CN103463929B - Stripping system used for treating industrial volatile organic pollutants - Google Patents
Stripping system used for treating industrial volatile organic pollutants Download PDFInfo
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- CN103463929B CN103463929B CN201310452068.9A CN201310452068A CN103463929B CN 103463929 B CN103463929 B CN 103463929B CN 201310452068 A CN201310452068 A CN 201310452068A CN 103463929 B CN103463929 B CN 103463929B
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Abstract
The invention relates to a stripping system used for treating industrial volatile organic pollutants. The stripping system is characterized by comprising a catalytic air intake heater, a catalytic bed, a catalytic fan, a heat exchanger, an adsorption bed, a stripping gas circulation fan, a stripping gas circulation heater and an adsorption bed stripping heater. An industrial volatile organic pollutant waste gas inlet, a purified gas outlet, a stripping waste gas outlet, a stripping gas inlet, a stripping gas circulation outlet and a stripping gas circulation inlet are formed in the adsorption bed. The heat exchanger is provided with a catalytic tail gas inlet, a catalytic tail gas outlet, a catalytic gas inlet, a catalytic gas outlet, a stripping gas feeding inlet and a stripping gas feeding outlet. The stripping system effectively improves thermal efficiency of treatment, reduces heat loss and improves heat recovery utilization rate; in the burning process, the temperature in a catalytic burning bed of the stripping system is more even, burning efficiency and a purifying rate are improved, heat exchange is increased, heat energy is utilized more reasonably, and the requirements for energy conservation and emission reduction are met.
Description
Technical field
The invention belongs to desorption system field, especially a kind of desorption system for the treatment of industrial volatile organic pollutants.
Background technology
In the desorption system of current process industrial volatile organic pollutants, capital equipment comprises catalytic bed, catalytic bed makes building enclosure by heat resisting steel sheet material or industrial furnace building material usually, in its existing catalytic combustion bed structure, air inlet and air outlet are located at the two ends up and down of catalytic combustion bed, although existing structure can realize catalytic combustion, but there are the following problems: 1, the thermal losses of catalytic combustion pool furnace body structure own is large, and recuperation of heat utilization ratio is lower; 2, non-uniform temperature in catalytic combustion pool furnace body structure, overall high in centre temperature, edge temperature is low, reduce industrial volatile organic pollutants efficiency of combustion, affect the purifying rate of catalytic combustion, 3, energy-saving effect is poor, do not meet energy-saving and emission-reduction requirement, in desorption process, adsorbent bed desorption gas concentration can not well control in addition, affects catalytic combustion efficiency and heat utilization rate.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of desorption system for the treatment of industrial volatile organic pollutants is provided, this desorption system effectively improves the thermal efficiency of process, reduce thermal losses, improve recuperation of heat utilization rate, in catalytic combustion bed during burning in desorption system, temperature is more even, improve efficiency of combustion and purifying rate, add heat exchange Appropriate application heat energy more, meet energy-saving and emission-reduction requirement, the gas temperature of input catalytic bed can effectively control.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of desorption system for the treatment of industrial volatile organic pollutants, it comprises catalysis air intake heater, catalytic bed, catalysis blower fan, heat exchanger, adsorbent bed, desorption gas circulating fan, desorption gas recirculation heater and adsorbent bed desorption heater, adsorbent bed is provided with industrial volatile organic pollutants exhaust gas inlet, purified gas outlet, desorption waste gas delivery outlet, desorption gas input port, desorption gas loop exit and desorption gas loop head, heat exchanger is provided with catalytic exhaust entrance, catalytic exhaust exports, the import of catalysis gas, catalysis gas exports, supply gas entrance and desorption of desorption is supplied gas outlet, desorption gas loop exit connects desorption gas recirculation heater air inlet by pipeline, this desorption gas recirculation heater air outlet connects desorption gas circulating fan air inlet by pipeline, this desorption gas circulating fan air outlet connects the desorption gas loop head on adsorbent bed by pipeline, the desorption gas loop exit of heat exchanger and desorption gas loop head are connected on the pipeline between desorption gas recirculation heater and desorption gas circulating fan respectively by pipeline, the catalysis gas outlet of heat exchanger connects the catalytic exhaust entrance of heat exchanger by catalysis air intake heater and catalytic bed, catalytic exhaust outlet connects the desorption gas entrance of adsorbent bed by adsorbent bed desorption heater, the catalysis gas import of heat exchanger connects the desorption waste gas delivery outlet of adsorbent bed by catalysis blower fan.
