KR0177364B1 - Organic and inorganic sludge drying method and apparatus - Google Patents

Abstract

The present invention is an organic and inorganic sludge (Sludge) that allows to reduce and sterilize at the same time by continuously drying the water content of various organic or inorganic sludge discharged from industrial sites, water and sewage water purification plant, and contaminant treatment plant to maintain an appropriate level. ) Is a drying method and apparatus, and the samples are put into independent hoppers according to the properties of the sample to be dried and supplied into the dryer by a predetermined amount, and a multi-step guide plate is formed to sequentially pass the samples in the drying chamber of the dryer. The paddles with transfer-stirring-separation-crushing functions are repeatedly or separately installed so that they are rotated integrally, and heating means for supplying hot air to the drying chamber where the guide plate is installed is maintained to maintain high temperature. In the upper part of the drying chamber, an exhaust device for forcibly discharging the steam generated by drying to the outside is provided.

Description

Organic and inorganic sludge drying method and apparatus

The present invention is to maintain the moisture content of various organic or inorganic sludge discharged from organic and inorganic sludge (sudge) and the apparatus, more specifically, industrial sites, water and sewage water purification plant, and condensation treatment plant. The present invention relates to a method and apparatus for drying organic and inorganic sludge, which is capable of reducing weight loss and sterilization by continuous drying.

In general, organic and inorganic sludges, such as wastewater and manure, produced at various industrial sites such as food factories, textile and paper mills, sewage treatment plants, and livestock farms, are made of humid substances with a water content of about 89 to 90%. There is me.

In the case of landfilling of this moist sludge, soil and groundwater contamination and environmental pollution are caused by large amounts of leachate, and recently, due to landfill shortages and landfill rejection of aversive waste, Processing is almost impossible.

As a representative facility for removing the water contained in the sludge, the so-called terminal treatment plant is an example.

The terminal treatment plant stores and settles sludge in concrete sedimentation tank for a certain period of time, sterilizes it with neutralized supernatant and discharges it, and the residue is recycled into incineration, landfill and fertilizer.

However, the terminal treatment method takes a relatively long time due to the natural fermentation, as well as insufficient throughput compared to the size of the treatment facility, and thus various restrictions occur in treating a large amount of sludge.

In addition, when chemicals are administered to ferment and sterilize sludge in the terminal treatment process, chemical components remain in the processed by-products, causing toxicity that is not friendly to soil or ecosystem, thereby inhibiting the environment.

The above example shows that one of the solutions to be considered when treating sludge with water content is dehydration treatment. As part of the solution, research and development in the field of sludge drying and incineration is actively promoted. have.

As an example of the prior art for the drying treatment apparatus, a control plate is formed in the main inlet installed in the upper part of the dryer, and the heating plates are stacked at predetermined intervals in the drying chamber, and the stirring plates having auxiliary blades are installed to rotate in a predetermined direction. As the sludge falling onto the heating plate while stirring and conveying is dried, the dried residues are known to be discharged through the outlet.

However, the drying method was difficult to properly control the supply amount of the sludge placed in the water content, it is not possible to grind the sludge in the form of agglomeration formed during the stirring and conveying process to lower the conveyance, of course, in the severe case the sludge is accumulated in the stirring Overloading of the liver has resulted in shortened life and damage to the equipment.

The present invention has been made in view of the above problems of the conventional sludge drying apparatus, and an object thereof is to provide a method for drying an organic / inorganic sludge and an apparatus for improving the drying efficiency of the sludge.

Another object of the present invention is to provide a method and apparatus for drying an organic / inorganic sludge which can minimize the installation area of a drying facility and prevent secondary contamination due to treated by-products in advance.

According to the present invention for achieving the above object, the sample is put into independent hoppers according to the physical properties of the sample to be dried and supplied into the dryer by a predetermined amount, thereby forming a multi-stage guide plate to sequentially pass the sample in the drying chamber of the dryer. Each paddle with transfer-stirring-separating-crushing function is repeatedly or separately installed to rotate integrally, and heating means for supplying hot air to the drying chamber in which the guide plate is installed is maintained to maintain high temperature. By installing an exhaust device forcibly discharging the steam generated by drying to the outside of the drying chamber, the sample containing a large amount of water (about 80 ~ 90%) to continuously maintain the moisture content of about 20 to 30% Drying is characterized in that the treatment is easy to transport and discard or recycle.

1 is a cross-sectional view schematically showing a drying apparatus of an embodiment of the present invention.

2 (a) and 2 (b) are cross-sectional views illustrating one example and another example of the hopper of the present invention.

3 is a cross-sectional view of a part of the drying apparatus of the present invention.

