Low-dew-point intelligent air-nitrogen system

Abstract

The embodiment of the invention discloses a low-dew-point intelligent air-nitrogen system which comprises an air compression assembly, an air supply assembly and a control assembly. The air inlet end of the pretreatment assembly is connected with the air outlet end of the air compression assembly, and the pretreatment assembly is used for purifying and drying the compressed air; the gas inlet end of the nitrogen making assembly is connected with the gas outlet end of the pretreatment assembly, and the nitrogen making assembly is used for making nitrogen; the gas inlet end of the gas conveying pipeline is connected with the gas outlet end of the nitrogen generation assembly, and the gas outlet end of the gas conveying pipeline is used for being connected with equipment to be supplied with gas; and the conveying regulator is arranged on the gas conveying pipeline. The intelligence of the air-nitrogen system is improved, and the quality of finally blown nitrogen is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of nitrogen production, and in particular to a low dew point intelligent air nitrogen system. Background Art

[0002] With the development of the oil industry, oil reserves are decreasing year by year, and oil extraction is becoming more and more difficult. Nearly 2 / 3 of crude oil is locked underground because it cannot be extracted once or twice. Exploring more efficient and environmentally friendly new methods and technologies has become an inevitable trend in the development of the times.

[0003] After comparison and exploration in recent years, nitrogen has attracted more and more attention due to its easy availability, relative inactivity, and effective cooling of the engine head. Nitrogen injection technology is not only applicable to conventional oil reservoirs, but also to thin oil, heavy oil, offshore, hilly, deep oil, nearly exhausted oil reservoirs or oil reservoirs in the early stages of development. In addition, since nitrogen is insoluble in oil and water and has a wide source, it is also mainly used for secondary and tertiary oil recovery, drilling, completion, oil and gas well protection, pressure maintenance and gas storage, inert protection of drilling platforms, purging of pipelines and equipment, and protective gas for the transportation of flammable and explosive items.

[0004] In recent years, with the resource reorganization of major oil and gas field groups at home and abroad and the upgrading and utilization of oil injection and production processes, the existing air-nitrogen system has problems with low efficiency and quality.

[0005] There is no effective solution to the above problems in the prior art. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a low dew point intelligent air-nitrogen system, which improves the quality of nitrogen by intelligently designing the system, so as to solve the problems of low efficiency and low quality of the air-nitrogen system in the prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides a low dew point intelligent air nitrogen system, comprising: an air compression component, the air compression component is used to provide compressed air; a pretreatment component, the air inlet end of the pretreatment component is connected to the air outlet end of the air compression component, and is used to purify and dry the compressed air; a nitrogen production component, the air inlet end of the nitrogen production component is connected to the air outlet end of the pretreatment component, and is used to produce nitrogen; a gas transmission pipeline, the air inlet end of the gas transmission pipeline is connected to the air outlet end of the nitrogen production component, and the air outlet end is used to connect to the gas supply equipment; a delivery regulator, and the delivery regulator is arranged on the gas transmission pipeline.

[0008] Further optionally, there are at least two nitrogen production components, one of which is an operating nitrogen production component and the other is a standby nitrogen production component.

[0009] Further optionally, a standby machine control module is electrically connected to the operating nitrogen production component and the standby nitrogen production component, and is used to start the standby nitrogen production component when the required flow rate is greater than a preset flow rate.

[0010] Further optionally, it also includes: a self-supporting regulating valve, which is arranged on the detection pipeline in the gas transmission pipeline for stabilizing the pressure.

[0011] Further optionally, it also includes: a feedback regulation component: the feedback regulation component includes a pressure gauge and an automatic controller; the pressure gauge is arranged on the pipeline at the air outlet end of the pretreatment component, and is used to measure the air pressure; the automatic controller is electrically connected to the pressure gauge, the air inlet valve of the nitrogen production component and the air compression component, and is used to control the closing of the air inlet valve and increase the compression force of the air compression component when the air pressure detected by the pressure gauge is lower than the predetermined air pressure.

[0012] Further optionally, the air compression component includes an air compressor and a compressed air storage tank.

[0013] Further optionally, the pretreatment component includes a high-temperature combined dryer and a filter group.

[0014] Optionally, it further includes: an instrumentation and control interlock, which is electrically connected to each component and is used to control each component.

