CN104141881A - Heat transfer system utilizing normal temperature compressor to compress cryogenic medium - Google Patents
Heat transfer system utilizing normal temperature compressor to compress cryogenic medium Download PDFInfo
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- CN104141881A CN104141881A CN201410342505.6A CN201410342505A CN104141881A CN 104141881 A CN104141881 A CN 104141881A CN 201410342505 A CN201410342505 A CN 201410342505A CN 104141881 A CN104141881 A CN 104141881A
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Abstract
The invention discloses a heat transfer system utilizing a normal temperature compressor to compress a cryogenic medium. The heat transfer system comprises a low-temperature air inlet pipeline, an air bathing type heat exchanger, a technical air circulation heat exchanger, an electric heater and a compressor unit, wherein the low-temperature air inlet pipeline is connected with a primary filter and then is divided into two branches; one branch is connected with the technical air pipeline through a first valve while the other branch is connected with the air bathing type heat exchanger through a second valve and then is connected with the technical air pipeline; the technical air pipeline is connected with an inlet of the electric heater through the technical air circulation heat exchanger; an outlet of the electric heater is connected with the inlet of the compressor; the outlet of a final-stage exhaust buffer tank of the compressor is connected with a second inlet of the technical air circulation heat exchanger through a final-stage pipeline; a second outlet of the technical air circulation heat exchanger is connected with an output pipe net. According to the invention, the energy resource is reasonably utilized and the energy consumption is greatly saved.
Description
Technical field
The present invention relates to a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium.
Background technique
The low-pressure cylinder material that normal-temperature natural-gas compressor bank adopts is generally alloy cast iron, and the physicochemical property of this material is in the time being characterized by more than-40 DEG C aspect temperature, and its mechanical property is relatively stable, and the compressed media temperature requirement therefore adapting to is more than-40 DEG C.LNG (Liquefied Natural Gas) is as a kind of clean, efficient energy, and the ratio in energy supply increases sharply, and becomes the focus that world's oil and gas industry is new.In the storage and transport process of LNG, be subject to the impact of compression pump in environmental factor and conveying, LNG can produce a large amount of loose steams----Boil Off Gas (being called for short BOG), its treatment process enters the application of compressor, the temperature of BOG is minimum is-161.5 DEG C (boiling points of methane under normal pressure), has exceeded the Applicable scope of existing normal temperature compressed unit.
At present, for the deep cooling compression of BOG medium, the basic import of compressor (Burkhard, Chinese latitude that, Samsung etc.), mostly is two stage compression, and in standing, circulation is used.Domestic aspect deep freeze compressor, by changing the material of cylinder sleeve, there is model machine to try out in Taian Shandong ethylene project, not yet verify by industry.Normal temperature compressed for BOG medium, all there is patent report various countries to this, to be Hamworthy Gas Systems AS obtain bulletin on June 3rd, 2009 in Norway to the patent close with the present invention----for LNG boil-off gas being preheated to the method and apparatus of normal temperature before compression at liquefaction system again, the 3rd irrelevant class medium of BOG medium in this patent and compression process carries out heating up after heat exchange, cold energy is wasted, thereafter the high-temperature high-pressure air flow that compression process produces needs again the energy cooling in the time entering next process, is unfavorable for the comprehensive utilization of the energy.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium, this system energy reasonable energy utilization resource, energy efficient greatly for the technical problem existing in above-mentioned prior art.
The technical solution adopted in the present invention is: a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium, it is characterized in that: it comprises low temperature air inlet pipeline, empty bath formula heat exchanger, process gas circulation heat exchanger, electric heater, Compressor Group, after being connected with initial filtrator, described low temperature air inlet pipeline is divided into two-way, first valve of leading up to is connected with process gas pipeline, separately lead up to after the second valve is connected with empty bath formula heat exchanger and be connected with process gas pipeline again, described process gas pipeline is connected with the first entrance of process gas circulation heat exchanger, the first outlet of process gas circulation heat exchanger is connected with the entrance of electric heater, the outlet of electric heater is connected with suction port of compressor, the outlet of described final compressor exhaust knock out drum is connected with the second entrance of process gas circulation heat exchanger by final stage pipeline, the second outlet of process gas circulation heat exchanger is connected with outer defeated pipe network.