4 (a) to (d) are a perspective view and a cross-sectional view of each of the supply means of the present invention.

* Explanation of symbols for main parts of the drawings

100: drying base 110: drying chamber

120: heat insulation layer 200: guide means

210, 220, 230, 240, 250: 1st ~ 5th stage induction plate

300: hopper 310, 320: screw shaft

311, 321: rotary blade shaft 323: control panel

400: exhaust device 410: fan motor

500: outlet 600: supply means

610: transfer paddle 620: separation paddle

630: stirring paddle 640: grinding paddle

700: heating means

Hereinafter, a method for drying an organic / inorganic sludge of the present invention and a device thereof will be described with reference to the accompanying drawings.

1 is a cross-sectional view schematically showing a drying apparatus of an embodiment of the present invention, the sludge (hereinafter referred to as a sample) containing a large amount of moisture in the drying chamber 110 of the drying base 100 is sequentially dried Inducing means 200 having the first to fifth stage guide plates 210, 220, 230, 240, 250 are installed to continuously transfer-separate-stirrer-crush the sample. The supply means 600 and the heating means 700 for applying hot air are provided.

In the drying method of the present invention, the second stage induction after the sample supplied from the outside is preheated to the cabin temperature (about 170 ℃) atmosphere set in the drying chamber 110 in the process of being transferred from the first stage induction plate 210, Entering the plate 220 is heated to about 200 ℃ to complete the drying of the first step to quickly achieve the latent heat of evaporation.

In the third stage guide plate 230, the sample reaching the latent heat of evaporation is further separated, crushed, and transported, thereby further activating the evaporation rate of the moisture in the sample, that is, the gasification state of the water, and the fourth stage guide plate ( The fourth stage guide plate 240 is a practical drying step of the sample, and the two stages of drying are completed while the temperature of the part of this part reaches a maximum of about 400 ° C.

The sample dried in the fourth stage guide plate 240 is transferred to the fifth stage guide plate 250 on the lower side, and cooled after being cooled to contain moisture in a proper state.

Drying apparatus of the present invention to be dried in the above manner, forming a heat insulating layer 120 to prevent heat loss between the inner and outer plates of the drying body 100 of the container type formed with a drying chamber 110 therein. do.

At this time, the heat insulation layer 120 is a thickness of about 65mm ~ 100mm is suitable.

The upper one side of the drying body 100 is provided with a hopper 300 that can adjust the input amount according to the state of the sample for drying treatment, the forced steam generated in the drying chamber 110 on one side of the hopper 300 An exhaust device 400 having a fan motor 410 is installed to discharge the gas.

Exhaust device 400 is provided with a damper 420 to adjust the opening and closing degree of the wet steam is adjusted according to the drying rate of the sample and the set temperature of the drying chamber 110.

The drying chamber 110 is provided with first to fifth stage guide plates 210, 220, 230, 240, 250 so that the samples introduced from the hopper 300 are sequentially transferred and guided. An induction means 200 is provided, and a discharge port 500 for discharging the finally dried sample to the outside is formed at the end of the fifth end guide plate 250.

The upper surface of each of the guide plates 210, 220, 230, 240, 250 installed in the multi-layer is composed of a plate body in which a plurality of grooves G having an arc shape are continuously repeated in a parallel state, and each On the upper side of the groove G, a supply means 600 having various functions, respectively, is provided to continuously transfer, separate, and stir the sample.

The supply means 600 includes a transfer paddle 610 for transferring a sample, a separation paddle 620 for preventing the sample from being entangled in a lump form, and a stirring paddle for dispersing the sample to evenly contact air. 630 and a grinding paddle 640 for crushing the sample finely.

The transfer paddle 610 is installed in a plurality or concentrated to be distributed evenly in the guide means 200 of each layer, the separation paddle 620 is installed separately between the transfer paddle 610. The stirring paddle 630 and the grinding paddle 640 are mainly installed on the fifth end guide plate 250 at the point where the drying of the sample is finished.

The supply means 600 composed of the various paddles 610, 620, 630, 640 is preferably connected to a single motor by connecting the power transmission means.

At least one heating means 700 is installed at both sides of the drying main body 100 to supply hot air to the drying chamber 110 to maintain a high temperature.

The heating means 700 is composed of a burner 710 for generating hot air and the injection pipe 720 for discharging the hot air, the second end guide plate 220 of the multilayer induction means 200 installed in the drying chamber 110 The hot air is applied to the side surfaces of the third end guide plate 230 and the fourth end guide plate 240.

Figure 2 (a) (b) is a cross-sectional view of different examples of the hopper of the present invention, the hopper 300 has a water content of about 90% depending on the characteristics of the sample to be dried, that is, the moisture content contained in the sample It can be selectively installed by dividing into a first type to be applied when the following, and a second type to be applied when the water content is 90% or more.

