CN110903002A - Integrated harmless ultimate disposal device for sludge drying pyrolysis - Google Patents

Integrated harmless ultimate disposal device for sludge drying pyrolysis Download PDF

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Publication number
CN110903002A
CN110903002A CN201811071826.1A CN201811071826A CN110903002A CN 110903002 A CN110903002 A CN 110903002A CN 201811071826 A CN201811071826 A CN 201811071826A CN 110903002 A CN110903002 A CN 110903002A
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CN
China
Prior art keywords
pyrolysis
drying
sludge
drum
combustion chamber
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Pending
Application number
CN201811071826.1A
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Chinese (zh)
Inventor
耿海榕
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Shanghai Hui Hui Ecological Environment Technology Co Ltd
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Shanghai Hui Hui Ecological Environment Technology Co Ltd
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Priority to CN201811071826.1A priority Critical patent/CN110903002A/en
Publication of CN110903002A publication Critical patent/CN110903002A/en
Pending legal-status Critical Current

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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
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/52—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen 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
    • C02F11/10—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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B01D2257/2045—Hydrochloric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

Abstract

The invention relates to an integrated harmless ultimate treatment device for sludge drying and pyrolysis, which comprises a primary drying device, a drying and pyrolysis device and a flue gas purification device which are sequentially connected, wherein the primary drying device comprises a conditioning tank, a medicine adding device, a stirrer, a plate-and-frame filter press, a delivery pump and a crusher; the drying pyrolysis device comprises a drying drum, a filtering separator, a condenser, a combustion chamber and a pyrolysis drum which are sequentially connected, wherein the pyrolysis drum and the combustion chamber are in bidirectional connection, and a bundling pipe with high-temperature steam communicated inside is arranged in the drying drum. The invention integrates the advantages of sludge drying and pyrolysis, has high technical stability, is basically not influenced by other various factors, does not generate harmful substances such as dioxin and the like in the whole treatment process, can recycle pyrolysis gas generated by pyrolysis, reduces energy consumption in sludge treatment, reduces pollution to the environment in sludge treatment, and has economic benefit and social benefit.

