Nitrogen making machine for oil field

Abstract

The utility model discloses a nitrogen making machine for an oil field, which relates to the technical field of nitrogen making machines and comprises a rack, a treatment cover is fixedly arranged at the top end of the rack, two cavities are arranged in the treatment cover, end covers are fixedly arranged at two ends of the treatment cover, and two positioning seats are fixedly arranged in the treatment cover. The treatment cover is arranged above the rack, the hollow fiber membrane is arranged in the treatment cover, the end covers are arranged at the two ends of the treatment cover, the two air guide pipes corresponding to the hollow fiber membrane are arranged on the outer sides of the end covers, and the communicating pipe is arranged between the two air guide pipes. The compressed air circulates between the two groups of hollow fiber membranes by closing the electromagnetic valve between the group of air guide pipes and the communicating pipe, and at the moment, the compressed air can realize the back-flushing treatment on the group of hollow fiber membranes so as to realize the back-flushing cleaning on the hollow fiber membranes, so that the self-cleaning of the equipment can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen generators, and particularly relates to a nitrogen generator for oil fields. Background Art

[0002] In the modern petroleum industry, with the rapid development of nitrogen technology, it has been widely applied to many links of oil and gas production. Especially in recent years, with the update and improvement of equipment manufacturing technology and the improvement of process technology, the market competitiveness of nitrogen technology has been greatly enhanced. Compared with conventional methods, using nitrogen to treat oil wells and oil layers has the characteristics of safety, time-saving, fast speed, high efficiency, and a high construction success rate. Based on the characteristics of low density, good stability, and easy compressibility of nitrogen, it has a wide range of applications in drilling, cementing, perforating, gas lift, and tertiary recovery.

[0003] A vehicle-mounted hollow fiber membrane nitrogen production device with the publication number of CN201031143Y, all equipment is fixed on the flat chassis of two box-type flatbed trucks. The air compressor is connected to the buffer tank, the buffer tank is connected to the air cooler, the air cooler is connected to the gas-water separator, the gas-water separator is connected to the high-efficiency oil remover, the high-efficiency oil remover is connected to the cold dryer, the cold dryer is connected to three series-connected filters, the filters are connected to two or four vertical-structured hollow fiber membrane nitrogen production towers, the nitrogen production towers are connected to the filters by quick-connect pressure hoses, the nitrogen buffer tank is connected by process pipelines, and the nitrogen tank outlet assembly connects the nitrogen buffer tank and the nitrogen high-pressure machine. This device has a reasonable design, simple structure, low price, the nitrogen production purity can be adjusted in the range of 95 - 99.99%, has a long service life, and can be used for oil field drilling, squeezing out oil, gas, and water, purging and transporting oil pipelines, encapsulating and extinguishing oil tanks and chemical storage tanks, and any place where a large amount of nitrogen is needed for a short time.

[0004] The above technical solution has some problems in practical applications. In the process of long-term use of this technical solution, it is difficult to automatically clean the hollow fiber membrane inside the nitrogen production tower, so it is difficult to ensure the long-term use of the equipment.

[0005] Therefore, it is very necessary to invent a nitrogen generator for oil fields to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a nitrogen generator for oil fields to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solution: A nitrogen generator for oil fields, comprising a frame, a processing cover is fixedly arranged at the top of the frame, and two cavities are arranged inside the processing cover. End caps are fixedly arranged at both ends of the processing cover. Two positioning seats are fixedly arranged inside the processing cover. A plurality of support rods are arranged around the outer side walls of the two positioning seats. The support rods on the outer sides of the two positioning seats are respectively fixedly arranged inside the two cavities. Positioning rings are fixedly arranged on one side of the positioning seat and one end cap close to each other. A hollow fiber membrane is fixedly arranged between the two positioning rings. Two air ducts penetrate through the outer side wall of the end cap, and a first solenoid valve is fixedly arranged at one end of the air duct. A connecting pipe is fixedly arranged between the two air ducts. An extension pipe is fixedly arranged at one end of the connecting pipe, and both ends of the extension pipe are fixedly connected to the middle parts of the two air ducts respectively.

[0008] Preferably, second solenoid valves are fixedly arranged at both ends of the extension pipe.

[0009] Preferably, a third solenoid valve is fixedly arranged at one end of the connecting pipe.

