KR102338987B1 - Manufacturing method of liquid active carbon by use of unreacted carbon - Google Patents

Abstract

The present invention relates to a method for manufacturing liquid activated carbon using unreacted carbon. More specifically, the present invention is to provide a method for manufacturing liquid activated carbon which is manufactured by mixing 3 to 11 wt% of powdered activated carbon selected from unreacted carbon, a by-product of petrochemical process, and 89 to 97 wt% of water, so that the mixture is stored in a storage tank while transported in a tank lorry, and then pumped with a motor to automatically spray through a supply pipe. It is also possible to prevent leakage of powdered activated carbon during storage and transportation, and pollution of workers and working environment due to scattering of powdered activated carbon can be completely prevented during automatic spraying. And, in order to achieve the above object, the present invention, in a method for manufacturing liquid activated carbon using unreacted carbon manufactured by screening unreacted carbon with powdered activated carbon, in which unreacted carbon has a carbon content of 93.5 to 97 wt%, an ash content of 3 to 6.5 wt%, and a particle size of 1 to 50 ㎛ among by-products in a petrochemical process, provides the method for manufacturing liquid activated carbon using unreacted carbon, characterized in that the liquid activated carbon is manufactured by composition of 3 to 11 wt% of the powdered activated carbon and 89 to 97 wt% of water. The present invention configured as described above can manufacture, transport, store, and automatically spray liquid activated carbon in an airtight state, and from the same it is possible to significantly improve the working environment of the worker, and at the same time to fundamentally block environmental pollution, as well as provide effects such as greatly improving water purification efficiency and work productivity.

Description

Manufacturing method of liquid activated carbon using unreacted carbon

The present invention relates to a method for producing liquid activated carbon using unreacted carbon, and more particularly, using unreacted carbon prepared by selecting powdered activated carbon from unreacted carbon, which is a by-product of a petrochemical process, and mixing it with water in a certain ratio. It relates to a method for manufacturing liquid activated carbon.

In general, activated carbon is a porous carbon material with a strong adsorption property due to a developed pore structure, and ash, charcoal, lignite, peat, etc. generated during combustion of solid inorganic materials or organic materials are carbonized with an activator, or charcoal is converted to steam. produced by activation.

Raw materials mainly used to manufacture such activated carbon include coconut, coal, wood, ligrin, and the like, and the most famous is coconut shell activated carbon made from the bark of a coconut tree with the most developed pore structure.

In addition, activated carbon is classified into powder activated carbon, fibrous activated carbon, granular activated carbon, etc. according to the powder state and particle state, and is used for deodorization, decolorization, and adsorption and removal of contaminants such as organic compounds.

However, among the currently produced activated carbons, activated carbon using solid inorganic materials such as coal or peat as a raw material has a problem in that the raw material must be mined. Coconut activated carbon is the main

Since natural coconut shells, which are raw materials, must be imported from abroad, there are problems such as difficulty in securing, burden of transportation costs, and outflow of foreign currency.

Therefore, due to this problem, the price of the raw material is cheap, and the supply is easy, and the development of an alternative raw material having a performance comparable to that of the currently produced activated carbon is urgently emerging.

On the other hand, carbon material, which is a material of activated carbon, is generated as a by-product during operation of a petrochemical process for producing basic raw materials for petrochemical products, and the most representative example of such a by-product is unreacted carbon.

Here, if the unreacted carbon is described in more detail, the unreacted carbon is partially oxidized by using a boiler (steam) and an oxygen preheater in a gasification reactor to partially oxidize bunker oil and crude-oil to syngas (Co). +H ₂ ) It is a by-product generated when 1 to 2% is produced, or when bunker oil and other oils are used as fuel and burned in a combustion chamber.

As such, unreacted carbon generated in the petrochemical process consists of components such as carbon powder and ash, and is a good quality raw material suitable for activated carbon. It is making it happen.

The applicant of the present invention proposed a method and apparatus for manufacturing powdered activated carbon from unreacted carbon generated during a petrochemical process in Patent Registration No. 0364984 (Method and Manufacturing Equipment for Powdered Activated Carbon), and Patent Registration No. 0699455 (name; The criteria for selecting raw materials for powdered activated carbon from unreacted carbon in the active carbon raw material substitution using by-products of petrochemical processes were presented.

On the other hand, when powdered activated carbon selected from unreacted carbon generated during the petrochemical process is used as it is, it easily leaks during packaging, storage, and transportation, and is heavily scattered even when spraying manually by the operator, contaminating the worker and the working environment, while contaminating the working environment in a wide range of environments. There is a fatal problem in use, such as causing contamination and remarkably lowering the water purification efficiency because light powder particles are suspended on the waste water surface by surface tension and do not settle.

