CN112178647B - Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion - Google Patents

Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion Download PDF

Info

Publication number
CN112178647B
CN112178647B CN202010876647.6A CN202010876647A CN112178647B CN 112178647 B CN112178647 B CN 112178647B CN 202010876647 A CN202010876647 A CN 202010876647A CN 112178647 B CN112178647 B CN 112178647B
Authority
CN
China
Prior art keywords
oxygen
combustion
heat exchanger
solid waste
organic solid
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.)
Active
Application number
CN202010876647.6A
Other languages
Chinese (zh)
Other versions
CN112178647A (en
Inventor
余***
张长波
马晓宇
张小沁
商照聪
倪晓芳
陈励科
李云峰
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.)
Shanghai Institute Of Chemical Engineering Environmental Engineering Co ltd
Shanghai Research Institute of Chemical Industry SRICI
Original Assignee
Shanghai Institute Of Chemical Engineering Environmental Engineering Co ltd
Shanghai Research Institute of Chemical Industry SRICI
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 Shanghai Institute Of Chemical Engineering Environmental Engineering Co ltd, Shanghai Research Institute of Chemical Industry SRICI filed Critical Shanghai Institute Of Chemical Engineering Environmental Engineering Co ltd
Priority to CN202010876647.6A priority Critical patent/CN112178647B/en
Publication of CN112178647A publication Critical patent/CN112178647A/en
Application granted granted Critical
Publication of CN112178647B publication Critical patent/CN112178647B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/50—Control or safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/10—Drying by heat
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/30—Oxidant supply
    • 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)
  • Air Supply (AREA)

Abstract

The invention relates to a process device and a method for treating organic solid waste by energy-saving and environment-friendly pulse oxygen-enriched combustion. Compared with the prior art, the pulse oxygen enrichment device indirectly provides oxygen enrichment for pulses, ensures that equipment is not excessively oxidized to cause overload high temperature of a system, simultaneously ensures that organic matters and oxygen are fully oxidized to release heat, and the generated tail gas heat is fully utilized after heat exchange, so that gas and materials entering a combustion furnace are heated, the combustion time of the organic matters in the furnace is shortened, and the combustion treatment efficiency of the system is improved.

