CN203685396U - Energy-saving system capable of utilizing cooling capacity generated by depressurization of natural gas of fuel gas power plant - Google Patents
Energy-saving system capable of utilizing cooling capacity generated by depressurization of natural gas of fuel gas power plant Download PDFInfo
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- CN203685396U CN203685396U CN201420007285.7U CN201420007285U CN203685396U CN 203685396 U CN203685396 U CN 203685396U CN 201420007285 U CN201420007285 U CN 201420007285U CN 203685396 U CN203685396 U CN 203685396U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000003345 natural gas Substances 0.000 title claims abstract description 21
- 238000001816 cooling Methods 0.000 title abstract description 6
- 239000002737 fuel gas Substances 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000007789 gas Substances 0.000 claims description 53
- 239000011435 rock Substances 0.000 claims description 51
- 238000002485 combustion reaction Methods 0.000 claims description 37
- 230000008676 import Effects 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses an energy-saving system capable of utilizing cooling capacity generated by depressurization of natural gas of a fuel gas power plant. The system improves the thermal efficiency of the fuel gas power plant by fully utilizing the conversion between the cooling capacity caused by the depressurization of natural gas and the heat of rotating equipment. The system disclosed by the utility model comprises a closed cooler, a closed cooler water supply pipeline, a closed cooler water return pipeline and a natural gas pipeline, wherein the outlet of the closed cooler is connected with the closed cooler water supply pipeline; the inlet of the closed cooler is connected with the closed cooler water return pipeline. The energy-saving system is characterized in that one end of a first pipeline is connected with the outlet of a water bath furnace, and the other end of the first pipeline is connected with the inlet of a heat exchanger; one end of a second pipeline is connected with the closed cooler water return pipeline, and the other end of the second pipeline is connected with the inlet of the heat exchanger; one end of a third pipeline is connected with the heat exchanger, and the other end of the third pipeline is connected with the closed cooler water supply pipeline; one end of a fourth pipeline is connected with the outlet of the heat exchanger, and the other end of the fourth pipeline is connected with the inlet of the water bath furnace.
Description
Technical field
The utility model relates to a kind of energy conserving system that fires dynamo-electric factory and utilize rock gas step-down cold, is specifically related to a kind of energy conserving system that utilizes the cold that the rock gas step-down of the dynamo-electric factory of combustion produces, and the utility model belongs to the dynamo-electric factory of combustion heat-exchange system design field.
Background technique
Rock gas, from the preposition module of outer part defeated station access combustion machine, need reduce pressure, the decline that decompression can bring temperature.The simultaneously requirement in order to meet the operation of combustion machine and to improve combustion engine efficiency, rock gas needs to heat to improve temperature entering before burner, generally adopts the modes such as water-bath stove heating, provides heating heat by outside.Change angle, can think the such concept of cold that rock gas has.
In combustion machine Controlling Auxiliaries in Power Plants equipment, need mainly to comprise combustion machine and steam-turbine lubrication oil cooler, the hydrogen-cooled device of generator, feed water pump cooler, air compressor etc. with closed water cooler (abbreviation closed cold device), these equipment, at run duration meeting distribute heat, need cooling medium that heat is taken away.
In the dynamo-electric factory of conventional combustion, be provided with respectively independently closed cooling water system and heated by natural gas system, fail to make full use of the heat of rotating machinery and the cold of rock gas.
Model utility content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of energy conserving system that fires dynamo-electric factory and utilize rock gas step-down cold.
