resistance, high pressure resistance and corrosion resistance, which not only improves the stability and safety of the device, but also reduces the operating cost and maintenance difficulty, and provides a reliable guarantee for adapting to various working conditions.

[0046] Specifically, it also includes an electrical control cabinet 2 for controlling the gas supply pressure and gas flow. This setting enables the device to effectively control the gas pressure and gas flow, achieve more precise control, and have a higher overall degree of automation and better safety.

[0047] Working principle: After the nitrogen cryogenic tank truck injects nitrogen into the storage tank 1, each part of the skid-mounted equipment is inspected and tested for air tightness, then the connection valve between the storage tank 1 and the nitrogen booster skid-mounted equipment is opened to start gas supply, and the low-temperature nitrogen flows into the high-pressure buffer tank. After reaching a certain pressure, the pump 6 starts working and transports the pressurized nitrogen to the vaporizer 5 and the gas cylinder group 4 in turn, and finally outputs the nitrogen through the nitrogen output end, realizing ultra-high pressure 0-50MPa and maximum gas supply flow rate 500L / h high-purity nitrogen supply.

[0048] Example 1

[0049] Taking the airtightness test operation process of a nitrogen bundle container with a supply length of 20 feet, a water volume of 9m3 and a working pressure of 45MPa as an example, the operation and use process of the high-pressure and large-flow nitrogen boosting gasification skid-mounted equipment is briefly introduced:

[0050] 1) Before use, check whether the equipment's electrical, piping, and instruments are normal, and whether the pressure gauge, safety valve, pressure transmitter, etc. are within the validity period;

[0051] 2) Use a nitrogen cryogenic tank truck to inject no less than 14.5m3 of liquid nitrogen into the fixed horizontal cryogenic storage tank supporting the equipment;

[0052] 3) Turn on the power of the equipment, input the airtight test pressure and flow rate and the pressure-boosting process requirement data information in the control cabinet according to the process requirements of the nitrogen bundle container airtight test, and check whether the equipment instruments and connecting pipes and valves are open normally or in normal state;

[0053] 4) Open the connection valves of the cryogenic storage tank and the nitrogen booster skid-mounted equipment, start 0-5MPa low-pressure gas supply, boosting, gasification, and nitrogen input, and observe whether the equipment gas pipeline and control instruments are normal during this period;

[0054] 5) 5-30MPa gas supply, in low pressure and high flow mode;

[0055] 6) 30MPa-45MPa gas supply, supply gas in high pressure and small flow mode, closely monitor the data information of booster pump and control instrument, when the process pressure reaches 45MPa, close the connecting valve between the equipment and the gas supply test product, and start the pressure maintenance of the airtight test;

[0056] 7) After the nitrogen tube bundle container product airtightness test pressure maintenance is completed, close the connecting valve between the cryogenic storage tank and the nitrogen pressurized gasification skid-mounted equipment, open the connecting valve between the equipment and the test product, and then open the pressure relief valve to release the pressure until the surface pressure on the pipeline and product reaches 0.5MPa;

[0057] 8) Close the valve of the nitrogen tube bundle container product, and then disconnect the connecting pipeline between the nitrogen pressurization gasification skid-mounted equipment and the test product;

[0058] 9) Turn off the electrical and low-pressure air switches of the nitrogen booster gasification skid-mounted equipment, and the test is completed.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure and high-flow nitrogen boosting gasification skid-mounted equipment, characterized in that: The invention comprises a storage tank (1), a high-pressure buffer tank (3), an increasing pump (6), a vaporizer (5), a gas cylinder group (4) and a pipeline system (7); the storage tank (1), the high-pressure buffer tank (3), the increasing pump (6), the vaporizer (5) and the gas cylinder group (4) are arranged on the same base to form a skid; the pipeline system (7) sequentially connects the storage tank (1), the high-pressure buffer tank (3), the increasing pump (6), the vaporizer (5) and the gas cylinder group (4); and the gas cylinder group (4) is connected to a nitrogen output end.

2. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: The storage tank (1) is a low-temperature horizontal storage tank, adopting a high-vacuum multi-layer insulation structure, and the volume of the storage tank (1) is not less than 18.5m 3 .

3. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 2 is characterized in that: The high-pressure buffer tank (3) is a vertical stainless steel high-pressure gas storage tank, the volume of the high-pressure buffer tank (3) is not less than 500L, and the air extraction rate of the high-pressure buffer tank (3) is not less than 500L / h.

4. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: The gasifier (5) is an air-temperature gasifier or an electric heating gasifier.

5. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 4 is characterized in that: The gas cylinder group (4) is provided with a plurality of gas cylinders, and the working pressure of the gas cylinder group (4) is not less than 50 MPa.

6. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: A lifting check valve is provided between the boosting pump (6) and the gasifier (5), and between the gas cylinder group (4) and the nitrogen output end.

7. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: Safety valves are provided between the storage tank (1) and the high-pressure buffer tank (3), between the high-pressure buffer tank (3) and the boosting pump (6), between the boosting pump (6) and the vaporizer (5), and between the vaporizer (5) and the gas cylinder group (4).

8. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: A reflux pipe is provided between the high-pressure buffer tank (3) and the boosting pump (6), and the high-pressure buffer tank (3) is provided with a discharge pipe.

9. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: The pipeline system (7) between various parts is provided with gate valves or rolling gate valves.

10. The high-pressure and high-flow nitrogen boosting and gasification skid-mounted equipment according to claim 1 is characterized in that: It also includes an electrical control cabinet (2) for controlling the gas supply pressure and gas flow.

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