KR100833350B1 - Waste disposal apparatus using chemical agents for preventing eruption of a toxic substance - Google Patents

Abstract

The present invention discloses physical and chemical treatment of pollutants (waste) generated in large quantities such as purified water sludge, sewage sludge, food waste, waste paint, PCBs-containing insulating oil, and oil-contaminated soils, thereby preventing the release of harmful substances and efficiently It relates to a treatment apparatus and a treatment method for recycling. This treatment method is an environmentally friendly method that does not harm the human body at all. The mixture is added to the mixer at a ratio, and the waste and the dissolution inhibitor materials are uniformly mixed and stirred in the kiln mixer to react with the moisture contained therein or the added moisture to evaporate the first exothermic reaction. Subsequently, the fatty acid and the surfactant coated on the coated quicklime are separated by the first exothermic reaction heat and react with harmful substances such as oil. It is dried. In this way, waste can be processed quickly and in bulk, physically and chemically safely, and the end product can be recycled in various ways.

Description

Waste Disposal Equipment Using Hazardous Substance Elution Agent {WASTE DISPOSAL APPARATUS USING CHEMICAL AGENTS FOR PREVENTING ERUPTION OF A TOXIC SUBSTANCE}

Detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which numerals designate corresponding parts in the drawings.

1 is an overall configuration diagram of a waste treatment apparatus according to the present invention,

2 is an internal configuration diagram showing in detail the structure of the grinder in FIG.

3 is a cross-sectional view taken along line A-A of FIG.

4 is a left side view of the kiln mixer shown in FIG.

FIG. 5 is a right side view of the kiln mixer shown in FIG.

FIG. 6 is a cross-sectional view taken along line D-D of FIG. 1;

7 is a perspective view showing in detail the structure of the triangular screw shown in FIG.

** Explanation of symbols for main parts of drawings **

100: material supply unit 110, 120, 130, 132, 134: silo

140: supply screw conveyor 150: support

160: grinder 170: screw input conveyor

200: mixing processing unit 210: kiln body

220: support 230: kiln driving means

240: control panel 250: triangular mixing screw

260 screw driving means

The present invention relates to an apparatus and a method for treating waste, and more particularly, to food waste, paint by-products, PCBs containing insulating oil or oil-contaminated soil, water purification sludge and sewage treatment sludge, and the like. The present invention relates to a waste treatment apparatus and a method for treating the same, which use a toxic substance leaching inhibitor that prevents the elution of a substance and treats it as a by-product that can be physically and chemically dried and recycled.

Recently, as the law on the treatment of sludge and waste is strengthened, the disposal of these materials in the treatment plant and the ocean is strictly regulated. In particular, since these substances contain more than 80% of moisture, when they are buried in landfills, they can leach out of these substances and cause secondary pollution. There is a risk of disrupting the ecosystem.

In order to minimize such harmful effects, landfills strictly limit the amount of water contained in the sludge and the elution of harmful substances. In the case of ocean dumping, legislation prohibiting ocean dumping has been passed in stages since 2007, and sewage sludge from 2008 has been passed. Therefore, it is no longer the way of landfilling or dumping waste into land, but it is time to find a more environmental alternative. However, the amount of food waste is gradually increasing, and yet no appropriate treatment method has been developed to solve it.

On the other hand, conventional devices for treating a large amount of waste, such as water purification sludge, sewage sludge, food waste, waste paint, insulating oil containing PCBs, oil contaminated soil, can be largely divided into manual (batch) and automatic. In the manual method, sludge and treatment chemicals are put in a reaction tank and stirred for about 30 minutes, and when the reaction is completed, the by-products of the reaction tank are transferred to another container. Is not suitable. On the other hand, the automatic type is a transfer screw installed in the reaction tank to mix two or more kinds of materials to transfer to another reaction tank, the reactivity is not good, but can be processed in large quantities is suitable for the treatment of sludge. In other words, waste such as sludge contains chemicals such as oil and inorganic flocculant, so that it is not easily mixed with other chemicals. Therefore, in order to treat a large amount of sludge uniformly, there is a great need for designing a more efficient mixing method and such a device. It is becoming.

Accordingly, an object of the present invention is to devise to solve the above-mentioned problems, and after uniformly inputting a certain amount of quicklime (CaO), coated quicklime, ferrous sulfate, water glass, etc. to waste such as purified sludge, sewage sludge, food waste, etc. Hazardous substances that can be used as a cover material, cement raw material, calcareous fertilizer, etc. in waste landfills are treated with powder containing 20% or less of moisture. The present invention provides a waste treatment apparatus using a substance dissolution inhibitor.

Another object of the present invention is to provide a waste disposal method capable of quickly and effectively treating waste by the waste disposal apparatus.

Waste treatment apparatus using a hazardous substance dissolution inhibitor according to an embodiment of the present invention for achieving the above object is a material supply for supplying a treatment agent to prevent the elution of harmful substances from the waste and the waste at a mixing ratio set by the user Device section; And a mixing treatment unit for mixing and stirring the mixing ratio of the waste supplied from the material supplying unit and the treatment agent to prevent the elution of harmful substances contained in the waste, and to dry and discharge the mixed powder.

Waste treatment apparatus using a harmful substance dissolution inhibitor according to another embodiment of the present invention for achieving the above object is a material for supplying a treatment agent to prevent the dissolution of harmful substances in the waste and the waste to dry at a mixing ratio set by the user Supply unit; And a mixing treatment unit for mixing and mixing the mixing ratio of the waste supplied from the material supply unit and the treatment agent to prevent elution of harmful substances contained in the waste, and to discharge the dried powder to dry powder. Of the treated material consisting of quicklime (CaO), coated quicklime coated with surfactant and fatty acid, water glass, ferrous sulfate, and water except for quicklime and quicklime A feed screw for transferring the waste and the treatment agent introduced at a specific mixing ratio by the treatment agent into which the at least one selected is selected according to the input amount set by the user, and between the object and the treatment agent to the mixing treatment unit. It is characterized by including a conveyor.

