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How to correctly operate the decanter centrifuge

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How to correctly operate the decanter centrifuge

The decanter centrifuge can carry out centrifugal sedimentation of two or three liquid-solid heterogeneous materials with different densities. Usually during the operation of the decanter centrifuge, the main motor drives the two pulleys together to roll, separates the drive drum and the spiral via a gear or a cycloid differential, and maintains a fixed relative differential speed between the two. The equipment is separated at high speed.

   In order to ensure the ideal separation effect, it is necessary to ensure the balance of the decanter centrifuge itself. The centrifuge tubes and their contents should be accurately balanced. In fact, the ultracentrifuge rotor is mounted on a very thin shaft, so when the two centrifuge tubes are balanced, the difference in components must not exceed the scale specified in the instructions of various centrifuges.

  The difference between the two centrifuge tubes of the preparative ultracentrifuge shall not exceed 0.1g. Centrifuge tubes with sleeves should be balanced with sleeves. Centrifuge tube sleeves must not be mixed between different centrifuges. After reaching the equilibrium condition, when adding materials, the balance should also be maintained, so as to avoid asymmetrical centrifugal force damage to the centrifugal shaft and cause serious accidents. After the balanced centrifuge tube is placed symmetrically, cover the decanter centrifuge cover, turn on the power supply, and set the centrifuge speed and centrifuge speed.

   When the separation set time is about to arrive, the deceleration or speed adjustment knob should be turned on in time to decelerate. After the decanter centrifuge naturally stops rolling, open the cover and take out the centrifuge tube. Turn off the power and unplug the power plug. Clean the centrifuge, centrifuge chamber, centrifuge tube, sleeve, etc.

The decanter centrifuge itself is also equipped with an automatic control operating system. After setting the centrifugal speed, centrifugal time, temperature, vacuum and other parameters, turn on the switch and the equipment will automatically operate. After reaching the relevant parameters, record the time. After reaching the set time, the decanter centrifuge will automatically stop and the deceleration device will automatically turn on.

 

By the way, please check the following products of GN company on Alibaba:

Decanter centrifuge

3-Phase Disc centrifuge

Sludge dewatering Screw press

Oil water separator

Centrifugal pump

Vacuum Pump

Submersible pump

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What principles should be followed when using decanter centrifuge?

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What principles should be followed when using decanter centrifuge?

 

When using decanter centrifuge, attention should be paid to the details. Once the fixed sequence is not followed, it is difficult to complete the cleaning quickly. When filtering and cleaning, it is necessary to understand the solid content of the filter.

In general, when the solid content in the liquid is higher, the cleaning time that people need to spend, especially for those liquids with certain viscous properties, should be carried out in strict accordance with the instructions. Do not ignore any process because of blindness or irritability, otherwise it will form an irreparable effect and increase sludge The cost of treatment is small and the big is lost.

Therefore, we should follow the following guidelines when using decanter centrifuge:

1. For the wastewater containing highly toxic substances, such as heavy metals, radioactive substances and high concentrations of phenol and cyanogen, the sewage should be separated from other types of sewage to facilitate the treatment and recovery of useful substances.

2. In the production process of using toxic raw materials and toxic intermediate products, reasonable process flow and equipment should be selected. When using sewage dehydrator, strict operation and supervision should be implemented.

3. The fundamental solution of sewage treatment is to change the traditional production process and reduce the toxic and harmful sewage in the production process as much as possible. Can use non-toxic materials or corresponding products to replace toxic materials or products.

Due to the low moisture content of sludge, stable operation, low energy consumption, simple operation and management, and convenient maintenance, the decanter centrifuge is favored by the majority of users. Next, let's take a look at the features of the decanter centrifuge.

1. The mechanical performance of the decanter centrifuge is stable and reliable. It can complete 24-hour continuous production operation, with large treatment capacity and high output.

2. The new type of double flow flocculation has good dewatering effect, low moisture content of filter cake, convenient and economical follow-up treatment.

3. The structure design is advanced and reasonable. The ultra long gravity filtration dehydration section adopts the vertical strong pressure roller, which has a wide range of application.

4. The filtrate is clean, easy to reuse and reduce secondary pollution.

5. Low flocculation liquid and kinetic energy consumption.

6. The whole machine has good corrosion resistance, convenient operation, easy maintenance and repair.

7. Full automatic operation and control, excellent quality and service life of spare parts.

 

 

Please check the following products of GN company on Alibaba:

Decanter centrifuge

3-Phase Disc centrifuge

Sludge dewatering Screw press

Oil water separator

Centrifugal pump

Vacuum Pump

Submersible pump

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What is the difference between a filter press and a decanter centrifuge?

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What is the difference between a filter press and a decanter centrifuge?

 

  According to years of design experience and surveys on the users of the decanter centrifuge, the following is the analysis of the actual use of the decanter centrifuge:

   1. Applicable medium problem

   Decanter centrifuge is not suitable for all kinds of sludge. After investigation, the decanter centrifuge is not suitable for the sludge containing more inorganic components such as fly ash. Because the fly ash is centrifuged, it is difficult to remove the fly ash attached to the inner wall of the decanter centrifuge. There is a lot of resistance, and the mud cannot come out after it gets in. This situation occurred in a sewage treatment plant in a city in northern my country. The decanter centrifuge was unable to operate normally and had to be changed to a large loss.

