KR20190004169A - Recycling system of sewage sluge using thermaldecomposition - Google Patents

Abstract

The present invention relates to a treatment apparatus and a treatment method of sewage sludge by pyrolysis. The apparatus comprises: an auxiliary burner; a high-temperature heat storage furnace for burning regenerated activated carbon; a kiln (rotary) type drying chamber for drying sludge primarily and secondarily by heat supplied from the heat storage furnace; a storage vessel for storing the dried sludge; a fixed type cylindrical pyrolysis chamber for pyrolyzing the sludge transferred from the storage vessel by heat supplied from the heat storage furnace to form carbides; and a microorganism deodorization tower for removing odors generated during storing and drying processes.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage sludge treatment apparatus,

The present invention relates to an apparatus and method for treating sewage sludge by pyrolysis, and more particularly,

And a kiln (rotary) type dryer, and a microorganism deodorization tower is provided at the rear end, and the sewage sludge having a water content of 80% is screwed

The dried sludge is stored in a storage container by being dried in a dryer provided by using air vent. At this time,

The contaminants are removed by the microbial deodorization tower, and four pyrolysis units are installed in parallel with each other in a stationary cylindrical simple structure column

The decomposition chamber and the high-temperature heat storage furnace are connected to each other, and a cylindrical pyrolysis vessel is provided, and the dry sludge stored in the storage vessel is transferred

After being immersed in a pyrolysis vessel, it is placed in a pyrolysis chamber using a hoist to thermally decompose it, and the odor and decomposition gas

Gas: methane gas) to the combustion chamber of the high-temperature heat accumulation furnace to effectively treat air pollutants.

And more particularly, to an apparatus and method for treating a sewage sludge.

Recently, the environmental pollution caused by various wastes generated in the process of industrialization has become more severe day by day,

A variety of waste treatment technologies and pollution prevention technologies and policies have been proposed to meet these requirements.

So far, in Korea, sewage sludge has been treated by ocean dumping, landfill and incineration, but since July 2003,

And the London Convention prohibited the use of marine dumping, but currently there is no clear treatment other than incineration

However, due to the disposal costs due to incineration, it is still in the sea. However, in case of marine dumping,

In addition, in case of incineration, most incinerators are incinerated along with the garbage. In this case,

After the combustion reaction, post-treatment equipment is indispensable because of the air pollutants caused by exhaust gas (HCl, HCN, NOx, dioxin, etc.)

The burden of the equipment cost for the post-treatment facility is large, and the burden of the management cost by the supplementary fuel cost is great. Also, due to incomplete combustion,

30% of the residue is generated and these residues are buried in the landfill. However, in the case of landfill,

Secondary environmental pollution resulting from soil contamination and groundwater contamination is becoming a problem.

In addition, in the case of conventional incinerators, the capacity to be treated must be large to some extent,

Since the cost is high, the treatment facilities that can be incinerated in comparison with the amount of waste generated in each industry are very large

If the sewage sludge is incinerated again, the incineration facilities in our country should be increased tremendously.

In this case, the problem of air pollution caused by incineration and the large burden of investment facility management and maintenance cost are very serious and many

For example, Korean Unexamined Patent Application Publication No. 2002-0041374 discloses a method in which before the sewage sludge is introduced into the incinerator main body,

After the sludge is firstly dried by using the waste heat of the gigas, the sewage sludge introduced into the incinerator has a contact area with heat

There is disclosed a sewage sludge incineration system in which a large amount of time is spent for communication and heat contact,

In Publication No. 10-2002-0017572, a first heat treatment is performed using a rotary kiln, and then treated sludge, clay and loess are mixed

The sludge is produced by molding, drying and firing, or by mixing and curing sludge and cement. The sludge is heated in a rotary kiln

A method of manufacturing a building material without mold deformation has been described,

Open Publication No. 10-2001-0113277 discloses a drying machine comprising a dryer, a feed hopper provided in a drying furnace at one upper end, an electric heater,

A conveying plate formed integrally with a vertically elongated plate formed on an upper portion of the conveying plate,

And a dryer for treating wastewater dewatering cake and sludge,

In this publication, a rotary kiln-based waste and low-grade solid fuel combustion device is described,

