Power-saving industrial is volatilizable organic pollution efficient purifying system
Technical field
The invention belongs to organic pollution cleaning system field, the volatilizable organic pollution efficient purifying system of especially a kind of power-saving industrial.
Background technology
The volatilizable organic pollution cleaning system of industry mainly comprises at present, comprise the mixed flow heat exchanger, new air flow-mixing blower fan, the catalytic combustion bed, the desorption electric heater, desorption circulating fan and adsorbent bed, catalytic combustion bed first air outlet and new air flow-mixing blower fan air outlet connect mixed flow heat exchanger air inlet by pipeline respectively, mixed flow heat exchanger air outlet connects the desorption circulating fan by desorption electric heater and adsorbent bed, though this system has certain clean-up effect, 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 metal structure just consumes 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. 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.Two 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 volatilizable organic pollution efficient purifying system of power-saving industrial of operating cost.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of power-saving industrial is volatilizable organic pollution efficient purifying system, comprise the mixed flow heat exchanger, new air flow-mixing blower fan, the catalytic combustion bed, the desorption electric heater, desorption circulating fan and adsorbent bed, new air flow-mixing blower fan air outlet connects mixed flow heat exchanger air inlet by pipeline, mixed flow heat exchanger air outlet is by the desorption electric heater, adsorbent bed and desorption circulating fan connect catalytic combustion bed air inlet, 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, its catalytic bed body upper end is shaped on air inlet, catalytic bed body lower end is shaped on air outlet, this air outlet comprises first air outlet, 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; Catalytic combustion bed first air outlet connects the air inlet of mixed flow heat exchanger 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 sidewall hot blast import that adsorbent bed has hollow structure by an adsorbent bed heating blower.
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, describedly between desorption circulating fan and catalytic combustion bed, install a spark arrester additional.
Advantage of the present invention and beneficial effect are:
1, the catalytic combustion bed of this cleaning 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, air outlet comprises first air outlet, 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, 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.
2, the adsorbent bed of this cleaning system 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, have on the two side of hollow structure and be respectively arranged with hot blast import and hot-blast outlet, catalytic combustion bed second air outlet connects the hot blast import that adsorbent bed has the hollow structure sidewall by an adsorbent bed heating blower; The hot blast import of this kind structure connects the outlet of catalytic bed tail gas, desorption process utilizes the hardware of catalysis tail gas heating adsorbent bed inside and passes through interior adsorbent and the adsorbate of conduction convection type indirect adsorbent bed, thereby significantly shortened desorption time, reduced power consumption, made full use of the heat energy that catalyticing combustion process produces, environmental protection, and greatly reduce equipment operating cost, improved exhaust-gas treatment efficient, and can effectively solve low at the northern area winter temperature, desorption prolongs heat time heating time, and power consumption increases, even the technical barrier that the desorption flow process can not normally be moved.
3, this cleaning system installs a spark arrester additional between desorption circulating fan and catalytic combustion bed, has increased the security and the reliability of system, prevents the generation of contingency.
4, 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 the volatilizable organic pollution efficient purifying system of a kind of safe and reliable power-saving industrial.
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.
A kind of power-saving industrial is volatilizable organic pollution efficient purifying system, comprise mixed flow heat exchanger, new air flow-mixing blower fan, catalytic combustion bed, desorption electric heater, desorption circulating fan and adsorbent bed, new air flow-mixing blower fan air outlet connects mixed flow heat exchanger air inlet by pipeline, mixed flow heat exchanger air outlet connects catalytic combustion bed air inlet by desorption electric heater, adsorbent bed and desorption circulating fan, and its innovative point is:
(1), the catalytic combustion bed comprises 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, 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, this air outlet comprises first air outlet, second air outlet and the 3rd 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 is by the air inlet of pipeline connection mixed flow heat exchanger, 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 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 sidewall hot blast import that adsorbent bed has hollow structure by an adsorbent bed heating blower, installs a spark arrester additional between desorption circulating fan and catalytic combustion bed.
The present invention in use, after Alveolate activated carbon capable on the adsorbent bed reaches capacity, begin to enter the desorption flow process, new air flow-mixing blower fan enters adsorbent bed with fresh air by mixed flow heat exchanger and desorption electric heater and carries out desorption, gas behind the desorption enters the catalytic combustion bed by desorption circulating fan and spark arrester and carries out purification of combustion, tail gas discharged has reached discharge standard from the catalytic combustion bed, but this tail gas continuation circulation can be entered the mixed flow heat exchanger for energy-saving and cost-reducing, so that thermal source to be provided, the tail gas that has heat enters adsorbent bed by the mixed flow heat exchanger, reached desorption temperature 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.