In order to realize above-mentioned target, the utility model adopts following technological scheme:
Fire the energy conserving system that dynamo-electric factory utilizes rock gas step-down cold, comprise closed cold device, closed cold device water supply line, closed cold device water return pipeline, natural gas line, the outlet of described closed cold device connects closed cold device water supply line, the import of described closed cold device connects closed cold device water return pipeline, it is characterized in that, also comprise: be arranged on heat exchanger, the first pipeline, second pipe, the 3rd pipeline, the 4th pipeline on natural gas line, one end of described the first pipeline connects the outlet of water-bath stove, and the other end of described the first pipeline connects the import of heat exchanger; One end of described second pipe is connected on closed cold device water return pipeline, and the other end of described second pipe connects the import of heat exchanger; One end of described the 3rd pipeline connects heat exchanger, and one end of described the 3rd pipeline connects the outlet of heat exchanger, and the other end of described the 3rd pipeline is connected on closed cold device water supply line; One end of described the 4th pipeline connects the outlet of heat exchanger, and the other end of described the 4th pipeline connects the import of water-bath stove.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, on described closed cold device water supply line, is provided with the first valve, and described the first valve is arranged between the 3rd one end of pipeline and the outlet of closed cold device.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, be disposed with the second valve, the 3rd valve, enclosed pump along described closed cold device water return pipeline, described the second valve is arranged between the import of closed cold device and one end of second pipe, and one end of described second pipe is arranged between the second valve of closed cold device water return pipeline and the 3rd valve, enclosed pump.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, is provided with the 4th valve on described the first pipeline.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, is provided with the 5th valve on described second pipe.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, on described the 3rd pipeline, is provided with the 6th valve.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, also comprise the 5th pipeline, the two ends of described the 5th pipeline are all connected on the 3rd pipeline, described the 6th valve is arranged between the two ends of the 5th pipeline, on described the 5th pipeline, is provided with the 7th valve.
The dynamo-electric factory of aforesaid combustion utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, on described the 4th pipeline, is provided with the 8th valve.
Usefulness of the present utility model is: the dynamo-electric factory of combustion of the present utility model utilizes the energy conserving system of rock gas step-down cold can make full use of the heat of rotating machinery and the cold of rock gas, can be according to the actual demand of the hot and cold amount of electric power factory equipment, calculate correlative coupling amount, realize the reasonable transfer of the dynamo-electric factory of combustion self-energy, improve the thermal efficiency of the dynamo-electric factory of combustion.
Accompanying drawing explanation
Fig. 1 is a structural representation of preferably implementing of the present utility model.
The implication of reference character in figure:
1, closed cold device, 2, closed cold device water supply line, 3, closed cold device water return pipeline, 4, the outlet of closed cold device, 5, the import of closed cold device, 6, heat exchanger, 7, the first pipeline, 8, second pipe, 9, the 3rd pipeline, 10, the 4th pipeline, 11, the import of heat exchanger, 12, the outlet of heat exchanger, 13, the first valve, 14, the second valve, 15, the 3rd valve, 16, enclosed pump, 17, the 4th valve, 18, the 5th valve, 19, the 6th valve, 20, the 5th pipeline, 21, the 7th valve, 22, the 8th valve, 23, natural gas line.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is done to concrete introduction.
