CN102563351A - Gas depressurizing heating device and gas depressurizing heating method - Google Patents
Gas depressurizing heating device and gas depressurizing heating method Download PDFInfo
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- CN102563351A CN102563351A CN2012100441556A CN201210044155A CN102563351A CN 102563351 A CN102563351 A CN 102563351A CN 2012100441556 A CN2012100441556 A CN 2012100441556A CN 201210044155 A CN201210044155 A CN 201210044155A CN 102563351 A CN102563351 A CN 102563351A
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Abstract
The invention discloses a gas depressurizing heating device and a gas depressurizing heating method. The gas depressurizing heating device comprises a vortex tube, a high pressure pipeline and a low pressure pipeline, wherein the vortex tube is connected with a cold flow output pipe and a hot flow output pipe; and the vortex tube is provided with a pressure relief nozzle. The device further comprises a cooling device and a heat conduction piece, wherein the cooling device and the heat transmission piece are arranged on the cold flow output pipe; and one end of the cold flow output pipe is connected with the vortex tube, and the other end of the cold flow output pipe is communicated with the hot flow output pipe and further communicated with the low pressure pipeline. The gas depressurizing heating method comprises the following steps: partial heat of the vortex hot flow is conducted through the pressure relief nozzle, and the vortex cold flow is heated by the cooling device and joins the vortex hot flow so as to output low pressure gas. The pressure relief nozzle is heated through the heat conduction piece, thereby preventing frost block; the vortex cold flow is heated by the cooling device and is further mixed with the vortex hot gas, so that the temperature of the low pressure gas discharged is increased without extra energy; and meanwhile other products can be produced using the cooling device, so that energy-saving circular economy is realized.
Description
Technical field
The present invention relates to a kind of gas decompression heating plant and gas decompression heating means.
Background technique
Because but gas belongs to hydraulic fluid, pressurized gas such as compressed natural gas are from the high pressure to low pressure, and according to equation of state of gas and first, second law of thermomechanics, the temperature of rock gas itself is bound to descend.The high-pressure natural gas temperature of the temperature of low pressure natural gas that the back flows into downstream so reduce pressure before than step-down is low, and it is the same with joule-thomson throttle effect that temperature reduces degree.When the rock gas pressure regulation, 0.1MPa whenever falls in pressure, and temperature will reduce about 0.6 ℃; Compressed natural gas (also being CNG) pressure regulation at present; Generally be from the 20MPa 0.1-2.5MPa that reduces pressure, decompression back temperature reduces violent, can produce fearful influence to downstream line and valve.Pipe natural gas generally is from the 4-12MPa 0.3-2.5MPa that reduces pressure, and this decompression process also can cause downstream line and valve temperature low excessively.Rock gas all can have repeatedly pressurization, decompression in course of conveying, in decompression process, can cause the gas flow temperature rapid drawdown, may cause downstream low-pressure gas output pipeline valve to freeze and block up perhaps bursting by freezing and security incident occurs.Existing technical solution mainly contains two kinds: a kind of is to build water-heating boiler in voltage regulating station, and the combustion gas of decompression is heated with hot water, and a kind of is to use electric heating.Which kind of mode of heating all can consume the huge extra energy.
Chinese patent CN201547495U discloses a kind of compressed natural gas air feeder that utilizes vortex tube to reduce pressure and heat; Compressed natural gas is through vortex tube decompression and separate into two strands of air-flows one is the eddy current cold flow; One is the eddy current hot-fluid; The eddy current type of thermal communication is crossed the compressed natural gas before the heat exchanger preheating decompression, and the eddy current cold flow directly is discharged to downstream line.Though the eddy current hot-fluid that this scheme utilizes compressed natural gas self to produce heats compressed natural gas, solved the problem of the preceding preheating of compressed natural gas decompression, do not solve the problem that downstream low-pressure gas output pipeline and valve freeze stifled or bursting by freezing.
Of Fig. 1; The working principle of vortex tube 10 is following: pressurized gas flow into ring-shaped air chamber 120 by air inlet nozzle 110; Spray into swirler rotary chamber 140 and do high speed rotary motion therein through nozzle 130; Through inside and outside gas energy exchange, the external heat air-flow flows out from the hot-fluid outlet through hot-fluid output tube 50, and inner cold airflow flows out from the cold flow outlet through swirler rotary chamber 140.Can regulate hot and cold air ratio and temperature through rotation adjusting hot-fluid valve 510.