[0015] The above technical solution has the following beneficial effects: reducing human operating errors and improving system operation efficiency through automated control; enhancing system stability, automatically adjusting and responding to changes, and maintaining the continuity of nitrogen supply; the backup nitrogen production components and self-supporting regulating valves ensure seamless switching when the main system fails, ensuring continuous gas supply and improving system reliability; reducing maintenance costs, the system's automation and monitoring functions simplify maintenance work, reducing maintenance costs and downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a low dew point intelligent air-nitrogen system provided in an embodiment of the present invention.

[0018] Figure numerals: 1-air compression component; 101-air compressor; 102-compressed air storage tank; 2-pretreatment component; 3-nitrogen production component; 4-gas transmission pipeline; 5-transmission regulator. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to solve the problems in the prior art, the embodiment of the present invention provides a low dew point intelligent air nitrogen system. Figure 1 is a schematic diagram of the structure of a low dew point intelligent air-nitrogen system provided by an embodiment of the present invention. Figure 1 As shown, the system includes: an air compression component 1, which is used to provide compressed air; a pretreatment component 2, the air inlet end of the pretreatment component 2 is connected to the air outlet end of the air compression component 1, and is used to purify and dry the compressed air; a nitrogen production component 3, the air inlet end of the nitrogen production component 3 is connected to the air outlet end of the pretreatment component 2, and is used to produce nitrogen; a gas transmission pipeline 4, the air inlet end of the gas transmission pipeline 4 is connected to the air outlet end of the nitrogen production component 3, and the air outlet end is used to connect to the gas supply equipment; a delivery regulator 5, and the delivery regulator 5 is arranged on the gas transmission pipeline 4.

[0021] The system includes an air compression component 1, which is responsible for providing compressed air. The air compressor 101 is the core part of the system, which compresses air at atmospheric pressure to the required pressure level.

[0022] The air inlet of the pretreatment component 2 is connected to the air outlet of the air compression component 1. The component is used to purify and dry the compressed air to remove impurities and moisture therein to ensure the quality of the gas during the nitrogen production process.

[0023] The air inlet of the nitrogen production component 3 is connected to the air outlet of the pretreatment component 2 for producing nitrogen. The component uses adsorption or membrane separation technology to separate nitrogen from the pretreated compressed air.

[0024] The gas inlet end of the gas pipeline 4 is connected to the gas outlet end of the nitrogen production component 3, and the gas outlet end is used to connect the equipment to be supplied with gas. The gas pipeline 4 is responsible for transporting the produced nitrogen to the required equipment or system.

[0025] The delivery regulator 5 is arranged on the gas delivery pipeline 4 to adjust the flow rate and pressure of nitrogen to meet the gas demand of different equipment. The gas delivery regulator can adjust the flow rate and pressure online, design high and low control feedback points, and automatically control the gas delivery state associated with each gas parameter to meet the gas demand of different processes.

[0026] As an optional implementation, the delivery regulator 5 includes a flow meter, a barometer, a regulating valve and a controller, wherein the flow meter and the barometer monitor the nitrogen flow and pressure in the gas pipeline 4 in real time, and transmit the monitored data to the controller, which compares the flow threshold and the pressure threshold according to the preset value, calculates the amount to be adjusted, and then adjusts the opening of the regulating valve according to the adjustment amount to realize gas supply control. The preset value is set according to the gas supply equipment.

[0027] As an optional implementation, there are at least two nitrogen production components 3 , one of which is an operating nitrogen production component 3 , and the other is a standby nitrogen production component 3 .

[0028] At least two nitrogen production components 3 are set in the system. This configuration includes an operating nitrogen production component 3 and a standby nitrogen production component 3, both of which are connected to the pretreatment component 2 and the gas pipeline 4 through pipelines. When the operating nitrogen production component 3 fails or requires maintenance, the standby nitrogen production component 3 can be put into use immediately to ensure that the system can continuously and stably supply gas and reduce the risk of production interruption. In addition, this configuration also allows the system to flexibly switch the nitrogen production component 3 according to the actual gas demand, or to run two nitrogen production components 3 at the same time to provide a larger nitrogen output under high demand conditions.

[0029] As an optional implementation, the standby machine control module is electrically connected to the running nitrogen production component 3 and the standby nitrogen production component 3, and is used to start the standby nitrogen production component 3 when the required flow rate is greater than the preset flow rate.

[0030] The standby machine control module is connected to the running nitrogen production component 3 and the standby nitrogen production component 3 through electrical connection, and monitors the operating status of the system in real time. The module is equipped with a flow monitoring and control system, which can compare the output flow of the main nitrogen production component 3 with the preset flow threshold. When it is detected that the output flow of the main nitrogen production component 3 cannot meet the gas demand of the downstream equipment, that is, the actual flow is lower than the preset flow, the standby machine control module will automatically start the standby nitrogen production component 3 to increase the supply of nitrogen.

