KR20130002305A - Sludge flash dryer - Google Patents

Abstract

PURPOSE: A sludge flash dryer is provided to operate facilities in a cost effective manner and fuelize dried sludge by dehydrating sludge at low cost. CONSTITUTION: A sludge flash dryer includes a drying unit(100) and a hot wind supplying unit. The drying unit includes a main body(101), a hot wind supplying chamber(103), a hot wind dispersing nozzle(104), a pulverizer(105), a plurality of colliding plates(116), a first driving motor(107), a first driving shaft(108), a classifier(110), a second driving motor, and a second driving shaft. The hot wind supplying chamber is installed at the lower part of the main body. The hot wind dispersing nozzle is installed in the main body. The pulverizer is formed by the hot wind dispersing nozzle and a plurality of pulverizing blades. The colliding plates are installed on the inner wall of the main body which faces the pulverizing blades. The first driving motor and the first driving shaft rotate the pulverizer. The classifier adjusts the sizes of the dried particles. The second driving motor and the second driving shaft drive the classifier. [Reference numerals] (AA) Discharging gas and dried sludge(cyclone)

Description

Sludge Airflow Dryer {SLUDGE FLASH DRYER}

The present invention relates to a sludge airflow dryer, and more specifically, to disperse the dried mass and supply it to the inside of the dryer, and with the hot air while turbulent flow (Diffusion in turbulent flow) of the small particles by the instant crushing process The present invention relates to a low-efficiency, high-efficiency sludge airflow dryer that performs rapid drying in the form of a VORTEX MOTION transfer along the inner wall of the dryer body and adjusts the size of particles through a simultaneous classifier.

Countries around the world have been discouraging marine waste emissions and are restraining ocean emissions through the continuous use of land treatment resources. In terms of domestic treatment related to sewage sludge generation, sewage sludge generation is increasing every year.

In order to prepare a plan for the treatment of sewage sludge in the medium and long term, the land treatment facilities have been installed and measures have been taken in accordance with the regulation of marine discharges, but domestic technology is still inadequate.

In the past, many technologies have been developed in Korea for the sewage sludge land treatment, but there are still many problems in the treatment method.

Firstly, the domestic technology of the sludge dryer has a high energy cost and the sludge treatment cost is high because it is dried at a drying temperature above 800 ℃. Second, the operation of the sludge dryer is very complicated and the facility management is difficult. The cost of facility management is also very high.

Disclosure of Invention An object of the present invention is to provide a sludge airflow dryer capable of carrying out high efficiency drying at a low energy cost.

It is another object of the present invention to provide a sludge airflow dryer which enables constant control of the particle size of a dry matter in order to maintain rapid drying and constant moisture content.

In order to achieve the above object, the sludge airflow dryer according to the present invention is a sludge airflow dryer having a drying device and a hot air supply device, the drying device,

main body; A hot air supply chamber installed below the main body to supply hot air for drying; A hot air dispersion nozzle installed inside the main body to disperse and supply hot air and to disperse the crushed sludge; A grinder combined with a hot air dispersing nozzle and a plurality of grinding blades in an upper portion of the hot air supply chamber and in the main body to grind sludge; A plurality of crushing collision plates installed on an inner wall of the main body facing the crushing blade; A first driving motor and a first driving shaft for rotating the mill in which the hot air dispersion nozzle and the grinding blade are combined; A classifier installed at the top of the main body to discharge and control the size of the dry matter particles; And a second driving motor and a second driving shaft for driving the classifier.

The pulverizer is characterized in that the hot air dispersing nozzle and the grinding blade are combined into one unit, and a plurality of crushing collision plates are fixed to the inner circumferential surface of the main body facing the side circumferential surface of the hot air dispersing nozzle.

The grinder is characterized in that it is installed in the shape of a triangular cone.

The classifier is a reverse conical grating structure, characterized in that the crushed sludge has a structure that can pass between the gratings.

The hot air dispersion nozzle is characterized by consisting of a plurality of perforations for dispersing hot air.

