CN102188877A - High-efficiency energy-saving desorption system of industrial volatilizable organic pollutant - Google Patents
High-efficiency energy-saving desorption system of industrial volatilizable organic pollutant Download PDFInfo
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- CN102188877A CN102188877A CN2011100734482A CN201110073448A CN102188877A CN 102188877 A CN102188877 A CN 102188877A CN 2011100734482 A CN2011100734482 A CN 2011100734482A CN 201110073448 A CN201110073448 A CN 201110073448A CN 102188877 A CN102188877 A CN 102188877A
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Abstract
The invention relates to a high-efficiency energy-saving desorption system of an industrial volatilizable organic pollutant. The system comprises a catalytic combustion bed, an absorption bed, a mixed flow heat exchanger, a desorption electric heater and a desorption circulating fan. The system is characterized in that: (1) the catalytic combustion bed comprises a catalytic bed body, an air inlet, an air outlet, a catalytic electric heater, an air distribution plate and a catalytic bed layer, wherein the catalytic electric heater, the distribution plate and the catalytic bed layer are arranged sequentially from up to down in the catalytic bed body; and (2) the absorption bed comprises active carbon partition plates having a hollow structure and side walls having the hollow structure, wherein the active carbon partition plates are communicated with the side walls, and a hot air inlet and a hot air outlet are respectively formed on the two side walls having the hollow structure. The high-efficiency energy-saving desorption system of the industrial volatilizable organic pollutant is simple and reasonable in structure, safe and reliable, and can effectively reduce energy consumption, improve purification rate, prolong the service life of a catalyst, shorten the time of a desorption flow, improve purification efficiency and reduce operating cost.
Description
Technical field
The invention belongs to organic pollution desorption system field, the energy-efficient desorption of the volatilizable organic pollution of especially a kind of industry system.
Background technology
The desorption system comprises the catalytic combustion bed in the prior art, the mixed flow heat exchanger, the desorption electric heater, desorption circulating fan and the adsorbent bed that is used, mixed flow heat exchanger air outlet connects the desorption circulating fan by desorption electric heater and adsorbent bed, the desorption circulating fan is introduced mixed flow heat exchanger and desorption electric heater with air successively by pipeline, enter adsorbent bed through the air after heating up and realize desorption, waste gas behind the desorption delivers into the catalytic combustion bed and carries out catalytic combustion generation cleaning gas up to standard, a part of cleaning gas up to standard enters atmosphere, and another part cleans gas up to standard and enters the mixed flow heat exchanger heat energy is provided.Though this existing system can be realized the processing of the volatilizable organic pollution of large-wind-volume low-concentration industry, but there are the following problems: 1. because will be to adsorbent in entering adsorbent bed by the air after the intensification of desorption electric heater, adsorbate and adsorbent bed metal structure heat simultaneously, the adsorbent bed hardware must absorb and consume partial heat energy like this, thereby prolonged desorption time, reduced desorption efficient, especially northerly winter, heat-energy losses is bigger, desorption time is longer, and the waste heat that catalytic combustion produces is not fully utilized also can increase the weight of thermal pollution to atmospheric environment; 2. when the heat energy of the cleaning high-temperature gas up to standard that utilizes the catalytic combustion bed to discharge, owing to adopt the mixed flow heat exchange mode, the existence of high-temperature catalytic tail gas has reduced the partial pressure of oxygen of mist, the active oxygen that participates in catalytic reaction is reduced, catalyst activity reduces, thereby have influence on the continuous stability of catalytic oxidation and reacting completely property, purifying rate reduction, electrical heating energy consumption are increased; 3. the purifying rate of catalytic combustion bed is lower, catalyst is short service life, trace it to its cause for: industrial volatilizable organic pollution is to enter catalytic combustion bed of the prior art from the below, discharge from the top, the catalytic combustion that lower floor takes place produces heat effect to the catalytic bed on upper strata, thereby whole catalytic bed upper area surpasses the operating temperature of its permission easily because of the heat energy savings, and catalyst is lost activity, cause purifying rate to reduce, catalyst shortening in service life; Industrial in addition volatilizable organic pollution catalyticing combustion process free convection direction is bottom-up operation, and during through the catalytic combustion bed, waste gas begins to quicken to rise, and causes reduce the time of contact of waste gas and catalytic combustion bed, causes purifying rate to reduce.Three aspect reasons cause that whole cleaning system energy consumption height of the prior art, purifying rate are low in sum, catalyst shortens service life, the desorption flow process time is long, purification efficiency is lower, and operating cost is higher.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and can effectively cut down the consumption of energy, improve purifying rate, prolong catalyst service life, shorten the desorption flow process time, improve purification efficiency, reduce the energy-efficient desorption of the industrial volatilizable organic pollution system of operating cost.
