Editor's note: In recent years, China's annual industrial production value of rising, but energy consumption has more than high, high energy consumption has become more than restricting China's economic development bottleneck, for which the state invested a lot of money to support energy saving projects. Frequency of high pressure technology which has become increasingly widely used in all walks of life, not only can improve the process, extend the useful life of equipment to improve efficiency and so on, the most important thing is that it can be "energy saving" and that it is Recognized by the majority of users, and deeply concerned.
leader Hua Fuzhou company specializing in high-pressure Frequency Control System research and development, production, marketing, services have up to six years, has been selling 245 sets of high-voltage inverter, and put into operation more than 150 sets, used in electric power, metallurgy, municipal , Petrochemicals, cement, coal, pipeline transportation and other industries, and its advanced technology, reliable performance and quality services for the majority of the users of substantial revenue. At the same time, we hope that in our country "energy saving" technology to make more contributions. Therefore, in order to enable more people to understand high-pressure Frequency Control Technology "energy saving" a significant effect, we have summed up the typical number of energy-saving cases, to discuss with you, so that we can have a more specific understanding, and hope Members of help.
1. Daye Special Steel steelworks in the fourth
inverter models: HARSVERT-A06/210
inverter parameters: 1600KW/6KV
load applications: dust fan
application of places: 8 electric furnace steel-making system, dust
brief:
Daye Special Steel steelworks in the fourth on the 8th for the expansion of the electric arc furnace 70t exchange. Steel-making process in accordance with the requirements of a steel-making cycle in six different needs of air flow. Transformation of the former, no matter what kind of furnace in the operational phase, the dust fans are running at full speed, air flow by opening tailgate-conditioning, low efficiency, energy losses. The use of frequency control, in accordance with the requirements of steel-making process at different stages of the inverter used to control the air flow in the steel-making process of automatic switching regulation has greatly enhanced the efficiency of fans. Since August 2003 has been put into operation, reliability, to meet the expected energy-saving effect. After the user statistics, dust removal system in the post-transformation frequency than before the reform, the steel dust reduced power consumption 17.39KW.h, in power-saving rate of 58.63 percent, the user has one year to recover the full cost of the investment.
2. Fujian three Steel (Group) Co., Ltd.
inverter models: HARSVERT-A06/080
inverter parameters: 630KW/6KV
load applications: dust fan
application of places: # 4 converter dust removal system
brief:
Fujian three Steel (Group) Co., three of the original dust removal system using hydraulic fan coupler for governor, but because of the existence of hydraulic coupler narrow range of speed, precision regulation of low response to the slow, low-speed operation When inefficient and often need to shutdown the replacement of bearings and other issues in the new # 4 on the converter dust removal system design, selected high-voltage converter for the converter for fan speed control. Actual use of low-speed high-speed run two respectively, in accordance with the requirements of automatic switching technology. Inverter operation, the converter and the original three-speed hydraulic coupling, stable, safe and reliable; start no impact on system greatly reduced noise; energy-saving effect of significantly reducing power consumption of steel. According to the statistics of electricity users, electricity 1,980,000 New Year, local price 0.51 yuan terms, electricity savings of about 1,000,000 yuan.
3. Hainan Yangpu Power Company Limited
inverter models: HARSVERT-A06/115
inverter parameters: 1120KW/6KV
Application Load: to pump
application of places: # 11 boiler feed water system
brief:
Hainan Yangpu Power Co., Ltd. # 11 in the gas turbine in September 2003 to complete the oil gas production technology for power generation, China has become the first to use natural gas as fuel for heavy-duty gas turbines. With matching # 11-13 combined cycle unit is currently the largest natural gas combined cycle unit, the actual maximum output of up to 220MW. The unit's high-pressure water supply system is mainly to the two high-pressure pumps, water supply pneumatic valve and related valve / pipe component.
because of the design did not take full account of the special operation unit, resulting in high-pressure pump to the export of high pressure, high pressure and there is tremendous pressure on the drum pressure, vibration generated, plus the water supply pipeline to support the platform where the difference STIFFNESS own, not vibration To absorb, so that the link generated a high degree of fatigue in the final impact load when the yield reached the limit and fracture. Once the link loose or broken, the valve automatically return to the wide-open position, the maximum water flow so that high-pressure water level rose rapidly and at the same time reduce the high-pressure water pressure suddenly, causing back-up pump chain started, the staff, such as Failure to take timely measures to the inevitable emergence of high-pressure water level three high-value action to protect the turbine jump. Therefore, the Yangpu Power Plant to choose high-Frequency Control to address the issue.
through 2 months of operation compared with statistical analysis, the use of Frequency Control, the reliability of the combined cycle has been significantly improved, increased availability of Turbine, the Hainan power grid's safe and stable operation resulted in a beneficial effect. Power consumption and a marked decline, combined-cycle 24-hour operation, the plant with a daily electricity than previously reduced by about 15,000, an annual reduction of about 5,470,000, according to the local electricity price 0.36 yuan / degrees per year A reduction in electricity consumption of about 1,969,200 yuan. After computing, energy-saving rate of 60%, with significant energy-saving effect. Finally, the Yangpu Power Plant concluded: "This technology has significant economic and social benefits, this technology has been very successful."
