KR101802598B1 - Apparatus for melting waste sludge and recovering waste heat - Google Patents

Apparatus for melting waste sludge and recovering waste heat Download PDF

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Publication number
KR101802598B1
KR101802598B1 KR1020150135503A KR20150135503A KR101802598B1 KR 101802598 B1 KR101802598 B1 KR 101802598B1 KR 1020150135503 A KR1020150135503 A KR 1020150135503A KR 20150135503 A KR20150135503 A KR 20150135503A KR 101802598 B1 KR101802598 B1 KR 101802598B1
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sludge
conduit
wastewater sludge
melting
waste
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KR1020150135503A
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Korean (ko)
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KR20170036396A (en
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엄태인
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한밭대학교 산학협력단
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/12—Sludge, slurries or mixtures of liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A waste water sludge melting and waste heat recovery apparatus according to the present invention is a waste water sludge melting and waste heat recovery apparatus for melting waste water sludge containing a heavy metal and recovering waste heat discharged from the waste sludge, A first conduit formed at a lower end thereof with a slag discharge portion for discharging slag generated from the wastewater sludge and inclined downward; A molten metal disposed inside the first conduit for melting the incoming wastewater sludge; A second conduit branching upward from the lower side of the molten metal in the first conduit and having an exhaust gas discharge portion formed at an upper end thereof for discharging exhaust gas generated in the wastewater sludge; And a heat exchanger disposed inside the second conduit for recovering the heat of the exhaust gas. According to the waste water sludge melting and waste heat recovery apparatus of the present invention, the wastewater sludge introduced into the inlet flows through the interior of the waste water sludge by the inclination of the first pipe, and sequentially undergoes drying, pyrolysis and melting processes, The operation can be simplified and the scale of the facility can be reduced, and the exhaust gas generated from the molten metal can be effectively transferred to the heat exchanger without leaking, thereby improving the recovery efficiency of the waste heat.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering waste heat from a waste sludge,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste water sludge melting and waste heat recovery apparatus, and more particularly, to a waste water sludge recovery apparatus for recovering wastewater sludge containing heavy metals by melting the waste water sludge to generate slag in a molten state, To a waste heat sludge melting and waste heat recovering apparatus.

In recent years, as the industry has become more sophisticated and larger, various industrial wastewater sludge has been discharged. Such wastewater sludge contains various heavy metals such as arsenic, mercury, chromium, copper, cadmium, lead and nickel harmful to human body .

At this time, the heavy metals contained in the wastewater sludge are problematic due to serious corrosion and erosion in the walls of the combustion apparatus, heat exchangers, and insulators during the combustion process of the wastewater sludge mixed with the solid fuel.

In addition, such wastewater sludge can be used in a wide range of applications, including 0.5-1.0 (mg / kg) mercury, 5.0 (mg / kg) cadmium, which is the allowable concentration of heavy metals in solid refuse fuel and biomass- , Heavy metal exceeding the standard value of 100 to 150 (mg / kg) of lead, 5 to 13 (mg / kg) of arsenic and 70 (mg / kg) of chromium.

Therefore, in the conventional wastewater sludge disposal apparatus, in the process of burning the wastewater sludge after mixing with the solid fuel in the combustion apparatus after drying, a pretreatment process for removing heavy metals from a separate post-treatment apparatus for treating heavy metals or dried sludge is performed However, this process is not only complicated but also expensive.

Therefore, various treatment methods of wastewater sludge containing heavy metals and a more environmentally friendly and economical treatment method are required.

As an alternative thereto, there has been proposed a method of drying wastewater sludge and melting it in a high temperature state, followed by vitrification, and Korean Patent Registration No. 10-1228227 is disclosed as a related technology. Here, a sludge storage tank for storing sludge introduced from the outside; A sludge drying device for primarily drying the sludge supplied from the storage tank; A sludge supply device for transferring the primarily dried sludge to the molten bath; A heat exchange device for recovering heat from the molten bath and supplying heat to the sludge drying device; And a slag glass device connected to the lower end of the molten bath to vitrify the molten slag.

However, in the sewage and wastewater sludge recycling apparatus, the sludge supply device is operated to flow the wastewater sludge in one direction so as to pass through the storage tank and the melting tank, thus complicating the facility and increasing the size.

In addition, among some combustion gases (exhaust gas) generated in the melting vessel, combustion gas remaining in the melting vessel may not be able to enter the drying device or the heat exchange device, and waste heat recovery and utilization efficiency may be somewhat lowered.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a waste water sludge melting and waste heat recovery apparatus capable of effectively performing drying, pyrolysis and melting treatment of wastewater sludge, The purpose of the device is to provide.