Description

Integrated harmless ultimate disposal device for sludge drying pyrolysis
Technical Field
The invention relates to the technical field of sludge drying, in particular to an integrated harmless final treatment device for sludge drying pyrolysis.
Background
The organic sludge is a sediment substance generated in the sewage treatment process, contains a large amount of microorganisms, organic matters, rich nutrient substances such as nitrogen, phosphorus, potassium and the like, and also contains overproof heavy metals, pathogenic microorganisms and the like, and serious secondary pollution can be caused if the treatment is not good. The general goal of sludge treatment disposal is to ensure that toxic hazardous substances in the sludge, whether present or in the future, do not pose an unacceptable harm to the environment. At present, the main treatment modes of sludge comprise landfill, biological utilization, incineration and the like, and the main problems of landfill are the generation of landfill leachate and gas and serious land waste; the heavy metals in the sludge are difficult to remove, the requirement on the sludge is high, and the biological utilization is difficult to popularize; the disadvantages of incineration include high investment in treatment facilities, high treatment cost, high maintenance cost of equipment, and generation of strong carcinogenic dioxin, which pollutes the environment.
Disclosure of Invention
In view of the above, the present invention provides an integrated harmless final treatment device for sludge drying and pyrolysis, so as to solve the defects in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the integrated harmless ultimate disposal device for sludge drying pyrolysis comprises a preliminary drying device, a drying pyrolysis device and a flue gas purification device which are sequentially connected, wherein the preliminary drying device comprises a conditioning tank, a medicine adding device, a stirrer, a plate-and-frame type filter press, a conveying pump and a crusher, the medicine adding device quantitatively and fixedly adds a sludge conditioner into the conditioning tank, the sludge conditioner is stirred by the stirrer and then conveyed to the plate-and-frame type filter press through the conveying pump for filter pressing, and the sludge conditioner is crushed by the crusher and then discharged; the drying pyrolysis device comprises a drying drum, a filtering separator, a condenser, a combustion chamber and a pyrolysis drum which are sequentially connected, wherein the pyrolysis drum is in two-way connection with the combustion chamber, and a bundling pipe with high-temperature steam is arranged in the drying drum.
The integrated harmless ultimate disposal device for sludge drying and pyrolysis is characterized in that the conditioning tank is of a steel structure lined with glass fiber reinforced plastics or a concrete structure.
The integrated harmless ultimate treatment device for sludge drying and pyrolysis comprises an SCR denitration device and a bag type dust collector.
Compared with the prior art, the invention has the beneficial effects that:
the advantages of sludge drying and pyrolysis are integrated, the technical stability is high, the sludge drying and pyrolysis treatment method is basically not influenced by other various factors, harmful substances such as dioxin and the like are not generated in the whole treatment process, pyrolysis gas generated by pyrolysis can be recycled, the energy consumption in sludge treatment is reduced, the pollution to the environment in sludge treatment is reduced, and the sludge drying and pyrolysis treatment method has economic and social benefits.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic structural diagram of an integrated harmless final treatment device for sludge drying and pyrolysis.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, the integrated harmless final treatment device for sludge drying and pyrolysis comprises a primary drying device 1, a drying and pyrolysis device 2 and a flue gas purification device 3 which are sequentially connected, wherein the primary drying device 1 comprises a conditioning tank 11, a medicine feeder 12, a stirrer 13, a plate and frame type filter press 14, a delivery pump 15 and a crusher 16, the sludge conditioner is fed into the conditioning tank 11 at a fixed amount and a fixed point by the medicine feeder 12, is stirred by the stirrer 13, is conveyed to the plate and frame type filter press 14 by the delivery pump 15 for filter pressing, and is crushed by the crusher 16 and then discharged. The drying pyrolysis device 2 comprises a drying drum 21, a filtering separator 22, a condenser 23, a combustion chamber 24 and a pyrolysis drum 25 which are connected in sequence, the pyrolysis drum 25 and the combustion chamber 24 are connected in a bidirectional mode, and a bundling pipe with high-temperature steam communicated inside is arranged in the drying drum 21. In the technical scheme, the conditioning tank 11 is of a steel structure and is lined with glass fiber reinforced plastic or a concrete structure, and the flue gas purification device 3 comprises an SCR pin removal device 31 and a bag type dust collector 32.
Conveying sludge with the water content of about 97.5% in the sludge storage tank to a conditioning tank 11, adding a sludge conditioning agent to the conditioning tank 11 at a fixed amount and a fixed point by a medicine adding device 12 for conditioning and modifying, mixing and stirring to improve the dehydration performance, pumping the sludge after full reaction and uniform mixing to a plate and frame type filter press 14 for filter pressing, reducing the water content of the sludge after filter pressing and dehydration to below 60%, and discharging after crushing. The sludge drying adopts drum type steam indirect drying, steam is used as a heat transfer medium, and the steam circulates in a bundling pipe in the drying drum 21 and is not in direct contact with sludge. The sludge is gradually dried, the dried sludge and the moisture are separated at an outlet, and the moisture content of the dried sludge is between 10 and 30 percent. The gas discharged from the drying drum 21 is treated by a condenser 23 to separate moisture and dust from other gases, and all the gases except the moisture and dust are introduced into a combustion chamber 24 to be combusted, and condensed water is returned to a sewage treatment plant. The steam for drying is condensed and then flows back to the waste heat boiler to be used as boiler feed water, the whole drying process is controlled in a micro negative pressure state, and bad gases such as odor and the like in the treatment process are prevented from escaping. The dried sludge is directly conveyed into a pyrolysis drum 25 through a conveying device, the working pressure in the pyrolysis drum 25 is about 10 mbar, the pyrolysis drum is basically in a vacuum state, the temperature in the drum is about 600 ℃, the sludge is heated for about 45-60 minutes under the anaerobic condition, and organic matters in the sludge are thermally cracked to form pyrolysis gas and solid residues. The pyrolysis gas is fed into the combustion chamber 24 to be combusted, so as to generateOne part of the flue gas provides the energy required by the pyrolysis drum 25, the other part of the flue gas enters the waste heat boiler to exchange heat with water to generate steam, the steam generated by the waste heat boiler flows back to the drying device to provide energy for drying the sludge, the tail gas at the outlet of the waste heat boiler passes through the flue gas purification device 3 and then is discharged after reaching the standard, and the solid residue generated by pyrolysis enters the slag cooler to be cooled and then is discharged. The flue gas from the waste heat boiler enters a flue after catalytic denitration (SCR), and Ca (OH) is added2And the flue gas is sent into a reactor through a spiral feeder to react with acidic substances such as sulfur dioxide, hydrogen chloride and the like in the flue gas, most harmful substances such as sulfur dioxide, hydrogen chloride and the like are eliminated, the flue gas enters a bag type dust collector 32 through an outlet at the top of the reactor to eliminate most soot, most fine ash removed by the dust collector circularly enters the reactor through an air chute, a small amount of fine ash passes through an ash discharging device and is discharged to an ash conveying system for discharge, and the purified flue gas is discharged into the atmosphere through a draft fan and a chimney.
As can be seen from the above embodiments, the advantages of the present invention are:
the advantages of sludge drying and pyrolysis are integrated, the technical stability is high, the sludge drying and pyrolysis treatment method is basically not influenced by other various factors, harmful substances such as dioxin and the like are not generated in the whole treatment process, pyrolysis gas generated by pyrolysis can be recycled, the energy consumption in sludge treatment is reduced, the pollution to the environment in sludge treatment is reduced, and the sludge drying and pyrolysis treatment method has economic and social benefits.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the above-described embodiments, which are only examples. Any equivalent modifications and substitutions for those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.