Description

Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion
Technical Field
The invention belongs to the technical field of organic solid waste treatment, and relates to a process device and a method for treating organic solid waste by energy-saving and environment-friendly pulse oxygen-enriched combustion.
Background
The rapid development of the industry is mainly based on the use of fossil fuels. However, fossil fuel resources are gradually exhausted, and the excessive use thereof also causes environmental pollution, resulting in the increasing decline of quality of life of human beings. The development of renewable energy sources becomes the focus of research in various countries. At present, hydrogen is generated by water electrolysis, and because of the advantages of zero emission, zero pollution and the like in the production process, more and more hydrogen is used, but the reasonable and efficient use of byproduct oxygen generated in the electrolysis process becomes a difficult point. The combustion of organic solid wastes in environment-friendly products needs a large amount of oxygen to improve the oxidation degree of the organic matters and achieve the purpose of reducing pollutant emission, so that the combination of the byproduct oxygen generated in the water electrolysis process and the organic matter combustion treatment is very necessary.
The common combustion methods at present include an air combustion method, a combustion method of adding oxygen only and the like, but the methods have the problems of poor combustion sufficiency, serious waste of oxygen and the like.
Chinese patent 201810935439.1 provides an oxygen-enriched combustion furnace and a using method thereof, and the oxygen-enriched combustion furnace comprises a furnace body, a feeding door and other parts, wherein a steel lining water jacket is added to achieve the purpose of preheating and recycling. The mixing proportion of oxygen and natural gas can be automatically adjusted according to the flame intensity inside the furnace body, so that the natural gas can be fully combusted to release heat energy, the fuel utilization rate is improved, meanwhile, the loss of the furnace body can be reduced, the service life of the furnace body is prolonged, and the like. But the service life of the combustion furnace matched with the method is short.
Chinese patent 201810860742.X provides an environment-friendly combustion furnace, wherein a combustion furnace is arranged in a combustion furnace body, a natural gas inlet is arranged at the lower part of the combustion furnace body, a vent hole is arranged at the left side of the upper part of the combustion furnace body, a vent pipe is arranged on the vent hole, the vent pipe penetrates through the combustion furnace body and extends into the combustion furnace, a blower is arranged on the vent pipe, and a waste gas treatment device is arranged at the middle section in an induced draft pipe.
Disclosure of Invention
The invention aims to provide an energy-saving and environment-friendly process device and a method for treating organic solid wastes through pulse oxygen-enriched combustion, so that oxygen is saved and utilized, the oxidizing combustion is ensured to be complete, a furnace body is protected from being overheated, the high-temperature load of the furnace body is reduced, and the service life of a combustion furnace is prolonged.
The purpose of the invention can be realized by the following technical scheme:
one of the technical schemes of the invention provides an energy-saving and environment-friendly process device for treating organic solid waste by pulse oxygen-enriched combustion, which comprises a combustion furnace, an air supply assembly, an oxygen supply assembly, a cyclone separator, a first heat exchanger and a tail gas treatment assembly, wherein the air supply assembly, the oxygen supply assembly and an organic solid waste source are respectively connected with an air inlet, an oxygen inlet and an organic solid waste inlet on the combustion furnace through an air supply pipeline, an oxygen supply pipeline and a solid waste conveying belt, a tail gas outlet on the combustion furnace is also sequentially connected with the cyclone separator, the first heat exchanger and the tail gas treatment assembly, three preheating branches are led out from a hot fluid outlet on the first heat exchanger, and air sent into the air inlet through the air supply pipeline, oxygen sent into the oxygen inlet through the oxygen supply pipeline and organic solid waste sent into the organic solid waste inlet through the solid waste conveying belt are respectively preheated or dried.
Furthermore, a second heat exchanger, a third heat exchanger and a fourth heat exchanger are respectively arranged on the air supply pipeline, the oxygen supply pipeline and the solid waste conveying belt, and the second heat exchanger, the third heat exchanger and the fourth heat exchanger are respectively connected with three preheating branches led out from a hot fluid outlet of the first heat exchanger.
Furthermore, three preheating branches are respectively provided with a flow meter and a control valve which are independently controlled.
Further, the air supply assembly is a fan, and the oxygen supply assembly is an oxygen storage bin.
Further, the third heat exchanger is an energy storage type heat exchanger, and the fourth heat exchanger is a belt dryer. The belt dryer receives heat sent from the first heat exchanger through the preheating branch, the wet and cold organic solid waste sent into the belt dryer is heated and dried, and hot steam obtained after treatment is converted into condensed water to be discharged after the heat is absorbed by the fifth heat exchanger.
Furthermore, hot fluid discharged from the three preheating branches is returned to the first heat exchanger through the circulating pumps respectively.
Furthermore, an auxiliary material inlet is also arranged on the combustion furnace.
