CN208356505U - A kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas - Google Patents
A kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas Download PDFInfo
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- CN208356505U CN208356505U CN201820303272.2U CN201820303272U CN208356505U CN 208356505 U CN208356505 U CN 208356505U CN 201820303272 U CN201820303272 U CN 201820303272U CN 208356505 U CN208356505 U CN 208356505U
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Abstract
The utility model relates to petrochemical plant field, specifically a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas.Including Catalyst Adsorption deduster, desulfurizing tower, water tank, absorbent storehouse, Desulphurization absorption deduster and chimney；The top of air inlet and desulfurizing tower that Desulphurization adsorbs deduster connects, the dust-exhausting port position that Desulphurization adsorbs deduster is equipped with ship type ash bucket, the import of ship type ash bucket is connect with the dust-exhausting port of Desulphurization absorption deduster, one way outlet of ship type ash bucket is connect with desulfurization ash cellar, another way outlet is connected with one end of air flume, and the other end of air flume is connected to the lower section on Venturi tube divergent segment and being located at atomizing lance；Smoke gas on-line monitor is equipped on chimney.The utility model has the advantages that desulfuration efficiency is high, particulate matter is up to standard, running damage, catalyst can recycle, desulfurizing byproduct is easily handled.
Description
Technical field
The utility model relates to petrochemical plant field, specifically a kind of half for catalytic cracking unit flue gas
Dry desulfurization dust pelletizing system.
Background technique
Catalytic cracking unit is play an important role in petroleum refining, and catalytically cracked material is the heavy oil product in crude oil,
Sulphur, nitrogen compound in raw material enter in regenerator with catalyst circulation, in catalytic cracking regenerator, the chemical combination of sulphur, nitrogen
A large amount of SO is generated after object and air catalytic combustion2With a small amount of SO3, these pollutants with flue gas be discharged into atmosphere will cause it is serious
Pollution.SO in regeneration fume from catalytic cracking2General 700 ~ the 3000mg/Nm of concentration3, SO3Concentration ~ 200mg/Nm3, particulate matter 100
~200mg/Nm3；Wherein particulate matter is largely catalyst, and particle diameter distribution is smaller, and under nominal situation, particle diameter distribution is 0 ~ 5 μm
Account for about 75%, 5 ~ 10 μm account for about 10 microns of 6 ~ 17%, > and account for 3 ~ 5% or so；Maximum concentration when CO waste heat boiler selective sootblowing
It can reach 3000 ~ 4000mg/Nm3, and when accident conditions largely run agent, the short time has tens ~ up to a hundred tons catalyst by cigarette
Gas is taken out of, containing heavy metal nickel and vanadium etc. in damaged catalyst, such as is discharged into atmosphere with flue gas, the particles floating in air with float
Dirt generally has very strong adsorption capacity, these harmful substances can be brought into the deep of Human Lung, cause respiratory disease, therefore
To these catalyst granules recycling and reusings.
" petroleum refining industry pollutant emission standard " GB31570-2015 regulation, from July 1st, 2017, distinguishingly
Area executes the special emission limit of atmosphere pollution: SO in catalytic cracking catalyst regenerated flue gas2≤50mg/Nm3, particulate matter≤
30mg/Nm3。
Flue gas desulfurization both at home and abroad mainly uses wet desulfurizing process at present, and equipment seriously corroded has waste water generation.To prevent
The main material matter of equipment corrosion, equipment uses stainless steel and steel alloy, and investment and operating cost is caused to increase.Using wet desulphurization skill
Art can realize that purifying smoke particle concentration is less than 30mg/Nm3, but moist catalysis particle disposal difficulty of getting up is larger, only by de-
The filtering module removing fine particulates and SO on sulphur tower top3Aerosol is difficult to realize clean emission；；In addition wet desulphurization pair
SO3Removal efficiency only has 30% or so, and removal efficiency is lower.
Patent ZL201410590103.8 provides a kind of catalytic cracking flue gas desulfurization and dust collecting process and its device, uses
Sodium alkali removes the SO in flue gas2, process flow is complicated, there is desulfurization waste liquor generation, and COD is easily exceeded in waste liquid, need mostly into
The processing of one step.
Utility model content
The utility model is intended to provide that a kind of desulfuration efficiency is high, particulate matter is up to standard, runs damage catalyst can recycle, take off
The easy-to-handle semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas of sulphur by-product.
