JPS5876143A - Method for forming oil lump by impregnation and adsorption of waste oil - Google Patents

Abstract

PURPOSE:To adsorb an oil flowed out onto the surface of waste water by a treating substance made of a waste material in good efficiency, by using fine powdery fragments obtained by a method wherein sludge containing clay, line, talc and a fibrous substance is dehydrated and the resulting dehydrated sludge is crushed and dried by a crushing type fluidized dryer apparatus to utilize as an oil adsorbent. CONSTITUTION:A waste material containing clay, line, talc and a fibrous substance discharged from a papermaking factory is dehydrated to be formed into a cake. When this cake is thrown into a fluidized classifying chamber 2 from the throwing-in port 4 of a crushing type fluidized dryer apparatus, it is crushed by a crushing blade wheel 1 for generating a rising deflected gas stream and crushed segments are mutually impinged and redivided while thrown up in the chamber and fallen. The cake crushed segments finely divided by repeating this operation are converted to floated fine powdery fragments by the rising deflected gas stream and the fine powdery fragments are carried to a solid-gas separation tank 6 by driving a fan 7 while heated to 250-450 deg.C by heated air from an inlet 5 to be precipitated and accumulated in a 10% or less moisture condition. When this powdery fragments are scattered on the surface of a waste oil, they are floated on the surface of water for a long time without being precipitated into water while impregnated with the oil and, therefore, the oil can be removed in good efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention dehydrates industrial waste, particularly waste containing fibrous materials such as clay, lime, and melk discharged from paper mills, and then finely crushes and dries the waste. The aim is to use the resulting fine powder particles as an oil adsorbent for oil removal. Machine oil, etc., is poured into drains installed in factories, etc., and it floats to the surface of the water and flows.If it flows out of the factory in this state, it contaminates the sewer system and causes pollution. It is a well-known fact that, therefore, efforts must be made to remove this oil as much as possible and drain it.

The present invention is mainly aimed at efficiently adsorbing oil that floats on the water surface of drains installed in factories, etc., or oil that has spilled onto the water surface in a wide area, and also has the property of floating on water mK while adsorbing the oil. The aim is to produce fine powder particles with a .

In the paper manufacturing process, waste containing a large amount of fibrous materials as well as inorganic substances such as clay, lime, melk, etc. is discharged, which is dehydrated, dried, and then disposed of.

The fine powder pieces used in the present invention are obtained by dehydrating the above-mentioned waste discharged in the paper manufacturing process using a conventional method, and then crushing it into fine pieces using a crushing type fluidized drying device and at the same time rapidly instant drying it. Then, moisture is removed to produce fine powder particles that have a reduced apparent specific gravity compared to their volume ratio, and that have hydrophobic properties that contain a large number of fibers.

It is well known that the above-mentioned waste forms discharged from the paper manufacturing process are currently dehydrated, dried, and then disposed of.

Normally, the dewatered waste is discharged from the dehydrator as a cake-like solid material containing about 70 grams of water. The present invention incorporates an impeller 1 for crushing and upward biased airflow generation configured as shown in FIG. A crushing fluidized fluidized dryer is provided with a fluidized fluidized dryer having a fluidized classification chamber 2 which is provided with a cake inlet 4 facing the impeller and a heated air intake 5 near the impeller.
A cake made of the dehydrated waste is charged from the cake input port 4. When this crushing type fluidized dryer is driven,
The impeller 1 for crushing and generating uneven upward airflow, which is arranged as shown in Fig. 2 and is installed in the flow classification chamber 2, is rotated in opposite directions (withinward concave or outer circumference) to generate uneven upward airflow. At the same time, the exhaust fan 4 also operates to exhaust the air in the fluidized classification chamber 2 through the solid-gas separation tank 6. 4, when the above-mentioned cake is introduced, the cake is crushed by the impeller IK, and the fragments are thrown into the fluid classification chamber by the rotary impeller 1 of the impeller.