[0010] Preferably, an air compressor is fixedly arranged at the bottom end inside the frame, and an air inlet pipe is fixedly arranged at the output end of the air compressor.

[0011] Preferably, a filter is fixedly arranged at one end of the air inlet pipe, and a connecting pipe is fixedly arranged at the output end of the filter, and one end of the connecting pipe is fixedly connected to one of the connecting pipes.

[0012] Preferably, the end cap is fixedly connected to one end of the processing cover by bolts.

[0013] The technical effects and advantages of the present utility model:

[0014] 1. The present utility model sets a processing cover above the frame, and a hollow fiber membrane is arranged inside the processing cover. By setting end caps at both ends of the processing cover, two air ducts corresponding to the hollow fiber membrane are arranged on the outer side of the end cap, and a connecting pipe is arranged between the two air ducts. When the hollow fiber membrane is saturated after long-term use of the equipment, by closing the solenoid valve between a group of air ducts and the connecting pipe, the compressed air can complete circulation between the two groups of hollow fiber membranes. At this time, the compressed air can realize the backwashing treatment of a group of hollow fiber membranes, so as to realize the backwashing and cleaning of the hollow fiber membrane, and thus the self-cleaning of the equipment can be realized;

[0015] 2. The present utility model sets a frame, and an air compressor is arranged inside the frame. A filter is arranged at the output end of the air compressor through the air inlet pipe. The filter can filter the compressed air to avoid the influence of impurities in the air on the hollow fiber membrane, thereby ensuring the production quality of nitrogen. Description of the Drawings

[0016] Figure 1 This is a schematic diagram of the overall structure of the present utility model.

[0017] Figure 2 This is a schematic diagram of the processing cover structure of the present utility model.

[0018] Figure 3 This is a schematic cross-sectional view of the processing cover structure of the present utility model.

[0019] Figure 4 This is a schematic diagram of the gas trajectory during the backwashing process of the hollow fiber membrane of the present utility model.

[0020] In the figure: 1, frame; 2, processing cover; 3, end cover; 4, positioning seat; 5, support rod; 6, positioning ring; 7, hollow fiber membrane; 8, air duct; 9, first solenoid valve; 10, connecting pipe; 11, extension pipe; 12, second solenoid valve; 13, third solenoid valve; 14, air compressor; 15, intake pipe; 16, filter; 17, connecting pipe. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] The present utility model provides a nitrogen generator for oil fields as shown in Figures 1-4 Figure, which includes a frame 1. A processing cover 2 is fixedly arranged at the top of the frame 1. There are two cavities inside the processing cover 2. End covers 3 are fixedly arranged at both ends of the processing cover 2. Two positioning seats 4 are fixedly arranged inside the processing cover 2. A plurality of support rods 5 are arranged around the outer side walls of the two positioning seats 4. The support rods 5 on the outer sides of the two positioning seats 4 are respectively fixedly arranged inside the two cavities. Positioning rings 6 are fixedly arranged on the sides of the positioning seat 4 and one end cover 3 that are close to each other. A hollow fiber membrane 7 is fixedly arranged between the two positioning rings 6. The hollow fiber membrane 7 can adsorb oxygen and impurities in the air to realize the preparation of nitrogen;

[0023] Specifically, two air ducts 8 are penetrated through the outer side wall of the end cover 3, and a first solenoid valve 9 is fixedly arranged at one end of the air duct 8. A connecting pipe 10 is fixedly arranged between the two air ducts 8. An extension pipe 11 is fixedly arranged at one end of the connecting pipe 10, and both ends of the extension pipe 11 are fixedly connected to the middle parts of the two air ducts 8 respectively. Second solenoid valves 12 are fixedly arranged at both ends of the extension pipe 11. A third solenoid valve 13 is fixedly arranged at one end of the connecting pipe 10. The second solenoid valves 12 can control the inflow and outflow of gas in different cavities, and the third solenoid valve 13 can control the input and output of gas.

[0024] More specifically, an air compressor 14 is fixedly arranged at the inner bottom end of the frame 1, and an air inlet pipe 15 is fixedly arranged at the output end of the air compressor 14. A filter 16 is fixedly arranged at one end of the air inlet pipe 15, and a connecting pipe 17 is fixedly arranged at the output end of the filter 16. One end of the connecting pipe 17 is fixedly connected to a connecting pipe 10. The filter 16 can filter the compressed air.

