CN113324257A - Heat collection type RTO treatment system suitable for high-concentration VOCs waste gas - Google Patents
Heat collection type RTO treatment system suitable for high-concentration VOCs waste gas Download PDFInfo
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- CN113324257A CN113324257A CN202110421790.0A CN202110421790A CN113324257A CN 113324257 A CN113324257 A CN 113324257A CN 202110421790 A CN202110421790 A CN 202110421790A CN 113324257 A CN113324257 A CN 113324257A
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 40
- 239000002912 waste gas Substances 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 16
- 238000006467 substitution reaction Methods 0.000 abstract description 3
- 238000005338 heat storage Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006864 oxidative decomposition reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
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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
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- 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
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- 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
- 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
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Incineration Of Waste (AREA)
- Treating Waste Gases (AREA)
Abstract
本发明公开了一种适用于高浓度VOCs废气的集热式RTO处理系统，其包括RTO系统，RTO系统内设有燃烧室，燃烧室下方设有多个依次排列的功能室，高浓度VOCs废气进气管通过阀门连接引风系统，引风系统与功能室连通，功能室的底部连接烟囱，所述RTO系统中的各个功能室的中部通过阀门与余热锅炉系统并联连接，且余热锅炉系统通过阀门与燃烧室连通形成回路。经该系统处理后排烟温度与正常RTO排烟温度60℃一致，一方面有效解决含高浓度VOCs废气处理RTO的顶部超温问题；另一方面RTO内部的蓄热体分为高温部分和低温部分，本系统的构造实现了余热锅炉对蓄热体高温部分的功能替代，从而极大程度提高了系统的综合热处理能力。
The invention discloses a heat-collecting RTO treatment system suitable for high-concentration VOCs waste gas, which comprises an RTO system, a combustion chamber is arranged in the RTO system, and a plurality of sequentially arranged functional chambers are arranged under the combustion chamber. The air intake pipe is connected to the induced air system through a valve, the induced air system is communicated with the functional room, the bottom of the functional room is connected to the chimney, the middle of each functional room in the RTO system is connected in parallel with the waste heat boiler system through a valve, and the waste heat boiler system is connected through the valve. It communicates with the combustion chamber to form a circuit. The exhaust gas temperature after treatment by this system is consistent with the normal RTO exhaust gas temperature of 60°C. On the one hand, it effectively solves the problem of over-temperature at the top of the RTO containing high-concentration VOCs exhaust gas; on the other hand, the heat storage body inside the RTO is divided into high temperature part and low temperature part Part of the system, the structure of the system realizes the functional substitution of the waste heat boiler for the high temperature part of the regenerator, thereby greatly improving the comprehensive heat treatment capacity of the system.
Description
Technical Field
The invention relates to a heat collection type RTO treatment system suitable for high-concentration VOCs waste gas, and belongs to the technical field of waste gas treatment equipment.
Background
Volatile organic compounds (voc) are important components of atmospheric pollutants, and mainly come from petrochemical, pharmaceutical production, paint decoration, transportation, garbage storage, and other processes. VOCs and SO2And sulfates and nitrates generated by NOX and the like can generate haze mainly containing PM2.5 fine particles under the action of light, and serious influence is caused on human health. At present, the treatment process of the VOCs mainly comprises an absorption method, a direct adsorption method, an adsorption and combustion method, a low-temperature plasma method, a biological method and the like, wherein the adsorption and combustion method is most widely applied and mainly comprises technologies such as catalytic Combustion (CO), regenerative combustion (RTO), regenerative catalytic combustion (RCO) and the like.
