KR102411796B1 - Sludge drying device producing side air flow and sludge drying method thereusing - Google Patents

Abstract

The present invention provides a refrigeration cycle for generating low-temperature dry air, a blower for guiding dry air generated by the refrigeration cycle, a dry air inlet for introducing the dry air induced by the blower into a drying chamber, and the drying chamber. A ventilated conveyor that disperses the dry air introduced into the dryer throughout the drying chamber for drying, and the temperature of the dry air introduced into the drying chamber through the dry air inlet after being generated by the refrigeration cycle and induced by the blower and the sludge is dried. A sludge drying apparatus comprising first and second temperature sensors for detecting the temperature of dry air returning to the refrigerating cycle afterward, and a humidity sensor for detecting the humidity of the drying room, which is generated by the refrigerating cycle and is generated by a blower into the drying chamber by a blower. A refrigeration cycle and a blower are disposed in the lower part of the drying chamber so that the induced dry air rises along the side of the drying chamber to form an airflow to dry the sludge, and a wide damper is configured to control the inflow of dry air toward the ventilated conveyor. Disclosed is a sludge drying device for forming a side airflow.

Description

Sludge drying device for forming side airflow and sludge drying method using the same

The present invention relates to a sludge drying apparatus for forming a side airflow and a sludge drying method using the same.

The problem of sludge treatment, which is increasing every year, is an environmental and social issue, and various treatment technologies have been developed and applied to the field.

Therefore, there is an urgent need to develop a new technology tailored to the field that can overcome the limitations of the existing hot air drying method.

At present, environment-oriented European advanced countries are applying a new technology of low-temperature drying rather than hot-air drying to minimize environmental pollution sources such as odors and dust, and to greatly improve the operating efficiency of treatment plants, such as enhancing energy efficiency.

In order to introduce such advanced overseas technology, as a result of empirical tests at domestic sites, it is not suitable for domestic conditions such as the properties of sludge, so it is important to develop a low-temperature sludge drying technology suitable for Korea and apply it to small and medium-sized sewage and wastewater treatment plants. emerged as a top priority.

Sludge is a sediment that is generated by separating suspended solids from liquids through water purification and wastewater treatment, and is also called sludge.

Due to the moisture content of the sludge (more than 80%), perishability, pathogenicity, and the presence of harmful substances, potential environmental risks and technical problems of treatment are important. In particular, comprehensive measures are required in terms of environmental conservation and recycling of useful resources for the problem of sewage sludge treatment, which is generated in large quantities due to the increase in the amount of sewage and solid materials in the inflow sewage due to the maintenance of sewage pipelines and the increase in the supply rate of sewage. .

The amount of sewage treatment from sewage treatment plants across the country has increased rapidly in recent years and is in a state of saturation. The sludge generated in each area is transported and landfilled to each landfill. The transportation distance and the operation cost of the landfill are increasing rapidly. Even dewatered sludge is not easily mixed with general waste due to its high moisture content. Currently, sludge with a high water content is subject to various difficulties due to the conditions of loading into landfills nationwide.

In order to solve this problem, a sludge dewatering process is usually performed.

In general, the moisture content is reduced by using a mechanical dehydrator, and the general moisture content is very high at 82~85%.

Currently, the water content of dewatered sludge is high and environmental regulations are strengthened, and it is impossible to landfill or incinerate unless the moisture content is further reduced. It is reported that direct combustion proceeds smoothly as the moisture content must be maintained at about 65% during incineration to secure heat.

In addition to incineration, a hot air dryer that utilizes a high temperature of 100°C or higher is applied to recycle sludge. difficulties are being caused

As a specific prior art, there is Republic of Korea Patent Registration No. 10-2059959, which is a previously applied patent of the present applicant.

The patent relates to a sludge drying apparatus having a circulation type heat exchange structure, a drying chamber in which sludge is input and dried, a ventilation conveyor provided inside the drying chamber to move the input sludge, and cooling the air delivered from the drying chamber It consists of an air cooling unit, which receives and heats the air cooled by the air cooling unit, and a blower which moves the air heated by the air heating unit to the drying chamber.