And, described catalytic bed comprises airscoop shroud, body of heater, air leaving cover, body of heater upper end is fixedly mounted with airscoop shroud, body of heater lower end is fixedly mounted with air leaving cover, body of heater comprises upper head plate that body of heater peripheral board and its upper end be fixedly mounted with and the bottom plate that its lower end is fixedly mounted with, evenly heat-insulation layer is fixed with at body of heater peripheral board outer wall, coaming plate in one body of heater is set in body of heater peripheral board, air intake duct and gas off-take is arranged alternately between coaming plate and body of heater peripheral board in body of heater, the import of air intake duct is arranged on upper head plate, the outlet of air intake duct to be arranged in bottom plate and body of heater between coaming plate, the import of gas off-take to be arranged in upper head plate and body of heater between coaming plate, the outlet of gas off-take is arranged on bottom plate, air inlet kuppe is provided with above in the middle part of the upper head plate of corresponding airscoop shroud import, combustion gas kuppe is provided with on below in the middle part of upper head plate, catalytic bed heater is provided with in the body of heater that air intake port is corresponding, kuppe of giving vent to anger is provided with below in the middle part of the bottom plate that corresponding air leaving cover exports, airscoop shroud connects catalysis air intake heater, air leaving cover connects catalytic exhaust entrance.
And described air intake duct is identical with the quantity of gas off-take and to be evenly alternately arranged in body of heater between coaming plate and body of heater peripheral board.
And described air inlet kuppe is positive rectangular pyramid structure, combustion gas kuppe and kuppe of giving vent to anger are inverted positive rectangular pyramid structure.
And described air intake duct adopts rectangular steel pipe and is arranged in body of heater peripheral board and body of heater between coaming plate, gas off-take is surrounded by coaming plate in the air intake duct rectangle steel tube wall of its both sides, body of heater peripheral board and body of heater.
And, be provided with catalyst bracket in the body of heater above described heater, on catalyst bracket, catalyst layer be installed.
And, described airscoop shroud is provided with explosion-proof relief mouth.
And, described adsorbent bed is provided with adsorbent bed temperature sensor, adsorbent bed concentration sensor and differential manometer.
And, described pipeline is provided with Tube Temperature Sensor and pipeline concentration sensor.
And described heat exchanger is plate type heat exchanger.
Advantage of the present invention and beneficial effect are:
1, this is provided with industrial volatile organic pollutants exhaust gas inlet for the treatment of on adsorbent bed in the desorption system of industrial volatile organic pollutants, purified gas outlet, desorption waste gas delivery outlet, desorption gas input port, desorption gas loop exit and desorption gas loop head, heat exchanger is provided with catalytic exhaust entrance, catalytic exhaust exports, the import of catalysis gas, catalysis gas exports, supply gas entrance and desorption of desorption is supplied gas outlet, desorption gas loop exit connects desorption gas recirculation heater air inlet by pipeline, this desorption gas recirculation heater air outlet connects desorption gas circulating fan air inlet by pipeline, this desorption gas circulating fan air outlet connects the desorption gas loop head on adsorbent bed by pipeline, the desorption gas loop exit of heat exchanger and desorption gas loop head are connected on the pipeline between desorption gas recirculation heater and desorption gas circulating fan respectively by pipeline, the catalysis gas outlet of heat exchanger connects the catalytic exhaust entrance of heat exchanger by catalysis air intake heater and catalytic bed, catalytic exhaust outlet connects the desorption gas entrance of adsorbent bed by adsorbent bed desorption heater, the catalysis gas import of heat exchanger connects the desorption waste gas delivery outlet of adsorbent bed by catalysis blower fan, this structure achieves the process imagine introducing catalytic bed when gas industry volatile organic pollutants concentration reaches self-sustaining burning concentration in desorption heating circulation system again, make the catalytic bed after preheating can enter self-sustaining burning state fast, the Thermal feedback that catalytic combustion is produced is enough to maintain catalytic bed temperature, and make plate type heat exchanger obtain enough thermals source, heat energy is provided for adsorbent bed continues desorption, and carry out desorption preheating for next adsorbent bed simultaneously, reach design conditions requirement, effectively play a role.For reducing auxiliary heating, saving energy consumption creates conditions.
