CN109745803A - Flue gas washing method and catalytic cracking method - Google Patents

Flue gas washing method and catalytic cracking method Download PDF

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Publication number
CN109745803A
CN109745803A CN201810491397.7A CN201810491397A CN109745803A CN 109745803 A CN109745803 A CN 109745803A CN 201810491397 A CN201810491397 A CN 201810491397A CN 109745803 A CN109745803 A CN 109745803A
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China
Prior art keywords
flue gas
water
clean water
absorbing liquid
cleaning
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CN201810491397.7A
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Chinese (zh)
Inventor
宋海涛
姜秋桥
王鹏
孙言
林伟
田辉平
张久顺
达志坚
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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Sinopec Research Institute of Petroleum Processing
China Petroleum and Chemical Corp
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Application filed by Sinopec Research Institute of Petroleum Processing , China Petroleum and Chemical Corp filed Critical Sinopec Research Institute of Petroleum Processing
Priority to CN202311735143.2A priority Critical patent/CN118320548A/en
Publication of CN109745803A publication Critical patent/CN109745803A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/14—Packed scrubbers
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1406—Multiple stage absorption
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    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01D—SEPARATION
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    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
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    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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    • B01D53/1481—Removing sulfur dioxide or sulfur trioxide
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    • B01D53/1493—Selection of liquid materials for use as absorbents
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    • B01D53/34—Chemical or biological purification of waste gases
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    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
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    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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    • B01D53/46—Removing components of defined structure
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/96—Regeneration, reactivation or recycling of reactants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01D2252/103—Water
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    • B01D2258/0283—Flue gases
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    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/70—Catalyst aspects
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    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract

The present disclosure relates to a flue gas scrubbing process and a catalytic cracking process. The flue gas washing method comprises the following steps: introducing the flue gas into a flue gas washing tower to contact with absorption liquid containing an absorbent, and contacting the flue gas contacted with the absorption liquid with clean water before the flue gas is discharged from the tower. The flue gas washing method provided by the disclosure is simple, quick and easy to implement, can effectively eliminate the phenomenon of flue gas tailing of a wet washing tower, and solves the problem of blue smoke and smoke plume sinking.

Description

Method for washing flue gas and catalyst cracking method
Technical field
This disclosure relates to a kind of method for washing flue gas and catalyst cracking method.
Background technique
In industrial processes, especially in some production processes containing heat treatment step (dry, roasting, burning etc.) In, the exhaust gas such as the tail gas containing pollutant or flue gas can be generated.For example, part during catalytic cracking (FCC), in raw material Sulphur, nitrogen compound enter coke laydown on reclaimable catalyst in riser reaction process, and spent agent enters regenerator and burns When regeneration, sulphur, nitrogen compound oxidation in these coke generate SOx、NOxEqual flue gas pollutants.For another example, the nothings such as catalyst production In machine chemical process, whens heat resolves such as sulfate, nitrate, villaumite for containing in raw material, can be generated containing SOx、NOx、 Cl2, the pollutants and pernicious gas such as HCl tail gas.These flue gases and tail gas containing pollutant and pernicious gas need to be by purifications It could qualified discharge after processing.
Power generation, petrochemical industry, inorganization is had been widely used for by the wet scrubbing technology of core equipment of wet scrubbing tower The flue gas and tail gas clean-up of the industrial process such as work are handled.Although process flow and structure have certain difference, its basic principle is all It is that the pollutant in gas phase is absorbed into liquid phase by gas-liquid contact, achievees the purpose that purifying smoke or tail gas.United States Patent (USP) US20070189949A1 discloses a kind of wet scrubbing system for regeneration fume from catalytic cracking processing, by washing alkalinity It washs liquid and flue gas and carries out spray and contact, efficient removal SO may be implemented2While trap dust effect.
But also gradually there are some problems for discovery wet scrubbing process in industry park plan；Such as be also easy to produce flue gas hangover and The problems such as blue plume sinks causes to seriously affect to plant area and periphery production and living environment.
