KR20210023378A - Continuous quicklime reaction mixer for organic waste treatment and system comprising the same - Google Patents

Abstract

The present invention relates to a continuous lime reactor for continuously performing lime reaction of organic waste by installing two screw mixers with improved mixing and pulverizing functions in parallel, and to a system including the same. The continuous lime reactor of organic waste increases mixing and reaction efficiency of raw materials even though the continuous lime reactor of organic waste is a continuous type by installing the two screw mixers in which a first stirring blade, a second stirring blade and a plate-shaped paddle are formed in parallel. The continuous lime reactor of organic waste can prevent (delay) abrasion of the stirring blades by attaching cemented carbide blades to an upper end of the stirring blades, and provide a pulverizing function at the same time. The continuous lime reactor of organic waste and a system including the same can increase throughout per hour three times or more compared to a conventional placement method, since reaction can be continuously performed. Therefore, when processing the same amount as the reactor of a placement type, power consumption, installation cost, operation cost, and the like can be reduced.

Description

Continuous quicklime reaction mixer for organic waste treatment and system comprising the same}

The present invention relates to a continuous lime reactor for treating organic waste and a system including the same, and more particularly, two screw mixers with improved mixing and grinding functions are installed in parallel to perform the lime reaction of organic waste in a continuous manner. It relates to a continuous lime reactor and a system including the same.

Currently, due to the characteristics of dietary habits and food culture, the treatment of organic wastes such as human manure, livestock manure, slaughter waste, fish and shellfish waste, as well as food waste that is discharged in large quantities at home, has emerged as one of the big social problems.

Landfill, incineration, or recycling was used as a disposal method for these organic wastes, but in the case of landfilling, soil pollution and groundwater pollution by leachate during landfilling and securing a landfill site occur, and marine pollution such as red tide occurs when dumping at sea. Occurs, and incineration causes serious air pollution due to odor and dust.

Instead of methods such as landfill and incineration that cause environmental pollution, methods such as composting, feed, and energy (fuel) of organic waste are being developed. However, it is difficult to realize energy (fuel) due to problems in securing land and budget, and technology verification, and composting is a problem such as salt or moisture contained in organic waste, especially food waste, odor, heavy metals, and leachate. It has a problem that it is difficult to achieve stable treatment, and feed requires stability problems of the machine and thorough separate collection, and freshness maintenance problems such as spoilage, deterioration, and microbial contamination, technical support of the treatment method, and mad cow disease. There was concern.

Recently, in order to supplement and solve such a problem, an apparatus and a method that can be provided as a nutrient fertilizer or a land improver by adding quicklime to organic waste to produce a lime fertilizer product have been proposed.

Currently, a ribbon mixer is generally used as a lime reactor. In the ribbon mixer method, organic waste, raw ash, and additives are sequentially injected and stirred for about 2 hours to react. In this batch-type lime reactor, the reaction does not occur evenly because the reactants are not mixed rapidly, and in particular, the lime reaction of quicklime proceeds rapidly at the beginning (because the mixing cannot be performed rapidly), so it reacts only with a part of organic waste. And, due to the nature of the batch type, the amount of production per hour is small.

In order to solve the problem of such a general ribbon-type batch reactor, Korean Patent Registration No. 10-1124743 discloses an organic waste treatment apparatus in which a series of processes for reacting food waste and quicklime are performed integrally within a housing. In the Korean patent, the first stirring unit installed at the bottom is rotated in a forward direction to supply food waste into the body, and the introduced food is rotated forward to the second stirring unit to mix, and when the mixing is complete, the first stirring unit is reversed. It is a screw type that rotates and discharges. However, the registered patent uses a screw mixer, but still performs the lime reaction in a batch type, so the production per hour is small, and also, since food waste is supplied to the bottom of the second stirring unit, the mixing efficiency in the second stirring unit The problem has been raised that it could fall.

The present invention is to provide a reactor and a system capable of continuously performing the lime reaction of organic waste.

The present invention provides a reactor and a system capable of improving mixing and reaction efficiency even in a continuous reaction.