Conventionally, by increasing the moisture content of the powdered activated carbon through a hydrolysis process to make the weight of the powdered activated carbon heavier, the leakage and scattering of the powdered activated carbon is reduced, and the sedimentation rate of the powdered activated carbon sprayed into the wastewater is increased to improve the water purification efficiency. are trying

However, even if the moisture content of the powdered activated carbon is increased, it still leaks during storage and transportation in the packaging state, contaminating the worker and the working environment. Instead, the environment around the workplace is exposed as it is, creating a poor working environment that workers avoid.

The present applicant puts it in a tank lorry through a connection pipe through a connection pipe from the manufacturer's manufacturing tank, and then puts it back in a storage tank at the work site and then pumps it with a motor to automatically spray through the supply pipe. We would like to propose a method for manufacturing liquid activated carbon that can completely block the leakage of carbon dioxide and completely prevent contamination of workers and workplaces by scattering of powdered activated carbon during automatic spraying.

Registered Patent Publication No. 10-1982529 (Method for manufacturing liquid activated carbon for soil injection) Registered Patent Publication No. 10-0699455 (Replacement of activated carbon raw materials using by-products of petrochemical processes)

In order to improve the problems of the prior art, the present invention mixes 3 to 11 wt% of powdered activated carbon selected from unreacted carbon, a by-product of a petrochemical process, and 89 to 97 wt% of water, and transports it in a tank lorry. It is stored in a storage tank and then pumped with a motor to enable automatic spraying through the supply pipe. During storage and transportation, it is possible to completely block the leakage or scattering of the powdered activated carbon. An object of the present invention is to provide a method for manufacturing liquid activated carbon using unreacted carbon, which is configured to completely prevent contamination.

In order to achieve the above object, the present invention selects unreacted carbon having a carbon content of 93.5 to 97wt%, an ash content of 3 to 6.5wt%, and a particle size of 1 to 50㎛ among by-products in a petrochemical process as powdered activated carbon. In the manufacturing method of liquid activated carbon using the produced unreacted carbon, to provide a method for manufacturing liquid activated carbon using unreacted carbon, characterized in that it is prepared by composition of 3 to 11 wt% of the powdered activated carbon and 89 to 97 wt% of water do.

The present invention configured as described above makes it possible to manufacture, transport, store, and automatically spray liquid activated carbon in an airtight state, and from this, it is possible to significantly improve the working environment of workers, and at the same time to fundamentally block environmental pollution as well as water purification. It provides effects such as greatly improving efficiency and work productivity.

Hereinafter, the present invention will be described in detail through preferred embodiments.

In the present invention, only unreacted carbon having a carbon content of 93.5 to 97wt%, an ash content of 3 to 6.5wt%, and a particle size of 1 to 50㎛ among unreacted carbon, which is a by-product in the petrochemical process, is selected and used as powdered activated carbon. .

At this time, the powdered activated carbon using the unreacted carbon has a high carbon content and low ash content, and very fine pores are formed, so it is perfectly suitable as a raw material for activated carbon. It has the ability to adsorb/remove substances.

However, powdered activated carbon is easily exposed during storage or transportation and pollutes the surroundings. There is a fatal problem in that the dissolution rate (hydrophilicity) is remarkably decreased and the adsorption efficiency is lowered because it is suspended on the water surface of the wastewater as it is and cannot settle.

Therefore, the liquid activated carbon according to the present invention was developed to improve the problems in use of the powdered activated carbon as described above, and is configured to be manufactured by mixing powdered activated carbon and water in a predetermined weight ratio.

At this time, the liquid activated carbon according to the present invention is configured to be prepared by mixing at a mixing ratio of 3 to 11 wt% of powdered activated carbon and 89 to 97 wt% of water. There is a problem that the decolorization effect and the COD removal power by adsorption precipitation are significantly lowered.

And, when the powdered activated carbon is mixed in excess of 11 wt% in the liquid activated carbon according to the present invention, as the particles of the powdered activated carbon are adhered to each other by strong attractive force, the fluidity of the liquid activated carbon is significantly reduced like a gel state, and eventually the supply pipe There is a fatal problem in use that makes pumping and spraying impossible.

[Experimental Example 1] Sewage wastewater treatment experiment

After dividing the sewage wastewater (raw water) collected at the Saenggok Office of the Busan Environmental Management Corporation, located at 88 Saenggoksandan-ro, Gangseo-gu, Busan, into 6 tanks each by 350ml, each liquid activated carbon of Examples 1 to 4 and Comparative Examples 1 and 2 The raw water was treated by injecting 50 ml each into six tanks containing raw water.

