JPS6178451A - Centrifugal separator - Google Patents

Abstract

PURPOSE:To enhance the separation capacity of heavy and light liquids while reducing power loss, by providing a detector inserted in a light liquid discharge flowline and detecting the heavy liquid component in the light liquid and a control apparatus for controlling the control valve of working water for opening a main valve in response to the output of said detector. CONSTITUTION:In the purification of lubricating oil or fuel oil, a centrifugal separator is rotated at a constant speed and, thereafter, a raw solution is supplied from a feed pipe 11 and centrifugally separated on a separation plate 5 to form a laminar layer in the order of a solid component, a heavy liquid and a light liquid from the outer diameter side on the basis of specific gravity difference. The separated and purified light liquid component is guided to a storage tank through a light liquid outlet weir 15 but the heavy liquid component is gradually accumulated in a separation chamber 24 and, when the interface of the heavy and light liquids exceeds an inner limit surface D1217 to be moved inwardly, the moisture detector 22 provided to a light liquid pipeline 21 is operated and the output signal thereof is sent to a control apparatus 23. The control apparatus 23 operates a valve opening working water control valve 33 on the basis of said signal and the discharge of the solid component and the heavy liquid is attained by the introduction of working water.

Description

[Detailed description of the invention] [Industrial usage ′i′fJ The present invention relates to a centrifuge.

[Conventional technology]

A lubricating oil containing all solids and water, the oil tank is divided into two parts and one centrifugal part; one centrifuge is used; In order to maintain the interface between water 7) (hereinafter referred to as heavy liquid) and oil (hereinafter referred to as discharged liquid) in the chamber stably on a predetermined radius of the separation plate, an annular shape is installed at the outlet of the heavy liquid passage. An exit weir (hereinafter referred to as a control board) is provided.

However, in this type of centrifugal separator, when the specific gravity of the processed oil (hereinafter referred to as the raw solution) changes, the optimal method is used to position the adjustment plate on a predetermined radius of the entire heavy liquid-light liquid interface. It is difficult to handle because the adjustment plate must be changed directly.

Also, as an alternative to the adjustment plate method, is it possible to detect moisture in the light liquid discharged from the centrifuge? There is also a known means for controlling the discharge of heavy liquid by detecting oil in the heavy liquid and opening and closing an on-off valve inserted into a heavy liquid discharge pipe.

By the way, after the oil shock, due to the deterioration of the oil situation,
The specific gravity of fuel oil, etc. tends to increase, and the fuel oil level of a marine diesel engine in line 1c appears largely within this term.With the adjustment plate system, when the specific gravity of oil increases, the same adjustment plate Because the range of oil specific gravity within which the interface can be maintained within a predetermined radius range is narrow, the quality of refined oil is reduced and oil runoff losses due to discharged heavy liquids are increased.

On the other hand, in the method of discharging heavy liquid using an on-off valve;fill 7aII, if the specific gravity of the stock liquid is small, the free surface of the heavy liquid moves outward in the radial direction, so the electric switch is not pushed out sufficiently, resulting in poor discharge. If the specific gravity of the stock solution is large, the specific gravity of the light and heavy liquids will be close to each other, so the free surface level of the heavy liquid will be close to that of the light liquid, and the heavy liquid will always have a heavy f
There is also the problem that power loss cannot be avoided because the stool is immersed in a heavy liquid in the stool chamber.

[Problem that the invention seeks to solve]

The present invention has been proposed in view of the above circumstances, and has a high or low separation performance for heavy liquids and light liquids, regardless of the specific gravity of the stock solution. The purpose of the present invention is to provide an easy-to-handle, low-cost, high-performance centrifugal separator with low power loss.

[For production]

With such a single operation, it is possible to create an easy-to-handle, high-performance long-range, high-performance, high-performance 5W machine that improves the separation performance of heavy and light liquids and reduces or eliminates power loss, regardless of the specific gravity of the stock solution. can be obtained.

[Actual application list]

Embodiment 2 drawings of the present invention (To explain more specifically, Fig. 1 is a partial longitudinal system diagram showing the first embodiment of the present invention, Fig. 2 is a &
It is a partial longitudinal system diagram which shows the second practical example of the invention.

In the above figure, 1 is not shown. It is a rotating body that rotates at high speed around a vertical axis Z-Z by a driving means, and a rotating body M2 is fitted onto the upper part of the rotating body by a tightening member 4.

