How should chemical companies use chemical pumps?

　　Petroleum, chemical industry in the national economy occupies a very important position, chemical process pumps as a key supporting equipment is also more and more people's attention. Due to the complexity of the characteristics of the chemical medium, coupled with the ever-increasing requirements of environmental protection, how should we use chemical pumps?

　　All along, corrosion is the chemical equipment is one of the most headaches of the hazards, a little carelessness, or damage to the equipment, or cause accidents or even cause disaster.

　　According to relevant statistics, about 60% of the destruction of chemical equipment is caused by corrosion, so the first thing to pay attention to when selecting chemical pump selection of science.

　　Usually there is a misunderstanding that stainless steel is a “universal material”, regardless of what medium and environmental conditions are held out of stainless steel, which is very dangerous. The following chemical pumps for chemical enterprises to talk about some of the main points of use:

　　First, reduce the leakage loss of water supply system

　　(1) during normal operation, the water supply system should be strictly closed to the drainage door, the evacuation door, the pump body drainage door and the boiler's regular drainage door, the accident drainage door should be strictly closed, the door is not strict, should be dealt with in a timely manner.

　　(2) reduce the leakage loss to the chemical pump recovery door, to the chemical pump recovery device is used to keep the start of the chemical pump to the chemical pump, just put into operation, stop the boiler water supply, to maintain a general small flow rate, to prevent small flow rate in the operation process heating, water supply evaporation and accidents. Normal operation, should be strictly closed recovery door, in the field, due to structural and material problems, recovery door general leakage is serious, a large number of high-pressure water supply recovery deaerator useless, resulting in a waste of electricity, and even affect the boiler water supply, at this time, should be timely withdrawn from the operation of repairing the leakage of the recovery of the door is serious, to maintain its good sealing, In addition, in the start-up of the chemical pumps, the pumps should be timely shut down the recovery door in order to reduce the power at this time loss.

　　(3) standby chemical pump export check door should be strict, cast linkage standby chemical pump export door is generally open, check door is not strict lead to high pressure water supply through the pump body leakage back to the deaerator, and even standby pump inversion, should be immediately withdrawn from the standby processing, not only to reduce the high pressure water supply pressure and energy loss, but also loss, and to ensure that the equipment safety standby, in addition, in order to meet the water supply demand, the chemical pump export door can only be In the fully open state standby, other standby pump exit door can be closed to reduce leakage losses.

　　Second, the application of frequency control

　　Chemical pump frequency conversion speed control operation refers to the chemical pump running under the drive of adjustable speed motor, change the working condition point of chemical pumping device by changing the rotational speed, which greatly expands the effective working range of chemical pumps, is a very important and applicable regulation method in this project, at present, the power consumed by the motor accounts for about 65% of the industrial power consumption, and most of the equipment used by the motor is still an ordinary non-speed-regulated motors, if the these non-speed-regulating motors are converted into speed-regulating motors, they can save a lot of electricity with the load, according to the principle of centrifugal pump, in similar circumstances, the flow rate, head and power of chemical pumps are directly proportional to the rotational speed of the primary, secondary and tertiary respectively, for the occasions where the water is frequently changed, the water supply of chemical pumps can significantly reduce the throttling loss, and the energy-saving effect is obvious.

　　Compared with other speed control technology, chemical pump frequency control technology has the following advantages:

　　First of all, the speed regulation is highly efficient: frequency conversion speed control means that the motor is still running near the synchronous speed after the frequency change, basically maintaining the rated speed difference, and the speed loss does not increase, therefore, the frequency conversion speed control chemical pump is a speed control pump with high efficiency.

　　Secondly, the speed range is large: the speed range of the frequency converter can be up to 1% -**, in the entire speed range has a high speed efficiency, when the speed range is less than 30%, the efficiency of the frequency converter can be up to 90%. Therefore, frequency conversion speed chemical pump is particularly suitable for speed range, low load state.

　　Third, the speed regulation and transformation is convenient: speed regulation and transformation of the original motor, no need to replace the motor.

　　Fourth, it can be continuously speed regulation, starting current is small. Selection of the general running speed is good, can realize low-speed start, speed regulation is stable. Generally speaking, high speed is not affected by the power supply, and the motor can be miniaturized at high speed.

　　Fifth, the frequency conversion device can be used as a starting device. The motor is started to a certain speed by the inverter power supply, and then the inverter power supply is disconnected, and the motor is accelerated to full speed by the operating frequency power supply.

　　Sixth, the main circuit can be powered directly. When the frequency conversion device is faulty, it can be withdrawn from operation, and the main circuit can be directly powered without affecting the continuous operation of the chemical pump.