Furthermore, admittedly useless feed inlet department is provided with back taper type distributor, and back taper type distributor is made for temperature resistant metal material and divides the multilayer to distribute in the feed inlet below, and every layer of back taper type distributor is arranged into circularly, arranges for the staggered arrangement between the upper and lower layer distributor. The inverted cone type distributor has a length × width × height range of (5 cm-100 cm) × (5 cm-100 cm) × (5 cm-100 cm).
Furthermore, air disperser and oxygen disperser have also been arranged respectively to air inlet and oxygen import department, and corresponding air disperser and oxygen disperser are the multitube structure (constitute by the gas distribution pipe of a plurality of different orientations promptly), set up porous structure at the gas outlet of each gas distribution pipe to furthest disperses gas. Preferably, tens to hundreds of holes are uniformly distributed on the side wall of each gas distribution pipe, and the diameter of each hole is in the range of 2mm-5 cm.
Further, the tail gas treatment component may be a tail gas treatment device commonly used in the art, and is used for removing sulfur oxides and/or nitrogen oxides, etc. which may be present in the tail gas.
The second technical scheme of the invention provides a process method for treating organic solid waste by energy-saving and environment-friendly pulse oxygen-enriched combustion, which is implemented by adopting the process device for treating organic solid waste by energy-saving and environment-friendly pulse oxygen-enriched combustion and comprises the following steps:
(1) Opening an air supply device, introducing air into the combustion furnace, closing an oxygen inlet of the combustion furnace, opening a tail gas outlet, adding combustion-supporting materials into the combustion furnace, and simultaneously conveying the organic solid waste into the combustion furnace through a solid waste conveying belt to perform combustion treatment on the organic solid waste;
(2) In the process of treating organic solid waste by combustion in a combustion furnace, after air is introduced for a period of time, closing an air inlet and an air supply device, opening an oxygen supply device and an oxygen inlet, starting pulse oxygen-enriched combustion operation, after the air inlet time of oxygen is controlled within a set time range, closing the oxygen inlet and the oxygen supply device, switching to air to enter the combustion furnace, and circulating the steps;
(3) The solid ash slag burnt in the combustion furnace is discharged, the tail gas generated by combustion is discharged after heat exchange in the first heat exchanger and then is treated by the tail gas treatment assembly, hot fluid obtained by collecting the waste heat of the tail gas in the first heat exchanger is subjected to heat exchange treatment on air, oxygen and organic solid waste entering the combustion furnace through three preheating branches, and obtained cold fluid is returned to the first heat exchanger.
Further, in the step (2), the time for introducing air into the combustion furnace each time is 5-60min.
Further, in the step (2), the time for introducing oxygen into the combustion furnace each time is 1-30min.
Compared with the prior art, the invention has the following advantages:
(1) The invention does not use oxygen alone in specific application, can combine cheaper air and oxygen for use, and intermittently introduces the air and the oxygen into the combustion furnace, thereby reducing the use amount of single oxygen, lowering the use cost, reducing the high-temperature load of the furnace body and prolonging the service life of the combustion furnace while protecting the furnace body from overheating combustion.
(2) In the specific use of the invention, the two burners are operated intermittently and are respectively combusted with air and oxygen, thereby reducing the damage of the burners caused by continuous use, prolonging the service life of the burners and reducing the occurrence of faults of key parts of the combustion furnace.
(3) The invention recovers the heat in the high-temperature tail gas, is used for heating the gas and the materials entering the combustion furnace, and improves the production efficiency of the system while improving the utilization rate of the heat.
Drawings
FIG. 1 is a schematic flow diagram of a process of the present invention;
FIG. 2 is a schematic view of an inverted cone distributor of the present invention;
FIG. 3 is a schematic view of a gas distribution tube of the present invention;
the notation in the figure is:
the method comprises the following steps of 1-combustion furnace, 2-blower, 3-oxygen storage bin, 4-cyclone separator, 5-first heat exchanger, 6-tail gas treatment component, 7-second heat exchanger, 8-third heat exchanger, 9-fourth heat exchanger, 10-circulating pump and 11-fifth heat exchanger.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following embodiments or examples, functional components or structures that are not specifically described are all conventional components or structures in the art for achieving the corresponding functions.
The invention provides an energy-saving environment-friendly process device for treating organic solid waste by pulse oxygen-enriched combustion, which is structurally shown in figure 1 and comprises a combustion furnace 1, an air supply assembly, an oxygen supply assembly, a cyclone separator 4, a first heat exchanger 5 and a tail gas treatment assembly 6, wherein the air supply assembly, the oxygen supply assembly and an organic solid waste source are respectively connected with an air inlet, an oxygen inlet and an organic solid waste inlet on the combustion furnace 1 through an air supply pipeline, an oxygen supply pipeline and a solid waste conveying belt, the tail gas outlet on the combustion furnace 1 is also sequentially connected with the cyclone separator 4, the first heat exchanger 5 and the tail gas treatment assembly 6, three preheating branches are led out from a hot fluid outlet on the first heat exchanger 5, and air sent into the air inlet through the air supply pipeline, oxygen sent into the oxygen inlet through the oxygen supply pipeline and organic solid waste sent into the organic solid waste inlet through the solid waste conveying belt are respectively preheated or dried.
