CN110966609A - System and method for coupling treatment of household garbage and sludge - Google Patents

System and method for coupling treatment of household garbage and sludge Download PDF

Info

Publication number
CN110966609A
CN110966609A CN201911378134.6A CN201911378134A CN110966609A CN 110966609 A CN110966609 A CN 110966609A CN 201911378134 A CN201911378134 A CN 201911378134A CN 110966609 A CN110966609 A CN 110966609A
Authority
CN
China
Prior art keywords
pyrolysis
sludge
flue gas
temperature flue
garbage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911378134.6A
Other languages
Chinese (zh)
Inventor
杨翠广
代锁柱
王超
代江燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Yunshui Haorui Environmental Technology Co ltd
Original Assignee
Beijing Yunshui Haorui Environmental Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Yunshui Haorui Environmental Technology Co ltd filed Critical Beijing Yunshui Haorui Environmental Technology Co ltd
Priority to CN201911378134.6A priority Critical patent/CN110966609A/en
Publication of CN110966609A publication Critical patent/CN110966609A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • F23G5/0273—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage using indirect heating
    • 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
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • 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
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a system and a method for coupling treatment of household garbage and sludge. The coupling system comprises a garbage drying device, a garbage pyrolysis device, a first combustion device, a sludge drying device, a sludge pyrolysis device, a second combustion device and a tail gas purification device, wherein the first combustion device is connected with a pyrolysis volatile component outlet of the garbage pyrolysis device, and a high-temperature flue gas outlet of the first combustion device is connected with a high-temperature flue gas inlet of the garbage pyrolysis device; the second combustion device is respectively connected with a pyrolysis volatile component outlet of the sludge pyrolysis device and a pyrolysis volatile component outlet of the garbage pyrolysis device, and a high-temperature flue gas outlet of the second combustion device is connected with a high-temperature flue gas inlet of the sludge pyrolysis device. The system not only can fully utilize surplus pyrolysis oil, gas and heat thereof in the garbage pyrolysis process, but also can ensure the stable and long-period operation of the garbage pyrolysis process.