Claims (3)

1. An integrated harmless ultimate treatment device for sludge drying pyrolysis is characterized by comprising a preliminary drying device, a drying pyrolysis device and a flue gas purification device which are sequentially connected, wherein the preliminary drying device comprises a conditioning tank, a dosing device, a stirrer, a plate-and-frame type filter press, a conveying pump and a crusher, a sludge conditioner is quantitatively and fixedly dosed into the conditioning tank by the dosing device, the sludge conditioner is conveyed to the plate-and-frame type filter press for filter pressing through the conveying pump after being stirred by the stirrer, and then the sludge conditioner is crushed by the crusher and discharged; the drying pyrolysis device comprises a drying drum, a filtering separator, a condenser, a combustion chamber and a pyrolysis drum which are sequentially connected, wherein the pyrolysis drum is in two-way connection with the combustion chamber, and a bundling pipe with high-temperature steam is arranged in the drying drum.
2. The integrated harmless final treatment device for drying and pyrolyzing sludge according to claim 1, wherein the conditioning tank is of a steel structure with a lining of glass fiber reinforced plastics or a concrete structure.
3. The integrated harmless final treatment device for sludge drying and pyrolysis according to claim 1, wherein the flue gas purification device comprises an SCR denitration device and a bag type dust collector.
CN201811071826.1A 2018-09-14 2018-09-14 Integrated harmless ultimate disposal device for sludge drying pyrolysis Pending CN110903002A (en)

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CN201811071826.1A CN110903002A (en) 2018-09-14 2018-09-14 Integrated harmless ultimate disposal device for sludge drying pyrolysis

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112374710A (en) * 2020-11-20 2021-02-19 广州市凯卫莎环保科技有限公司 Sludge dewatering and drying process technology and dewatering and drying system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100695457B1 (en) * 2006-02-21 2007-03-16 한밭대학교 산학협력단 Preparation for the clean reforming gas and recycling vitrification materials from the waste oil and sludge containing and equipment thereof
CN202558749U (en) * 2012-05-07 2012-11-28 浙江利保环境工程有限公司 Improved device for sludge pyrolysis treatment
CN106145605A (en) * 2016-08-30 2016-11-23 中电环保股份有限公司 A kind of energy-saving sludge drying technique and device
CN206783512U (en) * 2017-05-03 2017-12-22 南京万德斯环保科技股份有限公司 A kind of compound quenched deep dehydration of sludge, desiccation, carbonization treatment disposal system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100695457B1 (en) * 2006-02-21 2007-03-16 한밭대학교 산학협력단 Preparation for the clean reforming gas and recycling vitrification materials from the waste oil and sludge containing and equipment thereof
CN202558749U (en) * 2012-05-07 2012-11-28 浙江利保环境工程有限公司 Improved device for sludge pyrolysis treatment
CN106145605A (en) * 2016-08-30 2016-11-23 中电环保股份有限公司 A kind of energy-saving sludge drying technique and device
CN206783512U (en) * 2017-05-03 2017-12-22 南京万德斯环保科技股份有限公司 A kind of compound quenched deep dehydration of sludge, desiccation, carbonization treatment disposal system

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Title
梁国安: "《电站锅炉操作技术》", 31 October 2012, 中国计划出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112374710A (en) * 2020-11-20 2021-02-19 广州市凯卫莎环保科技有限公司 Sludge dewatering and drying process technology and dewatering and drying system

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Application publication date: 20200324