At present, the thermal efficiency of most RTO bodies reaches more than 95%, and the exhaust gas temperature of the waste gas entering an RTO system at normal temperature is about 60 ℃. For the RTO for treating high-concentration exhaust gas, due to economic factors such as investment budget and spatial arrangement, the problem of system overtemperature often occurs, so that the safety and the service life of equipment are influenced. In order to avoid the problem, a heat bypass is additionally arranged at the top of the RTO and is kept at a certain opening degree, and the gas exhausted by the heat bypass belongs to clean gas, but the exhaust gas temperature is as high as above 850 ℃, and the exhaust gas must be treated to meet the safe emission standard. In addition, if the high-grade heat source cannot be effectively used, the overall energy efficiency of the system is greatly reduced. For the above situation, there are two main processing methods at present:
1. a heat exchanger is additionally arranged between the top of the RTO and the chimney after the hot bypass (the heat exchange efficiency is about 60-70%), and the temperature of the treated exhaust gas is 200-300 ℃;
2. a heat exchanger is additionally arranged between the top of the RTO and the chimney after the hot bypass (the heat exchange efficiency is about 70-90%), the temperature of the treated exhaust gas is 200-300 ℃, and steam and hot water can be produced at the same time.
The exhaust gas temperature treated by the method meets the requirement of safe emission, but a large amount of medium-grade energy can not be effectively utilized.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the temperature of the treated exhaust gas still has the technical problem that a large amount of medium-grade energy can not be effectively utilized after the temperature of the treated exhaust gas meets the requirement of safe emission.
In order to solve the technical problem, the invention provides a heat collection type RTO treatment system suitable for high-concentration VOCs waste gas, which comprises an RTO system, wherein a combustion chamber is arranged in the RTO system, an ignition device is arranged at the top of the combustion chamber, a plurality of functional chambers which are sequentially arranged are arranged below the combustion chamber, a high-concentration VOCs waste gas inlet pipe is connected with an induced air system through a valve, the induced air system is communicated with the bottom of each functional chamber through a valve, and the bottom of each functional chamber is respectively connected with a chimney through a valve. High-temperature flue gas discharged from the combustion chamber is used as a heat source of a waste heat boiler system and is used for high-grade steam production, medium-grade exhaust gas after heat exchange is sent to the middle part of the RTO system, is subjected to heat exchange again through the ceramic heat accumulator and is finally discharged from the bottom of each functional chamber. High-concentration VOCs waste gas is connected into an RTO system for thermal oxidation, and CO is generated after oxidative decomposition2And water, the gas changed into clean gas is discharged to a chimney through a waste gas outlet pipeline.
Preferably, the high-concentration VOCs waste gas inlet pipe is further connected with an emergency bypass pipeline through a valve, and an air outlet of the emergency bypass pipeline is connected with a chimney; when equipment handles safe operating mode, high concentration VOCs waste gas in the high concentration VOCs waste gas intake pipe directly lets in the chimney.
Preferably, the functional chamber comprises a cleaning chamber, a heating chamber and a cooling chamber in sequence.
Preferably, the air inlet of the induced draft system is communicated with the fresh air system through a fresh air valve.
More preferably, after the heat collection type RTO treatment system is started, the system is purged and heated by fresh air introduced by the fresh air system.
Preferably, the bottom of each functional chamber is connected with an air inlet of an induced draft system through a valve.
Preferably, the high-concentration VOCs waste gas in the high-concentration VOCs waste gas inlet pipe is provided with conveying power by a fan motor in an induced draft system, and the fan motor is controlled by a frequency converter.
The gas treated by the waste heat boiler system is not directly discharged into a chimney, but is continuously introduced into the system from the middle part of the RTO system, so that the high-efficiency utilization of energy is realized.
The invention provides a high-efficiency heat collection type RTO treatment system suitable for high-concentration VOCs waste gas, the temperature of the discharged smoke treated by the system is consistent with the normal RTO discharged smoke temperature of 60 ℃, on one hand, the problem of the top overtemperature of the RTO treated by the waste gas containing high-concentration VOCs is effectively solved; on the other hand, the heat accumulator inside the RTO is divided into a high-temperature part and a low-temperature part, and the structure of the system realizes the function substitution of the waste heat boiler on the high-temperature part of the heat accumulator, so that the comprehensive heat treatment capacity of the system is greatly improved; moreover, a high-grade heat source is used by the waste heat boiler, so that the heat efficiency of the waste heat boiler is improved to the maximum extent, and the grade of the produced steam is ensured; the most key is to fundamentally solve the production benefit problems of energy loss, pipeline material cost improvement and the like caused by conventional discharge, thereby realizing the maximum utilization of system energy.