2, this is provided with catalytic exhaust entrance for the treatment of heat exchanger in the desorption system of industrial volatile organic pollutants, catalytic exhaust exports, the import of catalysis gas, catalysis gas exports, supply gas entrance and desorption of desorption is supplied gas outlet, entrance and the desorption outlet of supplying gas of supplying gas of this desorption is connected in parallel on the pipeline between desorption gas recirculation heater and desorption gas circulating fan by pipeline, desorption supply gas entrance connect pipeline be communicated on the pipeline between desorption gas recirculation heater and desorption gas circulating fan by triple valve, the catalytic bed catalytic exhaust of self-sustaining burning can be sent into plate type heat exchanger and reach industrial volatile organic pollutants desorption temperature in adsorbent bed by heat exchange by this structure, even if electric heater can be closed to save electric energy, especially for multiple adsorbent bed be connected in cleaning system circulate desorption time, adsorbent bed exports concentration can meet catalytic bed self-sustaining burning concentration, during self desorption, recyclegas temperature can be met by plate type heat exchanger, achieve and only use electric heater in initial heating, all the other times can close the self-holding heat supply that electric heater realizes whole cleaning system, greatly save electric energy.
3, originally again the industrial volatile organic pollutants after desorption being incorporated into catalytic bed for the treatment of adsorbent beds in the desorption system of industrial volatile organic pollutants to catalytic bed self-sustaining burning concentration carries out catalytic combustion, ensure that catalytic bed temperature, prevent and into a gas, " blast-cold " of catalytic bed is acted on, effectively prevent catalyst poisoning.
4, this comprises airscoop shroud for the treatment of catalytic bed in the desorption system of industrial volatile organic pollutants, body of heater, air leaving cover, body of heater upper end is fixedly mounted with airscoop shroud, body of heater lower end is fixedly mounted with air leaving cover, body of heater comprises upper head plate that body of heater peripheral board and its upper end be fixedly mounted with and the bottom plate that its lower end is fixedly mounted with, evenly heat-insulation layer is fixed with at body of heater peripheral board outer wall, coaming plate in one body of heater is set in body of heater peripheral board, air intake duct and gas off-take is arranged alternately between coaming plate and body of heater peripheral board in body of heater, the import of air intake duct is arranged on upper head plate, the outlet of air intake duct to be arranged in bottom plate and body of heater between coaming plate, the import of gas off-take to be arranged in upper head plate and body of heater between coaming plate, the outlet of gas off-take is arranged on bottom plate, air inlet kuppe is provided with above in the middle part of the upper head plate of corresponding airscoop shroud import, combustion gas kuppe is provided with on below in the middle part of upper head plate, catalytic bed heater is provided with in the body of heater that air intake port is corresponding, kuppe of giving vent to anger is provided with below in the middle part of the bottom plate that corresponding air leaving cover exports, airscoop shroud connects catalysis air intake heater, air leaving cover connects catalytic exhaust entrance, this kind of over-over mode arranges air intake duct and gas off-take can realize the even air inlet of catalytic bed bottom of furnace body surrounding, thus make the industrial volatile organic pollutants entering body of heater be attracted to the surface of cat ceramic carrier more uniformly, make body of heater combustion even, high-temperature gas after burning refluxes evenly downwards by gas off-take, make bottom of furnace body temperature-compensating even, overcome catalytic bed body of heater centre temperature in prior art high, the shortcoming that temperature low heating in edge is uneven, improve efficiency of combustion and purifying rate, catalytic bed catalytic combustion heat can be utilized further through heat exchanger, realize energy-saving and emission-reduction.