According to law of conservation of energy,, also produced cold energy simultaneously though produced heat energy through vortex tube; The rock gas that gets into vortex tube in this process can be regarded a system as; Cold flow and hot-fluid all are the products of this internal system Conversion of energy, and this system does not obtain energy, the just Conversion of energy of internal system from the external world; Therefore the low-pressure gas temperature of final output is lower than the preceding gas of decompression; Though such scheme has heated pressurized gas, the post-decompression temperature of gas also can rapid drawdown, also can cause stifled or the bursting by freezing of freezing of downstream low-pressure gas output pipeline and valve.
Summary of the invention
The object of the present invention is to provide temperature before the post-decompression temperature of a kind of gas is not less than decompression, do not expend any extra energy, energy-saving and emission-reduction, safe gas decompression heating plant and gas decompression heating means.
In order to solve the problems of the technologies described above; The invention provides a kind of gas decompression heating plant; Comprise vortex tube, pressurized gas be incorporated into the high pressure pipe line and the low pressure pipeline of said vortex tube; Become low-pressure gas through pressurized gas step-down behind the said vortex tube and enter said low pressure pipeline; Said vortex tube is connected with cold flow output tube and hot-fluid output tube, and said vortex tube is provided with said high pressure pipe line and is communicated with the pressure release nozzle, and said gas decompression heating plant also comprises the heat transfer piece of getting cool equipment and the eddy current hot-fluid partial heat energy that said vortex tube produces being conducted to said pressure release nozzle; The said cool equipment of getting is arranged on the said cold flow output tube, and an end of said cold flow output tube is connected with said vortex tube, and the other end is communicated with said hot-fluid output tube; Said cold flow output tube is communicated with said low pressure pipeline with the place that is communicated with of said hot-fluid output tube.
Wherein, said high pressure pipe line is disposed with the control unit of high-pressure ball valve and control pressurized gas throughput along airflow direction, and said low pressure pipeline is provided with the pressure transducer that detects the low pressure pipeline internal pressure and pressure signal transmission given said control unit.
Wherein, said control unit is cut-off valve, or is the combination of cut-off valve and modulating valve.
Wherein, the said cool equipment of getting is radiator or heat exchanger.
Wherein, said hot-fluid output tube is provided with the modulating valve of control hot-fluid flow.
Wherein, said low pressure pipeline is provided with low pressure ball valve and safety valve.
Wherein, said hot-fluid output tube is provided with thermal insulation layer outward.
Wherein, said heat transfer piece be heat pipe, or for the transmission hot gas pipeline.
Correspondingly; The present invention also provides a kind of gas decompression heating means; Utilize vortex tube that high pressure air reducing is produced eddy current hot-fluid and eddy current cold flow; Through heat transfer piece the partial heat energy of said eddy current hot-fluid is conducted to the pressure release nozzle place that is arranged on the vortex tube, said eddy current cold flow converges the output low-pressure gas through getting the cool equipment back of heating up with said eddy current hot-fluid.
Wherein, detect the pressure of said low-pressure gas through pressure transducer, and give the control unit of control pressurized gas throughput with pressure signal transmission, said control unit is located on the high pressure pipe line of input pressurized gas.
Gas decompression heating plant provided by the invention comes the pressure release nozzle is heated through heat transfer piece, avoids the pressure release nozzle to freeze stifled phenomenon; The eddy current cold flow is got cool equipment through getting into through the cold flow output tube, and after cold was fully used, temperature rose; Mix with eddy current hot gas again, enter the downstream low pressure pipeline, finally make the temperature of the low-pressure gas of discharge be not less than the preceding gas of decompression; More energy-conservation significantly than water-heating boiler and electric heating, improve Security, and saved raw material and investment significantly; Produce the product of the high economic value of valency in the time of energy-conservation again with the eddy current cold energy, further reach the requirement of cycles, economized economy.
Gas provided by the invention decompression heating means, the eddy current cold flow heats up through getting cool equipment, after getting cool equipment place cold and being fully used; The eddy current cold flow point rises, and mixes with eddy current hot gas again, and mixed low-pressure gas temperature can be not less than the temperature before the decompression; Reach and do not expend the purpose that any additional energy source just can heat post-decompression gas; More energy-conservation significantly than water-heating boiler and electric heating, improve Security, and saved raw material and investment significantly; Get cool equipment and make cold energy obtain utilizing, produce the product of the high economic value of valency, further reach the requirement of cycles, economized economy; The partial heat energy of eddy current hot-fluid is incorporated into the pressure release nozzle place of vortex tube, so that the pressure release nozzle is heated, avoids this position to freeze stifled phenomenon.