Waste treatment method using a harmful substance dissolution inhibitor according to an embodiment of the present invention for achieving the above another object is a) quicklime (CaO) to the waste, coated quicklime coated with a surfactant and fatty acid, water glass, ferrous sulfate, water Continuously adding one or more selected from the other materials except the quicklime and the quicklime to be mixed at a predetermined mixing ratio; b) pulverizing the input waste and the treatment agent; And c) mixing and stirring the pulverized waste and the treating agent to dry while preventing elution of contaminants contained in the waste.

Waste treatment method using a harmful substance dissolution inhibitor according to another embodiment of the present invention for achieving the other object comprises the steps of spraying water while adding a treatment agent of quicklime, coated quicklime coated with a surfactant and fatty acid and water glass; Injecting waste paint into the kiln mixer while simultaneously introducing waste water into the kiln mixer, and mixing and stirring waste paint and the treatment agent in the kiln mixer to obtain a dry powder; And separating the organic solvent and the water evaporated during the treatment of the waste paint in the kiln mixer by connecting the external condenser to the outlet through water and the organic solvent.

Waste treatment method using a harmful substance dissolution inhibitor according to another embodiment of the present invention for achieving the above another object is spraying water while adding a quicklime, a coating quicklime coated with a surfactant and fatty acid, water glass and ferrous sulfate treatment agent Doing; Injecting the water-containing treatment agent into the kiln mixer while simultaneously injecting the PCBs-containing insulating oil, and mixing and stirring the PCBs-containing insulating oil and the treatment agent in the kiln mixer to obtain a dry powder; And separating the organic solvent and water evaporated during the treatment of the insulating oil in the kiln mixer with water and the organic solvent by connecting an external condenser to the outlet through a pipe.

The present invention is to process a variety of waste, and to be processed in a state that can be recycled without toxic substances from the treated material.

The above dissolution inhibitors are based on quicklime (CaO), quicklime coated with a surfactant and fatty acid (hereinafter referred to as 'coated quicklime'), water glass, ferrous sulfate, and quicklime in water, and at least one of the remaining substances. Selected and mixed. In addition, a surfactant may be added to improve reactivity. As a surfactant, it is preferable that a terminal group has a polar group as an oil-soluble dispersing agent which melt | dissolves in an oil component, and Specifically, BYK Chemie's Disperplast-1150 (BYK-1150) product was applied to this invention. Fatty acid, which is readily available and inexpensive, is preferred. Such dissolution inhibitor materials are treatment chemicals for treating various wastes, hereinafter referred to as 'treatment agents'.

In addition, the wastes to be treated in the present invention (hereinafter referred to as 'treatment') are purified sludge, sewage sludge, food by-products, waste paint, and insulating oil containing PCBs.

The core of the present invention is to continuously supply materials, such as the processing object and the processing agent, according to the optimum mixing ratio set by the user, and to uniformly mix the supplied materials so that the processing agent can effectively react to the processing object. To provide means and methods for this.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall configuration diagram of a waste treatment apparatus according to the present invention.

The waste treatment apparatus using the harmful substance leaching agent of the present invention is a material supply device 100 for supplying a large amount of waste (treatment) such as sludge and a treatment chemical (treatment) for treating such waste at an appropriate mixing ratio; When the waste and the treatment agent are supplied from the material supply device unit 100 at an appropriate mixing ratio, the waste material may be divided into the mixing processing unit 200 for treating and discharging them in a recyclable state while mixing and stirring them. Now, each device unit will be described in detail.

1. Material supply unit 100

In order to achieve the object of the present invention in the present invention, as shown in FIG. 1, a silo 110 to store waste such as sludge, which is a target to be treated, and a chemical agent (treatment agent) for treating an object. ), Such as quicklime (CaO), coated quicklime (CaO), water glass, ferrous sulfate, etc., with treatment agents 120, 130, 132, 134. Sludge and quicklime (CaO) are the most input materials, especially sludge contains about 80% of the water has a disadvantage that it is not free to transport in the storage tank. In order to compensate for these disadvantages, the present invention installs a transfer screw 114 in the tank 112 of the object 110 between the workpieces so that the sludge is constantly and smoothly supplied. On the other hand, quicklime (CaO) tends to harden due to the influence of moisture in the outside air and moisture introduced from the reaction part, thereby preventing the free fall to the outlet portion between the treatment agents 120, so that the transfer in the correct amount may not be possible. have. Therefore, the supply of quantitative supply is carried out by mounting the transfer screw 124 for inducing uniform transfer in the tank 122, similarly between the treatment agent 120 storing the quicklime (CaO) and the processed object storing the sludge 110. Make it smooth. The components mounted on top of the tanks 112 and 122 of the passage 110 between the treatment object 110 and the treatment agent 120 are screw driving motors 116 and 126 for driving the respective transfer screws 114 and 124.

In the present invention, there are also provisions 130, 132 and 134 for supplying other treatment agents such as coated quicklime, iron sulfate, water glass and the like other than quicklime. These other processing agent lines (130, 132, 134) is a small amount of the coated quicklime (CaO), iron sulfate, water glass supplied and is not affected by the outside air, so it is possible to supply a fixed amount by freely falling in the path without installing a screw. . Among these other treatments, the number may increase or decrease depending on the number of treatments.

Above the paths 110, 120, 130, 132, 134 are installed vertically, the lower end of the outlet is formed, respectively, the supply screw conveyor 140 is connected to these outlets. The feed screw conveyor 140 is horizontally supported by the support frame 150 and is connected to the bottom outlet of the paths 110, 120, 130, 132, and 134, and the transfer container 142 into which the to-be-processed object and the treatment agent are dropped from the paths 110, 120, 130, 132, and 134 are introduced. And a supply screw 144 for rotating the workpiece and the processing agent transferred from the paths 110, 120, 130, 132, and 134 while rotating in the transfer container 142, and the supply screw 144. A drive motor 146 that rotates is provided.