Summary of the invention
Purpose of this disclosure is to provide a kind of method for washing flue gas and catalyst cracking methods, to solve existing and newly-built wet process The flue gas of washing system trails and subsidence problems, reduces the adverse effect to plant area and periphery production and living environment.
To achieve the goals above, disclosure first aspect: providing a kind of method for washing flue gas, this method comprises: by cigarette Gas introduce flue gas scrubber contacted with the absorbing liquid containing absorbent, and by the flue gas after being contacted with the absorbing liquid before tower out and Clean water contact.
Optionally, the ratio of the clean water and flue gas are as follows: 0.001-0.5kg water/Nm3Flue gas.
Optionally, the clean water is selected from least one of fresh water, middle water and waste water Jing Guo desalting processing；
Preferably, the soluble solid content of the clean water is not higher than the cigarette collected by the exhanst gas outlet of the scrubbing tower The soluble solid content for the condensate that is gas-cooled, it is preferable that the soluble solid content of the clean water is not higher than 0.01 weight %.
Optionally, the flue gas is that exhaust gas, the combustion furnace generated selected from FCC regenerated flue gas, steam power plant's tail gas, boiler generates Exhaust gas and at least one of the exhaust gas that generates of calcining furnace；
The temperature of the flue gas is 50-500 DEG C, preferably 100-300 DEG C.
Optionally, the flue gas contains pollutant, and the pollutant includes SOx, NOx, NH3、CO、CO2、Cl2, HCl and At least one of solid dust；
Preferably, the flue gas contains: concentration 20-10000mg/m3SOx, concentration 20-2000mg/m3NOx, And concentration is 10-1000mg/m3Solid dust；Wherein, the concentration is the concentration under standard state.
Optionally, absorbing liquid spray equipment and cleaning water spray are disposed with along flow of flue gas direction in the scrubbing tower Device, the cleaning water spray system include the cleaning (operating) water nozzle for spraying clean water, so that after absorbing liquid contact Flue gas contacted before tower out with clean water；
The pump discharge pressure of the clean water is 0.1-10MPa, preferably 0.1-1.0MPa.
Optionally, the flue gas scrubber include scrubbing tower tower body and with the scrubbing tower tower body be in fluid communication chimney, The cleaning (operating) water nozzle is located in the chimney.
Optionally, it is additionally provided with clean water fluid reservoir between the cleaning water spray system and absorbing liquid spray equipment, uses In collection and the clean water after smoke contacts；
Collected washing water can be sent to the cleaning water spray system with recycle for the smoke contacts, and/ Or, the supplement water that the washing water can be used as absorbing liquid is sent to the absorbing liquid spray equipment.
Optionally, the quantity of the absorbing liquid spray equipment and cleaning water spray system is respectively one or more levels, along cigarette The flow direction of gas, the clean water fluid reservoir are located at absorbing liquid spray described in cleaning (operating) water nozzle and afterbody described in the first order Between device.
Optionally, the quantity of the cleaning (operating) water nozzle is 1~12；When the quantity more than one of the cleaning (operating) water nozzle, The cleaning (operating) water nozzle is circumferentially and/or radial direction is equally spaced；
The cleaning (operating) water nozzle is selected from least one of spiral nozzle, fan nozzle and nozzle ring.
Optionally, this method further include: the flue gas after contacting described in enabling with absorbing liquid first passes through gas-liquid contact reinforcing elements (14), it then with the clean water contacts, the gas-liquid contact reinforcing elements are filler and/or column plate.
Optionally, the pH value of the absorbing liquid is 5-10, preferably 6-8；
The absorbent is at least one of soluble hydroxide and soluble-salt of alkali metal of alkali metal；It is preferred that Ground, the absorbent be in sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, saleratus and potassium hydroxide at least It is a kind of.
Disclosure second aspect: providing a kind of catalyst cracking method, this method comprises: hydrocarbon ils to be contacted to progress with catalyst Catalytic cracking reaction regenerates the catalyst after reaction, and the flue gas for then generating the regeneration is according to the disclosure first Method described in aspect is washed；
The catalyst contains the sulfur transfer additive of 0.1-10 weight %, preferably comprises the sulfur transfer additive of 1-5 weight %, described Sulfur transfer additive under the regeneration condition for reducing the SOx concentration in flue gas.