The present invention solves its technical problem and is achieved through the following technical solutions:
The energy-efficient desorption of the volatilizable organic pollution of a kind of industry system, comprise the catalytic combustion bed, adsorbent bed, the mixed flow heat exchanger, desorption electric heater and desorption circulating fan, mixed flow heat exchanger air outlet connects the desorption circulating fan by desorption electric heater and adsorbent bed, its (1), the catalytic combustion bed comprises the catalytic bed body, air inlet, air outlet, the catalysis electric heater, air distribution plate and catalytic bed, air outlet comprises first air outlet, second air outlet and the 3rd air outlet, its catalytic bed body upper end is shaped on air inlet, catalytic bed body lower end is shaped on first air outlet respectively, second air outlet and the 3rd air outlet, be disposed with the catalysis electric heater in the catalytic bed body from top to bottom, air distribution plate and catalytic bed, the external wall of this catalytic bed installs the pyroceram fibre heat-insulation layer, and catalytic combustion bed first air outlet connects mixed flow heat exchanger first air inlet by pipeline;
(2), adsorbent bed comprises the air intake expansion mouth, active-carbon bed body and air-out choke, the two sides that active-carbon bed body is relative connects air intake expansion mouth and air-out choke respectively, on the air intake expansion mouth, be fixed with air distribution plate, multilayer active carbon dividing plate is set in the active-carbon bed body, wherein active-carbon bed body two lateral walls all is set to have the sidewall of hollow structure, the active carbon dividing plate is set to have the active carbon dividing plate of hollow structure, active carbon dividing plate with hollow structure is communicated with the sidewall with hollow structure, has on the two side of hollow structure to be respectively arranged with hot blast import and hot-blast outlet;
(3), catalytic combustion bed second air outlet connects the thermal source wind inlet of a plate type heat exchanger by pipeline, the first thermal source wind outlet of this plate type heat exchanger connects the sidewall hot blast import that adsorbent bed has hollow structure by an adsorbent bed heating blower;
(4), this plate type heat exchanger is provided with first gas feed to be heated, first gas vent to be heated, second gas feed to be heated and second gas vent to be heated, wherein first gas vent to be heated connects mixed flow heat exchanger second air inlet by pipeline, second gas feed to be heated connects the outlet of desorption circulating fan, and second gas vent to be heated connects catalytic combustion bed air inlet.
And described catalytic bed comprises catalyst carrier and catalyst, and catalyst carrier is a honeycomb ceramic body, and catalyst is alundum (Al and Bo, Palladium.
And, described at plate type heat exchanger second gas vent to be heated and catalytic combustion bed air inlet between install a spark arrester additional.
Advantage of the present invention and beneficial effect are:
1, the catalytic combustion bed of this desorption system comprises the catalytic bed body, air inlet, air outlet, the catalysis electric heater, air distribution plate and catalytic bed, its catalytic bed body upper end is shaped on air inlet, catalytic bed body lower end is shaped on air outlet, be disposed with the catalysis electric heater in the catalytic bed body from top to bottom, air distribution plate and catalytic bed, the external wall of this catalytic bed installs the pyroceram fibre heat-insulation layer, this structure has effectively improved the time of contact of waste gas and catalytic bed, avoided the overheated of catalytic bed top, make temperature equalization between each catalytic bed, improved the catalytic purification rate, and the pyroceram fibre of the external wall of catalytic bed can effectively reduce heat energy loss, raising catalytic combustion efficient and self-sustaining burning stability.