5, this is provided with air inlet kuppe above desorption system of industrial volatile organic pollutants is in the middle part of the upper head plate of corresponding airscoop shroud import, combustion gas kuppe is provided with on below in the middle part of upper head plate, heater is provided with in the body of heater that air intake port is corresponding, this heater is packed on body of heater peripheral board, kuppe of giving vent to anger is provided with below in the middle part of the bottom plate that corresponding air leaving cover exports, air inlet kuppe is positive rectangular pyramid structure, combustion gas kuppe and kuppe of giving vent to anger are inverted positive rectangular pyramid structure, this kind of structural design can effectively realize even air inlet, homogenous combustion, burned VOCs gas uniform enters gas off-take, effective raising catalytic combustion bedside edge spot temperature, evenly discharge after entering into air leaving cover, high burning efficiency is realized and purifying rate lays the first stone for furnace binding.
6, this is provided with catalysis air intake heater for the treatment of front end in the desorption system of industrial volatile organic pollutants in catalytic bed, is provided with catalytic bed heater, it is fast that this kind arranges firing rate, efficiency is high, be arranged on air intake port position, be conducive to Thorough combustion, improve purifying rate, thermocouple is installed in addition on sidewall of the furnace body and facilitates temperature monitoring in body of heater, improve security.
7, this desorption system for the treatment of industrial volatile organic pollutants adopts over-over mode to arrange air intake duct and gas off-take, effectively performs to ultimate attainment by the recycling of catalytic combustion heat.Catalyst combustion reaction heat is utilized to carry out preheating to the gas entering catalytic combustion bed.This warm belongs to countercurrent flow, for the high-temperature catalytic tail gas flow through in the air flue formed by coaming plate in body of heater and body of heater peripheral board, belongs to following current heat exchange for the air-flow in catalytic combustion bed, gas in air intake duct is heated in three directions, and make heat exchange unit to greatest extent near thermal source, reduce heat loss, improve heat exchange efficiency, to ensure that catalytic combustion bed reaches catalysis initiation temperature at the stylish VOCs gas entered of normal combustion, contribute to maintaining that catalyticing combustion process is stable to carry out, reduce the dependence even broken away from auxiliary electrical heater.
8, this for the treatment of in the desorption system of industrial volatile organic pollutants catalytic combustion produce high-temperature tail gas along gas off-take, namely body of heater wall is back to the process of catalytic combustion bed lower part outlet, back feeding heating is carried out to catalytic combustion bed fringe region, contribute to the maintenance of catalytic combustion bed ensemble temperature with even, catalytic combustion is impelled to be evenly distributed in whole catalytic combustion bed cross section, improve catalytic combustion purifying rate, and form benign cycle thus, be beneficial to catalytic combustion and carry out continually and steadily.
9, this is design for disassembly for the treatment of the air inlet kuppe that upper head plate in the desorption system of industrial volatile organic pollutants is arranged and combustion gas kuppe, facilitates the replacing of catalytic combustion pool furnace body inner catalyst, improves production efficiency.
10, these can be different from the quantity of gas off-take for the treatment of air intake duct in the desorption system of industrial volatile organic pollutants, also can be identical, the long-pending outlet channel cross-sections that can equal of inlet channel cross-sectional amasss, the long-pending outlet channel cross-sections that also can be greater than of inlet channel cross-sectional amasss, the long-pending outlet channel cross-sections that can also be less than of inlet channel cross-sectional amasss, determine the cross-section relation between different air intake ducts and gas off-take according to climate reasons, VOCs gas treatment amount and catalyst use amount, make it more adapt to the processing requirements of different situations.