Description of drawings
In order to be illustrated more clearly in technological scheme of the present invention; To do to introduce simply to the accompanying drawing of required use in the mode of execution below; Obviously, the accompanying drawing in describing below only is mode of executions more of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of vortex tube;
Fig. 2 is the schematic representation of the gas decompression heating plant that provides of embodiment of the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the present invention below, the technological scheme in the embodiment of the present invention will be carried out clear, intactly description.
See also Fig. 2; A kind of gas decompression heating plant that embodiment of the present invention provides; Comprise vortex tube 1, pressurized gas are incorporated into the high pressure pipe line 2 and the low pressure pipeline 3 of vortex tube, the low-pressure gas that 1 back pressurized gas step-down becomes through vortex tube enters low pressure pipeline 3.Vortex tube is connected with cold flow output tube 4 and hot-fluid output tube 5, and vortex tube 1 is provided with the pressure release nozzle 10 that is communicated with high pressure pipe line 2.Gas decompression heating plant also comprises the heat transfer piece 6 of getting cool equipment 7 and the eddy current hot-fluid partial heat energy that said vortex tube 1 produces being conducted to pressure release nozzle 10 that is arranged on the cold flow output tube 4; Wherein, Getting cool equipment 7 is arranged on the cold flow output tube 4; One end of cold flow output tube 4 is connected with vortex tube 1, and the other end is communicated with hot-fluid output tube 5; Cold flow output tube 4 is communicated with low pressure pipeline 3 with the place that is communicated with of hot-fluid output tube 5.
As shown in Figure 2; Pressurized gas get into vortex tube 1, accelerate to the airspeed about local velocity of sound through pressure release nozzle 10, then at the vortex tube 1 inner high speed rotating air-flow that produces; Obtain two strands of stream swirl cold flows and eddy current hot-fluid, and respectively through cold flow output tube 4 and 5 outputs of hot-fluid output tube.The heat energy separated into two parts of eddy current hot-fluid; Sub-fraction is through heat transfer piece 6 heating pressure release nozzles 10; Another part enters downstream low pressure pipeline 3 through hot-fluid output tube 5, in order to keep the heat of eddy current hot gas, outside hot air flow flows through hot-fluid output tube 5, is provided with the thermal insulation layer (not shown).In the present embodiment, preferably heat transfer piece 6 is a heat pipe, through heat pipe the partial heat energy of eddy current hot-fluid is guided to pressure release nozzle 10 places and heats pressure release nozzle 10.As additional embodiments, heat transfer piece 6 also can be the pipeline of transmission hot gas here, directly the hot gas of part eddy current hot-fluid guiding 10 places, pressure release nozzle place, it is heated.In the practical implementation process, heat transfer piece 6 can directly be connected the eddy current hot-fluid equipped at outlet port of vortex tube 1, also can be connected on the hot-fluid output tube 5.Because pressurized gas reach very high flow velocity at pressure release nozzle 10 places, so gas can be lowered the temperature, come pressure release nozzle 10 is heated through heat transfer piece 6, avoid pressure release nozzle 10 to freeze stifled phenomenon.The eddy current cold flow is through getting cool equipment 7 through cold flow output tube 4 processes, and after cold was fully used, the eddy current cold flow point rose, and mixes with eddy current hot gas again, enters the low pressure pipeline 3 in downstream.
The eddy current cold flow is through getting cool equipment 7; Get cool equipment 7 and be equipment such as radiator or heat exchanger, cold can be fully utilized, and cold can utilize cold energy users such as getting the peripheral air-conditioning of cool equipment 7 supplies, freezer, brewery; Can also utilize cold energy to produce product, such as ice, dry ice etc.; Cold energy also can directly loose in atmosphere through getting cool equipment 7; Whatsoever mode is after cold energy is taken away; The temperature of eddy current cold flow can rise; Reach and do not expend the purpose that any additional energy source just can heat post-decompression gas with the temperature before all can being not less than decompression after the eddy current hot-fluid mixes, the while cold energy obtains utilizing the effect that reaches energy-saving and emission-reduction.
In the present embodiment, for the ease of control decompression heating process, high pressure pipe line 2 is disposed with the control unit of high-pressure ball valve 21 and control pressurized gas throughput along airflow direction; Low pressure pipeline 3 is provided with the pressure transducer 32 that detects low pressure pipeline 3 internal pressures and pressure signal transmission given control unit; In the present embodiment, control unit is a cut-off valve 22, simultaneously; Control unit also can be the combination of cut-off valve 22 and modulating valve, perhaps other forms of control unit.Also be provided with low pressure ball valve 31 and safety valve 33 on the low pressure pipeline 3, to improve the Safety performance of entire equipment.Hot-fluid output tube 5 is provided with the modulating valve 51 of control hot-fluid flow, so that regulate hot and cold air ratio and temperature.