3, this desorption system adopts plate type heat exchanger, it is provided with first gas feed to be heated, first gas vent to be heated, second gas feed to be heated and second gas vent to be heated, wherein first gas vent to be heated connects mixed flow heat exchanger second air inlet by pipeline, second gas feed to be heated connects the outlet of desorption circulating fan, and second gas vent to be heated connects catalytic combustion bed air inlet; This structure can effectively be carried out heat exchange to Cryogenic air, make Cryogenic air reach desorption temperature, and improved oxygen content in the VOCs mist that enters catalytic bed, improved catalytic combustion purifying rate and desorption efficient, reduced thermal pollution when having made full use of catalytic combustion thermal energy environment.
4, this desorption system installs a spark arrester additional between second gas vent to be heated of plate type heat exchanger and catalytic combustion bed air inlet, has increased the security and the reliability of system, prevents the generation of contingency.
5, system architecture advantages of simple of the present invention, can effectively cut down the consumption of energy, improve purifying rate, prolong catalyst service life, shorten the desorption flow process time, improve purification efficiency, reducing operating cost, is a kind of safe and reliable energy-efficient desorption of industrial volatilizable organic pollution system.
Description of drawings
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is the structural representation of adsorbent bed of the present invention;
Fig. 3 is the right view (omitting air-out choke and Alveolate activated carbon capable) of Fig. 2;
Fig. 4 is the vertical view of Fig. 2;
Fig. 5 is the structural representation of catalytic combustion bed of the present invention;
Fig. 6 is the vertical view of Fig. 5.
The specific embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
The energy-efficient desorption of the volatilizable organic pollution of a kind of industry system, comprise catalytic combustion bed, adsorbent bed, mixed flow heat exchanger, desorption electric heater and desorption circulating fan, mixed flow heat exchanger air outlet connects the desorption circulating fan by desorption electric heater and adsorbent bed, and its innovative point is:
(1), catalytic bed body 21, air inlet 15, air outlet 20, electric heater 16, air distribution plate 17 and catalytic bed 18, the external wall of catalytic bed is fixed with heat-insulation layer 19, this heat-insulation layer is a pyroceram fibre, air outlet comprises first air outlet, second air outlet and the 3rd air outlet, catalytic bed comprises catalyst carrier and catalyst, catalyst carrier is a honeycomb ceramic carrier, catalyst is alundum (Al and platinum Palladium, alundum (Al is one year, platinum Palladium is two years, its catalytic bed body upper end is shaped on air inlet, catalytic bed body lower end is shaped on air outlet, be disposed with electric heater in the catalytic bed body from top to bottom, air distribution plate and catalytic bed, catalytic combustion bed first air outlet connects mixed flow heat exchanger first air inlet by pipeline, and the catalytic combustion bed is provided with the 3rd air outlet and is used for directly discharging gas up to standard;
(2), adsorbent bed comprises air intake expansion mouth 12, active-carbon bed body 5 and air-out choke 6, the small-caliber end of air intake expansion mouth connects blast pipe 1, this blast pipe can connect first spark arrester and desorption electric heater respectively by threeway and valve, the small-caliber end of air-out choke connects discharge pipe 7, this discharge pipe can connect absorption main air blower and desorption circulating fan, air-out choke bottom offers manhole 8, this manhole is equipped with the door that reloads, active-carbon bed body top offers explosion-proof relief mouth 3, the two sides that active-carbon bed body is relative connects air intake expansion mouth and air-out choke respectively, on the air intake expansion mouth, be fixed with air distribution plate 11, this air distribution plate can be arranged according to the actual condition at scene, it mainly is evenly to guide the waste gas that contains industrial volatilizable organic pollution on the active carbon dividing plate active carbon, multilayer active carbon dividing plate is set in the active-carbon bed body, place Alveolate activated carbon capable 10 on this active carbon dividing plate, the uniform thermal resistance connector 14 that is provided with on the active-carbon bed body sidewall, be used to connect thermal resistance, thereby each temperature data of very first time monitoring adsorbent bed, it is that the steel pipe of rectangle is as support that four jiaos of active-carbon bed bodies adopt the cross section, the moulding of convenient active-carbon bed body, for the connection of