Compared with the prior art, the invention has the beneficial effects that:
1. the problem of top overtemperature of RTO (room temperature oxidation) for treating waste gas containing high-concentration VOCs (volatile organic compounds) is effectively solved;
2. the structure of the system realizes the functional substitution of the waste heat boiler on the high-temperature part of the heat accumulator, thereby greatly improving the comprehensive heat treatment capacity of the system;
3. the high-grade heat source is used by the waste heat boiler, so that on one hand, the heat efficiency of the waste heat boiler is maximized, and on the other hand, the grade of the produced steam is also ensured;
4. fundamentally solves the problems of energy loss, pipeline material cost improvement and other production benefits brought by conventional discharge.
Drawings
FIG. 1 is a schematic view of a thermal arrest RTO processing system provided in accordance with the present invention.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1, the heat collection type RTO treatment system suitable for high concentration VOCs waste gas provided by the present invention comprises an RTO system 4, a combustion chamber is arranged in the RTO system 4, an ignition device is arranged on the top of the combustion chamber, three functional chambers arranged in sequence are arranged below the combustion chamber, and the functional chambers are a cleaning chamber, a heating chamber and a cooling chamber in sequence.
High concentration VOCs waste gas intake pipe 8 passes through valve e, valve m and connects induced air system 3, emergent bypass line 1 respectively, and induced air system 3 is respectively through the bottom of connecting purge chamber, heating chamber, cooling chamber with valve g, valve i, valve k, and the bottom of purge chamber, heating chamber, cooling chamber is respectively through valve h, valve j, valve l connection chimney 6. The bottoms of the cleaning chamber, the heating chamber and the cooling chamber are also respectively connected with an air inlet of the induced draft system 3 through a valve n, a valve o and a valve p. And a pipeline between the valve e and the air inducing system 3 is communicated with the fresh air system 2 through a fresh air valve f, and after the heat collection type RTO treatment system is started, the system is purged and heated through fresh air introduced by the fresh air system. Emergent bypass line 1 is direct to be connected with chimney 6, and when the equipment treatment safety operating mode, high concentration VOCs waste gas in the high concentration VOCs waste gas intake pipe 8 directly lets in chimney 6.
The combustion chamber in the RTO system 4 is connected with the waste heat boiler system 5 through a valve a, the waste heat boiler system 5 is respectively connected with the middle parts of the cleaning chamber, the heating chamber and the cooling chamber through a valve b, a valve c and a valve d, and a loop is formed between the waste heat boiler system 5 and the combustion chamber. The gas treated by the waste heat boiler system 5 is not directly discharged into the chimney 6, but is continuously introduced into the system from the middle part of the RTO system 4, so that the high-efficiency utilization of energy is realized.
The high-concentration VOCs waste gas in the high-concentration VOCs waste gas inlet pipe 8 is provided with conveying power by a fan motor in the induced draft system 3, and the fan motor is controlled by a frequency converter.
High-temperature flue gas discharged from the combustion chamber is used as a heat source of a waste heat boiler system 5 for high-grade steam production, and heat exchanged mediumAnd (3) feeding the grade exhaust gas into the middle part of the RTO system 4, performing heat exchange again through the ceramic heat accumulator, and finally discharging the exhaust gas from the bottom of each functional chamber. The waste gas of the high-concentration VOCs is connected into an RTO system 4 for thermal oxidation, and CO is generated after oxidative decomposition2And water, the gas changed into clean gas is discharged to a chimney through a waste gas outlet pipeline.