However, in the above patent, not only the configuration of the blower for moving the air heated by the air heating unit to the drying chamber is common, but also the contact area of the air stream supplied to the drying chamber to the sludge is limited, so there was a lack of improving drying efficiency.

In addition, since there is no means for controlling the speed and direction of the drying air flowing into the drying chamber, it is insufficient to control the drying air appropriately according to the drying state of the sludge to improve the drying efficiency.

1. Republic of Korea Patent No. 10-2059959

The present invention has been made in order to improve the problems inherent in the prior art as described above, and an object of the present invention is to form a closed area by arranging a refrigeration cycle on the lower side and a drying chamber on the upper side so that the dry air generated in the refrigeration cycle is removed. An object of the present invention is to provide a sludge drying apparatus for forming a side airflow to flow along the inner surface of a drying chamber, and a sludge drying method using the same.

Another object of the present invention is to provide a sludge drying apparatus for forming a side airflow by configuring a wide damper at an inlet of drying air into a drying chamber to control the speed and direction of drying air, and a sludge drying method using the same.

Another object of the present invention is to provide a sludge drying apparatus for forming a side airflow and a sludge drying method using the same, in which the contact amount and contact time of drying air to the sludge are increased by configuring a three-stage air permeable conveyor in a movable manner is doing

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

The sludge drying apparatus for forming the side air flow of the present invention for achieving the above object is

A refrigeration cycle for generating low-temperature dry air, a blower for guiding the dry air generated by the refrigeration cycle, a dry air inlet for introducing the dry air induced by the blower into the drying chamber, A ventilated conveyor for dispersing the dry air throughout the drying chamber for drying, and a refrigeration cycle after drying the temperature and sludge of the drying air generated by the refrigeration cycle, induced by a blower and introduced into the drying chamber through the drying air inlet, and then refrigeration cycle. In the sludge drying apparatus comprising a temperature sensor for respectively sensing the temperature of the returned drying air, and a humidity sensor for sensing the humidity of the drying chamber,

A refrigeration cycle and a blower are disposed in the lower part of the drying chamber so that the drying air generated by the refrigeration cycle and guided to the drying chamber by the blower is dried while the airflow is formed along the side of the drying chamber, and the sludge is dried.

It is characterized in that a wide damper is configured to control the speed and direction of the drying air toward the air permeable conveyor.

In the present invention, the ventilation conveyor is composed of three stages, it is characterized in that the wide damper is configured to correspond to each of the three stages of the ventilation conveyor.

In the present invention, both the blower and the wide damper are controlled according to the results of processing and analysis of the detection signals of the temperature sensor and the humidity sensor, or only one of them is selectively controlled.

In the present invention, the refrigeration cycle is characterized in that the direct piping is configured so that the condensed water returns to the influent.

The sludge drying method using the sludge drying apparatus for forming a side airflow of the present invention for achieving the above object is

A first step of generating sludge dry air through a refrigeration cycle;

a second step of introducing the dry air generated by the refrigerating cycle through two blowers and introducing it into the drying chamber;

a third step of drying the sludge while the dry air guided to the drying chamber through the blower is dispersed by a three-stage air permeable conveyor;

a fourth step of determining the dry state of the sludge by the dry air dispersed by the air permeable conveyor;

a fifth step of controlling both the speed and direction of the dry air by the wide damper and the air volume by the blower according to the determination of the sludge dry state; and

A sixth step of determining whether drying is complete after drying is performed for a certain period of time in a state where both the speed and direction of the drying air and the air volume are controlled, and continuing or stopping drying according to the determination result; characterized.

In the present invention, the drying air flowing into the drying chamber is generated by a refrigeration cycle disposed below the drying chamber and guided by a blower, and then the sludge is dried while ascending along the side of the drying chamber.