Optionally, this method further include: the flue gas is first subjected to waste heat recycling, then carries out the step of the washing again Suddenly.
Through the above technical solutions, the method for washing flue gas that the disclosure provides is simple and easy, by enabling flue gas before tower out It is contacted with clean water, flue gas trailing length is reduced or disappeared, and blue smoke is eliminated, no plume sinkage.Disclosed method can be Existing scrubbing tower is simply transformed or is implemented in the case where being hardly transformed, does not influence the operation of scrubbing tower and upstream device Elasticity, while additionally aiding and slowing down equipment corrosion.Disclosed method is at low cost, can be used for the flue gas or tail of various industrial process Gas disposal, including power generation, petrochemical industry, inorganic chemical industry etc..
In addition, the catalyst cracking method that the disclosure provides can remove cigarette by the way that sulfur transfer additive is added in the catalyst in advance SOx in gas reduces operational load and the absorbing liquid consumption of flue gas scrubber, the method for washing flue gas knot provided with the disclosure It closes, is more advantageous to and solves the problems, such as that flue gas hangover and plume are sunk.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of flue gas scrubber used by embodiment 1；
Fig. 2 is the schematic diagram that the arrangement mode of (operating) water nozzle is cleaned in flue gas scrubber used by embodiment 1；
Wherein, the arrow direction in figure refers to the direction of motion of fluid.
Description of symbols
1 absorbent solution and water make up line
2 smoke inlets
3 scrubbing tower tower bodies
4 absorbent solutions and water make up line
5 chimneys
6 exhanst gas outlets
7 clean water transfer pumps
8 cleaning (operating) water nozzles
9 absorbing liquid circulating pumps
10 absorb nozzle for liquid
11 absorbing liquid circulating pumps
12 efflux wastewater pipelines
13 clean water fluid reservoirs
14 gas-liquid contact reinforcing elements
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower " typically refers to system reality Upper and lower when border works, " inside and outside " is for profile of structure itself.
Disclosure first aspect: providing a kind of method for washing flue gas, this method comprises: by flue gas introduce flue gas scrubber with Absorbing liquid contact containing absorbent, and the flue gas after contacting with the absorbing liquid is contacted before tower out with clean water.
The method for washing flue gas that the disclosure provides is simple and easy, by enabling flue gas contact before tower out with clean water, can have Effect eliminates wet scrubbing tower flue gas trailing phenomenon, solves blue smoke and plume subsidence problems.
According to the disclosure, the magnitude of recruitment of fresh clean water (referring to the clean water that do not cross with smoke contacts) and the ratio of flue gas are logical Often it is no more than 0.15kg/Nm3, preferably 0.001-0.05kg/Nm3.In the preferred embodiment of the disclosure, clean water can be received It is recycled after collection, to reuse and increase spray flow, the clean water (spray total amount, i.e., it is clear with the smoke contacts The amount of clean water) it can be with the ratio of flue gas are as follows: 0.001-0.5kg water/Nm3Flue gas, preferably 0.01-0.2kg water/Nm3Flue gas, Middle Nm3Refer to the gas volume under the status of criterion.
According to the disclosure, the clean water can in fresh water, middle water and waste water Jing Guo desalting processing extremely Few one kind.The clean water can also be for what is be recycled, i.e., with the clean water after smoke contacts after collecting, circulation is used In with smoke contacts.Further, soluble solid content (the also referred to as total dissolved solid content or total of the clean water Salt content) not higher than the soluble solid content for the flue gas condensing water collected by the exhanst gas outlet of the scrubbing tower, it is preferable that institute The soluble solid content of clean water is stated not higher than 0.01 weight %.In addition, according to actual needs, the clean water can also contain There is additive, as long as the solution total solid content increase of absorbing liquid will not be made by meeting the additive, the additive Type does not have special limitation, such as can include but is not limited to defoaming agent etc..The disclosure is not special to the temperature of clean water It is required that common room temperature coolant-temperature gage, the temperature that ordinary circumstance is lauched is no more than 90 DEG C of such as 0-90 or 1-80 DEG C or 10-60 DEG C or 5-50 DEG C, preferably 5-35 DEG C.