Description

System and method for coupling treatment of household garbage and sludge
Technical Field
The invention belongs to the field of solid waste treatment, and particularly relates to a system and a method for coupling treatment of household garbage and sludge.
Background
In recent years, with the enhancement of environmental awareness and the successive emergence of increasingly strict national environmental regulations and policies, the "reduction, recycling and harmless" of solid waste treatment and disposal has become a basic principle to be followed in solid waste treatment. The solid waste pyrolysis technology according with the principle solves the problems that the control cost of pollutants such as heavy metal, dioxin and the like in smoke in the incineration process of solid waste is high, the effect is not ideal and the like, and carbon slag obtained by the solid waste under the conditions of high temperature and oxygen-free atmosphere in the pyrolysis process can form hard and brittle inert solid products (biochar) with inorganic matters and metal components in materials, the hard and brittle inert solid products are products obtained after harmful substances such as chlorine, sulfur and the like are removed by the primary solid waste through thermal decomposition, and the leachability of the heavy metal is weaker than that of the slag of the solid waste incineration and gasification heat treatment furnace, so that the subsequent further treatment operation can be safely and conveniently carried out. Compared with solid waste incineration, the solid waste pyrolysis process needs certain scale benefit to realize external heat supply and power supply, has the advantage of flexible scale of solid waste treatment by the device, and is particularly suitable for heat treatment of solid waste in small and medium-sized cities, towns and the like.
However, along with the increase of the living standard of people, the content of organic substances in the household garbage of residents is increased, the heat value of the household garbage is also increased compared with that of the household garbage in the previous years, and the heat value of the dry garbage is further increased along with the implementation of a garbage classification policy. For the treatment process of utilizing the combustion of the garbage pyrolysis oil gas to supply heat for the drying and pyrolysis of the garbage, the improvement of the heat value of the garbage can lead the heat of the pyrolysis oil gas to be rich, if the rich oil gas enters the combustion chamber of the pyrolysis chamber, the temperature of the combustion chamber is rapidly increased, and further the temperature of the pyrolysis chamber is rapidly increased, so that the garbage in the pyrolysis chamber generates more pyrolysis oil and gas, and then the whole pyrolysis process is difficult to control.
Therefore, the garbage treatment process still needs to be further improved to ensure the stable and long-term operation of the household garbage pyrolysis process.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a system and a method for coupling domestic garbage and sludge, wherein the coupling system not only can fully utilize surplus pyrolysis oil, gas and heat thereof in the garbage pyrolysis process, but also can ensure stable and long-term operation of the garbage pyrolysis process.
The present invention is mainly based on the following problems and findings:
in the existing garbage treatment process, pyrolysis oil gas is matched with a boiler and a steam turbine for use to generate or supply heat, but at present, many garbage pyrolysis treatment projects are not large in treatment scale, pyrolysis oil and pyrolysis gas achieve self-heating balance in the pyrolysis process, and abundant oil and gas heat are relatively small, for example, the design treatment capacity of domestic garbage in a rotary kiln pyrolysis process project in the southwest region aiming at treating the domestic garbage in 2 counties around is 200t/d, the abundant oil and gas heat energy of the project can only be provided with a 1.5-2 MW steam turbine to generate power, the investment of the boiler and the steam turbine equipment is huge, the scale benefit is not good, the investment and treatment cost are not reduced, and the domestic garbage materials in the pyrolysis process are complex, the component change easily causes external supply pyrolysis oil and gas quantity instability, and the boiler produces steam and the stable operation of the steam turbine is not good; after oil and gas are condensed and separated, only non-condensable gas is used for combustion to provide heat energy for pyrolysis reaction, however, the condensation and separation of pyrolysis oil and gas containing a large amount of dust is a bottleneck problem which affects the stability and long period of a pyrolysis process, and the whole system is very easy to stop due to blockage of pipelines or condensing equipment in the operation process; in addition, the biochemical waste and the municipal sludge are mixed and then pyrolyzed, but the process has the starting point of utilizing the synergistic effect of reduced kinetic activation energy in the co-pyrolysis process, does not consider the problem of full utilization of abundant pyrolysis oil and gas of the waste, and under the condition of large mass ratio change, the co-treatment process is difficult to stably run for a long period due to the difference of suitable transportation, drying and pyrolysis equipment of respective materials due to different characteristics of the domestic waste and the sludge, and the problems of unstable pyrolysis, poor pyrolysis degree, nonuniform pyrolysis and the like are easy to occur in the pyrolysis treatment process. In addition, the inventor also finds that although the domestic garbage and the sludge belong to the same solid waste, due to the difference of the respective characteristics such as water content, heat value and the like, the domestic garbage and the sludge entering the pyrolysis treatment system have different requirements on external heat when the pyrolysis treatment is adopted, and the sludge drying pyrolysis treatment process needs to be supplemented with fuel to ensure the normal and stable operation of the process.
To this end, according to a first aspect of the invention, the invention proposes a system for coupling the treatment of domestic waste with sludge. According to an embodiment of the invention, the system comprises:
the garbage drying device comprises a wet garbage inlet, a first medium-temperature flue gas inlet, a first low-temperature flue gas outlet and a dry garbage outlet;
the garbage pyrolysis device comprises a dry garbage inlet, a first high-temperature flue gas inlet, a first semicoke outlet, a first pyrolysis volatile component outlet and a first medium-temperature flue gas outlet, and the first medium-temperature flue gas outlet is connected with the first medium-temperature flue gas inlet;
the first combustion device is provided with a first gas inlet, a first pyrolysis volatile component inlet and a first high-temperature flue gas outlet, the first pyrolysis volatile component inlet is connected with the first pyrolysis volatile component outlet, and the first high-temperature flue gas outlet is connected with the first high-temperature flue gas inlet;
the sludge drying device comprises a wet sludge inlet, a second medium-temperature flue gas inlet, a second low-temperature flue gas outlet and a dry sludge outlet;
the sludge pyrolysis device comprises a dry sludge inlet, a second high-temperature flue gas inlet, a second semicoke outlet, a second pyrolysis volatile component outlet and a second medium-temperature flue gas outlet, and the second medium-temperature flue gas outlet is connected with the second medium-temperature flue gas inlet;
the second combustion device is provided with a second fuel gas inlet, a second pyrolysis volatile component inlet, a third pyrolysis volatile component inlet and a second high-temperature flue gas outlet, the second pyrolysis volatile component inlet is connected with the second pyrolysis volatile component outlet, the third pyrolysis volatile component inlet is connected with the first pyrolysis volatile component outlet, and the second high-temperature flue gas outlet is connected with the second high-temperature flue gas inlet;
tail gas cleanup unit, tail gas cleanup unit includes tail gas import and purified gas outlet, the tail gas import respectively with first low temperature exhanst gas outlet with second low temperature exhanst gas outlet links to each other.