The hot air supply device, press-fit blower for supplying odor air to the front end of the main body of the hot air supply device; A burner chamber in which a burner is built into the main body of the hot air supply device; Odor air combustion chamber for burning odor air; And a heat medium used for combustion and pyrolysis to improve thermal efficiency and odor.

It is characterized in that it further comprises a quantitative supply device for supplying sludge to the drying device in a quantitative manner.

The metering supply device, the sludge storage tank receiving the sludge from the outside; A top spreader for firstly dispersing the supplied sludge; A subdivider for dispersing sludge secondly; A third drive motor and a third drive shaft for driving the upper and lower part diffusers; A screw feeder for quantitatively supplying sludge to the drying apparatus; And a fourth driving motor and a fourth driving shaft for driving the screw feeder.

The sludge storage tank has a vertical cylindrical shape, the bottom structure is a flat circular shape, the bottom portion is formed to be an eccentric opening in the direction of the screw feeder, the screw feeder is installed so as to match the bottom opening of the sludge storage tank do.

The upper disperser and the lower part disperser are composed of a two-stage stirring blade structure separated up and down, and the lower disperser is installed in close contact with the stirring blade in a flat circular bottom structure of the sludge storage tank.

According to the present invention, the dehydration sludge with moisture is dried at a low energy cost to fuel the dry sludge, and there is an effect of performing high efficiency drying so that the facility can be operated at a minimum operating cost.

1 is a view of a sludge airflow dryer according to the present invention.
2 is a view showing a drying apparatus in the airflow dryer of FIG.
Figure 3 is a front sectional view showing an enlarged crusher and a crushing crash plate in the drying apparatus of the present invention.
Figure 4 is an enlarged plan view showing a crusher and a crushing crash plate in the drying apparatus of the present invention.
FIG. 5 is a view illustrating a hot air supply device in the airflow dryer of FIG. 1.
6 is a view showing a sludge metering supply device in a sludge airflow dryer according to the present invention.
FIG. 7 is a cross-sectional view taken along line AA of the quantitative feeding device of FIG. 6.
8 is a cross-sectional view taken along the line BB in the metering supply device of FIG.

First, the main features of the present invention are as follows.

The dry matter (dehydrated sludge with moisture) is supplied to the sludge storage tank attached to one side of the dryer, and an agitator disposed inside the sludge storage tank disperses the mass of the dry matter and uniformly distributes the dry matter to the screw feeder installed at the bottom. It serves as a quantitative supply. In particular, the lower disperser serves to fill the dry matter in a predetermined amount in the direction of the screw feeder connected to the opening of the lower bottom of the sludge storage tank while rotating by adhering the lower disperser stirring blade to the flat bottom of the sludge storage tank. The dry matter filled in the screw feeder is quantitatively supplied to the drying apparatus.

Sludge is crushed by the rotation of the grinder installed in the lower part of the drying device, and the sludge is increased in surface area and inside the drying device at the same time as a heater or burner. Rapid drying proceeds in contact with the hot air supplied to the furnace.

The hot air supplied to the drying apparatus main body is generated by heating the heat medium installed inside the hot air supply device with a burner, and the generated hot air thermally decomposes odorous air moving between the heat medium to remove odors and blows it into the drying device to blow dry air. Used as

Dried particles, which are reduced by the instant crushing process inside the drying device, are diffused in turbulent flow, undergo a VORTEX MOTION along the inner wall of the drying device along with the hot air, and are transferred to the upper classifier. Proceed.

The dry matter is classified by passing through the lattice of the classifier installed in the upper part of the drying device. The small centrifuge passes between the lattice and the collecting device by applying the centrifugal force of the classifier and the suction force sucked from the exhaust fan. Large dry matter particles do not pass through the classifier but fall down and are crushed again.

The dry matter smaller than the centrifugal force of the classifier passes through the classifier and is transferred to the collecting device (CYCLONE or BAG-FILTER) together with the hot air flow, and the dry particles collected in the collecting device are passed through a rotary valve or a screw conveyor under the collecting device. The exhaust gas is discharged to the outside through the bag filter.

