JPS58153571A - Apparatus for diffusing precipitated sludge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a device for spreading deposited sludge.

When crude oil or heavy oil is stored in a crude oil tank or heavy oil tank for a long period of time, sludge builds up on the bottom of the tank.In order to reduce the buildup of sludge, large tanks are equipped with a side-filling mixer on the side wall. ~
However, in the case of large tanks, sludge deposition is still unavoidable, so the following measures are taken.

That is, in the hot water dissolution method, hot water is first created by steam heating, and the sludge is dissolved by pumping it into a tank and circulating it, but this not only increases costs but also takes time to dissolve. Next, in the light oil dissolving method, light oil is poured into a tank and the sludge is dissolved, but similarly it takes time to dissolve it.Furthermore, in the sludge scraping method, after the tank is emptied, a worker must enter the tank. The sludge is then manually removed from the tank, but there are problems such as increased labor costs.

The present invention was proposed in view of the above circumstances, and aims to provide a sedimentary sludge dispersion device that reduces the cost of tank cleaning and also shortens the construction period. a self-propelled frame car that travels on the bottom surface of the tank by remote control; a stirring means attached to the self-propelled frame car that stirs the sludge deposited on the tank bottom surface;
The present invention is characterized by comprising a pump attached to the self-propelled frame car that sucks together the sludge stirred by the stirring means with the stored liquid and discharges it upward.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view thereof, and FIG. 2 is a plan view of FIG. 1.

In the above diagram, 1 is a remote-controlled four-wheel drive self-propelled frame car equipped with wheels 2 made of oil-resistant plastic or oil-resistant rubber, and 3 and 3 are attached to the self-propelled frame car l, respectively, and have left and right front and rear wheels 2. , a pipe guard frame surrounding each of the
4 are provided on the left and right sides of the self-propelled frame car 1, respectively, and are chain wheels 5, 5. Wheel 2.2 through chain 6.6
, 7, 7, and 8 are left and right proximity sensors provided vertically protruding from the front and rear ends of the self-propelled frame car l, respectively, and 8 is a hydraulic motor provided on the self-propelled frame car l that expands downward. A vertical force having a conical part whose diameter at the lowest part is approximately equal to the outer diameter of the rotating brush described later, and which is rotated by a brush hydraulic motor lO to stir the sludge deposited at the bottom of the tank. A brush 11 is an axial flow pump that is installed in the cylindrical portion of the casing 8 and sucks in the sludge stirred by the rotating brush 9 and discharges it upward; 12 is a pump hydraulic motor that drives the axial flow pump 11; 13 14 is a cloth discharge pipe of appropriate length that is fitted into the upper end of the casing 8 and extends upward, and 14 is a hydraulic motor 4 for traveling provided on the self-propelled frame car l.
．． Hydraulic motor for brushes 10. Pressure oil to the pump hydraulic motor 12 and operating pressure oil are supplied to the self-propelled frame vehicle 1 via a hose 15.
Rotary join) 1
Due to the turning action of the hydraulic motor 4, the hose 15 supplies the pressure i to each of the hydraulic motors 4, 10, 42, etc. without being twisted despite the complicated running of the self-propelled frame car l.

Such a device is immersed, for example, in a large crude oil tank, and then slowly moved along the bottom of the tank by remote control from outside in the evening. Then, the suction pressure by the axial flow pump 11 and the pump 1
Because the running frame l receives a downward thrust due to the reaction of the discharge flow caused by If the vehicle travels without slipping, the desired direction change can be performed by controlling the pressure oil to the left and right travel hydraulic motors 4.

At this time, the sludge deposited on the bottom of the tank is scraped around by the rotating brush 9, sucked and pulled together with the crude oil by the axial flow pump 11, and then passed through the casing 8 and the cloth discharge pipe 13 from an appropriate height into the stored crude oil. The discharged sludge is dispersed into the stored crude oil.

The cloth discharge pipe 13 is useful for raising the sludge to a desired height and dispersing it from a high position into the tank in cases where the sludge has a high specific gravity and will soon settle even after being diffused. When the vehicle 1 approaches the side wall of the tank while moving slowly along the bottom of the tank, the proximity sensor 7 touches the side wall, and as a result, the hydraulic motor 4 for traveling is reversed by the action of a control device (not shown), and the self-propelled frame is rotated. Car 1 automatically moves backward. The guard frame 3 protects the self-propelled frame car 1 when the self-propelled frame car 1 collides with the side wall of the tank. To prevent this, rotary joint 1
In both cases, it is necessary to wind up the hose 15 with a constant tension using a tension device (not shown).

The running trajectory of this device is stored in advance in a computer, and the self-propelled frame car is moved into the tank by a position transmitter (not shown) attached to the self-propelled frame car or by an ultrasonic probe installed inside the tank. It is possible to spread the deposited sludge into the crude oil by running it over the entire bottom surface.

Moreover, it is also possible to lay a rail for running the self-propelled frame car on the bottom of the tank so that the self-propelled frame car always runs along this rail.

According to such a device, the following effects can be achieved.

(1) There is almost no deposited sludge.

The cost of tank cleaning is greatly reduced, and the cleaning period is also greatly shortened.

(2) Side-entering mixers are almost unnecessary.

(3) Tank capacity can be used effectively by eliminating deposited sludge.

(4) The sludge that has conventionally been deposited at the bottom of the tank can be constantly diffused into the crude oil by the device of the present invention, so that it can be brought out of the tank and used effectively.

In the above embodiment, this device is always placed at the bottom of the crude oil tank and is run continuously or as required by 1) Ib, but some crude oil remains in the tank during periodic tank cleaning. When the system is in use, the device can be brought into the tank and remotely controlled to run through the residual oil, quickly dispersing the pile of sludge into the residual oil and discharging it as slurry out of the tank. Further, the present invention can be used not only for cleaning sludge at the bottom of a tank, but also for cleaning sediment in an intake channel of a hydroelectric power plant.

In short, according to the present invention, a self-propelled frame car is immersed in the liquid stored in a tank and runs on the bottom surface of the tank by remote control, and a stirring means attached to the self-propelled frame car is attached to the self-propelled frame car and stirs the sludge deposited on the tank bottom surface. and a pump attached to the self-propelled frame car that sucks the sludge stirred by the stirring means together with the stored liquid and discharges it upward,
Reduce tank cleaning costs and shorten construction time.
The present invention is extremely useful industrially because it provides a deposited sludge dispersion device that enables effective use of sludge.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing one embodiment of the present invention, and FIG.
The figure is a plan view of Figure 1.
5. Chain wheel, 6. Chain, 7. Proximity sensor, 8. Casing, 9. Rotating brush, lO
・・Hydraulic motor for brush, 11・・Axial flow pump, 12・
・Pump thread pressure motor, 13... Fabric discharge pipe, 14...
Rotary joint, 15...hose, sub-agent Masafumi Tsukamoto, patent attorney

Claims (1)

[Claims] A self-propelled frame car that is immersed in the liquid stored in the tank and travels on the bottom surface of the tank by remote control; a stirring means attached to the self-propelled frame car that stirs the sludge deposited on the bottom surface of the tank; and the above-mentioned self-propelled frame car. 1. A sedimentation and sludge dispersion device, characterized in that it comprises a pump attached to the pump, which sucks the sludge stirred by the stirring means together with the stored liquid and discharges the sludge upwardly.