These thrown up fragments collide with each other in the fluid classification chamber and are re-divided, and are crushed by their own weight by the impeller 1 and thrown up at the same time. The pieces of cake collide with the pieces of cake that have been tossed and thrown into the air, causing them to become even more fragmented. By repeating K in this state, the cake fragments are finally broken into fine powder particles with a diameter of 11 degrees floating in the fluid classification chamber 2 by the upward biased air flow caused by the rotation of the impeller 1. be done.

New heated air flows into the flow classification chamber 2 from the heated air intake port 5 due to the rotation of the impeller 1 for crushing and generating an upward biased air flow, and at the same time, this heated air is driven by the exhaust fan 7. As a result, an air current that always flows toward the solid-gas separation tank 6 is created.

Therefore, the fine powder particles that are crushed and suspended in the fluid classification chamber 2 are transported by this air flow KO from the fluid classification chamber 2 to the solid-gas separation tank 6 which is connected via the connecting pipe 3, and the fine powder particles are is deposited and accumulated in the solid-gas separation tank 6, and the heated air is exhausted.

The room temperature during the above-mentioned crushing operation in the fluidized classification chamber is usually around 250°C to 450°C, and the fine powder particles accumulated in the solid-gas separation tank are usually dried to a moisture content of 10% or less. Accumulated.

When this fine powder was examined under a microscope, it was found that countless ultra-fine fibrous substances contained in the fine powder were irregularly torn off and adhered to the surface of the fine powder in good condition. It turns out that 9. When we conducted an experiment in which we sprinkled this on the water surface, we found that the fine powder particles did not sink into the water, but instead floated on the surface of the water for a long time as hydrophobic fine particles. This is because the surface tension of water is high, and therefore the large number of fibers attached to the surface of fine powder pieces does not enter the water surface, and also because air is present between the fibers that are present in the fine powder pieces. However, this is thought to act as a buoyant force.

Therefore, an experiment was carried out in which oil was poured on the water surface and the fine powder particles were sprinkled on top of the oil, and the oil floating in mK of water gradually penetrated and was adsorbed by the fine powder particles. The lumps of oil-impregnated fine particles did not sink into the water, but remained impregnated with oil and floating on the water surface for a long time.

This is because the surface tension of the oil floating on the water surface is low, and it adheres to the surface of the fine particles, and then a large number of fibers enter the oil film surface, and the substances that make up the dried fine particles adsorb the oil through capillary action. However, the shape of the fine powder particles is not destroyed due to the fibrous material that adheres to the surface of the fine powder particles and the internal IC, and therefore, the air that can be used even if oil is adsorbed becomes fine particles, and the fine powder particles are It is thought that this is because it remains or adheres to the inside and outside, and this absorbs oil and gives buoyancy to the nine fine powder particles.

In this way, the fine particles impregnated with and adsorbed with oil gather together in the shape of an oil film floating on the water surface, and remain floating on the water surface.

Therefore, by scooping up this oil, the oil floating on the water surface can be removed.

The present invention aims to: 1. Rather than manufacturing an oil adsorbent with the above-mentioned properties by processing various materials, we will utilize the properties of the above-mentioned materials produced in the waste treatment process as an oil adsorbent. This is a useful invention.

[Brief explanation of the drawing]

Figure 1 is a plan view of an impeller for crushing and generating uneven upward air flow installed in the flow classification chamber. Figure 2 is a schematic diagram showing the configuration of a crushing fluidized fluid dryer. 1 is an impeller for crushing and generating an upward biased air flow, 2 is a fluid classification chamber, 3 is a connecting pipe, 4 is a cake input port, 5 is a heated air intake port, Six companies have solid-gas separation tanks, and seven have exhaust fans. Figure 1 Figure 2

Claims (1)

[Claims] Sludge containing clay, lime, talc, and other fibrous materials is dehydrated and then finely crushed using a crushing type fluidized dryer as detailed in the text at a high temperature of 250°C to 450°C. Moisture composed of fibers 10-
A method of sprinkling the following fine powder pieces onto the surface of waste oil to absorb the oil and turn it into oil lumps.