CN101716462A - Catalysis and oxidation method of high-concentration waste gas - Google Patents
Catalysis and oxidation method of high-concentration waste gas Download PDFInfo
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- CN101716462A CN101716462A CN201010103592A CN201010103592A CN101716462A CN 101716462 A CN101716462 A CN 101716462A CN 201010103592 A CN201010103592 A CN 201010103592A CN 201010103592 A CN201010103592 A CN 201010103592A CN 101716462 A CN101716462 A CN 101716462A
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Abstract
The invention discloses a catalysis and oxidation method of high concentration waste gas. After mixing and preheating, waste gas and air sequentially pass through a multilevel catalyst layer and a multilevel heat removing layer at intervals, are catalyzed and oxidized and are exhausted after heat is recovered. In the method, after segmentation oxidation and step treatment are adopted, the environmental protection effect is enhanced by about 10-20 percent compared with a single reactor; because the high point temperature of the catalyst layer is lowered by 50-100 DEG C, the service life of a catalyst is prolonged by about 1-2 years; and when treating high concentration organic gas, the system has high heat stability.
Description
Technical field
The present invention relates to a kind of waste treatment method, relate in particular to a kind of catalysis and oxidation method of high-concentration waste gas.
Background technology
Raising along with environmental requirement, the processing of high-concentration organic waste gas more and more obtains the attention of each manufacturer such as chemical industry, catalytic burning is the emerging advanced technology of the processing organic exhaust gas that progressively develops in recent years, it is to adopt catalyst such as noble metal platinum, palladium that the organic exhaust gas of volatile organic matter low-temperature oxidation burning is carried out treatment technology, nearly all volatile organic matter all can be in 200-650 ℃ scope catalytic combustion, make organic matter or conversion of nitrogen oxides become carbon dioxide, hydrogen chloride, nitrogen dioxide, sulfur dioxide, chlorine, water and nitrogen.The noble metal catalyst that three series are arranged in the market: metal beehive noble metal catalyst, ceramic honeycomb noble metal catalyst, ceramic ball-type noble metal catalyst.Wherein the metal beehive noble metal catalyst have active high, mechanical strength is high, Heat stability is good, pressure drop are little, be easy to clean, the characteristics of long service life, estimate will replace ball shape catalyst and ceramic catalyst at petrochemical industry.The catalytic burning technology has and need not any auxiliary fuel in the normal productive process, and system is simple to operate, reliable, and the characteristics that operating cost is low have extraordinary social benefit and economic benefit.Be applied at present: the nitric acid tail gas catalytic reduction is handled, the acrylonitrile end gas catalytic oxidation is handled, the acrylic acid end gas catalytic oxidation is handled, phthalic anhydride (PA), cis-butenedioic anhydride (MA), the maleic acid end gas catalytic oxidation is handled, the styrene end gas catalytic oxidation is handled, the phenol-acetone end gas catalytic oxidation, the urea end gas catalytic oxidation is handled, the polyacrylamide end gas catalytic oxidation is handled, the ABS vent gas treatment, the rubber industry vent gas treatment, the refinery tail-gas catalytic oxidation treatment, paint, spraying, the electronics industry vent gas treatment, in the field of textile industry vent gas treatment.Replace complicated operation gradually, the heating power CIU that energy consumption is high.
The catalytic burning common processes is described below: organic exhaust gas and additional air after the tail gas heat exchanger preheating, behind the heater via (only general drive use), reach initial temperature 200-300 ℃ after, enter catalyst oxidation reactor, organic matter is oxidized to CO at this
2And H
2Inorganic matters such as O.The oxidation reaction liberated heat enters atmosphere after heat reclaim unit and tail gas heat exchanger.
