CN111637471A - Waste gas and waste liquid incineration treatment process and treatment system containing organic silicon - Google Patents
Waste gas and waste liquid incineration treatment process and treatment system containing organic silicon Download PDFInfo
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- CN111637471A CN111637471A CN202010469822.XA CN202010469822A CN111637471A CN 111637471 A CN111637471 A CN 111637471A CN 202010469822 A CN202010469822 A CN 202010469822A CN 111637471 A CN111637471 A CN 111637471A
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- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 239000002912 waste gas Substances 0.000 title claims abstract description 39
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 25
- 239000010703 silicon Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002699 waste material Substances 0.000 title claims description 14
- 239000003546 flue gas Substances 0.000 claims abstract description 104
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000002918 waste heat Substances 0.000 claims abstract description 50
- 239000000428 dust Substances 0.000 claims abstract description 26
- 238000010791 quenching Methods 0.000 claims abstract description 26
- 230000000171 quenching effect Effects 0.000 claims abstract description 25
- 238000005406 washing Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 239000003513 alkali Substances 0.000 claims abstract description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 9
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 9
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 9
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 10
- 239000006227 byproduct Substances 0.000 claims description 9
- 230000001174 ascending effect Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 8
- 230000007547 defect Effects 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 20
- 239000007789 gas Substances 0.000 description 16
- 239000002253 acid Substances 0.000 description 11
- 238000003860 storage Methods 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 5
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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- 238000001471 micro-filtration Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
Classifications
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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
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- 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
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- 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
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
-
- 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
-
- 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
- F23J2217/50—Intercepting solids by cleaning fluids (washers or scrubbers)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/40—Sorption with wet devices, e.g. scrubbers
-
- 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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a waste gas and liquid incineration treatment process and a waste gas and liquid incineration treatment system containing organic silicon, which relate to the technical field of waste gas and liquid treatment, and the treatment process comprises the following steps: the waste gas and liquid containing organic silicon are fed into incinerator and oxidized and decomposed into small molecular inorganic matter and SiO2Powder; the generated high-temperature flue gas enters a water pipe type waste heat boiler, and the high-temperature flue gas is cooled to550 ℃; the high-temperature flue gas enters a high-temperature bag type dust collector, and the high-temperature bag type dust collector separates and recovers SiO in the high-temperature flue gas2Powder; the high-temperature flue gas is quenched and cooled, then is absorbed by water and neutralized by alkali, and is discharged outside through a chimney after being pressurized. The incineration system, the waste heat recovery system, the flue gas quenching absorption system, the alkali washing system and the pressurizing discharge system are sequentially connected end to end and communicated, and high-temperature flue gas is incinerated by the incineration system and sequentially separated and absorbed by the subsequent system. The invention overcomes the defects of blockage, corrosion and incapability of long-term operation caused by adopting other types of waste heat boilers.
Description
Technical Field
The invention relates to the technical field of waste gas and waste liquid treatment, in particular to a waste gas and waste liquid incineration treatment process and system containing organic silicon.
Background
The organic silicon has the performances of inorganic materials and organic materials, has the basic properties of small surface tension, small viscosity-temperature coefficient, high compressibility, high gas permeability and the like, has the excellent characteristics of high and low temperature resistance, electrical insulation, oxidation resistance stability, weather resistance, flame retardancy, hydrophobicity, corrosion resistance, no toxicity, no odor, physiological inertia and the like, and is widely applied to the industries of aerospace, electronics and electrical, buildings, transportation, chemical engineering, textile, food, light industry, medical treatment and the like. The organic silicon industry is an important component of the modern chemical industry and is a basic industry related to the national civilization.
A large amount of waste gas and waste liquid containing silane substances are generated in the production process of the organic silicon industry. The waste gas and liquid are unstable in property and high in toxicity, and are easy to decompose to generate HCl and other toxic gases and SiO when contacting with air and water2Particles, which are not properly handled, can cause serious safety accidents and environmental accidents.
