JP4740412B2 - Continuous centrifuge - Google Patents

Description

  The present invention relates to a continuous centrifugal separator that can easily separate and classify fine dust floating in a fluid.

  Patent Documents 1 to 7 relating to a centrifugal separator are examples of prior art that have been filed for a centrifugal separator.

  Even if you refer to any of the above patent documents, the high pressure side impeller, which is a combination of large and small impellers with different diameters, is attached to the shaft and rotated at high speed, and the differential pressure between the high and low pressure impellers A centrifugal separator having a structure for storing dust in a water storage chamber provided below the main body while separating and classifying the dust while sucking and pumping the dust into the main body provided with the impeller. There wasn't.

  It has been a very difficult problem to obtain a strong centrifugal action continuously. For example, in the application of separating suspended dust in a paper mill, there have been problems such as pumping by continuous suction of suspended dust, clogging of a filter, downsizing of an apparatus, reduction of required power, and the like.

As an improvement measure, the present invention attaches and fixes the high-pressure side impeller and the low-pressure side impeller to the shaft supported by the bearing and pumps them using the differential pressure of the high / low pressure impeller. A method of separation and classification by car was adopted. There is no filter clogging between the suction port and the discharge port, so there is no clogging of the filter, and the size and efficiency of the device is reduced because the pressure is fed using the differential pressure between the high and low pressure impellers rotating at high speed by the power source Can be achieved.
JP-A-2005-282300 JP 2002-224589 A JP 2001-121036 A JP 2000-094842 A (Patent No. 3609292) JP 2000-254551 A (Patent No. 3747433) Japanese Patent Laid-Open No. 11-047638 (Patent No. 3674739) JP 07-232202 A (Patent No. 2951839)

The problem to be solved is that solids such as dust and substances other than the fluid such as oil mist cannot be separated and classified from air, water vapor and other fluids. The present invention can obtain a strong centrifugal force by rotating a high-pressure side, a low-pressure side and a plurality of impellers attached to the shaft back to back and rotating at high speed, and at the same time, by the differential pressure of the high-low pressure impeller It is an object of the present invention to provide a centrifugal separator capable of separating and classifying substances other than the fluid from the fluid, characterized by continuously pumping.

The present invention has a suction port and a discharge port, a main body forming a water storage chamber in the lower part, a drainage port for discharging water stored in the water storage chamber, and a drain outlet provided at the lowermost part of the water storage chamber The high-pressure side impeller and the low-pressure side impeller are both fixed back to back on a shaft supported by a bearing, and are driven by a prime mover that can rotate at high speed within the main body. The high-pressure side impeller and the low-pressure side impeller may be attached to the shaft in a skewered manner at different positions respectively back-to- back, or may be attached to the shaft integrally made back to back . A cleaning nozzle is provided near the top of the main unit and the entrance of the high-pressure impeller, and cleaning water can be ejected, and a seal is provided to prevent the inflow of outside air from the shaft penetration part or the leakage of fluid from the main unit. The shaft is rotated by a prime mover via a shaft joint, or driven by a belt or the like via a pulley or the like. The gantry supports the prime mover, and the floor is equipped with a set of the main body, prime mover, gantry, etc. and can withstand high speed rotation.

The centrifugal separator of the present invention solves the continuous strong centrifugal action with the simple structure as described above, and increases the number of impellers to form a multistage system, or As long as the strength permits, it is possible to collect and classify extremely fine dust by increasing the peripheral speed.
Since part of the power can be reduced by the low-pressure impeller, the required power is greatly reduced compared to the case where both the high-pressure impeller and the low-pressure impeller are operated individually.
Since parts such as a filter that are clogged are not used, the period of pauses due to internal cleaning or replacement of parts is long, and continuous operation is possible.

Using the differential pressure between the high-pressure impeller and the low-pressure impeller attached back to back on the shaft rotating inside the main body, the suspended dust is sucked into the main body, pumped to the discharge port, and continuously centrifuged. This was achieved without compromising the size of the equipment and reducing the required power.

FIG. 1 is a cross-sectional view of an embodiment of the device of the present invention, in which 1 is a main body, 2 is a suction port, 3 is a discharge port, 4 is a high-pressure side impeller, 5 is a low-pressure side impeller, 6 is a shaft, 7 and 8 are bearings, 9 and 10 are seals, 11 is a shaft joint, 12 is a water storage chamber, 13 is a floor base, 14 is a prime mover, 15 is a base, 16 is a washing nozzle, 17 is a water distribution port, and 18 is drained. is there.