11, this adopts rectangular steel pipe for the treatment of air intake duct in the desorption system of industrial volatile organic pollutants and to be arranged in body of heater peripheral board and body of heater between coaming plate, gas off-take is surrounded by coaming plate in the air intake duct rectangle steel tube wall of its both sides, body of heater peripheral board and body of heater, this kind of patten's design can effectively reduce steel use amount, reduce construction costs, for energy-saving and cost-reducing new design, reach processing requirements completely.
12, this for the treatment of body of heater peripheral board cross section in the desorption system of industrial volatile organic pollutants be rectangle or square or circular, in body of heater coaming plate cross section be rectangle or square or circular, inlet channel cross-sectional is rectangle or square or fan-shaped or circular or ring is fan-shaped, and outlet channel cross-sections is rectangle or square or fan-shaped or circular or ring is fan-shaped.This kind of Structural Transformation mainly adapts to difform catalytic combustion bed profile, facilitates the design of various situation.
13, this is provided with explosion-proof relief mouth for the treatment of on the airscoop shroud in the desorption system of industrial volatile organic pollutants, improves the security of catalytic combustion bed, prevents the generation of security incident.
14 heat exchangers of the present invention are plate type heat exchanger, outlet that heat exchanger is provided with catalytic exhaust entrance, catalytic exhaust outlet, the import of catalysis gas, catalysis gas exports, desorption supplies gas entrance and desorption is supplied gas, more high efficiencyly can utilize heat energy, reduce the dependence to electric energy.
15, the present invention effectively improves the thermal efficiency of process, reduce thermal losses, improve recuperation of heat utilization rate, in catalytic combustion bed during burning in desorption system, temperature is more even, improve efficiency of combustion and purifying rate, add heat exchange Appropriate application heat energy more, meet energy-saving and emission-reduction requirement, the gas temperature of input catalytic bed can effectively control.
Accompanying drawing explanation
Fig. 1 is system connection diagram of the present invention;
Fig. 2 is catalytic bed structural representation of the present invention;
Fig. 3 is the right view of Fig. 2;
Fig. 4 is that the A-A of Fig. 3 is to sectional view;
Fig. 5 is the structural representation (omitting heater, heat-insulation layer, thermocouple and kuppe of giving vent to anger) of the body of heater of catalytic bed of the present invention;
Fig. 6 is that the B-B of Fig. 5 is to sectional view (omitting catalyst bracket and catalyst layer);
Fig. 7 is the top view of Fig. 5;
Fig. 8 is the upward view of Fig. 5;
Fig. 9 is the stereogram (omitting heater, heat-insulation layer, thermocouple, kuppe, catalyst bracket and catalyst layer) of the body of heater of catalytic bed of the present invention;
Figure 10 is heat exchanger structure schematic diagram of the present invention.