In a specific embodiment of the invention, the air supply pipeline, the oxygen supply pipeline and the solid waste conveyor belt are respectively provided with a second heat exchanger 7, a third heat exchanger 8 and a fourth heat exchanger 9, and the second heat exchanger 7, the third heat exchanger 8 and the fourth heat exchanger 9 are respectively connected with three preheating branches led out from a hot fluid outlet of the first heat exchanger 5.
Furthermore, three preheating branches are respectively provided with a flow meter and a control valve which are independently controlled.
In a specific embodiment of the present invention, the air supply assembly is a blower 2, and the oxygen supply assembly is an oxygen storage bin 3.
In a specific embodiment of the present invention, the third heat exchanger 8 is an energy storage heat exchanger, and the fourth heat exchanger 9 is a belt dryer. The belt dryer receives the heat from the first heat exchanger 5 through the preheating branch, the wet and cold organic solid waste sent into the belt dryer is heated and dried, and the hot steam obtained after treatment is converted into condensed water to be discharged after the heat is absorbed by the fifth heat exchanger 11.
In a particular embodiment of the invention, the hot fluid discharged from the three preheating branches is also returned to the first heat exchanger 5 by means of a circulation pump 10, respectively.
In a specific embodiment of the present invention, the combustion furnace 1 is further provided with an auxiliary material inlet.
In a specific embodiment of the invention, the solid waste feed inlet is provided with inverted cone-shaped distributors, the shapes of which are shown in fig. 2, the inverted cone-shaped distributors are made of temperature-resistant metal materials and distributed below the feed inlet in multiple layers, each layer of the inverted cone-shaped distributors are arranged in a circle, and the upper and lower layers of distributors are arranged in a staggered manner. The inverted cone distributor has a length × width × height range of (5 cm-100 cm) × (5 cm-100 cm) × (5 cm-100 cm).
In a specific embodiment of the present invention, an air disperser and an oxygen disperser are also disposed at the air inlet and the oxygen inlet, respectively, and both the corresponding air disperser and the corresponding oxygen disperser have a multi-tube structure (i.e. are composed of a plurality of gas distribution tubes with different orientations), and a porous structure is disposed at the gas outlet of each gas distribution tube, as shown in fig. 3, so as to disperse the gas to the maximum extent. Preferably, tens to hundreds of holes are uniformly distributed on the side wall of each gas distribution pipe, and the diameter of each hole is in the range of 2mm-5 cm.
In one embodiment of the present invention, the tail gas treatment assembly 6 may be a tail gas treatment device commonly used in the art, and is used for removing sulfur oxides and/or nitrogen oxides, etc. which may be present in the tail gas.
The invention also provides a process method for treating organic solid waste by energy-saving environment-friendly pulse oxygen-enriched combustion, which is implemented by adopting the process device for treating organic solid waste by energy-saving environment-friendly pulse oxygen-enriched combustion and comprises the following steps:
(1) Opening an air supply device, introducing air into the combustion furnace 1, closing an oxygen inlet of the combustion furnace 1, opening a tail gas outlet, adding combustion-supporting materials into the combustion furnace 1, and simultaneously conveying organic solid wastes into the combustion furnace 1 through a solid waste conveying belt to perform combustion treatment on the organic solid wastes;
(2) In the process of combustion treatment of organic solid waste in the combustion furnace 1, after air is introduced for a period of time, closing an air inlet and an air supply device, opening an oxygen supply device and an oxygen inlet, starting pulse oxygen-enriched combustion operation, after the air inlet time of the oxygen is controlled within a set time range, closing the oxygen inlet and the oxygen supply device, switching to air to enter the combustion furnace 1, and circulating the steps;
(3) The burned solid ash in the combustion furnace 1 is discharged, the tail gas generated by combustion is discharged after heat exchange in the first heat exchanger 5 and then treated by the tail gas treatment assembly 6, the hot fluid obtained by collecting the waste heat of the tail gas by the first heat exchanger 5 is subjected to heat exchange treatment on the air, the oxygen and the organic solid waste entering the combustion furnace 1 through three preheating branches, and the obtained cold fluid returns to the first heat exchanger 5.
Further, in the step (2), the time for introducing air into the combustion furnace 1 each time is 5-60min.
Further, in the step (2), the time for introducing oxygen into the combustion furnace 1 each time is 1-30min.
The invention relates to a process device and a method for treating organic solid waste by using energy-saving environment-friendly pulse oxygen-enriched combustion, which are characterized in that pure oxygen is quantitatively sprayed in a certain interval according to the shape of materials entering a furnace and the temperature condition of the furnace by using a byproduct oxygen of hydrogen prepared by electrolyzing water, the pulse high pressure disturbs the materials in the furnace, the processes of heat transfer and mass transfer are accelerated, and the like, the materials are fully oxidized after obtaining excessive oxygen in the combustion, organic carbon releases heat in the process of converting the organic carbon into carbon dioxide, the heat is brought out by tail gas, and the heat of the tail gas can be divided into three parts for utilization after passing through a heat exchanger: the first part is used for heating air entering the furnace, the second part is used for heating oxygen which discontinuously enters the furnace body through the energy storage type heat exchanger (namely, the third heat exchanger 8), the third part is used for heating materials through the closed belt dryer (namely, the fourth heat exchanger 9), and the materials enter the furnace body after being dehydrated and heated. Compared with the prior art, the pulse oxygen enrichment device indirectly provides oxygen enrichment for pulses, ensures that the device does not generate excessive oxidation to cause ultrahigh temperature and overtemperature of the system, simultaneously ensures that organic matters and oxygen which is a byproduct of hydrogen production from cheap electrolyzed water are fully oxidized to release heat, and the generated tail gas heat is fully utilized after heat exchange, so that gas and materials entering the combustion furnace 1 are heated, the combustion time of the organic matters is reduced, and the combustion treatment efficiency of the system is improved.