[0031] According to the required gas flow, purity and pressure range, when the downstream gas demand changes, according to the gas consumption of the instrument air system when the downstream nitrogen flow increases sharply, when the real-time instrument air system uses compressed air, the flow rate is ≤580Nm3 / h, the second nitrogen generator can be automatically opened to produce nitrogen, increasing part of the nitrogen production to meet the downstream nitrogen demand. When the total nitrogen production capacity is 1050Nm3 / h, the two nitrogen generators operate stably.

[0032] As an optional implementation, the system further includes: a self-supporting regulating valve, which is arranged on the detection pipeline in the gas transmission pipeline 4 and is used for pressure stabilization.

[0033] A self-operating regulating valve is an automatic regulating valve that can work independently without external energy. It senses the pressure changes in the pipeline through the internal mechanical structure and automatically adjusts the valve opening to maintain constant pressure. The design of this valve usually includes a spring-loaded disc, one side of the disc is connected to the pipeline pressure and the other side is against the spring force. When the pipeline pressure changes, the disc will move to offset the pressure change, thereby maintaining the set pressure level.

[0034] The installation position of the self-supporting regulating valve is usually located on the detection pipeline of the gas pipeline 4, so that the pressure can be monitored and adjusted without affecting the main gas flow. The design and selection of this valve need to consider the maximum flow, maximum pressure and required pressure regulation range of the system to ensure that it can work effectively under various working conditions. By adding a self-supporting regulating valve to the system, the stability and safety of the air-nitrogen system can be significantly improved to meet the strict requirements in industrial applications.

[0035] As an optional embodiment, the system also includes: a feedback regulation component: the feedback regulation component includes a pressure gauge and an automatic controller; the pressure gauge is arranged on the pipeline at the air outlet end of the pretreatment component 2, and is used to measure the air pressure; the automatic controller is electrically connected to the pressure gauge, the air inlet valve of the nitrogen production component 3 and the air compression component 1, and is used to control the closing of the air inlet valve and increase the compression force of the air compression component 1 when the air pressure detected by the pressure gauge is lower than the predetermined air pressure.

[0036] The feedback regulation component consists of two parts: a pressure gauge and an automatic controller. The pressure gauge is installed on the outlet pipeline of the pretreatment component 2 to measure the pressure of the pretreated compressed air in real time. This measurement value is crucial to the system because it is directly related to the working efficiency of the nitrogen production component 3 and the quality of the final nitrogen product.

[0037] When the compressed air supply increases after passing through the pretreatment system and the output pressure to the nitrogen making component 3 is lower than 0.6MPa, the air intake of the nitrogen making component 3 is automatically closed through the pressure signal, and the compressed air use pressure of the compressed air instrument air system is increased to maintain stable operation of the equipment.

[0038] As an optional implementation, the air compression assembly 1 includes an air compressor 101 and a compressed air storage tank 102 .

[0039] The air compressor 101 is the main equipment of the air compression assembly 1, and its function is to suck in air under atmospheric pressure and compress it to the required pressure level. According to the needs of the system, the air compressor 101 can be a reciprocating, rotary screw, centrifugal or other type of compressor, and the type to be selected depends on factors such as the required pressure, flow rate and efficiency. The air compressor 101 is usually equipped with a motor drive, which automatically adjusts the speed according to the required compressed air volume and pressure to achieve energy-saving and efficient operation.

[0040] The compressed air storage tank 102 is used in conjunction with the air compressor 101 to store compressed air to balance the air flow and pressure fluctuations in the system. The air storage tank can reduce the frequent starting and stopping of the air compressor 101, thereby extending its service life and providing a stable supply of compressed air. The air storage tank also helps to reduce moisture and impurities that may be generated during the compression process, because these substances are more easily precipitated and separated in the air storage tank.

[0041] As an optional embodiment, the pretreatment component 2 includes a high-temperature combined dryer and a filter group.

[0042] The high temperature combined dryer is a key device in the pretreatment component 2, which is used to remove moisture from the compressed air. It usually operates at a higher temperature and can absorb and discharge moisture from the compressed air more efficiently. This dryer may use a variety of drying technologies, such as adsorption drying, membrane separation drying or freeze drying, to meet different drying efficiency and dew point requirements. The design of the high temperature combined dryer enables it to maintain a stable drying effect in continuous operation, and has the ability to self-regenerate, reducing maintenance requirements and operating costs.

