How to achieve corrosion-resistant multi-stage pump energy saving has become a top priority, summed up in general there are several ways.
(1) to improve the efficiency of the pump itself, make great efforts in the design and manufacture of the pump, use advanced design and processing methods to manufacture the pump, or adopt advanced technology to realize the utilization efficiency of the pump.
According to reports, there are over 100 domestic manufacturers of petrochemical pumps. In addition to general pumps, chemical process pumps and pumps, in recent years, they have independently developed or imported foreign technologies to develop high-temperature and high-pressure feed pumps for refining and chemical plants, Pumps, cryogenic pumps, shielded pumps and chemical process pumps, to meet the needs of petrochemical production. Product quality has been greatly improved, the specification further increased to meet the domestic petrochemical industry 80% of the needs of petrochemical pumps.
(2) use the inverter to change the pump speed, improve pump operating efficiency. Practice has proved that the frequency control device is the technological transformation of enterprises, energy saving ideal equipment. There is no doubt that this speed control mode will become the backbone of the driving system in the petrochemical industry.
The choice of pumps, mostly based on the needs of full load type selection. In practice, the pump does not work at full capacity most of the time. Centrifugal pump main performance parameters include the flow rate Q, head H, power N and efficiency η.When the speed changes, the approximation by the pump law: n / n1 = Q / Q1, H / H1 = [n / n1] N / N1 = [n / n1] 3 = [Q / Q1]. It can be seen from the above formula that when the pump speed is changed, the flow, lift and power of the pump change. Power and speed is proportional to the cube, when the speed is reduced, the power is greatly reduced. For example, when the motor runs at 80% of the rated speed, the power consumed by the motor is theoretically (80%) 3 of the rated power (51.2%), and the energy saving efficiency is also close to 40% except for the mechanical loss, As the speed and frequency is proportional to energy conversion that is derived from this.
(3) Selection and use of the pump is correct or not, but also determines the true realization of the petrochemical industry energy saving. Production companies have the responsibility to communicate with users to provide a reasonable product model and related services, and users must make good selection of this level, to prevent the previous "big car" such as unnecessary energy consumption.
The pump is the heart of a refinery. The total amount of logistics delivered by the pump during the refining process is about 40 times the amount of crude oil processed, so the power consumption is predictable. In the refinery, the motor is one of the most widely used and the most numerous electrical equipment. Most of its load is the pump, while the constant speed pump is absorbed by the process logistics for only 30% ~ 40%, 60% ~ 70% of the power consumption of the control valve throttling control pressure drop and because of the handling capacity, and design margin caused by the "big horse car" and the resulting pump outlet pressure drop.
Therefore, as the manager and user of the pump, first of all, the pump should be selected reasonably, so that the selection is maximized, that is to say, the components (pumps, motors, various related accessories) Matching is the best, most reasonable, and correctly determine the geometric installation of the pump height, which is to improve the pump operating efficiency key; followed by the appropriate choice of regulation, there are two situations: For the process often change or the pump itself Is set to adjust the process parameters, the pump will be timely adjustments. In the regulation, should try to use variable speed regulation, without throttling regulation. As for the choice of speed control methods, but also specific issues specific analysis. For the process parameters are basically stable, the pump used too large, on-site to take off the valve to regulate the flow, resulting in the pump work flow is much smaller than the rated flow, the pressure is much higher than the rated pressure situation, the use of cutting impeller diameter adjustment more economical.
(4) In the process of pump group operation, energy efficiency can be tapped through attention to detail and dynamic management of vibration detection in tapping the potential and operation of the state can be realized to further control the waste of resources and energy. ENHANCING Onsite Maintenance and Management Any machine needs maintenance and care. There are many examples of lower pump efficiency due to poor site maintenance and mismanagement.
Hunan multi-stage centrifugal pump manufacturers Grace pump, founded in 1994, is one of the main production bases for mining multi-stage pumps in Changsha, Hunan. The company uses horizontal multistage centrifugal pumps, mine self-balancing multi-stage centrifugal pumps , Mine in open centrifugal pumps, boiler feed pumps, mining multi-stage corrosion-resistant centrifugal pumps and other types of centrifugal pumps hundreds of specifications. Products sell well throughout the country, by the power, metallurgy, steel, water conservancy, municipal services, environmental protection, dredging, petroleum, chemical, mining, fire and other users of the industry wide acclaim.
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