CN214306485U - Nitrogen injection device - Google Patents
Nitrogen injection device Download PDFInfo
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- CN214306485U CN214306485U CN202022715473.3U CN202022715473U CN214306485U CN 214306485 U CN214306485 U CN 214306485U CN 202022715473 U CN202022715473 U CN 202022715473U CN 214306485 U CN214306485 U CN 214306485U
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Abstract
The utility model discloses a annotate nitrogen device belongs to nitrogen and hinders to dissolve and make chamber technical field. Annotate nitrogen gas device includes: the liquid nitrogen storage tank and the skid-mounted assembly, the skid-mounted assembly comprises a skid seat, and a low-temperature pump unit, a liquid nitrogen vaporizer, a control cabinet and a power distribution cabinet which are arranged on the skid seat. The outlet of the liquid nitrogen storage tank is connected with the inlet of the low-temperature pump group through a first pipeline. The outlet of the low-temperature pump group is connected with the inlet of the liquid nitrogen vaporizer through a second pipeline, and the second pipeline is provided with a closing valve. The outlet of the low-temperature pump group is also connected with the inlet of the liquid nitrogen storage tank through a third pipeline, and a return valve is arranged on the third pipeline. And the outlet of the liquid nitrogen vaporizer outputs nitrogen through a fourth pipeline, and the fourth pipeline is provided with a pressure regulating valve. The control cabinet is respectively and electrically connected with the isolating valve, the reflux valve and the pressure regulating valve. The power distribution cabinet is electrically connected with the plurality of cryogenic pumps and the liquid nitrogen vaporizer respectively.
Description
Technical Field
The utility model relates to a nitrogen hinders and dissolves and makes chamber technical field, in particular to annotate nitrogen device.
Background
The salt cavern gas storage is mainly built by a water-soluble cavity building method, a salt layer is dissolved by injecting water into the salt layer, and a dissolution inhibitor is injected in the cavity building process to control the shape of a cavity.
At present, diesel oil is generally used as a dissolution inhibitor, but the diesel oil has higher cost and great difficulty in subsequent oil-water separation. Thus, a proposal has been made to use nitrogen as the dissolution inhibitor.
Because the temperature difference between the liquid nitrogen and the environment is about 200 ℃, the liquid nitrogen is not easy to store and transmit, thereby providing a safe and reliable nitrogen injection device which is the key of the nitrogen dissolution-resistant cavity-making technology.
SUMMERY OF THE UTILITY MODEL
The utility model provides a nitrogen injection device. The technical scheme is as follows:
provided is a nitrogen gas injection device, including: the liquid nitrogen purification device comprises a liquid nitrogen storage tank and a skid-mounted assembly, wherein the skid-mounted assembly comprises a skid seat, and a low-temperature pump unit, a liquid nitrogen vaporizer, a control cabinet and a power distribution cabinet which are arranged on the skid seat, and the low-temperature pump unit comprises a plurality of low-temperature pumps which are connected in parallel;
an outlet of the liquid nitrogen storage tank is connected with an inlet of the low-temperature pump group through a first pipeline;
the outlet of the low-temperature pump group is connected with the inlet of the liquid nitrogen vaporizer through a second pipeline, and the second pipeline is provided with a closing valve;
the outlet of the low-temperature pump group is also connected with the inlet of the liquid nitrogen storage tank through a third pipeline, and a return valve is arranged on the third pipeline;
the outlet of the liquid nitrogen vaporizer outputs nitrogen through a fourth pipeline, and a pressure regulating valve is arranged on the fourth pipeline;
the control cabinet is respectively and electrically connected with the isolating valve, the reflux valve and the pressure regulating valve;
the power distribution cabinet is electrically connected with the plurality of cryogenic pumps and the liquid nitrogen vaporizer respectively.
Optionally, the second pipeline and/or the fourth pipeline are/is further provided with an emptying valve, and the emptying valve is used for discharging nitrogen in the pipeline.