Claims (7)
1. The utility model provides a thermal-arrest formula RTO processing system suitable for high concentration VOCs waste gas, includes RTO system (4), is equipped with the combustion chamber in RTO system (4), and the combustion chamber top is equipped with ignition (7), and the combustion chamber below is equipped with a plurality of function rooms of arranging in proper order, and high concentration VOCs waste gas intake pipe (8) are through valve connection induced air system (3), and valve intercommunication is passed through with the bottom of every function room in induced air system (3), and chimney (6) are connected through the valve respectively to the bottom of every function room, a serial communication port, valve and exhaust-heat boiler system (5) parallel connection are passed through at the middle part of each function room in RTO system (4), and exhaust-heat boiler system (5) form the return circuit through valve and combustion chamber intercommunication.
2. A heat collection RTO treatment system for high concentration VOCs exhaust gas as claimed in claim 1, wherein the high concentration VOCs exhaust gas inlet pipe (8) is further connected to the emergency bypass pipe (1) through a valve, and the outlet of the emergency bypass pipe (1) is connected to the chimney (6); when equipment is used for processing safe working conditions, high-concentration VOCs waste gas in the high-concentration VOCs waste gas inlet pipe (8) is directly introduced into the chimney (6).
3. A thermal arrest RTO processing system for high concentration VOCs exhaust gases as in claim 1, wherein said functional chambers comprise in sequence a purge chamber, a heating chamber, and a cooling chamber.
4. A heat collecting RTO processing system for high concentration VOCs exhaust gas as claimed in claim 1, wherein the air inlet of the induced air system (3) is further connected to the fresh air system (2) through a fresh air valve (f).
5. The heat collection RTO processing system suitable for high concentration VOCs waste gas of claim 4, wherein after the heat collection RTO processing system is started, the system is purged and heated by fresh air introduced by a fresh air system.
6. A thermal-arrest RTO treatment system for high concentration VOCs exhaust gases as in claim 1 wherein the bottom of each of said functional chambers is connected to the inlet of the induction system (3) by a valve.
7. A heat collecting RTO treatment system for high concentration VOCs exhaust gas as claimed in claim 1, wherein the high concentration VOCs exhaust gas in the high concentration VOCs exhaust gas inlet pipe (8) is supplied with power by a fan motor in the induced draft system (3), the fan motor being controlled by a frequency converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110421790.0A CN113324257B (en) | 2021-04-20 | 2021-04-20 | A heat-collecting RTO treatment system suitable for high-concentration VOCs waste gas |
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| CN202110421790.0A CN113324257B (en) | 2021-04-20 | 2021-04-20 | A heat-collecting RTO treatment system suitable for high-concentration VOCs waste gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017767A (en) * | 2021-11-25 | 2022-02-08 | 苏州克兰茨环境科技有限公司 | A system for improving the grade of low-grade steam by using waste gas treatment waste heat |
| CN115253630A (en) * | 2022-06-16 | 2022-11-01 | 广东智环盛发环保科技有限公司 | A kind of RTO exhaust gas treatment system with multiple safety protection and treatment method thereof |
| CN115493159A (en) * | 2022-11-03 | 2022-12-20 | 苏州克兰茨环境科技有限公司 | A near-zero carbon emission VOCs treatment system and treatment method thereof |
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| EP0990848A1 (en) * | 1998-09-29 | 2000-04-05 | Entreprise Generale De Chauffage Industriel Pillard | Process for thermal gas purification and regenerative thermal incinerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114017767A (en) * | 2021-11-25 | 2022-02-08 | 苏州克兰茨环境科技有限公司 | A system for improving the grade of low-grade steam by using waste gas treatment waste heat |
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| CN115493159A (en) * | 2022-11-03 | 2022-12-20 | 苏州克兰茨环境科技有限公司 | A near-zero carbon emission VOCs treatment system and treatment method thereof |
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