One aspect of the present invention for achieving the above object is

Housing 10;

A raw material inlet 20 into which raw materials including organic waste and quicklime are injected into one side of the housing;

A first screw 30 and a second screw 40 positioned inside the housing to stir and react the raw material;

An outlet portion 50 formed on the other side of the housing to discharge a lime-reacted product; And

It includes two driving units (60, 70) located outside the housing to drive the two screws, respectively,

The two screws 30, 40 are located side by side in parallel,

The first screw (30) and the second screw (40) are each shaft (31, 41), a first stirring blade (32, 42) formed to transfer the raw material in the forward direction by being positioned at a predetermined height on the shaft, the shaft Including a second stirring blade (33, 43) that is positioned at a height lower than that of the first stirring blade to transfer the raw material in the reverse direction, and a plate-shaped paddle (34, 44) located at predetermined intervals on the shaft. It relates to a continuous lime reactor for organic waste.

In the present invention, the continuous lime reactor of organic waste increased the mixing and reaction efficiency of raw materials even though it was a continuous type by installing two screw mixers in which a first stirring blade, a second stirring blade and a plate-shaped paddle were formed in parallel.

In the present invention, the continuous lime reactor for organic waste may provide a grinding function while preventing (delaying) abrasion of the stirring blade by attaching a carbide blade to the top of the stirring blade.

In the present invention, since the continuous lime reactor and system of organic waste is reacted in a continuous manner, the throughput per hour can be increased by three times or more compared to the conventional batch method (thus, power consumption when processing the same amount as the batch type reactor) , Installation cost, operation cost, etc. are reduced).

1 is a schematic diagram of a continuous lime reaction system for organic waste according to the present invention.
2 is a plan view of a continuous lime reactor for organic waste.
3 is a front view of a continuous lime reactor for organic waste.
Figure 4 shows the screw installed in the housing.
5 is an enlarged view of a plate-shaped carbide blade.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the description or drawings of the following embodiments. That is, the terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprises" or "have" described herein are intended to designate the existence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification. It is to be understood that the above other features or the possibility of the presence or addition of numbers, steps, actions, components, parts, or combinations thereof are not preliminarily excluded.

In addition, terms such as "unit", "group", and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software.

1 is a schematic diagram of a continuous lime reaction system of organic waste according to the present invention, FIG. 2 is a plan view of a continuous lime reactor of organic waste, FIG. 3 is a front view of a continuous lime reactor of organic waste, and FIG. 4 is It shows the screw installed in the housing.

2 to 4, the continuous lime reactor 100 for organic waste includes a housing 10, a raw material injection part 20, a first screw 30, a second screw, 40, and an outlet part. 50) and driving units 60 and 70.

The organic waste may be food waste, sewage sludge, agricultural and marine product residues, manure, slaughter waste, and the like.

The housing 10 has a screw installed therein, and a digestion reaction and a hydrolysis reaction of organic substances are performed by reacting organic waste (moisture) and quicklime.

The housing 10 may be made of a metal material.

Side walls 11 are formed on the front and rear surfaces of the housing 10.

A vent flange 12 for discharging water vapor or gas generated by a digestion reaction and a hydrolysis reaction may be formed at an upper end of the front or rear side of the housing 10.

A flange angle 13 for fixing a flange for coupling a raw material inlet or a vent flange may be installed on a lower surface of the upper plate of the housing 10.

A support bar 14 for connecting and fixing the upper plate and the lower plate of the housing 10 may be installed.

The raw material inlet 20 may be a hole in which raw material can be injected into the housing or an inlet pipe communicating with the hole. The inlet pipe may be located under the discharge part of the screw mixer 200 to be described later or may be connected to the discharge part.

Referring to FIG. 3, a plurality of the raw material inlet 20 may be formed on an upper end of the front part of the housing.

In addition to organic waste and quicklime, additives such as a moisture control agent and a deodorant may be included as a raw material input to the housing. The additive may be rice husk, sawdust, coco peat, or the like.

The first screw 30 and the second screw 40 are located inside the housing to stir and react the raw material. The screw transfers the raw material introduced from the raw material inlet to the outlet while stirring.

The two screws 30 and 40 are positioned side by side in parallel.

Referring to FIG. 4, the first screw 30 and the second screw 40 may be formed to be symmetrical in a mirror shape. In this case, the first stirring blades 32 and the second stirring blades 33 of the first screw have the first stirring blades 42, the second stirring blades 43 of the second screw and the spiral traveling directions of the blades It can be formed in the opposite direction.

In addition, the first screw 30 and the second screw 40 may be formed in the same structure. In this case, the first stirring blades 32 and the second stirring blades 33 of the first screw have the first stirring blades 42, the second stirring blades 43 of the second screw and the spiral traveling directions of the blades It can be formed identically.