By technique scheme, described process gas circulation heat exchanger is two, be the first process gas circulation heat exchanger and the second process gas circulation heat exchanger, both are parallel with one another, described compressor bank is two stage compression at least, the outlet of the wherein one-level exhaust knock out drum of described compressor is connected with the second entrance of the first process gas circulation heat exchanger, the second outlet of the first process gas circulation heat exchanger is connected with the entrance of compressor next stage air inlet knock out drum, the outlet of the final stage knock out drum of described compressor is connected with the second entrance of the second process gas circulation heat exchanger, the second outlet of described the second process gas circulation heat exchanger is connected with outer defeated pipe network.
By technique scheme, the first valve and the second valve are pneumatic valve.
By technique scheme, on the outlet port of the ingress of process gas circulation heat exchanger, outlet port, heater, final stage pipeline, be provided with temperature monitoring instrument.
The obtained beneficial effect of the present invention is: after compressor start, in process gas circulation heat exchanger, exchange by compressed media cold and hot energy, the deep cooling medium of guarantee after process gas circulation heat exchanger can enter normal temperature compressed unit and compress, ensure does not provide under the prerequisite of other energy in final compressor simultaneously, high temperature media after multistage compression can meet the temperature requirement that enters outer defeated pipe network after process gas circulation heat exchanger, the present invention reasonably utilizes energy resources, has saved greatly energy consumption.
Brief description of the drawings
Fig. 1 is a kind of embodiment's provided by the invention schematic flow sheet.
Fig. 2 is another kind of embodiment's provided by the invention schematic flow sheet.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment one:
As shown in Figure 1, a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium that the present embodiment provides, it comprises low temperature air inlet pipeline 1, empty bath formula heat exchanger 7, process gas circulation heat exchanger 12, electric heater 16, Compressor Group, described low temperature air inlet pipeline 1 and initial filtrator 2, after connecting, expansion pipe nipple 3 is divided into two-way, first pneumatic valve 6 of leading up to is connected with process gas pipeline 8, separately lead up to after the second pneumatic valve 4 is connected with empty bath formula heat exchanger 7 with pipeline 5 and be connected with process gas pipeline 8 by pipeline 10 again, described process gas pipeline 8 is connected with the first entrance of process gas circulation heat exchanger 12, the first outlet of process gas circulation heat exchanger 12 is connected with the entrance of electric heater 16, the outlet of electric heater 16 is connected with suction port of compressor, the outlet of described final compressor exhaust knock out drum is connected with the second entrance of process gas circulation heat exchanger 12 by final stage pipeline 19, the second outlet of process gas circulation heat exchanger 12 is connected with outer defeated pipe network by pipeline 11.
Wherein, on the outlet port of the ingress of process gas circulation heat exchanger, outlet port, heater, final stage pipeline 19, pipeline 11, be provided with temperature monitoring instrument 9,14,18,20.First, second pneumatic valve adopting in the present invention is self-acting valve, and temperature monitoring instrument is the instrument with transporting function, makes the present invention can realize automation mechanized operation and long-range judgement.
Working procedure of the present invention is: come from the process gas of low temperature air inlet pipeline 1 after prefilter 2 filters, through expansion joint 3 and the second pneumatic valve 4, pipeline 5(now the first pneumatic valve 6 in closed condition) enter empty bath formula heater 7, wherein, empty bath formula heater 7 is using surrounding atmosphere as thermal source, using follow-up compressor as kinetic pump, draw heat energy from nature and provide initial temperature rise for cold medium.After initially heating process gas through the functional equivalent of process gas pipeline 8, temperature monitoring instrument 9, process gas circulation heat exchanger 12(this process gas circulation heat exchanger 12 of this stage in pipeline), pipeline 13, temperature monitoring instrument 14, expansion joint 15 electric heater 16 that arrives compensation heating carries out after electric heating, the one-level cylinder 23, the secondary cylinder 24 that enter normal temperature compressed unit through pipeline 17 and temperature monitoring instrument 18 through heat exchange process gas after treatment compress, ensure that compressor bank normally opens machine, complete compressor and normally open machine flow process.