Shown in Fig. 1, the utility model fires dynamo-electric factory and utilizes the energy conserving system of rock gas step-down cold, comprise closed cold device, closed cold device water supply line, closed cold device water return pipeline, natural gas line, the outlet of closed cold device connects closed cold device water supply line, the import of closed cold device connects closed cold device water return pipeline, it is characterized in that, also comprise: be arranged on heat exchanger, the first pipeline, second pipe, the 3rd pipeline, the 4th pipeline on natural gas line, one end of the first pipeline connects the outlet of water-bath stove, and the other end of the first pipeline connects the import of heat exchanger; One end of second pipe is connected on closed cold device water return pipeline, and the other end of second pipe connects the import of heat exchanger; One end of the 3rd pipeline connects heat exchanger, and one end of the 3rd pipeline connects the outlet of heat exchanger, and the other end of the 3rd pipeline is connected on closed cold device water supply line; One end of the 4th pipeline connects the outlet of heat exchanger, and the other end of the 4th pipeline connects the import of water-bath stove.When actual motion, closed cold device provides cold water by the outlet of closed cold device to closed cold device water supply line, then closed cold device water supply line provides cold water cooling to combustion machine and steam-turbine lubrication oil cooler, the hydrogen-cooled device of generator, feed water pump cooler, air compressor etc., then the cold water in closed cold device water supply line has just absorbed the heat that combustion machine and steam-turbine lubrication oil cooler, the hydrogen-cooled device of generator, feed water pump cooler, air compressor etc. produce, and becomes hot water and returns closed cold device by closed cold device water return pipeline through closed cold device import.This is the working procedure of existing closed cooling water system.In addition, aspect natural gas line, hot water is discharged in the outlet of water-bath stove, transmits heat in hot water to rock gas after the import of the first pipeline, heat exchanger, natural gas temperature is raise, and hot water just becomes cold water and through the import of the 4th pipeline, water-bath stove and return water liquid furnace.This is the structure of existing heated by natural gas system.Innovation of the present utility model is, hot water in closed cold device water return pipeline is passed to rock gas by second pipe, heat exchanger, rock gas is heated up, like this, heat in hot water in closed cold device water return pipeline has just passed to rock gas, and the cold of rock gas is also got back in closed cold device water supply line by outlet, the 3rd pipeline of heat exchanger simultaneously, now the 3rd ducted water is cold water, its cold is provided by rock gas, cold is provided can to combustion machine and steam-turbine lubrication oil cooler, the hydrogen-cooled device of generator, feed water pump cooler, air compressor etc.Thus, the dynamo-electric factory of combustion of the present utility model utilizes the energy conserving system of rock gas step-down cold can make full use of the heat of rotating machinery and the cold of rock gas, can be according to the actual demand of the hot and cold amount of electric power factory equipment, calculate correlative coupling amount, realize the reasonable transfer of the dynamo-electric factory of combustion self-energy, improve the thermal efficiency of the dynamo-electric factory of combustion.
Further, in order to make the utility model automation more, be provided with the first valve to control the water output of closed cold device water supply line on closed cold device water supply line, the first valve is arranged between the 3rd one end of pipeline and the outlet of closed cold device; Along closed cold device water return pipeline set gradually be useful on control the second valve of the water yield of getting back to closed cold device, for controlling the hot water amount's who takes back from combustion machine and steam-turbine lubrication oil cooler, the hydrogen-cooled device of generator, feed water pump cooler, air compressor etc. the 3rd valve and enclosed pump, the second valve is arranged between the import of closed cold device and one end of second pipe, and one end of second pipe is arranged between the second valve of closed cold device water return pipeline and the 3rd valve, enclosed pump; On the first pipeline, be provided with the 4th valve for controlling the hot water amount who obtains from water-bath stove; On second pipe, be provided with the 5th valve for controlling the water yield of obtaining from closed cold device water return pipeline; On the 3rd pipeline, be provided with the 6th valve that the cool water quantity providing to closed cold device water supply line is provided; Also comprise the 5th pipeline, the two ends of the 5th pipeline are all connected on the 3rd pipeline, the 6th valve is arranged between the two ends of the 5th pipeline, on the 5th pipeline, be provided with the 7th valve, the 5th pipeline and the 6th pipeline, for cooperatively interacting with the 6th valve, make it possible to more effectively control the cool water quantity providing to closed cold device water supply line; On the 4th pipeline, be provided with the 8th valve for return cold water to water-bath stove.
Below, take the power plant of Liang Tao Siemens F level combustion machine as example, calculate each typical case's operating mode in season and divide into the standby hot and cold thermal data of changing, calculate correlative coupling amount, the additional project when proposing the two and not mating.