Detailed description of the invention
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of desorption system for the treatment of industrial volatile organic pollutants, it comprises catalysis air intake heater 2, catalytic bed 1, catalysis blower fan 20, heat exchanger 3, adsorbent bed 6, desorption gas circulating fan 12, desorption gas recirculation heater 14 and adsorbent bed desorption heater 4, adsorbent bed is provided with industrial volatile organic pollutants exhaust gas inlet 7, purified gas outlet 17, desorption waste gas delivery outlet 16, desorption gas input port 5, desorption gas loop exit 18 and desorption gas loop head 8, heat exchanger is provided with catalytic exhaust entrance 46, catalytic exhaust outlet 51, catalysis gas import 48, catalysis gas outlet 47, supply gas entrance 50 and desorption of desorption is supplied gas outlet 49, desorption gas loop exit connects desorption gas recirculation heater air inlet by pipeline, this desorption gas recirculation heater air outlet connects desorption gas circulating fan air inlet by pipeline, this desorption gas circulating fan air outlet connects the desorption gas loop head on adsorbent bed by pipeline, the desorption gas loop exit of heat exchanger and desorption gas loop head to be connected on the pipeline between desorption gas recirculation heater and desorption gas circulating fan respectively by pipeline and to be controlled by triple valve 13, the catalysis gas outlet of heat exchanger connects the catalytic exhaust entrance of heat exchanger by catalysis air intake heater and catalytic bed, catalytic exhaust outlet connects the desorption gas entrance of adsorbent bed by adsorbent bed desorption heater, the catalysis gas import of heat exchanger connects the desorption waste gas delivery outlet of adsorbent bed by catalysis blower fan.Catalytic bed in the present invention comprises airscoop shroud 23, body of heater 25, air leaving cover 29, body of heater is arranged on support 31, body of heater upper end is fixedly mounted with airscoop shroud, airscoop shroud is arranged airscoop shroud import 21, body of heater lower end is fixedly mounted with air leaving cover, air leaving cover sets out gas hood outlet 30, body of heater comprises upper head plate 24 that body of heater peripheral board 42 and its upper end be fixedly mounted with and the bottom plate 28 that its lower end is fixedly mounted with, heat-insulation layer 36 is evenly fixed with at body of heater peripheral board outer wall, coaming plate 43 in one body of heater is set in body of heater peripheral board, air intake duct 32 and gas off-take 41 is arranged alternately between coaming plate and body of heater peripheral board in body of heater, the import 44 of air intake duct is arranged on upper head plate, the outlet 40 of air intake duct to be arranged in bottom plate and body of heater between coaming plate, the import 33 of gas off-take to be arranged in upper head plate and body of heater between coaming plate, the outlet 45 of gas off-take is arranged on bottom plate, air inlet kuppe 34 is provided with above in the middle part of the upper head plate of corresponding airscoop shroud import, combustion gas kuppe 35 is provided with on below in the middle part of upper head plate, catalytic bed heater 27 is provided with in the body of heater that air intake port is corresponding, kuppe 39 of giving vent to anger is provided with below in the middle part of the bottom plate that corresponding air leaving cover exports, airscoop shroud connects catalysis air intake heater, air leaving cover connects catalytic exhaust entrance, air intake duct is identical with the quantity of gas off-take and to be evenly alternately arranged in body of heater between coaming plate and body of heater peripheral board.Air intake duct also can not be identical with the quantity of gas off-take, described be arranged on the air intake duct being in opposite in body of heater between coaming plate with body of heater peripheral board and air intake duct can one by one corresponding or air intake duct and gas off-take corresponding one by one, air intake duct shown in the present embodiment accompanying drawing 8 and gas off-take quantity are 20 and are evenly alternately arranged in body of heater between coaming plate and body of heater peripheral board, adopt the mode that air intake duct is corresponding one by one with gas off-take, the long-pending outlet channel cross-sections that can equal of inlet channel cross-sectional amasss, the long-pending outlet channel cross-sections that also can be greater than of inlet channel cross-sectional amasss, the long-pending outlet channel cross-sections that can also be less than of inlet channel cross-sectional amasss.Adopt rectangular steel pipe in order to the air intake duct in energy-saving and cost-reducing this catalytic combustion pool furnace body structure and to be arranged in body of heater peripheral board and body of heater between coaming plate, gas off-take is surrounded by coaming plate in the air intake duct rectangle steel tube wall of its both sides, body of heater peripheral board and body of heater, body of heater peripheral board cross section be rectangle or square or circular, in body of heater coaming plate cross section be rectangle or square or circular, inlet channel cross-sectional is rectangle or square or fan-shaped or circular or ring is fan-shaped, and outlet channel cross-sections is rectangle or square or fan-shaped or circular or ring is fan-shaped.Air inlet kuppe is positive rectangular pyramid structure, combustion gas kuppe and kuppe of giving vent to anger are inverted positive rectangular pyramid structure, catalyst bracket 38 is provided with in body of heater above catalytic bed heater, catalyst layer 37 is installed on catalyst bracket, this catalytic bed heater is electric heating tube group, electric heating tube quantity can be determined according to actual conditions, airscoop shroud is provided with explosion-proof relief mouth 22, adsorbent bed is provided with adsorbent bed temperature sensor 9, adsorbent bed concentration sensor 15 and differential manometer 10, pipeline is provided with Tube Temperature Sensor 19 and pipeline concentration sensor 11, heat exchanger is plate type heat exchanger.Sidewall of the furnace body is provided with thermocouple 26.In the present embodiment, the quantity of thermocouple is three, is packed in the position, three, upper, middle and lower of sidewall of the furnace body respectively.