The first type includes a screw shaft 310 installed at an upper portion into which a sample is introduced, and a screw shaft 310 for dispersing the sample evenly spread thereon, a rotary wing shaft 311 for continuously dropping and guiding the sample, and a pair rotated together to discharge a fixed quantity. It consists of the spline shaft 312 of.

The second type is provided with a screw shaft 320 and a rotary blade shaft 321 which can be the same as the screw side 310 and the rotary blade shaft 311, the drum for discharging the sample to the outlet 325 side It is comprised by the shaft 322 and the control plate 323 which is provided adjacent to this drum shaft 322, and operates based on the hinge 324 which adjusts the discharge amount of a sample.

Therefore, the sample to be injected into the hopper 300 is the rotational speed change of the screw shaft 310, 320 and the rotary blade shaft 311, 321, the spline shaft 312 or the drum shaft 323 and the control plate 323 The input amount is freely adjusted according to the open / closed state, and a uniform amount of sample is continuously added to the drying chamber 110.

3 is a cross-sectional view of a part of the drying apparatus of the present invention, the induction means 200 installed in a multi-layer in the drying chamber 110 is the first stage from the upper side into which the sample is first introduced from the hopper 300 Arranged from the guide plate 210 to the fifth stage guide plate 250, the guide plate of each stage is each paddle 610 constituting the inner circumferential surface of the arc-shaped groove (G) formed on the upper surface and the supply means 600 ( 620, 630, and 640 maintain a distance that can be rotated in proximity.

4 (a)-(d) are the perspective view and the side view which respectively showed the said supply means.

The first stage guide plate 210 is heated in the cabin temperature (about 170 ℃) atmosphere set in the drying chamber 110 while gradually transferring the sample introduced through the hopper 300, the second stage guide plate 620 In this case, the heating temperature is increased by about 200 ° C. by the heating means 700 installed at one side, thereby completing the drying in one step to rapidly achieve latent heat of evaporation.

In the above process, according to the characteristics of the sample, the arrangement of the transfer paddle 610 and the separation paddle 620 can be freely changed, the increase and decrease is possible, the separation paddle 620 during the transfer of the sample to about 200rpm It rotates and cuts high viscosity physical properties to increase the contact area with hot air flowing in the aircraft.

In the third stage guide plate 230, the sample reaching the latent heat of evaporation is further separated, crushed, and transported, thereby further activating the evaporation rate of the water in the sample, that is, the gasification state of the water, and the four-stage guide plate 240. Transfer to.

This four-stage guide plate 240 is a practical drying step of the sample, the temperature of the part of this portion reaches a maximum of about 400 ℃, and the sample is transported at the same time the stirring paddle 630 rotates at approximately 300 ~ 500rpm And the finer by the action of the separation paddle 620 and evenly distributed and evenly dried to the highest.

The second stage, the third stage, and the fourth stage induction plate 240 are individually heated by heating means 700 for supplying hot air, respectively, thereby enabling stepwise drying.

The sample dried in the fourth stage guide plate 240 is transferred to the fifth stage guide plate 250 at the lower side to minimize the size of the sample by the grinding paddle 640 and the stirring paddle 630. As it is cooled while cooling, it is discharged through the outlet 500 after completing the drying to contain the moisture of the appropriate state.

As a result of repeated experiments, the dried sample was found to have the most desirable water content of 20 to 40%.

When the water content is 40% or more, the weight loss and the weight loss are not properly performed, and thus the handling is inconvenient, and thus, a desirable reprocessing effect cannot be obtained.

There was an advantage that the weight can be reduced when the moisture content is kept below 20% and up to 5%. However, the sample becomes powdered and scattered in the air, thus violating the purpose of reprocessing the sample to prevent environmental pollution. .

By reprocessing the sample to be dried as required water content as described above to install a temperature sensor for sensing the temperature of the drying chamber 110 in the final discharged portion to control the amount of hot air supply of the heating means (700).

In addition, it is preferable to form a see-through window of the drying base 100 so as to visually check the dry state of the sample during the heating operation of the heating means 700.

On the other hand, the side plate of the drying base 100 to facilitate the maintenance of each of the paddles 610, 620, 630, 640 constituting the air raid means 600, and each of the paddles 610 620, 630, 640, it is desirable to have a spring that cushions the ends of the shafts formed on both sides.

The present invention as described above, by drying the sludge with a high moisture content in a suitable state to significantly reduce the weight and volume has the effect of facilitating the transport and disposal operation according to the reprocessing of the sludge.

