CN205269406U - Simple and easy VOCs catalytic oxidation treater - Google Patents

Abstract

The utility model discloses a simple and easy VOCs catalytic oxidation treater, detect the controller including organic waste gas import, waste gas heat exchanger, electrical heating rod, treater upper cover plate, air baffle, catalyst bed, catalyst support sieve, organic waste gas export, waste gas import concentration detection controller, catalyst bed inlet temperature, the lower part in simple and easy VOCs catalytic oxidation treater one side is settled in the organic waste gas import to link to each other with the cold side import of waste gas heat exchanger, the cold side export of waste gas heat exchanger links to each other with simple and easy VOCs catalytic oxidation treater's the zone of heating, sets up electrical heating rod in the zone of heating and heats waste gas, crossing the air baffle through the air current of heating and getting into the catalyst bed, the catalyst bed is placed on the catalyst supports the sieve, and hot side -entrance that the air current passes through to get into the waste gas heat exchanger behind catalyst bed and the catalyst support sieve is from the heat side export of waste gas heat exchanger back from the organic waste gas export emission of flowing out.

Description

A kind of simple and easy VOCs catalytic oxidation treatment device

Technical field

The utility model relates to a kind of catalyzing, oxidizing and purifying method containing VOCs gas, belongs to catalysis, waste gas pollution control and treatment and environmental protection technical field.

Background technology

VOCs is the abbreviation of volatile organic matter, it is considered that boiling point can be considered as VOCs lower than the organism of 250 DEG C, and air can be polluted by its vapor-dispersing in air. At present, all there is VOCs to a certain degree and pollute in the industry such as spraying, pharmacy, tanning, coating, shoemaking, toy, circuit card, magneticsubstance and chemical industry that China extensively exists form, wherein comparatively serious with the Yangtze River Delta, Pearl River Delta. The topsoil in these two regions is changed into VOCs, O from SOx, NOx pattern₃With secondary organic aerosol pattern, it is very necessary and urgent for therefore carrying out the tail gas containing VOCs effectively administering efficiently.

The Treatment process of VOCs is very various, for the valuable VOCs of high density, use the method that condensation is reclaimed, this technique is for the petroleum vapor recovery of petroleum chemical enterprise and service station, and achieve good effect, but for be worth not high and concentration not too high containing VOCs gas, then cost is too high for this kind of method, very uneconomical. for high density without recovery value VOCs, the method of heat-accumulation combustion/heat-storage catalytic burning (RTO/RCO) can be adopted, the method uses two Room, the accumulation of heat of three Room or many rooms or heat-storage catalytic burner, make, containing VOCs gas, high temperature oxidation occurs wherein, the heat produced retains in heat-accumulation combustor by frequently switching air flow line, for the waste gas of high VOCs concentration, this kind of method can realize self-heating completely and run, there is extraordinary effect, but gas flow and VOCs concentration be there are certain requirements by the method, and too great fluctuation process can not be there is in VOCs concentration and tolerance, the too low then device of VOCs concentration can not self-heating, and VOCs excessive concentration has the possibility blasted.

In addition, adopt charcoal absorption to be also one of common method that VOCs administers, the defect of the method be the gac of practical application because the impact of the factors such as steam is easy to saturated, the hot steam after gac is saturated regenerates easy presence of fire; When gac processes with giving up as danger after useless, processing cost is expensive thereafter. The improvement of a lot of industry VOCs at present adopts zeolite runner to increase dense method, lower concentration VOCs is brought up to rational concentration, lead to into RTO/RCO device again, realize the improvement of waste gas, this kind of method has widened the range of application of RTO/RCO method greatly, but this is only huge at exhausted air quantity, waste gas operating mode could successfully use stable.

Adopt the method for absorbing liquid absorption can also process VOCs gas, but VOCs gas often oleophylic, in order to improve solvability, usually needs in absorbing liquid to add tensio-active agent, wastewater treatment is brought difficulty by this, and this kind of method is difficult to VOCs to be reduced to very low concentration in addition. Current Biochemical method there has also been further investigation containing VOCs gas, and has had full scale plant to come into operation, and the method is with low cost, but is difficult to deal with exhaust gas flow equally and concentration has the situation of larger fluctuation.