The present invention in use VOCs gas passes into air inlet kuppe gas uniform from the import of airscoop shroud and flows to Fighter Inlet upper head plate, below inlet duct flow to catalytic combustion pool furnace body, the stop of chance bottom plate is turned back and is entered in catalytic combustion pool furnace body, aperture through heater and cat ceramic honeycomb substrate burns, the combustion gas kuppe of the inversion rectangular pyramid structure that the gas after burning meets below end plate evenly enters by the air intake duct rectangle steel tube wall of gas off-take both sides, the gas off-take that in body of heater peripheral board and body of heater, coaming plate surrounds, air leaving cover outlet is evenly flowed out through kuppe of giving vent to anger from gas off-take outlet.
Actual motion compliance test result of the present invention: this new catalytic burning bed furnace binding in actual use, after conventional preheating, passes into VOCs gas, after catalytic combustion occurs, cuts off electrical heating.Within the period that VOCs gas concentration meets minimum ignition concentration, realize self-sustaining burning completely, without any additional auxiliary thermal source, the catalyticing combustion process catalytic combustion bed tempertaure short time reaches 650 DEG C, most time maintains between 400 DEG C-500 DEG C, flameholding, fluctuates less.Three, catalytic combustion bed upper, middle and lower region temperature instrumentation reading is close, and uniformity of temperature profile is described, exit gas detects, and VOCs purifying rate is not less than 98%, meets relevant national standard requirement completely.
During this work of desorption system for the treatment of industrial volatile organic pollutants, after adsorbent bed absorption is saturated, start to carry out de-adsorption cycle and improve adsorbent bed desorption output concentration, after reaching catalytic bed burning concentration, the material got off to catalytic bed output desorption is controlled by Self controlling valve, directly discharge through catalytic bed burning rear portion clean gas, another part clean gas is used by circulating line supply adsorbent bed desorption, heat energy in system is recycled by heat exchanger, at utmost reduce energy consumption, can various heater opening times in effectively minimizing system especially by heat exchanger energy transferring, reach the object of whole system self-sustaining burning.
Claims (10)
1. the desorption system for the treatment of industrial volatile organic pollutants, it is characterized in that: comprise catalysis air intake heater, catalytic bed, catalysis blower fan, heat exchanger, adsorbent bed, desorption gas circulating fan, desorption gas recirculation heater and adsorbent bed desorption heater, adsorbent bed is provided with industrial volatile organic pollutants exhaust gas inlet, purified gas outlet, desorption waste gas delivery outlet, desorption gas input port, desorption gas loop exit and desorption gas loop head, heat exchanger is provided with catalytic exhaust entrance, catalytic exhaust exports, the import of catalysis gas, catalysis gas exports, supply gas entrance and desorption of desorption is supplied gas outlet, desorption gas loop exit connects desorption gas recirculation heater air inlet by pipeline, this desorption gas recirculation heater air outlet connects desorption gas circulating fan air inlet by pipeline, this desorption gas circulating fan air outlet connects the desorption gas loop head on adsorbent bed by pipeline, the desorption gas loop exit of heat exchanger and desorption gas loop head are connected on the pipeline between desorption gas recirculation heater and desorption gas circulating fan respectively by pipeline, the catalysis gas outlet of heat exchanger connects the catalytic exhaust entrance of heat exchanger by catalysis air intake heater and catalytic bed, catalytic exhaust outlet connects the desorption gas entrance of adsorbent bed by adsorbent bed desorption heater, the catalysis gas import of heat exchanger connects the desorption waste gas delivery outlet of adsorbent bed by catalysis blower fan.