3 is a light liquid chamber attached to the upper part of the rotating body lid 2;
6 is a main valve inserted into the lower part of the inner periphery of the rotary cylinder 1 so as to be slidable in the vertical direction; 8 is a rotary cylinder; A plurality of flakes are movable in the radial direction on the outer periphery of the valve 8, respectively; is the impeller inserted into the upper opening of the rotating body M2,
The integral high-speed rotation of the rotating body 1 and the rotating body part 2 is such that there is no difference between one stationary position and one minute distance between the rotating body and the rotary body 2.

Reference numeral 11 denotes a feeder tube for undiluted solution 1 liner inserted in the axis Z-Z direction through the upper end opening of the turning body tube 2; mosquito'
2 discharge holes for sludge discharge, 13 and 14 respectively, and a closing valve operating water inlet and an opening valve operating water inlet provided concentrically at the lower part of the rotating cylinder 1, 15 and 1 rotating cylinder stone. 2 is formed in the upper end opening. ii) Liquid outlet weirs, 16 and 17 are respectively inside the separation plan 24 (C is an interface between the heavy and light liquids formed, 1B is the main well water chamber, 19 is in the night chamber 3, where the tV niece 2 night is temporarily stored) 1 diameter, VL chamber, 20 is a light liquid passage that communicates with the light chain impeller 10, 21 is connected to the light liquid passage 20 at one end and discharges light liquid by 7 parts, and 20 is a light liquid passage 122 that is connected to the light chain impeller 10; q route 21 (moisture detection 2: ÷, 23!'i)
1. Such a device, which is a control device for controlling the feed valve 33, is used to feed the stock solution from the feeder tube 11 through the guide tube 7 after the centrifugal separation reaches a constant speed. Then, the stock solution is centrifuged on a separation number 5, and due to the difference in specific gravity, 3 layers of type Ii are separated radially inward from the outer side.

Light 1 sparrow/D term ('This layer is removed in the separation chamber 24.

At that time, on the separation number 5, 111 pieces were made, +7 was made.
The night liquid rises between the outer periphery of the guide tube 7 and the inner diameter of the separation plate 5, crosses the light liquid outlet weir 15, enters the light C night room 19, and flows from the outer periphery of the stationary light liquid inopeller 10. It enters the tank while turning, and is led to an external storage tank via a light passageway 20 and a laminar fluid passageway 21.

On the other hand, the outside of the heavy liquid gradually accumulates in the separation chamber 24 in the rotary cylinder, and when the heavy/light liquid interface moves inward radially beyond the self-limit surface D217, the amount on the separation plate 5, ? it
The temperature drops by 1 degree, and the light liquid begins to mix with the heavy liquid.

Then, the moisture detector 22 inserted into the light liquid pipe 21
detects the moisture in the light liquid (heavy liquid), and the output signal is divided into two parts.
23 is the signal, and when the set value is reached, open the valve opening operation water 1j control jf33, and fill the operation water from the opening operation water input 14 to open the water chamber of the sub-valve 8; *；”vsu.

From this, the secondary pressure 8 slides inward in the radial direction: Ih,
The working water in the main valve water chamber 18 is discharged via the sub-valve 3, and the main valve 6 opens further due to the internal pressure of the separation chamber 24, and solids and heavy liquids in the rotary cylinder 1 are discharged to the outside from the discharge hole 12. be done.

After discharging, the timer action VC stops the supply of working water from the valve opening working water inlet 14, and all the working water in the sub-valve 8 is discharged from the drain nozzle 9, and the sub-valve 8 is turned outward by force. When it is slid in the radial direction and closed, operating water is supplied from the valve closing operating water inlet 13 to the main valve water chamber 18, and the main valve 6 is closed.
is pushed up by the water pressure and contacts the panokino attached to the lower end of the rotating body lid 2, the discharge hole 12 is closed and the discharge of the ffl liquid in the rotating body is stopped.

In this way, the discharge of heavy liquid and sludge inside the rotating barrel is controlled by the control device and timer, and only the solids and heavy liquid separated in the separation chamber are self-assistedly discharged, while the light liquid is It will not be discharged as a contaminant.

In this case, instead of the moisture detector 22, a C1 dielectric constant meter, an electrical conductivity meter, a density meter, a pressure gauge, and a detector that detects the difference between oil and water can also be used.

