KR20070052903A - Dring unit for organic wastes disposal system - Google Patents

Abstract

The present invention relates to an organic waste treatment system having a drying unit;

The drying unit includes a drying tank containing sludge, a stirring screw installed inside the drying tank to stir the sludge, and a drying tank installed under the drying tank to heat the drying tank as it passes through a high temperature heat medium. A heat jacket, a hot air outlet located above the drying tank, a refrigerant gas heat exchanger for heat-exchanging heat discharged from the hot air outlet at a low temperature, and blows heat from the hot air outlet to a refrigerant gas heat exchanger. And at the same time it relates to a drying unit for an organic waste treatment system comprising a blower for blowing the dry air dehumidification is completed from the refrigerant gas heat exchanger into the drying tank.

In addition, the present invention is a hopper unit having a stirrer and discharger for stirring and forcibly discharging the sludge therein, an ultrasonic wave generating unit for destroying the floc from the sludge by ultrasonic waves, and a dehydrator for dehydrating the water contained in the sludge And a heavy metal removal unit for neutralizing heavy metals contained in the sludge by mixing microorganisms, and a drying unit for drying the sludge.

The drying unit includes a drying tank containing sludge, a stirring screw installed inside the drying tank to stir the sludge, and a drying tank installed under the drying tank to heat the drying tank as it passes through a high temperature heat medium. A heat jacket, a hot air outlet located above the drying tank, a refrigerant gas heat exchanger for exchanging heat discharged from the hot air outlet to a low temperature, and blowing heat from the hot air outlet to a refrigerant gas heat exchanger. And a blower for blowing air dehumidified from the refrigerant gas heat exchanger into the drying tank at the same time as the zoom.

Organic waste, treatment equipment, treatment method, sewage sludge, wastewater sludge, (dam, reservoir, lake, marine) sediment

Description

Drying unit for organic waste disposal system

1 is a block diagram showing an example of an organic waste treatment system

2 is a front view of the drying unit according to the present invention;

Figure 3 is a state in which a plurality of drying units installed in accordance with the present invention installed

4 is a system diagram of a heat exchanger in a drying unit according to the present invention.

5 is a detailed configuration diagram of a drying unit according to the present invention

6 is a relationship between the evaporative heat exchanger and the heat exchanger tube in the drying unit according to the present invention

<Explanation of symbols for the main parts of the drawings>

100: drying unit 110: drying tank

111: hot air outlet 112: dry air supply pipe

130: heating jacket 140: air filter

150: refrigerant gas heat exchanger 151: compressor

152: condensation heat exchanger 153: expansion valve

154: evaporative heat exchanger 155: heat exchanger tube

156: hot exhaust pipe 157: diaphragm

158: condensate receiving 158a: condensate outlet

160: blower

The present invention relates to a drying unit for converting sludge into compost or vegetation soil in an organic waste treatment system. More specifically, the sludge in a drying tank is indirectly heated by a heat medium supplied from a boiler or the like, and in a tank generated during heating. High temperature air is led to a heat exchanger (cooler) installed outside the tank to allow drying by heat exchange at a low temperature, and dried air is re-introduced into the drying tank so that it can be heated and dried. A drying unit for a waste treatment system.

Today, due to the increase in domestic sewage and industrial wastewater, its residue sludge is increasing proportionally. Therefore, many kinds of waste treatment systems have been proposed for composting such sludge or converting it into vegetation soil. In particular, the sludge drying process is essentially required in such a waste treatment system, and a conventional drying method is dried by using cooling water of a cooling tower installed in a building.

That is, the cooling water of the cooling tower is pumped by a pump to pass through the water cooling pipe, and the hot air generated inside the drying tank is heat-exchanged with the water cooling pipe, and then dried through a series of processes that are introduced into the drying tank. To make it happen. However, the water-cooled pipe has a problem that the heat exchange efficiency is lowered because the temperature is not very low (slightly cooler than room temperature), and thus the drying capacity is weak because it does not sufficiently cool the hot air.

In addition, the conventional drying unit is limited to use only where the cooling tower is provided in relation to using the cooling water of the cooling tower. In addition, in order to supply the cooling water of the cooling tower to each water cooling pipe (when there are several water cooling pipes), a line facility for supplying the cooling water has to be established. to be.

Accordingly, the present invention has been made to solve the conventional problems as described above, the main object of the present invention in the application of a heat exchanger for drying the sludge by using the refrigerant gas as the heat exchange medium to reduce the cooling temperature of the heat exchanger It is to provide a drying unit for an organic waste treatment system that can further increase the dehumidification efficiency of the heat generated in the drying tank heat exchanged with this very low.