Because the traditional furnace body mostly adopts a method of blowing air to supply oxygen for combustion during combustion, the local oxygen supply quantity is often insufficient due to uneven distribution of oxygen, and a certain amount of organic matters are remained in the substances after combustion, and the combustion is incomplete. Although some novel furnace bodies adopt oxygen to directly supply oxygen, because oxygen is used singly, excessive oxygen easily causes the waste of oxygen when the temperature of the furnace body is too high, and the waste of oxygen resources is caused when the service life of the furnace body is influenced. The oxygen used by the invention is derived from the byproduct oxygen of hydrogen generated by electrolyzing water, and the price is relatively low. In the specific operation, the preheating treatment is well carried out on the materials entering the furnace body by utilizing the preheating generated by the high-temperature tail gas, the method for intermittently providing pure oxygen also ensures that the temperature of the furnace body is not too high, and simultaneously, the consumption of oxygen is reduced, and the waste of resources is reduced. And the common organic solid wastes in the environmental protection field are taken as the treatment target, so as to achieve the purposes of fully using the existing cheap resources and ensuring the long-term stable operation of the furnace body.
The above embodiments may be implemented individually, or in any combination of two or more.
The above embodiments will be described in more detail with reference to specific examples.
Example 1:
the embodiment provides an energy-saving environment-friendly type pulse oxygen-enriched combustion process device for treating organic solid waste, the structure of which is shown in figure 1, and the device comprises a combustion furnace 1, an air supply assembly, an oxygen supply assembly, a cyclone separator 4, a first heat exchanger 5 and a tail gas treatment assembly 6, wherein the air supply assembly, the oxygen supply assembly and an organic solid waste source are respectively connected with an air inlet, an oxygen inlet and an organic solid waste inlet on the combustion furnace 1 through an air supply pipeline, an oxygen supply pipeline and a solid waste conveying belt, the tail gas outlet on the combustion furnace 1 is also sequentially connected with the cyclone separator 4, the first heat exchanger 5 and the tail gas treatment assembly 6, three preheating branches are led out from a hot fluid outlet on the first heat exchanger 5, and the three preheating branches are respectively used for preheating or drying air fed into the air inlet through the air supply pipeline, oxygen fed into the oxygen inlet through the oxygen supply pipeline and organic solid waste fed into the organic solid waste inlet through the solid waste conveying belt.
Referring to fig. 1 again, the air supply pipeline, the oxygen supply pipeline and the solid waste conveyor belt are respectively provided with a second heat exchanger 7, a third heat exchanger 8 and a fourth heat exchanger 9, and the second heat exchanger 7, the third heat exchanger 8 and the fourth heat exchanger 9 are respectively connected with three preheating branches led out from a hot fluid outlet of the first heat exchanger 5.
Referring to fig. 1 again, the air supply line, the oxygen supply line, and the three preheating branches are respectively provided with an independently controlled flow meter and a control valve.
In this embodiment, the air supply assembly is a blower 2, and the oxygen supply assembly is an oxygen storage bin 3.
The third heat exchanger 8 is an energy storage type heat exchanger, and the fourth heat exchanger 9 is a belt dryer. The belt dryer receives heat sent from the first heat exchanger 5 through the preheating branch, the wet and cold organic solid waste sent into the belt dryer is heated and dried, and hot steam obtained after treatment is converted into condensed water to be discharged after the heat is absorbed by the fifth heat exchanger 11. The hot fluid exiting from the three preheating branches is also returned to the first heat exchanger 5 by means of the circulation pumps 10, respectively. The combustion furnace 1 is also provided with an auxiliary material inlet.
In this embodiment, the back taper distributor that sets up in burning furnace 1 adopts temperature resistant metal material to make, and it divides the multilayer to distribute in solid useless feed inlet below, and every layer of back taper distributor is arranged into circularly, arranges for the staggered arrangement between the upper and lower layer distributor. The inverted cone distributor length x width x height range is 5cm x 5cm.
Air disperser and oxygen disperser have also been arranged respectively in air inlet and oxygen import department, and corresponding air disperser and oxygen disperser are the multitube structure (constitute by the gas distribution pipe of a plurality of different orientations promptly), set up porous structure at the gas outlet of each gas distribution pipe, as shown in fig. 3 to furthest disperses gas. The side wall of each gas distribution pipe is also uniformly distributed with 10 holes, and the diameter of each hole is 5mm.
The tail gas treatment component 6 may be a tail gas treatment device commonly used in the art, and is used for removing sulfur oxides and/or nitrogen oxides, etc. which may exist in the tail gas.