In order to solve the above technical problems, the technical solution adopted in the utility model are as follows: one kind is used for catalytic cracking unit
The semi-dry desulphurization dust pelletizing system of flue gas, including Catalyst Adsorption deduster, desulfurizing tower, water tank, absorbent storehouse, Desulphurization absorption
Deduster and chimney；The air inlet of the Catalyst Adsorption deduster passes through the flue gas emission of water sealed tank and catalytic cracking unit
Pipeline is connected, and the dust-exhausting port of Catalyst Adsorption deduster is connected with catalyst recovery bin；The bottom of the desulfurizing tower is connected with perpendicular
Narrow section of the Venturi tube being directly arranged, Venturi tube is connected with the exhaust outlet of Catalyst Adsorption deduster, the flaring of Venturi tube
Atomizing lance is equipped in section, atomizing lance is connect with the water outlet of the water tank, and the divergent segment of Venturi tube is located at atomizing lance
Lower section be connected with one end of chute, the other end of chute is connected with the discharge port in the absorbent storehouse；The Desulphurization absorption
The air inlet of deduster and the top of desulfurizing tower connect, and the dust-exhausting port position that Desulphurization adsorbs deduster is equipped with ship type ash bucket, ship
The import of type ash bucket is connect with the dust-exhausting port of Desulphurization absorption deduster, and a way outlet of ship type ash bucket is connect with desulfurization ash cellar,
Another way outlet is connected with one end of air flume, and the other end of air flume is connected on Venturi tube divergent segment and is located at mist
Change the lower section of spray gun；The bottom of the chimney is connected with the exhaust outlet of air-introduced machine, and air inlet and the Desulphurization absorption of air-introduced machine remove
The exhaust outlet of dirt device is connected, and is equipped with smoke gas on-line monitor in the middle and lower part position of chimney.
Preferably, cycle flue is equipped between the exhaust outlet of air-introduced machine and the exhaust outlet of Catalyst Adsorption deduster,
Cycle flue is equipped with pneumatic baffle.
Preferably, equal equipped with the flue gas for being discharged from Catalyst Adsorption deduster exhaust outlet at narrow section of the Venturi tube
The even deflector into Venturi tube.
Preferably, one end that the chute is connect with absorbent storehouse is equipped with to be entered in chute for the absorbent in absorbent storehouse
Frequency conversion dispenser, absorbent enters Venturi tube by chute by the fluidized wind that pneumatic conveying pipeline provides.
Preferably, the absorbent held in the absorbent storehouse is the calcium hydroxide of 300-400 mesh and purity >=90%.
Preferably, roof scrubber is equipped at the top in the absorbent storehouse.
Preferably, high-pressure hydraulic pump is equipped in the connecting pipeline between water tank and atomizing lance.
Preferably, the Desulphurization absorption deduster is bag filter.
Preferably, it is equipped with surge bunker between the dust-exhausting port and desulfurization ash cellar of Desulphurization absorption deduster, buffered
Pneumatic conveyer is equipped between storehouse and desulfurization ash cellar.
Preferably, twin shaft humidifier is equipped in the ash discharging hole of the desulfurization ash cellar.
Beneficial effect
Compared with prior art, the utility model has the advantage that
(1) the utility model for the first time combines the recvery facility for running damage catalyst with semi-dry process flue gas desulphurization, both into one
Step has recycled catalyst, reduces high value catalyst attrition bring economic loss, and greatly reduce in flue gas subtle
Grain object discharge, solves problem of environmental pollution.
(2) the utility model desulfurizing agent primary raw material is that finished product is packed or calcium hydroxide in bulk, resourceful, cheap,
Operating cost is low.
(3) the utility model process flow is simple, generates in sweetening process without waste water, the Ordinary solid waste of generation without
Evil can be used as construction material, mine landfill etc., and utility value is big, processing channel is wide.
(4) semi-dry desulphurization system used in the utility model is being higher than 30 DEG C of flue gas dew point temperature or so operations, and
SO2、SO3It substantially completely removes, etching problem is not present, system is without anti-corrosion；80 ~ 90 DEG C of exhaust gas temperature, no white haze phenomenon.
(5) the utility model has done Optimal improvements to the ash discharge mode of Desulphurization in desulfurization ash cellar, can be set to do, wet ash
Two kinds of ash discharge modes make Desulphurization adapt to different processing approach, increase the selection space of user.