The system for coupling treatment of domestic garbage and sludge provided by the embodiment of the invention at least has the following advantages: 1. on the premise of coupling the household garbage and the sludge pyrolysis system, the utilization problem of abundant pyrolysis oil, gas and heat of the garbage pyrolysis system is solved, and the problem that the sludge treatment cost is high due to the fact that high-cost fuel needs to be supplemented due to insufficient heat of the sludge pyrolysis system is solved; 2. the problems that the co-treatment processes of conveying, drying, pyrolysis and the like of the materials are difficult to stabilize and operate for a long period, pyrolysis is unstable, the pyrolysis degree is poor, pyrolysis is not uniform and the like due to different characteristics of the household garbage and the sludge can be effectively avoided; 3. this coupled system uses the gas as the means of regulation and control heat distribution, can preferentially guarantee rubbish pyrolysis device temperature and satisfy the design requirement, it is complete to ensure the pyrolysis, the abundant heat of rubbish pyrolysis only partially satisfies or is close to the outer pyrolysis heat demand of all satisfying the desilt pyrolysis self-heating, the heat of not enough part is with the gas as the replenishment, use less or be close to not using the gas, make the gas handle the means of regulation of flexibility as entire system, both guaranteed the complete and steady operation's of rubbish pyrolysis purpose, the reduction of mud pyrolysis process manufacturing cost has been guaranteed again, the dual purpose of mutually benefiting win-win has been played, the difficult problem of popularization of domestic waste pyrolysis processing system and mud pyrolysis processing system has been explained.
In addition, the system for coupling domestic garbage and sludge according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the waste drying device and the sludge drying device are each independently a contact drying device or an indirect drying device, and the waste pyrolysis device and the sludge pyrolysis device are each independently a dividing wall pyrolysis device or a regenerative pyrolysis device.
In some embodiments of the present invention, the system for coupling domestic garbage and sludge treatment further comprises: and a discharge port of the garbage crushing device is connected with the wet garbage inlet through a screw feeder.
In some embodiments of the present invention, the system for coupling domestic garbage and sludge treatment further comprises: the sludge crushing device comprises a sludge concentration device and a sludge crushing device, wherein a feed inlet of the sludge crushing device is connected with a discharge outlet of the sludge concentration device, and a discharge outlet of the sludge crushing device is connected with a wet sludge inlet.
In some embodiments of the present invention, the system for coupling domestic garbage and sludge treatment further comprises: and the cooling device is respectively connected with the first semicoke outlet and the second semicoke outlet.
In some embodiments of the invention, the cooling device is a screw cooler and/or a first waste heat boiler.
In some embodiments of the present invention, the system for coupling domestic garbage and sludge treatment further comprises: and the first low-temperature flue gas outlet and the second low-temperature flue gas outlet are respectively connected with the tail gas inlet through the second waste heat boiler.
In some embodiments of the present invention, the system for coupling domestic garbage and sludge treatment further comprises: the system comprises a garbage pre-drying device and a sludge pre-drying device, wherein a discharge port of the garbage pre-drying device is connected with a wet garbage inlet, the garbage pre-drying device is provided with a first preheating air inlet and a first cold air outlet, the first preheating air inlet is connected with a first low-temperature flue gas outlet, and the first cold air outlet is connected with a tail gas inlet; the discharge port of the sludge pre-drying device is connected with the wet sludge inlet, the sludge pre-drying device is provided with a second preheating air inlet and a second cold air outlet, the second preheating air inlet is connected with the second low-temperature flue gas outlet, and the second cold air outlet is connected with the tail gas inlet.
According to a second aspect of the invention, the invention provides a method for implementing coupling treatment of domestic garbage and sludge by using the coupling treatment system of domestic garbage and sludge. According to an embodiment of the invention, the method comprises:
(1) supplying the domestic garbage into the garbage drying device for drying treatment so as to obtain dry garbage;
(2) feeding the dry garbage to a garbage pyrolysis device to carry out pyrolysis treatment so as to obtain first semicoke and first pyrolysis volatile matter;
(3) supplying a part of the first pyrolysis volatile component to the first combustion device for combustion so as to obtain first high-temperature flue gas, reusing the first high-temperature flue gas in the step (2) for supplying heat for the pyrolysis treatment so as to obtain first medium-temperature flue gas, and reusing the first medium-temperature flue gas in the step (1) for supplying heat for the drying treatment so as to obtain first low-temperature flue gas;
(4) feeding the sludge into the sludge drying device for drying treatment so as to obtain dry sludge;
(5) feeding the dry sludge into a sludge pyrolysis device for pyrolysis treatment so as to obtain second semicoke and second pyrolysis volatile matter;
(6) supplying the second pyrolysis volatile component, a part of the first pyrolysis volatile component and/or fuel gas to the second combustion device for combustion so as to obtain second high-temperature flue gas, reusing the second high-temperature flue gas in the step (5) for supplying heat for the pyrolysis treatment so as to obtain second medium-temperature flue gas, and reusing the second medium-temperature flue gas in the step (4) for supplying heat for the drying treatment so as to obtain second low-temperature flue gas;
(7) and supplying the first low-temperature flue gas and the second low-temperature flue gas to the tail gas purification device for purification treatment so as to obtain purified flue gas.
The method for coupling treatment of domestic garbage and sludge provided by the embodiment of the invention at least has the following advantages: 1. by performing coupling treatment on the household garbage and the sludge through pyrolysis, the problems of utilization of abundant pyrolysis oil gas and heat thereof in the garbage pyrolysis process and high sludge treatment cost caused by the fact that high-cost fuel needs to be supplemented due to insufficient heat in the sludge pyrolysis process are solved; 2. the problems that the co-treatment processes of conveying, drying, pyrolysis and the like of the materials are difficult to stabilize and operate for a long period, pyrolysis is unstable, the pyrolysis degree is poor, pyrolysis is not uniform and the like due to different characteristics of the household garbage and the sludge can be effectively avoided; 3. can regard as the means of regulation and control heat distribution with the gas, it satisfies the design requirement to guarantee preferentially that rubbish pyrolysis temperature, it is complete to ensure the pyrolysis, the abundant heat of rubbish pyrolysis only partially satisfies or is close to the pyrolysis heat needs that all satisfy except that the mud pyrolysis supplies heat, the heat of not enough part is as the replenishment with the gas, use less or be close to not using the gas, make the gas handle the means of regulation of flexibility as entire system, both guaranteed the complete and steady operation's of rubbish pyrolysis purpose, the reduction of mud pyrolysis process manufacturing cost has been guaranteed again, the dual purpose of mutually benefiting win-win has been played, the difficult problem of popularization of domestic waste pyrolysis processing system and mud pyrolysis processing system has been explained.
In some embodiments of the present invention, the drying treatment in step (1) and the drying treatment in step (3) are independently conducted by contact heat exchange or indirect heat exchange, and the pyrolysis treatment in step (2) and the pyrolysis treatment in step (4) are independently conducted by dividing wall heating or regenerative heating.
In some embodiments of the present invention, the domestic waste is subjected to a crushing treatment in advance before the step (1) is performed, and the sludge is subjected to a concentration treatment and a crushing treatment in advance before the step (4) is performed.
In some embodiments of the present invention, step (2) further comprises: cooling and/or waste heat recovery treatment is carried out on the first semicoke, and the step (4) further comprises the following steps: and carrying out cooling treatment and/or waste heat recovery treatment on the second semicoke.
In some embodiments of the invention, the first low-temperature flue gas and the second low-temperature flue gas are subjected to waste heat recovery in advance before the step (7) is performed.
In some embodiments of the present invention, the domestic garbage is pre-dried by the first low-temperature flue gas and the sludge is pre-dried by the second low-temperature flue gas before the step (7).
In some embodiments of the present invention, the mass ratio of the dry garbage in the step (2) to the dry sludge in the step (4) is (4-12): 1.