A waste water sludge melting and waste heat recovery apparatus according to the present invention is a waste water sludge melting and waste heat recovery apparatus for melting waste water sludge containing a heavy metal and recovering waste heat discharged from the waste sludge, A first conduit formed at a lower end thereof with a slag discharge portion for discharging slag generated from the wastewater sludge and inclined downward; A molten metal disposed inside the first conduit for melting the incoming wastewater sludge; A second conduit branching upward from the lower side of the molten metal in the first conduit and having an exhaust gas discharge portion formed at an upper end thereof for discharging exhaust gas generated in the wastewater sludge; And a heat exchanger disposed inside the second conduit for recovering the heat of the exhaust gas.

The wastewater sludge melting and waste heat recovery apparatus may further include an auxiliary fuel burner disposed above the molten metal.

The waste water sludge melting and waste heat recovery apparatus may further include a slag collecting unit disposed below the first pipe to recover slag discharged from the slag discharge unit.

The waste water sludge melting and waste heat recovery apparatus may further include a third conduit for guiding the slag discharged from the slag discharging portion to the slag collecting portion in communication with a lower portion of the first conduit.

The heavy metals in the wastewater sludge may include at least one selected from the group consisting of arsenic, mercury, chromium, copper, cadmium, lead, and nickel.

The concentration of the heavy metal in the wastewater sludge is preferably 1 to 100,000 mg / Kg.

In addition, it is preferable that 1.0-20.0 wt% of a mixture of water glass and calcium oxide (CaO) is added to the wastewater sludge introduced into the inlet.

The first pipe, the second pipe and the third pipe preferably have an internal temperature of 1,240 to 1,400 ° C.

Also, 1.0 to 15.0% by weight of a mixture of water glass and calcium oxide (CaO) may be added to the wastewater sludge introduced into the inlet.

The waste water sludge melting and waste heat recovery apparatus according to the present invention has the following effects.

First, the wastewater sludge that is introduced into the inlet portion is sequentially subjected to drying, pyrolysis, and melting processes while flowing through the inside of the first pipe due to the inclination of the first pipe, so that the operation is simple and the scale of facilities can be reduced.

Second, by disposing the molten metal and the heat exchanger in the first conduit and the second conduit, the exhaust gas generated in the molten metal can be effectively transferred to the heat exchanger without leaking, and the waste heat recovery efficiency can be increased.

Third, by disposing the molten metal in the first tubular conduit, the heat of the exhaust gas is distributed in the first conduit, and the waste sludge can be thermally dried with its own heat.
Fourth, the auxiliary fuel burners are arranged in a single position opposite to the molten metal and can be operated continuously, so that the operation is simple and the scale of the facility can be reduced.
Fifth, the internal temperature of the first to third conduits is maintained at 1,240 to 1400 DEG C, so that the heavy metal is not eluted and the amount of applied energy is not increased.

1 is a schematic view of a waste water sludge melting and waste heat recovery apparatus according to an embodiment of the present invention,
FIG. 2 is a block diagram showing the operation sequence of each waste water sludge melting and waste heat recovery apparatus shown in FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, at the time of the present application, It should be understood that variations can be made.

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

1 is a schematic view of a waste water sludge melting and waste heat recovery apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the waste water sludge melting and waste heat recovery apparatus 10 according to the present invention recycles wastewater sludge S containing a dried heavy metal, and the wastewater sludge S is melted, Slag is generated, and waste heat generated in the process is recovered. The waste water sludge melting and waste heat recovery apparatus 10 includes a first conduit 100, a molten metal 200, a second conduit 300, and a heat exchange unit 400.

Here, the wastewater sludge (S) may be discharged from a facility such as a steelmaking process, a metal working process, a plating process, a leather process, and a paint industry process, but is not limited thereto. The heavy metal in the wastewater sludge S may include at least one selected from the group consisting of arsenic, mercury, chromium, copper, cadmium, lead and nickel, and the concentration of the heavy metal is preferably 1 to 100,000 mg / Kg. At this time, the wastewater sludge S is preferably dried.

The first conduit 100 is disposed in a tubular shape and is inclined downward. At this time, the first pipeline 100 is formed with an inlet portion 101 through which the wastewater sludge is drawn, and a slag discharge portion 102 through which slag generated from the wastewater sludge is discharged is formed at the lower end. At this time, the wastewater sludge (S) in the dried state is introduced into the inlet (101). At this time, a mixture of waterglass and quicklime (CaO) together with the wastewater sludge (S) may be added. At this time, the addition amount of the mixture may be 1.0-20.0 wt% of the total amount of the wastewater sludge and the mixture. More preferably, a mixture of water glass and calcium oxide (CaO) is added to maintain the internal temperature of the first conduit 100 at 1,240 to 1400 ° C, And may be 1.0 to 15.0 wt% of the total amount.

