Comparison of operating costs of zeolite wheels and activated carbon.

 First, the "unortic exhaust gas zeolite wheel enrichment" scheme and operating costs,
zeolite adsorption concentrated wheel combination (Cassette) as a central bearing and body, the body is made of zeolite adsorption medium and ceramic fibers. The wheel contains gas gas for separate treatment and for the release of clean gas after treatment. The gasket isolates the beehive zeolite adsorption wheel combination into an adsorption treatment area, a regenerative desorption zone,

.
Filtered exhaust gas into the zeolite wheel, the wheel at a lower speed continuous rotation, exhaust gas blown by the adsorption fan into the wheel adsorption area, after treatment of clean gas into the atmosphere, when the wheel adsorption to the desorption zone, a small amount of clean After heat exchange between the gas and the high temperature gas in the RTO combustion chamber, the heat is heated to the hot gas (180-200 degrees C) to de-attach the adsorption of the adsorbed VOCs and regenerate the absorbed high-concentration exhaust gas into the rotating RTO.Zeolite wheel mainly consists of zeolite module, wheel box body, adsorption fan, de-attached fan, wheel drive, hot air heat exchanger, wheel exit control valve, dissoated inlet control valve, un attached exit control valve, thermocouple, pressure differential meter and so on.
15000m3/h air volume without tissue exhaust gas, using zeolite concentrated wheel treatment of operating cost measurement:
operating maintenance cost analysis (annual production of 6912 hours calculation, start-up rate of 60%, full load rate of 60%, stability factor 80 , electricity is calculated at 0.7 yuan/degree, natural gas is calculated at 3.5 yuan/m3:
1), electricity: electricity in
(yuan): 23 X0.6X6912 X0.6 X0 .8 X0.7 s 32049 yuan/year;
2), Zeolite module replacement cost:
Zeolite wheel replacement frequency (life approximately 8 years)
Zeolite wheel replacement cost: Zeolite module for barrel wheel For the split type, the design book module number of a total of 12 blocks, can timely check the operating status, convenient for individual module replacement, 12 pieces of all replacement of about 150,000, the average annual replacement cost of 18750
yuan / year
; Zeolite wheel disembering temperature (C): with calculation instructions and relevant data;
cylinder wheel disembering temperature 180 degrees C, concentrated 10 times;
concentration multiply rate: with the relevant information or discussion;
according to the above calculation book: barrel wheel concentrate 10 times;
de-attached air volume (m3/h): barrel wheel 1500Nm3/h;
zeolite wheel de-attached heat (kcal/h): barrel wheel de-attached heat 64,000 kcal/h;
gas (m3/h): barrel wheel 64000/8500 s 7.53m3/h, total gas consumption in
(m3): barrel wheel 7.53 X12 X300 s27108m3/year,
Heat-free natural gas costs in
(yuan): barrel wheel 3.5 X27108 x 94878 yuan / year, total operating and maintenance costs in
(yuan): 32049 plus 18750 plus 94878 x 145,000 yuan;
, "no tissue exhaust gas activated carbon adsorption desorption" program and operating costs;
15000m3/h air volume without tissue exhaust gas, the operating cost of activated carbon adsorption desorption treatment is calculated:
activated carbon selection parameters and calculations:
unorted operating conditions air volume Q:15000m3/h;
exhaust gas concentration n: about 150mg/m3;
types of activated carbon used: cellular carbon (following cellular carbon as an example
);
activated carbon use W:3 adsorption and 1 de-attachment of 4 carbon cans (cases) 325✕4 x 1300 kg, of which 3 adsorption carbon boxes activated carbon quality is: WY: 2600✕3/4; Dynamic adsorption efficiency of activated carbon mx:90 to 94%;
activated carbon saturation adsorption time (h): dynamic saturation adsorption time calculation: Wy✕mx✕106/Q✕n✕975✕1000000/15000✕150-26h.
activated carbon de-attachment efficiency mt: 20-30% ;( de-attached temperature 80 degrees C)
operating maintenance cost analysis (annual production 6912 hours calculation, start-up rate of 60%, full load rate of 60%, 80% stability factor, electricity charges according to 0.7 yuan / degree calculation, natural gas according to 3.5 yuan / m3 calculation):
1), electrical energy;
activated carbon adsorption fan power (kw): 18.5kw
activated carbon de-adhesive fan power (kw): 4kw
electricity bill (yuan): 22.5 X0.6X6912 X0.6 X0.8 X0.7 x 31352 yuan/ year;
4 carbon cans two days to complete a adsorption-desorption cycle, adsorption system works 12 hours a day, desorption system 24 hours continuous work, unsending VOC concentration of about 3000mg/m3.
2), activated carbon replacement costs;
activated carbon replacement frequency: de-attached temperature of 80 degrees C activated carbon replacement time is 15 to 20 days, that is, the number of annual replacements: 20 times;
activated carbon replacement costs (yuan/times): 20480 yuan (according to 8000 yuan / m3)
solid waste treatment costs (yuan / times): 8448 yuan (according to 6000 yuan / ton)
activated carbon replacement and treatment costs (yuan): 570,000
de-attached temperature 120 degrees C Then activated carbon replacement time is 7200 hours, that is, the number of annual replacements: 1.5 times, the annual cost of 43,000; (domestic 120 degrees C temperature desorption technology is immature, there is a greater risk of fire
3), de-attached heating costs
active carbon single de-attachment time of 12 hours, de-attached wind volume 1500m3/h;
activated carbon desorption temperature : 80
activated carbon desorption frequency: de-attachment time 12 hours, 4 adsorption tanks need 48 hours de-attachment completion, i.e. two days to complete an adsorption-desorption cycle;
activated carbon de-attachment heat (kcal): 1500m3/h✕ (80) -25 degrees C) ✕1.3 x 286,000 k/h
equivalent natural gas (m3): 3.6 m3/h total gas consumption in
(m3): 12960 m3
de-heating gas cost (yuan): 45,000;
operating and maintenance expenses (yuan): 3.13 plus 57 plus 4.5 plus 676.3 million;third, cost comparison table,
fourth,the selection of zeolite concentrated wheel;
the form of zeolite wheel: disc wheel, barrel wheel, 5, zeolite concentrated wheel front treatment equipment,
. Filtration device: In order to protect the adsorption performance of zeolite wheel, the exhaust gas needs to be pre-processed before entering the zeolite wheel, so that the dust particles entering the wheel concentration system can be effectively removed.the on-line differential switch before and after the filter to ensure the normal, safe and stable operation of the exhaust gas filtration system. When the pressure of the filtration system reaches the set alarm value, the alarm system sends an alarm signal, which is connected to the PLC, alerting the operator to replace the corresponding filter.
filter parameters:
filtering efficiencyform filtering air volume (m3/h) filtering wind resistance
(Pa)filter materialsize
F5bag 3250 50 (start) - 450 (last)material 5 92 x 592 x 600
F7 bag 3250 75 (start) -450 (last) synthetic material 592 x 592 x 400
F9 bag 3250 105 (start) - 450 (last) synthetic material 592 x 592 x 600
Because when the exhaust gas temperature into the wheel is high, the exhaust gas needs to be indirectly cooled by increasing the circulating cooling water at the rear end of the filtration device, so that the exhaust gas temperature entering the zeolite wheel is within 35 degrees C, the adsorption efficiency of the zeolite wheel is stable.
cooling unit is equipped with cooling tower, table cooler, circulating water pump, valve assembly, valve block filter, pipeline, instrumentation and temperature control system. The system automatically activates the circulating cooling system when the exhaust gas temperature is above 35 degrees C.
.