in some embodiments of the present invention, in the step (6), 1/3-2/3 of the total volume of the first pyrolysis volatile matter is supplied to the second combustion device for combustion.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a system for coupling domestic garbage and sludge treatment according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a system for coupling domestic garbage and sludge according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a system for coupling domestic garbage and sludge according to another embodiment of the present invention.
Fig. 4 is a flow chart of a method for coupling domestic waste with sludge according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
According to a first aspect of the invention, the invention provides a system for coupling treatment of household garbage and sludge. According to an embodiment of the present invention, as shown in fig. 1, the system includes: the garbage drying device 100, the garbage pyrolysis device 200, the first combustion device 300, the sludge drying device 400, the sludge pyrolysis device 500, the second combustion device 600, and the tail gas purification device 700. The inventor finds that, although the municipal solid waste belongs to the same solid waste, the municipal solid waste and the sludge entering the pyrolysis treatment system have different requirements for external heat due to the difference of the characteristics such as water content, heat value and the like. At present, the treatment mode of municipal sludge is mainly incineration treatment after drying, and the sludge drying process needs to consume a large amount of heat, which often causes that the drying and incineration processes can not realize self-heating balance, and part of coal needs to be added in the sludge to supplement heat. Similarly, the sludge drying pyrolysis treatment process also needs to supplement fuel to ensure normal and stable operation of the process, for example, sludge with water content of 60 wt% after extrusion is used as raw material for drying and pyrolysis treatment, and about 90Nm of additional amount of fuel is needed to supplement per ton of sludge during operation3To ensure drying and pyrolysis are complete. Considering the scale of the pyrolysis treatment process of most domestic garbage and the produced pyrolysis oil and gasThe scale of the surplus is not suitable for additionally matching with a boiler and a steam turbine to supply heat or generate electricity; is not suitable for the operation of mixing garbage and sludge under the condition of large mass ratio change; the invention is also not suitable for providing heat energy for pyrolysis reaction by only using non-condensed steam combustion after oil and gas condensation and separation, and can effectively solve the problem of abundant pyrolysis oil and gas utilization by coupling the garbage pyrolysis with sludge pyrolysis, ensure that the abnormal yield reduction caused by difficult control of pyrolysis temperature in the domestic garbage pyrolysis treatment process is avoided, improve the operation efficiency and reduce the treatment cost of garbage.
The system for coupling domestic garbage and sludge according to the above embodiment of the present invention will be described in detail with reference to fig. 1 to 3.
Garbage pyrolysis unit
According to an embodiment of the present invention, as shown in fig. 1, the garbage pyrolysis unit comprises a garbage drying device 100, a garbage pyrolysis device 200 and a first combustion device 300, wherein the garbage drying device 100 comprises a wet garbage inlet 110, a first medium temperature flue gas inlet 120, a first low temperature flue gas outlet 130 and a dry garbage outlet 140; the garbage pyrolysis device 200 comprises a dry garbage inlet 210, a first high-temperature flue gas inlet 220, a first semicoke outlet 230, a first pyrolysis volatile matter outlet 240 and a first medium-temperature flue gas outlet 250, wherein the first medium-temperature flue gas outlet 250 is connected with the first medium-temperature flue gas inlet 120; the first combustion device 300 is provided with a first gas inlet 310, a first pyrolysis volatile component inlet 320 and a first high-temperature flue gas outlet 330, the first pyrolysis volatile component inlet 320 is connected with the first pyrolysis volatile component outlet 240, the first high-temperature flue gas outlet 330 is connected with the first high-temperature flue gas inlet 220, the first combustion device is suitable for supplying heat for garbage pyrolysis by utilizing pyrolysis oil and gas generated by garbage pyrolysis treatment, and medium-temperature flue gas generated by garbage pyrolysis is used for drying garbage. Therefore, the garbage pyrolysis unit can be used for recycling the household garbage.
According to an embodiment of the present invention, the types of the garbage drying device 100 and the garbage pyrolysis device 200 are not particularly limited, and can be selected by those skilled in the art according to actual needs, for example, the garbage drying device 100 can be a contact type drying device or an indirect type drying device, that is, the medium temperature flue gas can be directly or indirectly contacted with the household garbage to reduce the moisture in the garbage; the garbage pyrolysis apparatus 200 may be a dividing wall type pyrolysis apparatus or a heat accumulating type pyrolysis apparatus, wherein the dividing wall type pyrolysis apparatus may be a dividing wall type pyrolysis apparatus such as a sleeve structure, a tube array structure or a jacket structure.
According to another embodiment of the present invention, as shown in fig. 2, the system for coupling domestic garbage and sludge treatment may further include a garbage crushing device 800, and a discharge port of the garbage crushing device 800 may be connected to the wet garbage inlet 110 via a screw feeder, so that the efficiency and effect of the garbage drying treatment and pyrolysis treatment may be significantly improved.
According to still another embodiment of the present invention, the system for coupling domestic garbage and sludge treatment may further comprise a primary garbage pretreatment device (not shown), wherein the primary garbage pretreatment device comprises a storage device for receiving and storing domestic garbage, a draining device, a sorting device, etc., so that the domestic garbage can be drained, sorted, crushed, dried and pyrolyzed.
According to another embodiment of the invention, when the garbage pyrolysis unit starts to operate, pyrolysis oil and gas generated by garbage pyrolysis are not enough to realize self-heating balance of garbage pyrolysis, and at this time, gas combustion can be matched to supply heat for garbage pyrolysis, and when the garbage pyrolysis can realize self-heating balance, a gas inlet of the first combustion device can be closed, and heat is supplied for garbage pyrolysis only by pyrolysis oil gas generated by garbage pyrolysis.
Sludge pyrolysis unit
According to an embodiment of the present invention, as shown in fig. 1, the sludge pyrolysis unit includes a sludge drying device 400, a sludge pyrolysis device 500, and a second combustion device 600, wherein the sludge drying device 400 includes a wet sludge inlet 410, a second medium temperature flue gas inlet 420, a second low temperature flue gas outlet 430, and a dry sludge outlet 440, and the sludge is dried; the sludge pyrolysis device 500 comprises a dry sludge inlet 510, a second high-temperature flue gas inlet 520, a second semicoke outlet 530, a second pyrolysis volatile matter outlet 540 and a second middle-temperature flue gas outlet 550, wherein the second middle-temperature flue gas outlet 550 is connected with the second middle-temperature flue gas inlet 420; the second combustion device 600 is provided with a second fuel gas inlet 610, a second pyrolysis volatile component inlet 620, a third pyrolysis volatile component inlet 630 and a second high-temperature flue gas outlet 640, the second pyrolysis volatile component inlet 620 is connected with the second pyrolysis volatile component outlet 540, the third pyrolysis volatile component inlet 630 is connected with the first pyrolysis volatile component outlet 240, the second high-temperature flue gas outlet 640 is connected with the second high-temperature flue gas inlet 520, the second combustion device is suitable for supplying heat for sludge pyrolysis by utilizing pyrolysis oil and gas generated by sludge pyrolysis treatment, the pyrolysis oil, gas and/or fuel gas generated by garbage pyrolysis treatment, and the medium-temperature flue gas generated by sludge pyrolysis is used for sludge drying. Therefore, the sludge pyrolysis unit can be used for recycling the sludge.
According to an embodiment of the present invention, the types of the sludge drying device 400 and the sludge pyrolysis device 500 are not particularly limited, and may be selected by those skilled in the art according to actual needs, for example, the sludge drying device 400 may be a contact type drying device or an indirect type drying device, that is, the medium temperature flue gas may be directly or indirectly contacted with the sludge to reduce the moisture in the sludge; the sludge pyrolysis apparatus 500 may be a dividing wall type pyrolysis apparatus or a heat accumulating type pyrolysis apparatus, wherein the dividing wall type pyrolysis apparatus may be a dividing wall type pyrolysis apparatus such as a sleeve structure, a tube array structure or a jacket structure.