In addition, the present invention is to provide a drying unit for an organic waste treatment system is simple compared to the water-cooled heat exchanger using the cooling water of the cooling tower.

Main features of the present invention for achieving the above object,

An organic waste treatment system having a drying unit;

The drying unit includes a drying tank containing sludge, a stirring screw installed inside the drying tank to stir the sludge, and a drying tank installed under the drying tank to heat the drying tank as it passes through a high temperature heat medium. A heat jacket, a hot air outlet located above the drying tank, a refrigerant gas heat exchanger for heat-exchanging heat discharged from the hot air outlet at a low temperature, and blows heat from the hot air outlet to a refrigerant gas heat exchanger. At the same time, it consists of a blower for blowing the dehumidified air from the refrigerant gas heat exchanger into the drying tank.

In addition, another main feature of the present invention,

Incorporates a hopper unit equipped with a stirrer and discharger for stirring and forcibly discharging the sludge inside, an ultrasonic generator for destroying the floc from the sludge by ultrasonic waves, a dehydrator for dehydrating water contained in the sludge, and microorganisms In the organic waste treatment system consisting of a heavy metal removal unit for neutralizing the heavy metal contained in the sludge, and a drying unit for drying the sludge;

The drying unit includes a drying tank containing sludge, a stirring screw installed inside the drying tank to stir the sludge, and a drying tank installed under the drying tank to heat the drying tank as it passes through a high temperature heat medium. A heat jacket, a hot air outlet located above the drying tank, a refrigerant gas heat exchanger for heat-exchanging heat discharged from the hot air outlet at a low temperature, and blows heat from the hot air outlet to a refrigerant gas heat exchanger. At the same time, it consists of a blower for blowing the dehumidified air from the refrigerant gas heat exchanger into the drying tank.

Here, the hot air outlet further includes an air filter for filtering the foreign matter contained in the discharged heat.

In addition, a preferred configuration of the refrigerant gas heat exchanger is a heat discharge tube which is a passage through which heat is discharged from the drying tank, a porous heat exchange tube connected to the hot air discharge tube, and a heat exchanger tube spirally wound outside the heat exchange tube. Evaporative heat exchanger which serves to dehumidify the water contained in the hot air by cooling the heat passing through the inside of the air, a dry air supply pipe which is a passage for introducing the dehumidified air into the drying tank, the heat exchange pipe and the refrigerant pipe It surrounds the outside and serves to receive the condensate generated during dehumidification, and one side is composed of a condensate tray having a condensate outlet, and further includes a compressor, a condensation heat exchanger, and an expansion valve.

Here, it is preferable that a diaphragm is provided inside the heat exchange tube to hinder the flow of air.

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

1 is a configuration diagram showing an example of an organic waste treatment system, FIG. 2 is a front view of a drying unit according to the present invention, FIG. 3 is a state diagram in which a plurality of drying units according to the present invention are installed in succession, and FIG. 5 is a schematic diagram of a heat exchanger in a drying unit according to the present invention, FIG. 5 is a detailed configuration diagram of a drying unit according to the present invention, and FIG. 6 shows a relationship diagram of an evaporation heat exchanger and a heat exchanger tube in a drying unit according to the present invention.

First, in order to explain the drying unit according to the present invention, the basic configuration of the organic waste treatment system in which the drying unit is installed will be described with reference to FIG. 1.

The organic waste treatment system includes a hopper unit 10 into which sludge such as sewage and waste water is introduced by a vehicle or a conveyor; An ultrasonic wave generating unit (20) for destroying the flocks contained in the sludge conveyed from the hopper unit using ultrasonic waves; Dehydrator 30 for dewatering the water contained in the sludge; A heavy metal removal unit 40 for neutralizing heavy metals by injecting microorganisms into the dewatered sludge; The drying unit 100 for drying the sludge; in addition, the hopper unit 10 and the ultrasonic wave generating unit 20, heavy metal removal unit 40 and the drying unit 100, a plurality of drying units A transfer unit 50 connecting the drying unit to another drying unit adjacent thereto; It further includes a transfer conveyor 60 for connecting between the dehydrator 30 and the heavy metal removal unit 40.

From the organic waste treatment system of this configuration, or from the organic waste treatment system of another configuration, the drying unit 100 to be proposed in the present invention,

It is provided with a drying tank (110) containing sludge in the state of flocculation and dehydration and heavy metals are removed.