Sludge, quicklime (CaO), coated quicklime (CaO), ferrous sulfate, and water glass which are quantitatively transferred through the feed screw conveyor 140 are sent to the grinder 160 connected to the discharge end of the feed screw conveyor 140. . The grinder 160 has its outer cylinder 162 vertically connected to the lower side of the feed cylinder 142 of the feed screw conveyor 140, and the materials transferred from the feed screw conveyor 140 through impellers installed therein. Finely crushed and exported. In particular, among the materials are viscous sludge and quicklime aggregated by moisture, the pulverizer 160 is finely pulverized them to make the mixing and stirring in the post process well. The crushed materials are introduced into the mixing treatment unit 200 by the screw input conveyor (170). Between the grinder 160 and the input screw conveyor 170, a guide plate 180 for guiding the material output from the outlet of the grinder 160 to flow smoothly to the inlet of the input screw conveyor 170 is installed.

FIG. 2 is an internal configuration diagram showing the structure of the grinder in FIG. 1 in detail, and FIG. 3 is a cross-sectional view taken along line A-A of FIG. The structure and operation of the grinder will be described in more detail with reference to these drawings.

As described above, the grinder 160 has its outer cylinder 162 vertically connected to the lower side of the transfer cylinder 142 of the supply screw conveyor 140, and has a circumference therein as shown in FIGS. Rotating shafts 164a to 164c are installed vertically at right angles along the direction, and impellers 166a to 166c are fixed to the rotary shafts 164a to 164c at equal intervals. Preferably, the rotating shafts 164a to 164c are disposed at positions corresponding to the vertices of the equilateral triangle by being disposed at intervals of 120 degrees in the circumferential direction, and the impellers (up and down) disposed on each of the rotating shafts 164a to 164c. 166a-166c are arrange | positioned so that it may not collide with an adjacent impeller. Materials fed to the grinder 160 from the feed screw conveyor (workpiece and processing agent) are fed to the center of the three impellers 166a to 166c in plan view, and the impellers 166a to 166c arranged up and down. It is crushed while passing through Of course, the driving motors (168a to 168c) are connected to the rotating shaft (164a ~ 164c) is rotated by receiving power. The grinder 160 exemplified in this embodiment has three rotating shafts equipped with impellers at an equiangular interval (120 degrees apart) along the circumferential direction, but two or four rotating shafts equipped with impellers are installed at an equilibrium. It is also possible to configure.

In this way, the apparatus allows each material to be pulverized through the grinder 160 before being introduced into the kiln mixer 200 of the mixing processing unit, which will be described later, and then introduced into the kiln mixer 200. When entering the kiln mixer 200 directly without passing through the grinder 160, it was found that uniform mixing did not occur. Thus, by installing the grinder 160 through trial and error several times, the present invention was able to obtain a uniform mixture. The kiln type mixer 200 is excellent in continuous mixing capability, but has a disadvantage in that it is not possible to obtain a uniform mixture as compared to a discontinuous batch type. For example, when different materials are transferred to the kiln mixer 200 at 10 second intervals, a uniform mixing occurs, but the samples after 20 seconds have been discharged without being mixed with each other. However, in the present invention, since the materials having a lumped or agglomerated property are primarily pulverized and mixed through the grinder 160, the mixed materials may be uniformly mixed with each other after 20 seconds. .

Specifically, when the impellers 166a to 166c mounted on the three rotating shafts 164a to 164c in the cylindrical outer cylinder (reactor 162) are rotated at a speed of 200 rpm in order to improve the stirring and grinding ability, the three rotating shafts Each material flowing between the fields 164a-164c is completely crushed and falls down. At this time, some degree of stirring also takes place with the grinding. For about 20 seconds, the pulverized and stirred material is dropped down and dropped into the cylindrical dropping space, and at the same time, it is transferred to the kiln mixer 200 by the feeding screw conveyor 170 to be added. Looking at the material introduced into the kiln mixer 200 through the crusher 160, it can be seen that white quicklime (CaO) is uniformly dispersed in each part of the black sludge.

2. Mixing processing unit 200

4 is a left side view of the kiln mixer shown in FIG. 1 seen in the B direction, and FIG. 5 is a right side view of the kiln mixer shown in FIG. 1 seen in the C direction. 6 is a cross-sectional view taken from the line D-D of FIG. 1, and FIG. 7 is a perspective view showing in detail the structure of the triangular mixing screw shown in FIG. The kiln mixer which is the mixing processing unit is described in detail with reference to these figures and FIG. 1 as follows.

As described above, the finely ground materials to a size that can be mixed well through the grinder 160 is supplied to the kiln mixer 200 through the input screw conveyor 170. To this end, the discharge port of the input screw conveyor 170 is connected to the kiln body 210 of the kiln mixer 200. To this end, one side end of the kiln body 210 is provided with an inlet 212 connected to the discharge port of the input screw conveyor 170.

The kiln mixer 200 rotatably supports the long cylindrical kiln body 210 by the supporter 220, and is installed to be inclined so that the outlet 214 side thereof goes down. At this time, the rotation of the kiln body 210 may be clockwise or counterclockwise, and the support 220 is provided with a kiln driving means 230 to enable such rotation. The kiln driving means 230 includes a motor 232 fixed to the support 220, a reducer 234 connected to the motor 232, a drive wheel 236 connected to the reducer 234, and the drive wheel. 236 is rotated in close contact with the driven wheel 238 is fitted to the surface of the kiln body 210 is fixed. In particular, the driving wheel 236 and the driven wheel 238 may transmit power in their close contact force, or may be configured to drive the drive wheel 236 and the driven wheel 238 in gear to transfer power. Furthermore, as shown in FIG. 6, a pair of driving wheels 236 may be configured on both sides of the driven wheel 238 having a large outer diameter, and two pairs of driving wheels 236 may be driven by transmitting power. Or only one of which may be powered from the motor 232 and the other may be configured as an idler.

The kiln body 210 is, for example, a cylindrical shape having a length of 10,000 mm and a diameter of 1,000 mm, and may be designed to rotate at a maximum speed of 6 rpm by a motor 232 of 3.7 Kw. In addition, the material of the kiln body 210 is made of stainless steel (for example, SUS 304), and further inclined downward about 5 ° toward the outlet so that the material can be continuously transported naturally toward the outlet 214. It is inclined and supported by the support stand 220. In addition, the control panel 240 is provided to control the kiln body 210 to rotate clockwise or counterclockwise to improve the stirring ability.