China exists at present in a large number and the industries such as widely-dispersed small item manufacture, application, toy, shoemaking all exist feature narrow-minded, that VOCs is seriously polluted, exhaust gas concentration changes greatly, not easily centralized collection processes, these industries need the miniaturization treatment unit of a kind of simple, efficient quick to process VOCs discharge very much, and this is exactly the novel basic problem to be solved of this use.

Practical novel content

The purpose of this utility model is to be realized fast the waste gas pollution control and treatment of VOCs emission source by a kind of device simple, compact, efficient.

The purpose of this utility model is realized by following technical scheme: a kind of simple and easy VOCs catalytic oxidation treatment device, it is characterised in that: comprise cover plate on organic exhaust gas inlet, spent air heat exchanger, electrically heated rod, treater, air-flow dividing plate, beds, catalyzer supporting screening plate, organic exhaust gas outlet, exhaust gas inlet Concentration Testing controller, beds inlet temperature detection control device; Described organic exhaust gas import is placed in the bottom of the side of this simple and easy VOCs catalytic oxidation treatment device, and is connected with the cold side import of spent air heat exchanger; The cold side outlet of spent air heat exchanger is connected with the heating zone of this simple and easy VOCs catalytic oxidation treatment device, arranges electrically heated rod waste gas is carried out heat temperature raising in heating zone; Off-gas flows through heating is crossed air-flow dividing plate and is entered beds, beds is positioned on catalyzer supporting screening plate, air-flow, by entering the hot side import of spent air heat exchanger after beds and catalyzer supporting screening plate, discharges from organic exhaust gas outlet after flowing out from the hot side outlet of spent air heat exchanger.

Described spent air heat exchanger is plate-type heat exchanger, the hot side conveying processed waste gas of high temperature of interchanger, the shell side transporting low temperature import organic exhaust gas of interchanger.

Described electrically heated rod is smooth heating rod or the heating rod with fin, and the terminal stud of heating rod is placed in outside the thermal insulation layer of this simple and easy VOCs catalytic oxidation treatment device.

The ceramic honeycomb catalyst that described beds is parallel to air flow line by duct is piled up, and the composition of ceramic honey comb is aluminium sesquioxide, silicon-dioxide, mullite, trichroite or SiC ceramic.

The catalyst activity component of described beds is LaAlO₃��La_1��0.5Sr_0��0.5MnO_3+x��La_1��0.5Ba_0��0.5MnO_3+x��LaCu_0��0.5Mn_1��0.5O_3+x��LaCu_0��0.5Co_1��0.5O_3+x��LaCu_0��0.5Fe_1��0.5O_3+x��LaCu_0��0.5Ni_1��0.5O_3+x��LaCo_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaCo_{0.01��0.99}Mn_{0.99��0.01}O_3+x��LaMn_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaMn_{0.01��0.99}Ni_{0.99��0.01}O_3+x��LaNi_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaNi_{0.01��0.99}Co_{0.99��0.01}O_3+x��La_{0.99��0.8}Ce_{0.01��0.2}FeO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}MnO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}CoO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}NiO_3+x��CoAl₂O₄��Mn_{0.01��0.8}Ce_{0.99��0.2}Ox��Fe_{0.01��0.8}Ce_{0.99��0.2}O_x��Co_{0.01��0.8}Ce_{0.99��0.2}Ox��Cu_{0.01��0.8}Ce_{0.99��0.2}Ox��Ni_{0.01��0.8}Ce_{0.99��0.2}Ox or Pt.

The apparatus surface that described VOCs catalytic oxidation treatment device contacts with air is provided with thermal insulation layer, reduces treater and scatters and disappears to the heat of environment.

Exhaust gas inlet Concentration Testing controller is installed by the organic exhaust gas ingress of described simple and easy VOCs catalytic oxidation treatment device; the concentration of VOCs in waste gas is detected in real time; when VOCs concentration in waste gas higher than corresponding VOCs limits of explosion 80% time, the exhaust gas concentration detection control whole treater of device interlocked control and external air transporting arrangement are shut down.

The airflow inlet place of the beds of described simple and easy VOCs catalytic oxidation treatment device is provided with temperature detection controller, the gas flow temperature entering beds is detected, the power of the detected value control electrically heated rod according to temperature, with ensure to enter beds gas flow temperature in rational temperature range.