In addition, the inside of the drying tank is provided with a stirring screw 120 for stirring the sludge while being installed in the axial direction. This stirring screw plays a role in helping to achieve a quick drying effect by allowing the sludge to be heated evenly by stirring the sludge.

In addition, the lower portion of the drying tank 110 is provided with a heating jacket 130 having a flow path of a maze structure so that the heat medium supplied from the boiler, etc. can pass. This heating jacket serves to dry the sludge by heating the drying tank 110, substantially sludge while the heat medium is in communication.

Then, a hot air outlet 111 for discharging the heat generated in the process of heating the sludge is provided above the drying tank 110. Here, it is preferable that the air filter 140 is installed on the hot air outlet 111 to filter the foreign matter contained in the hot air discharged. At this time, the type of the air filter is not specified. This is because any type of filter can be used as long as it can filter foreign substances contained in the heat.

And, both sides of the drying tank 110 is provided with a moisture remover for removing the moisture contained in the heat discharged from the hot air outlet. Here, the dehumidifier is a refrigerant gas heat exchanger 150 is applied in order to utilize the natural phenomenon of dehumidification when the air meets the cool energy.

At this time, the structure of the refrigerant gas heat exchanger is preferably configured as follows. That is, the refrigerant gas heat exchanger 150 basically includes a compressor 151, a condensation heat exchanger 152, an expansion valve 153, and an evaporation heat exchanger 154 as in a general refrigeration cycle. From this configuration, the heat discharged from the drying tank 110 must have a structure as follows to enable dehumidification by heat exchange.

That is, the one side end of the heat exchange pipe 155 to be described later and the drying tank 110 has a hot air discharge pipe 156 that serves as a discharge passage of the heat discharged from the drying tank, and also the hot air discharge pipe And a porous heat exchanger tube 155 connected with each other. At this time, the heat exchange tube has a substantially 'U' shape, and the heat discharged from the hot air discharge tube passes therein. In addition, the evaporation heat exchanger 154 is wound in the form of a coil outside the heat exchange tube 155 through which the refrigerant gas of low temperature and low pressure passes. Therefore, dehumidification is performed in which the heat passing through the heat exchange tube 155 is cold and heat exchanged under the influence of the evaporative heat exchanger 154, and the water contained in the heat flux is removed in the process.

In addition, it is preferable that a diaphragm 157 is installed inside the heat exchange tube 155 to prevent a smooth flow of heat. This diaphragm increases heat exchange efficiency by increasing the contact time between the heat and the evaporative heat exchanger 154 by interfering with the rapid passage of the heat passing through the inside of the heat exchange tube 155 or the passage of the heat in the normal path. It will play a role. Unlike the accompanying drawings, such a barrier may be installed in several pieces.

The condensate receiver 158 is surrounded by the evaporation heat exchanger 154. In more detail, the condensate receiver surrounds the outside of the porous portion 155a of the heat exchanger tube 155 to prevent the heat passing through the porous portion 155a from being dispersed to the outside and the evaporative heat exchanger 154 in a cold state. And hot air at the same time serves to receive the condensate generated by the heat exchange. At this time, the condensate outlet 158a for discharging the condensate to the outside is provided below the condensate receiver 158.

And, the other end of the heat exchange tube 155 and the drying tank 110 is connected to the drying air through the heat exchange tube and serves to guide the introduction of the dry air dehumidification is completed into the drying tank through the heat exchange tube. The supply pipe 112 is provided.

In addition, a blower 160 is installed at the outlet side of the dry air supply pipe 112 to play a role of forced air to allow the heat inside the drying tank 110 to flow back into the drying tank through the heat exchange pipe 155. Done.

After the configuration of the present invention has been described above, the working relationship of the present invention will be described.

As the heat medium supplied from the boiler passes through the heating jacket 130, the drying tank 110 begins to be heated. When the drying tank is heated, the sludge contained therein is heated together and the sludge starts to heat dry. In this process, the heat generated from the sludge is discharged through the heat discharge pipe 156 by the suction force of the blower 160, the discharged heat is passed through the heat exchange pipe (155).

