CN214890523U - Liquid nitrogen equipment - Google Patents
Liquid nitrogen equipment Download PDFInfo
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- CN214890523U CN214890523U CN202023276932.9U CN202023276932U CN214890523U CN 214890523 U CN214890523 U CN 214890523U CN 202023276932 U CN202023276932 U CN 202023276932U CN 214890523 U CN214890523 U CN 214890523U
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Abstract
The utility model discloses a liquid nitrogen equipment, include: the system comprises a nitrogen storage tank, an air temperature type heat exchange system, a liquid path system, a detector and a controller; the nitrogen storage tank is simultaneously communicated with the air temperature type heat exchange system and the liquid path system; the detector is configured to detect the liquid nitrogen flow of the liquid nitrogen flowing out of the nitrogen storage tank and feed the liquid nitrogen flow back to the controller; the controller is used for controlling the connection state between the nitrogen storage tank and the air temperature type heat exchange system and between the nitrogen storage tank and the liquid path system to be in one of the following two states according to the feedback of the detector: in the first state, the nitrogen storage tank is simultaneously communicated with the air temperature type heat exchange system and the liquid path system; and in the second state, the nitrogen storage tank is only communicated with the air temperature type heat exchange system. Therefore, the air temperature type heat exchange system can be used for providing part of heat in the whole working process of the liquid nitrogen equipment, so that the energy consumption of the liquid nitrogen equipment is greatly saved on the premise of ensuring that both large displacement and small displacement can be met, and the running cost is reduced.
Description
Technical Field
The utility model relates to a liquid nitrogen technical field especially relates to a liquid nitrogen equipment.
Background
The principle of the liquid nitrogen equipment is that liquid nitrogen is converted from low-temperature low-pressure liquid into normal-temperature high-pressure gas in a pressurizing and heating mode, and the liquid nitrogen equipment is used for oil field production increasing operations such as injection fracturing, gas lift liquid drainage, oil displacement and the like and is widely applied to the field of oil fields.
The liquid nitrogen equipment in the market at present mainly comprises two types, one type is liquid nitrogen equipment driven by a diesel engine, the structure of the liquid nitrogen equipment mainly comprises a power system, a hydraulic system, a pumping system, an evaporation system, a pipeline system, a control system and the like, a liquid nitrogen pump is driven by the diesel engine, the heat source for evaporating and vaporizing the liquid nitrogen is fuel oil, the liquid nitrogen is evaporated and vaporized by the heat generated by the direct combustion of the fuel oil or the heat provided for the power system by the combustion of the fuel oil, the second type is liquid nitrogen equipment driven by a motor, the main structure of the liquid nitrogen equipment comprises a motor system, a pumping system, an evaporation system, a pipeline system, a control system and the like, the liquid nitrogen pump is driven by the motor, and the heat generated by the evaporation and vaporization of the liquid nitrogen is generated by an electric heater. No matter the liquid nitrogen equipment is driven by a diesel engine or a motor, the energy consumption is high, and the economy is not enough.
For the reasons, in recent years, an air-temperature type heat evaporation system and a heat evaporation system based on a heat pump are proposed, the air-temperature type heat evaporation system evaporates vaporized liquid nitrogen by directly exchanging heat with the liquid nitrogen through finned tubes, but because the air-temperature type evaporation system evaporates the liquid nitrogen through heat in the air, the air contains limited heat, and the vaporized liquid nitrogen in unit time is small in volume, so that the displacement of equipment is insufficient. The heat pump system absorbs low-temperature heat in air through a working medium, so that the heat is transferred from the low-temperature medium to a high-temperature medium, power in a circulation process is from a compressor, the compressor is driven by a motor, and vaporized liquid nitrogen is evaporated through the heat generated by a heat pump unit.
Therefore, there is a need for a liquid nitrogen plant that is relatively energy efficient and economical at both large and small displacement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a liquid nitrogen equipment to solve among the prior art liquid nitrogen equipment energy consumption than higher, the not enough technical problem of economic nature.