The incineration treatment process of the organic silicon waste gas and the waste liquid can ensure the complete decomposition of harmful substances, can ensure the complete harmless treatment by matching a reasonable rear system, and is an advanced and most feasible treatment process.
However, the existing burning treatment mode of organic silicon waste liquid and waste gas has the defects of blockage, corrosion and incapability of long-term operation, and an effective tail gas treatment measure is lacked, the tail gas dust exceeds the standard seriously, a large amount of waste water and filter residue are produced as byproducts, and the economical efficiency and the environmental protection are very poor.
Disclosure of Invention
The invention aims to provide a waste gas and waste liquid incineration treatment process containing organic silicon, which aims to solve the technical problems that the organic silicon waste liquid and waste gas incineration treatment mode in the prior art has the defects of blockage, corrosion and incapability of long-term operation, an effective tail gas treatment measure is lacked, the tail gas dust exceeds the standard seriously, a large amount of waste water and filter residues are produced as byproducts, and the economical efficiency and the environmental protection are very poor.
The other purpose of the invention is to provide a waste gas and liquid incineration treatment system containing organic silicon, and the organic silicon waste gas and liquid incineration treatment process is completed by utilizing the organic silicon waste gas and liquid incineration treatment system.
In order to realize one of the purposes, the invention provides the following technical scheme:
the invention provides a waste gas and liquid incineration treatment process containing organic silicon, which comprises the following steps:
s1: the waste gas and liquid containing organic silicon are sent into an incinerator and are oxidized and decomposed into micromolecular inorganic substances and SiO2 powder at high temperature, and the incineration temperature is not less than 1100 ℃;
s2: the generated high-temperature flue gas enters a water pipe type waste heat boiler, the temperature of the high-temperature flue gas is reduced to 550 ℃, and the byproduct is water vapor;
s3: high-temperature flue gas discharged from the water pipe type waste heat boiler enters a high-temperature bag type dust collector, and the high-temperature bag type dust collector separates and recovers SiO in the high-temperature flue gas2Powder;
s4: and the high-temperature flue gas discharged from the high-temperature bag type dust collector is subjected to quenching and cooling, then is subjected to water absorption and alkali neutralization, and is discharged outwards through a chimney after pressurization.
Preferably, in step S1, the residence time of the waste gas liquid containing organosilicon in the incinerator is not less than 2.0 seconds.
In order to achieve the second purpose, the invention provides the following technical scheme:
the invention provides a waste gas and liquid incineration treatment system containing organic silicon, which comprises an incineration system, a waste heat recovery system, a flue gas quenching and absorbing system, an alkali washing system and a pressurization and discharge system, wherein:
the incineration system, the waste heat recovery system, the flue gas rapid cooling absorption system, the alkali washing system and the pressurization discharge system are sequentially connected end to end and communicated, and the high-temperature flue gas is incinerated by the incineration system and sequentially separated and absorbed by a subsequent system.
Preferably, the waste heat recovery system is arranged as a water-tube type waste heat boiler.
Preferably, water tubular exhaust-heat boiler includes steam drum, water intake pipe, outlet pipe way and furnace body, the steam drum simultaneously with the water intake pipe with outlet pipe way connects and communicates, the inside flue gas air current passageway that sets up of furnace body, flue gas air current passageway one side is the flue gas import, and the opposite side is the exhanst gas outlet, flue gas air current passageway is nonlinear type cavity, outlet pipe way forms the lateral wall of flue gas air current passageway.
Preferably, the outlet pipe way includes tedge, upper header and tube bank, the upper header is located the steam pocket with between the furnace body, the tedge intercommunication the steam pocket with the upper header, the tube bank intercommunication the inlet pipe with the upper header, the tube bank is located inside the furnace body, and forms the lateral wall of flue gas air current passageway.
Preferably, the water inlet pipeline comprises a downcomer and a lower header, the lower header is positioned below the furnace body and communicated with the water outlet pipeline, and the downcomer is communicated with the steam drum and the lower header.