   2. The control problem of entering the department

   Decanter centrifuge can automatically adjust the slip and torque according to the change of the feed concentration. Manual adjustment is required. In fact, the change of the feed concentration has a greater impact on the decanter centrifuge, but the impact on it is small.

  3. The problem of solid recovery rate and dosage

   The solid recovery rate of the decanter centrifuge is indeed relatively high, but this does not mean that the low solid recovery rate cannot be used. In fact, the filtering has to be returned to the front and processed from the beginning together with the sewage treatment plant.

The dosage of medicament is controversial. Manufacturers will also say that their dosage of medicament is also small. A certain 15×104t/d urban sewage treatment plant designed by a certain manufacturer uses a decanter centrifuge to dewater. After production, the measured PAM consumption per ton of dry sludge is 1.7-2.0kg, which is relatively low. According to the data, a wastewater treatment plant in Shanghai has also conducted a dehydration drug consumption test, and the amount of chemicals per ton of dry sludge in urban sewage is also about 20kg. Due to the different nature of sludge from various plants, it is difficult to say how much higher the chemical consumption is than the decanter centrifuge.

By the way, please check the following products of GN company on Alibaba:

Decanter centrifuge

3-Phase Disc centrifuge

Sludge dewatering Screw press

Oil water separator

Centrifugal pump

Vacuum Pump

Submersible pump

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What are the characteristics of a three-phase disc centrifuge?

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What are the characteristics of a three-phase disc centrifuge?

   Looking at it now, the price of domestic three-phase disc centrifuges is not very large, and in terms of performance, it is true that domestic equipment is more cost-effective, and it is also suitable in terms of practicality. And the production capacity of many domestic manufacturers is good, they have mastered the important technology of centrifuge, so the price difference will not be very big. If we want to purchase, then we must first confirm the quotation status of different merchants, so that we can also purchase suitable equipment. So what are the characteristics of the three-phase disc centrifuge?

   1. Use safety protection devices

  The use of safety protection device makes the rotating body of the equipment not separated from the motor conjoined body during high-speed rotation. This design is very clever and is very helpful for the smooth work of the machine.

  2. One time investment, no worries afterwards

   Different from other equipment, the subsequent protection of this type of equipment is very convenient and requires limited consumables.

  3, the oil is clear and the purity is good

   The three-phase disc centrifuge adopts a centrifugal extractor, which saves time and electricity, has good oil output, good oil quality, clear color and high purity, and can be sold directly after production without other processing.

 

  4, fast refining speed

        The three-phase disc centrifuge not only integrates heating, vacuum extraction, and centrifugal extraction, but also increases automation. When a certain degree of oil residue is reached, it will automatically clean up, saving time and effort.

  5, save power than ordinary machines

   The three-phase disc centrifuge is not always powered. After the power is turned on, when the drum reaches the normal speed, it will be powered off and work by the centrifugal force of the drum.

 

Of course, we also need to be clear about the differences in the three-phase disc centrifuge host, because the price of refrigerated equipment is much higher than that of general equipment, and some centrifuges can provide heating services, so on the whole The price is also slightly higher. Therefore, it is necessary for us to make purchases according to the equipment and our detailed needs, so that we can select suitable products and ensure a higher cost performance.

Please check the following products of GN company on Alibaba:

Decanter centrifuge

3-Phase Disc centrifuge

Sludge dewatering Screw press

Oil water separator

Centrifugal pump

Vacuum Pump

Submersible pump

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What to do with the inversion of decanter centrifuge

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What to do with the inversion of decanter centrifuge

1. The inversion of the decanter centrifuge, as the name implies, refers to the rotation in the counterclockwise direction. Although the decanter centrifuge can still play a certain dehydration effect under the inversion condition, it is easy to cause shock absorption springs, capacitors and other components in the long run. damage. So we should deal with it in time.

2. The method of investigating whether the decanter centrifuge is reversed is very simple, we only need to investigate whether its working direction is the same as the direction of the rotation arrow marked on the outer cylinder. From the perspective of long-term maintenance service experience, the reverse transmission failure of the decanter centrifuge is mostly caused by problems with the motor, capacitor, and clutch components. We can use the cleaning method to clean up the specific treatment.

3. Regarding the motor, we can open the back cover of the decanter centrifuge and check the power supply. If the motor is idling when the motor is rotating, the belt should be loose, and it can be tightened or replaced. On the contrary, if the motor does not rotate in the forward direction, only the hum of the motor is heard. If the power fails, remove the belt and try again. The possibility that the problem of non-rotation lies in the capacitor or motor, capacitor and winding is very small.

4. Regarding the capacitor, on the premise that the motor has no fault, we can replace the capacitor with the same capacity, and then test the work after power on. If the fault still exists, then please check the normality of the clutch. We can check the tension in the clutch gear. Whether the separating hook on the spring and gear is still in the normal position, then adjust and replace according to the actual situation.

5. After the above-mentioned overhaul and adjustment of the three components of the motor, capacitor and clutch, we can effectively solve the problem of the reverse rotation of the scraper centrifuge. We also remind users that they must pay special attention to this problem when using the decanter centrifuge daily to ensure that its working direction is correct to prevent damage to components and safety accidents caused by inversion.

 

By the way, please check the following products of GN company on Alibaba:

Decanter centrifuge

3-Phase Disc centrifuge

Sludge dewatering Screw press

Oil water separator

Centrifugal pump

Vacuum Pump

Submersible pump