CN104197692B - A kind of mercury catalyst production circulation of tail gas is using drying system and its drying meanss - Google Patents
A kind of mercury catalyst production circulation of tail gas is using drying system and its drying meanss Download PDFInfo
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- CN104197692B CN104197692B CN201410379808.5A CN201410379808A CN104197692B CN 104197692 B CN104197692 B CN 104197692B CN 201410379808 A CN201410379808 A CN 201410379808A CN 104197692 B CN104197692 B CN 104197692B
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Abstract
The invention discloses a kind of mercury catalyst production circulation of tail gas is using drying system and its drying meanss, the drying system is by air-introduced machine, electric central warm air furnace, drying oven, activated carbon absorption tower and scrubbing tower composition, the outlet of the air-introduced machine is connected with the import of electric central warm air furnace, the outlet of electric central warm air furnace is connected with the import of drying oven, drying oven is connected with the import of scrubbing tower through activated carbon absorption tower, the predrying stove and aerator being sequentially connected is also set up between the drying oven and activated carbon absorption tower, the scrubbing tower forms closed-loop path through moisture trap with the inlet communication of air-introduced machine；The drying meanss mainly include tail gas heating, touch coal drying and the several steps of dust removal process.Tail gas after washing is introduced moisture trap by the present invention, can be obtained dry gas, then be sent into air stove by air-introduced machine, recycled tail gas, not only reduce discharge capacity, reduce environmental pollution, and reduce dry time, effective control heavy metal pollution discharge capacity.
Description
Technical field
The invention belongs to mercury catalyst production technical field, is specifically related to a kind of mercury catalyst production circulation of tail gas and utilizes drying
System and its drying meanss.
Background technology
The production of mercury catalyst mainly include immersion, cool put, dry, packing four processes, wherein drying process is mercury catalyst
The key link of production, the quality of drying process directly influence the drying and dewatering efficiency and product quality of mercury catalyst.At present, hydrargyrum
The drying process of catalyst production is typically with air-introduced machine and heats air suction electric central warm air furnace, makes gas temperature reach 150 DEG C
Left and right, then makes hot blast sequentially enter drying oven and predrying stove, and the catalyst in drying oven and predrying stove passes through the height of 4 hours
In catalyst about 99.7% and 80% moisture content can be removed after temperature evaporation respectively, packaging after the catalyst moisture content in drying oven is qualified, is entered
Operation, catalyst in predrying stove enter drying oven and are dried again, the tail gas of predrying stove after activated carbon absorption tower again
Entering scrubbing tower carries out qualified discharge after dust removal process.
In above-mentioned mercury catalyst production technology, as dried tail gas is directly discharged, the hydrargyrum that carries in tail gas, mercuric chloride
Also entered in air Deng harmful substance simultaneously, qualified discharge is processed despite passing through, but total amount increases, and causes heavy metals emission amount
Increase, certain impact can be caused on environment, there is certain potential safety hazard；Simultaneously as being directly to extract sky by air-introduced machine
Gas, then heated by electric central warm air furnace, because carrying large quantity of moisture secretly in air, the moisture condensed out in last preheating gas is again
Absorbed by catalyst, the overlong time for drying every stove, and moisture can not be completely removed, therefore, catalyst drying and dewatering is less efficient,
Energy consumption is higher.
Content of the invention
For solving the above problems, the invention provides a kind of mercury catalyst production circulation of tail gas is using drying system and its drying
Method.So as to effectively reduce the discharge of tail gas, greatly reduce drying time, improve catalyst drying and dewatering efficiency compared with.
The present invention is achieved by following technical solution.
A kind of mercury catalyst production circulation of tail gas utilizes drying system, mainly by air-introduced machine, electric central warm air furnace, drying oven, activity
Carbon adsorption tower and scrubbing tower composition, the outlet of the air-introduced machine is connected with the import of electric central warm air furnace, the outlet of electric central warm air furnace with do
The import of dry stove is connected, and drying oven is connected with the import of scrubbing tower through activated carbon absorption tower, and the drying oven is inhaled with activated carbon
Also set up the predrying stove and aerator being sequentially connected between attached tower, the scrubbing tower enters through moisture trap and air-introduced machine
Mouth connection forms closed-loop path.
The outlet of the scrubbing tower is connected with tail gas blow-down pipe, is provided with perforate, connects in perforate on tail gas blow-down pipe
The circulating line A matched with open pore size is connected to, scrubbing tower is connected with moisture trap by circulating line A.
The activated carbon absorption tower is by the I level active carbon adsorption tower, II level active carbon adsorption tower and III grade of work being sequentially connected
Property carbon adsorption tower composition.