On the inner wall of the cylindrical kiln body 210, a number of blades 216 are attached at regular intervals along the circumferential direction. If the blade 216 is not attached to the inner wall of the kiln body 210, when sludge containing 80% or more of water is introduced into the inner wall of the kiln body 210, stirring does not occur or is formed along the inner wall of the cylinder. As the spherical shape is spherically formed and discharged, the exothermic reaction is also weak and the sludge is not dried. The blades 216 attached to the inner wall of the kiln body 210 serve to prevent this phenomenon, and the present inventors have experimented with, for example, the blades 216 having a size of 150 mm on the inner wall of the kiln body 210. As a result, it was confirmed that sludge adhered to the inner wall or that the sludge was discharged in a spherical shape did not occur.

The mixing screw 250 is installed in the kiln body 210 along its axis. The mixing screw 250 is rotatably supported by a pair of left and right bearings 222a and 222b connected to both ends of the kiln body 210 and connected to the support 220 at both ends, and at one end thereof, a screw drive. The means 260 is connected to receive rotational power. The screw driving means 260 includes a motor 262 and a reducer 264 connected to the motor 262, and may transmit rotational power directly from the reducer 264 to the mixing screw 250. Alternatively, the rotational force decelerated by the reducer 264 may be transmitted to the mixing screw 250 through the intermediate member 266. The intermediate member 266 may include a driving wheel connected to the output end of the reduction gear 264, a driven wheel fixed to one end of the mixing screw 250, and a belt connecting the driving wheel and the driven wheel to transfer power. have. In another embodiment of the intermediate member 266, the drive gear is fixed to the output end of the reduction gear 264, and the driven gear is fixed to one end of the mixing screw 250 to engage the drive gear and the driven gear to transfer power. It can be done.

The mixing screw 250 is rotated at a relatively high speed compared to the kiln body 210, the rotational direction is preferable to increase the mixing stirring force to rotate in the opposite direction to the kiln body 210. . In the absence of the mixing screw 250, the sludge and quicklime (CaO) are not uniformly mixed, and white (ie, quicklime (CaO)) was found in various parts of the undried sludge. This phenomenon is caused by the exothermic reaction that occurs when quicklime (CaO) reacts with moisture contained in the sludge and becomes Ca (OH) ₂ , but the sludge should be dried. This is because a small amount of quicklime (CaO) remains in the form of white spots on each part of the sludge. In this device, the mixing screw 250 induces a complete reaction of quicklime (CaO) and sludge, thereby increasing the exothermic reaction and improving drying performance.

In the mixing screw 250, a circular screw generally has a strong role of conveying the material in one direction, but a weak mixing or grinding function of the sample. The screw was applied. Since the sludge falling from the inner wall of the cylindrical kiln body 210 has a function of crushing the sludge against the triangular blade (three corners) of the triangular rod part 252 of the screw 250, the sludge and quicklime The effect of uniformly mixing materials such as (CaO), coated quicklime (CaO), water glass, and iron sulfate is strong. Further, the triangular mixing screw 250 is formed on the surface of the triangular rod portion 252 of the triangular cross section 254 is formed along the longitudinal direction in a spiral shape while forming a circular shape along the circumferential direction, and the grinding and mixing stirring force Double

For example, the mixing screw 250 is 10,000 mm in length and is rotated at a maximum speed of 30 rpm as a motor 262 of 3.7 Kw, and furthermore, the rotation direction is clockwise to improve the dispersion and mixing of the material. It is controlled by the control panel 240 to rotate counterclockwise alternately. Furthermore, the driving control of the mixing screw 250 to be reversed to the rotating direction of the kiln body 210 further improves the mixing and stirring efficiency of the materials. At this time, the rotational speed of the mixing screw 250 is rotated to 30rpm in the case of a reaction that occurs quickly reaction and 15-20rpm in the case of a slow reaction reaction so that complete drying occurs inside the kiln body 210. do.

By the above-described structure of the blade 216 of the inner wall of the kiln body 210 and the configuration of the triangular mixing screw 250, the materials introduced into the kiln body 210 are blades 216 of the inner wall according to the rotation of the kiln body 210. The material falls so that it falls into the triangular mixing screw 250 and is more uniformly mixed while being conveyed toward the outlet 214 of the kiln body 210.

Now, the operation of the present invention will be described in detail with reference to the above-described configuration.

Water and sewage treatment plants use inorganic and polymeric flocculants to flocculate sludge suspended on water. If the sludge agglomerates and settles down, the sludge is collected and then discharged with some dehydration through a dehydrator. In this discharged sludge, since the flocculant encapsulates the sludge like cell membranes, even when heated to 110 ° C. or more, the water contained in the sludge hardly evaporates. Therefore, in order to dry the sludge using the heat of hydration of quicklime (CaO), the contact cross-sectional area of the sludge and quicklime (CaO) must be increased. The method of increasing the contact area between sludge and quicklime (CaO) discharged in the form of cake is the best method of crushing sludge into small particles and reacting with quicklime (CaO). However, the sludge contains more than 80% of the water and is in the form of a cake, so it is not easily crushed into small particles.

Accordingly, in the present apparatus, sludge, quicklime and other treating agents are transferred from the sieves 110, 120, 130, 132, and 134 through the feed screw conveyor 140 to the grinder 160. The sludge introduced in this way hits the sharp blades of the impellers 166a to 166c mounted on the rotary shafts 164a to 164c of the grinder 160 in the form of a cake. It mixes uniformly with processing agents, such as (CaO). The mixed materials are lifted by the input screw conveyor 170 and supplied into the kiln body 210 through the inlet 212 of the kiln mixer 200.