The heat passing through the heat exchange tube 155 flows in an irregular direction without flowing in a straight path by the diaphragm 157. At this time, since the cold evaporative heat exchanger 154 is wound in a coil form on the surface of the heat exchanger tube, the heat flowing through the heat exchanger tube is exchanged by the evaporative heat exchanger. Here, the heat is dehumidified in the process of contact with the cold evaporation heat exchanger, the condensate generated during the dehumidification is collected in the condensate receiver 158, the collected condensate is discharged through the condensate outlet 158a is a separate condensate storage tank It is stored in (not shown) and used for other purposes.

On the other hand, the hot air flowing in an irregular direction by the diaphragm 157 can have a greater dehumidification effect because the contact time with the evaporative heat exchanger 154 is relatively longer than when it is regularly flowed. The porous portion 155a may also be interpreted in a similar sense. That is, the heat is distributed not only inside the heat exchange tube 155 but also through the porous portion 155a, so that the time for staying inside the condensate receiver 158 increases, this also corresponds to an advantageous structure for improving the dehumidifying effect. do.

The dehumidification is completed, the heat is re-supplied to the interior of the drying tank 110 through the dry air supply pipe 112 by the suction force of the blower 160 while the temperature is changed to a low temperature at the same time dehumidification. The sludge is dried by repeating this preliminary process.

At this time, the refrigerant gas heat exchanger 150 is very low temperature dehumidification efficiency is very high compared to the water cooling method by using the refrigerant gas as the heat medium. Therefore, even if the same time is operated, the dehumidification effect is large, and as a whole organic waste treatment system, the sludge treatment capacity is increased.

As described above, the present invention can increase the dehumidification efficiency of the heat exchanged by the heat exchange medium of the heat exchanger for drying the sludge as the refrigerant gas is very low cooling temperature of the heat exchanger under the same conditions The sludge treatment capacity of the system can be increased.

In addition, compared with the water-cooled heat exchanger using the cooling water of the cooling tower, the piping installation is simple and the installation work is simple and the equipment cost is low.

Claims (5)

An organic waste treatment system having a drying unit; The drying unit, A drying tank containing sludge, a stirring screw installed inside the drying tank to stir the sludge, a heating jacket installed under the drying tank and heating the drying tank as it passes through a high temperature heat medium; A hot air outlet located above the drying tank and a refrigerant gas heat exchanger for heat-exchanging heat discharged from the hot air outlet at a low temperature, and a refrigerant gas heat exchanger by blowing heat from the hot air outlet to a refrigerant gas heat exchanger. Drying unit for an organic waste treatment system comprising a blower for blowing the dehumidification of the drying air from the air to the interior of the drying tank. Incorporates a hopper unit equipped with a stirrer and discharger for stirring and forcibly discharging the sludge inside, an ultrasonic generator for destroying the flocs from the sludge by ultrasonic waves, a dehydrator for dehydrating water contained in the sludge, and microorganisms In the organic waste treatment system consisting of a heavy metal removal unit for neutralizing the heavy metal contained in the sludge, and a drying unit for drying the sludge; The drying unit, A drying tank containing sludge, a stirring screw installed inside the drying tank to stir the sludge, a heating jacket installed under the drying tank and heating the drying tank as it passes through a high temperature heat medium; A hot air outlet located above the drying tank and a refrigerant gas heat exchanger for heat-exchanging heat discharged from the hot air outlet at a low temperature, and a refrigerant gas heat exchanger by blowing heat from the hot air outlet to a refrigerant gas heat exchanger. Drying unit for an organic waste treatment system, characterized in that the blower for blowing air dehumidified from the air into the drying tank. The method according to claim 1 or 2, Drying unit for an organic waste treatment system, characterized in that the hot air outlet further comprises an air filter for filtering foreign substances contained in the discharged heat. The method according to claim 1 or 2, The refrigerant gas heat exchanger, The hot air discharge tube, which is a passage through which the heat is discharged from the drying tank, the porous heat exchange tube connected to the hot air discharge tube, and while cooling the heat through the inside of the heat exchange tube while spirally winding the outside of the heat exchange tube, An evaporative heat exchanger that serves to dehumidify the moisture contained therein, a dry air supply pipe that is a passage through which the dehumidified air flows into the drying tank, and collects condensed water generated during dehumidification while surrounding the outside of the heat exchange pipe and the refrigerant pipe. It serves as a condensate receiver having a condensate outlet on one side, the drying unit for an organic waste treatment system, characterized in that further comprises a compressor, a condensation heat exchanger, an expansion valve. The method of claim 4, wherein Drying unit for an organic waste treatment system, characterized in that the diaphragm is provided in the heat exchange tube to hinder the flow of air.

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