The outlet of the moisture trap is connected with the import of air-introduced machine by circulating line B.
The top of the moisture trap is provided with air vent.
The moisture trap bottom is provided with for discharging the blowoff valve of hydrops.
The scrubbing tower and tail gas blow-down pipe are made using PP materials.
As another object of the present invention, additionally provide a kind of mercury catalyst production circulation of tail gas and utilize drying meanss, which is led
Comprise the technical steps that：
(1) tail gas heating：Tail gas enters air-introduced machine entrance by circulating line B, enters electric central warm air furnace and add after air-introduced machine
Heat, makes gas temperature reach 120～150 DEG C；
(2) catalyst is dried：From the electric central warm air furnace described in step (1), out hot blast sequentially enters drying oven and predrying
Stove, the catalyst in drying oven after hot air seasoning are entered packaging process after obtaining the qualified catalyst of moisture content, are come from drying oven
Hot air temperature catalyst in predrying stove is carried out for 80～100 DEG C predrying；
(3) dust removal process：From predrying stove tail gas out through I level active carbon adsorption tower, II level active carbon adsorption tower
And III enter scrubbing tower after level active carbon adsorption tower and carry out dust removal process, and carried out by circulating line A entrance moisture traps
Recycle.
Exhaust temperature in step (3) from predrying stove out is 40～60 DEG C.
The invention has the beneficial effects as follows：
Compared with prior art, of the invention by carrying out process modification to air-introduced machine entrance, by the tail gas after washing
Moisture trap is introduced, dry gas can be obtained, then air stove is sent into by air-introduced machine, be recycled tail gas, not only
Discharge capacity is reduced, environmental pollution is reduced, and is reduced the dry time, 1 hour or so can be saved per stove, catalyst per ton
120 yuan/ton can be saved.Both environmental, while also creating benefit；The present invention is by the tail containing hydrargyrum in mercury catalyst production process
Gas is circulated utilization, and effective control heavy metal pollution discharge capacity reaches the effect of energy-saving and emission-reduction, with good society's effect
Benefit and economic benefit, can be in chemical technology field wide popularization and application.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
In figure：1- air-introduced machines, 2- electric central warm air furnaces, 3- drying ovens, the predrying stoves of 4-, 5- aerators, 6- activated carbon absorption towers,
7- scrubbing towers, 8- tail gas blow-down pipes, 9- circulating line A, 10- moisture traps, 11- circulating line B, I level active carbons of 61- adsorb
Tower, II level active carbon adsorption towers of 62-, III level active carbon adsorption towers of 63-.
Specific embodiment
Further describe technical scheme below in conjunction with the accompanying drawings, but claimed scope is not limited to institute
State.
As shown in figure 1, a kind of mercury catalyst production circulation of tail gas of the present invention utilizes drying system, mainly by air-introduced machine
1st, electric central warm air furnace 2, drying oven 3, activated carbon absorption tower 6 and scrubbing tower 7 are constituted, the outlet of the air-introduced machine 1 and electric central warm air furnace 2
Import is connected, and the outlet of electric central warm air furnace 2 is connected with the import of drying oven 3, and drying oven 3 is through activated carbon absorption tower 6 and scrubbing tower 7
Import be connected, also set up the predrying stove 4 and aerator 5 being sequentially connected between the drying oven 3 and activated carbon absorption tower 6,
The scrubbing tower 7 forms closed-loop path through moisture trap 10 with the inlet communication of air-introduced machine 1.Using the technical program, will
Tail gas after scrubbing tower 7 is washed introduces moisture trap 10, can obtain dry gas, then send into hot blast by air-introduced machine 1
Stove 2, is recycled tail gas, not only reduces discharge capacity, is reduced environmental pollution, and is reduced the dry time,
1 hour or so can be saved per stove, catalyst per ton can save 120 yuan/ton.
The outlet of the scrubbing tower 7 is connected with tail gas blow-down pipe 8, is provided with perforate, in perforate on tail gas blow-down pipe 8
The circulating line A9 matched with open pore size is connected with, scrubbing tower 7 is connected with moisture trap 10 by circulating line A9.
The activated carbon absorption tower 6 is by I level active carbon adsorption tower 61 being sequentially connected, II level active carbon adsorption tower 62 and III
Level active carbon adsorption tower 63 is constituted.
The outlet of the moisture trap 10 is connected with the import of air-introduced machine 1 by circulating line B11.