For example, when the kiln body 210 is cylindrical having a length of 10,000 mm and a diameter of 1,000 mm, and rotates at a maximum speed of 6 rpm by the 3.7 Kw motor 232, the triangular mixing screw located inside the kiln body 210 is present. The 250 is 10,000 mm in length and is driven by the 3.7 Kw motor 262 to rotate in the opposite direction to the kiln body 210 at a maximum speed of 30 rpm. Thus, the sludge is attached to the cylindrical inner wall or the sludge is discharged in a spherical shape by the blades 216 having the size of 150 mm provided on the inner wall of the kiln body 210, and the inner wall of the kiln body 210 protrudes. Sludge is loaded on the blades 216 and rotated upward to fall from a high position, so that it is possible to have a good dispersibility and uniform mixing. As the sludge is loaded upwards, the edge of the triangular mixing screw 250 is dropped ( Hitting the blade), the dispersion and mixing are further doubled. That is, the triangular mixing screw 250 is rotated quickly inside the cylinder of the kiln body 210 while sludge falling from the inner wall of the cylinder is dispersed against the triangular blade, sludge and quicklime (CaO), coated quicklime (CaO), water glass, sulfuric acid Materials such as iron are mixed more evenly. In this case, when the reaction occurs quickly, the mixing screw 250 is rotated about 30 rpm quickly, and when the reaction occurs slowly, by slowly rotating about 15-20 rpm to induce the complete drying inside the kiln body 210. In particular, by uniformly changing the rotation direction of the kiln body 210 and the mixing screw 250 from time to time to improve the uniform mixing of the material, as well as by the spiral structure of the mixing screw 250 as well as the kiln body 210 By the installation structure inclined toward the outlet 214 of the sludge and the treatment agent such as sludge and quicklime in the inside of the body 210 is mixed and reacts to proceed to the outlet 214 naturally in a dry state. In this way, the materials proceeding toward the outlet 214 reach the outlet 214 at the time of completion of the drying treatment, and the materials are discharged as powder in a completely dried state. The discharged powder has a water content of 20% or less and can be used as a cover material, a cement raw material, and a calcareous fertilizer in a landfill.

On the other hand, as the sludge is dried, water vapor and odor are generated. The water vapor can be easily solved by additionally attaching the condenser 300 to the kiln body 210. However, since the odor generated with water vapor is not easily removed, and the odor is a cause of secondary pollution and is subject to a complaint, the applicant has to go through several trials and errors to remove it. Knowing that it is the best, the odor emitted with the water vapor is solved by attaching the combustor 400 to the kiln body 210 and burning it.

With respect to the waste treatment apparatus and treatment method of the present invention described above will be described with respect to the effect thereof.

Example 1 Drying of Purified Sludge

5 tons of purified water sludge in the water treatment plant sludge 110, 1 ton of quicklime (CaO) between the treatment agent 120, and a small amount of coated quicklime (CaO) were added to the other treatment agent 130 to operate the apparatus.

The kiln body 210 was rotated at a speed of 6 rpm in the clockwise direction without the initial starting material was added, and the triangular mixing screw 250 therein was rotated at a speed of 30 rpm in the counterclockwise direction. After confirming that all the devices are operating normally, the supply screw conveyor 140 and the input screw conveyor 170 was operated, and then the grinder 160 was rotated at a speed of 200 rpm. The setting and adjustment of the driving conditions, such as the speed of all the above power unit is made through the control panel 240 by the user.

It is preferable to set the purified sludge: quicklime (CaO): coated quicklime (CaO) to 100: 20 to 30: 5 to 10 in a mixing ratio suitable for treating the purified sludge. : 30: 5 was mixed. Hereinafter, the mixing ratio of the workpiece and the treating agent is a weight ratio, and in the mixing ratio, the unit after the numeral is omitted or only expressed in% means the weight ratio. As a result of mixing the above materials, it took 20 minutes to rise to the maximum heat generation temperature of 105 ℃, the content of the water contained in the final reactant was 21% as a result of analyzing by the calpisha moisture meter. At the above mixing ratio, the remaining materials were the same and the input of quicklime (CaO) was increased to 40%, the maximum exothermic temperature was raised to 110 ° C, and the content of water in the final reactant dropped to 17%.

Referring to the above conditions by operating the transfer screw 114 of the treatment 110 between the processing object 110, the treatment screw 120 of the purified water sludge stored in the passages (110, 120, 130): quicklime (CaO): The materials were fed to the feed screw conveyor 140 so that the mixing ratio of the coated quicklime (CaO) was 100: 30: 5. Accordingly, the feed screw conveyor 140 transfers the three kinds of supplied samples (sludge, quicklime, coated quicklime) to the grinder 160, and in the grinder 160, the mixed samples are mixed to some extent while grinding the injected samples. The furnace was introduced into the kiln body 210 of the kiln mixer 200 through the screw conveyor 170. Samples entered into the kiln body 210 began to generate steam as the exothermic reaction began.

In the above process, the sludge is introduced into the feed screw conveyor 140 from the processed object 110 through the input screw conveyor 170 through the inlet 212 of the kiln mixer 200, the kiln body 210 The time elapsed before entering the interior was about 1 minute, and when the material was directly fed from the feed screw conveyor 140 to the kiln mixer 200 without the grinder 160, the exothermic reaction did not start immediately after the feeding. . On the other hand, the exothermic reaction started to occur as soon as the materials were introduced into the kiln body 210 since the grinder 160 was further configured. Through this, when the material is put into the kiln body 210 after attaching the grinder 160, an exothermic reaction occurred, but the exothermic reaction did not occur at all in the process before the grinder 160 was attached to the grinder ( The installation of 160) was found to be of great help in the treatment of sludge.

The material introduced into the kiln mixer 200 is stirred and mixed evenly by the opposite rotational direction and the speed difference between the kiln body 210 and the mixing screw 250, and after about 5 minutes after entering the kiln body 200, exothermic reaction After about 10 minutes, the most rapidly generated steam was generated by the steam recovery hole (not shown) installed in the treatment outlet 214, and after 20 minutes, the amount of generated steam was remarkable. It was confirmed that the decrease.