[0043] The filter group is used to remove solid particles, oil mist and other impurities in the compressed air to protect the nitrogen production component 3 from contamination. The filter group may include a primary filter, a secondary filter and a high-efficiency filter, which are arranged in a certain order to ensure that the gas reaches the required cleanliness before entering the nitrogen production component 3. The filter can be replaced or cleaned as needed to maintain its filtering efficiency and ensure long-term stable operation of the system.

[0044] As an optional implementation, an instrumentation and control interlock is electrically connected to each component for controlling each component.

[0045] The instrument control interlock integrates control logic and interfaces, and can receive signals from various sensors in the system and control corresponding actuators such as valves, compressors and dryers according to these signals. Through the instrument control interlock, the system can realize automatic operation, reduce manual intervention, improve the convenience of operation and the response speed of the system. The instrument control interlock can monitor the key parameters in the system in real time, such as pressure, flow, temperature and humidity, and automatically adjust according to the preset control strategy to maintain the optimal operation state of the system. The instrument control interlock also has a safety protection function. When abnormal conditions are detected, such as overpressure, overtemperature and abnormal flow, measures such as closing valves or shutting down can be automatically taken to protect the safety of the system and operators. That is, the compressed air produced by the compressed air system can automatically control the air supply volume and air supply pressure of the compressed instrument air through the pressure signal. At the same time, according to the nitrogen flow of the downstream nitrogen production system, the main engine and the backup system of the nitrogen production system are automatically closed and opened to maintain the stability of the system gas production.

[0046] The above technical solution has the following beneficial effects: reducing human operating errors and improving system operation efficiency through automated control; enhancing system stability, automatically adjusting and responding to changes, and maintaining the continuity of nitrogen supply; the backup nitrogen production components and self-supporting regulating valves ensure seamless switching when the main system fails, ensuring continuous gas supply and improving system reliability; reducing maintenance costs, the system's automation and monitoring functions simplify maintenance work, reducing maintenance costs and downtime.

[0047] The specific implementation methods of the above invention further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above content is only the specific implementation methods of the present invention and is not intended to limit the protection scope of 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 low dew point intelligent air nitrogen system, characterized in that: include: An air compression component, the air compression component is used to provide compressed air; A pre-treatment component, the air inlet end of the pre-treatment component is connected to the air outlet end of the air compression component, and is used to purify and dry the compressed air; A nitrogen production component, the gas inlet end of the nitrogen production component is connected to the gas outlet end of the pretreatment component, and is used to produce nitrogen; A gas pipeline, the gas inlet end of the gas pipeline is connected to the gas outlet end of the nitrogen production assembly, and the gas outlet end is used to connect to the equipment to be supplied with gas; A delivery regulator is arranged on the gas delivery pipeline.

2. The low dew point intelligent air-nitrogen system according to claim 1 is characterized by: There are at least two nitrogen production components, one of which is a running nitrogen production component and the other is a standby nitrogen production component.

3. The low dew point intelligent air-nitrogen system according to claim 2 is characterized in that: A standby machine control module is electrically connected to the operating nitrogen production component and the standby nitrogen production component, and is used to start the standby nitrogen production component when the required flow rate is greater than a preset flow rate.

4. The low dew point intelligent air-nitrogen system according to claim 1 is characterized in that: Also includes: A self-supporting regulating valve is arranged on a detection pipeline in a gas transmission pipeline and is used for stabilizing pressure.

5. The low dew point intelligent air-nitrogen system according to claim 1 is characterized in that: Also includes: Feedback Regulation Components: The feedback adjustment component includes a pressure gauge and an automatic controller; The pressure gauge is arranged on the pipeline at the gas outlet end of the pretreatment component and is used to measure the gas pressure; The automatic controller is electrically connected to the pressure gauge, the air intake valve of the nitrogen production component and the air compression component, and is used to control the air intake valve to close and increase the compression force of the air compression component when the air pressure detected by the pressure gauge is lower than the predetermined air pressure.

6. The low dew point intelligent air-nitrogen system according to claim 1, characterized in that: The air compression assembly comprises an air compressor and a compressed air storage tank.

7. The low dew point intelligent air-nitrogen system according to claim 1, characterized in that: The pretreatment component includes a high-temperature combined dryer and a filter group.

8. The low dew point intelligent air-nitrogen system according to claim 1, characterized in that: Also includes: An instrumentation and control interlock is electrically connected to each component and is used to control each component.

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