CN113217923A - Independent sludge treatment system - Google Patents

Independent sludge treatment system Download PDF

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Publication number
CN113217923A
CN113217923A CN202110576863.3A CN202110576863A CN113217923A CN 113217923 A CN113217923 A CN 113217923A CN 202110576863 A CN202110576863 A CN 202110576863A CN 113217923 A CN113217923 A CN 113217923A
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China
Prior art keywords
flue gas
incinerator
air
sludge
sand
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CN202110576863.3A
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Chinese (zh)
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刘沪滨
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Individual
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Priority to CN202110576863.3A priority Critical patent/CN113217923A/en
Publication of CN113217923A publication Critical patent/CN113217923A/en
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    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • 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
    • 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
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • 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
    • F23J15/006—Layout of treatment plant
    • 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
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/101—Baghouse type
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Combustion & Propulsion (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a sludge separate treatment system, which comprises a feeding system, an incineration system, a flue gas purification system and a discharge system, wherein the municipal sludge with certain water content is effectively treated, and the sludge can be stably combusted without adding auxiliary fuel such as coal and the like through a small amount of heat value in the sludge and enough heat capacity in an incinerator; the flue gas can be subjected to deacidification, dust removal and dehumidification through the flue gas purification system, so that the flue gas is colorless and transparent, reaches the national emission standard, realizes the maximum reduction of municipal sludge, and avoids the pollution to the environment; the quartz sand can be recycled, so that the treatment cost is effectively reduced; the heat energy generated by burning is fully utilized; the whole system has the advantages of simple structure, reasonable configuration, stable operation, low investment and operation cost, controllable pollution discharge index, outstanding volume reduction effect, good environmental protection effect and obvious benefit.