In the present invention, the dry air flowing into the drying chamber is characterized in that the air volume is changed while the air volume of the two blowers having the same or different air volume is controlled all or selectively depending on the drying state of the sludge.

In the present invention, both the speed and direction of the wide damper of the dry air flowing into the drying chamber are controlled according to the drying state of the sludge, and both the speed and the direction are controlled, or only one of them is selectively controlled.

According to the sludge drying apparatus for forming a side airflow and the sludge drying method using the same of the present invention, odor is minimized by inactivation of odor-generating atoms through low-temperature drying using a refrigeration system, and high-calorie sludge and summer heatwave by using a refrigeration system system incompleteness can be resolved.

In addition, the drying efficiency can be maximized by forming a closed area by arranging a refrigeration cycle and a blower on the lower side and a drying chamber on the upper side, and forming an airflow in which the dry air generated in the refrigeration cycle rises along the inner surface of the drying chamber.

In addition, the drying efficiency can be improved by maximizing the contact area and contact time of the dry air to the sludge by configuring the three-stage air permeable conveyor as a movable type.

In addition, by configuring a wide damper at the inlet of the dry air into the drying room, it is possible to induce recovery of non-mixing air and increase in rotational force of wet air for each floor of the three-stage ventilated conveyor.

In addition, the optimum drying effect can be achieved by allowing the speed and direction of the drying air to be controlled according to the drying state of the sludge by the wide damper.

In addition, the effect of direct drainage of condensed water and convection airflow can be improved by the lower heat exchanger method. River pollution sources can be addressed.

Other effects will be clearly recognized by those skilled in the art from the following description.

1 is a block diagram of a sludge drying apparatus for forming a side airflow according to an embodiment of the present invention.
Figure 2 is an exemplary view of the grinder of Figure 1.
Figure 3 is an exemplary view of the dispenser of Figure 1;
FIG. 4 is a view showing a side flow of dry air and a flow to a conveyor in the apparatus of FIG. 1 .
Figure 5 is an exemplary configuration of a direct pipe for returning condensed water in the refrigeration cycle of the sludge drying apparatus for forming a side airflow according to an embodiment of the present invention.
6 is a control configuration diagram of a sludge drying apparatus for forming a side air flow according to an embodiment of the present invention.
7 and 8 are flow charts of sludge drying operation using a sludge drying apparatus for forming a side airflow according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description.

However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention.

The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

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

1 is a block diagram of a sludge drying apparatus for forming a side airflow according to an embodiment of the present invention. Figure 2 is an exemplary view of the grinder of Figure 1. 3 is an exemplary view of the dispenser of FIG. 1 . FIG. 4 is a view showing a side flow of dry air and a flow to the conveyor in the apparatus of FIG. 1 . 5 is a diagram illustrating the configuration of a direct pipe for returning condensed water in the refrigeration cycle of the sludge drying apparatus for forming a side airflow according to an embodiment of the present invention. 6 is a control block diagram of a sludge drying system for forming a side air flow according to an embodiment of the present invention. 7 and 8 are flowcharts of sludge drying operation using a sludge drying apparatus for forming a side airflow according to an embodiment of the present invention.

1 to 6, the sludge drying apparatus for forming the side airflow of the present invention is divided into a zone where the refrigeration cycle 100 is configured and a zone where the drying room is configured, and the refrigeration cycle 100 and a blower ( 200) is located at the lower side of the drying chamber, so that the drying air generated in the refrigeration cycle 100 through the filter 110 is formed while drying is formed while riding up the side of the drying chamber.

That is, the refrigeration cycle 100 is arranged on the lower side and the drying chamber is closed on the upper side, and the drying efficiency is maximized by allowing the dry air generated in the refrigeration cycle 100 to flow along the inner surface of the sealed drying chamber 2 .

The sludge drying apparatus of the present invention includes a blower 200 having a fan rotating at a constant speed so that the dry air generated in the refrigeration cycle 100 can be circulated smoothly inside the sludge drying apparatus.