Specifically: system of the present utility model adopts electrically heated rod to be heated by organic exhaust gas, efficient quick, easily realize driving fast and stopping, treater realizes the oxidation removal of VOCs component by the effect of catalyzer, the heat release of electrically heated heat and VOCs oxidation makes spent air temperture raise, this high-temp waste gas is then used for preheating and enters the low temperature organic exhaust gas of treater, realize energy-conservation and consumption reduction, with the exhaust gas emission air after low temperature organic exhaust gas heat exchange, this device effectively combines the function of catalytic oxidizing equipment and heat exchanger, structure is simple, it is applicable to very much the quick improvement of small-sized VOCs point source.

Accompanying drawing explanation

Figure-1 is the schematic diagram of the utility model system. Wherein 1 is organic exhaust gas import; 2 exhaust gas inlet Concentration Testing controllers, when the VOCs concentration that this detection control device detects higher than this VOCs gas Lower Explosive Limit 80% time, this detection control whole treater of device interlocked control and external air transporting arrangement are shut down; 3 is spent air heat exchanger, its cold side flowing be without heating and catalytic oxidation treatment organic exhaust gas, and hot side flowing be through heating and catalytic oxidation treatment after waste gas; 4 is the terminal stud of electrically heated rod; 5 is electrically heated rod; 6 is air-flow dividing plate; 7 is cover plate on treater; 8 is beds inlet temperature detection control device; 9 is beds; 10 is catalyzer supporting screening plate; 11 is treater external thermal insulation; 12 is organic exhaust gas outlet; 13 is off-gas flows streamline. Although figure-1 gives the situation of five electrically heated rods in side, but the electrically heated rod quantity of waste gas heating zone of the present utility model is not construed as limiting by this, when device size and space allow, the quantity of the electrically heated rod of waste gas heating zone can be selected arbitrarily. In addition, although the heating rod in figure-1 is U-shaped smooth heating rod, but heating rod form of the present utility model is not construed as limiting by this, and the heating rod of surface fin and the heating rod of other shapes are also completely passable.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further:

A kind of simple and easy VOCs catalytic oxidation treatment device, comprises cover plate 7 on organic exhaust gas inlet 1, spent air heat exchanger 3, electrically heated rod 5, treater, air-flow dividing plate 6, beds 9, catalyzer supporting screening plate 10, organic exhaust gas outlet 12, exhaust gas inlet Concentration Testing controller 2, beds inlet temperature detection control device 8; Described organic exhaust gas import 1 is placed in the bottom of the side of this simple and easy VOCs catalytic oxidation treatment device, and is connected with the cold side import of spent air heat exchanger 3; The cold side outlet of spent air heat exchanger 3 is connected with the heating zone of this simple and easy VOCs catalytic oxidation treatment device, arranges electrically heated rod 5 waste gas is carried out heat temperature raising in heating zone; Off-gas flows through heating is crossed air-flow dividing plate 6 and is entered beds 9, beds 9 is positioned on catalyzer supporting screening plate 10, air-flow, by entering the hot side import of spent air heat exchanger 3 after beds 9 and catalyzer supporting screening plate 10, exports 12 discharge air from organic exhaust gas after flowing out from the hot side outlet of spent air heat exchanger 3;

Described waste gas heatable catalytic oxidizer 13 is one or more Vertically tube arranged in parallel, every root circle pipe internal space is a waste gas heatable catalytic oxidizing chamber, circle pipe diameter is between 3cm��10cm, length is between 20cm��100cm, every root circle pipe axis place settles a heating rod, heating rod length is identical with Vertically tube and electrified regulation, the inner filler particles shape catalyzer of circle pipe, the organic exhaust gas through spent air heat exchanger 20 preheating entered from top waste gas heatable catalytic oxidizer 13 by heating and carry out catalyzed oxidation on granules of catalyst surface, high-temperature gas after catalyzed oxidation enters the hot side pipe journey import of spent air heat exchanger 20 by treater lower chambers 17, treater lower chambers 17 is entered from the outlet of hot side pipe journey by the Guan Chenghou of spent air heat exchanger, and export 4 discharges by organic exhaust gas,