In order to solve the above problem, the utility model adopts the following technical scheme:
according to an embodiment of the present application, there is provided a liquid nitrogen apparatus, including: the system comprises a nitrogen storage tank, an air temperature type heat exchange system, a liquid path system, a detector and a controller; the nitrogen storage tank is communicated with the air temperature type heat exchange system and the liquid path system simultaneously; the detector is configured to detect the liquid nitrogen flow of the liquid nitrogen flowing out of the nitrogen storage tank and feed back to the controller; the controller is used for controlling the connection state between the nitrogen storage tank and the air temperature type heat exchange system and between the nitrogen storage tank and the liquid path system to be in one of the following two states according to the feedback of the detector: in the first state, the nitrogen storage tank is simultaneously communicated with the air temperature type heat exchange system and the liquid path system; and in the second state, the nitrogen storage tank is only communicated with the air temperature type heat exchange system.
Optionally, the nitrogen storage tank and the air-temperature heat exchange system are always in a communication state, and the controller includes a first valve, and the first valve is arranged between the nitrogen storage tank and the liquid path system; the first valve controls the on-off state of the nitrogen storage tank and the liquid path system.
Optionally, the controller includes a first valve and a second valve, the first valve is disposed between the nitrogen storage tank and the liquid path system, the second valve is disposed between the nitrogen storage tank and the air-temperature heat exchange system, the first valve controls the on-off state of the nitrogen storage tank and the liquid path system, and the second valve controls the on-off state of the nitrogen storage tank and the air-temperature heat exchange system.
Optionally, the detector and controller are integrated into a control system.
Optionally, the detector is a flow sensor or a flow meter.
Optionally, the liquid nitrogen equipment further comprises a pressure pump configured to pressurize the liquid nitrogen flowing out of the nitrogen storage tank, and the nitrogen storage tank is simultaneously communicated with the liquid path system and the air-temperature heat exchange system through the pressure pump.
Optionally, the liquid nitrogen plant further comprises a heat pump system; the heat pump system includes a heat pump for generating heat and providing the heat to the fluid path system.
Optionally, the liquid path system comprises a liquid nitrogen heat absorption pipeline and a first heat exchange medium heat release pipeline, heat exchange can be performed between the liquid nitrogen heat absorption pipeline and the first heat exchange medium heat release pipeline, the heat pump system further comprises a first heat exchange medium heat absorption pipeline and a second heat exchange medium heat release pipeline, heat exchange can be performed between the first heat exchange medium heat absorption pipeline and the second heat exchange medium heat release pipeline, and the heat pump comprises a second heat exchange medium heat absorption pipeline; the first heat exchange medium heat release pipeline is communicated with the first heat exchange medium heat absorption pipeline end to form a circulation loop, and the second heat exchange medium heat release pipeline is communicated with the second heat exchange medium heat absorption pipeline end to form a circulation loop.
Optionally, the liquid nitrogen apparatus further comprises a skid system, and the nitrogen storage tank, the air-temperature heat exchange system, the liquid path system, the pressure pump and the heat pump system are all fixedly arranged on the skid system.
Optionally, the liquid nitrogen equipment still includes the nitrogen gas blast pipe, air temperature formula heat transfer system includes first nitrogen gas export, the liquid way system includes the second nitrogen gas export, first nitrogen gas export with the second nitrogen gas export simultaneously with the nitrogen gas blast pipe is linked together.
The utility model discloses a technical scheme can reach following beneficial effect:
the utility model provides a liquid nitrogen equipment can only use air temperature formula heat transfer system to evaporate the vaporization to the liquid nitrogen when little discharge capacity operating mode, uses temperature formula heat transfer system and liquid way system to evaporate the vaporization to the liquid nitrogen simultaneously when big discharge capacity operating mode. Therefore, the air temperature type heat exchange system can be used for providing part of heat in the whole working process of the liquid nitrogen equipment, so that the energy consumption of the liquid nitrogen equipment is greatly saved on the premise of ensuring that both large displacement and small displacement can be met, and the running cost is reduced.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a schematic diagram of the structure of a liquid nitrogen apparatus according to the present invention;
fig. 2 is a pipeline connection diagram of the liquid nitrogen equipment according to the utility model.