The drying device is composed of two stages of vertical cylinders. The dry material supplied from the fixed quantity supply device formed on one side of the drying device is supplied to the lower part of the drying device, and the dry material supplied to the lower part is dropped into the grinder, and the rotary centrifugal force It is pulverized by a crushing collision plate attached to the inner wall of the drying apparatus, and the pulverized dry matter is transferred from the lower part to the upper part along the air flow turning in the direction of rotation of the pulverizer in contact with hot air supplied from one side of the lower part of the drying machine, and transferred to the classifier. The transported dry particles are classified through the diaphragm of the classifier, and the dry matter passed through the classifier is transferred to the collecting device, and the large particles which do not pass through the classifier are settled to the bottom and dried while regrind in the grinder.

In order to make the particles of the dry matter constant, the reverse cone-shaped lattice structure serves to adjust the size of the dry matter in the classifier built in the upper part of the drying apparatus. The number of revolutions of the classifier and the size of the dry matter are inversely proportional to the variable speed of the classifier drive shaft. That is, the size of the classifying particles decreases as the number of revolutions of the classifier increases, and the classifying particles become large when the number of revolutions decreases.

In general, the flow of the dry items in the drying device is described. The dry goods supplied into the drying device through the fixed-quantity feeding device are crushed by contacting the hot air flowing from one side of the lower part of the drying device and colliding with the high-speed rotating grinder and the crushing collision plate. It is dried.

The pulverized dried product is transferred to a classifier located in the upper portion along the air flow turning in the rotational direction of the mill, and the transferred dry matter is classified while passing through the diaphragm of the classifier.

In the present invention, high efficiency drying can be performed at low energy cost.

Hereinafter, a sludge airflow dryer according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view of a sludge airflow dryer according to the present invention, Figure 2 is a view showing a drying apparatus in the airflow dryer of FIG.

As shown in FIG. 1, the sludge airflow dryer according to the present invention includes a drying device 100 and a hot air supply device 200 connected to a lower portion of the drying device to supply hot air.

As shown in Figure 1 and 2, the drying apparatus 100 is provided with a main body (101). The hot air supply chamber 103 is installed below the main body 101, and the hot air supply device 200 is coupled to the hot air supply chamber 103 through a hot air supply hole 102.

A grinder 105 is installed at an upper side of the hot air supply chamber 103 and inside the main body 101. On the circumferential outer circumferential surface of the grinder 105, a plurality of grinding blades 106 are spaced apart at regular intervals. On the circumferential outer circumferential surface of the crusher 105, a hot air dispersion nozzle 104 capable of dispersing the sludge at the same time as the crushing of the sludge is installed in a plurality of perforated shapes. On the inner wall of the main body 101 of the drying apparatus, which faces the outer peripheral surface of the crusher 105, a plurality of crushing collision plates 116 are provided to face the crushing blade 105.

The grinder 105, the hot air dispersion nozzle 104 and the grinding blade 106 are combined into one unit, and rotated by the first driving motor 107 and the second driving shaft 108 provided at the lower end thereof. do. The first drive motor 107 and the first drive shaft 108 is connected to the V-belt is configured to adjust the number of revolutions by the inverter drive method.

Therefore, the sludge is pulverized by the rotation of the pulverizer 105 and the crushing blade 106, and in addition, the sludge may be further crushed by colliding with the crushing collision plate 116.

The lower part of the main body 101 and the sludge inlet 109 for supplying the dry object is formed in the upper portion of the crusher 105, the sludge inlet 109 is coupled to the sludge metering supply to be described below do.

The upper part of the main body 101 is provided with a classifier 110 for discharging by adjusting the size of the dry particles, the second drive motor 111 and the second drive shaft (11) for driving the classifier 110 ( 112 is installed. The second driving motor 111 and the second driving shaft 112 is connected to the V-belt is configured to adjust the rotation speed by the inverter drive method.

A gas and dry sludge discharge port 113 for transferring the dry matter and gas to a sludge collecting device (not shown) is formed at an upper side of the main body 101.

In addition, a pressure gauge 114 for maintaining a constant internal pressure of the drying apparatus 100 is installed inside the main body, and an outlet gas temperature gauge 115 for efficiently using a hot air heat source in the drying chamber is provided. It is installed in the gas and dry sludge discharge port 113.