Cool equipment 7 intensifications are got in the utilization of eddy current cold flow in the gas decompression heating plant of the present invention; Eddy current cold flow and eddy current hot-fluid are converged, finally make the temperature of the low-pressure gas of discharge be not less than the preceding gas of decompression, more energy-conservation significantly than water-heating boiler and electric heating; Improved Security; And save raw material and investment significantly, and produce the product of the high economic value of valency in the time of energy-conservation again with the eddy current cold flow, further reach the requirement of cycles, economized economy.
Be a concrete example that utilizes gas of the present invention decompression heating plant that pressurized gas are handled below: the high-pressure natural gas inlet pressure is 6.8MPa, and temperature is 7 ℃, through vortex tube 1 0.4MPa that reduces pressure; Produce eddy current cold flow and eddy current hot-fluid simultaneously; The flow proportional of eddy current cold flow and eddy current hot-fluid is 6: 4, and the eddy current cold flow point is-52 ℃, and the hot-fluid temperature is 20 ℃; Get cold through getting 7 pairs of eddy current cold flows of cool equipment; Make the temperature of eddy current cold flow be elevated to 5.6 ℃, the cold flow of getting after cold mixes the low pressure pipeline 3 that enters downstream with hot-fluid, and mixed temperature is 11 ℃.
Another concrete example: the high-pressure natural gas inlet pressure is 2.4MPa, and temperature is 7 ℃, through vortex tube 1 0.4MPa that reduces pressure; Produce eddy current cold flow and eddy current hot-fluid simultaneously, the flow proportional of eddy current cold flow and eddy current hot-fluid is 6: 4, and cold flow point is-31.7 ℃; The hot-fluid temperature is 40.6 ℃, gets coldly through getting 7 pairs of eddy current cold flows of cool equipment, makes the temperature of eddy current cold flow be elevated to 5.6 ℃; The cold flow of getting after cold mixes the low pressure pipeline 3 that enters downstream with hot-fluid, mixed temperature is 19.6 ℃.
Correspondingly, the present invention also provides a kind of gas decompression heating means, adopts above-mentioned gas decompression heating plant; Through high pressure pipe line 2, pressure release nozzle 10 pressurized gas are introduced vortex tube 1, utilize vortex tube 1 that high pressure air reducing is produced eddy current hot-fluid and eddy current cold flow, wherein; The eddy current cold flow heats up through getting cool equipment 7 through cold flow output tube 4, and after getting cool equipment 7 place's colds and being fully used, the eddy current cold flow point rises; Mix with eddy current hot gas again; Mixed low-pressure gas temperature can be not less than the temperature before the decompression, reaches not expend the purpose that any additional energy source just can heat post-decompression gas, and is more energy-conservation significantly than water-heating boiler and electric heating; Improve Security, and saved raw material and investment significantly; Get cool equipment 7 and make cold energy obtain utilizing, produce the product of the high economic value of valency, further reach the requirement of cycles, economized economy.
With a part of thermal energy conduction of eddy current hot-fluid pressure release nozzle 10 places,, avoid this position to freeze stifled phenomenon through heat transfer piece 6 so that pressure release nozzle 10 is heated to vortex tube 1; After eddy current cold flow after another part heat energy is followed eddy current type of thermal communication superheat flow output tube 5 and heated up converges, by low pressure pipeline 3 output low-pressure gases.
Simultaneously, the eddy current hot-fluid that vortex tube is discharged is incubated processing, for example outside hot air flow flows through hot-fluid output tube 5, thermal insulation layer is set, to keep the heat of eddy current hot gas.
Through being arranged on the pressure of the pressure transducer 32 detection low-pressure gases on the low pressure pipeline 3; And with the control unit of pressure signal transmission to control pressurized gas throughput; Control unit is located on the high pressure pipe line 2 of input pressurized gas; So that control decompression heating process, the Safety performance of raising entire equipment.In the present embodiment, control unit is a cut-off valve 22, and simultaneously, control unit also can be the combination of cut-off valve 22 and modulating valve, perhaps other forms of control unit.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.