As an example, a case where mixed dust is removed from the air will be described.
The main body 1 is provided with a suction port 2 and a discharge port 3, and is provided with a high pressure side impeller 4 and a low pressure side impeller 5 which are attached to the shaft 6 supported by the bearings 7 and 8 together back to back. The shaft is connected to the rotating shaft of the prime mover 14 via the shaft joint 11 so that the high and low impellers 4 and 5 are driven by the rotational force of the prime mover 14. A water storage chamber 12 is provided on the lower floor 13 of the main body 1, and a drain outlet 17 and a drain outlet 18 are provided in the water storage chamber 12.
Since the high-pressure side impeller 4 takes measures such as making its diameter larger than that of the low-pressure side impeller 5, the high-pressure side impeller 4 becomes the low-pressure side impeller 5 even at the same rotation speed. The generated pressure is larger than that.
Therefore, if the shaft 6 rotates at a high speed, the main body 1 generates the high-pressure impeller 4 and the low-pressure impeller 5 attached back to back on the shaft 6 while maintaining at least the pressure generated by the low-pressure impeller 5. The sucked fluid is pumped from the suction port 2 toward the discharge port 3 by the action of the difference between the two pressures.

When air mixed with dust is sucked in from the suction port by the pressure feeding action, it is scattered inside the main body 1 by the strong centrifugal force by the high-pressure side impeller 4.
In the low-pressure impeller 5, air can flow from the outer periphery of the low-pressure impeller 5 toward the center due to the pressure difference between the high-pressure impeller 4 and the low-pressure impeller 5, but dust has a specific gravity compared to air. Since it is large, the inflow from the outer peripheral portion toward the center is extremely difficult due to the centrifugal separation action by the centrifugal force, and the dust stays inside the main body 1.

  Dust scattered in the main body 1 or adhering to the inner wall of the main body 1 is guided to the drain outlet 17 through the lower water storage chamber 12 while being washed by the water flow ejected from the washing nozzle 16 and discharged.

  In the above apparatus, as shown in FIG. 1, the dust is stored in the water storage chamber 12 provided at the lower part of the main body 1 and is discharged from the discharge port 17 as supernatant water. Since the drainage 18 is provided, the dirt in the water storage chamber 12 can be cleaned during maintenance.

  Since the method of pumping with the pressure difference between the high-pressure side impeller and the low-pressure side impeller is adopted, floating dust can be generated in the main body without using separate power by using the power to rotate the high / low pressure impeller. It can be sucked and pumped, and there is a power saving effect that reduces the power consumption of the power of the operating equipment.

In the description of the embodiment, solid dust mixed in the air has been described. However, not only solid dust in air and other gases, but also oil mist separation, solid separation in liquid, etc. There are various applications. As an example, the discharge of steam, which is indispensable for paper mills, contains fine dust in the steam. Paste-like paper clay adheres to the inside of the wind guide pipe. This measure was extremely difficult, but can be solved all at once by the present invention. In some cases, it is possible to perform a dry operation without using cleaning water or the like, and the application can be further expanded for environmental purification .

It is explanatory drawing which showed the implementation method of the centrifuge. Example 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Suction port 3 Outlet port 4 High pressure side impeller 5 Low pressure side impeller 6 Shaft 7, 8 Bearing 9, 10 Seal 11 Shaft joint 12 Water storage chamber 13 Floor base 14 Motor 15 Base 16 Cleaning nozzle 17 Water distribution port 18 Drain removal

Claims (4)

Has a suction port and discharge port, the body forming the water chamber to the lower, provided with a drain outlet for discharging accumulated in the water storage chamber water, the drainage provided at the bottom of the reservoir chamber, the diameter The high-pressure side impeller and the low-pressure side impeller, which are made larger than the diameter of the low-side impeller, are fixed back to back on the shaft supported by the bearing and driven by the prime mover so that they can rotate at high speed in the main body. Continuous centrifuge. 2. The continuous centrifugal separator according to claim 1, wherein the high pressure side impeller and the low pressure side impeller are attached to different positions in a skewered manner back to back on the shaft supported by the bearing. 2. The continuous centrifugal separator according to claim 1, wherein a high-pressure side impeller and a low-pressure side impeller which are integrally formed back to back are attached to a shaft supported by a bearing. The continuous centrifugal separator according to any one of claims 1 to 3 , wherein a high pressure side impeller and a low pressure side impeller are attached in a multistage manner to a shaft supported by the bearing .

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