Preferably, the flue gas flow channel is arranged as a zigzag channel.
Preferably, a high-temperature bag type dust collector is arranged between the waste heat recovery system and the flue gas quenching absorption system, the high-temperature bag type dust collector is simultaneously connected and communicated with the waste heat recovery system and the flue gas quenching absorption system,
preferably, the flue gas quenching and absorbing system comprises a quenching system and a water washing system, the quenching system is connected and communicated with the high-temperature bag type dust collector, and the water washing system is connected and communicated with the alkali washing system.
The incineration treatment process of the waste gas and liquid containing the organic silicon, provided by the invention, has the following technical effects:
the waste gas and liquid incineration treatment process is the same as the traditional incineration treatment processCompared with the prior art, the waste heat boiler for cooling the high-temperature flue gas generated after burning the waste gas and waste liquid containing the organic silicon is a water tube type waste heat boiler, the cross section of a flue gas flow channel of the water tube type waste heat boiler is larger, and the generated SiO is2The powder is difficult to block up flue gas air current passageway, has overcome the jam that adopts other kind exhaust-heat boiler to lead to, the defect of corruption and can not long-term operation, and the high temperature flue gas after the cooling is through high temperature bag collector, water absorption and alkali neutralization, discharges through the chimney outside after the pressure boost, and tail gas is through effectual processing, and it is serious promptly to have overcome the tail gas dust and exceeds standard, and a large amount of waste water of byproduct and filter residue, economic nature and feature of environmental protection are all very poor defect.
The waste gas and liquid incineration treatment system containing the organic silicon provided by the invention has the following technical effects:
the incineration treatment system comprises an incineration system, a waste heat recovery system, a flue gas quenching absorption system, an alkali washing system and a pressurizing discharge system, wherein the systems are sequentially connected end to end and communicated, high-temperature flue gas is incinerated by the incineration system and sequentially separated and absorbed by a subsequent system, and the waste heat recovery system prevents the produced SiO from being discharged2The powder blocks the flue gas flow path.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of the incineration treatment system for waste gas and liquid containing organosilicon of the present invention;
FIG. 2 is a front view of the water tube type waste heat boiler of FIG. 1;
FIG. 3 is a top plan view of the water tube type waste heat boiler of FIG. 1;
FIG. 4 is a front view of a prior art fired tube waste heat boiler;
fig. 5 is a side view of the fired waste heat boiler of fig. 4.
Wherein, fig. 1-5:
001. a flue gas channel; 002. a flue gas flow channel;
11. a burner; 12. an incinerator; 21. a water tube type waste heat boiler; 211. a steam drum; 212. a water inlet pipeline; 2121. a down pipe; 2122. a lower header; 213. a water outlet pipeline; 2131. a riser pipe; 2132. an upper header; 2133. tube bundle; 214. a furnace body; 22. an ash storage tank;
31. a high temperature bag house; 41. a quench system; 42. a water washing system; 43. an acid storage tank; 51. an alkaline washing system; 61. an induced draft fan; 71. and (4) a chimney.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The incineration system, the waste heat recovery system, the flue gas rapid cooling absorption system, the alkaline washing system 51 and the pressurized discharge system are sequentially connected end to end and communicated, and the high-temperature flue gas is incinerated by the incineration system and sequentially separated and absorbed by the subsequent system.
The incineration system is composed of a burner 11 and an incinerator 12, as shown in fig. 1, exhaust gas, waste liquid, fuel and combustion air are delivered to the burner 11, the exhaust gas and the waste liquid are combusted in the incinerator 12 with the aid of the fuel and the combustion air, and high-temperature oxidative decomposition is carried out to CO2、H2O、HCl、NOxSmall molecular inorganic substance and large amount of SiO2Powder, the generated smoke contains a large amount of N2And part of excess O2The incineration temperature of the incinerator 12 is more than or equal to 1100 DEG CThe retention time is more than or equal to 2.0 seconds.