Hereinafter, for convenience, as shown in FIG. 4, a structure in which the first screw 30 and the second screw 40 are symmetrical in a mirror shape will be described as the center.

The first screw 30 includes a shaft 31, a first stirring blade 32, a second stirring blade 33, and a paddle 34.

The first stirring blade 32 is positioned at a predetermined height on the shaft and is formed to transfer the raw material in a forward direction (from the raw material inlet to the outlet). The first stirring blade 32 is formed in a spiral shape and is spaced apart from the shaft by a predetermined height.

The second stirring blade 33 is positioned at a height lower than that of the first stirring blade on the shaft and is formed to transfer the raw material in the reverse direction (from the outlet to the raw material inlet).

The second stirring blade 33 is formed in a spiral shape (reverse direction) while the lower end is coupled to the shaft by welding or the like, and the upper end is positioned below the lower end of the first stirring blade 32.

The continuous lime reactor of the present invention may control the feed rate or amount of transport in the reactor by adjusting the width, height, or pitch of the first stirring blade 32 and the second stirring blade 33.

That is, the continuous lime reactor of the present invention can maintain the reverse transfer speed of the second stirring blade at 60 to 80% compared to 100% of the forward transfer speed of the first stirring blade. For example, if the width of the first stirring blade is larger than the width of the second stirring blade, the forward conveying amount can be increased, and when the pitch of the first stirring blade is larger than the pitch of the second stirring blade, the forward conveying amount can be increased. have.

A plurality of paddles 34 are positioned on the shaft at predetermined intervals. The paddles have a plate-shaped structure and may mix organic wastes left and right as the shaft rotates.

The second screw 40 includes a shaft 41, a first stirring blade 42, a second stirring blade 43, and a paddle 44.

The first stirring blade 42 is positioned at a predetermined height on the shaft and is formed to transfer the raw material in the reverse direction (from the outlet to the raw material inlet). The first stirring blade 42 is formed in a spiral shape, and is spaced apart from the shaft to a predetermined height.

The second stirring blade 43 is positioned on the shaft at a height lower than that of the first stirring blade and is formed to transfer the raw material in a forward direction (from the raw material inlet to the outlet).

The second stirring blade 43 is formed in a spiral shape (reverse direction) while the lower end is coupled to the shaft by welding or the like, and the upper end is positioned below the lower end of the first stirring blade 42.

The continuous lime reactor of the present invention may control the transfer speed or amount of transfer in the reactor by adjusting the width, height, or pitch of the first stirring blade 42 and the second stirring blade 43.

That is, the continuous lime reactor of the present invention can maintain the reverse transfer speed of the first stirring blade 42 at 60 to 80% compared to 100% of the forward transfer speed of the second stirring blade 43.

A plurality of paddles 44 are disposed on the shaft at predetermined intervals. The paddles have a plate-shaped structure and may mix organic wastes left and right as the shaft rotates.

The screws 30 and 40 may include plate-shaped blades 35 and 45 attached to the blade surface of the first stirring blade at predetermined intervals.

5, the plate-shaped blades 35 and 45 have a width (a) of 50 to 150 mm, preferably within 100 mm, a length of 30 to 100 mm, preferably within 50 mm, and a thickness of 6 to 20 mm, preferably Can be around 10mm. The plate-shaped blade may be thicker than the thickness of the first stirring blade.

The plate-shaped blades 35 and 45 may be bolted to the first stirring blade at intervals of 200 to 400 mm.

The plate-shaped blades 35 and 45 are cemented carbide blades, and may prevent (delay) abrasion of the stirring blades and provide a pulverizing function.

The outlet portion 50 is formed on the rear side of the housing to discharge the lime-reacted product. The outlet portion may be a hole through which a product can be discharged at the rear bottom of the housing or an outlet pipe communicating with the hole. The outlet portion may be located above the collection portion 300 to be described later or may be connected to the collection portion.

The driving parts 60 and 70 are positioned outside the housing to drive the two screws 30 and 40, respectively. A known device for rotating the shaft may be used for the driving unit without limitation. For example, the driving unit may include a motor (not shown), sprockets 61 and 71, and bearings 62 and 72. The rotational force of the motor can be transmitted to the shaft through reduction gears, chains (belts), sprockets and bearings.

The continuous lime reactor of the present invention may further include a control unit (not shown) that controls the number of rotations of the motor.

The controller may control the number of revolutions by adjusting an inverter installed in the motor.

The control unit may increase pulverization and mixing efficiency by rotating the first screw and the second screw at different speeds.