Two blowers 200 may be configured, and the air volume may be the same or different. In addition, the blower 200 may have a predetermined inclination angle so that the dry air that has passed through the refrigerating cycle 100 flows into the drying chamber without loss, and is configured to be in close contact with the dry air inlet 300 .

That is, the dry air flows into the drying chamber through the dry air inlet 300 , and the dry air that has passed through the refrigeration cycle 100 is installed to face the dry air inlet 300 without loss as much as possible.

In this case, the angle between the blower 200 and the dry air inlet 300 for forming the side airflow may be about a 30° gradient angle.

Two blowers 200 may be configured to rotate and drive at the same time depending on the sludge condition in the drying chamber, or optionally only one of the blowers 200 may be rotationally driven. The blower 200 is driven under the control of the controller. That is, the control unit 10 processes the detection signals by the temperature sensors 11 and 12 for detecting the internal temperature of the drying room and the humidity sensor 13 for detecting the humidity, and according to the processing result, the amount of drying air flowing into the drying room is adjusted. When it is determined that adjustment is necessary, the blower 200 is controlled.

The sludge drying apparatus of the present invention is formed in the front part of the blower 200, that is, close to the fan that discharges the dry air, and introduces the dry air induced by the blower 200 into the drying chamber. is composed

The dry air inlet 300 is formed in a size that can cover the wind direction range of the dry air discharged from the blower 200 .

In the sludge drying apparatus of the present invention, the ventilation conveyor 400 for automatically and continuously transporting the sludge is movable in a plurality of stages. Preferably, it consists of three stages. Therefore, the drying efficiency can be improved by maximizing the contact area and contact time with the drying air while the sludge passes through the three-stage air permeable conveyor continuously.

In the sludge drying apparatus of the present invention, a wide damper 900 corresponding to each air permeable conveyor is respectively configured to control the inflow of dry air toward the three-stage air permeable conveyor 400, and is introduced from the blower 200 along the side. By allowing the speed and direction of the rising drying air to be changed, the sludge can be dried more effectively.

The adjustment of the wide damper 900 follows the control of the controller 10 . That is, the control unit 10 processes the detection signal by the temperature sensors 11 and 12 for detecting the internal temperature of the drying room and the humidity sensor 13 for detecting the humidity, and according to the processing result, When it is determined that it is necessary to adjust the speed and direction, the wide damper 900 is controlled. To this end, the wide damper 900 includes a driving unit capable of processing the control signal of the control unit 10 .

In the present invention, a sludge agitating unit is configured to increase the contact area between the sludge and the dry air, and the sludge agitating unit is formed in the form of a plurality of rakes to pulverize the sludge put into the air permeable conveyor 400. A grinder 610 and, A distributor 620 that distributes the sludge that has passed through the grinder 610, and a rotary stirrer that agitates the sludge that has passed through the distributor 620 so that the interior of the relatively less dried sludge can be exposed to dry air (630).

The pulverizer 610 is disposed in the initial section of the air permeable conveyor 400 , and is a device for first pulverizing the sludge input to the air permeable conveyor 400 .

The distributors 620 are respectively installed on top of the plurality of air permeable conveyors 400 and are spaced apart from each other by a minimum distance that does not interfere with the air permeable conveyor 400 .

The distributor 620 is formed in a form in which a plurality of wedges are hung side by side in parallel, so that a furrow is formed in the sludge that is transported by the air permeable conveyor 400 and passes through the distributor 620 . Due to this, the problem that the sludge blocks the vent of the air permeable conveyor 400 is solved, and the dry air can be smoothly vented through the vent of the air permeable conveyor 400 .

The rotary stirrer 630 is installed at a position where the furrows of the sludge formed by the distributor 620 are torn down by drying, and is spaced apart by a minimum distance not to interfere with the air permeable conveyor 400 .