follow-up structure is laid a solid foundation, active-carbon bed body two lateral walls all is set to have the sidewall 13 of hollow structure, the active carbon dividing plate is set to have the active carbon dividing plate 9 of hollow structure, active carbon dividing plate with hollow structure is communicated with the sidewall with hollow structure, have on the two side of hollow structure and be respectively arranged with hot blast import 2 and hot-blast outlet 4, the active carbon dividing plate with hollow structure after the connection and the sidewall with hollow structure can reach hot blast and enter in the active carbon dividing plate with hollow structure and sidewall with hollow structure back of flowing from the hot blast import and discharge this hot blast import from hot-blast outlet, hot-blast outlet, the sidewall structures that has the active carbon dividing plate of hollow structure and have a hollow structure is mainly used in altogether introduces catalytic combustion tail gas heating adsorbent bed metal structure.Give this adsorbent equipment fast cooling in use if desired,, can also directly introduce air from the hot blast import and cool off, thereby enter adsorption process again from desorption process more quickly by threeway and blower fan to improve service efficiency;
(3), catalytic combustion bed second air outlet connects the thermal source wind inlet of a plate type heat exchanger by pipeline, the first thermal source wind outlet of this plate type heat exchanger connects the sidewall hot blast import that adsorbent bed has hollow structure by an adsorbent bed heating blower, plate type heat exchanger is provided with second hot-blast outlet, is used for directly discharging through the gas up to standard of heat exchange;
(4), this plate type heat exchanger is provided with first gas feed to be heated, first gas vent to be heated, second gas feed to be heated and second gas vent to be heated, wherein first gas vent to be heated connects mixed flow heat exchanger second air inlet by pipeline, second gas feed to be heated connects the outlet of desorption circulating fan, second gas vent to be heated connects catalytic combustion bed air inlet, installs a spark arrester additional between second gas vent to be heated of plate type heat exchanger and catalytic combustion bed air inlet.
The present invention in use, the exhaust gas source of the volatilizable organic pollution of industry is passed through filter successively by pipeline, first spark arrester arrives adsorbent bed, gas after the waste gas of the volatilizable organic pollution of industry is handled through adsorbent bed can reach discharge standard and directly discharge, after the Alveolate activated carbon capable on the adsorbent bed reaches capacity, electric cabinet is controlled corresponding adsorption plant switching by pre-set programs and circuit and is entered the desorption flow process, start the desorption catalyzing combustion system, opening desorption circulating fan fresh air enters from the pipeline fresh inlet and enters adsorbent bed by mixed flow heat exchanger and desorption electric heater and carry out desorption, gas behind the desorption enters the catalytic combustion bed by the plate type heat exchanger and second spark arrester and carries out the catalytic combustion purification, tail gas discharged has reached discharge standard from the catalytic combustion bed, for realizing UTILIZATION OF VESIDUAL HEAT IN, energy-saving and cost-reducing, provide thermal source with this high-temperature tail gas continuation introducing plate type heat exchanger and mixed flow heat exchanger, at this moment the fresh air that enters from fresh inlet at first can carry out heat exchange by plate type heat exchanger, enter adsorbent bed by the auxiliary heating of mixed flow heat exchanger again, reached the temperature that desorption requires owing to flow through the air of mixed flow heat exchanger, so can close the desorption electric heater, that is to say when just beginning to start the desorption catalyzing combustion system, need to open the desorption electric heater, after catalyticing combustion process starts successfully and stablizes, promptly can close the desorption electric heater, save electric energy, temperature was still about 100 ℃ after the tail gas of catalytic combustion bed discharge passed through plate type heat exchanger in addition, directly it is sent into the import of adsorbent bed hot blast by the adsorbent bed heating blower, this hot blast flows in active carbon dividing plate with hollow structure and sidewall with hollow structure, discharge from hot-blast outlet, by the metal structure in the direct heating adsorbent bed, adsorbent bed desorption programming rate is accelerated, realize saving energy and reduce the cost by making full use of the catalytic combustion waste heat, effect is particularly remarkable when the northern area winter operation.