The production is carried out by the system, and the effective volume is 2m 3 The combustion furnace 1 performs a combustion test on the tank bottom oil sludge with the organic matter content of 90% and detects the combustion effect, and specifically comprises the following steps:
(1) Opening an air supply device, introducing air into the combustion furnace 1, closing an oxygen inlet of the combustion furnace 1, opening a tail gas outlet, adding a combustion-supporting material into the combustion furnace 1 through an auxiliary material inlet, and simultaneously, conveying the organic solid waste into the combustion furnace 1 through a solid waste conveying belt to perform combustion treatment on the organic solid waste;
(2) In the process of combustion treatment of organic solid waste in the combustion furnace 1, after air is introduced for 30min, closing an air inlet and an air supply device, opening an oxygen supply device and an oxygen inlet, starting pulse oxygen-enriched combustion operation, after controlling the air inlet time of oxygen for 5min, closing the oxygen inlet and the oxygen supply device, switching to air to enter the combustion furnace 1, and circulating the steps;
(3) The burned solid ash in the combustion furnace 1 is discharged, dust is removed from the tail gas generated by combustion at the cyclone separator 4, then the tail gas is sent to the first heat exchanger 5 for heat exchange, and then the tail gas is treated by the tail gas treatment component 6 and discharged, hot fluid obtained by collecting the waste heat of the tail gas by the first heat exchanger 5 respectively carries out heat exchange treatment on air, oxygen and organic solid waste entering the combustion furnace 1 through three preheating branches, the obtained cold fluid (namely cooling water) is pumped back to the first heat exchanger 5 through the circulating pump 10 to continuously absorb the heat of the tail gas, and the three preheating branches are respectively provided with a control valve and a flowmeter which are correspondingly and independently controlled;
(4) The process can realize continuous production operation.
The carbon content of the furnace bottom ash generated in the combustion process and the carbon content of the fly ash collected by the dust remover are tested and analyzed, the two solid ashes are both white and gray from the appearance, no sticky substance is found, the carbon content of the furnace bottom ash is detected to be 0.0003%, and the carbon content of the fly ash is slightly higher than 0.007%. The carbon content is far lower than that of ash and fly ash obtained by pure air combustion in boiling furnace.
(5) In terms of monitoring the furnace temperature of the combustion furnace, the furnace temperature of the combustion furnace is approximately 600 ℃ in the oxygen enrichment stage and is approximately the same as that of the pure oxygen combustion process during the process, and the furnace temperature is 450 ℃ lower than that in the oxygen enrichment stage during the rest of the process. From the life of the furnace body, the furnace body is continuously high in temperature due to long-time pure oxygen combustion, high-temperature creep of metal equipment can be caused, and the service life of the equipment is shortened. And the intermittent high temperature can greatly reduce the risk of high-temperature creep of metal equipment and prolong the service life of the furnace body.
Example 2:
compared with the embodiment 1, the method is mostly the same except for the following differences:
the inverted cone distributor in the combustion furnace 1 is made of No. 45 carbon steel and is distributed below the feed inlet in 5 layers, each layer of the inverted cone distributor is distributed into a circle, and the upper layer distributor and the lower layer distributor are arranged in a staggered mode. The inverted cone distributor length x width x height is 40cm x 40cm.
The air dispersion device and the oxygen dispersion device are of a multi-pipe structure, a porous structure is arranged at a gas outlet of a pipe, 500 holes are uniformly distributed around the dispersion pipe, and the diameter of each hole is 2mm.
The production is carried out by the system, and the effective volume is 2m 3 The fluidized bed furnace of (2) performs a combustion test on tank bottom oil sludge with the organic matter content of 90%, and detects the combustion effect. In the specific treatment process, the time for each air introduction and combustion treatment is 60min, and the time for oxygen introduction and treatment is 10min.
The carbon content of furnace bottom ash generated in the combustion process and the carbon content of fly ash collected by a dust remover are tested and analyzed, the two solid ash are both white grey from the appearance, no sticky substance is found, the carbon content in the furnace bottom ash is detected to be 0.0005%, and the carbon content of the fly ash is slightly higher than 0.008%. The carbon content is still far lower than that of ash and flyash produced by pure air combustion in boiling furnace.
In terms of monitoring the furnace temperature of the combustion furnace, during the process, the furnace temperature of the combustion furnace is at a high temperature of about 640 ℃ in the oxygen enrichment stage, which is the same as that of pure oxygen combustion, and at the rest of the time the furnace temperature is 510 ℃ lower than that of the oxygen enrichment stage. From the life of the furnace body, the long-time pure oxygen combustion causes the furnace body to continuously have high temperature, can cause the high temperature creep of metal equipment, reduces the life of equipment. And the intermittent high temperature can greatly reduce the risk of high-temperature creep of metal equipment and prolong the service life of the furnace body.
The embodiments described above are intended to facilitate a person of ordinary skill in the art in understanding and using the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make modifications and alterations without departing from the scope of the present invention.