4. Beijing Datang Power Generation Inc. power plant Douhe
inverter models: HARSVERT-A06/130
inverter parameters: 1000KW/6KV
load application: Fan
application of places: # 2 generating unit
brief:
Douhe # 2 power plant units (125MW) for peak shaving unit, Run-time units with 70-80% of the load, use two suction fan guard the entrance conditioning, full capacity when the tailgate opening 60%; peaking unit, the opening is only about 40%, loss of energy, Fans of low efficiency. Use of frequency regulation, stable, easy-conditioning, energy-saving effect of significantly. Chinese Academy of Sciences after the power to conduct on-site testing, the results showed that the unit running at full capacity in the energy-saving rate of 46%, 72% of the load in the run-time energy-saving rate of 57% of the annual electricity savings of 100 million.
5. Shanxi Power Generation Co., Ltd. sun
inverter models: HARSVERT-A06/130
inverter parameters: 1000KW/6KV
application load: condensation pump
application of places: # 1 - # 4 generating units
brief:
Shanxi Sunshine electricity generation units of limited liability company for 4 300,000 kilowatt generating units. The condensation of water for power 1000KW. 1000KW four were used to control inverter 1A, 2A, 3A, 4A condensate pump. Four inverter has been put into operation, running very stable, very low failure rate, to ensure the normal operation of the unit. Significant energy-saving effect, the results of statistical data put into operation so that the power plant rate fell by 0.25 percent each year for electricity is expected to save 12,000,000, a reduction in electricity consumption in about 1,800,000 yuan.
6. Lanzhouxigu power plant
inverter models: HARSVERT-A06/090
power converter: 710KW/6KV
application load: circulation pump
application of places: # 1, # 3 recycling pump
brief:
Lanzhouxigu power plant's water recycling plant is recycled water system in an important device for natural ventilation cooling tower water supply. As a result of the use of axial flow pump-conditioning is very difficult, requiring frequent start and stop pumps, to the normal production has brought about tremendous inconvenience caused by the recycled water at the same time, the enormous waste of coal. As a result, management decided to delay the second system Inverter one for # 1, # 3 of circulating water pump speed control. The use of frequency control, a reasonable allocation of recycling through the use of pumps and pressure on the use of closed-loop control, effectively prevent the loss of a large number of circulating water at the same time increases the circulation of the water cycle rate, increased the average vacuum, reducing coal consumption, to ensure that the Units of the economy. By the power plant accurate statistics, the annual water-saving, energy-saving and reduce the total number of coal consumption, in order to 7,137,600 yuan. In fact, the user only three months, they have been taken down converter investment costs. This reconstruction project due to a significant economic effect, was that year in Gansu Province and the second prize to promote scientific and technological achievements, the company first prize for scientific and technological progress.
7. Xu Tong, Jiangsu Power Co., Ltd.
inverter models: HARSVERT-A06/130
inverter parameters: 1000KW/6KV
application load: condensation pump
application of places: # 5 condensation unit water system
brief:
Xu Tong, Jiangsu Power Co., Ltd. of 300,000 kilowatt generating units for units of its two electric pumps 1000KW condensation using a company delayed the second system Inverter control. Normal, the frequency converter drag a condensation water pump running, another stand-by power frequency; transducer failures, the automatic back-up water condensation into operation frequency. Inverter has been put into operation, to overcome the original frequency regulating valve under way cut losses, exports of high pressure, serious damage control, and often leaked and so on, vibration, noise reduced and the current start small, energy-saving effect of a considerable Considerable. After users come to power after the statistics: an annual generation capacity of generating units to 1,500,000,000 kwh basis, the use of frequency converter plant can save 3,300,000 kwh of electricity, equivalent to about RMB 1,000,000 yuan.
8. Daqing Oilfield get water bubbles coming
inverter models: HARSVERT-A10/110
inverter parameters: 1400KW/10KV
load application: check pump
application of places: Daqing get water bubbles coming
brief:
Daqing Oilfield get water bubbles coming on the design of the water capacity of 500,000 cubic meters / day, with the limit of oil production, the net amount of water outside the gradual decline in the quantity of water that only 25-30 million cubic meters / day. Frequency transformation before export of water control valves, valve head loss, the failure rate of the pump, a lot of wasted energy. 1400KW will be one of the electric switch to control the inverter, using closed-loop pressure control, electric water pump and the operating conditions also improved, and significantly reduces the power consumption. According to Daqing in the on-site water supply measurement statistics for the New Year 6,040,000 kwh of electricity, according to the local electricity price 0.44 yuan / calculation, the savings in power consumption to 2,680,000 yuan. In fact, customers have 10 months to recover the full cost of investment.
thanks to Daye Special Steel steelworks in the fourth, three in Fujian Steel (Group) Co., Ltd., Hainan Yangpu Power Co. Ltd., Beijing Datang Power Generation Company Douhe Power Plant, Shanxi Sunshine electricity limited liability company Lanzhouxigu power plant Jiangsu Power Xu Tong Co., Ltd., Daqing Oilfield get water bubbles coming to the data provided by users of the strong support expressed heartfelt thanks!
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