According to another embodiment of the present invention, as shown in fig. 2, the system for coupling domestic garbage and sludge may further comprise a sludge concentration device 910 and a sludge crushing device 920, wherein a feeding port of the sludge crushing device 920 is connected to a discharging port of the sludge concentration device 910, and a discharging port of the sludge crushing device 920 is connected to the wet sludge inlet 410. Therefore, the sludge can be concentrated and crushed in advance and then dried and pyrolyzed, and the efficiency and effect of the sludge drying and pyrolyzing treatment can be further improved.
Tail gas purifying device
According to an embodiment of the present invention, the tail gas purification device 700 comprises a tail gas inlet 710 and a purified gas outlet 720, and the tail gas inlet 710 is connected with the first low temperature flue gas outlet 130 and the second low temperature flue gas outlet 430 respectively. Therefore, the pollution of the smoke to the environment can be obviously reduced.
According to an embodiment of the present invention, the system for coupling domestic garbage and sludge treatment may further comprise a cooling device, and the cooling device may be connected to the first and second char outlets 230 and 530, respectively. Preferably, the cooling device can be a spiral cooler and/or a first waste heat boiler, so that the cooling efficiency and/or the waste heat recovery rate of the semicoke can be further improved.
According to an embodiment of the present invention, the system for coupling domestic garbage and sludge treatment may further comprise: the second exhaust heat boiler, the first low temperature exhanst gas outlet 130 and the second low temperature exhanst gas outlet 430 can be respectively connected with the tail gas inlet 710 through the second exhaust heat boiler, and the inventor finds that when the processing scale of the coupling system is relatively large, the waste heat recovery rate can be further improved on the basis of ensuring the operation cost and the economic benefit of the whole system by adopting the arrangement.
According to an embodiment of the present invention, as shown in fig. 3, the system for coupling domestic garbage and sludge treatment may further include: the system comprises a garbage pre-drying device 150 and a sludge pre-drying device 450, wherein a discharge port 151 of the garbage pre-drying device 150 is connected with a wet garbage inlet 110, the garbage pre-drying device 150 is provided with a first preheating air inlet 152 and a first cold air outlet 153, the first preheating air inlet 152 is connected with a first low-temperature flue gas outlet 130, and the first cold air outlet 153 is connected with a tail gas inlet 710; discharge gate 451 of mud predrying apparatus 450 links to each other with wet sludge inlet 410, mud predrying apparatus 450 has second preheating air import 452 and second cold wind export 453, second preheating air import 452 links to each other with second low temperature exhanst gas outlet 430, second cold wind export 453 links to each other with tail gas import 710, can utilize low temperature flue gas to carry out drying process again after predrying domestic waste and mud respectively from this, thereby not only can further improve entire system's waste heat recovery rate, can also further improve efficiency and the effect of carrying out drying and pyrolysis treatment to rubbish and mud.
According to the embodiment of the invention, the system for coupling treatment of the household garbage and the sludge can greatly reduce the pollutionThe operating cost of the pyrolysis treatment process after the drying of the sludge. For example, at present, for some municipal sludge with low calorific value, the water content is 60.0 wt% after being extruded by a plate frame, the treatment of reduction, harmlessness and recycling is realized through the drying and pyrolysis treatment processes, and as the heat of the system cannot be self-sustaining heat balance, about 93.8Nm & lt/EN & gt needs to be supplemented to each ton of sludge3In terms of natural gas 3.6 yuan/Nm3The price is calculated, 337.7 yuan fuel cost is obtained when only one natural gas per ton of sludge pyrolysis treatment cost is obtained, the popularization of the sludge pyrolysis process is seriously influenced, the expense of fuel supplement can be reduced by coupling the household garbage pyrolysis with the sludge pyrolysis, the treatment cost of the whole sludge pyrolysis treatment process only needs the cost of labor and equipment depreciation, the pyrolysis treatment cost per ton of sludge is reduced by more than seventy percent, and the competitiveness of the sludge pyrolysis treatment process is improved.
According to another embodiment of the invention, a part of the pyrolysis oil and gas of the domestic garbage generated by garbage pyrolysis, such as 1/3-2/3 of the total pyrolysis oil and gas generated by the domestic garbage pyrolysis, can be sent into the first combustion device to be combusted to provide heat for garbage pyrolysis, and the other part of the pyrolysis oil and gas can be sent into the second combustion device to be combusted with the oil and gas generated by sludge pyrolysis to provide heat for sludge pyrolysis. The whole system mainly aims at controlling the temperature of the garbage pyrolysis device, if the temperature in the pyrolysis device is kept between 650 ℃ and 700 ℃ all the time, the sludge pyrolysis device mainly absorbs the heat of rich pyrolysis oil and gas from the household garbage pyrolysis device, and the insufficient heat required by the sludge pyrolysis device is supplied after combustion of fuel gas. The whole system realizes the aim of temperature stabilization of the household garbage pyrolysis device by regulating and controlling the distribution ratio of pyrolysis oil and gas produced by the household garbage pyrolysis device to the first combustion device and the second combustion device, and ensures the stable operation of the garbage pyrolysis treatment process; the method takes little or almost no fuel gas as a regulating and controlling means to realize that the heat of abundant domestic garbage pyrolysis oil and gas can be completely absorbed by the sludge pyrolysis device, thereby greatly reducing the treatment cost of the sludge pyrolysis treatment process.
In the invention, the first pyrolysis volatile matter includes all pyrolysis oil and gas produced by pyrolysis of garbage, and the second pyrolysis volatile matter includes all pyrolysis oil and gas produced by pyrolysis of sludge.
In summary, the system for coupling treatment of domestic garbage and sludge according to the above embodiment of the present invention has at least the following advantages: 1. on the premise of coupling the household garbage and the sludge pyrolysis system, the utilization problem of abundant pyrolysis oil, gas and heat of the garbage pyrolysis system is solved, and the problem that the sludge treatment cost is high due to the fact that high-cost fuel needs to be supplemented due to insufficient heat of the sludge pyrolysis system is solved; 2. the problems that the co-treatment processes of conveying, drying, pyrolysis and the like of the materials are difficult to stabilize and operate for a long period, pyrolysis is unstable, the pyrolysis degree is poor, pyrolysis is not uniform and the like due to different characteristics of the household garbage and the sludge can be effectively avoided; 3. this coupled system uses the gas as the means of regulation and control heat distribution, can preferentially guarantee rubbish pyrolysis device temperature and satisfy the design requirement, it is complete to ensure the pyrolysis, the abundant heat of rubbish pyrolysis only partially satisfies or is close to the outer pyrolysis heat demand of all satisfying the desilt pyrolysis self-heating, the heat of not enough part is with the gas as the replenishment, use less or be close to not using the gas, make the gas handle the means of regulation of flexibility as entire system, both guaranteed the complete and steady operation's of rubbish pyrolysis purpose, the reduction of mud pyrolysis process manufacturing cost has been guaranteed again, the dual purpose of mutually benefiting win-win has been played, the difficult problem of popularization of domestic waste pyrolysis processing system and mud pyrolysis processing system has been explained.