Claims (3)
1. the energy-efficient desorption of the volatilizable organic pollution of industry system, comprise catalytic combustion bed, adsorbent bed, mixed flow heat exchanger, desorption electric heater and desorption circulating fan, mixed flow heat exchanger air outlet connects the desorption circulating fan by desorption electric heater and adsorbent bed, it is characterized in that:
(1), the catalytic combustion bed comprises the catalytic bed body, air inlet, air outlet, the catalysis electric heater, air distribution plate and catalytic bed, air outlet comprises first air outlet, second air outlet and the 3rd air outlet, its catalytic bed body upper end is shaped on air inlet, catalytic bed body lower end is shaped on first air outlet respectively, second air outlet and the 3rd air outlet, be disposed with the catalysis electric heater in the catalytic bed body from top to bottom, air distribution plate and catalytic bed, the external wall of this catalytic bed installs the pyroceram fibre heat-insulation layer, and catalytic combustion bed first air outlet connects mixed flow heat exchanger first air inlet by pipeline;
(2), adsorbent bed comprises the air intake expansion mouth, active-carbon bed body and air-out choke, the two sides that active-carbon bed body is relative connects air intake expansion mouth and air-out choke respectively, on the air intake expansion mouth, be fixed with air distribution plate, multilayer active carbon dividing plate is set in the active-carbon bed body, wherein active-carbon bed body two lateral walls all is set to have the sidewall of hollow structure, the active carbon dividing plate is set to have the active carbon dividing plate of hollow structure, active carbon dividing plate with hollow structure is communicated with the sidewall with hollow structure, has on the two side of hollow structure to be respectively arranged with hot blast import and hot-blast outlet;
(3), catalytic combustion bed second air outlet connects the thermal source wind inlet of a plate type heat exchanger by pipeline, the first thermal source wind outlet of this plate type heat exchanger connects the sidewall hot blast import that adsorbent bed has hollow structure by an adsorbent bed heating blower;
(4), this plate type heat exchanger is provided with first gas feed to be heated, first gas vent to be heated, second gas feed to be heated and second gas vent to be heated, wherein first gas vent to be heated connects mixed flow heat exchanger second air inlet by pipeline, second gas feed to be heated connects the outlet of desorption circulating fan, and second gas vent to be heated connects catalytic combustion bed air inlet.
2. the energy-efficient desorption of the volatilizable organic pollution of industry according to claim 1 system, it is characterized in that: described catalytic bed comprises catalyst carrier and catalyst, catalyst carrier is a honeycomb ceramic body, and catalyst is alundum (Al and Bo, Palladium.
3. the energy-efficient desorption of the volatilizable organic pollution of industry according to claim 1 system is characterized in that: described at plate type heat exchanger second gas vent to be heated and catalytic combustion bed air inlet between install a spark arrester additional.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289197A (en) * | 2015-11-19 | 2016-02-03 | 苏州韵蓝环保科技有限公司 | Exhaust gas purifier by using double methods |
| CN107420162A (en) * | 2017-09-06 | 2017-12-01 | 艾美达（天津）科技有限公司 | A kind of exhaust gas from diesel vehicle discharges clarifier |
| CN107970904A (en) * | 2018-01-26 | 2018-05-01 | 索红卫 | A kind of regenerating active carbon system and application method |
| CN108097035A (en) * | 2017-11-15 | 2018-06-01 | 江苏齐力涂装机械制造有限公司 | A kind of activated carbon is desorbed purifier |
| CN110017492A (en) * | 2018-10-31 | 2019-07-16 | 浙江理工大学 | Exhaust gas volatile organic compounds by catalytic combustion and non-uniformly distributed heat pipe residual-heat recovery |
| CN113477021A (en) * | 2021-07-26 | 2021-10-08 | 山西新华防化装备研究院有限公司 | Adsorption and desorption efficient purification equipment |
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Patent Citations (4)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105289197A (en) * | 2015-11-19 | 2016-02-03 | 苏州韵蓝环保科技有限公司 | Exhaust gas purifier by using double methods |
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| CN110017492B (en) * | 2018-10-31 | 2024-02-20 | 浙江理工大学 | Waste gas volatile organic compound catalytic combustion and non-uniform heat pipe waste heat recovery device |
| CN113477021A (en) * | 2021-07-26 | 2021-10-08 | 山西新华防化装备研究院有限公司 | Adsorption and desorption efficient purification equipment |
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