Boiler Energy-saving renovation is a hot topic in today's energy-saving and environmental protection industry. EPCB uses the most professional technology and the most direct way to solve the most direct needs of users on the user side. To this end, a special topic on boiler and auxiliary equipment energy-saving transformation has been introduced to help users solve the most concern energy-saving problems.

The first topic is the boiler water pump power-saving transformation technology. The water pump is a necessary equipment to meet the safe operation of the boiler. Its power consumption accounts for a large proportion of the auxiliary electrical and mechanical consumption. Therefore, its energy-saving transformation treatment will maximize the energy-saving transformation. , Save operating costs and help you become a leader in the industry.

Boiler Water Pump Function and Power Saving Potential Analysis

Boiler water supply equipment includes feed water pump, supply pump and hot water circulation pump. These equipments are necessary for normal heating and continuous safe operation of boilers. Its power consumption accounts for a considerable proportion of the auxiliary electromechanical consumption.

Boiler Water Pump in operation Energy consumption phenomenon

1) There is a phenomenon of "big horse-drawn carts".

The rated output of the boiler is greater than the actual heating load, so the load rate is low, which causes the selection of the water pump to be too large, mismatched, and higher power consumption.

2) Optional water pump for rated pressure, large power waste

Most steam boilers operate at reduced pressure and rarely operate at rated pressure. The water pump is selected according to the rated pressure of the boiler, and there is still a certain margin, which results in the high lift of the water pump and the high power of the motor, which causes power waste.

3) variable working condition regulation method is backward ,high power consumption

The heating load of industrial boilers fluctuates greatly, and the selection of water pumps is large, and the control method of variable working conditions is relatively backward. Generally, it is achieved by adjusting the valve opening, the resistance loss is large, and the power consumption is increased.

4) The heating load is adjusted according to temperature, high power consumption

Most high-temperature hot water boilers operate as low-temperature hot water boilers, and the changes in heating load are accustomed to using temperature to adjust, and seldom use circulating water pump flow for volume adjustment, resulting in high power consumption.

5) Unreasonable pipe network layout and large resistance loss,increase the water pump power consumption.

Boiler Water Pump Power Saving Reformation Technology

Water Pump Staging Modification Technology

1) Boiler Multi-Stage Feed Water Pump Pumping transformation.

The head margin of the water pump is large, and the head required by the water supply system is smaller than the original supporting head,causes waste and increases power consumption.

Based on this, multi-stage pumping can be modified, and the surplus part of the head can be removed to save electricity. During the transformation, detailed calculations should be made. According to the head margin, one or more impellers should be removed and replaced with a sleeve of equal length. The flow rate of the multi-stage feedwater pump after pumping is basically unchanged, the head is reduced accordingly, and the axial force rate is obviously reduced, so the energy saving effect is significant, which has been proved by the practice of many factories.

 It is generally better to choose the inlet side for pumping stage transformation, and the method is simple, and ordinary factories can be transformed by themselves.

2) Boiler Single-Stage Feed Water Pump cutting Impeller Transformation.

According to the rule that the ratio of the impeller diameter to the flow rate, head and power of the water pump is linear, quadratic and cubic, a charging method for cutting the outer diameter of the impeller is developed.

The main point of this method is to cut the outer diameter of the impeller appropriately so that the thinning between the outer diameter of the impeller and the pump casing is appropriately increased compared with the original. After cutting, the number of revolutions of the water remains the same, the flow rate is slightly reduced, the head is reduced by the quadratic, and the power is reduced by the cubic, so the energy saving effect is obvious.

Before the transformation,calculated the cutting amount of impeller outer diameter in detail according to the required head and other parameters, and take the actual cutting amount as the actual cutting amount after appropriate correction.

Frequency Conversion Speed Regulation and Constant Speed Tracking Load New Power Saving Technology

1) The frequency conversion speed regulation of the water pump is the same as the fan.

In recent years, many companies have installed frequency converters in their boiler feed water pumps, which has achieved significant power-saving effects.

2) Boiler feed water pumps and supply pumps are more suitable for the application of frequency conversion speed regulation and load tracking comprehensive power saving technology.

Because the pump usually requires a certain head, that is, the motor speed should be constant. If the originally installed water pump has a margin, it can be adjusted and controlled according to the variable load, and the combined setting or single setting function can be applied to double power saving, and the effect will be better.

3)The hot water circulating pump can also apply comprehensive power saving technology.

In the past, it was customary to adjust the heating load with temperature. If a variable frequency speed regulator is installed to adjust the motor speed, the pump head will be affected and the heating requirements will not be met. When the comprehensive power-saving device is installed, the motor can be guaranteed to run at a constant speed, and it can continuously, accurately and automatically track changes in the motor load, and adjust the motor input voltage in time to ensure that the motor runs in the high-efficiency range and the power factor is above 0.96.

The power saving effect is obvious. If the circulating pump head has a margin, coupled with variable load adjustment control, the power saving effect will be better.

4) After the power-saving transformation of water pumps, apply comprehensive power-saving technologies.

Because the above-mentioned water pump transformation can only be determined according to the actual maximum heating load, when the load becomes smaller, the water pump still has the potential to save electricity.

Renovation of Fan and Water Pump Pipe Network to Reduce Resistance Loss

Some fan and water pump pipe networks, including the air chamber structure and flue, are unreasonable in design and installation, and the system resistance loss is large, which affects the increase of motor power consumption, such as eddy current loss, sharp turning impact loss, air leakage loss, etc.

Try to transform and reduce resistance loss, to achieve the purpose of power saving. This power-saving potential is widespread and should not be ignored.

Conclusion

Industrial boilers have huge energy-saving potential. In the case of power shortages in factories all over the world, energy-saving and power-saving become more important. The boiler products designed by EPCB ensure the long-lasting, efficient and safe operation of the boiler, while Maximize the application of energy-saving technology to save every penny of users and improve the competitiveness of the industry.

EPCB, Your Private Boiler System Expert!

Boiler Use Guide：

Boiler Safety Guide |Comprehensive Boiler Safety Operation Manual

Boiler Energy-Saving Technology--Boiler Water Pump Power-Saving Transformation

Industrial Boiler Energy-Saving Transformation Case