Description

Independent sludge treatment system
Technical Field
The invention relates to the technical field of sludge incineration treatment, in particular to a sludge separate treatment system.
Background
With the rapid development of economy in China, a large number of sewage treatment plants are built and put into operation, and the quantity of municipal sludge generated by the sewage treatment plants is increased sharply. In view of the potential environmental risks, especially the threat to human health, the treatment of municipal sludge has become one of the major environmental problems facing China.
The single incineration method is one of the recommended methods for municipal sludge treatment, can effectively decompose toxic and harmful substances in the municipal sludge, can greatly reduce the volume and the quality of the waste, does not need to add auxiliary fuel such as coal, does not need to depend on other waste disposal plants for construction or mix the sludge into other disposal facilities for treatment, is beneficial to site selection of the sludge incineration plant and independent operation without external influence, and effectively realizes reduction to the final safe disposal which is the target. A smooth, efficient and simple independent treatment system is one of the main factors for realizing the effective and economic operation of municipal sludge.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the independent sludge treatment system, so that the municipal sludge can be effectively treated to reach the standard, the facility is simple, the operation is convenient, and the investment and operation cost is low.
The technical scheme provided by the invention is as follows:
the utility model provides a mud single treatment system, includes pan feeding system, burns system, gas cleaning system and discharge system, wherein:
the feeding system is used for feeding the sludge into the incineration system;
the incineration system is used for incinerating sludge to form flue gas; the incineration system comprises an incinerator, a sand circulation and sand adding system and an air heating device, wherein: the incinerator has an internal circulation function and is used for mixing and incinerating sludge, quartz sand and primary air; the sand circulating and sand adding system is used for adding quartz sand and circulating sand into the incinerator and screening a mixture discharged from the incinerator into slag and circulating sand; the air heater is used for cooling the flue gas and heating the air to be used as primary air and secondary hot air;
the flue gas purification system is used for purifying the flue gas generated by the incineration system, separating pollutants and moisture, and enabling the flue gas discharged by the flue gas to reach the emission standard; flue gas purification system is including sharp quenching neutralization tower, sack cleaner, deacidification cooling tower and the reheater that connects gradually, wherein: the quenching and neutralizing tower is used for spraying alkaline substances and separating acid gas in the flue gas; the bag-type dust collector is used for separating dust in the flue gas; the deacidification cooling tower is used for adjusting the temperature of the flue gas and further deacidifying the flue gas, so that water vapor carried in the flue gas is changed into a liquid state and is further separated from the flue gas; the reheater heats the flue gas by utilizing the reheated hot air;
and the discharge system is used for discharging the flue gas purified by the flue gas purification system into the atmosphere.
Preferably, the incinerator is provided with a sludge inlet, a flue gas outlet, a quartz sand inlet, a primary air inlet and a mixture outlet, wherein: the sludge inlet is arranged at the upper part of the incinerator and is communicated with the feeding system; the flue gas outlet is arranged at the upper part of the incinerator and is communicated with the air heater; the quartz sand inlet is arranged on the side wall of the incinerator and is communicated with the sand circulating and sand adding system; the primary air inlet is arranged at the lower part of the incinerator and is communicated with the air heater;
preferably, the inner bottom wall of the incinerator is in a circular arc shape, and a mixture outlet is arranged on one side of the circular arc shape and is communicated with the sand circulating and adding system.
Preferably, the incinerator is a bubbling fluidized bed incinerator, and the section of the middle part of the incinerator is gradually enlarged from bottom to top.
Preferably, when the temperature of the flue gas is reduced to below 200 ℃ in the air heater, the flue gas enters a flue gas purification system; the air is heated in the air heater and then divided into two paths, wherein one path of air is sent into the incinerator as primary air, and the other path of air is sent into the reheater as reheated air, and the primary air and the reheated air are respectively used for sludge incineration and low-temperature flue gas heating.
Preferably, the air heater is embodied as an air-to-air heat exchanger.
Preferably, the deacidification cooling tower is used for reducing the temperature of the flue gas subjected to dust removal by the bag-type dust remover to below 85 ℃, and the reheater is used for heating the flue gas subjected to dehumidification by the deacidification cooling tower to above 130 ℃.
Preferably, an activated carbon injection device is arranged in front of an inlet of the bag-type dust collector and used for injecting activated carbon powder into the flue.