In this publication 2004-0017518, organic wastewater is treated in a closed single treatment tank, and in the secondary treatment tank,

And the odorous component is decomposed and treated by the action of the microorganisms in the second treatment tank,

A method of treating brittle gas is described,

Korean Patent Publication No. 1996-0009388 discloses a method for producing a sludge, which comprises a hopper, a reactor, a combustion section, and a feeder,

A sludge drying solid fraction treatment device for pyrolysis treatment is disclosed,

Korean Utility Model Registration No. 20-0321352 has a sorting device, a crushing device for crushing the selected waste,

The waste material after the process is rotated by a U-turn type drying device, and the drying device performs U-turn of hot air to supply it to the vicinity of the heating device,

A rotary type U-turn type drying and carbonizing apparatus using waste is described,

This Publication No. 20-0218031 discloses an incinerator, a dewatering device, a drying device and a crushing device, a combustion chamber,

There is disclosed a movable grate multi-purpose incineration treatment apparatus composed of a device for reducing water vapor to condensed water,

The above-mentioned conventional technologies have the problems of air pollution due to environmental problems and the enlargement of the incineration facilities and incineration,

There has been a problem in that it can not be used in practice because it can not solve the existing problems due to a large burden of rain.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to provide a sewage sludge which can dry and pyrolyze

A simple structure kiln (rotary) dryer with a shuttle kiln type high-temperature heat storage furnace connected, and a fixed cylindrical

And the sewage sludge is dried by a kiln dryer using the heat of combustion generated in the high-temperature heat storage furnace, and dried

Sludge is pyrolyzed in a pyrolysis chamber to produce recycled activated carbon and a water treatment agent and can be recycled. In addition,

Sewage sludge by pyrolysis method which enables to recycle generated residues (ash) into eco-friendly soil improvement agent and eco-friendly building material

And a method for processing the same.

Another object of the present invention is to provide a method for recovering decomposition gas (biomass: methane gas) generated when pyrolysis of sewage sludge in a pyrolysis chamber is repeated

The recycled activated carbon produced by pyrolyzing the sewage sludge is circulated to the hot storage chamber at a high temperature

The apparatus for treating sewage sludge by pyrolysis method which makes it possible to minimize the burden of fuel cost by using it as fuel for storage heat and

And a method for processing the same.

As described above, according to the present invention, the sewage sludge is treated by pyrolysis to produce recycled activated carbon, a water treatment agent, an environmentally friendly soil improving agent,

Recycling sewage sludge to produce marine construction materials, resulting from the conventional methods of dumping, landfilling and incineration of marine sludge

To prevent secondary pollution from air pollution and incineration residues from marine pollution, soil pollution and incineration

At the same time, it is possible to reduce the initial facility investment cost by miniaturizing the treatment facility rather than the incineration facility.

In addition, by using odor and decomposition gas (biomass: methane gas) generated in the pyrolysis chamber as an auxiliary fuel, the amount of fuel used is reduced

Energy saving effect can be expected.

In order to accomplish the above object of the present invention, there is provided a system for recycling sewage sludge by a pyrolysis method,

A heat storage furnace (10) for burning Christmas fuels; (Rotary) type drying chambers (2,3) for drying the first and second order by the heat supplied from the heat storage furnace,

and; The sewage sludge dried in the drying chambers 2 and 3 is conveyed by a screw conveyor to be conveyed to the drying chamber 2,

A hoist for transferring the dried sludge stored in the storage vessel 5 into a pyrolysis vessel and transferring the dried sludge to the pyrolysis chamber and a storage tank 5 installed at the rear surface of the storage vessel 5, The stored dry sludge is fed to a vacuum pump

A pyrolysis chamber 4 of a stationary cylindrical type for pyrolyzing the pyrolysis gas under a reduced pressure condition to produce a carbide (char)

And a microbial deodorization tower (20) for deodorizing the wastewater. The present invention relates to an apparatus and method for treating sewage sludge by pyrolysis.

In the pyrolysis chamber (4) of the present invention, four groups are connected in parallel to each other and connected to the discharge port of the heat storage furnace (10) at a high temperature (1,100 ° C)

The system is operated in a semi-continuous manner.