(6) absorbent that desulphurization reaction is participated in the utility model repeats after the absorption of Desulphurization absorption deduster
It is recycled in back to desulfurizing tower, to improve utilization efficiency.The smoke gas on-line monitor being arranged on chimney can be to Desulphurization
The flue gas after desulfurization of absorption deduster exhaust outlet discharge is monitored in real time, once monitor SO2Reach the early warning of discharge standard
Value then can immediately be accessed Desulphurization absorption deduster dust-exhausting port in desulfurization ash cellar by ship type ash bucket, while by fresh suction
It receives agent to be entered in desulfurizing tower by absorbent storehouse by chute, substantially increases the utilization efficiency of absorbent.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Marked in the figure: 1, desulfurization ash cellar, 2, air flume, 3, pneumatic baffle, 4, Venturi tube, 5, catalyst recovery bin,
6, water sealed tank, 7, Catalyst Adsorption deduster, 8, chute, 9, absorbent storehouse, 10, water tank, 11, high-pressure hydraulic pump, 12, desulfurizing tower,
13, Desulphurization adsorbs deduster, 14, ship type ash bucket, 15, air-introduced machine, 16, smoke gas on-line monitor, 17, chimney, 18, buffering
Storehouse.
Specific embodiment
As shown in Figure 1, a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas of the utility model, packet
Include Catalyst Adsorption deduster 7, desulfurizing tower 12, water tank 10, absorbent storehouse 9, Desulphurization absorption deduster 13 and chimney 17.
The air inlet of Catalyst Adsorption deduster 7 is connected by water sealed tank 6 with the flue gas emission pipeline of catalytic cracking unit,
The dust-exhausting port of Catalyst Adsorption deduster 7 is connected with catalyst recovery bin 5, by Catalyst Adsorption deduster 7 by flue gas 0 ~
10 μm of the catalyst fine particle for being difficult to be filtered out He easily fleeing from is recycled, and is collected in catalyst recovery bin 5, is avoided
While catalyst contamination, the utilization efficiency of catalyst is improved.
The bottom of desulfurizing tower 12 is connected with the Venturi tube 4 being vertically arranged, and narrow section of Venturi tube 4 is removed with Catalyst Adsorption
The exhaust outlet of dirt device 7 is connected, and atomizing lance, the water outlet company of atomizing lance and water tank 10 are equipped in the divergent segment of Venturi tube 4
It connects, the lower section that the divergent segment of Venturi tube 4 is located at atomizing lance is connected with one end of chute 8, the other end and absorbent of chute 8
The discharge port in storehouse 9 is connected.Flue gas after removing catalyst enters in the Venturi tube 4 of 12 bottom of desulfurizing tower, in Venturi tube 4
Narrow section be equipped with deflector, may make flue gas even into.Absorbent in absorbent storehouse 9 is by being arranged in 8 one end of chute
Frequency conversion dispenser, 8 ontology of chute enter the divergent segment of Venturi tube 4 under pneumatic conveying effect.Water is being atomized by setting
High-pressure hydraulic pump 11 between spray gun and water tank 10 is sprayed into tower by atomizing lance, is made flue gas, absorbent and atomized water contact, is filled
Divide mixing, and then removes the SO in flue gas2、SO3.On the one hand the addition of atomized water reduces flue-gas temperature in tower, on the other hand makes
Obtain SO2、SO3It is converted into ionic reaction with reacting for calcium hydroxide, improves reaction efficiency.
The top in the absorbent storehouse 9 in the present embodiment is equipped with roof scrubber, for absorbing in charging or orlop fluidisation
The silo roof exhaust dust-removing in agent storehouse 9.The absorbent held in absorbent storehouse 9 is the calcium hydroxide of 300-400 mesh and purity >=90%.
The air inlet of Desulphurization absorption deduster 13 is connect with the top of desulfurizing tower 12, and Desulphurization adsorbs the row of deduster 13
Dirt mouth position is equipped with ship type ash bucket 14, and the import of ship type ash bucket 14 is connect with the dust-exhausting port of Desulphurization absorption deduster 13, ship type
One way outlet of ash bucket 14 is connect with desulfurization ash cellar 1, and another way outlet is connected with one end of air flume 2, air flume 2 it is another
One end is connected to the lower section on 4 divergent segment of Venturi tube and being located at atomizing lance.The bottom of chimney 17 and the air draft of air-introduced machine 15
Mouth is connected, and the air inlet of air-introduced machine 15 is connected with the exhaust outlet of Desulphurization absorption deduster 13, in the middle and lower part position of chimney 17
Equipped with smoke gas on-line monitor 16.
Flue gas after desulfurization enters Desulphurization under the power effect of air-introduced machine 15 from 12 top of desulfurizing tower and adsorbs deduster
13 are dusted, and the material filtered down through Desulphurization absorption deduster 13 is solid particle, since reaction depth is inadequate, material
In still do not participate in the absorbent of reaction containing part, therefore material needs to be recycled, this is partially absorbed agent weight by the utility model
It is new to be accessed in the Venturi tube 4 of 12 bottom of desulfurizing tower by ship type ash bucket 14 and air flume 2, make the partial material continue to play
Effect.And when smoke gas on-line monitor 16 detects SO2When reaching the early warning value of discharge standard, then Desulphurization can be adsorbed immediately
13 dust-exhausting port of deduster is accessed in desulfurization ash cellar 1 by ship type ash bucket 14, while fresh absorbent being passed through by absorbent storehouse 9
Chute 8 is discharged into desulfurizing tower 12, substantially increases the utilization efficiency of absorbent.