In commercial process, the composition of high-concentration organic waste gas often is not an one-component, and normally the mixture of multiple material is an example with acroleic acid device tail gas, and its organic component has; Acetic acid, toluene, acrylic acid, methacrylaldehyde, propylene, propane, esters of acrylic acid, alcohols, aldehydes, or the like nearly tens kinds of compositions.And the burning-point of these compositions has nothing in common with each other from high to low, and the thermal discharge during burning is also inequality, and oxidation reaction speed is also different, the more important thing is when suitability for industrialized production, and the component content of its raw material and flow also change taking place under different conditions.This just brings bigger difficulty to steady production, in catalytic reactor, general filling layer 2-4 catalyst, the inorganic matter that burning-point is low, oxidation rate is fast is earlier oxidized, emits heat, along with deeply carrying out of reaction, the temperature of each layer catalyst is progressively improved, the organic matter of high burning-point also begins oxidation, and further emits heat, and reaction bed temperature is raised step by step.With 3 layers is example, because of organic matter time of staying in three layers of catalyst very short, oxidation reaction is done rapidly, if control of export is low excessively, high burning-point organic matter light-off time is later, and reaction does not finish fully, promptly is terminated, still also there is organic matters in tail gas like this, and does not reach environmental requirement.If the control of reactor bed outlet temperature is too high, reaction can be too fierce like this, in case external condition changes slightly, slightly increase or the air capacity added has bigger fluctuation etc. as: charging organic concentration, the capital temperature that induces reaction increases sharply, even chain shutdown system is arranged on the technology, but because of this process time very short, generally at 10 seconds～30 seconds, when discovered, had little time control, and caused the beds temperature runaway, serious will damage catalyst, even cause security incident.Catalyst is infringement in a single day, and noble metal effective ingredient wherein will run off, and carrier also may be burnt also and might cave in.So the catalyst that damages is non-renewable and reuse.Normally last one deck Yin Wendu is the highest for the catalyst that damages, and damage the most serious, next level it, ground floor damages the lightest.
In chemical industry actual production control procedure, the control of reaction temperature is most important.If temperature control is low, reaction is incomplete, and the organic gas residual volume does not then reach environmental requirement more just by emptying.If temperature control is high, not only catalyst life shortens greatly, because of in the process of operation continuously, destabilizing factor is more simultaneously, and the steady rate of control is difficult to guarantee, fluctuation is arranged slightly, very easily cause temperature runaway, promptly might in 30 seconds, temperature reach fast more than 650 ℃, even can reach 1000 ℃, this will cause crushing the damage to catalyst, also bring bigger hidden danger to safety in production.
Summary of the invention
In order to address the deficiencies of the prior art, the purpose of this invention is to provide a kind of catalysis and oxidation method of high-concentration waste gas, branch two-stage or multistage waste gas is carried out catalytic oxidation.
Technical scheme of the present invention is:
Catalysis and oxidation method of high-concentration waste gas of the present invention, industrial waste gas is first to be mixed into the waste gas for the treatment of catalysis with air, after this waste gas is heated (preheating), passes through multistage Catalytic Layer successively with interval and removes thermosphere, and discharge by multistage catalytic oxidation and after reclaiming heat.
Described high-concentration waste gas total content of organic carbon (TOC)＞1000mg/m
3
Catalytic Layer is filled with the required catalyst of catalysis.Remove and be marked with steam, conduction oil or water under high pressure etc. in the thermosphere and remove thermal medium,, make that the EGT through Catalytic Layer is descended, continue by catalytic oxidation thereby enter the next stage Catalytic Layer to absorb heat.The temperature in waste gas one-level Catalytic Layer in office exit is 350-550 ℃, and waste gas is 220-300 ℃ in the temperature of next stage Catalytic Layer import department after removing thermosphere cooling.
Among the present invention, Catalytic Layer is more than 2 grades, and removing thermosphere is more than 1 grade.Waste gas is removed thermosphere by the first order Catalytic Layer and the first order earlier, and then removes thermosphere by the second level Catalytic Layer and the second level, when the waste gas after 2 grades of catalytic oxidation treatment reaches environmental requirement, can discharge after heat recovery; As do not reach environmental requirement, then can increase the third level or more multistage Catalytic Layer and remove thermosphere, till reaching environmental requirement.
The invention has the beneficial effects as follows:
Catalysis and oxidation method of high-concentration waste gas of the present invention, adopt catalytic oxidation step by step and with remove the mode that thermosphere combines and improved the device operation stability greatly, also can effectively prolong the service life of catalyst, thereby bring favorable economic benefit.The method of the invention is when handling the high concentration organic gas, and there is very high heat endurance in system.After taking the segmentation oxidation and progressively handling, environment protecting is compared with single-reactor and is improved about 10-20%, and because of 50-100 ℃ of catalysis floor height point temperature reduction, catalyst life increases 1-2 approximately.
Description of drawings
Fig. 1 is multistage Catalytic Layer of the present invention and the structural representation of removing thermosphere;
Fig. 2 is the cross-sectional view of Catalytic Layer of the present invention;
Fig. 3 is the cross-sectional view that the present invention removes thermosphere.
The specific embodiment
Further specify architectural feature of the present invention below in conjunction with accompanying drawing.
Fig. 1 is multistage Catalytic Layer of the present invention and the structural representation of removing thermosphere, and the direction of arrow is exhaust gas flow direction among the figure; Fig. 2 is the cross-sectional view of Catalytic Layer; Fig. 3 is the cross-sectional view of removing thermosphere.
Removing thermosphere among Fig. 1 and Fig. 3 is finned heat exchanger, wherein is marked with steam.The waste gas that is mixed with air is removed thermosphere 21 by the first order Catalytic Layer 11 and the first order earlier after heating, make the temperature of exit gas reach 220-500 ℃ (temperature can be controlled by the flow that thermal medium is removed in adjusting) herein.Enter second level Catalytic Layer 12 then, the remaining organic gas of not oxidized processing is further oxidized, and the organic gas temperature of coming out can reach 400～600 ℃, reaches environmental requirement as waste gas, can discharge after heat recovery; As do not reach requirement, and the second level can be set remove thermosphere and third level Catalytic Layer, still do not reach requirement as waste gas, the third level can be set remove thermosphere and fourth stage Catalytic Layer, increase multistage thermosphere and the Catalytic Layer of removing in a similar manner, till reaching environmental requirement.Both sides every grade of catalytic bed can increase manhole, so that the inspection of catalyst and replacing.Also can catalytic bed, heat exchanger be made up by individual equipment according to similar principle, control principle and requirement are all fours.
Claims (7)
1. after catalysis and oxidation method of high-concentration waste gas, waste gas mix with air and be preheated, with interval through multistage Catalytic Layer and the multistage thermosphere of removing, discharge successively by catalytic oxidation and after reclaiming heat.
2. catalysis and oxidation method of high-concentration waste gas according to claim 1, the total content of organic carbon that it is characterized in that described high-concentration waste gas is greater than 1000mg/m
3
3. catalysis and oxidation method of high-concentration waste gas according to claim 1 is characterized in that the temperature in described any one-level Catalytic Layer exit is 350-550 ℃.
4. catalysis and oxidation method of high-concentration waste gas according to claim 1 is characterized in that the temperature of described any one-level Catalytic Layer import department is 220-300 ℃.
5. catalysis and oxidation method of high-concentration waste gas according to claim 1 is characterized in that described Catalytic Layer is more than 2 grades.
6. catalysis and oxidation method of high-concentration waste gas according to claim 1 is characterized in that the described thermosphere of removing is more than 1 grade.
7. catalysis and oxidation method of high-concentration waste gas according to claim 1 is characterized in that the described a kind of thermal medium of removing that is marked with steam, conduction oil or water under high pressure in the thermosphere of removing.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698578A (en) * | 2011-04-08 | 2012-10-03 | 上海同利环境科技有限公司 | Process for synchronously removing nitrogen oxide, dioxin and offensive odor in flue gas from waste incineration |
| CN103047662A (en) * | 2011-10-17 | 2013-04-17 | 中国石油化工股份有限公司 | Catalytic combustion treatment device and treatment method for organic waste gases |
| CN103908891A (en) * | 2014-04-04 | 2014-07-09 | 安徽省含山县天顺环保设备有限公司 | Waste gas purification environmental protection machine |
| CN105605595A (en) * | 2016-01-12 | 2016-05-25 | 北京化工大学 | Integrated purification method and system for industrial waste gas containing cyanogen, hydrocarbon and NOx |
| CN105650651A (en) * | 2014-12-05 | 2016-06-08 | 中国石油化工股份有限公司 | Purification treatment method of high-concentration organic waste gas |
| CN108905617A (en) * | 2018-09-07 | 2018-11-30 | 云汇环保科技南通有限公司 | A kind of catalysis oxidation heat recovery apparatus of temperature self-regulating nodal pattern |
| CN110292854A (en) * | 2019-07-03 | 2019-10-01 | 浙江工商大学 | A kind of pulse plasma couples the apparatus and method of double-fluidized-bed catalytic degradation VOCs |
| CN111330437A (en) * | 2020-03-01 | 2020-06-26 | 北京化工大学 | Method and system for cooperatively purifying multiple pollutants in adipic acid production |
-
2010
- 2010-01-26 CN CN201010103592A patent/CN101716462A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698578A (en) * | 2011-04-08 | 2012-10-03 | 上海同利环境科技有限公司 | Process for synchronously removing nitrogen oxide, dioxin and offensive odor in flue gas from waste incineration |
| CN103047662A (en) * | 2011-10-17 | 2013-04-17 | 中国石油化工股份有限公司 | Catalytic combustion treatment device and treatment method for organic waste gases |
| CN103908891A (en) * | 2014-04-04 | 2014-07-09 | 安徽省含山县天顺环保设备有限公司 | Waste gas purification environmental protection machine |
| CN105650651A (en) * | 2014-12-05 | 2016-06-08 | 中国石油化工股份有限公司 | Purification treatment method of high-concentration organic waste gas |
| CN105650651B (en) * | 2014-12-05 | 2018-04-10 | 中国石油化工股份有限公司 | A kind of purifying treatment method of high-concentration organic waste gas |
| CN105605595A (en) * | 2016-01-12 | 2016-05-25 | 北京化工大学 | Integrated purification method and system for industrial waste gas containing cyanogen, hydrocarbon and NOx |
| US10315160B2 (en) | 2016-01-12 | 2019-06-11 | Beijing University Of Chemical Technology | Integrated purification method and system for the industrial exhaust gas containing cyanides, hydrocarbons and NOx |
| CN108905617A (en) * | 2018-09-07 | 2018-11-30 | 云汇环保科技南通有限公司 | A kind of catalysis oxidation heat recovery apparatus of temperature self-regulating nodal pattern |
| CN110292854A (en) * | 2019-07-03 | 2019-10-01 | 浙江工商大学 | A kind of pulse plasma couples the apparatus and method of double-fluidized-bed catalytic degradation VOCs |
| CN111330437A (en) * | 2020-03-01 | 2020-06-26 | 北京化工大学 | Method and system for cooperatively purifying multiple pollutants in adipic acid production |
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Owner name: ZHEJIANG SATELLITE PETROCHEMICAL CO., LTD. Free format text: FORMER OWNER: ZHEJIANG SATELLITE ACRYLIC ACID PRODUCING CO., LTD. Effective date: 20110209 |
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Effective date of registration: 20110209 Address after: 314001, Jiaxing Industrial Park, Zhejiang Province on the west side of the road Applicant after: Zhejiang Satellite Petro Chemical Co., Ltd. Address before: 314001 Zhejiang, Jiaxing Industrial Park, west of the road on the West step Applicant before: Zhejiang Satellite Acrylic Manufacturing Co., Ltd. |
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Application publication date: 20100602 |