Through the above experimental results, it was found that the treatment time of the purified sludge was about 25 minutes, and based on this, the kiln body 210 was rotated at a speed of 6 rpm clockwise and the triangular mixing screw 250 inside the kiln body 210. ) Rotated counterclockwise at a speed of 25 rpm, and after about 20 minutes after the sludge was introduced between the workpieces 110, the treated sludge was discharged to the outlet 214 of the kiln mixer 200. Under these conditions, the unit was able to process about 5 tonnes of sludge per hour. In order to confirm whether the treated sludge can be used as a cover material or cement raw material, calcium concentration, elution concentration of metal ions, and water content were requested from the Korea Basic Science Research Institute.

Before and after treatment Water purification sludge  Test result Test Items Concentration before treatment Concentration after treatment Quicklime (CaO) (%) 0.12 45 Aluminum Elution Concentration (ppm) 42.50 0.54 Moisture concentration (%) 81 20 Copper (ppm) Not detected Not detected Zinc (ppm) Not detected Not detected

As can be seen from Table 1 above, 42.50 ppm of aluminum (Al) was eluted before treatment, but 0.54 ppm was eluted after treatment by the present invention. The concentration of aluminum (Al), copper (Cu), and zinc (Zn) was analyzed using an ICP analyzer, a water concentration was measured using a Calpisha moisture analyzer, and calcium concentration was analyzed using XRF. In the results of Table 1, the treated final material contains 45% of quicklime (CaO), and the result of requesting the cement manufacturer for its validity as a cement raw material was reported to be a good raw material.

Example 2 Inhibition and Drying of Hazardous Substances in Sewage Sludge

Water purification sludge is composed of inorganic materials, but most sewage sludge is composed of organic materials. So, when burned, only a small amount of ash remains as a residue. However, the combustion law is no longer progressing due to air pollution and civil complaints, and is in a stalemate state. In view of these circumstances, in the present invention, the sewage sludge rich in organic matter can be used as a lime fertilizer, land improver, covering agent, cement raw material, etc. by using this device to suppress the elution of harmful substances such as heavy metals and oils. I want to open the way. In particular, sewage sludge does not easily undergo degassing of water because the film of the coagulant strongly surrounds the surface of the sludge as compared to purified sludge. Therefore, in order to obtain dry powder of sewage sludge using quicklime (CaO), the added amount of quicklime (CaO) is consumed more than that of purified sludge, and since the sewage sludge contains a large amount of harmful substances such as oil and heavy metals, their leaching In order to shield the oil, the coated quicklime (CaO), which reacts with oil, water glass to fix harmful components, and iron sulfate to fix heavy metals should be added.

In view of these characteristics, the sewage sludge, quicklime (CaO), and coated quicklime are put into the respective slits 110, 120, and 130 in the same manner as in the purified sludge, and additionally, water glass and ferrous sulfate are disposed between the other treatment agents. (132, 134) and kiln mixer 200 was started. Sewage sludge: Quicklime (CaO): Coated quicklime: Water glass: Ferrous sulfate The mixing ratio is preferably in the range of 100: 20 ~ 30: 5 ~ 10: 2 ~ 3: 1 ~ 2 by weight ratio, in the experiment by weight ratio Sewage sludge: Quicklime (CaO): Coated quicklime: Water glass: Ferrous sulfate = 100: 30: 10: 2: 1 The mixture was treated under the conditions of 20.2% of moisture content and it took 26 minutes to rise to the maximum temperature of 105 ℃. .

In the above mixing conditions, the kiln mixer 200 was operated under the same conditions as in the water purification sludge. At this time, the rotation speed of the grinder 160 was set to 200rpm, triangular mixing screw 250 was rotated at a speed of 20rpm in the counterclockwise direction. Sewage sludge contains a small amount of oil and heavy metals (zinc and copper). When water glass (2% to 3% by weight) and iron sulfate are added, the exothermic reaction occurs slowly. After attachment, the mixing capacity was improved, and water vapor and odor were the most generated after 20 minutes of exothermic reaction as in the purified sludge without water glass. The results of analyzing the components of the final discharged dry powder are shown in Table 2.

Treated with a dissolution inhibitor Sewage sludge  Component Analysis pH Water content carbon Organic matter nitrogen Organics / N salt Alkaline Soluble Calcium 13.6 20.2 2.51 12.2 0.70 15.6 0.03 42.2 42.2

Example 3 Treatment of Food By-Products

Since food by-products contain a large amount of impurities such as metal (cutlery, chopsticks), vinyl, and paper, the metals attached to the magnets are classified as magnets. Classified. Next, the food is finely pulverized like porridge and then put into the processed material (110), food by-product: quicklime (CaO): coated quicklime (CaO): water glass: iron sulfate = 100: 30: 5: 2: 1 The kiln mixer 200 was operated under the same conditions as in the sewage sludge, and mixed to obtain dry powder. By-products: Quicklime (CaO): Coated quicklime (CaO): Water glass: The mixing ratio of iron sulfate is 100: 30 ~ 40: 5 ~ 10: 2 ~ 3: 1 ~ 2. It is preferable to determine within this range. Since food by-products do not contain coagulant components, dry powders can be obtained relatively easily compared to sewage sludge. The analysis results obtained to recycle the powder obtained under these conditions as fertilizer are shown in Table 3.

Component Analysis of Food By-Products Treated with Elution Inhibitors pH Water content carbon Organic matter nitrogen Organics / N salt Alkaline Soluble Calcium 13.5 19.8 (%) 2.3 (%) 13.2 (%) 0.48 (%) 30.2 (%) 0.28 (%) 42.0 39.8 (%)

As can be seen in Table 3, the powder obtained in the present invention is 39.8% of soluble calcium, 13.2% of organic matter, 0.28% of salt, 19.8% of moisture, and the results were satisfied with the criteria of lime treatment fertilizer. . In other words, the ground value of the lime-treated fertilizer (02.11.8 new) is required to be 15% or more of alkali content, 10% or more of organic matter, 1.0% or less of salt, and 50% or less of water. It can be confirmed that silver is suitable as a fertilizer.

