Brief Analysis of Energy Saving Measures for Textile Filter System

In cotton textile enterprises, the energy consumption of dust filter systems cannot be ignored. Many cotton textile enterprises have unreasonable design and use of dust filter systems, resulting in waste of energy. Therefore, it is of positive and practical significance to explore the rational design and use of textile dust filter system and reduce the energy consumption of textile dust filter system.

1 Energy-saving measures in the design of textile dust filter system

Reasonable design of the dust filter system to ensure a reasonable wind speed of the dust filter system and reduce the system wind resistance of the pipeline is a prerequisite for ensuring energy saving of the dust filter system of cotton textile enterprises.

When the air flows in the pipeline, it needs a certain amount of energy to overcome the resistance of the pipeline. The length of the duct and the size of the section directly affect the resistance of the pipeline, thus affecting the energy consumption of the whole system. Therefore, when designing the dust filter system, it is necessary to reasonably arrange the direction of the exhaust duct and accurately calculate the resistance of the pipeline.

1.1 exhaust pipe to minimize the length

As far as possible, arrange the main exhaust duct of the dust filter system in the middle of the system to shorten the length of the branch duct. Because the diameter of the branch air duct is small, the wind resistance is greater at the same wind speed, and the branch pipe can be quickly integrated into the main air duct as soon as possible, which can effectively shorten the air duct length of the whole system and help reduce the total pipeline resistance.

According to the frictional resistance formula of the fluid in the pipeline:

Where: h - frictional resistance of the pipe (N/m2)

- friction coefficient of the pipe

V——flow rate of fluid (m/s)

- the density of the fluid (kg / m3)

L - length of the pipe (m)

D——the diameter or equivalent diameter of the pipe (m)

According to the frictional resistance formula, the frictional resistance h of the fluid in the pipeline is inversely proportional to the diameter or equivalent diameter of the pipeline under the condition that the other flow conditions of the fluid are constant, since the diameter or equivalent diameter of the main conduit is larger than the diameter of the branch conduit or Equivalent diameter, so the resistance of the fluid in the main pipe of the same length is less than the resistance received in the pipe; at the same time, the frictional resistance h of the fluid in the pipe is proportional to the length of the pipe. The longer the total length of the pipe, the greater the system resistance .

1.2 Reduce the number of special-shaped pipes such as elbows, tees, and reducers in the dust filter system

These shaped pipes cause a sharp change in the flow rate, flow direction, etc. of the fluid, resulting in a large local resistance, resulting in energy loss of the fluid. This is because the frictional resistance of the pipe of the profiled pipe such as elbow, tee, and variable diameter is much larger than the frictional resistance of the straight pipe.

1.3 Reasonable selection of pipe diameter to ensure reasonable wind speed

The diameter of the pipe directly affects the wind speed. According to the frictional resistance formula, the frictional resistance of the pipe is proportional to the square of the wind speed. Therefore, the pipe diameter should be reasonably selected to ensure the dust filter system:

(1) The suitable cotton-to-gas ratio and cotton dust in the dust filter pipeline do not settle;

(2) The wind pressure of the dust filter system meets the requirements of the process, and the cotton can be sucked away in time without any pipe blockage;

(3) The air volume and wind pressure between the various machines of the dust filter system are in good agreement, especially in the case where the first and tail platforms do not have poor suction.

On the basis of ensuring that the entire dust filter system meets the above conditions, the fluid velocity is reduced as much as possible to reduce the energy consumption caused by the pipe resistance.

1.4 Reasonably match the model of the dust filter system to reduce the energy consumption of the dust filter system

The selection of the main fan model of the dust filter system is very important, and the model selection is not appropriate. The occurrence of “small horse-drawn cart” or “large horse-drawn cart” is unfavorable to the energy saving of the enterprise.

The selection of the fan type of the dust filter system should be carried out in the following two aspects:

1.4.1 Select the fan according to the relationship between the total pressure and flow of the fan

Due to the high resistance and large air volume, the textile dust filter system generally selects high-pressure, high-flow, high-efficiency centrifugal fans. In the selection, we must not only consider the cost of one-time investment, but more importantly, we must consider the effect of economic operation throughout the year, and we cannot ignore the various qualities and requirements of the wind turbine.

1.4.2 Select the fan according to the position of the fan in the dust filter room

For the textile dust filter system, the general ventilator should be located behind the dust filter unit. At this time, the air filter dust has little dust and fiber. It will not cause accidents due to dust and debris, which will affect the life of the equipment. Efficient rear curved centrifugal fans should be used to save energy. However, if it is a dust exhaust fan located in front of the dust filter unit, the quality of the anti-winding and hanging flower of the fan is relatively high. Radial blade fans that can effectively prevent the hanging flowers should be used, such as a combing and unloading belly cotton relay fan. When the front curved blade fan is used, although the wind pressure is high, the efficiency is low and the flower is easy to hang.

2 Energy-saving measures in the use of textile dust filter system

In order to ensure the good dust filter effect of the dust filter system, it is necessary to encrypt and thicken the filter material, which will inevitably increase the resistance and energy consumption of the dust filter system. Therefore, it is necessary to reduce the running resistance of the system, which is a necessary measure to reduce the energy consumption of the dust filter system. Start with the following aspects.

2.1 Appropriate increase in filtration area

Properly increasing the filter area of ​​the dust filter can reduce the filtration wind speed, reduce the filtration resistance, and reduce energy consumption. At this time, the filter effect of the dust filter is also improved, and the dust filter system is stable. Properly increasing the filtration area is a more cost-effective method. For example, when using a multi-cylinder dust filter unit, increase the number of cylinders, etc.

2.2 Improve cleaning effect and frequency

When the filter material is completely cleaned, the filtration resistance is the smallest. At this time, the adhesion between the fiber dust and the filter material is minimal, and the dust on the filter material is easily removed. When the fiber dust gradually gathers on the surface of the filter material to a certain thickness, a dust filter layer is formed, the filtration resistance is gradually increased, and the energy consumption of the dust filter system is also increased. Therefore, the dust filter system should be cleaned at all times. When the dust suction nozzle cannot ensure that the filter cloth is cleaned in time, it should be treated in time and manually cleaned if necessary. If the cleaning is not timely, the dust on the surface of the filter material will accumulate too much. If the system resistance exceeds the rated range, the whole dust filter system will be out of adjustment, resulting in the pipeline being blocked, the cotton can not be sucked away in time, and so on.

Therefore, it is very important to remove the dust accumulated on the filter material in time to ensure the cleanliness of the filter material to reduce the energy consumption of the filter system.

3 Conclusion

The dust filter system of textile enterprises is not only the necessary facilities to ensure product quality and improve the production environment of the workshop, but also the facilities that consume more energy. Therefore, optimizing the design of the dust filter system and improving the operation quality of the dust filter system are not only the need for energy saving but also the improvement. The needs of the quality of production and management of enterprises must be given full attention by all enterprises.