After compressor is opened, when hot-gas temperature after overcompression reaches setting value, the second pneumatic valve 4 is closed, the first pneumatic valve 6 is opened, come from the process gas of low temperature air inlet pipeline 1 after prefilter 2 filters, through expansion joint 3, the first pneumatic valve 6, process gas pipeline 8 and temperature monitoring instrument 9 enter process gas circulation heat exchanger 12, now, come from the exchange heat that the second entrance that the high-temperature technology gas of the final stage exhaust knock out drum of compressor bank enters circulation heat exchanger 12 through final stage temperature monitoring instrument 20 and final stage gas exhaust piping 19 carries out cold conditions process gas and hot process gas, cold conditions process gas through intensification after through pipeline 13, temperature monitoring instrument 14, expansion joint 15, electric heater 16, pipeline 17 and temperature monitoring instrument 18 enter normal temperature compressed unit, guarantee compressor bank is normally moved, through process gas circulation heat exchanger, 12 coolings enter outer defeated pipe network through pipeline 11, outlet one-way valve 21 and cut-off valve 22 after processing to hot process gas.
The present invention is by the exchange of compressed media cold and hot energy, the deep cooling medium of guarantee after process gas circulation heat exchanger 12 heats up can enter normal temperature compressed unit and compress, ensure does not provide under the prerequisite of other energy in Compressor Group final stage simultaneously, and the high temperature media after multistage compression can meet the temperature requirement that enters outer defeated pipe network.
Embodiment 2:
Under the effect of this heat-exchange system, if deep cooling medium supercharging is less demanding, one-level compression can complete, do not need to increase energy consumption and just can pass through the normal temperature compressed outer defeated requirement that reaches, if it is high that supercharging requires, need multistage compression, also can adopt two groups of process gas circulation heat exchangers to carry out the heat exchange (as shown in Figure 2) of final stage and middle certain one-level according to actual conditions, can under the prerequisite that increases a small amount of energy consumption, pass through the normal temperature compressed outer defeated requirement that reaches.Structure in the present embodiment and embodiment's 1 structure is basic identical, difference is: described process gas circulation heat exchanger is two, be the first process gas circulation heat exchanger 26 and the second process gas circulation heat exchanger 12, both are parallel with one another, established technology gas pipeline 8 is connected with the first entrance of the first process gas circulation heat exchanger 26 and the second process gas circulation heat exchanger 12 respectively, the first outlet of the first process gas circulation heat exchanger 26 and the second process gas circulation heat exchanger 12 is connected with the entrance of electric heater 16 with pipeline 13 by pipeline 29 respectively, on pipeline 29, be provided with temperature monitoring instrument 30.Described compressor is at least two stage compression (the present embodiment describes as an example of two-stage compression example), the outlet of electric heater 16 is connected with the entrance of compressor by pipeline 17, the outlet of the one-level exhaust knock out drum 23 of described compressor is connected with the second entrance of the first process gas circulation heat exchanger 26 by pipeline 28, the second outlet of the first process gas circulation heat exchanger 26 is connected with the entrance of compressor secondary air inlet knock out drum by pipeline 27, the outlet of the secondary exhaust knock out drum of described compressor is connected with the second entrance of the second process gas circulation heat exchanger 12 by final stage pipeline 19, the second outlet of described the second process gas circulation heat exchanger 12 is connected with outer defeated pipe network by pipeline 11.