The top of the moisture trap 10 is provided with air vent.So, operationally, tail gas is from moisture trap 10
Portion is entered in container, because the proportion (air molecule amount is 29) of air will be weighed than the proportion (molecular weight of H2O is 18) of hydrone,
Through expansion and three road dividing plates after tail, the moisture content that carries secretly is separated along cylinder with action of gravity using buffering, in moisture trap
10 bottoms obtain dry tail gas, and tail gas is entered from the mouth of pipe of the distance away from moisture trap bottom 400MM, from moisture trap
The air vent on 10 tops is discharged.
10 bottom of the moisture trap is provided with for discharging the blowoff valve of hydrops.
The scrubbing tower 7 and tail gas blow-down pipe 8 are made using PP materials.
As another object of the present invention, additionally provide a kind of mercury catalyst production circulation of tail gas and utilize drying meanss, which is led
Comprise the technical steps that：
(1) tail gas heating：Tail gas enters 1 entrance of air-introduced machine by circulating line B11, enters electric hot-air after air-introduced machine 1
Stove 2 is heated, and makes gas temperature reach 120～150 DEG C；
(2) catalyst is dried：From the electric central warm air furnace 2 described in step (1), out hot blast sequentially enters drying oven 3 and predrying
Stove 4, the catalyst in drying oven 3 enter packaging process after obtaining the qualified catalyst of moisture content, from drying oven 3 after hot air seasoning
The hot air temperature for coming over carries out predrying for 80～100 DEG C to catalyst in predrying stove 4；
(3) dust removal process：Adsorb from the tail gas out of predrying stove 4 through I level active carbon adsorption tower 61, II level active carbon
Entering scrubbing tower 9 after tower 62 and III level active carbon adsorption tower 63 carries out dust removal process, and enters air water point by circulating line A9
Utilization is circulated from device 10.
Exhaust temperature in step (3) from predrying stove 4 out is 40～60 DEG C.
Embodiments of the invention：As shown in figure 1, the present invention is in use, the scrubbing tower 7 and outlet adopt PP materials
Material makes, the outlet connection tail gas of scrubbing tower 7 blow-down pipe 8, and the caliber of tail gas blow-down pipe 8 is 700mm, opens a diameter of on blow-down pipe
The hole of 700mm, and connection diameter is managed for the PP of 700mm in perforate, and PP pipes are accessed a diameter of 1500mm, high-order 2000mm
Moisture trap 10 top, make tail gas from 10 top of moisture trap enter container in, because of the proportion (air molecule of air
Measure and will weigh for the proportion (molecular weight of H2O be 18) 29) than hydrone, through expansion and three road dividing plates after tail, using buffering with
The moisture content that carries secretly is separated by action of gravity along cylinder, and 10 bottom of moisture trap just obtains dry tail gas, and tail gas is from away from air water
The mouth of pipe of 10 bottom 400mm distances of separator is entered, and is discharged from the air vent on 10 top of moisture trap；By being arranged on gas
The blowoff valve discharge hydrops of 10 bottom of water separator, tail gas enter 1 entrance of air-introduced machine by the PP pipelines of a diameter of 700mm, and
Enter electric central warm air furnace 2 to heat, make gas temperature reach 150 DEG C or so, hot blast sequentially enters drying oven 3 and predrying stove 4, dry
Catalyst in stove 3 enters packaging process after obtaining the qualified catalyst of moisture content, from the heat that drying oven 3 comes after hot air seasoning
About 80 DEG C or so of gas carries out predrying to catalyst in predrying stove 4, and about 40 DEG C or so of the tail gas of predrying stove 4 is through I grade of activity
Carbon adsorption tower 61, II level active carbon adsorption tower 62 and III level active carbon adsorption tower 63, enter back into after scrubbing tower 7 carries out dust removal process
Enter moisture trap 10 and be circulated utilization.
Claims (5)
1. a kind of mercury catalyst production circulation of tail gas utilizes drying system, mainly by air-introduced machine (1), electric central warm air furnace (2), drying oven
(3), activated carbon absorption tower (6) and scrubbing tower (7) composition, the import phase of the outlet of air-introduced machine (1) and electric central warm air furnace (2)
Even, the outlet of electric central warm air furnace (2) is connected with the import of drying oven (3), and drying oven (3) is through activated carbon absorption tower (6) and washing
The import of tower (7) is connected, it is characterised in that：Also set up between drying oven (3) and activated carbon absorption tower (6) and to be sequentially connected
Predrying stove (4) and aerator (5), scrubbing tower (7) are through moisture trap (10) and the inlet communication shape of air-introduced machine (1)
Into closed-loop path；Activated carbon absorption tower (6) are by I level active carbon adsorption tower (61), the II level active carbon absorption being sequentially connected
Tower (62) and III level active carbon adsorption tower (63) composition；The outlet of scrubbing tower (7) is connected with tail gas blow-down pipe (8), in tail
Gas blow-down pipe is provided with perforate on (8), is connected with the circulating line A (9) matched with open pore size in perforate, by circulation
Scrubbing tower (7) is connected by pipeline A (9) with moisture trap (10)；The outlet of moisture trap (10) passes through circulating line B
(11) it is connected with the import of air-introduced machine (1)；The top of moisture trap (10) is provided with air vent.