In addition, when the sludge is dried, it is sterilized by high temperature of 200 ~ 400 ℃, and thus sterilization of bacteria, parasites and odors remaining in the sludge, thus maintaining a pleasant and clean working environment and at the same time. Environmental pollution is prevented.

In addition, the entire process of sludge input, drying, and discharge is automatically performed, allowing reprocessing work with minimum personnel, and the arrangement of heating equipment is directly or reheated, making it easy to cope with the increase of waste. There is an advantage that can be installed in the area.

Claims (9)

The sample containing a large amount of water flows into the first end guide plate 210 of the induction means 200 installed in the drying chamber 110 of the drying body 100 and is heated by the supply means 600. After preheating to the in-flight temperature atmosphere set in the drying chamber 110 by the heating action of the heating means 700 for supplying the heat, enter the second stage induction plate 220 is heated to about 200 ℃ to heat the latent evaporation Steps: The sample transferred to the third stage induction plate 230 in the latent heat of evaporation from the second stage induction plate 220 is finely separated and crushed while gradually heating to further activate the evaporation of moisture in the sample. Separation and shredding step to: and the second drying step of transferring the sample passed through the third stage induction plate 240 to the fourth stage induction plate 240 and finally dried in an atmosphere of about 400 ℃: The fifth stage induction of the sample dried in the fourth stage guide plate 240 of the lower side 250, to transfer oil, the method of inorganic sludge drying, characterized in that a complete drying after the step for discharging the cooling water to be contained in the appropriate state. The drying method of claim 1, wherein the sample having been dried through the drying chamber (110) maintains a water content of about 20 to 40%. The sample flows into the drying chamber 110 of the drying base 100 in a container form sequentially and is installed to dry, and the first to fifth stage guide plates 210, 220, 230, 240 from the top Induction means 200 having a 250 and: It is installed on the upper side of the drying main body 100 to supply a sample to the drying chamber 110 and adjusted to adjust the input amount according to the state of the sample for drying treatment Hopper 300 with a function: installed on one side of the hopper 300 is provided with a fan motor 410 to forcibly discharge the wet steam generated in the drying chamber 110, the drying rate of the sample and the drying chamber 110 Opening and closing degree is adjusted according to the set temperature of the exhaust device 400 with a damper 420 to control the discharge of the wet steam and: installed in the rotatable means to the induction means 200 is continuously transported-separating-stirring Supply means 600 with a plurality of paddles 610, 620, 630 and 640 for grinding, and At least one or more heaters are installed to supply hot air to the induction means 200 of the drying chamber 110 to maintain a high temperature state, and a heating means 700 having a burner 710 for generating hot air and an injection tube 720 for discharging hot air. Drying equipment for organic and inorganic sludge characterized in that the configuration, including). According to claim 3, wherein the heat insulating layer 120 to prevent heat loss between the inner and outer plates of the drying base 100 is formed, the heat insulating layer 120 is characterized in that the thickness of about 65mm ~ 100mm Drying equipment for organic and inorganic sludge. According to claim 3, wherein the hopper 300 is a screw shaft 310 for dispersing the sample evenly spread, a rotary blade shaft 311 for continuously dropping and guiding the sample, and a pair of rotation that is engaged to discharge the fixed amount Drying device for organic and inorganic sludge, characterized in that composed of a spline shaft (312). The drum 322 and the drum of claim 3 or 5, wherein the hopper 300 includes a screw shaft 320 and a rotary blade shaft 321, and discharges a sample to the outlet 325 shaft. An apparatus for drying organic / inorganic sludge, characterized in that the control plate (323) is installed adjacent to the shaft (322) and operated based on the hinge (324) to control the discharge of the sample. According to claim 3, At the end of the fifth end guide plate 250 provided in the guide means 200, an organic / inorganic inorganic outlet, characterized in that the discharge port 500 for discharging the finished sample to the outside is formed Sludge drying equipment. The method of claim 3, wherein the supply means 600 is a transfer paddle 610 for transporting the sample, the separation paddle 620 to prevent the sample from tangling in the form of agglomerate, and the air to disperse the sample Drying device for organic and inorganic sludge, characterized in that consisting of a stirring paddle (630) to evenly contact, and a grinding paddle (640) for finely crushing the sample. The method of claim 8, wherein the plurality of conveying paddles 610 are intensively or separately installed to be evenly distributed in the guide means 200 of each layer, the separation paddle 620 is the transfer paddle 610 It is separately installed between, the stirring paddle 630 and the grinding paddle 640 is an organic-inorganic, characterized in that it is selectively installed on the fifth end guide plate 250 at the point where the drying of the sample is finished. Drying equipment of frost sludge.