Claims (7)

1. The process method for treating organic solid waste based on energy-saving and environment-friendly pulse oxyfuel combustion is implemented by a process device for treating organic solid waste based on energy-saving and environment-friendly pulse oxyfuel combustion, and is characterized in that the process device comprises a combustion furnace, an air supply assembly, an oxygen supply assembly, a cyclone separator, a first heat exchanger and a tail gas treatment assembly, wherein the air supply assembly, the oxygen supply assembly and an organic solid waste source are respectively connected with an air inlet, an oxygen inlet and an organic solid waste inlet on the combustion furnace through an air supply pipeline, an oxygen supply pipeline and a solid waste conveying belt;
the process method comprises the following steps:
(1) Opening an air supply device, introducing air into the combustion furnace, closing an oxygen inlet of the combustion furnace, opening a tail gas outlet, adding combustion-supporting materials into the combustion furnace, and simultaneously conveying the organic solid waste into the combustion furnace through a solid waste conveying belt to perform combustion treatment on the organic solid waste;
(2) In the process of treating organic solid waste by combustion in a combustion furnace, after air is introduced for a period of time, closing an air inlet and an air supply device, opening an oxygen supply device and an oxygen inlet, starting pulse oxygen-enriched combustion operation, after the air inlet time of the oxygen is controlled within a set time range, closing the oxygen inlet and the oxygen supply device, switching to air to enter the combustion furnace, and circulating in the way;
(3) Discharging solid ash residues which are combusted in the combustion furnace, discharging tail gas generated by combustion after heat exchange in a first heat exchanger and then treating the tail gas by a tail gas treatment assembly, wherein hot fluid obtained by collecting waste heat of the tail gas in the first heat exchanger is subjected to heat exchange treatment on air, oxygen and organic solid waste entering the combustion furnace through three preheating branches, and obtained cold fluid is returned to the first heat exchanger;
in the step (2), the time for introducing air into the combustion furnace every time is 5-60min;
in the step (2), the time for introducing oxygen into the combustion furnace each time is 1-30min.
2. The process method for treating organic solid waste through energy-saving and environment-friendly pulse oxyfuel combustion as claimed in claim 1, wherein a second heat exchanger, a third heat exchanger and a fourth heat exchanger are respectively arranged on the air supply pipeline, the oxygen supply pipeline and the solid waste conveyor belt, and the second heat exchanger, the third heat exchanger and the fourth heat exchanger are respectively connected with three preheating branches led out from a hot fluid outlet of the first heat exchanger.
3. The process method for treating organic solid waste by energy-saving and environment-friendly pulse oxygen-enriched combustion as claimed in claim 2, wherein three preheating branches are respectively provided with an independently controlled flow meter and a control valve.
4. The process for energy-saving and environment-friendly pulse oxycombustion treatment of organic solid waste according to claim 1, characterized in that the air supply component is a fan, and the oxygen supply component is an oxygen storage bin.
5. The process method for treating organic solid waste by energy-saving and environment-friendly pulse oxygen-enriched combustion as claimed in claim 2, wherein the third heat exchanger is an energy storage type heat exchanger, and the fourth heat exchanger is a belt dryer.
6. The process method for treating organic solid waste by energy-saving and environment-friendly pulse oxycombustion according to claim 1, characterized in that hot fluids discharged from the three preheating branches are respectively returned to the first heat exchanger by circulating pumps.
7. The process for treating organic solid wastes through energy-saving and environment-friendly pulse oxygen-enriched combustion as claimed in claim 1, wherein the combustion furnace is further provided with an auxiliary material inlet.
CN202010876647.6A 2020-08-27 2020-08-27 Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion Active CN112178647B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010876647.6A CN112178647B (en) 2020-08-27 2020-08-27 Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010876647.6A CN112178647B (en) 2020-08-27 2020-08-27 Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion

Publications (2)

Publication Number Publication Date
CN112178647A CN112178647A (en) 2021-01-05
CN112178647B true CN112178647B (en) 2023-02-03

Family

ID=73925146

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010876647.6A Active CN112178647B (en) 2020-08-27 2020-08-27 Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion

Country Status (1)

Country Link
CN (1) CN112178647B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102494334A (en) * 2011-12-22 2012-06-13 上海锅炉厂有限公司 Coal powder combustion system used in high-moisture type coal oxygen-enriched combustion
CN207762898U (en) * 2017-12-21 2018-08-24 靖江博鑫柯曼燃烧器制造有限公司 One kind being mostly used oxygen-enriched burner
CN108592013A (en) * 2018-05-11 2018-09-28 中国神华能源股份有限公司 Boiler system and its operation method
CN208687734U (en) * 2018-01-20 2019-04-02 广州利世环境治理有限公司 A kind of small continuous consumer waste incineration processing system
CN111121080A (en) * 2019-12-23 2020-05-08 西安交通大学 Carbon-based solid fuel chemical poly-generation coupling low NOxSystem and method for co-combustion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102494334A (en) * 2011-12-22 2012-06-13 上海锅炉厂有限公司 Coal powder combustion system used in high-moisture type coal oxygen-enriched combustion
CN207762898U (en) * 2017-12-21 2018-08-24 靖江博鑫柯曼燃烧器制造有限公司 One kind being mostly used oxygen-enriched burner
CN208687734U (en) * 2018-01-20 2019-04-02 广州利世环境治理有限公司 A kind of small continuous consumer waste incineration processing system
CN108592013A (en) * 2018-05-11 2018-09-28 中国神华能源股份有限公司 Boiler system and its operation method
CN111121080A (en) * 2019-12-23 2020-05-08 西安交通大学 Carbon-based solid fuel chemical poly-generation coupling low NOxSystem and method for co-combustion

Also Published As

Publication number Publication date
CN112178647A (en) 2021-01-05

Similar Documents

Publication Publication Date Title
CN102607040B (en) Method for incinerating domestic garbage and municipal sludge together
CN207483591U (en) The compound pyrolysis system of a kind of sludge, greasy filth
CN102219346A (en) System for drying and treating sludge by utilizing afterheat to generate high-temperature circulating air
CN205279039U (en) Mud and living beings co -combustion power generation system
CN203980292U (en) Cement kiln associated treatment combustible waste material system that can bypass cogeneration
CN110805906A (en) Sludge and garbage drying carbonization pyrolysis combustion treatment system and method
CN201396766Y (en) Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator
CN104033905A (en) System for combustible waste co-processing in cement kiln with bypass exhaust and waste heat power generation
CN112197278A (en) System for coupling sludge drying incineration of secondary reheating power station boiler
CN111621311A (en) Self-heating type carbon heat co-production biomass pyrolysis equipment and process
CN111156529A (en) Method and system for preparing fuel incineration hazardous waste from domestic sludge
CN113883525A (en) Garbage treatment system and method coupled with coal-fired generator set
CN104048297B (en) Cement kiln cooperative processing combustible waste and by-pass exhaust power generation complementary system
CN214400194U (en) Municipal sludge drying pyrolysis carbonization system
CN203116031U (en) System incinerating sludge through smoke waste heat of garbage-incinerating electricity generation
CN211227019U (en) Sludge carbonization cooperative technology complete equipment
CN112178647B (en) Energy-saving and environment-friendly process device and method for treating organic solid waste by pulse oxygen-enriched combustion
CN108644782B (en) Small garbage incineration structure and method thereof
CN108194929B (en) A kind of low heat value wet stock self energizing drying and incinerating System and method for
CN214332741U (en) Circulating fluidized bed fly ash recycling system
CN213060745U (en) Self-heating type carbon heat co-production biomass pyrolysis equipment
CN210951326U (en) Sludge and garbage drying carbonization pyrolysis combustion treatment system
CN211005033U (en) Sludge treatment furnace integrating high-temperature deodorization, carbonization and heat recovery
CN203980293U (en) A kind of cement kiln associated treatment combustible waste material and the power generation complemented system of bypass
CN112943394A (en) System and method for sludge drying and incineration coupled gas-steam combined cycle unit

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
GR01 Patent grant
GR01 Patent grant