The classifier 110 may be discharged by adjusting the particle size of the dry matter is built on the main body 101 in an inverted conical lattice structure. The classifier has a structure in which a central portion thereof is connected to the second drive shaft 112 and a plurality of grids are installed vertically so that the pulverized dry material can pass between the grids.

The number of revolutions of the classifier 110 and the size of the dry matter are inversely proportional. That is, when the number of revolutions of the classifier 110 is increased, the size of the particles passing through the classifier is reduced, and when the number of revolutions is reduced, the size of the particles passing through the classifier is increased.

Figure 3 is a front sectional view showing an enlarged crusher and a crushing impact plate in the drying apparatus of the present invention, Figure 4 is a plan view showing an enlarged crusher and crushing impact plate in the drying apparatus of the present invention.

3 and 4, the pulverizer 105 for pulverizing the dry matter, the hot air dispersion nozzle 104 for dispersing and supplying the dry hot air simultaneously with the dispersion of the pulverized sludge, and pulverizing the dry matter are carried out. The grinding blade 106 is to be combined into one unit to rotate together. In addition, a crushing collision plate 116 is provided on the inner wall of the main body 101 of the drying apparatus facing the crushing blade 106.

The circumferential side surface of the grinder 105 is formed in a plurality of hot air dispersion nozzles 104 perforated in order to disperse the hot air conveyed from the hot air supply chamber 103 to be transferred to the upper side.

The pulverizer 105 has a cylindrical shape and is installed in a triangular cone shape upward, the reason for the shape of the pulverizer 105 as a triangular cone structure is that the sludge is collected to the side of the pulverizer 105 and the grinding blade To facilitate the movement to the 106 and the crushing collision plate 116 to be crushed.

In addition, a plurality of grinding blades 106 are provided on the side circumferential surface of the hot air dispersion nozzle 104 at regular intervals, and a plurality of grinding blades 106 are disposed on the inner wall of the drying apparatus main body 101 facing the grinding blade 106. The crushed collision plate 116 is provided at regular intervals.

The pulverizer 105 in which the plurality of grinding blades 106 and the hot air dispersing nozzles 104 are combined is in close proximity to the crushing collision plate 116 while rotating and can easily grind the dry matter through such an opposing portion. .

Accordingly, the grinder 105 is rotated by the driving of the first driving motor 107 and the first driving shaft 108 to efficiently grind the dry matter between the inner wall of the main body 101 and the outside of the grinder 105. It can be.

The hot air supplied from the hot air supply device 200 is transferred to the hot air supply chamber 103 provided at one side of the lower portion of the main body 101 of the drying apparatus 100, and the supplied hot air is supplied to the grinder 105 and the hot air dispersion nozzle ( It is supplied to the inside of the main body 101 through 104 to disperse the dried object upwards and at the same time serves to dry it.

The dry sludge supplied into the main body 101 of the drying apparatus contacts the hot air flowing into the lower part of the main body 101 and collides with the pulverizing blade 106 and the crushing collision plate 116, which rotate at high speed, to be dried. Proceed.

The pulverized dried product is transferred to the upper classifier 110 along the air flow turning in the rotational direction of the pulverizer 105, and the transferred dry matter is classified by passing through the diaphragm of the classifier 110. The dry matter passing through the air supply 110 is transferred to a collecting device (not shown) through the discharge port 113, and large particles that do not pass through the classifier 110 are settled downward and pulverized again in the grinder 105. .

The sludge collection facility (Cyclone), the bag filter, the manned blower, etc., which have been removed from the above, are well known technologies, and detailed description thereof will be omitted.

FIG. 5 is a view illustrating a hot air supply device in the airflow dryer of FIG. 1.

1 and 5, the hot air supply device 200 according to the present invention includes a press-fit blower 202, a burner chamber 203, a malodorous air combustion chamber 204, and a heat medium 205. .