Claims (10)
1. gas decompression heating plant; Comprise vortex tube, pressurized gas be incorporated into the high pressure pipe line and the low pressure pipeline of said vortex tube; Become low-pressure gas through pressurized gas step-down behind the said vortex tube and enter said low pressure pipeline; Said vortex tube is connected with cold flow output tube and hot-fluid output tube; It is characterized in that said vortex tube is provided with the pressure release nozzle that is communicated with said high pressure pipe line, said gas decompression heating plant also comprises the heat transfer piece of getting cool equipment and the eddy current hot-fluid partial heat energy that said vortex tube produces being conducted to said pressure release nozzle; The said cool equipment of getting is arranged on the said cold flow output tube, and an end of said cold flow output tube is connected with said vortex tube, and the other end is communicated with said hot-fluid output tube; Said cold flow output tube is communicated with said low pressure pipeline with the place that is communicated with of said hot-fluid output tube.
2. gas decompression heating plant according to claim 1; It is characterized in that; Said high pressure pipe line is disposed with the control unit of high-pressure ball valve and control pressurized gas throughput along airflow direction, and said low pressure pipeline is provided with the pressure transducer that detects the low pressure pipeline internal pressure and pressure signal transmission given said control unit.
3. gas according to claim 2 decompression heating plant is characterized in that, said control unit is cut-off valve, or be the combination of cut-off valve and modulating valve.
4. gas decompression heating plant according to claim 1 is characterized in that the said cool equipment of getting is radiator or heat exchanger.
5. gas decompression heating plant according to claim 1 is characterized in that said hot-fluid output tube is provided with the modulating valve of control hot-fluid flow.
6. gas decompression heating plant according to claim 1 is characterized in that said low pressure pipeline is provided with low pressure ball valve and safety valve.
7. gas decompression heating plant according to claim 1 is characterized in that said hot-fluid output tube is provided with thermal insulation layer outward.
8. gas according to claim 1 decompression heating plant is characterized in that, said heat transfer piece is heat pipe, or be the pipeline of transmission hot gas.
9. gas decompression heating means; Utilize vortex tube that high pressure air reducing is produced eddy current hot-fluid and eddy current cold flow; It is characterized in that; Through heat transfer piece the partial heat energy of said eddy current hot-fluid is conducted to the pressure release nozzle place that is arranged on the vortex tube, said eddy current cold flow converges the output low-pressure gas through getting the cool equipment back of heating up with said eddy current hot-fluid.
10. gas decompression heating means according to claim 9; It is characterized in that; Detect the pressure of said low-pressure gas through pressure transducer, and give the control unit of control pressurized gas throughput with pressure signal transmission, said control unit is located on the high pressure pipe line of input pressurized gas.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104121716A (en) * | 2013-04-27 | 2014-10-29 | 中国石油化工股份有限公司 | Vortex tube |
| CN104165269A (en) * | 2013-05-17 | 2014-11-26 | 中国石油化工股份有限公司 | Throttling device and method for performing throttling by using throttling device |
| CN105387346A (en) * | 2015-10-23 | 2016-03-09 | 辽宁科技大学 | Self-circulation gas anti-freezing house-service device |
| CN104896124B (en) * | 2015-04-17 | 2017-04-05 | 中国石油大学(华东) | A kind of CO2Multi-level throttle frost valve |
| CN107806568A (en) * | 2017-11-24 | 2018-03-16 | 乐山川天燃气输配设备有限公司 | Vortex hot type pressure regulator |
| CN107810454A (en) * | 2015-06-25 | 2018-03-16 | 彼得罗菲奥伦蒂尼有限公司 | For the system and method for the pressure for adjusting gas |
| CN112555237A (en) * | 2020-12-11 | 2021-03-26 | 中国石油大学(华东) | Vortex tube induced shock wave hydrate inhibition device |
| CN116428758A (en) * | 2023-05-05 | 2023-07-14 | 哈尔滨工程大学 | Vortex tube variable-temperature Bernoulli injection backflow large-temperature-difference radiator |
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| CN107810454B (en) * | 2015-06-25 | 2020-12-01 | 彼得罗菲奥伦蒂尼有限公司 | System and method for regulating the pressure of a gas |
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| CN107806568A (en) * | 2017-11-24 | 2018-03-16 | 乐山川天燃气输配设备有限公司 | Vortex hot type pressure regulator |
| CN112555237A (en) * | 2020-12-11 | 2021-03-26 | 中国石油大学(华东) | Vortex tube induced shock wave hydrate inhibition device |
| CN116428758A (en) * | 2023-05-05 | 2023-07-14 | 哈尔滨工程大学 | Vortex tube variable-temperature Bernoulli injection backflow large-temperature-difference radiator |
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