In addition, the rotary stirrer 630 more finely agitates the sludge that has passed through the distributor 620, and agitates the surface portion of the relatively dried sludge and the inside of the less dried sludge, so that the entire sludge is circulated. Allow exposure to air.

In the sludge drying apparatus of the present invention, a height adjustment guide installed at the upper portion of the air permeable conveyor 400 may be configured to guide the sludge input to the air permeable conveyor 400 to be spread to a predetermined height.

The height adjustment guide is installed on the upper portion of the air permeable conveyor 400, the cross section is formed in the shape of the alphabet 'J'. Therefore, the sludge transferred by the air permeable conveyor 400 and passed through the height adjustment guide is in contact with the lower surface of the height adjustment guide so that it can be compressed. That is, the height adjustment guide guides so that the height of the sludge passing through the height adjustment guide is equal to the height of the lower surface of the height adjustment guide, and the sludge can be spread widely. In addition, the height adjustment guide can adjust the height according to the moisture content of the sludge put into the air permeable conveyor (400).

The sludge drying apparatus of the present invention includes a first temperature sensor 11 for detecting the temperature at which the dry air generated through the refrigeration cycle 100 flows into the drying chamber through the dry air inlet 300, and the air permeable conveyor ( 400), the second temperature sensor 12 for detecting the temperature of the dry air returning to the refrigeration cycle 100 and the humidity sensor 13 for detecting the humidity of the drying room are configured.

In the sludge drying apparatus of the present invention, the control unit 10 for controlling the operation of the blower 200 by processing and analyzing the detection signals of the sensors 11, 12, 13 is configured.

The control unit 10 has a program for driving both blowers without considering the temperature and humidity in the drying room detected by the first and second temperature sensors 11 and 12 and the humidity sensor 13 during initial operation. can be saved.

In addition, the control unit 10 processes and analyzes the detection signals of the first and second temperature sensors 11 and 12 to drive both blowers or a program for selectively driving only one blower may be stored.

In addition, the controller 10 includes the temperature sensed by the first and second temperature sensors 11 and 12 , that is, the temperature of the dry air introduced into the drying chamber by the blower 200 and the temperature returned to the refrigeration cycle 100 . And, a program that processes and analyzes the humidity sensed by the humidity sensor 13 and drives both blowers or selectively drives only one blower by linking all of these signals may be stored.

In addition, the controller 10 includes the temperature sensed by the first and second temperature sensors 11 and 12 , that is, the temperature of the dry air introduced into the drying chamber by the blower 200 and the temperature returned to the refrigeration cycle 100 . And, a program for processing and analyzing the humidity sensed by the humidity sensor 13 and controlling the wide damper 900 by linking all of these signals may be stored.

The blower driving unit 20 shown in FIG. 6 drives both the first blower 210 and the second blower 220 or selectively drives only one blower under the control of the control unit 10 . That is, the control unit 10 processes and analyzes the temperature sensed by the first and second temperature sensors 11 and 12 and the humidity in the drying room sensed by the humidity sensor 13, and according to the analysis result, driving power saving and Since the drying operation is controlled to optimize the drying efficiency, the operation of the two blowers is appropriately controlled in consideration of the appropriateness of the temperature and the appropriateness of the humidity.

On the other hand, a laser sensor may be configured to detect the sludge height, and the control unit 10 may determine the sludge drying state according to the detection result, and then control the drying operation.

Next, an operation flow of drying the sludge using a drying device for forming a side air flow will be described with reference to FIG. 7 .

As shown in FIG. 8 before the operation of FIG. 7 is performed, when sludge is input (S100), the moisture inside the sludge is evaporated through heat exchange inside the housing (S200) (S300), and the evaporated moisture is condensed with a cooling heat exchanger After (S400), the operation of taking out the condensed water to the outside (S500) is preceded

The drying operation of the present invention shown in FIG. 7 includes a dry air generation step (S100), a dry air introduction step (S200), a sludge drying step (S300), a sludge dry state determination step (S400), and dry air A speed, direction, and air volume control step (S500) and a drying completion determination step (S600) may be performed.