Description of reference numerals:
1 liquid path system
11 liquid nitrogen heat absorption pipeline
12 first heat exchange medium heat release pipeline
13 second nitrogen outlet
2 Heat pump system
21 heat pump
22 first heat exchange medium heat absorption pipeline
23 second heat exchange medium heat release pipeline
211 second heat exchange medium heat absorption pipeline
3 pressure pump
4 control system
41 first valve
42 second valve
43 Detector
6 air temperature type heat exchange system
61 first nitrogen outlet
7 skid system
8 nitrogen gas exhaust pipe
9 nitrogen storage tank
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, in one embodiment of the present application, there is provided a liquid nitrogen apparatus including: in addition to the nitrogen storage tank 9, the air temperature type heat exchange system 6, the liquid path system 1, the detector 43 and the controller, in this embodiment, a power supply device for supplying power to the whole system may be further included, in a more intelligent system, an intelligent control device installed with program control software for remotely controlling the detector 43 and the controller may be further included, wherein the detector 43, the intelligent control device of the controller and the power supply device may be integrated into the control system 4, wherein the intelligent control device is in communication connection with the detector 43 and the controller, and the power supply device is used for supplying power to each system and device in the liquid nitrogen equipment; the nitrogen storage tank 9 is communicated with the air temperature type heat exchange system 6 and the liquid path system 1 at the same time; the detector 43 is configured to detect the liquid nitrogen flow rate of the liquid nitrogen flowing out of the nitrogen storage tank 9 and feed back to the controller; the controller is used for controlling the connection state between the nitrogen storage tank and the air temperature type heat exchange system 6 and the liquid path system 1 to be in one of the following two states according to the feedback of the detector 43: in the first state, the nitrogen storage tank 9 is simultaneously communicated with the air temperature type heat exchange system 6 and the liquid path system 1; and in the second state, the nitrogen storage tank 9 is only communicated with the air temperature type heat exchange system 6.
Specifically, the detector 43 detects the liquid nitrogen flow rate of the liquid nitrogen flowing out from the nitrogen storage tank 9, for example, detects the liquid nitrogen flow rate value of the liquid nitrogen, and feeds the liquid nitrogen flow rate value back to the controller, when the fed back liquid nitrogen flow rate value is above a set value, that is, corresponding to a large discharge capacity working condition, the controller controls the nitrogen storage tank 9 to be in a communication state with the air temperature type heat exchange system 6 and the liquid path system 1 at the same time, so that the liquid nitrogen in the external nitrogen storage tank 9 enters the air temperature type heat exchange system 6 and the liquid path system 1 through the pipeline, the liquid nitrogen entering the air temperature type heat exchange system 6 exchanges heat with the external air and then is converted into the nitrogen, and the liquid nitrogen entering the liquid path system 1 acquires energy through heat exchange in the liquid path system 1 and then is converted into the nitrogen. When the liquid nitrogen flow value that feeds back is less than the setting value, promptly, corresponding to in the little discharge capacity operating mode, controller control nitrogen storage tank 9 only is in the connected state with air temperature formula heat exchange system 6, and the liquid nitrogen in outside nitrogen storage tank 9 only flows into air temperature formula heat exchange system 6 in, and the liquid nitrogen is converted into nitrogen gas after exchanging the heat with the outside air, then nitrogen gas discharge, for example, is used for oil field production increasing operation.
In some embodiments of the present application, the nitrogen storage tank 9 and the air-temperature heat exchange system 6 may be always in a communication state, the controller includes a first valve 41, and the first valve 41 may be disposed between the nitrogen storage tank and the liquid path system 1; the first valve 41 can be used to control the on-off state of the nitrogen storage tank 9 and the liquid path system 1. By arranging the first valve 41, the first valve 41 can be opened under the working condition of large discharge, so that the nitrogen storage tank 9 and the liquid path system 1 are in a communicated state; and in the working condition of small displacement, the first valve 41 is closed, so that the nitrogen storage tank 9 and the liquid path system 1 are in a disconnected state.