Rock gas side:
The power plant of firing machine take Liang Tao Siemens F level is as example, and its combustion machine is 15～50 ℃ for the temperature requirement of rock gas, and need be higher than 28 ℃ of gas dew points.Be the power plant of transfering natural gas from the west to the east pipeline for fuel, a point defeated station receives that atmospheric pressure maintains 6MPa left and right throughout the year, and approximately 10～15 ℃ of temperature, through being decompressed to the about 4MPa of voltage regulating station of power plant place's pressure, approximately 0～5 ℃ of temperature, approximately-10 ℃ of gas dew points.Carry out rock gas situation according to a point defeated station, finally firing machine entrance natural gas temperature scope should be between 18～50 ℃.
Because entering factory's natural gas temperature and flow with slightly changing season, according to above analysis, calculate respectively the available cold related data of rock gas as following table one:
Table one: the available cold of rock gas
Enclosed water side:
In subsidiary engine equipment, need cooling combustion machine and steam-turbine lubrication oil cooler, the hydrogen-cooled device of generator, feed water pump cooler, the air compressor etc. of mainly comprising, these equipment can distribute heat at run duration, needs cooling medium that heat is taken away.The apparatus cools water yield statistics of firing the power plant of machine with Liang Tao Siemens F level refers to following table two.
Table two: the apparatus cools water yield of the power plant of Liang Tao Siemens F level combustion machine
Calculate heat that cooling water side need take away in same point of season as following table three:
Table three: the heat that the cooling water side calculating point season need be taken away
Below according to the working condition of calculating heat exchanger season, successively as shown in following table four, table five, table six:
Table four: heat exchanger operating mode in spring
Table five: heat exchanger summer condition
Table six: heat exchanger operating mode in autumn
Can tentatively draw to draw a conclusion from above computational chart:
1, within power plant most of working time (enclosed coolant-temperature gage is higher than 22 ℃):
For rock gas: the heat that enclosed water can provide is much larger than the required heat of heated by natural gas, only need to introduce approximately 20% enclosed water and can meet the requirement of heated by natural gas;
For enclosed water: the cold that rock gas can provide is less than the heat that enclosed water side need be taken away, and other heats need still adopt outer loop water to take away.
2, at enclosed coolant-temperature gage during lower than 22 ℃
After considering that the heat transmission equipment end of 5 ℃ of left and right is poor, in the winter time time enclosed shipwreck with by heated by natural gas to required temperature.Now should consider to adopt water-bath stove etc. as heat source, to replace enclosed water heating rock gas.
At enclosed coolant-temperature gage during higher than 22 ℃, replace water-bath stove heating rock gas with enclosed water, (water-bath stove power is pressed 2000kW to the rock gas consumption of calculated savings, rock gas low heat valve 33812kJ/m3 as follows, 3.3 yuan/m3 of rock gas unit price, annual hours run calculates for 2000 hours):
Rock gas consumption=water-bath stove power/rock gas low heat valve × 3600=213m3/h
Ten thousand yuan of fuel saving cost=rock gas consumption × rock gas unit price=140.5
Meanwhile, due to the minimizing of the cooling enclosed water yield of need, the outer loop water yield is corresponding also can be reduced, and the benefit of this part also can increase to some extent.
More than show and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technological scheme that the mode of equivalent transformation obtains, all drops in protection domain of the present utility model.
Claims (8)
1. the dynamo-electric factory of combustion utilizes the energy conserving system of rock gas step-down cold, comprise closed cold device, closed cold device water supply line, closed cold device water return pipeline, natural gas line, the outlet of described closed cold device connects closed cold device water supply line, the import of described closed cold device connects closed cold device water return pipeline, it is characterized in that, also comprise: be arranged on heat exchanger, the first pipeline, second pipe, the 3rd pipeline, the 4th pipeline on natural gas line, one end of described the first pipeline connects the outlet of water-bath stove, and the other end of described the first pipeline connects the import of heat exchanger; One end of described second pipe is connected on closed cold device water return pipeline, and the other end of described second pipe connects the import of heat exchanger; One end of described the 3rd pipeline connects heat exchanger, and one end of described the 3rd pipeline connects the outlet of heat exchanger, and the other end of described the 3rd pipeline is connected on closed cold device water supply line; One end of described the 4th pipeline connects the outlet of heat exchanger, and the other end of described the 4th pipeline connects the import of water-bath stove.