The performance tests of adsorption by each liquid activated carbon of Examples 1 to 4 and Comparative Examples 1 and 2 were conducted in the same manner at room temperature to suppress the change in the properties of raw water contained in six water tanks.

At this time, 50 ml of each liquid activated carbon of Examples 1 to 4 and Comparative Examples 1 and 2 was put into 6 water tanks each containing 350 ml of raw water measured at chromaticity 694 and COD 931 ppm, respectively, and then, a Jar Tester (Jar Tester) ) was stirred for 20 minutes, and then left still for 25 minutes, and then the chromaticity and COD (ppm) were measured using the supernatant of each water tank as a sample for analysis, and the treatment results shown in Table 1 below were obtained.

Comparison of raw water treatment results of each liquid activated carbon according to the content (wt%) of powdered activated carbon enemy Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Comparative Example 2 Liquid activated carbon used for treatment
- powder activated carbon
2wt% of liquid activated carbon powder activated carbon
3t% of liquid activated carbon powder activated carbon
7wt% of liquid activated carbon powder activated carbon
9wt% of liquid activated carbon powder activated carbon
11wt% of liquid activated carbon powder activated carbon
12wt% of liquid activated carbon chromaticity 694 648 462 246 138 116 106 COD (ppm) 931 903 747 635 579 548 533

water tank condition

Table 1 shows the results of treatment of raw water by each liquid activated carbon according to the content (wt%) of the powdered activated carbon.

Here, looking at Table 1, Comparative Example 1 lowered the chromaticity of the raw water from 694 to 648 by treating the raw water with 2wt% of liquid activated carbon of powdered activated carbon, and lowering the COD from 931ppm to 903ppm, resulting in a low chromaticity of 6.6% and COD 4% Although the treatment efficiency was shown, Example 1 treated raw water with liquid activated carbon containing 3 wt% of powdered activated carbon to lower the chromaticity of the raw water from 694 to 462 and lowered the COD from 931 ppm to 747 ppm, thereby significantly improving chromaticity 33.4% and COD 19.8% The treatment efficiency was shown.

At this time, comparing Comparative Example 1 and Example 1, as can be seen from the state of the raw water in the tank in Table 1, in Comparative Example 1, the adsorption effect by the powdered activated carbon was low, so the raw water in the tank was different compared to the original raw water. Although there seems to be no difference, in Example 1, the discoloration effect and COD removal effect of raw water by adsorption of powdered activated carbon were significantly improved compared to Comparative Example 1, indicating a clearer state of the raw water of the tank unlike the raw water of the tank of Comparative Example 1. could confirm that there was

As a result, it was confirmed that the liquid activated carbon of 2 wt% of powder activated carbon as in Comparative Example 1 was not practical because the chromaticity and COD treatment efficiency for raw water were low, and the normal adsorption performance as activated carbon was not expressed, whereas Example 1 Liquid activated carbon of 3wt% of powdered activated carbon as shown in Fig. 1 has significantly higher chromaticity and COD treatment efficiency for raw water than Comparative Example 1, and exhibits normal adsorption performance, thereby demonstrating its practicality as activated carbon.

Further, looking at Examples 2 to 5 and Comparative Example 2 in Table 1, as the content of powdered activated carbon in the liquid activated carbon for treating raw water increased to 7 wt%, 9 wt%, 11 wt%, 12 wt%, It can be seen that the chromaticity and COD treatment efficiency are gradually improved to 64.5%/31.8%, 80.1%/37.8%, 83.3%/41.1%, 84.7%/42.7%, and from this, the liquid activated carbon according to the present invention is the It was confirmed that the color and COD treatment efficiency of raw water as activated carbon were significantly improved as the content of powdered activated carbon increased when the content was 3 wt% or more.

[Experimental Example 2] Viscosity test of liquid activated carbon

Viscosity comparison of liquid activated carbon according to the content of powdered activated carbon liquid activated carbon Viscosity flat state inclined state


powder activated carbon
Liquid activated carbon containing 9wt%




4

powder activated carbon
Liquid activated carbon containing 11wt%




7

powder activated carbon
Liquid activated carbon containing 12wt%




10

In Experimental Example 2 for liquid activated carbon according to the present invention, the viscosity of pure water was 0, and when the liquid activated carbon mixed with water and powdered activated carbon reached a gel state, the viscosity was evaluated as 10, and the content of powdered activated carbon (wt %), the viscosity of the liquid activated carbon is indicated as shown in Table 2 above.