Optionally, the skid-mounted assembly further comprises a vent silencer arranged on the skid base, and the vent silencer is connected with an outlet of the vent valve.
Optionally, a flow meter is further provided on the fourth pipe, the flow meter being located between the pressure regulating valve and the liquid nitrogen vaporizer.
Optionally, a pressure gauge is further connected to the fourth pipeline, and the pressure gauge is used for measuring the pressure at the outlet of the pressure regulating valve.
Optionally, a check valve is further disposed on the fourth pipeline, and the check valve is located at an outlet side of the pressure regulating valve.
Optionally, a check valve is further disposed on the second conduit, and the check valve is located between the cryopump and the block valve.
Optionally, the outlet of the liquid nitrogen storage tank is flanged with the inlet of the cryopump volume through a first pipe.
Optionally, the skid assembly further comprises one or more oxygen content detectors disposed on the skid.
Optionally, the skid-mounted assembly further comprises an exhaust fan, and the exhaust fan is electrically connected with the oxygen content detector.
The utility model provides a beneficial effect that technical scheme brought includes:
the utility model provides a nitrogen injection device adopting modular design, which provides powerful guarantee for the safe and stable operation of nitrogen gas conveying technology through the mutual cooperation of a liquid nitrogen storage tank, a cryogenic pump, a liquid nitrogen vaporizer and a plurality of valves; the prying body is formed by the components such as the cryogenic pump, the liquid nitrogen vaporizer and the like, so that the space is saved, the site construction and installation are facilitated, the carrying and the recycling are easy, and the construction efficiency can be improved. Through set up the flowmeter at nitrogen gas exit, can satisfy the measurement of single well chamber building in-process to nitrogen gas injection volume, be convenient for to the analysis of annotating nitrogen gas data. Through the linkage of the exhaust fan and the oxygen content detector, the safety of inspection personnel can be ensured in a closed environment.
Drawings
Fig. 1 is a schematic structural diagram of a nitrogen gas injection device according to an embodiment of the present invention;
fig. 2 is a schematic top view of a nitrogen gas injection device according to an embodiment of the present invention;
fig. 3 is a schematic side view of a nitrogen injection device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a 45 ° view of a nitrogen injection device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a nitrogen gas injection device according to an embodiment of the present invention. As shown in fig. 1, the nitrogen gas injection apparatus includes: a liquid nitrogen storage tank 10 and a skid assembly 20. Skid-mounted assembly 20 includes skid base 201 and cryogenic pump set 202, liquid nitrogen vaporizer 203, control cabinet 204 and switch board 205 disposed on skid base 201. The cryopump volume 202 includes a plurality of cryopumps 202A-202B connected in parallel. The embodiment of the utility model provides an use cryogenic pump package to explain including two parallel cryogenic pumps as the example, cryogenic pump package can also include parallelly connected three or more cryogenic pump among the practical application. Of course, the cryopump group may include only one cryopump, and the embodiment of the present invention is not limited thereto.
The outlet of the liquid nitrogen storage tank 10 is connected to the inlet of the cryopump volume 202 through a first pipe L1. Referring to fig. 1, the first conduit L1 branches into two branches: branch d1 and branch d2, branch d1 is connected to the inlet of cryopump 202A, and branch d2 is connected to the inlet of cryopump 202B.
The liquid nitrogen storage tank stores liquid nitrogen in a low-temperature mode, and the storage pressure is low, so that the liquid nitrogen is kept at about-196 ℃. Optionally, the liquid nitrogen storage tank adopts a vacuum heat insulation mode for heat insulation, so that the loss of cold energy in the storage process of the liquid nitrogen can be reduced. A large amount of nitrogen can be provided after liquid nitrogen in the liquid nitrogen storage tank is gasified, and the demand of the single well for the nitrogen in the cavity building process is met.