2. a kind of mercury catalyst production circulation of tail gas according to claim 1 utilizes drying system, it is characterised in that：The gas
Water separator (10) bottom is provided with for discharging the blowoff valve of hydrops.
3. a kind of mercury catalyst production circulation of tail gas according to claim 1 utilizes drying system, it is characterised in that：Described wash
Wash tower (7) and tail gas blow-down pipe (8) is made using PP materials.
4. a kind of mercury catalyst production circulation of tail gas utilizes drying meanss, it is characterised in that：Mainly comprise the technical steps that：
(1) tail gas heating：Tail gas enters air-introduced machine (1) entrance by circulating line B (11), enters electric heating after air-introduced machine (1)
Wind furnace (2) is heated, and makes gas temperature reach 120～150 DEG C；
(2) catalyst is dried：From the electric central warm air furnace (2) described in step (1), out hot blast sequentially enters drying oven (3) and predrying
Stove (4), the catalyst in drying oven (3) enter packaging process after obtaining the qualified catalyst of moisture content, from drying after hot air seasoning
The hot air temperature that stove (3) comes carries out predrying for 80～100 DEG C to catalyst in predrying stove (4)；
(3) dust removal process：Adsorb from predrying stove (4) tail gas out through I level active carbon adsorption tower (61), II level active carbon
Tower (62) and III level active carbon adsorption tower (63) enter scrubbing tower (9) afterwards and carry out dust removal process, and are entered by circulating line A (9)
Enter moisture trap (10) and be circulated utilization.
5. a kind of mercury catalyst production circulation of tail gas according to claim 4 utilizes drying meanss, it is characterised in that：The step
Suddenly the exhaust temperature in (3) from predrying stove (4) out is 40～60 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410379808.5A CN104197692B (en) | 2014-08-04 | 2014-08-04 | A kind of mercury catalyst production circulation of tail gas is using drying system and its drying meanss |
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| CN201410379808.5A CN104197692B (en) | 2014-08-04 | 2014-08-04 | A kind of mercury catalyst production circulation of tail gas is using drying system and its drying meanss |
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| CN104197692A CN104197692A (en) | 2014-12-10 |
| CN104197692B true CN104197692B (en) | 2017-03-15 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106196922B (en) * | 2016-08-05 | 2018-12-14 | 贵州省铜仁市万山区鸿发化工有限公司 | A kind of mercury catalyst switch type hot-air drying stove |
| CN109990460A (en) * | 2019-04-08 | 2019-07-09 | 东莞市天伟节能环保技术有限公司 | A kind of circulating heat supply system and its heat supply method |
| CN115070989A (en) * | 2022-06-02 | 2022-09-20 | 天津大沽化工股份有限公司 | System and method for drying EPS in closed gas circulation mode |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SE9601721L (en) * | 1996-05-06 | 1997-11-07 | Flaekt Ab | Wood drying plant and method for purifying a drying gas from a wood drying device |
| US7194822B2 (en) * | 2004-05-11 | 2007-03-27 | American Wood Dryers, Inc. | Systems for drying moisture-containing work pieces and methods for drying same |
| CN202555136U (en) * | 2012-05-05 | 2012-11-28 | 长葛市九州化工有限公司 | Tail gas purification device for mercuric chloride catalyst production |
| CN103542712A (en) * | 2012-07-17 | 2014-01-29 | 中国科学院工程热物理研究所 | Dry exhaust gas processing system |
| CN103693676B (en) * | 2013-12-12 | 2015-05-20 | 宁夏新龙蓝天科技股份有限公司 | Waste mercury catalyst recovery technology and waste mercury catalyst recovery device |
| CN103816944B (en) * | 2014-01-20 | 2015-09-09 | 云南契合投资有限公司 | A kind of environment-friendly type low mercury catalyst continuous production processes and device thereof |
| CN204027288U (en) * | 2014-08-04 | 2014-12-17 | 贵州省万山银河化工有限责任公司 | A kind of mercury catalyst is produced circulation of tail gas and is utilized drying system |
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