The first conduit 100 is preferably made of a refractory wall 103 containing a heat-resistant material and is not damaged by the high temperature of the wastewater sludge S.

The molten metal 200 is disposed at a lower side of one side of the interior of the first conduit 100 that provides a path of movement of the wastewater sludge. At this time, the molten metal forms an accommodation space in which the wastewater sludge (S) drawn in by the inclination of the first conduit (100) and the mixture are temporarily accommodated. At this time, the wastewater sludge (S) and the mixture are mixed and melted into the receiving space. At this time, the water glass in the mixture and the calcium oxide (CaO) react with each other to generate heat, thereby raising the temperature of the wastewater sludge. At this time, the temperature of the molten metal 200 is preferably maintained at 1,250 to 1,400 ° C. In addition, the wastewater sludge (S) is pyrolyzed in the molten metal (200), and the minerals and heavy metals in the wastewater sludge (S) are melted together to form slag. At this time, the wastewater sludge S releases exhaust gas.

The second conduit 300 branches from the lower side of the molten metal 200 of the first conduit 100. At this time, the second conduit 300 is branched at an angle to the first conduit 100 and upward. At this time, the second channel 300 is provided therein with a heat exchanging unit 400 to be described later. In addition, the second conduit 300 is formed with an exhaust gas discharge unit 301 through which the exhaust gas generated in the wastewater sludge is discharged. At this time, the side wall of the second conduit 300 may be formed with an air inlet 302 through which the outside air flows into the outside.

The heat exchange unit 400 is disposed inside the second conduit 300 to recover the heat of the exhaust gas discharged from the wastewater sludge. The heat exchange unit 400 may include a waste heat boiler 410 and a heat exchanger 420 connected to the waste heat boiler 410. At this time, the waste heat boiler 410 collects exhaust gas flowing into the second conduit 300 and completely burns it to generate heat. At this time, the exhaust gas may include a combustion gas and an incomplete combustion gas. The heat exchanger 420 generates high temperature steam using the heat generated from the waste heat boiler 410 and provides a heat source to other facilities (not shown).

The wastewater sludge melting and waste heat recovery apparatus 10 may further include an auxiliary fuel burner 500 for heating the molten metal 200 to increase the temperature of the exhaust gas generated in the molten metal 200. At this time, the auxiliary fuel burner 500 is preferably disposed on the upper side of the molten metal 200.

The waste water sludge melting and waste heat recovery apparatus 10 may further include a slag collecting unit 600 disposed under the first pipe 100. The slag collecting unit 600 recovers slag formed by melting the wastewater sludge S in the molten metal 200.

The wastewater sludge melting and waste heat recovery apparatus 10 may include a third conduit 700 to facilitate the discharge of the slag. The third conduit 700 communicates with the slag discharge unit 102 of the first conduit 100 to guide the slag to the slag collector 600. At this time, the first, second, and third conduits 100, 300, and 700 are preferably Y-shaped. Also, the internal temperature of the first, second, and third conduits 100, 300, and 700 is preferably maintained at 1,240 to 1,400 ° C. When the internal temperature is lower than 1,240 ° C, the wastewater sludge is not sufficiently melted. As a result, the molten slag is vitrified by eluting the molten slag, and when the internal temperature exceeds 1,400 ° C, There is a problem that the amount of input energy due to the maintenance of the internal temperature of the melting furnace increases more than necessary.

The third conduit 700 may be formed of the refractory wall 103.

Hereinafter, the operation of the waste water sludge melting apparatus and waste heat recovering apparatus 10 will be described with reference to FIG. Here, FIG. 2 is a block diagram showing the operation sequence of the waste water sludge melting and waste heat recovery apparatus 10 shown in FIG. 1.

The wastewater sludge S containing heavy metals is first drawn into the inlet portion 101 of the first conduit 100 in a dried state from an external facility. And is accommodated in the receiving space of the molten metal (200) on the wall surface of the first conduit (100). At this time, it is preferable that the wastewater sludge S is dried by the heat in the first conduit 100 in the course of flowing into the molten metal 200 on the wall surface of the first conduit 100. At this time, the heat is discharged from the exhaust gas generated by melting the wastewater sludge (S) in the molten metal (200). The wastewater sludge S contained in the molten metal 200 is pyrolyzed and melted to produce a slag composed of heavy metals and minerals contained in the wastewater sludge S and an exhaust gas. At this time, it is preferable that the exhaust gas includes a complete combustion gas and an incomplete combustion gas.

At this time, the slag is introduced into the third duct 700 through the slag discharge unit 102 at the lower end of the first duct 100. And is guided to the slag collecting unit 600 along the third duct 700.