It is bag filter that Desulphurization, which adsorbs deduster 13, and cloth bag uses PPS material.Bag filter outlet, which is equipped with, draws
Blower 15, air-introduced machine 15 make whole system be in micro-vacuum state, avoid leakage, the fugitive dust of dust.Dedusting is adsorbed in Desulphurization
It is equipped with surge bunker 18 between the dust-exhausting port and desulfurization ash cellar 1 of device 13, pneumatic conveying is equipped between surge bunker 18 and desulfurization ash cellar 1
Device.During regular ash discharge or parking maintenance, Desulphurization is first collected by Pneumatic conveyer to surge bunker 18, then passes through gas
Power conveying device is sent to desulfurization ash cellar 1.Desulphurization main component is CaSO3・1/2H2O、CaSO4・1/2H2O、CaCO3And unreacted
Ca (OH)2.Main application is abandoned mine well landfill, fills out dike, soil backfill, express highway roadbed, building trade concrete brick
Stripping and slicing, non-burning brick, steam-pressing brisk, cement admixture etc..For different processing channels, it is designed to do, wet two kinds of ash discharge modes.It is excellent
First go out dry ash: when handling dry ash, the entrucking measure that anti-dry ash is flown upward is set；Wet ash out: setting humidifies the twin shaft of dry ash damping
Machine.
It is equipped with cycle flue between the exhaust outlet of air-introduced machine 15 and the exhaust outlet of Catalyst Adsorption deduster 7, is recycling
Flue is equipped with pneumatic baffle 3.When catalytic cracking unit flue gas load is lower, in order to maintain the air-flow in desulfurizing tower 12 opposite
Stablize, guarantee the optimal operational condition of desulfurization, is lower than 15 exit static pressure of air-introduced machine using the static pressure of 12 inlet flue duct of desulfurizing tower, no
Additionally mounted pumping blower is needed, is entered the Partial cleansing flue gas recirculation in 15 downstream of air-introduced machine to desulfurizing tower 12 by cycle flue
Mouthful, 13 exhaust pass exhaust gas volumn of deduster is adsorbed according to Desulphurization, adjusts the pneumatic baffle 3 on cycle flue to adjust circulation cleaning
The flow of clean flue gas makes the flow velocity of Venturi tube 4 keep relative stability.In design and operation, the operation cigarette of general desulfurizing tower 12
The design discharge that tolerance is 70%~110%, to guarantee desulfurizing tower 12 optimal heat transfer, mass transfer conditions in underrun.
Once 12 inlet flow rate of desulfurizing tower is lower than 70% load, openable pneumatic baffle 3 supplements required cleaning flue gases, reaches exhaust gas volumn
To more than 70% load.
Claims (10)
1. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas, it is characterised in that: including Catalyst Adsorption
Deduster (7), desulfurizing tower (12), water tank (10), absorbent storehouse (9), Desulphurization absorption deduster (13) and chimney (17)；Institute
The air inlet for stating Catalyst Adsorption deduster (7) is connected by water sealed tank (6) with the flue gas emission pipeline of catalytic cracking unit, is urged
The dust-exhausting port of agent absorption deduster (7) is connected with catalyst recovery bin (5)；The bottom of the desulfurizing tower (12) is connected with vertically
Narrow section of the Venturi tube (4) of setting, Venturi tube (4) is connected with the exhaust outlet of Catalyst Adsorption deduster (7), Venturi tube
(4) atomizing lance is equipped in divergent segment, atomizing lance is connect with the water outlet of the water tank (10), and Venturi tube (4) is gradually
The lower section that expansion section is located at atomizing lance is connected with one end of chute (8), the other end of chute (8) and the absorbent storehouse (9)
Discharge port is connected；The air inlet of Desulphurization absorption deduster (13) is connect with the top of desulfurizing tower (12), Desulphurization absorption
The dust-exhausting port position of deduster (13) is equipped with ship type ash bucket (14), and the import of ship type ash bucket (14) and Desulphurization adsorb deduster
(13) dust-exhausting port connection, a way outlet of ship type ash bucket (14) are connect with desulfurization ash cellar (1), another way outlet and air flume
(2) one end is connected, and the other end of air flume (2) is connected on Venturi tube (4) divergent segment and is located under atomizing lance
Side；The bottom of the chimney (17) is connected with the exhaust outlet of air-introduced machine (15), and the air inlet and Desulphurization of air-introduced machine (15) adsorb
The exhaust outlet of deduster (13) is connected, and is equipped with smoke gas on-line monitor (16) in the middle and lower part position of chimney (17).
2. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
It is: is equipped with cycle flue between the exhaust outlet of air-introduced machine (15) and the exhaust outlet of Catalyst Adsorption deduster (7), is recycling
Flue is equipped with pneumatic baffle (3).
3. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
Be: be equipped at narrow section of the Venturi tube (4) for the flue gas that is discharged from Catalyst Adsorption deduster (7) exhaust outlet uniformly into
Enter the deflector in Venturi tube (4).
4. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
Be: one end that the chute (8) connect with absorbent storehouse (9), which is equipped with, enters chute (8) for the absorbent in absorbent storehouse (9)
In frequency conversion dispenser, the fluidized wind that absorbent is provided by pneumatic conveying pipeline enters Venturi tube (4) by chute (8).
5. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
Be: the absorbent held in the absorbent storehouse (9) is the calcium hydroxide of 300-400 mesh and purity >=90%.
6. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
It is: is equipped with roof scrubber at the top of the absorbent storehouse (9).
7. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
It is: is equipped with high-pressure hydraulic pump (11) in the connecting pipeline between water tank (10) and atomizing lance.
8. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
Be: Desulphurization absorption deduster (13) is bag filter.
9. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
It is: is equipped with surge bunker (18) between the dust-exhausting port and desulfurization ash cellar (1) of Desulphurization absorption deduster (13), is buffering
Pneumatic conveyer is equipped between storehouse (18) and desulfurization ash cellar (1).
10. a kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas according to claim 1, feature
It is: is equipped with twin shaft humidifier in the ash discharging hole of the desulfurization ash cellar (1).
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| CN201820303272.2U CN208356505U (en) | 2018-03-06 | 2018-03-06 | A kind of semi-dry desulphurization dust pelletizing system for catalytic cracking unit flue gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170238A (en) * | 2019-06-14 | 2019-08-27 | 无锡市东方环境工程设计研究所有限公司 | The desulphurizing and dust-removing integral system of the flue gas containing ultrafine dust |
| CN110917862A (en) * | 2019-12-03 | 2020-03-27 | 河北净空环保工程有限公司 | Semi-dry desulfurization device for pushing fluidized bed |
| CN111214933A (en) * | 2019-11-07 | 2020-06-02 | 西安西矿环保科技有限公司 | Sintering flue gas desulfurization system and method |
| CN112263900A (en) * | 2020-10-20 | 2021-01-26 | 深圳市凯盛科技工程有限公司 | Flue gas desulfurization, denitrification and dust removal device for industrial kiln |
| CN113144877A (en) * | 2021-04-08 | 2021-07-23 | 江门市同力环保科技有限公司 | Semi-dry desulfurization and dust removal method for waste gas of sludge sintered ceramic ceramsite |
| CN115301013A (en) * | 2021-05-05 | 2022-11-08 | 上海梅山钢铁股份有限公司 | Green environment-friendly dust-free suction device and method |
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- 2018-03-06 CN CN201820303272.2U patent/CN208356505U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170238A (en) * | 2019-06-14 | 2019-08-27 | 无锡市东方环境工程设计研究所有限公司 | The desulphurizing and dust-removing integral system of the flue gas containing ultrafine dust |
| CN111214933A (en) * | 2019-11-07 | 2020-06-02 | 西安西矿环保科技有限公司 | Sintering flue gas desulfurization system and method |
| CN111214933B (en) * | 2019-11-07 | 2024-03-15 | 西安西矿环保科技有限公司 | Sintering flue gas desulfurization system and method |
| CN110917862A (en) * | 2019-12-03 | 2020-03-27 | 河北净空环保工程有限公司 | Semi-dry desulfurization device for pushing fluidized bed |
| CN112263900A (en) * | 2020-10-20 | 2021-01-26 | 深圳市凯盛科技工程有限公司 | Flue gas desulfurization, denitrification and dust removal device for industrial kiln |
| CN113144877A (en) * | 2021-04-08 | 2021-07-23 | 江门市同力环保科技有限公司 | Semi-dry desulfurization and dust removal method for waste gas of sludge sintered ceramic ceramsite |
| CN115301013A (en) * | 2021-05-05 | 2022-11-08 | 上海梅山钢铁股份有限公司 | Green environment-friendly dust-free suction device and method |
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