Table 2 describes the change in viscosity of liquid activated carbon according to the content of powdered activated carbon. After scooping 1 tablespoon of each liquid activated carbon with different contents of powdered activated carbon on A4 paper and placing them on the A4 paper, the flat state and hardness of the A4 paper While maintaining the photographic state, the viscosity of the liquid activated carbon was observed.

At this time, liquid activated carbon containing 9wt% of powdered activated carbon is a liquid with a viscosity of 4, and immediately spreads widely along the flat side of A4 paper as soon as it is scooped with a spoon, and even if the A4 paper is made to have an inclination angle of 5° or less, As shown in Fig. 2, it can be seen that it flows down easily along the slope, and in the fluidity of this viscosity, pumping and spraying of the motor through the supply pipe is possible.

In addition, liquid activated carbon containing 11wt% of powdered activated carbon is a liquid with a viscosity of 7, and when it is scooped up with a spoon, it gradually spreads along the flat side of A4 paper in all directions, and when the A4 paper is made to form an inclination angle of 20° or more, it is shown in Table 2 above. As such, it flows down gradually along the slope, and although the load on the motor is somewhat increased in the fluidity of this viscosity, the pumping and spraying of the motor through the supply pipe is possible without unreasonableness.

However, the liquid activated carbon containing 12wt% of powdered activated carbon, which is Comparative Example 2 in Table 1, is in a gel state with a viscosity of 10. Even when A4 paper is made to have an inclination angle of 45° or more, it is in a fixed state that hardly flows down the steep slope as shown in Table 2 above.

In particular, liquid activated carbon containing powdered activated carbon becomes entangled with each other as the amount of powdered activated carbon reaches 12 wt% as shown in Comparative Example 2 of Table 1, and the attractive force between particles of powdered activated carbon rapidly increases, thereby forming a gel state. The viscosity reaches 10.

As such, when the liquid activated carbon reaches a gel-like viscosity of 10 by the powdered activated carbon, it is possible to manually scoop and spray using a tool such as a shovel. Since it cannot be transferred, it cannot be transported to the site, and in the end, Comparative Example 2 itself has no utility or practicality as liquid activated carbon.

In short, through Experimental Example 1 and Table 1, it can be confirmed that the liquid activated carbon of 2wt% of powdered activated carbon as in Comparative Example 1 has too low chromaticity and COD treatment efficiency for raw water, so that its practicality as activated carbon is not practical. As in Examples 1 to 4 and Comparative Example 2, liquid activated carbon containing 3 wt% or more of powdered activated carbon had significantly higher chromaticity and COD treatment efficiency for raw water compared to Comparative Example 1, and exhibited normal adsorption performance, which was sufficient as activated carbon. Practicality has been proven.

However, through Experimental Example 2 and Table 2, when the liquid activated carbon as in Comparative Example 2 contains more than 12 wt% of the powdered activated carbon, the attractive force between the particles of the powdered activated carbon rapidly increases and becomes entangled with each other. It was confirmed that a gel state that lost fluidity was achieved due to viscosity, and from this, liquid activated carbon containing more than 12wt% of powdered activated carbon showed excellent chromaticity and COD treatment efficiency for raw water as shown in Comparative Example 2 in Table 1 above. And as shown in the photo in Table 2, it was found that the liquid activated carbon had no utility or practicality at all because it was in a gel state with a viscosity of 10 and pumping by a motor was impossible.

In short, the liquid activated carbon according to the present invention is transported in a tank lorry by pumping the motor from the manufacturing tank, stored in a storage tank on site, and then pumped with a motor and automatically sprayed through the supply pipe, and manufactured from it Its technical features are that it can completely block the leakage of activated carbon during transport and storage, and provides an action effect that can fundamentally prevent contamination of workers and the working environment by scattering of powdered activated carbon during automatic spraying.

As such, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention.

Therefore, it is natural that the practical scope of the present invention should not be limited by the above-described embodiments, and should be defined by not only the claims to be described later, but also by the constitutions equivalent to the claims.

Claims (1)

Liquid activated carbon using unreacted carbon that is manufactured by selecting powdered activated carbon with a carbon content of 93.5~97wt%, an ash content of 3~6.5wt%, and a particle size of 1~50㎛ among by-products in the petrochemical process. In the manufacturing method,
A method for producing liquid activated carbon using unreacted carbon, characterized in that it is prepared by composition of 3 to 11 wt% of the powdered activated carbon and 89 to 97 wt% of water.