CN111637467A - Energy-saving process and system for recovering solid waste incineration treatment energy - Google Patents

Energy-saving process and system for recovering solid waste incineration treatment energy Download PDF

Info

Publication number
CN111637467A
CN111637467A CN202010565523.6A CN202010565523A CN111637467A CN 111637467 A CN111637467 A CN 111637467A CN 202010565523 A CN202010565523 A CN 202010565523A CN 111637467 A CN111637467 A CN 111637467A
Authority
CN
China
Prior art keywords
flue gas
heat exchange
energy
incineration
exchange device
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
CN202010565523.6A
Other languages
Chinese (zh)
Inventor
娈锋尝
殷波
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.)
Wuxi Xuelang Environmental Technology Co Ltd
Original Assignee
Wuxi Xuelang 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 Wuxi Xuelang Environmental Technology Co Ltd filed Critical Wuxi Xuelang Environmental Technology Co Ltd
Priority to CN202010565523.6A priority Critical patent/CN111637467A/en
Publication of CN111637467A publication Critical patent/CN111637467A/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
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • 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
    • F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
    • 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
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Supply (AREA)

Abstract

The invention provides an energy-saving process for recovering solid waste incineration treatment energy, which can greatly reduce the energy consumed in a solid waste treatment process, is simple in process and easy to popularize. Meanwhile, the invention also discloses a system for realizing the energy recovery and energy saving process of solid waste incineration treatment. In the technical scheme of the invention, two heat exchange procedures are arranged, the heat of the high-temperature incineration tail gas is utilized, and a specific cooling procedure is not needed, so that the procedures are simplified, and the cooling procedure is prevented from consuming energy again; in the first heat exchange process, the air is heated by taking the solid waste incineration tail gas as a heat source, the heated air is divided into two paths, one path of air is taken as combustion-supporting air and is input into the incineration chamber, the energy consumption of the incineration chamber for heating the combustion-supporting air is reduced, the other path of heated air is taken as the heat source of the second heat exchange process, the purified flue gas is heated, the flue gas is not required to be heated by using another heat source, and the energy consumption of the tail gas treatment process is greatly reduced.