The hot air supply device 200 is a device for burning and pyrolyzing malodorous air by using hot air at the same time as supplying the hot air required for drying the dried object, a press-fit blower for supplying malodorous air to the front end of the main body of the hot air supply device 200. 202, a burner chamber 203 in which a burner is built into the main body of the hot air supply device 200, a odor air combustion chamber 204 for burning malodorous air, and a heat medium for improving thermal efficiency and odor for combustion and pyrolysis. 205 is provided and comprised together.

The hot air supply device 200 maintains a high temperature by heating the heat medium 205 embedded in the odor air combustion chamber 204 inside the main body with a burner, and blows odor air through the heated heat medium 205. 202 is blown and passed to burn odors, and the heat source of the burned gas is supplied to the main body 101 of the sludge drying apparatus as hot air and used as dry air to be dried.

The front end of the hot air supply device 200 may be further provided with a temperature gauge 206 for measuring the temperature of the hot air supplied and a pressure gauge 207 for measuring the pressure.

6 is a view showing a sludge metering supply device in a sludge airflow dryer according to the present invention, Figure 7 is a cross-sectional view taken along the line AA in the metering supply of Figure 6, Figure 8 is a metering supply of Figure 6 It is sectional drawing cut along the BB line.

6 to 8, the quantitative supply device 300 according to the present invention is largely, a sludge storage tank 301 receives sludge from the outside, the top disperser 302 for dispersing the supplied sludge first A lower feeder 303 for dispersing the sludge secondly, a third drive motor 304 and a third drive shaft 305 for driving the upper and lower feeders, and a screw feeder for supplying sludge to the drying apparatus in a fixed quantity; 306, and a fourth driving motor 307 and a fourth driving shaft 308 for driving the screw feeder 306.

The sludge storage tank 301, which is a device for storing the dry items to be supplied, has a bottom structure of vertical cylindrical shape and flat circular shape. When the dry matter is supplied to the inside of the sludge storage tank 301, the dry mass of the dry matter is dispersed while the upper disperser 302 and the lower disperser 303 rotate together.

The upper disperser 302 and the lower part disperser 303 are composed of a two-stage stirring blade structure separated up and down, and in particular, the lower disperser 303 has the stirring blade in a flat circular bottom structure of the sludge storage tank 301. Configure closely. By doing so, the stirring blade of the lower part acidizer 303 rotates and serves to fill the dry matter to the inside of the screw feeder 306 by a predetermined amount (quantitative supply).

At this time, an opening 117 is formed at the bottom of the sludge storage tank 301 so as to be eccentrically in the direction of the fixed-quantity feeding screw feeder 306, and the lower part diffuser 303 rotates and the sludge storage tank is opened through the opening 117. The sludge of 301 is supplied to the screw feeder 306.

The screw feeder 306 is composed of a double screw type (Double Screw Type), it is installed to match the bottom opening of the sludge storage tank (301). By having such a configuration, the to-be-dried product dispersed by the lower partial acidizer 303 is supplied, and the supplied to-be-dried product can always be supplied to the inside of the main body 101 of the drying apparatus 100 in a fixed amount.

The screw feeder 306 is composed of two shafts to which the screw is attached, and the fourth drive shaft 308 is connected to the motor and the reducer by a chain. When the shaft is rotated by the fourth drive motor 307, the to-be-dried material is gradually engaged with the two screws on both sides of the metering feed screw feeder 306 and gradually transferred into the dryer.

The transfer amount of the dried object supplied to the drying apparatus 100 is controlled and supplied in proportion to the rotational speed of the screw, and the rotational speed of the fourth driving motor 307 of the fixed-quantity supply screw feeder 306 is a frequency converter (Inverter). This enables each operation in the manual / automatic operation mode of the drying apparatus.

Rotational speed by manually selecting a selector switch attached to a control panel for the manual mode of the fixed quantity feed screw feeder 306 to be dried and artificially adjusting the converter volume. To be variable.

In the automatic mode operation of the fixed-quantity supply screw feeder 306, when the selector switch attached to the control panel is selected as the automatic operation, the converter volume can be artificially adjusted. When (Selector Switch) is selected as the automatic mode, the temperature controller of the fixed-quantity supply screw feeder 306 is selected based on the set exhaust temperature detected by the temperature sensor of the outlet gas temperature gauge 115 attached to the drying device outlet 113. The speed of rotation can be adjusted automatically.