Example 4 Treatment of Waste Paint

In the manufacture of automobiles, ships, and the like, the paints discharged after metal coating are mostly oily, so they easily evaporate, have a high combustibility, and contain a large amount of harmful components. Due to these characteristics, most of them are treated by incineration. Such incineration is an undesirable method in terms of resource recycling. In the present invention, an organic solvent is collected and recycled using an elution inhibitor, and the solid component of the paint is used as cement raw material together with quicklime (CaO). Since the waste paint does not contain water, it adds water to cause an exothermic reaction, which dissolves fatty acids and surfactants in the coated quicklime (CaO), causing secondary heat generation, while fatty acids and surfactants react with some of the organic solvent. Part of the organic solvent is immobilized, and the water and the remaining organic solvent are evaporated and removed to complete the treatment of the waste paint. As a surfactant, it is preferable that a terminal group has a polar group as an oil-soluble dispersing agent which melt | dissolves in an oil component, and Specifically, BYK Chemie's Disperplast-1150 (BYK-1150) product was applied to this invention. Fatty acid, which is readily available and inexpensive, is preferred. At this time, the water and the organic solvent to be evaporated to the outside is recycled by installing a collecting device to the outside to separate the water and the organic solvent to collect. Many products are already available for the collection device, so you can use the existing ones according to your purpose.

In order to implement the above method, 100g of waste paint was mixed and tested as follows.

Paint: Quicklime (CaO): Water: Coated Quicklime (CaO): Waterglass

= 100g: 80g: 60g: 20g: 5g

The above mixing ratio may be changed within the range of 100g: 60g ~ 80g: 50g ~ 60g: 15g ~ 20g: 5g ~ 6g.

In the experiment, when the waste paint and the elution inhibitor (quick lime, coated quick lime, water glass) are mixed first, and then water is added, the exothermic reaction does not occur. Therefore, when the elution inhibitor and water are added first, the reaction is stirred to start the exothermic reaction. Applicants have found that after several experiments they can be added to obtain good results. In particular, when the four components of quicklime (CaO), water, coated quicklime (CaO), and water glass are mixed and stirred in waste paint, the exothermic reaction occurs relatively quickly compared to the sludge, and the exothermic reaction is completed within 15 minutes after 15 minutes. Therefore, it is very important to set the input timing of the waste paint. Therefore, in the present invention, the waste paint storage container in which the heating device is built using this characteristic is separately installed. The heating temperature was maintained at 30 ° C. to improve the flowability of the waste paint, and the waste paint was directly injected into the inlet 212 of the kiln body 200 shown in FIG. 1 through a compressor. When the waste paint is processed, the water is injected into the feed screw conveyor 140 with quicklime, coated quicklime, and water glass into the feed screw conveyor 140 at the mixing ratios 120, 130, 132, and 134 of the processing agent of the material supply device 100 without applying a grinder. By the feed screw conveyor 140 directly into the kiln body 210 of the kiln mixer 200.

Specifically, after the quicklime (CaO) in the treatment agent 120, the coated quicklime (CaO), water glass in a predetermined amount of the other treatment agents (130, 132) to the feed screw conveyor 140, respectively, the water is passed between the last treatment agent ( 134) was sprayed on the quicklime passing through the feed screw conveyor 140, coated quicklime, water glass, and introduced into the inlet 212 of the kiln mixer 200. When quicklime (CaO) and water meet, heat generation occurs within 10 seconds, and the time required to enter the inlet 212 of the kiln body 210 by mixing in the supply screw conveyor 140 is about 10 seconds, which generates heat of quicklime (CaO). As the time coincides, the grinder is removed from the apparatus of FIG. 1 so that the feed screw conveyor 140 enters the inlet 212 of the kiln mixer 200 without passing through the grinder. At the same time, the waste paint was introduced into the kiln body 210 through the inlet 212 of the kiln mixer 200. As a result, an exothermic reaction occurred in the kiln mixer 200 as soon as it was introduced, and finally a dry powder was obtained.

In this experiment, the operating conditions of the kiln mixer 200 were the same as the experimental conditions of the previous water purification sludge, and all parts of the kiln mixer 200 were sealed to prevent the outflow of steam to the outside. In addition, the organic solvent and water evaporated while being processed in the kiln body 210 were connected to an external condenser 300 by a pipe to the outlet 214 to separate the water and the organic solvent.

As a result of analyzing the dry powder obtained through the above experiments, it was concluded that the cement manufacturer is suitable for use as a cement raw material.

Example 5 Treatment of Insulating Oil Containing PCBs

Insulating oils containing PCBs, such as waste paints, are oil-based, so that water is added to induce calcining of quicklime (CaO), which separates fatty acids and surfactants from the coated quicklime (CaO), causing secondary exotherm to evaporate moisture. As a surfactant, it is preferable that a terminal group has a polar group as an oil-soluble dispersing agent which melt | dissolves in an oil component, and Specifically, BYK Chemie's Disperplast-1150 (BYK-1150) product was applied to this invention. Fatty acid, which is readily available and inexpensive, is preferred. At this time, the surfactant and fatty acid separated from the coated quicklime (CaO) react with the PCBs to trap the PCBs in the porous gel of the water glass to block the elution of the PCBs. This principle is applied to this device to process PCBs contained in insulating oil.

By applying the above method, the insulating oil containing 6.65μg / g PCBs is mixed with the treatment agent and the mixing conditions as shown in Table 4 below.After processing the PCBs, the PCBs analysis center requested the results of dissolution of the PCBs. It did not happen. In detail, after treating with the mixing ratio shown in Table 4, it was confirmed that the PCBs were not eluted from any of the samples 1-6 as analyzed by the Korea Environmental Analysis Center.