Description

Energy-saving process and system for recovering solid waste incineration treatment energy
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to an energy-recycling and energy-saving process and system for solid waste incineration treatment.
Background
The solid waste (hereinafter, referred to as solid waste) refers to solid waste and garbage of solid and semi-solid waste substances generated in production, consumption, life and other activities of human beings, and the hazardous waste refers to solid waste with hazardous characteristics listed in national hazardous waste lists or identified according to national hazardous waste identification standards and methods. Solid wastes, particularly dangerous wastes, need to be subjected to incineration treatment in the treatment process; in order to ensure the complete incineration of pollutants in the incineration treatment process, a large amount of fuel needs to be supplemented to heat the flue gas to nearly 1100 ℃; in order to ensure that the combustion is sufficient and the oxygen content in the burned flue gas is more than 6 percent in the burning treatment process, a large amount of cold air is blown into a burning system for supporting combustion; then, in the process of treating the high-temperature tail gas, the temperature is reduced through a quenching process, so that the generation of pollutants such as dioxin is reduced; therefore, the energy consumption and waste of the system are serious in the whole process of incineration treatment; in addition, because a wet process is often used to remove pollutants such as acid gases in flue gas in the flue gas purification process, the temperature of the flue gas is reduced to about 70 ℃, such a flue gas temperature is not suitable for selective catalytic denitration in the subsequent process, and on the other hand, if the flue gas is directly discharged into the atmosphere, the subsequent equipment is corroded at low temperature and white smoke is generated in the tail gas discharged into the atmosphere, additional processes are needed to be added to solve the problem, and a large amount of energy is still needed to be consumed.
Disclosure of Invention
In order to solve the problem of serious energy consumption in the existing solid waste treatment process, the invention provides an energy recovery and energy saving process for solid waste incineration treatment, which can greatly reduce the energy consumed in the solid waste treatment process, and has the advantages of simple process and easy popularization. Meanwhile, the invention also discloses a system for realizing the energy recovery and energy saving process of solid waste incineration treatment.
The technical scheme of the invention is as follows: an energy-saving process for recovering solid waste incineration treatment energy, which comprises the following steps:
s1: putting the waste into an incineration chamber for incineration; decomposing the incineration waste into incineration tail gas and slag at high temperature, wherein the slag is collected from an ash hopper at the bottom of the incineration chamber;
it is characterized by also comprising the following steps:
s2: burning tail gas discharged by the burning chamber enters a first heat exchange device and is used as a heat source to heat air to be heated in the first heat exchange device;
s3: the heat-exchanged flue gas discharged from the first heat exchange device is discharged into a flue gas purification system to be subjected to flue gas purification in a flue gas purification process;
s4: the flue gas purified by the flue gas purification system is input into a second heat exchange device for heating;
s5: the air heated by the first heat exchange device is divided into two paths:
the first path of heated air is input into the incineration chamber and is used as combustion-supporting gas for subsequent solid waste incineration;
the second path is used as a heat source of the second heat exchange device to heat the purified flue gas input to the second heat exchange device by the flue gas purification system;
s6: and inputting the heated purified flue gas into a subsequent tail gas treatment process for treatment.
It is further characterized in that:
in step S2, the temperature of the flue gas after heat exchange by the first heat exchange device is reduced to about 500 ℃;
in step S3, in the flue gas purification process, a wet process is used to remove pollutants from the flue gas.
Realize an economizer system of solid useless incineration disposal energy recovery energy-saving technology, it includes: the incineration chamber is characterized in that: an incineration tail gas outlet of the incineration chamber is connected with a flue gas inlet of a first heat exchange device, and a flue gas outlet of the first heat exchange device is connected with a gas inlet of a flue gas purification system; the gas outlet of the flue gas purification system is connected with a purified gas inlet of the second heat exchange device; the first heat exchange device comprises an air inlet, a first heated air outlet and a second heated air outlet, the air inlet is connected with an air inlet device, the first heated air outlet is connected with a combustion-supporting air inlet of the incineration chamber, and the second heated air outlet is connected with a heated air inlet of the second heat exchange device.
It is further characterized in that:
the first heat exchange device and the second heat exchange device are realized based on a flue gas-air heat exchanger.
The energy-saving process for recovering the solid waste incineration treatment energy is provided with two heat exchange procedures, utilizes the heat of the high-temperature incineration tail gas, does not need to be provided with a specific cooling procedure, simplifies the procedures, and avoids the cooling procedure from consuming energy again; in the first heat exchange process, the air is heated by taking the solid waste incineration tail gas as a heat source, the heated air is divided into two paths, one path is taken as combustion-supporting air and is input into the incineration chamber, the energy consumption of the incineration chamber for heating the combustion-supporting air is reduced, the other path of heated air is taken as a heat source of the second heat exchange process, the purified flue gas is heated, and the flue gas is not required to be heated by using another heat source, so that the energy consumption of the tail gas treatment process is greatly reduced; according to the technical scheme, based on two heat exchange procedures, the heat of the incineration tail gas of the solid waste is fully utilized, the overall energy consumption of the incineration treatment of the solid waste is greatly saved, the overall procedure is simple, and the method is very suitable for popularization and use.
Drawings
Fig. 1 is a schematic structural diagram of an energy saving system according to the present invention.
Detailed Description
As shown in fig. 1, in the energy-saving system for realizing the energy-saving process for recovering solid waste incineration treatment energy, normal temperature air enters an incineration chamber 1 through an environment-friendly air inlet 6, an incineration tail gas outlet 7 of the incineration chamber 1 is connected with a flue gas inlet 8 of a first heat exchange device 2, and a flue gas outlet 12 of the first heat exchange device 2 is connected with an air inlet 13 of a flue gas purification system 3; the gas outlet 14 of the flue gas purification system 3 is connected with the purified gas inlet 15 of the second heat exchange device 4; the first heat exchange device 2 comprises an air inlet (not shown in the figure), a first heated air outlet 10 and a second heated air outlet 11, the air inlet is connected with an air inlet device (not shown in the figure), the first heated air outlet 10 is connected with a combustion-supporting air inlet 18 of the incineration chamber 1, the second heated air outlet 11 is connected with a heated air inlet 17 of the second heat exchange device 4, and the heated tail gas is taken as a heat source and is conveyed to the second heat exchange device 4 through equipment such as a fan 5; first heat transfer device 2, second heat transfer device 4 realize based on flue gas air heat exchanger, and heat transfer device based on flue gas air heat exchanger realizes heats through indirect heating's mode, can not carry out secondary pollution to being heated gas, promptly: the purification process is not required to be specially added for the heated gas, and the whole process is not more complicated while the heat exchange is realized.
The energy-saving process for recovering solid waste incineration treatment energy comprises the following steps in detail.
S1: putting the waste into an incineration chamber 1 for incineration; the incineration waste is decomposed into incineration tail gas and slag at high temperature, the slag is collected from an ash hopper 9 at the bottom of the incineration chamber 1, and the incineration tail gas is discharged from an incineration tail gas outlet 7 of the incineration chamber 1; the combustion treatment technology of the solid waste in the incineration chamber 1 is controlled by adopting the existing solid waste combustion control technology, such as: 3T + E incineration condition control technology (four incineration control parameter technologies, namely incineration temperature, stirring and mixing degree, gas retention time and excess air rate) realizes thorough decomposition of pollutants such as dioxin and the like.
S2: the incineration tail gas with the temperature up to 1100 ℃ after incineration is discharged from an incineration tail gas outlet 7, enters the first heat exchange device 2 and is used as a heat source for heating air to be heated in the first heat exchange device 2; the temperature of the flue gas after heat exchange by the first heat exchange device 2 is reduced to about 500 ℃; part of ash in the flue gas is settled to an ash hopper at the bottom of the first heat exchange device 2 and is discharged through sealed ash conveying equipment.
S3: the heat-exchanged flue gas discharged from the first heat exchange device 2 is discharged into a flue gas purification system 3 to be subjected to flue gas purification in a flue gas purification process; in the smoke purification process, a wet process is adopted to remove pollutants in smoke.
S4: the flue gas purified by the flue gas purification system 3 is input into the second heat exchange device 4 for heating.
S5: the air heated by the first heat exchange device 2 is divided into two paths:
the first path of heated air is input into the incineration chamber 1 and is used as combustion-supporting gas for subsequent solid waste incineration for supporting combustion and supplementing air; because the temperature of the heated air in the first path is far higher than the ambient temperature, the additional input of heat energy for ensuring the incineration temperature in the combustion chamber is greatly reduced;
the second path is used as a heat source of the second heat exchange device 4 to heat the purified flue gas input to the second heat exchange device 4 by the flue gas purification system 3; the temperature of the purified flue gas after heating is adapted to the temperature of the subsequent process unit, an additional heating heat source is not needed, the energy consumption of the whole system is further reduced, the heating mode of the second heat exchange device 4 realized based on the flue gas air heat exchanger is indirect heating, the purified flue gas cannot be polluted again, and the subsequent tail gas treatment process is simplified.
S6: the heated and purified flue gas is input into a subsequent tail gas treatment process for treatment through an exhaust port 16 of the second heat exchange device 4;
the cooling gas after heat exchange is discharged into the subsequent tail gas treatment process through a cooling gas exhaust port 19.