According to a second aspect of the invention, the invention provides a method for implementing coupling treatment of domestic garbage and sludge by using the coupling treatment system of domestic garbage and sludge. According to an embodiment of the invention, referring to fig. 4, the method comprises: (1) supplying the household garbage into a garbage drying device for drying treatment so as to obtain dry garbage; (2) supplying the dry garbage to a garbage pyrolysis device to carry out pyrolysis treatment so as to obtain first semicoke and first pyrolysis volatile components; (3) supplying part of the first pyrolysis volatile component to a first combustion device for combustion so as to obtain first high-temperature flue gas, recycling the first high-temperature flue gas to supply heat for pyrolysis treatment in the step (2) so as to obtain first medium-temperature flue gas, recycling the first medium-temperature flue gas to supply heat for drying treatment in the step (1) so as to obtain first low-temperature flue gas; (4) feeding the sludge into a sludge drying device for drying treatment so as to obtain dry sludge; (5) supplying the dry sludge to a sludge pyrolysis device for pyrolysis treatment so as to obtain second semicoke and second pyrolysis volatile matter; (6) supplying the second pyrolysis volatile component, a part of the first pyrolysis volatile component and/or fuel gas to a second combustion device for combustion so as to obtain second high-temperature flue gas, reusing the second high-temperature flue gas in the step (5) for supplying heat for pyrolysis treatment so as to obtain second medium-temperature flue gas, and reusing the second medium-temperature flue gas in the step (4) for supplying heat for drying treatment so as to obtain second low-temperature flue gas; (7) and supplying the first low-temperature flue gas and the second low-temperature flue gas to a tail gas purification device for purification treatment so as to obtain purified flue gas. The method can effectively solve the problem of utilization of abundant pyrolysis oil and gas, ensure that the pyrolysis treatment process of the household garbage does not cause abnormal yield reduction due to difficulty in control of pyrolysis temperature, improve the operation efficiency and reduce the treatment cost of the garbage.
According to a specific embodiment of the present invention, the drying treatment in step (1) and the drying treatment in step (3) may respectively and independently employ contact heat exchange or indirect heat exchange, and the pyrolysis treatment in step (2) and the pyrolysis treatment in step (4) may respectively and independently employ dividing wall type heating or regenerative type heating.
According to still another embodiment of the present invention, the domestic garbage may be crushed in advance before the step (1) is performed, and the sludge may be concentrated and crushed in advance before the step (4) is performed, so that the efficiency and effect of the drying and pyrolysis treatment of the garbage and the sludge may be significantly improved.
According to another specific embodiment of the present invention, the step (2) may further include: the cooling treatment and/or the waste heat recovery treatment are carried out on the first semicoke, and the step (4) may further include: and (3) carrying out cooling treatment and/or waste heat recovery treatment on the second semicoke, thereby further improving the cooling efficiency and/or waste heat recovery rate of the semicoke.
According to another specific embodiment of the present invention, before performing step (7), waste heat recovery is performed on the first low-temperature flue gas and the second low-temperature flue gas in advance, specifically, two ways may be included: the first method is to adopt a waste heat boiler to recover waste heat before the first low-temperature flue gas and the second low-temperature flue gas are purified, and the second method is to pre-dry domestic garbage by using the first low-temperature flue gas and pre-dry sludge by using the second low-temperature flue gas before the step (7). Therefore, the waste heat utilization rate of the whole coupling process can be improved.
According to another embodiment of the invention, the mass ratio of the dry garbage in the step (2) to the dry sludge in the step (4) is (4-12): 1. therefore, self-heating balance of the whole coupling system can be further realized, the garbage pyrolysis treatment system is ensured not to reduce operation load due to excessive abundant heat, and stable operation of the whole coupling system is realized.
According to another embodiment of the invention, in the step (6), 1/3-2/3 of the volume of the first pyrolysis volatile component is supplied to the second combustion device for combustion, and the inventor finds that the calorific value of the garbage is relatively high, and the self-heating balance of the garbage pyrolysis can be met by adopting 1/3-2/3 of the volume of pyrolysis oil and gas generated by garbage pyrolysis, so that the surplus pyrolysis oil and gas are supplied to the second combustion device for combustion to supply heat for sludge pyrolysis, thereby not only effectively solving the problem of abundant pyrolysis oil and gas utilization, ensuring that the abnormal production reduction of the domestic garbage pyrolysis treatment process caused by difficulty in control of pyrolysis temperature can be avoided, but also reducing the operation cost of sludge pyrolysis treatment.
In summary, the method for coupling treatment of domestic garbage and sludge according to the above embodiment of the present invention has at least the following advantages: 1. by performing coupling treatment on the domestic garbage and the sludge pyrolysis, the problems of utilization of abundant pyrolysis oil, gas and heat thereof in the garbage pyrolysis process and high sludge treatment cost caused by the fact that high-cost fuel needs to be supplemented due to insufficient heat in the sludge pyrolysis process are solved; 2. the problems that the co-treatment processes of conveying, drying, pyrolysis and the like of the materials are difficult to stabilize and operate for a long period, pyrolysis is unstable, the pyrolysis degree is poor, pyrolysis is not uniform and the like due to different characteristics of the household garbage and the sludge can be effectively avoided; 3. can regard as the means of regulation and control heat distribution with the gas, it satisfies the design requirement to guarantee preferentially that rubbish pyrolysis temperature, it is complete to ensure the pyrolysis, the abundant heat of rubbish pyrolysis only partially satisfies or is close to the pyrolysis heat needs that all satisfy except that the mud pyrolysis supplies heat, the heat of not enough part is as the replenishment with the gas, use less or be close to not using the gas, make the gas handle the means of regulation of flexibility as entire system, both guaranteed the complete and steady operation's of rubbish pyrolysis purpose, the reduction of mud pyrolysis process manufacturing cost has been guaranteed again, the dual purpose of mutually benefiting win-win has been played, the difficult problem of popularization of domestic waste pyrolysis processing system and mud pyrolysis processing system has been explained. It should be noted that the features and effects described above for the system for coupling domestic garbage and sludge are also applicable to the method for coupling domestic garbage and sludge, and are not described herein again.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
The pyrolysis treatment project of the household garbage with the temperature of 220t/d is shown in table 1, the physical properties of the garbage are shown in table 2, the pyrolysis reaction is carried out at the garbage pyrolysis temperature of 650 ℃, and the yield and the calorific value of products generated by pyrolysis are shown in table 2.
The garbage pyrolysis device has about 1/3 rich pyrolysis oil and gas. In order to solve the problem of abundant pyrolysis oil and gas resources, a 100t/d sludge pyrolysis treatment device is matched to form a household garbage and sludge pyrolysis coupling treatment system. The industrial analysis data of the sludge is shown in table 3.
TABLE 1 physical Properties of garbage
Composition of garbage (wt%) Received base Unit of
Moisture content 25
Ash content 25
Combustible substance 50
C 52
H 7
O 41
High calorific value 2634 kcal/kg
Lower calorific value 2305 kcal/kg
TABLE 2 yield and calorific value of pyrolysis products of garbage
Yield of Heat value
Biochar (semicoke) 35.00％ 2033.446(kcal/kg)
Pyrolysis oil 14.25％ 7336.25(kcal/kg)
Pyrolysis gas 15.00％ 4461.239(kcal/Nm3)
Steam of water 35.75％ 0
TABLE 3 Industrial analysis data of the sludge
Total water content Mt 83.16
Dry basis ash ASH 51.46
Volatile matter of dry base VM 41.37
Dry base fixed carbon FC 7.17