That is, the rotation speed of the fixed-quantity supply screw feeder 306 during the automatic operation of the drying apparatus 100 is proportionally controlled according to the drying apparatus exhaust gas temperature setting value. When the temperature of the drying device outlet gas temperature gauge 115 is greater than or equal to the controller setting value, the rotation speed of the inverter-type fourth drive motor 307 is increased to increase the input amount of the raw material, and the drying furnace outlet gas temperature gauge 115 may be When the temperature is lower than the set value, the input of the dry object is automatically controlled by reducing the rotational speed of the fourth driving motor 307 to reduce the input amount of the dry object.

100: drying apparatus 101: main body
103: hot air supply chamber 104: hot air supply nozzle
105: grinder 106: grinding blade
107: first drive motor 108: first drive shaft
110: classifier 113: outlet
116: crushing crash plate 117: opening
200: hot air supply device 202: press-fit blower
203: burner chamber 204: odor air combustion chamber
205: heating medium 300: metering device
301: sludge storage tank 302: upper disperser
303: sub acidizer 306: screw feeder

Claims (10)

A sludge airflow dryer having a drying device and a hot air supply device, wherein the drying device includes:
main body;
A hot air supply chamber installed below the main body to supply hot air for drying;
A hot air dispersion nozzle installed inside the main body to disperse and supply hot air and to disperse the crushed sludge;
A grinder combined with a hot air dispersing nozzle and a plurality of grinding blades in an upper portion of the hot air supply chamber and in the main body to grind sludge;
A plurality of crushing collision plates installed on an inner wall of the main body facing the crushing blade;
A first driving motor and a first driving shaft for rotating the mill in which the hot air dispersion nozzle and the grinding blade are combined;
A classifier installed at the top of the main body to discharge and control the size of the dry matter particles; And
And a second drive motor and a second drive shaft for driving the classifier. The method of claim 1,
The grinder is a sludge airflow dryer, characterized in that the hot air dispersion nozzle and the grinding blade are combined in one unit, a plurality of crushing collision plate is fixed to the inner peripheral surface of the main body facing the side circumferential surface of the hot air dispersion nozzle. The method of claim 1,
The sludge air dryer is characterized in that the triangular cone shape is installed. The method of claim 1,
The classifier is a reverse conical lattice structure, the sludge airflow dryer, characterized in that the crushed sludge has a structure that can pass between the lattice. The method of claim 1,
The hot air dispersion nozzle is a sludge air dryer, characterized in that consisting of a plurality of perforations for dispersing hot air. The method according to any one of claims 1 to 5,
The hot air supply device,
A press-fit blower which supplies malodorous air to the front end of the main body of the hot air supply device;
A burner chamber in which a burner is built into the main body of the hot air supply device;
Odor air combustion chamber for burning odor air; And
A sludge airflow dryer comprising: a thermal medium used for combustion and pyrolysis to improve thermal efficiency and odor. The method according to claim 6,
Sludge air flow dryer further comprises a quantitative supply device for supplying sludge to the drying device in a quantitative manner. 8. The method of claim 7,
The metered supply device,
A sludge storage tank receiving sludge from the outside;
A top spreader for firstly dispersing the supplied sludge;
A subdivider for dispersing sludge secondly;
A third drive motor and a third drive shaft for driving the upper and lower part diffusers;
A screw feeder for quantitatively supplying sludge to the drying apparatus; And
And a fourth driving motor and a fourth driving shaft for driving the screw feeder. The method of claim 8,
The sludge storage tank has a vertical cylindrical shape, the bottom structure is a flat circular shape, the bottom portion is formed with an opening eccentrically in the direction of the screw feeder,
And the screw feeder is installed to coincide with the bottom opening of the sludge storage tank. The method of claim 8,
The upper spreader and the lower partial spreader is composed of a two-stage stirring blade structure divided up and down,
The lower disperser is a sludge airflow dryer, characterized in that to install the stirring blade in close contact with the flat circular bottom structure of the sludge storage tank.

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