Claims (5)

1. An energy-saving process for recovering solid waste incineration treatment energy, which comprises the following steps:
s1: putting the waste into an incineration chamber for incineration; decomposing the incineration waste into incineration tail gas and slag at high temperature, wherein the slag is collected from an ash hopper at the bottom of the incineration chamber;
it is characterized by also comprising the following steps:
s2: burning tail gas discharged by the burning chamber enters a first heat exchange device and is used as a heat source to heat air to be heated in the first heat exchange device;
s3: the heat-exchanged flue gas discharged from the first heat exchange device is discharged into a flue gas purification system to be subjected to flue gas purification in a flue gas purification process;
s4: the flue gas purified by the flue gas purification system is input into a second heat exchange device for heating;
s5: the air heated by the first heat exchange device is divided into two paths:
the first path of heated air is input into the incineration chamber and is used as combustion-supporting gas for subsequent solid waste incineration;
the second path is used as a heat source of the second heat exchange device to heat the purified flue gas input to the second heat exchange device by the flue gas purification system;
s6: and inputting the heated purified flue gas into a subsequent tail gas treatment process for treatment.
2. The energy-saving process for recovering energy by incinerating solid wastes according to claim 1, characterized in that: in step S2, the temperature of the flue gas after heat exchange by the first heat exchange device is reduced to about 500 ℃.
3. The energy-saving process for recovering energy by incinerating solid wastes according to claim 1, characterized in that: in step S3, in the flue gas purification process, a wet process is used to remove pollutants from the flue gas.
4. The energy-saving system for realizing the energy-saving process for recovering solid waste incineration disposal energy of claim 1 comprises: the incineration chamber is characterized in that: an incineration tail gas outlet of the incineration chamber is connected with a flue gas inlet of a first heat exchange device, and a flue gas outlet of the first heat exchange device is connected with a gas inlet of a flue gas purification system; the gas outlet of the flue gas purification system is connected with a purified gas inlet of the second heat exchange device; the first heat exchange device comprises an air inlet, a first heated air outlet and a second heated air outlet, the air inlet is connected with an air inlet device, the first heated air outlet is connected with a combustion-supporting air inlet of the incineration chamber, and the second heated air outlet is connected with a heated air inlet of the second heat exchange device.
5. The energy-saving system for recovering and recycling energy of solid waste incineration disposal according to claim 4, wherein: the first heat exchange device and the second heat exchange device are realized based on a flue gas-air heat exchanger.
CN202010565523.6A 2020-06-19 2020-06-19 Energy-saving process and system for recovering solid waste incineration treatment energy Pending CN111637467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010565523.6A CN111637467A (en) 2020-06-19 2020-06-19 Energy-saving process and system for recovering solid waste incineration treatment energy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010565523.6A CN111637467A (en) 2020-06-19 2020-06-19 Energy-saving process and system for recovering solid waste incineration treatment energy