Dry air generating step (S100) is a step of generating low-temperature air for drying the sludge through the refrigeration cycle (100).

The dry air introduction step (S200) is a step of introducing the dry air generated by the refrigeration cycle 100 into the drying chamber through the dry air inlet unit 300 . That is, the dry air generated by the refrigerating cycle 100 is guided through the blower 200 and introduced into the drying chamber through the dry air inlet 300 . At this time, the blower 200 is the first drying time, considering that the control unit (10) drives both blowers 210 and 220 so that all of the drying air flows into the drying chamber without loss.

The blowers 210 and 220 may have different air volumes, but the control unit 10 stores that the amount of air flowing into the drying room is introduced without loss when both blowers are driven, so both blowers are driven based on this. do.

In addition, each of the wide dampers 900 is completely opened so that the dry air introduced by the blower 200 and introduced into the drying chamber can be supplied to the maximum value toward the respective ventilation conveyors 400 .

This condition forms the airflow indicated in FIG. 4 .

The sludge drying step (S300) is a step of drying the sludge with dry air in a state in which both blowers 210 and 220 are driven and each wide damper 900 is opened to the maximum as described above.

The sludge dry state determination step (S400) is a step of determining whether the initially set speed, direction, and amount of dry air should be introduced while continuously maintained. That is, the sludge drying state is determined according to the initially set speed, direction, and amount of drying air.

The sludge dry state may be determined by humidity detection by the humidity sensor 13 . That is, the control unit 10 compares the humidity after a certain period of time with the initial humidity, and has a program for determining the sludge dry state according to the comparison result, so that the sludge dry state is determined based on this.

In addition, the sludge dry state may be determined by temperature sensing by the first and second temperature sensors 11 and 12 . That is, the control unit 10 compares the temperature of the initially introduced dry air to the temperature returned to the refrigeration cycle after drying the sludge, and has a program to determine the sludge dry state according to the comparison result, so the sludge dry state is determined based on this. .

As a result of the determination, when the sludge is dried to a certain extent, the inflow of dry air is controlled by controlling both the blower 200 and the wide damper 900 or controlling either the blower 200 or the wide damper 900. Controlled so that it can dry quickly and reduce driving power at the same time.

The drying air speed, direction, and air volume control step ( S500 ) is a step of controlling the speed, direction and amount of dry air flowing into the drying chamber by the control unit 10 .

The control unit 10 analyzes the temperature values sensed by the first and second temperature sensors 11 and 12 and the humidity values sensed by the humidity sensor 13 and compares them with each other, and determines the amount of dry air according to the comparison result. can be controlled

That is, the amount of dry air can be controlled according to how the humidity value sensed by the humidity sensor 13 compared to the temperature value sensed by the first and second temperature sensors 11 and 12 changes. For example, if the humidity changes very quickly (if it becomes low) than expected, only the blower with the smallest air volume out of the two blowers can be driven to control the dry air volume. At this time, each of the wide dampers 900 maintains the initially set value.

Alternatively, each of the wide dampers 900 can be controlled to adjust the speed and direction of the dry air, for example, when the humidity changes (lower) very quickly than expected. At this time, the blowers 210 and 220 maintain the initially set state.

The drying completion determination step (S600) is a step of determining whether drying is complete when a predetermined time elapses after controlling the drying air, speed, direction and amount,

Such determination may be determined by, for example, the humidity sensed by the humidity sensor 13 . That is, since the control unit 10 stores the initial humidity before the dryer and the humidity after drying is completed, the control unit 10 analyzes the humidity input through the humidity sensor 13 in real time to determine whether the sludge drying is complete. will do

As described above, in the detailed description of the present invention, a preferred embodiment of the present invention has been described, but this is an exemplary description of the preferred embodiment of the present invention and does not limit the present invention. In addition, various modifications and imitations are possible without departing from the scope of the technical idea of the present invention by anyone with ordinary skill in the art to which the present invention pertains.