Preferably, the exhaust system comprises an induced draft fan and a chimney, wherein: the induced draft fan is used for providing draft for the flue gas and maintaining the flow power of the flue gas; the chimney is used for discharging the flue gas reaching the emission standard into the atmosphere.
The invention has the beneficial effects that:
the independent sludge treatment system provided by the invention can effectively treat municipal sludge with certain water content, can realize stable combustion of the sludge through a small amount of heat value carried by the sludge and enough heat capacity contained in the incinerator, and does not need to add auxiliary fuel such as coal and the like; the flue gas can be subjected to deacidification, dust removal (heavy metal and dioxin removal) and dehumidification through a flue gas purification system, so that the flue gas is colorless and transparent, reaches the national emission standard, realizes the maximum reduction of municipal sludge, and avoids the pollution to the environment; the used quartz sand can be recycled, so that the treatment cost is effectively reduced; the heat energy generated by burning is fully utilized; the whole system has the advantages of simple structure, reasonable configuration, stable operation, low investment and operation cost, controllable pollution discharge index, outstanding volume reduction effect, good environmental protection effect and obvious benefit.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a sludge separate treatment system provided by the present invention;
in the attached figure, 1-a feeding system, 2-an incinerator, 21-a sludge inlet, 22-a flue gas outlet, 23-a quartz sand inlet, 24-a primary air inlet, 25-a mixture outlet, 3-a sand circulating and sand adding system, 4-an air heater, 5-a quenching and neutralizing tower, 6-a bag-type dust remover, 7-a deacidification and cooling tower, 8-a reheater, 9-an induced draft fan and 10-a chimney.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The embodiment provides a sludge separate treatment system, as shown in fig. 1, including a feeding system 1, an incineration system, a flue gas purification system and a discharge system, wherein:
feeding system
The feeding system 1 is used for feeding sludge into an incinerator 2 of the incineration system, and a screw conveyor can be specifically used for conveying the sludge;
second, burn system
The incineration system is used for incinerating the sludge to form flue gas;
the incineration system comprises an incinerator 2, a sand circulation and sand adding system 3 and an air heating device, wherein:
the incinerator 2 has an internal circulation function and is used for mixing and incinerating sludge, quartz sand and primary air; in the present embodiment, the incinerator 2 is provided with a sludge inlet 21, a flue gas outlet 22, a quartz sand inlet 23, a primary air inlet 24, and a mixture outlet 25, specifically: the sludge inlet 21 is arranged at the upper part of the incinerator 2 and is communicated with the discharge hole of the screw conveyer of the feeding system 1; the flue gas outlet 22 is arranged at the upper part of the incinerator 2 and is communicated with the air inlet of the air heater 4; the quartz sand inlet 23 is arranged on the side wall of the incinerator 2 and communicated with the sand circulating and adding system 3; the primary air inlet 24 is arranged at the lower part of the incinerator 2 and communicated with the air heater 4; the inner bottom wall of the incinerator 2 is arc-shaped, and a mixture outlet 25 is arranged on one side of the arc and is communicated with the sand circulating and adding system 3; the incinerator 2 is a bubbling fluidized bed incinerator 2, and the section of the middle part of the incinerator 2 is gradually enlarged from bottom to top;
in this embodiment, stable combustion of the sludge can be achieved without adding auxiliary fuel such as coal, by virtue of a small amount of heat value carried by the sludge itself and a sufficiently large heat capacity contained in the incinerator 2; quartz sand mixed with sludge is in a boiling state at the bottom of the incinerator 2, severe heat transfer and mass transfer processes occur, violent hearth radiation heat is received, materials consisting of the quartz sand and the sludge are continuously turned over up and down, the speed of small-particle materials generated by incineration is reduced along with the increase of the inner section of the incinerator 2 in the rising process of smoke, the small-particle materials are further converted into a descending state, internal circulation of the materials is formed, most of the materials stay in the incinerator due to the internal circulation function of the incinerator 2, the materials with overlarge quality fall at the bottom of the incinerator 2, and the materials are discharged into the sand circulation and sand adding system 3 because the inner bottom wall of the incinerator 2 is arc-shaped;
the sand circulating and sand adding system 3 is used for adding quartz sand and circulating sand into the incinerator 2 and screening the mixture discharged from the incinerator 2 into slag and circulating sand; it should be noted that the screened fine material is discharged as slag and sent to a slag transport vehicle for disposal, and the coarse material is sent as circulating sand and new quartz sand to the incinerator 2 again through the quartz sand inlet 23 as a heat carrier;
the air heater 4 is used for cooling the flue gas and heating the air to be used as primary air and secondary hot air; specifically, the air heater 4 heats the air fed by the blower through the high-temperature flue gas discharged from the incinerator 2, and then feeds the heated air into the incinerator 2 as primary air and into the reheater 8 as reheated air; it should be noted that, when the temperature of the flue gas is reduced to below 200 ℃ in the air heater 4, the flue gas enters the flue gas purification system; the air heater 4 is an air-air heat exchanger, in practical application, the air heater 4 can be structurally one device, or can be composed of 2 or 3 devices, and the purpose is to realize the function of air heating;