The outlet of the cryopump group 202 is connected to the inlet of the liquid nitrogen vaporizer 203 through the second pipe L2. A block valve M1 is provided in the second line L2. Referring to fig. 1, the branch d1 and the branch d2 merge into a second pipe L2 after passing through the outlet of the cryopump 202A and the outlet of the cryopump 202B, respectively, and the second pipe L2 is connected to the inlet of the liquid nitrogen vaporizer 203.
Each cryogenic pump in the cryogenic pump set is used for boosting the pressure of the liquid nitrogen output by the liquid nitrogen storage tank. The isolating valve is used for cutting off the liquid nitrogen transmission channel after the low-temperature pump group boosts the liquid nitrogen to a certain pressure value, so that nitrogen overpressure generated by gasification of the liquid nitrogen vaporizer is prevented, and construction safety is guaranteed.
The outlet of the cryopump group 202 is also connected to the inlet of the liquid nitrogen storage tank 10 through a third pipe L3. A return valve M2 is provided in the third line L3. Referring to fig. 1, branch d1 and branch d2, after passing through the outlet of cryopump 202A and the outlet of cryopump 202B, respectively, also merge into a third conduit L3, and the third conduit L3 is connected to the inlet of liquid nitrogen storage tank 10.
By establishing a backflow channel between the outlet of the low-temperature pump unit and the inlet of the liquid nitrogen storage tank, liquid nitrogen which is output by the low-temperature pump unit and cannot be gasified by the liquid nitrogen vaporizer can be recovered, and the control of the amount of liquid nitrogen output by the low-temperature pump unit can also be realized.
Optionally, the first pipeline, the second pipeline and the third pipeline are insulated in a vacuum heat insulation mode, and the pipe is made of low-temperature-resistant stainless steel, so that loss of cold energy of liquid nitrogen in the transmission process can be reduced.
The outlet of the liquid nitrogen gas vaporizer 203 outputs nitrogen gas through a fourth pipe L4. The fourth line L4 is provided with a pressure regulating valve M3.
Optionally, the liquid nitrogen vaporizer is a vaporization heater. The liquid nitrogen vaporizer can heat nitrogen while gasifying liquid nitrogen, and further meets the requirement of single-well cavity building on the temperature change of the nitrogen. The pressure regulating valve is used for regulating the pressure of nitrogen at the nitrogen outlet, and meets the requirement of the single well on the change of the pressure of the nitrogen in the cavity building process. The liquid nitrogen vaporizer can be operated manually or automatically.
The control cabinet 204 is electrically connected to the block valve M1, the return valve M2, and the pressure regulating valve M3, respectively. The control cabinet is used for controlling the opening and closing of the valve and/or adjusting the flow of the valve and the like.
The distribution cabinet 205 is electrically connected to the plurality of cryopumps 202A to 202B and the liquid nitrogen vaporizer 203, respectively. The switch board is used for supplying power for the connected components.
Optionally, the various components of the nitrogen injection device are connected by flanges through pipes. For example, the outlet of the liquid nitrogen storage tank 10 is flanged with the inlet of the cryopump volume 202 through a first pipe L1; the outlet of the cryopump group 202 is connected with the inlet flange of the liquid nitrogen vaporizer 203 through a second pipeline L2; the outlet of the cryopump volume 202 is flanged to the inlet of the liquid nitrogen storage tank 10 via a third conduit L3. The various components of the skid assembly 20 may be bolted to the skid base.
The embodiment of the utility model provides a annotate nitrogen device's working process as follows: pressurizing low-temperature liquid nitrogen (-about 196 ℃) in a liquid nitrogen storage tank by a low-temperature pump, and then entering a liquid nitrogen vaporizer for heating and vaporizing to obtain nitrogen (about 10 ℃); and the nitrogen is subjected to pressure stabilization by the pressure regulating valve and then is injected into the underground salt cavity as a dissolution inhibitor so as to realize the dissolution inhibition of the manufactured cavity.