Accordingly, the scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. And without departing from the gist of the present invention claimed in the claims, it is considered to be within the scope of the description of the claims of the present invention to the various extents that can be modified by anyone with ordinary knowledge in the technical field to which the invention pertains.

An embodiment of an apparatus for implementing a sludge drying apparatus for forming a side air flow and a sludge drying method using the same has been described. The embodiments described above are illustrative of some of the many specific embodiments that represent the principles described herein. Accordingly, by using the embodiments of the present invention, those skilled in the art will be able to easily realize many other arrangements within the scope defined by the claims of the present invention.

10: control unit 11, 12: temperature sensor
13: humidity sensor 20: blower driving unit
100: refrigeration cycle 200, 210, 220: blower
300: dry air inlet 400: breathable conveyor
600: sludge stirring unit 700: height adjustment guide
900: wide damper

Claims (8)

A refrigeration cycle for generating low-temperature dry air, a blower for guiding the dry air generated by the refrigeration cycle, a dry air inlet for introducing the dry air induced by the blower into the drying chamber, A ventilation cycle for dispersing the dry air throughout the drying chamber for drying, and a refrigeration cycle after drying the temperature and sludge of the drying air generated by the refrigeration cycle and guided by a blower and introduced into the drying chamber through the drying air inlet. In the sludge drying apparatus comprising first and second temperature sensors for respectively sensing the temperature of the returning dry air, and a humidity sensor for sensing the humidity of the drying room,
A refrigeration cycle and a blower are disposed in the lower part of the drying chamber so that the drying air generated by the refrigeration cycle and guided to the drying chamber by the blower is dried while the airflow is formed along the side of the drying chamber, and the sludge is dried.
A sludge drying apparatus for forming a side air flow, characterized in that a wide damper is configured to control the speed and direction of the drying air toward the air permeable conveyor.
The method according to claim 1,
The ventilation conveyor is composed of three stages, and a sludge drying apparatus for forming a side airflow, characterized in that the wide dampers are configured to correspond to the three stages of the ventilation conveyor, respectively.
The method according to claim 1,
The blower and the wide damper are all controlled or selectively controlled according to a result of processing and analyzing the detection signals of the first and second temperature sensors and the humidity sensor, or only one of them is selectively controlled.
The method according to claim 1,
The refrigeration cycle is a sludge drying device for forming a side air flow, characterized in that the direct piping is configured so that the condensed water returns to the influent.
A first step of generating sludge dry air through a refrigeration cycle;
a second step of introducing the dry air generated by the refrigeration cycle through two blowers and introducing it into the drying chamber;
a third step of drying the sludge while the dry air guided to the drying chamber through the blower is dispersed by the three-stage air permeable conveyor;
a fourth step of determining the dry state of the sludge by the dry air dispersed by the air permeable conveyor;
a fifth step of controlling both the speed and direction of the dry air by the wide damper and the air volume by the blower according to the determination of the sludge dry state; and
A sixth step of determining whether drying is complete after drying is performed for a certain period of time in a state where both the speed and direction of the drying air and the air volume are controlled, and continuing or stopping drying according to the determination result; A sludge drying method using a sludge drying device that forms a side air flow, characterized in that
6. The method of claim 5,
The drying air flowing into the drying chamber is generated by a refrigeration cycle disposed below the drying chamber and guided by a blower, and then dispersed while ascending along the side of the drying chamber to dry the sludge. A method of drying sludge using a drying device.
6. The method of claim 5,
Drying air flowing into the drying chamber is sludge drying method using a sludge drying device for forming a side air flow, characterized in that the air volume is changed while the two blowers having the same or different air volumes are controlled all or selectively depending on the sludge drying state.
6. The method of claim 5,
A sludge drying method using a sludge drying device for forming a side airflow, characterized in that the speed and direction of the drying air flowing into the drying chamber are controlled by a wide damper according to the drying state of the sludge.

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