KR870001750B1 - Filtering material for treating industrial waste water - Google Patents

Abstract

Compsns. for prepg. filtering material(lump type) comprise 10-15 wt.% of coke powder, 70-80 wt.% of activated charcoal and 10-15 wt.% of anthracite. Wt. ratio of coke powder to anthracite is 1:1; activated charcoal bonds with coke powder (as nuclei particle), and anthracite bonds with interface between coke powder and activated charcoal. The process comprise (i) mixing halfamts. of charcoal, coke powder and caking coal, heat; (ii) mixing after addn. of remaining charcoal anthracite and caking coal; and (iii) pressing by 20-30 kg/cm2 for lump filtering material.

Description

Filter for Industrial Wastewater Treatment

A graph showing the cyan removal rate according to the activated carbon composition of the filter medium according to the production method of the present invention.

The present invention relates to a filter agent for industrial wastewater treatment. In general, industrial wastewater is purified by a biochemical method. Before the biochemical treatment, a pretreatment is performed in which a pollutant is adsorbed and removed using a filter agent such as Coke or activated carbon. However, in the case of lump coke, the removal area of pollutants is low because of the small surface area that adsorbs pollutants and activated carbon has higher removal rate of pollutants than lump coke. It is not easy to increase.

Therefore, in the conventional method of filtration with activated carbon, it is inevitable to expand the filtration system as the amount of wastewater increases.

In view of the above problems, the present invention provides a filter medium having good adsorption and removal rate of pollutants and easy control of the filtration treatment rate.

The filter agent of the present invention is 10-50% by weight of Coke Powder, 70-80% by weight, 10-15% by weight of Anthra cite, and the ratio of Buncoke and anthracite is in a weight ratio of 1: 1. It is characterized in that the activated carbon is bonded to the outside of the powdered coke as a nucleus particle and pseudoparticles formed by coupling the anthracite coal to the space portion of the binding interface between the powdered coke and the activated carbon are formed in a block form.

When introducing the method for producing a filter of the present invention as described above is as follows. First, 1/2 of the required amount of activated carbon is mixed with the heated coke and heated, and then coal-based caking additive (Soft pitch) is added to assemble the primary mixture.

The heating temperature is a softening point of the coal-based binder added during the preparation of the filter agent is 100-200 ℃, when the heating temperature is below the softening point, the binder is solidified and difficult to assemble, the softening point of the binder is above.

Secondary granulation is performed by adding and mixing anthracite coal to the first granulated particles, and adding and mixing the remaining activated carbon (half of the total amount) and a binder to the second granulated particles, and finally granulating them.

The granulated particles are pressurized at a pressure of 20-30 kg / cm 2, cooled to room temperature, formed into large chunks, and then cut to a certain size. The coal binder is a softening point of 100-120 ℃ using the addition amount is 0.5-1 parts by weight based on 100 parts by weight of the filter medium. In the case of a binder having a softening point of 100 ° C. or less, it is difficult to maintain the strength of the filter medium due to waste water temperature (usually 40 ° or more). If the binder is 120 ° C. or more, it is easily cracked and granulated after the filter agent is prepared. On the other hand, when the amount of the caking additive added is 0.5 parts by weight or more, granulation is difficult, and when 1 part by weight or more, the adsorption capacity of the filter agent is lowered.

The figure shows the result of treating the wastewater with the filter medium prepared by the above manufacturing method while changing the composition ratio of activated carbon, and showing the result of cyan removal rate, which shows that the removal rate is improved when the particle size of activated carbon is fine, but regardless of particle size, the activated carbon is 70-80% by weight. It shows that the removal rate is maximum.

On the other hand, the table below shows the petroleum gas wastewater, liquefied gas produced during coke production, using the filter medium of the present invention having 70% by weight of activated carbon and the conventional activated carbon having a particle size of 95% or more of 2 mm, respectively. As a result of filtration for 1 hour at a flow rate of H, it can be seen that the removal rate of pollutants in the waste water is significantly increased by using the filter agent of the present invention.

As described above, the filter agent of the present invention can be arbitrarily controlled to adjust the particle size by controlling the size of the wastewater, thereby controlling the filtration rate of the wastewater and the resistance of the filtered water. Thus, the workability of wastewater treatment is good, and the removal rate of pollutants is conventional activated carbon. Significant increase compared to that can reduce the purification treatment in the subsequent chemical treatment process.

In addition, the filter agent of the present invention has the advantage that it can be applied to the waste water containing a variety of components of the pollutant by being able to be used by mixing the components with different adsorption properties to each other.

Claims (1)

Coke 10-15% by weight, activated carbon 70-80% by weight, anthracite 10-15% by weight, powder coke and anthracite are in a weight ratio of 1: 1. The filter agent for industrial wastewater treatment, characterized in that the coarse particles formed by coupling the anthracite coal to the space portion of the bonding interface of the powdered coke and activated carbon.

Images