[0025] Moreover, the end cover 3 is fixedly connected to one end of the treatment cover 2 by bolts. By disassembling the end cover 3, the cleaning and maintenance of the hollow fiber membrane 7 can be realized.

[0026] Working principle of the utility model:

[0027] When the device is in use, the connecting pipe 10, the extension pipe 11, and the air ducts 8 form the air inlet and exhaust pipelines of the treatment cover 2. When preparing nitrogen, the first solenoid valves 9 at one ends of the multiple air ducts 8 are all in the closed state, and the multiple second solenoid valves 12 and the third solenoid valve 13 are all in the open state. At this time, the compressed air generated by the air compressor 14 enters the connecting pipe 10 after being filtered by the filter 16, enters the two air ducts 8 through the extension pipe 11 at one end of the connecting pipe 10, and then enters the hollow fiber membranes 7 in the two treatment covers 2 through the air ducts 8. The compressed air passes through the hollow fiber membranes 7, so that oxygen and impurities in the air are adsorbed. The remaining nitrogen passes through the hollow fiber membranes 7 and then is discharged through another group of air ducts 8 and the connecting pipe 10. Thus, the preparation of nitrogen can be realized.

[0028] When the hollow fiber membrane 7 becomes saturated, the third solenoid valve 13 at one end of the connecting pipe 10 at the exhaust end of the treatment cover 2 is closed, the second solenoid valve 12 at one end of the extension pipe 11 at the air inlet end of the treatment cover 2 is closed, and the first solenoid valve 9 at the end of the air duct 8 corresponding to the other end of the extension pipe 11 is opened, so that the connecting pipe 10, the extension pipe 11, and the two cavities form a loop pipeline. At this time, the compressed air enters the cavity through the connecting pipe 10 and the extension pipe 11, and passes through the hollow fiber membrane 7 from the outside to the inside in one cavity to realize the backwashing treatment of the hollow fiber membrane. The waste gas generated by the backwashing is directly discharged through the air duct 8 to achieve the effect of self-cleaning.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A nitrogen generator for oil fields, comprising a frame (1), characterized in that: A processing cover (2) is fixedly arranged at the top of the frame (1), and two cavities are arranged inside the processing cover (2), and end covers (3) are fixedly arranged at both ends of the processing cover (2), and two positioning seats (4) are fixedly arranged inside the processing cover (2), and the outer side walls of the two positioning seats (4) are surrounded by a plurality of support rods (5), and the support rods (5) outside the two positioning seats (4) are respectively fixedly arranged inside the two cavities, and the positioning seat (4) and one end cover (3) are close to each other. A positioning ring (6) is fixedly provided on one side of each of the two positioning rings (6), a hollow fiber membrane (7) is fixedly provided between the two positioning rings (6), two air guide tubes (8) are penetrated through the outer wall of the end cover (3), and a first solenoid valve (9) is fixedly provided at one end of the air guide tube (8), a connecting tube (10) is fixedly provided between the two air guide tubes (8), an extension tube (11) is fixedly provided at one end of the connecting tube (10), and the two ends of the extension tube (11) are respectively fixedly connected to the middle parts of the two air guide tubes (8).

2. The oilfield nitrogen generator according to claim 1, characterized in that: Second solenoid valves (12) are fixedly arranged at both ends of the extension tube (11).

3. The oilfield nitrogen generator according to claim 2, characterized in that: A third solenoid valve (13) is fixedly disposed at one end of the connecting pipe (10).

4. The oilfield nitrogen generator according to claim 3, characterized in that: An air compressor (14) is fixedly arranged at the inner bottom end of the frame (1), and an air intake pipe (15) is fixedly arranged at the output end of the air compressor (14).

5. The oilfield nitrogen generator according to claim 4, characterized in that: A filter (16) is fixedly provided at one end of the air inlet pipe (15), and a connecting pipe (17) is fixedly provided at the output end of the filter (16), and one end of the connecting pipe (17) is fixedly connected to a connecting pipe (10).

6. The oilfield nitrogen generator according to claim 5, characterized in that: The end cover (3) is fixedly connected to one end of the processing cover (2) via bolts.

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