The waste heat recovery system is a water-tube type waste heat boiler 21, as shown in fig. 1 to 3, the high-temperature flue gas generated by incineration enters the water-tube type waste heat boiler 21, the temperature of the high-temperature flue gas is reduced to 550 ℃, and water vapor is byproduct. While recovering the sensible heat of the high-temperature flue gas, the regeneration of dioxin is avoided for chlorine-containing organic matters, and the temperature interval of 200-500 ℃ is avoided for heat energy utilization. At the incineration temperature of more than 1100 ℃, the decomposition rate of dioxin in the flue gas reaches more than 99.9 percent, so the outlet temperature of the water tube type waste heat boiler 21 is 500-600 ℃, and after passing through the water tube type waste heat boiler 21, the temperature of the flue gas is reduced from 1200 ℃ to about 550 ℃, thereby avoiding the recovery of heat while the dioxin is regenerated into a temperature interval.
Water tubular waste heat boiler 21 includes steam drum 211, water intake pipe 212, outlet pipe 213 and furnace body 214, as shown in fig. 2, steam drum 211 is connected and communicates with water intake pipe 212 and outlet pipe 213 simultaneously, the inside flue gas air current passageway 002 that sets up of furnace body 214, flue gas air current passageway 002 one side is the flue gas import, the opposite side is the exhanst gas outlet, flue gas air current passageway 002 is nonlinear type cavity, outlet pipe 213 forms the lateral wall of flue gas air current passageway 002, the high temperature flue gas that flows through flue gas air current passageway 002 is the rivers heating through outlet pipe 213, thereby reach the purpose for the cooling of high temperature flue gas, compare with current fire tube waste heat boiler, water tubular waste heat boiler 21's flue gas air current passageway 002 cross-sectional area is great, can hold the high temperature flue gas stream of large capacity simultaneously, and SiO among the2The powder also does not easily block the flue gas flow channel 002.
The lower part of the water tube type waste heat boiler 21 is provided with an ash storage tank 22, the ash storage tank 22 is provided with a double-layer isolation valve (not shown in the figure), and the generated SiO2The powder is conveyed to the ash storage tank 22 by compressed air for storage, thereby achieving the purpose of timely discharging ash.
As shown in fig. 4 and 5, which are schematic structural diagrams of the fire tube type waste heat boiler, a flue gas flow channel 001 of the fire tube type waste heat boiler extends from a process gas inlet to a process gas outlet, high-temperature flue gas enters from the process gas inlet of the fire tube type waste heat boiler and then diffuses along the flue gas flow channel 001, the flue gas flow channel 001 of the fire tube type waste heat boiler is small, and no ash discharge measure is provided, so that the blockage is serious, the continuous operation capability is poor, the continuous operation period is generally not more than one month, and frequent stopping is needed for ash removal.
The flue gas flow channel 002 of the water tube type waste heat boiler 21 is preferably a Z-shaped channel, and the high temperature flue gas turbulence is realized through the Z-shaped channel, so that the high temperature flue gas can stay in the furnace body 214 for a long time, and the radiation heat transfer efficiency of the high temperature flue gas is improved.
Specifically, the water outlet pipeline 213 includes an ascending pipe 2131, an upper header 2132 and a pipe cluster 2133, as shown in fig. 2, the upper header 2132 is located between the steam drum 211 and the furnace body 214, the ascending pipe 2131 communicates the steam drum 211 with the upper header 2132, the pipe cluster 2133 communicates the water inlet pipeline 212 with the upper header 2132, the pipe cluster 2133 is located inside the furnace body 214 and forms a side wall of the flue gas flow channel 002, that is, when the water flow of the water inlet pipeline 212 flows through the pipe cluster 2133 to the upper header 2132, the water flow in the pipe cluster 2133 can take away the heat of the high temperature flue gas in the flue gas flow channel 002.