Then, the sewage sludge dried by the heat generated in the heat storage furnace (10) is pyrolyzed in the pyrolysis chamber to be carbonized

And a circulation unit is provided so as to recycle the discharged odor and biomass (methane gas, etc.) as an auxiliary fuel for storage heat.

do.

In the present invention, a large amount of microorganisms are contained in the sewage sludge so that the sewage sludge continues to operate,

There is a lot of odor in the wool, and due to the action of a large amount of microorganisms in sewage sludge, biomass (methane gas, etc.)

do. Therefore, in the present invention, the methane gas generated due to the action of microorganisms is used as biomass

do.

And a microorganism deodorization tower 20 for removing odors generated during storage and drying by microorganisms

do.

The heat storage furnace 10 supplies regulated activated carbon produced by pyrolyzing the sewage sludge as fuel to the pyrolysis chambers 2,

Two combustion chambers 110 and 120 of the shuttle kiln type are installed and alternately operated, and one honeycomb

A heat storage chamber 130 is provided.

In addition, the present invention relates to a method of treating sewage sludge by pyrolysis to produce recycled activated carbon, a water treatment agent, an environmentally friendly soil conditioner,

By recycling to produce ash, this sewage sludge is subjected to ocean dumping, landfill and incineration,

It is possible to prevent pollution caused by air pollution and incineration residue from salt, soil pollution and incineration process,

It is possible to reduce the initial facility investment cost by miniaturizing the treatment facility rather than the facility.

Further, by using the odor and decomposition gas (biomass: methane gas) generated in the pyrolysis chamber 4 as an auxiliary fuel,

Energy savings can be expected.

The high-temperature heat storage furnace (10) is a shuttle-kiln type in which a charging port is provided at one side and a discharge port is provided at the opposite side

And using a carbide produced by pyrolyzing the sewage sludge through the inlet,

A bogie equipped with a bogie driving device is provided so that the regenerated activated carbon made into a size can be loaded and unloaded,

A plurality of auxiliary burners for igniting the regenerated activated carbon, which is fuel, and a blowing port for sucking the combustion air,

Auxiliary burners are installed so that LNG can be used as fuel to minimize the emission of pollutants from auxiliary fuels.

The interior is filled with refractory bricks. When two combustion chambers are installed and alternately operated, the combustion heat generated flows into the heat storage furnace

Therefore, it is designed so that constant heat is always introduced into the pyrolysis chamber. Also, at this time, the regenerated activated carbon can be used as fuel for the storage heat

Design.

The dryer (2, 3) uses the high temperature (1,100 ° C.) heat discharged from the combustion gas outlet (102) of the heat storage furnace (10)

And connected to the combustion gas discharge port (102) of the high temperature heat storage furnace so as to be dried,

In this case, two desiccators (2, 3) are installed to be designed to dry first and secondarily. In order to insulate the desiccators (2, 3)

A castable 410 of about 100 mm is attached.

The pyrolysis chamber 4 pyrolyzes the sewage sludge using heat at a high temperature (1,100 ° C) discharged from the discharge port of the heat storage furnace 10,

The pyrolysis chamber 4 is connected to the combustion gas discharge port 102 of the heat storage furnace 10 so as to form the pyrolysis chamber 4,

In order to maintain the temperature of the pyrolyzer 4, a castable 10 is installed at the inner part of the pyrolyzer 4

The circulation part circulates the decomposition gas (biomass: methane gas) generated in the pyrolysis chamber 4 to the high temperature (1,100 ° C.) heat storage furnace 10,

Respectively. The circulation unit connects the pyrolysis chamber (4) and the high-temperature heat storage furnace (10) to generate a decomposition gas (Biome

Gas: methane gas) may flow, it may be formed in any material and shape. Also, for smooth flow,

It would also be desirable to have it.

Generally, pyrolysis refers to decomposing a raw material by heating it in the absence of oxygen or oxygen.

As a method capable of recovering a usable component,

In the present invention, the temperature inside the pyrolysis chamber during pyrolysis is controlled to be 850 ° C or less. This is because the low temperature (850 ° C or less) pyrolysis method

So as to increase the thermal decomposition efficiency of the dried sewage sludge including the harmful chemical substances by heat.