Mixing ratio of PCBs treatment to insulating oil Sample number Insulation oil CaO (g): Coating CaO (g) water Iron sulfate water glass One 20 g 40g: 40g 80 5 4 2 20 g 40g: 40g 80 5 3 3 20 g 35g: 35g 70 5 4 4 20 g 35g: 35g 70 5 3 5 20 g 30g: 30g 60 5 4 6 20 g 30g: 30g 60 5 3

Based on the above results, using this apparatus, the samples corresponding to the mixing ratio of No. 6 in Table 4 were put in each path and tested under the same test conditions as in the waste paint. That is, the feed screw conveyor 140 in the mixing ratio of the quicklime (CaO), coated quicklime (CaO), water glass, iron sulfate in each of the samples in Table 4 above in the same way as the waste paint treatment method (110, 120, 130, 132) After the water was injected into the sample through the inlet 212 of the kiln mixer 200 while spraying the sample moving in the feed screw conveyor 140 in the end 134. This is the heat generated within 10 seconds when the quicklime (CaO) and water meets, the time taken to enter the inlet 212 of the kiln body 210 by mixing in the supply screw conveyor 140 takes about 10 seconds of the quicklime (CaO) This is because it is effective to directly enter the kiln mixer 200 without passing through the grinder because it matches the exothermic time. When the insulating oil is introduced into the inlet 212 at the same time as the treatment agent is added to the kiln mixer 200, the sample is mixed and transported in the kiln mixer 200, and exothermic reaction occurs and is discharged through the outlet 214 as a dry powder. Dry powder was obtained. At this time, the evaporated organic solvent and water were collected and separated into water and the organic solvent by connecting an external condenser 300 to the outlet 214.

As a result of requesting the dried powder obtained from the Korea Environmental Analysis Center to analyze the components, it was confirmed that the PCBs were not eluted at all. Thus, it has been proved that the dry powder treated by the present invention above is suitable as a cement raw material.

The embodiments disclosed herein are only presented by selecting the most preferred examples to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment, the present invention Various changes and modifications are possible within the scope without departing from the spirit of the invention, as well as other equivalent embodiments.

As described above, according to the present invention, purified sludge, sewage sludge, food by-products, waste paint, oil-contaminated soil, etc. can be effectively treated continuously and in large quantities using an elution inhibitor such as quicklime and coated quicklime.

In particular, the waste treatment apparatus according to the present invention can continuously and quickly treat various wastes, and as a result, there is an effect that it is possible to simply and quickly treat a large amount of waste. The by-products treated in this way have the advantage that they can be recycled as a cover material, cement raw material, calcareous fertilizer, etc., in the landfill because no harmful substances are eluted at all.

In addition, the waste treatment apparatus according to the present invention can be installed and operated on the site where the sludge and by-products are discharged, and the operation method is simple, so that it can be operated with a small number of people. These by-products include food by-products, waste paint, insulating oil containing PCBs, and heavy metal contaminated soil.

Furthermore, the present invention collects and recycles organic solvents generated when treating oily waste paint, PCBs-containing insulating oil, and the like, and also recycles the final reactants.

Claims (19)

delete A material supply unit for supplying a treatment agent for preventing elution of hazardous substances from the wastes and the wastes at a mixing ratio set by the user; And And mixing and stirring the mixed ratio of waste and treatment agent supplied from the material supply unit to prevent elution of harmful substances contained in the waste and to dry and discharge the dried powder as a dry powder, The material supply device unit, Between the waste to be stored and put in according to the input amount set by the user, Between the treatment agent which inputs at least one selected from quickener (CaO), coated quickener coated with surfactant and fatty acid, water glass, ferrous sulfate, water except the quicklime and quicklime according to the input amount set by the user, And a feed screw conveyor for transferring the waste and the processing agent introduced at a specific mixing ratio between the processed materials and between the processing agents to the mixing processing unit. Between the to-be-processed object and between the processing agent are vertically connected to the upper side of the supply screw conveyor is installed horizontally and dropping the contents stored therein and put into the supply screw conveyor, Between the object to be treated and between the treatment agent in which the quicklime is stored, a conveying screw for smoothly inducing the supply of the contents is installed waste treatment apparatus using a toxic material leaching inhibitor. The method of claim 2, wherein the mixing apparatus unit A kiln body installed in the material supply device to accommodate the materials inside and react by mixing and stirring while stirring, rotating and being installed to be inclined downward toward the outlet; A kiln mixer rotatably installed in the kiln body, the kiln mixer having a mixing screw for rotating and stirring the materials in the kiln body by rotating in the kiln body. Processing unit. 4. The waste disposal apparatus according to claim 3, wherein blades are attached to an inner wall of the kiln body in a circumferential direction. [5] The waste treatment apparatus of claim 4, wherein the mixing screw is formed on the surface of the triangular rod portion of the triangular cross section along the longitudinal direction of the vanes in a spiral shape. 4. The waste disposal apparatus according to claim 3, further comprising a kiln driving means for rotating the kiln body and a screw driving means for rotating the mixing screw. The driving mechanism of claim 6, wherein the kiln driving means includes a motor, a speed reducer for reducing the driving force of the motor, a driving wheel connected to the speed reducer, and mounted on an outer circumferential surface of the kiln body and in contact with the driving wheel. Waste treatment apparatus using a toxic material leaching agent, characterized in that it comprises a driven wheel rotated in accordance with the rotation. The waste treatment apparatus according to claim 7, wherein the kiln body and the mixing screw have opposite rotation directions, and the mixing screw rotates faster than the kiln body in rotation speed. delete 3. The waste disposal apparatus of claim 2, further comprising a grinder between the feed screw conveyor and the mixing processing unit to grind and mix the waste material supplied from the feed screw conveyor and the material of the treating agent. 11. The pulverizer of claim 10, wherein the pulverizer includes an outer cylinder connected to the supply screw conveyor, two or more rotary shafts installed perpendicular to the outer cylinder, impellers mounted on the rotary shafts, and a driving motor for rotating the rotary shafts. And Waste treatment apparatus using a toxic substance leaching inhibitor, characterized in that the impeller is rotated while grinding the materials introduced between the impeller. The waste treatment apparatus of claim 11, further comprising an input screw conveyor configured to transfer the material pulverized from the grinder to the mixing treatment unit. The waste treatment apparatus of claim 2, wherein the waste is any one of purified sludge, sewage sludge, food by-products, waste paint, and insulating oil containing PCBs. delete delete delete delete delete delete

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