2. the dynamo-electric factory of combustion according to claim 1 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, on described closed cold device water supply line, is provided with the first valve, and described the first valve is arranged between the 3rd one end of pipeline and the outlet of closed cold device.
3. the dynamo-electric factory of combustion according to claim 2 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, be disposed with the second valve, the 3rd valve, enclosed pump along described closed cold device water return pipeline, described the second valve is arranged between the import of closed cold device and one end of second pipe, and one end of described second pipe is arranged between the second valve of closed cold device water return pipeline and the 3rd valve, enclosed pump.
4. the dynamo-electric factory of combustion according to claim 3 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, is provided with the 4th valve on described the first pipeline.
5. the dynamo-electric factory of combustion according to claim 4 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, is provided with the 5th valve on described second pipe.
6. the dynamo-electric factory of combustion according to claim 5 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, on described the 3rd pipeline, is provided with the 6th valve.
7. the dynamo-electric factory of combustion according to claim 6 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, also comprise the 5th pipeline, the two ends of described the 5th pipeline are all connected on the 3rd pipeline, described the 6th valve is arranged between the two ends of the 5th pipeline, on described the 5th pipeline, is provided with the 7th valve.
8. the dynamo-electric factory of combustion according to claim 7 utilizes the energy conserving system of rock gas step-down cold, it is characterized in that, on described the 4th pipeline, is provided with the 8th valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007285.7U CN203685396U (en) | 2014-01-07 | 2014-01-07 | Energy-saving system capable of utilizing cooling capacity generated by depressurization of natural gas of fuel gas power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420007285.7U CN203685396U (en) | 2014-01-07 | 2014-01-07 | Energy-saving system capable of utilizing cooling capacity generated by depressurization of natural gas of fuel gas power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742269A (en) * | 2014-01-07 | 2014-04-23 | 江苏省电力设计院 | Energy-saving system for using natural gas depressurization cold energy in fuel gas power plant |
| CN118794140A (en) * | 2024-09-13 | 2024-10-18 | 瑞星久宇燃气设备（成都）有限公司 | Heater for natural gas power plant |
-
2014
- 2014-01-07 CN CN201420007285.7U patent/CN203685396U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742269A (en) * | 2014-01-07 | 2014-04-23 | 江苏省电力设计院 | Energy-saving system for using natural gas depressurization cold energy in fuel gas power plant |
| CN103742269B (en) * | 2014-01-07 | 2017-02-08 | 中国能源建设集团江苏省电力设计院有限公司 | Energy-saving system for using natural gas depressurization cold energy in fuel gas power plant |
| CN118794140A (en) * | 2024-09-13 | 2024-10-18 | 瑞星久宇燃气设备（成都）有限公司 | Heater for natural gas power plant |
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| CP02 | Change in the address of a patent holder |
Address after: 210009 Gulou District, Jiangsu, Nanjing new model road, No. 5 Patentee after: Jiangsu Electric Power Designing Institute Address before: 211100, No. 58-3, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee before: Jiangsu Electric Power Designing Institute |
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Owner name: CHINA ENERGY ENGINEERING GROUP JIANGSU ELECTRIC PO Free format text: FORMER NAME: JIANGSU ELECTRIC POWER DESIGNING INST. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 210009 Gulou District, Jiangsu, Nanjing new model road, No. 5 Patentee after: Chinese energy construction group Jiangsu Prov. Power Design Inst Co., Ltd Address before: 210009 Gulou District, Jiangsu, Nanjing new model road, No. 5 Patentee before: Jiangsu Electric Power Designing Institute |