The continuous lime reactor of the present invention may have a heating means outside the housing.

The heating means may be a double jacket surrounding the housing. The continuous lime reactor of the present invention can maintain an appropriate temperature (100 ~ 150 ℃) of the housing by circulating hot water and cold water respectively in the double jacket.

The heating means may be a heating wire surrounding the housing. For example, the heating means may include a heating wire, an insulating material covering the heating wire, and a protective plate.

The continuous lime reactor of the present invention may include a temperature sensor that measures the temperature inside the housing.

Referring to Figure 1, the continuous lime reaction system of organic waste of the present invention is a screw mixer 200 for mixing organic waste, quicklime and additives, a continuous lime reactor 100 located at the rear end of the screw mixer, and the continuous It may include a collection unit 300 located at the rear end of the type lime reactor.

As the screw mixer 200, a known screw mixer may be used without limitation. The discharge part of the screw mixer may be located above the raw material inlet part 20 of the continuous lime reactor 100 or may be connected to the raw material inlet part by a pipe or the like.

The system of the present invention includes a first hopper 210 for supplying organic waste to the screw mixer, a second hopper 220 for supplying slaked lime, and a third hopper 230 for supplying additives.

The collection unit 300 may be a conveyor belt.

In the above, preferred embodiments of the present invention have been described in detail, but these are only for the purpose of explanation, and the scope of protection of the present invention is not limited thereto.

10: housing 20: raw material inlet
30: first screw 40: second screw
50: outlet part 60, 70: drive part
100: continuous lime reactor
200: screw mixer
300: collection section

Claims (5)

Housing 10;
A raw material inlet 20 into which raw materials including organic waste and quicklime are injected into one side of the housing;
A first screw 30 and a second screw 40 positioned inside the housing to stir and react the raw material;
An outlet portion 50 formed on the other side of the housing to discharge a lime-reacted product; And
It includes two driving units (60, 70) located on the outside of the housing to drive the two screws, respectively,
The two screws 30, 40 are located side by side in parallel,
The first screw (30) and the second screw (40) are each shaft (31, 41), a first stirring blade (32, 42) formed to transfer the raw material in the forward direction by being positioned at a predetermined height on the shaft, the shaft Including a second stirring blade (33, 43) positioned at a height lower than that of the first stirring blade to transfer raw materials in the reverse direction, and a plate-shaped paddle (34, 44) positioned at predetermined intervals on the shaft. Continuous lime reactor for organic waste. Housing 10;
A raw material inlet 20 into which raw materials including organic waste and quicklime are injected into one side of the housing;
A first screw 30 and a second screw 40 positioned inside the housing to stir and react the raw material;
An outlet portion 50 formed on the other side of the housing to discharge a lime-reacted product; And
It includes two driving units (60, 70) located on the outside of the housing to drive the two screws, respectively,
The two screws 30, 40 are located side by side in parallel,
The first screw 30 is a shaft 31, a first stirring blade 32 positioned at a predetermined height on the shaft to transfer raw materials in a forward direction, and positioned at a lower height than the first stirring blade on the shaft. It includes a second stirring blade 33 formed to transfer the raw material in the reverse direction and a plate-shaped paddle 34 positioned at predetermined intervals on the shaft,
The second screw 40 is a shaft 41, a first stirring blade 42 formed to transfer raw materials in a reverse direction by being positioned at a predetermined height on the shaft, and positioned at a lower height than the first stirring blade on the shaft. A continuous lime reactor for organic waste comprising a second stirring blade (43) formed to transfer raw materials in a forward direction and a plate-shaped paddle (44) positioned at predetermined intervals on the shaft. The organic material according to claim 1 or 2, wherein the screw (30, 40) further comprises a plate-shaped carbide blade (35, 45) attached to the top of the first stirring blade at predetermined intervals. Waste continuous lime reactor. The method of claim 1 or 2, wherein the lime reactor adjusts the width, height, or pitch of the first stirring blade and the second stirring blade to adjust the reverse transfer speed of the second stirring blade to a forward transfer speed of 100 of the first stirring blade. A continuous lime reactor for organic waste, characterized in that maintaining the percentage of 60 to 80%. A screw mixer 200 for mixing organic waste, quicklime, and additives;
A continuous lime reactor 100 according to any one of claims 1 to 4 located at the rear end of the screw mixer; And
A continuous lime reaction system for organic waste comprising a collection unit 300 located at the rear end of the continuous lime reactor.

Images