Described spent air heat exchanger is plate-type heat exchanger, the hot side conveying processed waste gas of high temperature of interchanger, the shell side transporting low temperature import organic exhaust gas of interchanger. Described electrically heated rod is smooth heating rod or the heating rod with fin, and the terminal stud of heating rod is placed in outside the thermal insulation layer of this simple and easy VOCs catalytic oxidation treatment device. The ceramic honeycomb catalyst that described beds is parallel to air flow line by duct is piled up, and the composition of ceramic honey comb is aluminium sesquioxide, silicon-dioxide, mullite, trichroite or SiC ceramic. The catalyst activity component of described beds is LaAlO₃��La_1��0.5Sr_0��0.5MnO_3+x��La_1��0.5Ba_0��0.5MnO_3+x��LaCu_0��0.5Mn_1��0.5O_3+x��LaCu_0��0.5Co_1��0.5O_3+x��LaCu_0��0.5Fe_1��0.5O_3+x��LaCu_0��0.5Ni_1��0.5O_3+x��LaCo_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaCo_{0.01��0.99}Mn_{0.99��0.01}O_3+x��LaMn_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaMn_{0.01��0.99}Ni_{0.99��0.01}O_3+x��LaNi_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaNi_{0.01��0.99}Co_{0.99��0.01}O_3+x��La_{0.99��0.8}Ce_{0.01��0.2}FeO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}MnO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}CoO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}NiO_3+x��CoAl₂O₄��Mn_{0.01��0.8}Ce_{0.99��0.2}Ox��Fe_{0.01��0.8}Ce_{0.99��0.2}O_x��Co_{0.01��0.8}Ce_{0.99��0.2}Ox��Cu_{0.01��0.8}Ce_{0.99��0.2}Ox��Ni_{0.01��0.8}Ce_{0.99��0.2}Ox or Pt.

Exhaust gas inlet Concentration Testing controller is installed by the organic exhaust gas ingress of described simple and easy VOCs catalytic oxidation treatment device; the concentration of VOCs in waste gas is detected in real time; when VOCs concentration in waste gas higher than corresponding VOCs limits of explosion 80% time, the exhaust gas concentration detection control whole treater of device interlocked control and external air transporting arrangement are shut down. The airflow inlet place of the beds of described simple and easy VOCs catalytic oxidation treatment device is provided with temperature detection controller, the gas flow temperature entering beds is detected, the power of the detected value control electrically heated rod according to temperature, with ensure to enter beds gas flow temperature in rational temperature range.

The apparatus surface that described VOCs catalytic oxidation treatment device contacts with air is provided with thermal insulation layer, reduces treater and scatters and disappears to the heat of environment.

When present processor runs, organic exhaust gas enters in spent air heat exchanger by organic exhaust gas import, waste gas heating zone is entered from the cold side outlet of spent air heat exchanger after preheating, in waste gas heating zone, it is electrically heated rod is heated to optimal temperature, then beds is entered after bypassed air flow dividing plate, complete catalyzed oxidation wherein, through the high-temperature gas of catalyzed oxidation by entering the hot side import of spent air heat exchanger after beds and catalyzer supporting screening plate, and the undressed organic exhaust gas of the cold side of spent air heat exchanger is carried out preheating, waste gas through heat recuperation from the hot side outlet outflow of spent air heat exchanger and discharges air from organic exhaust gas outlet.

The flow of the waste gas heatable catalytic oxidizer of described VOCs catalytic oxidation treatment device is: tolerance per hour equals 2000��30000 times of beds volume, compared with common VOCs treatment unit, this device opens, it is convenient and swift to stop, thermo-efficiency height, fully, applicable little flow and concentration have the VOCs gas processing of fluctuation in VOCs degraded. when the particulate alumina that the catalyzer in catalytic oxidation treatment device is supporting Pt, the temperature control of catalytic oxidation treatment device is formed on 250 DEG C can be made containing benzene, toluene, the gas concentration of dimethylbenzene reduces by more than 98%, when using perovskite catalyzer in the middle of catalytic oxidation treatment device, the temperature of catalytic oxidation treatment device controls can make containing benzene at 400 DEG C, toluene, the gas concentration of dimethylbenzene reduces by more than 95%, in addition this device is for alcohol class, aldehyde ketone, the organism such as alkane also have good regulation effect, also process it is applicable to very much containing butyraldehyde, suceinic aldehyde, the process of the stench class organic exhaust gas of valeral.