2/3 of all pyrolysis oil and gas produced by the garbage pyrolysis device is sent into the first combustion device to be combusted to provide heat for garbage pyrolysis, and the other part of 1/3 is sent into the second combustion device to be combusted with the oil and gas produced by sludge pyrolysis to provide heat for sludge pyrolysis. The system mainly aims at controlling the temperature of the garbage pyrolysis device to be 650 ℃, the sludge pyrolysis device completely consumes the heat of rich pyrolysis oil and gas from the household garbage pyrolysis device, and the insufficient heat required by the sludge pyrolysis device is supplied by burning natural gas. Through the system, the problem of utilization of abundant pyrolysis oil and gas can be effectively solved, abnormal yield reduction caused by difficulty in control of pyrolysis temperature in the domestic garbage pyrolysis treatment process is avoided, the operation efficiency is improved, and the treatment cost of garbage is reduced. About 93.8Nm needs to be supplemented for each ton of sludge3To ensure complete pyrolysis of the sludge, at a natural gas level of 3.6 yuan/Nm3The price is calculated, the cost of the fuel of 337.7 yuan is obtained when only one natural gas per ton of sludge pyrolysis treatment is used, and the thermal decoupling with the household garbage is adoptedAfter the method is combined, the cost of fuel supplement is reduced, the treatment cost of the whole sludge pyrolysis treatment process only needs the cost of labor and equipment depreciation, the pyrolysis treatment cost of per ton of sludge is reduced by more than seventy percent, and the competitiveness of the sludge pyrolysis treatment process is improved.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the present invention, unless otherwise expressly specified or limited, the terms "connected" and the like are to be construed broadly, e.g., as meaning fixedly attached, detachably attached, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A system for coupling treatment of household garbage and sludge is characterized by comprising:
the garbage drying device comprises a wet garbage inlet, a first medium-temperature flue gas inlet, a first low-temperature flue gas outlet and a dry garbage outlet;
the garbage pyrolysis device comprises a dry garbage inlet, a first high-temperature flue gas inlet, a first semicoke outlet, a first pyrolysis volatile component outlet and a first medium-temperature flue gas outlet, and the first medium-temperature flue gas outlet is connected with the first medium-temperature flue gas inlet;
the first combustion device is provided with a first gas inlet, a first pyrolysis volatile component inlet and a first high-temperature flue gas outlet, the first pyrolysis volatile component inlet is connected with the first pyrolysis volatile component outlet, and the first high-temperature flue gas outlet is connected with the first high-temperature flue gas inlet;
the sludge drying device comprises a wet sludge inlet, a second medium-temperature flue gas inlet, a second low-temperature flue gas outlet and a dry sludge outlet;
the sludge pyrolysis device comprises a dry sludge inlet, a second high-temperature flue gas inlet, a second semicoke outlet, a second pyrolysis volatile component outlet and a second medium-temperature flue gas outlet, and the second medium-temperature flue gas outlet is connected with the second medium-temperature flue gas inlet;
the second combustion device is provided with a second fuel gas inlet, a second pyrolysis volatile component inlet, a third pyrolysis volatile component inlet and a second high-temperature flue gas outlet, the second pyrolysis volatile component inlet is connected with the second pyrolysis volatile component outlet, the third pyrolysis volatile component inlet is connected with the first pyrolysis volatile component outlet, and the second high-temperature flue gas outlet is connected with the second high-temperature flue gas inlet;
tail gas cleanup unit, tail gas cleanup unit includes tail gas import and purified gas outlet, the tail gas import respectively with first low temperature exhanst gas outlet with second low temperature exhanst gas outlet links to each other.
2. The system of claim 1, wherein the waste drying device and the sludge drying device are each independently a contact drying device or an indirect drying device, and the waste pyrolysis device and the sludge pyrolysis device are each independently a dividing wall pyrolysis device or a regenerative pyrolysis device.
3. The system of claim 1 or 2, further comprising: and a discharge port of the garbage crushing device is connected with the wet garbage inlet through a screw feeder.
4. The system of claim 3, further comprising: the sludge crushing device comprises a sludge concentration device and a sludge crushing device, wherein a feed inlet of the sludge crushing device is connected with a discharge outlet of the sludge concentration device, and a discharge outlet of the sludge crushing device is connected with a wet sludge inlet.
5. The system of claim 1 or 4, further comprising: and the cooling device is respectively connected with the first semicoke outlet and the second semicoke outlet.
6. The system according to claim 5, characterized in that the cooling device is a screw cooler and/or a first waste heat boiler.
7. The system of claim 1 or 6, further comprising: and the first low-temperature flue gas outlet and the second low-temperature flue gas outlet are respectively connected with the tail gas inlet through the second waste heat boiler.
8. The system of claim 1 or 6, further comprising:
the discharge port of the garbage pre-drying device is connected with the wet garbage inlet, the garbage pre-drying device is provided with a first preheating air inlet and a first cold air outlet, the first preheating air inlet is connected with the first low-temperature flue gas outlet, and the first cold air outlet is connected with the tail gas inlet;
the sludge pre-drying device is provided with a discharge hole connected with the wet sludge inlet, the sludge pre-drying device is provided with a second preheating air inlet and a second cold air outlet, the second preheating air inlet is connected with the second low-temperature flue gas outlet, and the second cold air outlet is connected with the tail gas inlet.
9. A method for implementing coupling treatment of household garbage and sludge by using the system of any one of claims 1-8, which is characterized by comprising the following steps:
(1) supplying the domestic garbage into the garbage drying device for drying treatment so as to obtain dry garbage;
(2) feeding the dry waste into the waste pyrolysis device for pyrolysis treatment so as to obtain first semicoke and first pyrolysis volatile matter;
(3) supplying a part of the first pyrolysis volatile component to the first combustion device for combustion so as to obtain first high-temperature flue gas, reusing the first high-temperature flue gas in the step (2) for supplying heat for the pyrolysis treatment so as to obtain first medium-temperature flue gas, and reusing the first medium-temperature flue gas in the step (1) for supplying heat for the drying treatment so as to obtain first low-temperature flue gas;
(4) feeding the sludge into the sludge drying device for drying treatment so as to obtain dry sludge;
(5) feeding the dry sludge into a sludge pyrolysis device for pyrolysis treatment so as to obtain second semicoke and second pyrolysis volatile matter;
(6) supplying the second pyrolysis volatile component, a part of the first pyrolysis volatile component and/or fuel gas to the second combustion device for combustion so as to obtain second high-temperature flue gas, reusing the second high-temperature flue gas in the step (5) for supplying heat for the pyrolysis treatment so as to obtain second medium-temperature flue gas, and reusing the second medium-temperature flue gas in the step (4) for supplying heat for the drying treatment so as to obtain second low-temperature flue gas;
(7) and supplying the first low-temperature flue gas and the second low-temperature flue gas to the tail gas purification device for purification treatment so as to obtain purified flue gas.
10. The method according to claim 9, wherein the drying treatment in step (1) and the drying treatment in step (3) are independently conducted by contact heat exchange or indirect heat exchange, the pyrolysis treatment in step (2) and the pyrolysis treatment in step (4) are independently conducted by dividing wall heating or regenerative heating,
optionally, the domestic garbage is subjected to crushing treatment in advance before the step (1) is carried out, and the sludge is subjected to concentration treatment and crushing treatment in advance before the step (4) is carried out;
optionally, step (2) further comprises: cooling and/or waste heat recovery treatment is carried out on the first semicoke, and the step (4) further comprises the following steps: cooling and/or waste heat recovery treatment is carried out on the second semicoke;
optionally, before the step (7), performing waste heat recovery on the first low-temperature flue gas and the second low-temperature flue gas in advance;
optionally, the domestic garbage is pre-dried by the first low-temperature flue gas in advance before the step (7), and the sludge is pre-dried by the second low-temperature flue gas;
optionally, the mass ratio of the dry garbage in the step (2) to the dry sludge in the step (4) is (4-12): 1;
optionally, in the step (6), 1/3-2/3 of the volume of the first pyrolysis volatile matter is supplied to the second combustion device for combustion.
CN201911378134.6A 2019-12-27 2019-12-27 System and method for coupling treatment of household garbage and sludge Pending CN110966609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911378134.6A CN110966609A (en) 2019-12-27 2019-12-27 System and method for coupling treatment of household garbage and sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911378134.6A CN110966609A (en) 2019-12-27 2019-12-27 System and method for coupling treatment of household garbage and sludge