In summary, the nitrogen injection device provided by the embodiment of the utility model adopts the modular design, and through the mutual cooperation of the liquid nitrogen storage tank, the cryogenic pump, the liquid nitrogen vaporizer and the valves, the nitrogen delivery technology is effectively guaranteed to run safely and stably; the prying body is formed by the components such as the cryogenic pump, the liquid nitrogen vaporizer and the like, so that the space is saved, the site construction and installation are facilitated, the carrying and the recycling are easy, and the construction efficiency can be improved.
Optionally, with continued reference to fig. 1, a venting valve M4 is further disposed on the second conduit L2 and/or the fourth conduit L4. A vent valve M4 is used to vent the nitrogen in the line.
The air release valve can discharge redundant nitrogen in the pipeline, so that the pressure in the pipeline is kept in a stable working condition, and the construction safety is ensured.
Optionally, with continued reference to FIG. 1, the skid assembly 20 further includes an emptying silencer 206 disposed on the skid base 201. The vent muffler 206 is connected to the outlet of the vent valve M4.
Through set up the unloading muffler in sled dress subassembly, can reduce the noise in the unloading valve working process.
Optionally, with continued reference to fig. 1, a flow meter N is further disposed on the fourth pipeline L4. The flow meter N is located between the pressure regulating valve M3 and the liquid nitrogen gas vaporizer 203.
The flowmeter can meet the measurement of nitrogen injection amount in the single-well cavity building process, and is convenient for analyzing nitrogen injection data.
Optionally, with continued reference to fig. 1, a pressure gauge PT is connected to the fourth pipe L4. The pressure gauge PT is used to measure the pressure at the outlet of the pressure regulating valve M3. The pressure regulating valve regulates pressure based on the pressure measured by the pressure gauge.
Optionally, with continued reference to fig. 1, a check valve M5 is further disposed on the fourth conduit L4. The check valve M5 is located on the outlet side of the pressure regulating valve M3. The check valve can prevent nitrogen at the outlet from flowing back to the liquid nitrogen carburetor, and plays a role in protecting the liquid nitrogen carburetor.
Optionally, with continued reference to fig. 1, a check valve M5 is disposed on each of the branch d1 and the branch d 2. Alternatively, the second and third conduits L2 and L3 may be provided with check valves (not shown), the check valve on the second conduit L2 being located between the cryopump 202 and the block valve M1. The check valve can prevent the backflow of liquid nitrogen at the outlet of the cryopump, and plays a role in protecting the cryopump.
In order to facilitate the reader to better understand the structure of the nitrogen injection device provided by the embodiment of the present invention, the embodiment of the present invention further provides a schematic structural diagram of a top view, a schematic structural diagram of a side view and a schematic structural diagram of a 45 ° view of the nitrogen injection device, which are respectively shown in fig. 2, fig. 3 and fig. 4. For the explanation of the reference numbers in the drawings, reference may be made to the explanation of the reference numbers in fig. 1, and the embodiments of the present invention are not described herein again.
Optionally, skid assembly 20 further includes one or more oxygen content detectors (not shown) disposed on skid base 201.
Optionally, referring to fig. 2, 3 and 4, the skid assembly 20 further includes an exhaust fan 207. The exhaust fan 207 is electrically connected to the oxygen content detector.
When the oxygen content detected by the oxygen content detector is lower than a certain value, the exhaust fan is started, and the safety of inspection personnel can be ensured in a closed environment through linkage of the exhaust fan and the oxygen content detector.
In summary, the nitrogen injection device provided by the embodiment of the utility model adopts the modular design, and through the mutual cooperation of the liquid nitrogen storage tank, the cryogenic pump, the liquid nitrogen vaporizer and the valves, the nitrogen delivery technology is effectively guaranteed to run safely and stably; the prying body is formed by the components such as the cryogenic pump, the liquid nitrogen vaporizer and the like, so that the space is saved, the site construction and installation are facilitated, the carrying and the recycling are easy, and the construction efficiency can be improved. Through set up the flowmeter at nitrogen gas exit, can satisfy the measurement of single well chamber building in-process to nitrogen gas injection volume, be convenient for to the analysis of annotating nitrogen gas data. Through the linkage of the exhaust fan and the oxygen content detector, the safety of inspection personnel can be ensured in a closed environment.
In the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The term "and/or" in the embodiment of the present invention is only an association relationship describing an associated object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The above description is only an optional embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A nitrogen gas injection device, comprising: the liquid nitrogen purification device comprises a liquid nitrogen storage tank and a skid-mounted assembly, wherein the skid-mounted assembly comprises a skid seat, and a low-temperature pump unit, a liquid nitrogen vaporizer, a control cabinet and a power distribution cabinet which are arranged on the skid seat, and the low-temperature pump unit comprises a plurality of low-temperature pumps which are connected in parallel;
an outlet of the liquid nitrogen storage tank is connected with an inlet of the low-temperature pump group through a first pipeline;
the outlet of the low-temperature pump group is connected with the inlet of the liquid nitrogen vaporizer through a second pipeline, and the second pipeline is provided with a closing valve;
the outlet of the low-temperature pump group is also connected with the inlet of the liquid nitrogen storage tank through a third pipeline, and a return valve is arranged on the third pipeline;
the outlet of the liquid nitrogen vaporizer outputs nitrogen through a fourth pipeline, and a pressure regulating valve is arranged on the fourth pipeline;
the control cabinet is respectively and electrically connected with the isolating valve, the reflux valve and the pressure regulating valve;
the power distribution cabinet is electrically connected with the plurality of cryogenic pumps and the liquid nitrogen vaporizer respectively.
2. The nitrogen gas injection device according to claim 1, wherein a vent valve is further provided on the second pipeline and/or the fourth pipeline, and the vent valve is used for discharging nitrogen gas in the pipeline.
3. The nitrogen injection apparatus of claim 2, wherein the skid assembly further comprises a vent silencer disposed on the skid base, the vent silencer being connected to an outlet of the vent valve.
4. The nitrogen injection apparatus according to claim 1, wherein a flow meter is further provided on the fourth pipe, the flow meter being located between the pressure regulating valve and the liquid nitrogen vaporizer.
5. The nitrogen injection device according to claim 1, wherein a pressure gauge is further connected to the fourth pipeline, and the pressure gauge is used for measuring the pressure at the outlet of the pressure regulating valve.
6. The nitrogen injection device according to claim 1, wherein a check valve is further provided on the fourth pipe, the check valve being located at an outlet side of the pressure regulating valve.
7. The nitrogen injection apparatus of claim 1, wherein a check valve is further disposed on the second conduit, the check valve being located between the cryopump and the block valve.
8. The nitrogen gas injection apparatus according to any one of claims 1 to 7, wherein an outlet of the liquid nitrogen storage tank is flanged with an inlet of the cryopump volume through a first pipe.
9. The nitrogen injection apparatus of any one of claims 1 to 7, wherein the skid assembly further comprises one or more oxygen content detectors disposed on the skid.
10. The nitrogen injection apparatus of claim 9, wherein the skid-mounted assembly further comprises an exhaust fan, the exhaust fan being electrically connected to the oxygen content detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022715473.3U CN214306485U (en) | 2020-11-20 | 2020-11-20 | Nitrogen injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022715473.3U CN214306485U (en) | 2020-11-20 | 2020-11-20 | Nitrogen injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214306485U true CN214306485U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022715473.3U Active CN214306485U (en) | 2020-11-20 | 2020-11-20 | Nitrogen injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214306485U (en) |
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2020
- 2020-11-20 CN CN202022715473.3U patent/CN214306485U/en active Active
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