third, flue gas purification system
The flue gas purification system is used for purifying the flue gas generated by the incineration system, separating pollutants and moisture, and enabling the flue gas discharged by the flue gas to reach a colorless and transparent discharge standard;
flue gas purification system is including sharp quenching neutralization tower 5, sack cleaner 6, deacidification cooling tower 7 and the reheater 8 that connects gradually, wherein:
the quenching and neutralizing tower 5 is used for spraying alkaline substances and separating acid gases such as SO2 and the like from the flue gas;
the bag-type dust collector 6 is used for separating dust in the flue gas; an active carbon injection device can be arranged in front of an inlet of the bag-type dust collector 6 and is used for injecting active carbon powder into the flue, the active carbon powder moves towards the bag-type dust collector 6 along with flue gas in the flue and is finally blocked outside the bag to form an active carbon layer which can be used for adsorbing heavy metal and dioxin in the flue gas and further optimizing the flue gas filtering effect;
the deacidification cooling tower 7 is used for adjusting the temperature of the flue gas, so that the water vapor carried in the flue gas is changed into liquid, and then the liquid is separated from the flue gas; in the embodiment, the deacidification cooling tower 7 can preferably cool the temperature of the flue gas dedusted by the bag-type dust remover 6 to 85 ℃;
the reheater 8 heats the flue gas with the reheated air; in the embodiment, the reheater 8 is used for heating the flue gas dehumidified by the deacidification cooling tower 7 to 130 ℃;
in this embodiment, the flue gas cooled by the air heater 4 enters the flue gas purification system, and first enters the quenching and neutralizing tower 5, and the acidic gas such as SO entrained in the flue gas2The flue gas and the alkali liquor sprayed in the quenching and neutralizing tower 5 generate chemical reaction to form particles, the particles are separated from the flue gas and fall into the bottom of the quenching and neutralizing tower 5, and the flue gas is primarily purified; then part of small particle reaction substance is carried by the flue gas and leaves the quenching and neutralizing tower 5 together, enters the bag-type dust remover 6, an active carbon injection device is arranged between the quenching and neutralizing tower 5 and the bag-type dust remover 6, and various particles carried in the flue gasDue to the filtering action of the cloth bag, the smoke is blocked and separated, so that ultra-clean smoke is formed, and the requirements of national relevant emission standards are met; meanwhile, due to the characteristic that municipal sludge contains a large amount of moisture, the moisture is also completely in the flue gas, therefore, the flue gas passing through the bag-type dust remover 6 enters the deacidification cooling tower 7, the temperature of the flue gas is reduced to below 85 ℃, the moisture in the flue gas is also changed from a gas state to a liquid state, and the flue gas is separated by the deacidification cooling tower 7; finally, the dehumidified flue gas flows through a reheater 8, is heated to above 130 ℃ by hot air and then enters an exhaust system;
four, discharge system
The discharge system is used for discharging the flue gas purified by the flue gas purification system into the atmosphere;
in this embodiment, the exhaust system comprises an induced draft fan 9 and a stack 10, wherein: the induced draft fan 9 is used for providing draft for the flue gas and maintaining the flow power of the flue gas; the stack 10 is used to discharge flue gases that meet emission standards into the atmosphere.
In summary, in the sludge separate treatment system provided in this embodiment, firstly, municipal sludge with medium water content generated by a sewage treatment plant is sent to the incinerator 2 through the feeding system 1, and is rapidly and fully mixed with high-temperature quartz sand and primary air, and the drying, firing, burning and burnout processes are rapidly completed, the burned solid mixture can be screened into slag for separate treatment and recycling of circulating sand, high-temperature flue gas generated after burning enters the air heater 4 for heating air, the heated air can be respectively sent to the incinerator 2 as primary air and sent to the reheater 8 as reheat air, the flue gas after cooling enters the flue gas purification system, and is subjected to acid removal, dust removal (removing heavy metals and dioxin) and dehumidification in sequence to reach the national standard requirements, and is discharged into the atmosphere through the induced draft fan 9 and the chimney 10, thereby avoiding pollution to the environment.
The embodiment does not need to add auxiliary fuel such as coal again at the in-process of handling mud, and the throughput is strong, and the system is simple, and the configuration is reasonable, can handle to harmless state with having certain water content municipal sludge, and the operation is stable, investment and working costs are low, and the pollutant discharge index is controllable, the volume reduction effect is outstanding, environmental protection is effectual, and the benefit is obvious.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (9)