The water inlet 212 includes a downcomer 2121 and a lower header 2122. As shown in FIG. 2, the lower header 2122 is located below the furnace body 214 and communicates with the tube bundle 2133. the downcomer 2121 communicates with the steam drum 211 and the lower header 2122, and water is supplied to the tube bundle 2133 through the downcomer 2121 and the lower header 2122.
In a further proposal, a high-temperature bag type dust collector 31 is arranged between the waste heat recovery system and the flue gas quenching absorption system, the high-temperature bag type dust collector 31 is simultaneously connected and communicated with the waste heat recovery system and the flue gas quenching absorption system,
the high-temperature bag filter 31 of the invention, namely a ceramic filter, is a bag filter which uses a membrane material as a dust removal filter material, the high-temperature gas filtration belongs to microfiltration, dust is intercepted by a membrane, and gas molecules pass through an intermetallic compound porous membrane.
Traditional organosilicon system of burning, SiO in the flue gas2Powder directly enters a quenching absorption systemThe acid produced has a large amount of SiO2The powder is neutralized by alkali, pressed into a filter cake through a filter pressing system and sent out, so that not only can acid not be recovered, but also a large amount of neutralized wastewater and filter cake are generated. The high-temperature bag type dust collector 31 can not only recover SiO in the flue gas2The powder can reduce the dust content of the by-product acid and improve the quality of the acid. The high-temperature bag type dust collector 31 is SiO recovered from more than 500 DEG C2Powder of SiO2The HCl adsorption in the powder is very low, improving the recovery of SiO2Quality of the powder. Meanwhile, a series of devices such as neutralization and filter pressing are reduced, the system is optimized, and the initial investment cost and the running cost are reduced.
In a further scheme, the flue gas quenching and absorbing system comprises a quenching system 41 and a water washing system 42, wherein the quenching system 41 is connected and communicated with the water washing system 42, the quenching system 41 is connected and communicated with the high-temperature bag type dust collector 31, the water washing system 42 is connected and communicated with an alkali washing system 51, the quenching system 41 and the water washing system 42 are simultaneously connected and communicated with an acid storage tank 43, and secondary acid generated by the quenching system 41 and the water washing system 42 flows into the acid storage tank 43.
The high-temperature flue gas from the water-tube type waste heat boiler 21 enters a quenching system 41, namely a graphite quencher, the flue gas is directly contacted with circulating acid liquor, the latent heat of the evaporation of the acid liquor enables the temperature of the flue gas to be rapidly reduced, and the temperature of the flue gas is rapidly reduced from 550 ℃ to below 80 ℃ within 0.1 s. The cooling time is far shorter than 1s specified by the national standard specification, and the resynthesis of dioxin substances in the system is reduced to the maximum extent.
The flue gas enters a water washing system 42 after being quenched, HCI in the flue gas is absorbed by water, more than 99% of HCl in the high-temperature flue gas is recovered, and the byproduct hydrochloric acid is output to a boundary region.
In a further scheme, the flue gas after absorption and deacidification enters an alkaline washing system 51, and residual acid in the flue gas is absorbed and neutralized by alkali liquor, so that the flue gas is ensured to be discharged up to the standard, and the generated wastewater is discharged outwards. The deacidified flue gas is pressurized by the induced draft fan 61 and then discharged through the chimney 71, and the induced draft fan 61 ensures that the whole system is in a negative pressure state.