Publications (1)

Publication Number Publication Date
CN110966609A true CN110966609A (en) 2020-04-07

Family

ID=70037152

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911378134.6A Pending CN110966609A (en) 2019-12-27 2019-12-27 System and method for coupling treatment of household garbage and sludge

Country Status (1)

Country Link
CN (1) CN110966609A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111778055A (en) * 2020-06-02 2020-10-16 北京云水浩瑞环境科技有限公司 Organic solid waste pyrolysis system and pyrolysis method
CN111853800A (en) * 2020-06-30 2020-10-30 中国科学院广州能源研究所 Heat accumulation type miniaturized domestic garbage heat treatment system
CN112013638A (en) * 2020-07-30 2020-12-01 国网山东省电力公司电力科学研究院 Garbage drying system and method utilizing flue gas waste heat
CN112592726A (en) * 2020-12-25 2021-04-02 喻万钧 System and method for co-processing sludge and waste tires
CN113503544A (en) * 2021-07-02 2021-10-15 沈阳航空航天大学 Waste reduction treatment system for household garbage and livestock manure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111778055A (en) * 2020-06-02 2020-10-16 北京云水浩瑞环境科技有限公司 Organic solid waste pyrolysis system and pyrolysis method
CN111778055B (en) * 2020-06-02 2024-03-15 北京云水浩瑞环境科技有限公司 Organic solid waste pyrolysis system and pyrolysis method
CN111853800A (en) * 2020-06-30 2020-10-30 中国科学院广州能源研究所 Heat accumulation type miniaturized domestic garbage heat treatment system
CN112013638A (en) * 2020-07-30 2020-12-01 国网山东省电力公司电力科学研究院 Garbage drying system and method utilizing flue gas waste heat
CN112592726A (en) * 2020-12-25 2021-04-02 喻万钧 System and method for co-processing sludge and waste tires
CN113503544A (en) * 2021-07-02 2021-10-15 沈阳航空航天大学 Waste reduction treatment system for household garbage and livestock manure
CN113503544B (en) * 2021-07-02 2024-06-11 沈阳航空航天大学 Waste reduction treatment system for household garbage and livestock manure

Similar Documents

Publication Publication Date Title
CN110966609A (en) System and method for coupling treatment of household garbage and sludge
CN103740389B (en) The multi-production process of low-rank coal cascade utilization
CN104176897A (en) Environment-friendly and energy-saving sludge high-temperature carbonization system
CN207483591U (en) The compound pyrolysis system of a kind of sludge, greasy filth
CN102604656A (en) Heat-storage type biomass pyrolysis method and system
CN102633419A (en) Sludge pyrolysis treatment process by taking waste plastic as supplementary energy
CN215975660U (en) Rotary kiln pyrolysis system
CN102250633A (en) Method for improving quality of brown coal with externally heated rotary furnace
CN102732274A (en) Brown coal dry-distillation method using coal hot air furnace to supply heat
CN102183135B (en) Two-stage drying and gasification integrated device and method of organic matter
CN101531910A (en) System for rapidly pyrolysing and liquefying biomass
CN204079738U (en) A kind of environmental protection, energy-saving sludge high temperature cabonization system
CN106085511A (en) A kind of rubbish charcoal resource and the method and system of raising pyrolysis gas calorific value
CN101871649A (en) System for pyrolyzing and burning sludge at low temperature
CN201852110U (en) Sludge low-temperature themolysis incineration system
CN107098559A (en) A kind of oily sludge is from heat supply Non-oxygen pyrolytic equipment and its method for pyrolysis
CN102994127A (en) Low-rank coal multi-stage fluidized bed coal chemical industry multiple production system and method
CN205710623U (en) A kind of system realizing rubbish charcoal resource
CN211625265U (en) System for coupling treatment of household garbage and sludge
CN207756595U (en) A kind of electricity generation system of debirs clean utilization
CN201746507U (en) Self-energy-supply sludge pyrolysis and charring treatment system
CN102732275A (en) Lignite dry distillation device using fire coal hot air furnace as heat supply
CN101974351A (en) Scale fixed bed biomass gasification power generation production technology and complete equipment
CN105157033A (en) System and method for pyrolyzing and treating garbage
CN205664385U (en) Organic matter self -power is dry to divide resource system with pyrolysis, complete set

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination