CN109011868B - Catalytic system, application thereof, purification method and purification system - Google Patents

Catalytic system, application thereof, purification method and purification system Download PDF

Info

Publication number
CN109011868B
CN109011868B CN201810896699.2A CN201810896699A CN109011868B CN 109011868 B CN109011868 B CN 109011868B CN 201810896699 A CN201810896699 A CN 201810896699A CN 109011868 B CN109011868 B CN 109011868B
Authority
CN
China
Prior art keywords
catalytic
adsorption
organic waste
waste gas
module
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
CN201810896699.2A
Other languages
Chinese (zh)
Other versions
CN109011868A (en
Inventor
贾宏鹏
于恩祺
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.)
Institute of Urban Environment of CAS
Original Assignee
Institute of Urban Environment of CAS
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 Institute of Urban Environment of CAS filed Critical Institute of Urban Environment of CAS
Priority to CN201810896699.2A priority Critical patent/CN109011868B/en
Publication of CN109011868A publication Critical patent/CN109011868A/en
Application granted granted Critical
Publication of CN109011868B publication Critical patent/CN109011868B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/104—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/20—Organic adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/2073—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/209—Other metals
    • B01D2255/2092—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/802—Visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

The invention belongs to the field of organic waste gas purification, and discloses a catalytic system and application thereof, and a purification method and a purification system of organic waste gas. The organic waste gas purification method comprises the step of carrying out photo-thermal catalytic degradation reaction or photo-thermal concerted catalytic degradation reaction on organic waste gas to be purified in the presence of a catalytic system, wherein the catalytic system consists of a dark catalytic material and a light source, and the light source irradiates on the dark catalytic material to generate enough heat to initiate the thermal catalytic reaction or the photo-thermal concerted catalytic reaction. The catalytic system provided by the invention adopts light source irradiation to spontaneously generate enough heat on the surface of a dark catalytic material to initiate a thermal catalytic reaction or a photo-thermal concerted catalytic reaction, so that the purification efficiency of organic waste gas can be improved, and high efficiency and energy conservation can be realized.

Description

Catalytic system, application thereof, purification method and purification system
Technical Field
The invention belongs to the field of organic waste gas purification treatment, and particularly relates to a catalytic system and application thereof, and a purification method and a purification system for organic waste gas.
Background
VOCs refer to organic compounds with a saturated vapor pressure of more than 133.32Pa at normal temperature and a boiling point of 50-260 ℃ at normal pressure, or any organic solid or liquid capable of volatilizing at normal temperature and normal pressure. The hazards of VOCs include two major categories: one is direct harm, can stimulate the respiratory system of human beings and animals to cause the pathological changes of the respiratory system, and a plurality of VOCs have the functions of carcinogenesis, teratogenesis and mutagenesis; the other is secondary hazard, and VOCs can cause some photochemical reactions in the air to cause disasters such as haze, photochemical smog and the like.
With the continuous development of economy and social progress in China, the discharge amount of VOCs is continuously increased, and if the VOCs are not effectively treated and released into the environment in an unorganized discharge mode, the VOCs can seriously affect the natural environment and the body health of peripheral related personnel. Therefore, the processing research aiming at the VOCs is always a hotspot problem in the field of environmental science and is also a scientific research attack in a future period.
The prior VOCs treatment method mainly adopts the following steps: the condensation method, the adsorption method, the combustion method and the like have the problems of high equipment investment, high operation cost, small treatment gas amount, unstable work, large occupied space, low treatment efficiency, secondary pollution and the like in different degrees, and specifically comprise the following steps:
(1) condensation method: the method is suitable for treating waste gas with high concentration, low temperature and small air quantity, but the measure has large investment, high energy consumption and high operating cost, so the method is not generally adopted for treating triphen pollution in spraying operation, and the spraying waste gas has the characteristics of large air quantity, low concentration, more paint mist and the like, and a corresponding pretreatment process (removing paint mist particles) is required to be designed before entering a condensation process, otherwise, a condenser is blocked.
(2) An adsorption method: the method is suitable for waste gas treatment with low concentration and no need of recovering pollutants. The activated carbon is a common adsorption material, but the single adsorption process is not suitable for purifying organic waste gas for a long time, and if a regeneration module is not provided, the activated carbon needs to be replaced regularly, so that the operation cost is very high.
(3) The combustion method comprises the following steps: the method has the advantages of low energy consumption, high purification rate (95-97%), no secondary pollution, simple process, convenient operation, suitability for treating high-temperature, high-concentration and small-air-volume organic waste gas, inapplicability for treating low-concentration and large-air-volume organic waste gas, and the concentration of triphen in the spray paint waste gas is generally lower than 300-3Therefore, the direct combustion method and the catalytic combustion method are not suitable for treatment, and the paint spraying waste gas contains a lot of paint mist particles, so that pretreatment is needed, and if the paint spraying waste gas directly enters the combustion module, the catalyst can be poisoned and the risk of explosion is caused.
In addition, the adsorption concentration-catalytic combustion method is also widely used as the most practical purification method at present, and in this case, in the treatment process of the organic waste gas, the catalytic system usually adopts a thermal catalytic mode that an external heat source provides energy, and the high energy consumption caused by the thermal catalytic mode makes the cost of purifying the organic waste gas high.
Disclosure of Invention
The invention aims to solve the problems of the prior thermal catalysis method for purifying the organic waste gas, and provides a novel catalytic system and application thereof, and a method and a system for purifying the organic waste gas.
The catalytic system provided by the invention consists of a dark catalytic material and a light source, wherein the light source irradiates on the dark catalytic material to generate enough heat to initiate a thermal catalytic reaction or a photo-thermal synergistic catalytic reaction.
Preferably, the active material in the dark-coloured catalytic material is selected from at least one of transition metal oxides, carbon materials and precious metal materials. Most preferably, the active substance in the dark-colored catalytic material is a transition metal oxide, a mixture of a carbon material and a transition metal oxide and/or a noble metal material or a mixture of a noble metal and a transition metal oxide and/or a carbon material, and the above active substances can play a very perfect synergistic catalytic effect. Specific examples of the transition metal oxide include, but are not limited to: at least one of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and tungsten oxide. Specific examples of the carbon material include, but are not limited to: at least one of fullerene, carbon fiber, Carbon Nanotube (CNT), carbon aerogel, graphene, and activated carbon. Specific examples of the noble metal material include, but are not limited to: at least one of gold, silver, ruthenium, rhodium, palladium, osmium, iridium, and platinum. When the active material in the dark catalyst material is a noble metal material, the noble metal material is loaded on a carrier and then put into use, wherein the carrier may be the transition metal oxide and/or the carbon material (in this case, the two materials play a role of both the active component and the carrier) or other carriers without catalytic activity. Further, when the active substance in the dark-colored catalyst material is a noble metal material, the weight ratio of the content of the noble metal to the total content of the other active substances and the carrier having no catalytic activity is preferably 1: (20-1000).
Preferably, the light source is selected from at least one of ultraviolet light, visible light, infrared light, or full spectrum sunlight.
Preferably, the light intensity of the light source is 100-1500mW/cm2。
The invention also provides the application of the catalytic system in organic waste gas purification.
The invention also provides a purification method of the organic waste gas, wherein the method comprises the step of carrying out photo-thermal catalytic degradation reaction or photo-thermal concerted catalytic degradation reaction on the organic waste gas to be purified in the presence of the catalytic system.
According to a preferred embodiment of the present invention, the method for purifying an organic waste gas includes the steps of:
dust removal: filtering the organic waste gas to be purified to remove particulate matters and viscous components in the organic waste gas;
gas adsorption: adsorbing and concentrating organic matters in the organic waste gas subjected to dust removal by using an adsorbing material;
catalytic degradation reaction: and carrying out photo-thermal catalytic degradation reaction or photo-thermal concerted catalytic degradation reaction on the organic waste gas subjected to gas adsorption concentration in the catalytic system.
Preferably, the purification method of organic exhaust gas further comprises a gas desorption step after the catalytic degradation reaction: returning at least part of tail gas obtained after the catalytic degradation reaction to the gas adsorption step, desorbing the saturated adsorption material by using the waste heat of the tail gas to realize the regeneration of the adsorption material, and introducing the desorbed concentrated organic matters into the catalytic system to carry out the catalytic degradation reaction again. At this time, if the exhaust gas residual heat cannot reach the desorption temperature of the adsorption material, the adsorption material can be desorbed by external heating. Wherein, the tail gas returned to the adsorption step accounts for more than 1/3 vol% of the total tail gas amount, preferably (1/2-2/3) vol%, and the rest part of the tail gas is discharged or enters the subsequent process. The gas desorption step can utilize tail gas waste heat (if necessary, can also be matched with extra heat source heating) to make the adsorption material realize desorption, organic matter realize concentration and go on simultaneously, or can omit this step, singly use extra heat source heating to make adsorption material realize desorption, organic matter realize concentration.
Preferably, the conditions of the catalytic degradation reaction include: the volume space velocity of the organic waste gas in the catalytic degradation reaction process is 10000-40000h-1。
Preferably, the adsorbent material is selected from at least one of activated carbon, zeolite molecular sieves, activated alumina, silica gel and resins.
Preferably, the adsorption concentration conditions include that the temperature of tail gas at the gas inlet is less than or equal to 60 ℃, and the volume space velocity of the organic waste gas is 10000--1The concentration of organic matters in the organic waste gas is less than or equal to 2000mg/m3。
In addition, the invention also provides a purification system, wherein the purification system comprises a filtering module, an adsorption module and a catalytic module which are sequentially communicated, an adsorption material is arranged in the adsorption module, the catalytic module is internally provided with the catalytic system, and organic waste gas to be purified is sequentially introduced into the filtering module, the adsorption module and the catalytic module so as to respectively carry out dust removal, gas adsorption and catalytic degradation reactions on the organic waste gas.
Preferably, one of the exhaust gas outlets of the catalytic module is in communication with the exhaust gas inlet of the adsorption module for returning at least part of the exhaust gas obtained after the catalytic degradation reaction to the adsorption module. When the tail gas temperature is not enough to provide the desorption heat of the adsorption material, so that the desorption process is completely supplied with heat by the additional heat source, the link can be omitted.
The catalytic system provided by the invention is improved on the basis of the existing catalytic mode, and consists of a dark catalytic material and a light source, wherein the light source is adopted to irradiate the surface of the dark catalytic material to spontaneously generate enough heat to initiate a thermal catalytic reaction, and when the concentration of organic components flowing into the catalytic system is increased and the temperature of a catalytic bed layer is high enough, even catalytic combustion can be initiated, so that the catalytic bed layer is self-ignited, external energy supply is not needed, the purification efficiency of organic waste gas can be improved, and high efficiency and energy conservation can be realized.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a schematic diagram of a specific structure of the purification system provided by the present invention.
Fig. 2 is another specific structural schematic diagram of the purification system provided by the invention.
Description of the reference numerals
1-a filtration module; 2-an adsorption module; 3-catalytic module
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative of the invention and is not to be construed as limiting the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
This example serves to illustrate the catalytic system and its use and purification method and purification system provided by the present invention.
As shown in fig. 1, the purification system adopted in this embodiment includes a filtering module 1, an adsorption module 2 and a catalytic module 3 which are sequentially communicated, the filtering module 1 is a dry filter, the adsorption module 2 is an adsorption column filled with an adsorption material (activated carbon), and a catalyst bed (Pt/MnO) is arranged in the catalytic module 32Wherein Pt is supported on MnO2Upper and Pt and MnO2The weight ratio of (1): 100) and the light intensity of the sunlight irradiating the catalyst bed layer is 1000mW/cm2And one tail gas outlet of the catalytic module 3 is communicated with the inlet of the adsorption module 2. When the purification system is used for purifying the organic waste gas, the specific steps are as follows:
(1) dust removal: the organic waste gas to be purified (originating from the tyre production plant, where the concentration of organic components is 2000 mg/m)3) At 4000m3The flow velocity of the/h is introduced into the dry filter by the induced draft fan to filter so as to remove particles and viscous components in the dry filter, and the adsorption period and the service life of the adsorption material in the adsorption module 2 are prolonged.
(2) Gas adsorption: the adsorbing material in the adsorption module 2 is utilized to adsorb the organic waste gas after dust removalThe organic matter is adsorbed, wherein the adsorption temperature is 40 ℃, and the volume space velocity of the adsorption is 40000h-1。
(3) Catalytic degradation reaction: so that the organic waste gas after gas adsorption passes through a catalyst bed layer in the catalytic module 3, and simultaneously the light source is turned on to carry out photo-thermal catalytic degradation reaction or photo-thermal concerted catalytic degradation reaction on the organic waste gas, wherein the volume space velocity of the organic waste gas is 40000h-1. The results show that the purification efficiency is greater than 90%.
(4) Gas desorption: and directly discharging a part (2/3 vol%) of the tail gas obtained after the catalytic degradation reaction or flowing the part into other working procedures, returning the rest part to the gas adsorption step, desorbing the saturated adsorption material by using the waste heat of the tail gas to realize the regeneration of the adsorption material, and introducing the desorbed concentrated organic matters into the catalytic module 3 for carrying out the catalytic degradation reaction again.
Example 2
This example serves to illustrate the catalytic system and its use and purification method and purification system provided by the present invention.
As shown in fig. 1, the purification system adopted in this embodiment includes a filtering module 1, an adsorption module 2 and a catalytic module 3 which are sequentially connected, the filtering module 1 is a dry filter, the adsorption module 2 is an adsorption column filled with an adsorption material (zeolite molecular sieve), and a catalyst bed (Pt/Al) is arranged in the catalytic module 32O3Wherein Pt is supported on Al2O3On and Pt and Al2O3The weight ratio of (1): 20) and the light intensity of the infrared light source irradiating the catalyst bed layer is 500W/cm2And one tail gas outlet of the catalytic module 3 is communicated with the tail gas inlet of the adsorption module 2. When the purification system is used for purifying the organic waste gas, the specific steps are as follows:
(1) dust removal: the organic waste gas to be purified (from the spraying workshop, wherein the concentration of organic components is 1000 mg/m)3) At 5000m3The flow velocity of the water is led into the dry filter by the induced draft fan to be filtered so as to remove the particles and the viscous components in the water, and the adsorption module 2 is prolongedThe adsorption period and the service life of the medium adsorption material.
(2) Gas adsorption: adsorbing organic matters in the organic waste gas subjected to dust removal by utilizing an adsorbing material in the adsorption module 2, wherein the adsorption temperature is 40 ℃, and the volume airspeed of adsorption is 10000h-1。
(3) Catalytic degradation reaction: so that the organic waste gas after gas adsorption passes through the catalyst bed layer in the catalytic module 3, and simultaneously the infrared light source is turned on to carry out photo-thermal catalytic degradation reaction or photo-thermal synergetic catalytic degradation reaction on the organic waste gas, wherein the volume airspeed of the organic waste gas is 10000h-1. The results show that the purification efficiency is greater than 90%.
(4) Gas desorption: and directly discharging a part (1/2 vol%) of the tail gas obtained after the catalytic degradation reaction or flowing the part into other processes, returning the rest part to the gas adsorption step, desorbing the saturated adsorption material by using high temperature to realize the regeneration of the adsorption material, and introducing the desorbed concentrated organic matters into the catalytic module 3 for carrying out the catalytic degradation reaction again.
Example 3
This example serves to illustrate the catalytic system and its use and purification method and purification system provided by the present invention.
As shown in fig. 1, the purification system adopted in this embodiment includes a filtering module 1, an adsorption module 2 and a catalytic module 3 which are sequentially communicated, the filtering module 1 is a dry filter, the adsorption module 2 is an adsorption column filled with an adsorption material (activated alumina), a catalyst bed layer (Pt/CNT, wherein Pt is loaded on CNT and a weight ratio of Pt to CNT is 1: 50) and a full spectrum sunlight, and a light intensity of the sunlight irradiating the catalyst bed layer is 800W/cm2And one tail gas outlet of the catalytic module 3 is communicated with the tail gas inlet of the adsorption module 2. When the purification system is used for purifying the organic waste gas, the specific steps are as follows:
(1) dust removal: the organic waste gas to be purified (originating from the tyre production plant, where the concentration of organic components is 2000 mg/m)3) At 5000m3Flow rate of/hThe induced draft fan is led into the dry filter for filtering so as to remove particles and viscous components in the dry filter, and the adsorption period and the service life of the adsorption material in the adsorption module 2 are prolonged.
(2) Gas adsorption: adsorbing organic matters in the organic waste gas subjected to dust removal by utilizing the adsorbing material in the adsorption module 2, wherein the adsorption temperature is 50 ℃, and the volume airspeed of adsorption is 20000h-1。
(3) Catalytic degradation reaction: so that the organic waste gas after gas adsorption passes through the catalyst bed layer in the catalytic module 3, and the light source is simultaneously turned on to carry out photo-thermal catalytic degradation reaction or photo-thermal synergetic catalytic degradation reaction on the organic waste gas, wherein the volume space velocity of the organic waste gas is 20000h-1. The results show that the purification efficiency is greater than 90%.
(4) Gas desorption: and directly discharging or flowing a part (2/3 vol%) of the tail gas obtained after the catalytic degradation reaction into other processes, returning the rest part to the gas adsorption step, heating the adsorption module to desorb the adsorption material so as to realize the regeneration of the adsorption material, and introducing the desorbed concentrated organic matters into the catalytic module 3 to perform the catalytic degradation reaction again.
Example 4
This example serves to illustrate the catalytic system and its use and purification method and purification system provided by the present invention.
As shown in fig. 2, the purification system adopted in the embodiment includes a filtering module 1, an adsorption module 2 and a catalytic module 3 which are sequentially communicated, the filtering module 1 is a dry filter, the adsorption module 2 is an adsorption column filled with an adsorption material (adsorption resin), and a catalyst bed layer (MnO) is arranged in the catalytic module 32) And the light intensity of the infrared light source irradiating the catalyst bed layer is 800W/cm2. When the purification system is used for purifying the organic waste gas, the specific steps are as follows:
(1) dust removal: the organic waste gas to be purified (originating from the tyre production plant, where the concentration of organic components is 300 mg/m)3) At 1000m3The flow velocity of/h is introduced into the dry filter by the induced draft fanThe filter is used for filtering to remove particles and viscous components in the adsorption module 2, and the adsorption period and the service life of the adsorption material in the adsorption module are prolonged.
(2) Gas adsorption: adsorbing organic matters in the organic waste gas subjected to dust removal by utilizing an adsorbing material in the adsorption module 2, wherein the adsorption temperature is 50 ℃, and the volume airspeed of adsorption is 10000h-1。
(3) Catalytic degradation reaction: so that the organic waste gas after gas adsorption passes through the catalyst bed layer in the catalytic module 3, and the light source is simultaneously turned on to carry out photo-thermal catalytic degradation reaction or photo-thermal synergetic catalytic degradation reaction on the organic waste gas, wherein the volume airspeed of the organic waste gas is 10000h-1. The results show that the purification efficiency is greater than 90%.
(4) Gas desorption: directly discharging or flowing the tail gas obtained after the catalytic degradation reaction into other processes, heating the adsorption module to desorb the adsorption material so as to realize the regeneration of the adsorption material, and introducing the desorbed concentrated organic matters into the catalytic module 3 to perform the catalytic degradation reaction again.
Example 5
This example serves to illustrate the catalytic system and its use and purification method and purification system provided by the present invention.
The organic waste gas was purified according to the method of example 1, except that the steps of dust removal, gas adsorption and gas desorption were not included, and the purification efficiency was more than 80%.
Comparative example 1
This comparative example serves to illustrate a reference catalytic system and its use and purification method and purification system.
The organic waste gas was purified according to the method of example 4, except that only the dark color catalytic material was included in the catalytic system without the light source, and the purification efficiency was less than 20%.
Comparative example 2
This comparative example serves to illustrate a reference catalytic system and its use and a method for purifying organic waste gases.
Organic waste gas purification according to the method of example 4Except that the catalytic system only comprises the light intensity of 800mW/cm2The infrared light source does not comprise a dark catalytic material, and the purification efficiency is less than 10 percent.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (4)

1. A method for purifying an organic exhaust gas, characterized by comprising the steps of:
dust removal: filtering the organic waste gas to be purified to remove particulate matters and viscous components in the organic waste gas;
gas adsorption: adsorbing and concentrating organic matters in the organic waste gas subjected to dust removal by using an adsorbing material; the adsorption concentration conditions comprise that the temperature of tail gas at the gas inlet is less than or equal to 60 ℃, and the volume space velocity of the organic waste gas is 10000-40000h-1The concentration of organic matters in the organic waste gas is less than or equal to 2000mg/m3；
Catalytic degradation reaction: carrying out photo-thermal catalytic degradation reaction or photo-thermal concerted catalytic degradation reaction on the organic waste gas subjected to gas adsorption concentration in the presence of a purification system;
returning at least part of tail gas obtained after the catalytic degradation reaction to the gas adsorption step, desorbing the saturated adsorption material by using the waste heat of the tail gas to realize the regeneration of the adsorption material, and introducing the desorbed concentrated organic matters into the catalytic system to perform the catalytic degradation reaction again;
the purification system comprises a filtering module (1), an adsorption module (2) and a catalytic module (3) which are sequentially communicated, wherein an adsorption material is arranged in the adsorption module (2), a catalytic system is arranged in the catalytic module (3), and organic waste gas to be purified is sequentially introduced into the filtering module (1), the adsorption module (2) and the catalytic module (3) to respectively carry out dust removal, gas adsorption and catalytic degradation reactions on the organic waste gas;
the catalytic system consists of a dark catalytic material and a light source, wherein the light source irradiates on the dark catalytic material to generate enough heat to initiate a thermal catalytic reaction or a photo-thermal synergetic catalytic reaction;
the active substance in the dark-color catalytic material is a mixture of noble metal, transition metal oxide and carbon material;
the transition metal oxide is selected from at least one of manganese oxide, cobalt oxide, nickel oxide and tungsten oxide;
the carbon material is selected from at least one of fullerene, carbon fiber, carbon nanotube, carbon aerogel, graphene and activated carbon;
the noble metal material is at least one selected from gold, silver, ruthenium, rhodium, palladium, osmium, iridium and platinum;
the weight ratio of the content of the noble metal to the total content of the other active substances and the catalytically inactive support is 1: (20-1000);
the light source is selected from at least one of ultraviolet light, visible light, infrared light and full spectrum sunlight; the light intensity of the light source is 800-1500mW/cm2；
The adsorbing material is selected from at least one of activated carbon, zeolite molecular sieve, activated alumina, silica gel and resin.
2. The purification method according to claim 1, wherein when the residual heat of the tail gas cannot reach the desorption temperature of the adsorption material, the tail gas is desorbed by external heating.
3. The purification method according to claim 1 or 2, wherein the conditions of the catalytic degradation reaction comprise: the volume space velocity of the organic waste gas in the catalytic degradation reaction process is 10000-40000h-1 。
4. A purification method according to claim 1, wherein one of the exhaust gas outlets of the catalytic module (3) communicates with the exhaust gas inlet of the adsorption module (2) for returning at least part of the exhaust gas obtained after the catalytic degradation reaction into the adsorption module (2).
CN201810896699.2A 2018-08-08 2018-08-08 Catalytic system, application thereof, purification method and purification system Active CN109011868B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810896699.2A CN109011868B (en) 2018-08-08 2018-08-08 Catalytic system, application thereof, purification method and purification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810896699.2A CN109011868B (en) 2018-08-08 2018-08-08 Catalytic system, application thereof, purification method and purification system

Publications (2)

Publication Number Publication Date
CN109011868A CN109011868A (en) 2018-12-18
CN109011868B true CN109011868B (en) 2021-12-24

Family

ID=64649630

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810896699.2A Active CN109011868B (en) 2018-08-08 2018-08-08 Catalytic system, application thereof, purification method and purification system

Country Status (1)

Country Link
CN (1) CN109011868B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111111434B (en) * 2020-01-15 2022-06-07 上海第二工业大学 Equipment for catalytic degradation of VOCs gas through infrared heating
CN113522014A (en) * 2020-04-21 2021-10-22 中国科学院广州能源研究所 Method for rapidly treating high-concentration organic gas by photocatalytic coupling catalytic combustion
CN112452093A (en) * 2020-08-18 2021-03-09 陕西清水川能源股份有限公司 Method for purifying waste gas containing solid dust and liquid drops
CN114522500A (en) * 2020-11-23 2022-05-24 中国科学院城市环境研究所 Deodorization and sterilization equipment and method and application for purifying gas by using same
CN112973674B (en) * 2021-02-25 2022-11-25 华东理工大学 Preparation method and application of inverse opal structure photo-thermal catalyst TixMn1-xOy
CN117547970B (en) * 2024-01-12 2024-04-02 广东海洋大学 Photo-thermal catalysis ship exhaust gas treatment method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102188875A (en) * 2011-03-25 2011-09-21 天津赛智科技发展有限公司 Energy-saving high-efficiency purification system for industrial volatilizable organic pollutant
CN106975481A (en) * 2017-04-22 2017-07-25 武汉理工大学 The preparation method of alkaline earth metal doping MnO2 catalyst with efficient photo-thermal concerted catalysis purifying VOCs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5582545B2 (en) * 2009-10-20 2014-09-03 独立行政法人産業技術総合研究所 Photocatalyst containing carbon nitride, method for producing the same, and air purification method using the photocatalyst
CN101856618B (en) * 2010-05-18 2012-03-07 武汉理工大学 Method for preparing platinum/semiconductor oxide catalyst having photo-thermal synergistic effect
CN102744065B (en) * 2012-07-19 2014-10-01 福州大学 Catalyst with optothermal coupling effect and preparation method thereof
CN108786789A (en) * 2017-05-04 2018-11-13 中国科学院城市环境研究所 The different carbon material supported photic thermocatalytic purifying VOCs of platinum

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102188875A (en) * 2011-03-25 2011-09-21 天津赛智科技发展有限公司 Energy-saving high-efficiency purification system for industrial volatilizable organic pollutant
CN106975481A (en) * 2017-04-22 2017-07-25 武汉理工大学 The preparation method of alkaline earth metal doping MnO2 catalyst with efficient photo-thermal concerted catalysis purifying VOCs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"锰基复合金属氧化物催化燃烧VOCs的研究进展";潘静等;《四川化工》;20180630;20-22 *

Also Published As

Publication number Publication date
CN109011868A (en) 2018-12-18

Similar Documents

Publication Publication Date Title
CN109011868B (en) Catalytic system, application thereof, purification method and purification system
CN207928947U (en) Furniture lacquer spraying waste gas processing unit
CN106807177A (en) The gas cleaning plant and purification method of a kind of removing VOCs
CN204073781U (en) A kind of modularization organic waste gas purifying treatment system
CN1951544A (en) Method and apparatus for photochemical degradation of organic gas
KR102136290B1 (en) Low Energy Consumption Concentrating Rotor For Treating Malodor And VOCs Gases, And Treating System Comprising The Same
CN109999624A (en) The integration apparatus of adsoption catalysis coupling processing acid waste gas and organic exhaust gas
CN104984638A (en) Multiple effect integrated waste gas purification system
CN109414647B (en) Method for low-temperature gas cleaning and catalyst used for method
CN207430043U (en) A kind of photocatalysis coupled exhaust air adsorbing purification device of low temperature
EP2548640A1 (en) Method and device for treating gas discharged from a carbon dioxide recovery device
CN206094118U (en) An organic waste gas purifier
CN209917632U (en) Low concentration VOCs organic waste gas purifying equipment
KR100469005B1 (en) Photocatalytic system for the removal of volatile organic compounds
JP2008188492A (en) Water treatment system
CN202146710U (en) Phosphine gas purifier
CN106039995A (en) Integrated VOCs adsorption concentration-catalytic oxydative degradation turning wheel device and process thereof
CN206082107U (en) Industry organic waste gas purification device
CN205815478U (en) A kind of photocatalysis air cleaning device
CN210385398U (en) Integrated equipment for treating acidic waste gas and organic waste gas by adsorption and catalysis coupling
CN2915236Y (en) An apparatus for photochemical degradation of organic gas
CN111298591A (en) Biological carbon photocatalysis waste gas treatment technical device
CN113499683B (en) VOC (volatile organic compound) based on catalytic oxidation s Composite processing system and method
CN106861393B (en) Fermentation tail gas purification treatment method
CN207221692U (en) Light helps activated carbon adsorption processing 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