In other embodiments of the present application, the controller may also include a first valve 41 and a second valve 42 at the same time, the first valve 41 is disposed between the nitrogen storage tank 9 and the liquid path system 1, the second valve 42 is disposed between the nitrogen storage tank 9 and the air-temperature heat exchange system 6, the first valve 41 controls the on-off state of the nitrogen storage tank 9 and the liquid path system 1, and the second valve 42 controls the on-off state of the nitrogen storage tank 9 and the air-temperature heat exchange system 6. In this way, the opening and closing of the first valve 41 and the second valve 42 can be flexibly controlled according to the working condition, for example, the first valve 41 and the second valve 42 are simultaneously opened in the large displacement working condition, and only the second valve 42 is opened in the small displacement working condition. Both the first valve 41 and the second valve 42 may be electrically operated valves.
Wherein the detector 43 and the controller are integrated into a control system.
In the embodiment of the present application, the detector 43 may be a flow sensor or a flow meter to detect the liquid nitrogen flow value of the liquid nitrogen flowing out of the nitrogen storage tank 9.
Further, the liquid nitrogen equipment may further include a pressurizing pump 3 configured to pressurize the liquid nitrogen flowing out of the nitrogen storage tank 9, and the nitrogen storage tank 9 is simultaneously communicated with the liquid path system 1 and the air temperature type heat exchange system 6 through the pressurizing pump 3. Through force (forcing) pump 3, convert the liquid nitrogen that stores up nitrogen tank 9 outflow into high-pressure liquid, then this high-pressure liquid is through at air temperature formula heat exchange system 6, or at air temperature formula heat exchange system 6 and the heat transfer of liquid way system 1, converts into high-pressure nitrogen gas.
In the present embodiment, the liquid nitrogen apparatus may further include a heat pump system 2; the heat pump system 2 includes a heat pump 21, the heat pump 21 includes a refrigerant compressor, an evaporator, and an expansion valve, and the heat pump 21 converts heat in the outside air into heat of an internal medium by absorbing heat from the outside environment through the refrigerant compressor, the evaporator, and the expansion valve and provides the heat to the fluid path system 1. By absorbing heat from the external environment, the heat in the external air is converted into the heat of the internal medium by means of the refrigerant compressor, the evaporator and the expansion valve
Specifically, the liquid path system 1 comprises a liquid nitrogen heat absorption pipeline 11 and a first heat exchange medium heat release pipeline 12, heat exchange can be carried out between the liquid nitrogen heat absorption pipeline 11 and the first heat exchange medium heat release pipeline 12, the heat pump system 2 further comprises a first heat exchange medium heat absorption pipeline 22 and a second heat exchange medium heat release pipeline 23, heat exchange can be carried out between the first heat exchange medium heat absorption pipeline 22 and the second heat exchange medium heat release pipeline 23, and the heat pump 21 comprises a second heat exchange medium heat absorption pipeline 211; the first heat exchange medium heat release pipeline 12 is communicated with the first heat exchange medium heat absorption pipeline 22 end to form a circulation loop, and the second heat exchange medium heat release pipeline 23 is communicated with the second heat exchange medium heat absorption pipeline 211 end to form a circulation loop. Through the arrangement mode, through heat exchange between the liquid nitrogen heat absorption pipeline 11 and the first heat exchange medium heat release pipeline 12, liquid nitrogen in the liquid nitrogen heat absorption pipeline 11 absorbs heat of a first heat exchange medium in the first heat exchange medium heat release pipeline 12 and is converted into nitrogen through evaporation and vaporization, the temperature of the first heat exchange medium in the first heat exchange medium heat release pipeline 12 is reduced after