On the other hand, the exhaust gas moves to the waste heat boiler 410 and is completely burned to generate heat. The heat of the waste heat boiler 410 is transferred to the heat exchanger 420 to generate high temperature steam and provide a heat source to the external equipment. The exhaust gas that has been used in the heat exchanging unit 400 is discharged to the outside.

The waste water sludge melting and waste heat recovery apparatus 10 has the following effects. First, the wastewater sludge (S) introduced into the inlet portion 101 spontaneously undergoes drying, pyrolysis and melting processes while flowing in the first conduit 100 by itself, Do. Secondly, by disposing the molten metal 200 and the heat exchanging part 400 in the first conduit 100 and the second conduit 300, the exhaust gas generated in the molten metal 200 can be efficiently transferred to the heat exchanging part 400 Thereby improving the recovery efficiency of waste heat. Thirdly, the molten metal 200 is disposed in the first conduit 100, and the heat of the exhaust gas is transferred to the wastewater sludge that has passed through the inlet portion 101, and the wastewater sludge 200 is dried with its own heat .

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: first channel
101: inlet
102: Slag discharge section
200: melt
300: second channel
301: Flue gas discharge section
400: heat exchanger
302: Air inflow
400: heat exchanger
410: Waste heat boiler
420: heat exchanger
500: Auxiliary fuel burner
600: slag collecting part
700: third conduit

Claims (9)

A waste water sludge melting and waste heat recovery apparatus for melting waste water sludge containing heavy metals and recovering waste heat discharged from the waste sludge,
And a slag discharging portion for discharging slag generated from the wastewater sludge is formed at a lower end of the inlet portion and is slanted downwardly from the inlet portion to the slag discharging portion, Lt; 0 >C;
Wherein the waste water sludge and the mixture, which are disposed in the first conduit at a lower side of one side of the movement path of the wastewater sludge, and which move through the first conduit, are temporarily accommodated, A molten metal for melting the wastewater sludge;
A second conduit branching upward from the lower side of the molten metal in the first conduit and having an upper portion formed with an exhaust gas discharge portion through which exhaust gas generated in the wastewater sludge is discharged and whose internal temperature is maintained at 1,240 to 1400 ° C;
A heat exchanger disposed inside the second conduit for recovering heat of the exhaust gas; And
Wherein the waste water sludge is disposed on an upper portion of one side of the first conduit on the path of the wastewater sludge through the first conduit and is disposed directly above the molten metal and continuously operated, And an auxiliary fuel burner for increasing the temperature of the exhaust gas generated in the molten metal by applying heat to the molten metal.
delete The method according to claim 1,
And a slag collecting unit disposed below the first duct for collecting slag discharged from the slag discharging unit. The method of claim 3,
And a third conduit communicating with a lower portion of the first conduit and guiding the slag discharged from the slag discharge portion to the slag collecting portion and maintaining an internal temperature at 1,240 to 1400 ° C. The method according to claim 1,
Wherein the heavy metal in the wastewater sludge comprises at least one selected from the group consisting of arsenic, mercury, chromium, copper, cadmium, lead, and nickel. The method according to claim 1,
Wherein the concentration of the heavy metal in the wastewater sludge is 1 to 100,000 mg / Kg. The method according to claim 1,
Wherein the mixture is added to the wastewater sludge drawn into the inlet, wherein the mixture is mixed with water glass and calcium oxide (CaO), and the addition amount of the mixture is 1.0-20.0 wt% of the total amount of the wastewater sludge and the mixture, And a waste heat recovery device. The method of claim 4,
Wherein the first pipe, the second pipe, and the third pipe have an internal temperature of 1,240 to 1,400 ° C. The method of claim 8,
Wherein the mixture is added to the wastewater sludge drawn into the inlet, wherein the mixture is mixed with water glass and calcium oxide, and the addition amount of the mixture is 1.0 to 15.0 wt% of the total amount of the wastewater sludge and the mixture, And a waste heat recovery device.
KR1020150135503A 2015-09-24 2015-09-24 Apparatus for melting waste sludge and recovering waste heat KR101802598B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102519632B1 (en) * 2022-04-12 2023-04-11 한밭대학교 산학협력단 Waste melting Vitrification device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111689668A (en) * 2019-03-15 2020-09-22 中国石油化工股份有限公司 Harmless recycling treatment method for petrochemical excess sludge
CN114196408B (en) * 2021-12-01 2024-04-19 重庆工商大学 Arsenic-polluted farmland stabilizer, preparation method and application thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001163660A (en) * 1999-09-29 2001-06-19 Taiheiyo Cement Corp Hardenable composition and hardened body

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001163660A (en) * 1999-09-29 2001-06-19 Taiheiyo Cement Corp Hardenable composition and hardened body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102519632B1 (en) * 2022-04-12 2023-04-11 한밭대학교 산학협력단 Waste melting Vitrification device

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