The process steps of the incineration treatment system utilizing the waste gas and the waste liquid containing the organic silicon are as follows:
s1: the waste gas and liquid containing organic silicon are sent into an incinerator 12 and are oxidized and decomposed into micromolecular inorganic substances and SiO2 powder at high temperature, and the incineration temperature is not less than 1100 ℃;
s2: the generated high-temperature flue gas enters a water pipe type waste heat boiler 21, the temperature of the high-temperature flue gas is reduced to 550 ℃, and the byproduct is water vapor;
s3: the high-temperature flue gas from the water tube type waste heat boiler 21 enters a high-temperature bag type dust collector 31, and the high-temperature bag type dust collector 31 separates and recovers SiO in the high-temperature flue gas2Powder;
s4: the high-temperature flue gas from the high-temperature bag type dust collector 31 is quenched and cooled, then is absorbed by water and neutralized by alkali, and is discharged outside through a chimney 71 after pressurization.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A waste gas and liquid incineration treatment process containing organic silicon is characterized by comprising the following steps:
s1: the waste gas and liquid containing organic silicon are fed into incinerator and high-temp. oxidation decomposed into small molecular inorganic substance and SiO2Powder, wherein the burning temperature is not less than 1100 ℃;
s2: the generated high-temperature flue gas enters a water pipe type waste heat boiler, the temperature of the high-temperature flue gas is reduced to 550 ℃, and the byproduct is water vapor;
s3: high-temperature flue gas discharged from the water pipe type waste heat boiler enters a high-temperature bag type dust collector, and the high-temperature bag type dust collector separates and recovers SiO in the high-temperature flue gas2Powder;
s4: and the high-temperature flue gas discharged from the high-temperature bag type dust collector is subjected to quenching and cooling, then is subjected to water absorption and alkali neutralization, and is discharged outwards through a chimney after pressurization.
2. The incineration disposal process of waste gas and liquid containing silicone as claimed in claim 1, wherein in step S1, the residence time of waste gas and liquid containing silicone in said incinerator is not less than 2.0 seconds.
3. The utility model provides a waste gas waste liquid incineration disposal system who contains organosilicon which characterized in that, is including burning system, waste heat recovery system, flue gas rapid cooling absorption system, alkali wash system and pressure boost discharge system, wherein:
the incineration system, the waste heat recovery system, the flue gas rapid cooling absorption system, the alkali washing system and the pressurization discharge system are sequentially connected end to end and communicated, and the high-temperature flue gas is incinerated by the incineration system and sequentially separated and absorbed by a subsequent system.
4. The system for incinerating waste gas and liquid containing silicone according to claim 3, wherein the waste heat recovery system is configured as a water-tube type waste heat boiler.
5. The system of claim 4, wherein the water tube type waste heat boiler comprises a steam drum, a water inlet pipeline, a water outlet pipeline, and a boiler body, the steam drum is connected and communicated with the water inlet pipeline and the water outlet pipeline, a flue gas flow channel is arranged inside the boiler body, one side of the flue gas flow channel is a flue gas inlet, the opposite side of the flue gas flow channel is a flue gas outlet, the flue gas flow channel is a nonlinear hollow cavity, and the water outlet pipeline forms a side wall of the flue gas flow channel.
6. The system for incinerating waste gas and liquid containing silicone according to claim 5, wherein the water outlet pipeline comprises an ascending pipe, an ascending header and a pipe bundle, the ascending pipe is located between the steam drum and the furnace body, the ascending pipe is communicated with the steam drum and the ascending header, the pipe bundle is communicated with the water inlet pipeline and the ascending header, and the pipe bundle is located inside the furnace body and forms a side wall of the flue gas flow channel.
7. The system for incinerating waste gas and liquid containing silicone according to claim 5, wherein the water inlet pipeline comprises a downcomer and a lower header, the lower header is located below the furnace body and is communicated with the water outlet pipeline, and the downcomer is communicated with the steam drum and the lower header.
8. The system for incinerating waste gas and liquid containing silicone according to claim 5, wherein the flue gas flow channel is configured as a Z-shaped channel.
9. The system for incinerating and treating waste gas and liquid containing silicone according to claim 5, wherein a high-temperature bag filter is arranged between the waste heat recovery system and the flue gas quenching and absorbing system, and the high-temperature bag filter is connected and communicated with the waste heat recovery system and the flue gas quenching and absorbing system at the same time.
10. The system for incinerating and treating waste gas and liquid containing silicone according to claim 9, wherein the flue gas quenching and absorbing system comprises a quenching system and a water washing system, the quenching system is connected and communicated with the high-temperature bag type dust collector, and the water washing system is connected and communicated with the alkali washing system.
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