2. the desorption system for the treatment of industrial volatile organic pollutants according to claim 1, it is characterized in that: described catalytic bed comprises airscoop shroud, body of heater, air leaving cover, body of heater upper end is fixedly mounted with airscoop shroud, body of heater lower end is fixedly mounted with air leaving cover, body of heater comprises upper head plate that body of heater peripheral board and its upper end be fixedly mounted with and the bottom plate that its lower end is fixedly mounted with, evenly heat-insulation layer is fixed with at body of heater peripheral board outer wall, coaming plate in one body of heater is set in body of heater peripheral board, air intake duct and gas off-take is arranged alternately between coaming plate and body of heater peripheral board in body of heater, the import of air intake duct is arranged on upper head plate, the outlet of air intake duct to be arranged in bottom plate and body of heater between coaming plate, the import of gas off-take to be arranged in upper head plate and body of heater between coaming plate, the outlet of gas off-take is arranged on bottom plate, air inlet kuppe is provided with above in the middle part of the upper head plate of corresponding airscoop shroud import, combustion gas kuppe is provided with on below in the middle part of upper head plate, catalytic bed heater is provided with in the body of heater that air intake port is corresponding, kuppe of giving vent to anger is provided with below in the middle part of the bottom plate that corresponding air leaving cover exports, airscoop shroud connects catalysis air intake heater, air leaving cover connects catalytic exhaust entrance.
3. the desorption system for the treatment of industrial volatile organic pollutants according to claim 2, is characterized in that: described air intake duct is identical with the quantity of gas off-take and to be evenly alternately arranged in body of heater between coaming plate and body of heater peripheral board.
4. the desorption system for the treatment of industrial volatile organic pollutants according to claim 2, is characterized in that: described air inlet kuppe is positive rectangular pyramid structure, and combustion gas kuppe and kuppe of giving vent to anger are inverted positive rectangular pyramid structure.
5. the desorption system for the treatment of industrial volatile organic pollutants according to claim 2, it is characterized in that: described air intake duct adopts rectangular steel pipe and is arranged in body of heater peripheral board and body of heater between coaming plate, gas off-take is surrounded by coaming plate in the air intake duct rectangle steel tube wall of its both sides, body of heater peripheral board and body of heater.
6. the desorption system for the treatment of industrial volatile organic pollutants according to claim 2, is characterized in that: be provided with catalyst bracket in the body of heater above described catalytic bed heater, on catalyst bracket, install catalyst layer.
7. the desorption system for the treatment of industrial volatile organic pollutants according to claim 2, is characterized in that: described airscoop shroud is provided with explosion-proof relief mouth.
8. the desorption system for the treatment of industrial volatile organic pollutants according to claim 1, is characterized in that: described adsorbent bed is provided with adsorbent bed temperature sensor, adsorbent bed concentration sensor and differential manometer.
9. the desorption system for the treatment of industrial volatile organic pollutants according to claim 1, is characterized in that: described pipeline is provided with Tube Temperature Sensor and pipeline concentration sensor.
10. the desorption system for the treatment of industrial volatile organic pollutants according to claim 1, is characterized in that: described heat exchanger is plate type heat exchanger.
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| CN101549249A (en) * | 2009-05-12 | 2009-10-07 | 北京云辰天环保科技有限公司 | Organic exhaust gas processing method and system thereof |
| CN202087196U (en) * | 2011-03-25 | 2011-12-28 | 天津理工大学 | High-efficiency energy-saving purification system for industrial volatile organic pollutants |
| JP2012207630A (en) * | 2011-03-30 | 2012-10-25 | Toyota Motor Corp | Exhaust emission control apparatus of internal combustion engine |
| CN203507769U (en) * | 2013-09-27 | 2014-04-02 | 天津赛智科技发展有限公司 | Desorption system for processing industrial volatilizable organic pollutant |
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