heat exchange, then the first heat exchange medium returns to the first heat exchange medium heat absorption pipeline 22 of the heat pump system 2 to absorb heat of a second heat exchange medium in the second heat exchange medium heat release pipeline 211, and the first heat exchange medium in the first heat exchange medium heat absorption pipeline 22 circulates back to the first heat exchange medium heat release pipeline 12 after absorbing heat to continuously exchange heat with the liquid nitrogen heat absorption pipeline; meanwhile, after the second heat exchange medium in the second heat exchange medium heat release pipe 23 exchanges heat with the first heat exchange medium in the first heat exchange medium heat absorption pipe 22, the temperature of the second heat exchange medium is reduced, the second heat exchange medium returns to the second heat exchange medium heat absorption pipe 211 of the heat pump 21 to absorb heat from the external environment through the heat pump 21, and then returns to the second heat exchange medium heat release pipe 23 to continue to exchange heat with the first heat exchange medium in the first heat exchange medium heat absorption pipe 22. That is, the first heat exchange medium continuously absorbs and releases heat in the first heat exchange medium heat absorption pipe 22 and the first heat exchange medium heat release pipe 23 so as to be circulated reciprocally, and the second heat exchange medium continuously absorbs and releases heat in the second heat exchange medium heat absorption pipe 211 and the second heat exchange medium heat release pipe 23 so as to be circulated reciprocally. Through setting up first heat transfer medium heat absorption pipeline 22 and second heat transfer medium heat release pipeline 23 for heat pump 21 absorbs the heat and provides the heat for the liquid nitrogen heat absorption pipeline through second heat transfer medium heat absorption pipeline 211, second heat transfer medium heat release pipeline 23, first heat transfer medium heat absorption pipeline 22, first heat transfer medium heat release pipeline 12 in the external environment, can realize between heat pump 21 and the liquid way system 1 in pipeline pressure and with the matching in flow.
In this embodiment, the liquid nitrogen apparatus may further include a skid system 7, and the nitrogen storage tank 9, the air temperature type heat exchange system 6, the liquid path system 1, the pressure pump 3, and the heat pump system 2 are all fixedly disposed on the skid system 7. The different systems, the nitrogen storage tank 9 and the pressure pump 3 are arranged on the skid frame system 7, and the skid frame system 7 is used as a bearing part of the whole device, so that the liquid nitrogen equipment can be conveniently moved and transported.
In addition, the liquid nitrogen equipment can further comprise a nitrogen exhaust pipe 8, the air temperature type heat exchange system 6 comprises a first nitrogen outlet 61, the liquid path system 1 comprises a second nitrogen outlet 13, and the first nitrogen outlet 61 and the second nitrogen outlet 13 are communicated with the nitrogen exhaust pipe 8 at the same time, so that two paths of high-pressure nitrogen can be discharged after being converged in the nitrogen exhaust pipe 8 and used for oilfield production increasing operation.
The liquid nitrogen equipment that this application embodiment provided is through air temperature formula heat transfer system 6 when little discharge capacity, relies on heat in the air and the direct heat exchange of liquid nitrogen to come the evaporation liquid nitrogen, start heat pump system 2 when the discharge capacity risees gradually, rely on heat between air temperature formula heat transfer system 6 and the heat pump system 2 both to evaporate the liquid nitrogen, come full play respective performance through reasonable pipe-line system design between the two, not only energy-concerving and environment-protective, equipment operation economic nature is better moreover. Through increasing heat pump system 2, can be more from absorbing the heat in the air circumstance, not only reduced the volume and the weight of liquid nitrogen equipment, realized the big discharge capacity operation operating mode of liquid nitrogen moreover.