If such i and tv are used, the following effects can be achieved.

(1) Even if the specific gravity of the stock solution fluctuates over a wide range, the discharge of the heavy liquid can be maintained within the range of its own limit surface D2 to its outer limit surface D5.

(21) Even if the specific gravity of the original material fluctuates widely, preventing contamination in the light liquid can also prevent leakage in the heavy liquid at the same time.

(3) Power loss can be reduced by not using insects, night crawlers, and main night crawlers.

(4) Since heavy liquid pipes are not required, bond construction is simplified.

1. The present invention can also be applied to the conventional three-phase structure.

In other words, the second real mi column is
Figure/ζchi/te, 25 is [one body,? Out of 12: Iiii
Upper part i'C7f, the circle forming 26 in the middle of the night (in the form of Homare and Dj River! Stone-shaped water drop plate, 27 is 1 in the heavy liquid passage 26) The heavy liquid passageway 28 leading to the chamber tube 30 is a heavy liquid outlet weir forming the heavy liquid passageway 27, and has one diversion weir opening with an inner diameter D4.

29 is an integral part of the light liquid impeller 10 and its upper part ((attached heavy liquid impeller - 1 x 1 night chamber, 32
1 is a heavy liquid conduit for discharging the heavy liquid from the heavy liquid impeller 29 to the outside, and the other structures are substantially the same as those shown in FIG.

In such a device, the inner diameter D4 of the heavy outlet and return 28
is set smaller than iD+ of the light liquid outlet weir 15.

Then, the heavy liquid 41j heated externally in the separation chamber 24 reaches the heavy liquid passage 27 via the liquid passage 26, but the free surface of the heavy liquid S generally flows outward in a semi-spherical direction from that of the light liquid S: In order to cover the relationship I) 4 < D+ (from l, heavy liquid outlet it
Without entering the heavy liquid chamber/bar 30 beyond the i 28, its free surface remains within the heavy liquid channel 27 and has essentially the same effect as the g1 example.

〔Effect of the invention〕

According to the present invention, the required IC is provided on the rotary cylinder. A separator plate type centrifuge (with a main valve for discharging solids and a four-position liquid innovator equipped with a light liquid discharge channel)
A detector inserted into the light liquid discharge flow path to detect all heavy liquid components in the light liquid, and control for controlling the main valve opening working water fllJ fa'l] valve in response to the output of the detector. By equipping it with equipment, it is possible to obtain a complete centrifugal separator that improves the separation performance of light liquids, regardless of the specific gravity of the stock solution, and reduces power loss. The present invention is extremely useful in the field of business.

[Brief explanation of drawings]

FIG. 1 is a partial vertical system diagram showing the entire first embodiment of the present invention, and FIG. 2 is a partial vertical system diagram showing the second embodiment of the invention. 1. Rotating cylinder, 2. Transmission body lid, 3.. Light liquid chamber, 4.. Tightening ring, 5.. Separation plate, 6.. Main valve, 7.. Guide cylinder, 8.. t, +U valve, 9...drag/
Nozzle, 10... Light liquid impeller, 11... Feeder pipe, 12. Discharge hole, 13... Valve closing operation water inlet, 14
・, Valve opening operation water inlet, 15...Light liquid outlet weir, i6. i
7... Interface, 18... Main valve water chamber, 19... Light liquid chamber,
20...Light liquid passageway, 21...Light liquid pipe line, 22...Moisture detector, 23...Control device, 24...Separation chamber, 25
...water tray, 26...heavy liquid passage, 27 heavy liquid passage,
28. Heavy liquid outlet weir, 29. Heavy liquid repeller, 30.
...Heavy liquid chamber, 62...Heavy liquid pipe line, 3 filters 1. Control valve, Dl...Light liquid outlet weir inner diameter, D2, self-limit surface inner diameter, D5
・Outer corner interface inner diameter, D4・Heavy liquid outlet weir inner diameter.

Claims (1)

[Scope of Claims] In a separator plate type centrifugal separator having a main valve for discharging solids provided on the rotating body and a light liquid impeller provided in the light liquid discharge passage, A centrifugal separation system characterized by comprising: a detector for detecting a heavy liquid component in a light liquid; and a control device for controlling an operating water control valve for opening a main valve in response to the output of the detector. Machine.