The working procedure of the present embodiment is: the process gas that comes from low temperature air inlet pipeline 1 after prefilter 2 filters, through expansion joint 3 and the second pneumatic valve 4(now the first pneumatic valve 6 in closed condition) enter empty bath formula heater 7 and carry out initial temperature rise.After initially heating process gas through process gas pipeline 8, temperature monitoring instrument 9, the second process gas circulation heat exchanger 12 or/and the functional equivalent of this stage second process gas circulation heat exchanger 12 of the first process gas circulation heat exchanger 26(and the first process gas circulation heat exchanger 26 in pipeline), pipeline 13, temperature monitoring instrument 14, the electric heater 16 that expansion joint 15 arrives compensation heating carries out after electric heating, enter normal temperature compressed unit through heat exchange process gas after treatment through pipeline 17 and temperature monitoring instrument 18, ensure that compressor bank normally opens machine, complete compressor and normally open machine flow process.
After compressor is opened, when hot-gas temperature after overcompression reaches setting value, the second pneumatic valve 4 is closed, the first pneumatic valve 6 is opened, come from the process gas of low temperature air inlet pipeline 1 after prefilter 2 filters, through expansion joint 3, the first pneumatic valve 6, process gas pipeline 8 and temperature monitoring instrument 9 enter the first process gas circulation heat exchanger 26, now, the high-temperature technology gas that comes from the one-level exhaust knock out drum of compressor bank enters the first process gas circulation heat exchanger 26 and carries out the exchange heat of cold conditions process gas and hot process gas through pipeline 28, cold conditions process gas through intensification after through pipeline 29, temperature monitoring instrument 30, electric heater 16, the one-level compression cylinder that pipeline 17 and temperature monitoring instrument 18 continue to enter normal temperature compressed unit compresses, guarantee compressor bank is normally moved, hot process gas after the first process gas circulation heat exchanger 26 cooling is processed, enter Compressor Group secondary air inlet knock out drum entrance, process gas after compression enters the second circulation heat exchanger 12 and carries out the exchange heat of cold conditions process gas and hot process gas from the outlet out of secondary exhaust knock out drum through final stage temperature monitoring instrument 20 and final stage gas exhaust piping 19, cold conditions process gas through intensification after through pipeline 13, temperature monitoring instrument 14, expansion joint 15, electric heater 16, pipeline 17 and temperature monitoring instrument 18 enter normal temperature compressed unit, guarantee compressor bank is normally moved, through process gas circulation heat exchanger, 12 coolings enter outer defeated pipe network after processing to hot process gas.
Claims (4)
1. one kind is utilized the heat-exchange system of normal temperature compressed machine compression deep cooling medium, it is characterized in that: it comprises low temperature air inlet pipeline, empty bath formula heat exchanger, process gas circulation heat exchanger, electric heater, Compressor Group, after being connected with initial filtrator, described low temperature air inlet pipeline is divided into two-way, first valve of leading up to is connected with process gas pipeline, separately lead up to after the second valve is connected with empty bath formula heat exchanger and be connected with process gas pipeline again, described process gas pipeline is connected with the first entrance of process gas circulation heat exchanger, the first outlet of process gas circulation heat exchanger is connected with the entrance of electric heater, the outlet of electric heater is connected with suction port of compressor, the outlet of described final compressor exhaust knock out drum is connected with the second entrance of process gas circulation heat exchanger by final stage pipeline, the second outlet of process gas circulation heat exchanger is connected with outer defeated pipe network.
2. a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium according to claim 1, it is characterized in that: described process gas circulation heat exchanger is two, be the first process gas circulation heat exchanger and the second process gas circulation heat exchanger, both are parallel with one another, described compressor bank is two stage compression at least, the outlet of the wherein one-level exhaust knock out drum of described compressor is connected with the second entrance of the first process gas circulation heat exchanger, the second outlet of the first process gas circulation heat exchanger is connected with the entrance of compressor next stage air inlet knock out drum, the outlet of the final stage knock out drum of described compressor is connected with the second entrance of the second process gas circulation heat exchanger, the second outlet of described the second process gas circulation heat exchanger is connected with outer defeated pipe network.
3. a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium according to claim 1 and 2, is characterized in that: the first valve and the second valve are pneumatic valve.