Because the liquid nitrogen equipment that this application embodiment provided can all use air temperature formula heat recovery system 6 to provide partly heat in whole working process, because air temperature formula heat transfer system 6 need not consume the electric energy, consequently guaranteeing the energy resource consumption of the very big saving liquid nitrogen equipment under the prerequisite that big, little discharge capacity all can obtain satisfying, reduced running cost.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A liquid nitrogen apparatus, comprising: the system comprises a nitrogen storage tank, an air temperature type heat exchange system, a liquid path system, a detector and a controller;
the nitrogen storage tank is communicated with the air temperature type heat exchange system and the liquid path system simultaneously;
the detector is configured to detect the liquid nitrogen flow of the liquid nitrogen flowing out of the nitrogen storage tank and feed back to the controller;
the controller is used for controlling the connection state between the nitrogen storage tank and the air temperature type heat exchange system and between the nitrogen storage tank and the liquid path system to be in one of the following two states according to the feedback of the detector:
in the first state, the nitrogen storage tank is simultaneously communicated with the air temperature type heat exchange system and the liquid path system;
and in the second state, the nitrogen storage tank is only communicated with the air temperature type heat exchange system.
2. The liquid nitrogen apparatus of claim 1, wherein the nitrogen storage tank is always in communication with the air temperature heat exchange system, and the controller comprises a first valve disposed between the nitrogen storage tank and the liquid path system; the first valve controls the on-off state of the nitrogen storage tank and the liquid path system.
3. The liquid nitrogen apparatus according to claim 1, wherein the controller comprises a first valve and a second valve, the first valve is disposed between the nitrogen storage tank and the liquid path system, the second valve is disposed between the nitrogen storage tank and the air temperature type heat exchange system, the first valve controls the on-off state of the nitrogen storage tank and the liquid path system, and the second valve controls the on-off state of the nitrogen storage tank and the air temperature type heat exchange system.
4. The liquid nitrogen plant of claim 1, wherein the detector and controller are integrated into a control system.
5. The liquid nitrogen plant of claim 1, wherein the detector is a flow sensor or a flow meter.
6. The liquid nitrogen apparatus of claim 1, further comprising a pressurization pump configured to pressurize the liquid nitrogen flowing out of the nitrogen storage tank, the nitrogen storage tank being in simultaneous communication with the liquid path system and the air temperature heat exchange system, respectively, via the pressurization pump.
7. The liquid nitrogen plant of claim 6, further comprising a heat pump system;
the heat pump system includes a heat pump for generating heat and providing the heat to the fluid path system.
8. The liquid nitrogen plant of claim 7, wherein the liquid path system comprises a liquid nitrogen heat absorption pipeline and a first heat exchange medium heat release pipeline, heat exchange can be performed between the liquid nitrogen heat absorption pipeline and the first heat exchange medium heat release pipeline, the heat pump system further comprises a first heat exchange medium heat absorption pipeline and a second heat exchange medium heat release pipeline, heat exchange can be performed between the first heat exchange medium heat absorption pipeline and the second heat exchange medium heat release pipeline, and the heat pump comprises a second heat exchange medium heat absorption pipeline;
the first heat exchange medium heat release pipeline is communicated with the first heat exchange medium heat absorption pipeline end to form a circulation loop, and the second heat exchange medium heat release pipeline is communicated with the second heat exchange medium heat absorption pipeline end to form a circulation loop.
9. The liquid nitrogen apparatus according to claim 8, further comprising a skid system, wherein the nitrogen storage tank, the air-temperature heat exchange system, the liquid path system, the pressure pump and the heat pump system are all fixedly arranged on the skid system.
10. The liquid nitrogen equipment of claim 1, further comprising a nitrogen exhaust pipe, wherein the air temperature heat exchange system comprises a first nitrogen outlet, the liquid path system comprises a second nitrogen outlet, and the first nitrogen outlet and the second nitrogen outlet are simultaneously communicated with the nitrogen exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276932.9U CN214890523U (en) | 2020-12-29 | 2020-12-29 | Liquid nitrogen equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276932.9U CN214890523U (en) | 2020-12-29 | 2020-12-29 | Liquid nitrogen equipment |
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| CN214890523U true CN214890523U (en) | 2021-11-26 |
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| CN202023276932.9U Active CN214890523U (en) | 2020-12-29 | 2020-12-29 | Liquid nitrogen equipment |
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