Publications (1)

Publication Number Publication Date
CN111637467A true CN111637467A (en) 2020-09-08

Family

ID=72331790

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010565523.6A Pending CN111637467A (en) 2020-06-19 2020-06-19 Energy-saving process and system for recovering solid waste incineration treatment energy

Country Status (1)

Country Link
CN (1) CN111637467A (en)

Similar Documents

Publication Publication Date Title
CN101837365B (en) Integrated method and system of active carbon regeneration and hazardous waste incineration
CN111333290A (en) Cu-containing industrial sludge hazardous waste recycling treatment system and treatment method thereof
CN108278615A (en) A kind of processing system and method for garbage incinerating power plant zero-emission
CN115654914A (en) Cement production method by utilizing alternative fuel oxy-fuel combustion coupled with carbon capture
CN201669263U (en) Activated carbon regeneration and hazardous waste incineration integrated device
CN212025143U (en) Contain Cu industrial sludge danger useless resourceful treatment system
CN112062435A (en) Oil sludge pyrolysis treatment device and process thereof
CN212691789U (en) Energy recovery and energy saving system for solid waste incineration treatment
CN218532258U (en) Thermal desorption system for fly ash dioxin
CN111637467A (en) Energy-saving process and system for recovering solid waste incineration treatment energy
CN214791158U (en) Useless processing system of fluorine-containing danger
CN106807188A (en) A kind of waste gas treatment process
CN211260812U (en) Garbage harmless treatment production line in high-altitude low-oxygen area
CN115582405A (en) Method and system for thermal desorption and detoxification of household garbage incineration fly ash
CN211847828U (en) System for treating tail gas containing acetylene carbide slag in process of producing acetylene by calcium carbide dry method
CN111396902A (en) Process for treating wet desulphurization regeneration tail gas by using tube furnace
CN116951998B (en) Kiln with VOCs waste gas catalytic combustion processing system
CN110940196A (en) Electric furnace flue gas waste heat utilization system and method
CN212841617U (en) Ultralow discharging equipment of sludge drying incineration tail gas
CN210267237U (en) Simple and easy combustible waste and waste salt coprocessing device
CN220417360U (en) Tail gas purifying treatment system of distributed household garbage pyrolysis furnace
CN213513912U (en) Useless and VOCs waste gas concurrent processing system of danger
CN214345605U (en) A safe processing apparatus for high concentration waste gas
CN109668155A (en) The method of high temperature incineration method processing cycle gas decarbonization tail gas
CN216977554U (en) Incineration type flue gas purification system

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
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 214000 no.2020 Lihu Avenue, Binhu District, Wuxi City, Jiangsu Province

Applicant after: WUXI XUELANG ENVIRONMENTAL TECHNOLOGY Co.,Ltd.

Address before: 214128, Wuxi, Jiangsu province Binhu District Taihu Street double new economic Park

Applicant before: WUXI XUELANG ENVIRONMENTAL TECHNOLOGY Co.,Ltd.