4. a kind of heat-exchange system that utilizes normal temperature compressed machine compression deep cooling medium according to claim 1 and 2, is characterized in that: on the outlet port of the ingress of process gas circulation heat exchanger, outlet port, heater, final stage pipeline, be provided with temperature monitoring instrument.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713310A (en) * | 2015-03-11 | 2015-06-17 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling control method |
| CN104819379A (en) * | 2015-04-21 | 2015-08-05 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery control method |
| CN104832781A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832783A (en) * | 2015-04-21 | 2015-08-12 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery method |
| CN104832782A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832785A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104832780A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104948907A (en) * | 2015-07-02 | 2015-09-30 | 新奥气化采煤有限公司 | Compressed methane gas recycling system and recycling method |
| CN104976503A (en) * | 2015-06-04 | 2015-10-14 | 新奥气化采煤有限公司 | Methane recovery system and recovery method |
| CN105003822A (en) * | 2015-07-02 | 2015-10-28 | 新奥气化采煤有限公司 | Recovery system and recovery method of compressed methane gas |
| CN105042327A (en) * | 2015-07-02 | 2015-11-11 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling method |
| CN105042324A (en) * | 2015-06-04 | 2015-11-11 | 新奥气化采煤有限公司 | Methane recycling control system and method |
| CN105840981A (en) * | 2016-04-14 | 2016-08-10 | 新奥科技发展有限公司 | Methane recovery system and recovery method |
| CN112304144A (en) * | 2020-11-17 | 2021-02-02 | 无锡特莱姆气体设备有限公司 | Anti-deflection liquid collecting distribution pipe structure of cryogenic medium heat exchanger |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104713310B (en) * | 2015-03-11 | 2018-01-12 | 新奥科技发展有限公司 | Methane gas recovery system and recycling and control method |
| CN104713310A (en) * | 2015-03-11 | 2015-06-17 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling control method |
| CN104819379A (en) * | 2015-04-21 | 2015-08-05 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery control method |
| CN104832783A (en) * | 2015-04-21 | 2015-08-12 | 新奥气化采煤有限公司 | Methane gas recovery system and recovery method |
| CN104819379B (en) * | 2015-04-21 | 2017-11-07 | 新奥科技发展有限公司 | Methane gas recovery system and recycling and control method |
| CN104832785B (en) * | 2015-05-21 | 2017-08-01 | 新奥科技发展有限公司 | Compressed methane recovery system and recovery method |
| CN104832781A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832782A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery control system and method |
| CN104832785A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104832780A (en) * | 2015-05-21 | 2015-08-12 | 新奥气化采煤有限公司 | Compressed methane gas recovery system and method |
| CN104832782B (en) * | 2015-05-21 | 2017-09-19 | 新奥科技发展有限公司 | Compressed methane recovery control system and recovery control method |
| CN104976503A (en) * | 2015-06-04 | 2015-10-14 | 新奥气化采煤有限公司 | Methane recovery system and recovery method |
| CN105042324A (en) * | 2015-06-04 | 2015-11-11 | 新奥气化采煤有限公司 | Methane recycling control system and method |
| CN105042327A (en) * | 2015-07-02 | 2015-11-11 | 新奥气化采煤有限公司 | Methane gas recycling system and recycling method |
| CN105003822A (en) * | 2015-07-02 | 2015-10-28 | 新奥气化采煤有限公司 | Recovery system and recovery method of compressed methane gas |
| CN104948907A (en) * | 2015-07-02 | 2015-09-30 | 新奥气化采煤有限公司 | Compressed methane gas recycling system and recycling method |
| CN105840981A (en) * | 2016-04-14 | 2016-08-10 | 新奥科技发展有限公司 | Methane recovery system and recovery method |
| CN112304144A (en) * | 2020-11-17 | 2021-02-02 | 无锡特莱姆气体设备有限公司 | Anti-deflection liquid collecting distribution pipe structure of cryogenic medium heat exchanger |
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Application publication date: 20141112 |