The treatment of odor and decomposition gas generated in the drying chamber (2, 3) and the storage vessel in the microorganism deodorization tower (20)

The circulation pump 21 connected to the water storage tank 22 is operated to inject the odor and decomposition gas into the spray nozzle 23

Water is sprayed by the microorganism, the one end is dissolved in the water, and the inner wall is partitioned by a plurality of mesh-type microorganism carriers

. The water sprayed on the microorganism deodorization tower continues to pass through the microorganism carrier in the mesoporous form,

And since such a technology configuration is not a core technology of the present invention but a generally known technology,

The description of the volume is omitted.

The microorganism used in the present invention is a microorganism commonly used in the art, and in the present invention,

It is not necessary to specify the name of microorganisms.

Next, regarding the operation of the recycling system of the sewage sludge by the pyrolysis method according to the embodiment of the present invention constituted as described above

I explain it.

Example

First, the sewage sludge having a water content of 80% is introduced into the dryer 2 installed on the rear side of the screw feeder 1 by using the screw feeder 1

In order to increase the thermal decomposition efficiency, the heat of heat accumulated in the heat storage furnace 10, which is discharged from the outlet of the high temperature heat storage chamber 130,

After drying over the car, the secondary dryer (2, 3)

After the dried sludge is stored in the storage vessel 5 using a conveyor,

At this time, the odor generated in the storage and drying process is transferred to the microorganism deodorizing tower 20 connected to the dryer (2,3) and the storage container by the pipe

Treated by microbial contact,

A cylindrical pyrolysis vessel is provided to prevent the dust from being discharged. The screw sludge conveyor is used to pyrolyze the dried sludge stored in the storage vessel (5)

After being placed in a container, the pyrolysis vessel is introduced into the pyrolysis chamber (4) using a hoist,

The heat of the heat accumulating in the regenerator 10 discharged from the outlet of the regenerator 10 at 1,100 ° C is supplied to the pyrolysis chamber 4 while the dried sewage sludge is supplied

When pyrolysis is carried out, pyrolysis is carried out so that the internal temperature is lower than 850 ° C to produce carbide, which is recovered and recycled.

The odor and decomposition gas (biomass: methane gas) generated while the carbide (char) remains in the pyrolysis of the sewage sludge is transferred to the pyrolysis chamber 4

And then circulated through the discharge port to the high-temperature regenerator (10) to treat the sewage sludge.

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

Fig. 1 is an overall view of a recycling system for sewage sludge by the pyrolysis method of the present invention. Fig. 2 is a detailed view of a shuttle kiln type heat storage furnace of the present invention, Fig.

Fig. 4 is a detailed view of the shuttle kiln type heat storage furnace, Fig. 5 is a detailed view of the dryer of the present invention, Fig. 6

Fig. 7 is a detailed view of the pyrolysis chamber side of the present invention, and Fig. 8 is a detailed view of the microbial deodorization tower of the present invention

(2), a thermal decomposition chamber (4), a storage container (5), a heat storage furnace (10), a vacuum pump (11), a biomass (12)

The deodorization outlet 24, the liquefied gas inlet 25, the microbial carrier 26, the combustion gas inlet 101, the circulation pump 21, the storage tank 22, the injection nozzle 23, A combustion gas outlet 102, primary and secondary combustion chambers 110 and 120, an auxiliary burner 111, a tuyer 112, a guide 113,

The main shaft 130, the bogie 140, the balancing device 150, the inlet 160, the dryer driving gear 201, the auxiliary roller 210, the thermal decomposition chamber inlet 401,

Outlet 402, and canister 410 shown in FIG.

As shown in FIG. 1 to FIG. 7, the apparatus for treating sewage sludge by the pyrolysis method of the present invention comprises:

A screw injector (1) for injecting sewage sludge into a drying chamber; (1) is provided on the rear side of the screw injector (1)

Two drying chambers (2,3) connected to a heat storage furnace (10) which is supplied with heat to dry and pyrolyze the introduced sewage sludge,

(2) and (3), and the waste sludge dried in the drying chamber (2, 3)

(5), a hoist for transferring the dried sludge stored in the storage container (5) into a pyrolysis vessel and transferring it to the pyrolysis chamber,

Four pyrolysis chambers 4 provided on the rear surface of the pyrolysis chamber 5 for thermally decomposing the stored sludge from the storage container 5,

A circulation section for circulating the decomposition gas (biomass: methane gas) generated in the drying chamber 4 to the high temperature heat storage furnace 10,

And a microbial deodorization tower 20 connected to the lower portion of the sewage sludge treatment plant by a pipe.

As shown in FIGS. 1 to 4, the heat storage furnace 10 comprises a regenerated activated carbon (hereinafter referred to as " regenerated activated carbon ") produced by pyrolyzing the sewage sludge,

In order to supply a certain amount of heat to the pyrolysis chambers 2 and 3 using fuel as a fuel, two shuttle-kiln type combustion chambers

(110, 120) are alternately operated, and one heat storage chamber (130) for heat storage is formed,

The two combustion chambers 110 and 120 are provided with a charging port 131 at one side and a charging port 132 formed at the opposite side for discharging ash,

It is possible to insert and remove activated carbon produced using carbide formed by thermally decomposing sewage sludge through the inlet 131

A bogie 140 on which the bogie driving device 150 is mounted,

On the other side, a plurality of auxiliary burners 11 for igniting regenerated activated carbon, which is fuel, and a blowing port 112 for sucking combustion air,

And a refractory brick formed therein,

The regenerative chamber 130 is composed of a combustion gas inlet 101 formed at a lower side and a combustion gas outlet 102 formed at an upper side,

As shown in FIG. 5, in the dryer (2) and (3), sludge is connected to one side of the twin screw mixer (1)

Is connected to the pyrolysis chamber 4 and the lower part is connected to the heat storage furnace 10 and two cylindrical drying units 2 and 3 are installed

(1,100 占 폚) which is discharged from the combustion gas outlet 102 of the heat storage furnace 10,

And is connected to the combustion gas outlet (102) of the high temperature heat storage furnace (10) so that the sewage sludge can be dried,

A dryer driving gear 201 formed at an outer portion of the dryer driving gear 201, an auxiliary roller 210 formed at regular intervals above and below the dryer driving gear 201,

A castor 410 having a thickness of about 100 mm for keeping the inside of the dryer 2,3 and the storage container 5,

And a microorganism deodorization tower 20 connected to the pipes to remove the odors generated in the dryers 2, 3 and the storage vessel 5,

1, 6 and 7, the pyrolysis chamber 4 is connected to the drying chamber 2,

And four units are installed, two units are connected in parallel, and two units are alternately operated. In the lower portion, a pyrolysis chamber (4)

(10) for supplying high-temperature heat to the pyrolysis chamber (4), and a processing chamber

And a circulation unit that is capable of introducing malodorous and decomposed gas into the high-temperature heat storage chamber (130) by a vacuum pump (11)

A castable 10 formed in an inner part for maintaining the temperature of the pyrolyzer 4 and a heat accumulator 10 connected to the lower part of the pyrolyzer 4,

The key includes a pyrolysis chamber inlet 401,

And a pyrolysis chamber outlet (402) for discharging the processed [decomposition gas (biomass): methane gas] installed on the upper side of the pyrolysis chamber,

(1,100 DEG C) to the heat storage furnace (10).

The circulation unit connects the pyrolysis chamber 4 and the high-temperature heat storage furnace 10 to generate a decomposition gas (biomes: methane gas) generated in the pyrolysis chamber 10

It may be formed in any material and shape as long as it can flow. Also provided is a blower for smooth flow

.

As shown in FIG. 7, the microorganism deodorization tower 20 is connected to the drying chambers 2, 3 and the storage container 5,

(25), a deodorizing outlet (24) formed on the other side, and a storage tank

A circulation pump 21 connected to the water storage tank 22 to supply water into the microorganism deodorization tower 20 and a circulation pump 21 connected to the circulation pump 21, A spray nozzle 23 connected to the microbial deodorization tower 20 for spraying water,

And a microbial carrier (26) in the form of a net-like partition wall installed at a predetermined distance from the main body of the sewage sludge disposal apparatus

All.