In addition, through this device expellant gas temperature higher than normal temperature 10��50 DEG C, it is possible to be used for the workpiece after application is carried out drying and processing, it is also possible to heated by factory building in winter.

Claims (8)

1. a simple and easy VOCs catalytic oxidation treatment device, it is characterised in that: comprise cover plate on organic exhaust gas inlet, spent air heat exchanger, electrically heated rod, treater, air-flow dividing plate, beds, catalyzer supporting screening plate, organic exhaust gas outlet, exhaust gas inlet Concentration Testing controller, beds inlet temperature detection control device; Described organic exhaust gas import is placed in the bottom of the side of this simple and easy VOCs catalytic oxidation treatment device, and is connected with the cold side import of spent air heat exchanger; The cold side outlet of spent air heat exchanger is connected with the heating zone of this simple and easy VOCs catalytic oxidation treatment device, arranges electrically heated rod waste gas is carried out heat temperature raising in heating zone; Off-gas flows through heating is crossed air-flow dividing plate and is entered beds, beds is positioned on catalyzer supporting screening plate, air-flow, by entering the hot side import of spent air heat exchanger after beds and catalyzer supporting screening plate, discharges from organic exhaust gas outlet after flowing out from the hot side outlet of spent air heat exchanger.

2. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1, it is characterised in that: described spent air heat exchanger is plate-type heat exchanger, the hot side conveying processed waste gas of high temperature of interchanger, the shell side transporting low temperature import organic exhaust gas of interchanger.

3. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1, it is characterized in that: described electrically heated rod is smooth heating rod or the heating rod with fin, the terminal stud of heating rod is placed in outside the thermal insulation layer of this simple and easy VOCs catalytic oxidation treatment device.

4. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1, it is characterized in that: the ceramic honeycomb catalyst that described beds is parallel to air flow line by duct is piled up, the composition of ceramic honey comb is aluminium sesquioxide, silicon-dioxide, mullite, trichroite or SiC ceramic.

5. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1, it is characterised in that: the catalyst activity component of described beds is LaAlO₃��La_1��0.5Sr_0��0.5MnO_3+x��La_1��0.5Ba_0��0.5MnO_3+x��LaCu_0��0.5Mn_1��0.5O_3+x��LaCu_0��0.5Co_1��0.5O_3+x��LaCu_0��0.5Fe_1��0.5O_3+x��LaCu_0��0.5Ni_1��0.5O_3+x��LaCo_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaCo_{0.01��0.99}Mn_{0.99��0.01}O_3+x��LaMn_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaMn_{0.01��0.99}Ni_{0.99��0.01}O_3+x��LaNi_{0.01��0.99}Fe_{0.99��0.01}O_3+x��LaNi_{0.01��0.99}Co_{0.99��0.01}O_3+x��La_{0.99��0.8}Ce_{0.01��0.2}FeO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}MnO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}CoO_3+x��La_{0.99��0.8}Ce_{0.01��0.2}NiO_3+x��CoAl₂O₄��Mn_{0.01��0.8}Ce_{0.99��0.2}Ox��Fe_{0.01��0.8}Ce_{0.99��0.2}O_x��Co_{0.01��0.8}Ce_{0.99��0.2}Ox��Cu_{0.01��0.8}Ce_{0.99��0.2}Ox��Ni_{0.01��0.8}Ce_{0.99��0.2}Ox or Pt.

6. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1, it is characterised in that: the apparatus surface that described VOCs catalytic oxidation treatment device contacts with air is provided with thermal insulation layer, reduces treater and scatters and disappears to the heat of environment.

7. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1; it is characterized in that: exhaust gas inlet Concentration Testing controller is installed by the organic exhaust gas ingress of described simple and easy VOCs catalytic oxidation treatment device; the concentration of VOCs in waste gas is detected in real time; when VOCs concentration in waste gas higher than corresponding VOCs limits of explosion 80% time, the exhaust gas concentration detection control whole treater of device interlocked control and external air transporting arrangement are shut down.

8. a kind of simple and easy VOCs catalytic oxidation treatment device as claimed in claim 1, it is characterized in that: the airflow inlet place of the beds of described simple and easy VOCs catalytic oxidation treatment device is provided with temperature detection controller, the gas flow temperature entering beds is detected, the power of the detected value control electrically heated rod according to temperature, with ensure to enter beds gas flow temperature in rational temperature range.