1. A sludge separate treatment system is characterized in that: including pan feeding system, burning system, gas cleaning system and discharge system, wherein:
the feeding system is used for feeding the sludge into the incineration system;
the incineration system is used for incinerating sludge to form flue gas; the incineration system comprises an incinerator, a sand circulation and sand adding system and an air heating device, wherein: the incinerator has an internal circulation function and is used for mixing and incinerating sludge, quartz sand and primary air; the sand circulating and sand adding system is used for adding new quartz sand and circulating sand into the incinerator and screening a mixture discharged from the incinerator into slag and circulating sand; the air heater is used for cooling the flue gas and heating the air to be used as primary air and secondary hot air;
the flue gas purification system is used for purifying the flue gas generated by the incineration system, separating pollutants and moisture, and enabling the flue gas discharged by the flue gas to reach the emission standard; flue gas purification system is including sharp quenching neutralization tower, sack cleaner, deacidification cooling tower and the reheater that connects gradually, wherein: the quenching and neutralizing tower is used for spraying alkaline substances and separating acid gas in the flue gas; the bag-type dust collector is used for separating dust in the flue gas; the deacidification cooling tower is used for adjusting the temperature of the flue gas and further deacidifying the flue gas, so that water vapor carried in the flue gas is changed into a liquid state and is further separated from the flue gas; the reheater heats the flue gas by utilizing the reheated hot air;
and the discharge system is used for discharging the flue gas purified by the flue gas purification system into the atmosphere.
2. The system for separately treating sludge according to claim 1, wherein:
be equipped with mud entry, exhanst gas outlet, quartz sand entry, primary air entry and mixture export on the burning furnace, wherein: the sludge inlet is arranged at the upper part of the incinerator and is communicated with the feeding system; the flue gas outlet is arranged at the upper part of the incinerator and is communicated with the air heater; the quartz sand inlet is arranged on the side wall of the incinerator and is communicated with the sand circulating and sand adding system; the primary air inlet is arranged at the lower part of the incinerator and is communicated with the air heater.
3. The system for separately treating sludge according to claim 2, wherein: the inner bottom wall of the incinerator is arc-shaped, and a mixture outlet is formed in one side of the arc shape and is communicated with a sand circulating and adding system.
4. The system for individually treating sludge according to claim 3, wherein: the incinerator is a bubbling fluidized bed incinerator, and the section of the middle part of the incinerator is gradually enlarged from bottom to top.
5. The system for separately treating sludge according to claim 1, wherein: when the temperature of the flue gas is reduced to below 200 ℃ in the air heater, the flue gas enters a flue gas purification system; the air is heated in the air heater and then divided into two paths, wherein one path of air is sent into the incinerator as primary air, and the other path of air is sent into the reheater as reheated air, and the primary air and the reheated air are respectively used for sludge incineration and low-temperature flue gas heating.
6. The system for separately treating sludge according to claim 5, wherein: the air heater is specifically a gas-gas heat exchanger.
7. The system for separately treating sludge according to claim 1, wherein: the deacidification cooling tower is used for reducing the temperature of the flue gas subjected to dust removal by the bag-type dust remover to below 85 ℃, and the reheater is used for heating the flue gas subjected to dehumidification by the deacidification cooling tower to above 130 ℃.
8. The system for separately treating sludge according to claim 7, wherein: and an active carbon injection device is arranged in front of an inlet of the bag-type dust collector and is used for injecting active carbon powder into the flue.
9. A system for individually treating sludge according to any one of claims 1 to 8, wherein: the discharge system includes draught fan and chimney, wherein: the induced draft fan is used for providing draft for the flue gas and maintaining the flow power of the flue gas; the chimney is used for discharging the flue gas reaching the emission standard into the atmosphere.
CN202110576863.3A 2021-05-26 2021-05-26 Independent sludge treatment system Withdrawn CN113217923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110576863.3A CN113217923A (en) 2021-05-26 2021-05-26 Independent sludge treatment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110576863.3A CN113217923A (en) 2021-05-26 2021-05-26 Independent sludge treatment system

Publications (1)

Publication Number Publication Date
CN113217923A true CN113217923A (en) 2021-08-06

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Application Number Title Priority Date Filing Date
CN202110576863.3A Withdrawn CN113217923A (en) 2021-05-26 2021-05-26 Independent sludge treatment system

Country Status (1)

Country Link
CN (1) CN113217923A (en)

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