Claims (1)

In a sewage sludge treatment apparatus by pyrolysis,
A screw injector (1) for injecting sewage sludge into a drying chamber; (1) is provided on the rear side of the screw injector (1)
Two drying chambers (2,3) connected to a heat storage furnace (10) which is supplied with heat to dry and pyrolyze the introduced sewage sludge,
The sewage sludge dried in the drying chambers 2 and 3 is transported and stored by a screw feeder,
A storage vessel (5), a hoist for storing the dried sludge stored in the storage vessel (5) in a pyrolysis vessel and transferring it to the pyrolysis chamber,
Four pyrolysis chambers 4 installed on the rear surface of the storage container 5 for thermally decomposing the dried sludge stored in the storage container 5,
A circulation unit for circulating the decomposition gas (biomass: methane gas) generated in the decomposition chamber 4 to the high temperature heat storage furnace 10,
And a microorganism deodorization tower 20 connected to the rear end of the microorganism deodorization tower 2, 3 by a pipe,
The high-temperature heat storage furnace (10) comprises a pyrolysis furnace (10), which uses regenerated activated carbon produced by pyrolyzing the sewage sludge as fuel,
Two shuttle-kiln type combustion chambers 110 and 120 are installed and operated alternately
And a single honeycomb heat storage chamber 130 for heat storage,
The two combustion chambers 110 and 120 are provided with a charging port 131 at one side and a charging port 132 formed at the opposite side for discharging ash,
It is possible to insert and remove activated carbon produced using carbide formed by thermally decomposing sewage sludge through the inlet 131
A plurality of auxiliary burners 140 for igniting the regenerated activated carbon which is fuel,
(112) for sucking combustion air and refractory bricks formed therein, and the regenerative chamber (130) is constituted by a lower portion
A combustion gas inlet 101 formed at one side, and a combustion gas outlet 102 formed at the upper side,
The dryer (2, 3) is connected to one side of the screw injector (1) to allow sludge to flow in and the other side is connected to the pyrolysis chamber
And the lower part is connected to the heat storage furnace (10). Two dryer units (2, 3) of a kiln (rotary) type are installed and dried
And drying the sewage sludge using heat at a high temperature (1,100 ° C.) discharged from the combustion gas outlet 102 of the heat storage furnace 10
(10) is connected to the combustion gas outlet (102) of the high-temperature heat storage furnace (10) so that the dryer driving gear
An auxiliary roller 210 formed at regular intervals above and below the dryer driving gear 201,
(2, 3) and a storage container (5) and connected to one side of the dryer (2, 3) and the storage container (5)
And a microbial deodorization tower (20) connected to the pipe to remove the generated odor,
The pyrolysis chamber (4) is connected to the processing chamber (2, 3) for introducing and treating the processed gas. Four pyrolysis chambers
A heat storage furnace (10) designed to operate alternately by two units, a heat storage furnace (10) formed at the lower part and supplying high temperature heat to the pyrolysis chamber (4)
, And a vacuum pump (11) for transferring the treated gas, which keeps the pyrolysis chamber (4) in a reduced pressure state, to the regenerating chamber,
(10) formed at an inner portion thereof for maintaining the temperature of the pyrolyzer (4), and a castor (10) connected to the heat storage furnace (10) at a lower portion of the pyrolyzer (4) When high temperature heat is input
The key includes a pyrolysis chamber inlet 401 and a pyrolysis chamber outlet 401 provided at one side of the pyrolysis chamber 401 for discharging treated (decomposition gas (biomass): methane gas)
(1,100 占 폚) heat storage furnace 10,
The microorganism deodorization tower 20 is connected to the drying chambers 2 and 3 and the storage container. The microorganism deodorization tower 20 includes an active gas inlet 25 formed on one side,
A storage tank 22 in which water formed at the sum of the deodorant outlet 24 formed in the vicinity of the liquid inlet 25 and the water stored in the water storage tank 22,
A circulation pump 21 connected to the circulation pump 21 for supplying water to the interior of the microorganism deodorization tower 20,
A spray nozzle 23 connected to the pipe for spraying water, a mesh-type nozzle 23 disposed at a predetermined interval in the microbial deodorization tower 20,
And a microbial carrier (26) in the form of a partition wall. The pyrolytic sewage sludge treatment apparatus

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