According to the disclosure, the flue gas can be the flue gas generated from power plant, petrochemical plant, inorganization factory (or tail gas), for example, FCC regenerated flue gas, steam power plant's tail gas, boiler generate exhaust gas, combustion furnace generate exhaust gas and calcining furnace produce Raw exhaust gas etc..The temperature of the usual flue gas can be 50-500 DEG C, preferably 100-300 DEG C.
According to the disclosure, the flue gas contains pollutant, and the pollutant can be for selected from SOx, NOx, NH3、CO、CO2、 Cl2, at least one of HCl and solid dust.For example, the flue gas can contain SOx, CO2, CO, NOx and/or solid powder Dirt.Further, the flue gas can contain: concentration 20-10000mg/m3Such as 100-5000mg/m3SOx, concentration is 20-2000mg/m3NOx and concentration be 10-1000mg/m3Such as 30-500mg/m3Solid dust；Wherein, described dense Degree is the concentration under standard state.
In the method for washing flue gas of the disclosure, flue gas is first introduced into flue gas scrubber and is contacted with the absorbing liquid containing absorbent, To absorb the pollutant removed in flue gas.The operating method of absorption can refer to prior art progress, and the disclosure does not have particular/special requirement. The absorbing liquid is the mixture of absorbent and water.The absorbent can for alkali or alkaline earth metal for example sodium, potassium, magnesium, At least one of the soluble hydroxide and soluble-salt of calcium or alkaline kation such as ammonium；Preferably, the absorbent can Think selected from least one of sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, saleratus and potassium hydroxide.It can incite somebody to action The absorbent is first dissolved in water and is prepared into the absorbent solution with a certain concentration (such as 10~40 weight %), then will be described Absorbent solution is sent into absorbing liquid spray equipment individually through pipeline, meanwhile, it is another that absorbing liquid spray is fed the water by pipeline Shower device, i.e. absorbent solution and water, which are sent into flue gas scrubber by pipeline respectively and are entered in absorbing liquid circulating system, (such as to be sent Enter in absorbing liquid fluid reservoir), it is then sufficiently mixed after so that absorbing liquid is reached required pH value, is delivered to absorption through absorbing liquid circulating pump Nozzle for liquid carries out spray with flue gas and contacts.The pH value of the absorbing liquid can be 5-10, for example, the absorbing liquid pH in 6-8 or 6.5-9.The absorbing liquid recycles, and absorbent solution and water is continuously replenished according to its pH value, while efflux wastewater is kept The liquid level of absorbing liquid is basicly stable.Ozone can also be passed through in flue gas as needed, by the nitrogen oxides of lower valency For the nitrogen oxides of high-valence state, it is convenient for and alkali substance reaction.Outside with the absorbing liquid (or being efflux wastewater) after smoke contacts Discharge capacity can be adjusted according to dissolvability solid amount in liquid level in absorption liquid storage tank or absorbing liquid, the dissolubility of usual efflux wastewater Solid total solids content is in 0.1-10 weight %, preferably 2-8 weight %.
Disclosed method can be implemented in the case where being simply transformed existing scrubbing tower or being hardly transformed, not shadow The operating flexibility of scrubbing tower and upstream device is rung, while additionally aiding and slowing down equipment corrosion.
Disclosed method can be increased by the top of the afterbody in flue gas scrubber absorbing liquid spray equipments at different levels Add one or more levels cleaning water spray system to carry out the spray of clean water, or is directly changed to afterbody absorbing liquid spray equipment Water spray system is cleaned to implement, such as can be carried out in flue gas scrubber as shown in Figure 1.In a kind of embodiment party of the disclosure In formula, absorbing liquid spray equipment and cleaning water spray system successively can be set along flow of flue gas direction in the scrubbing tower, The cleaning water spray system includes the cleaning (operating) water nozzle 8 for spraying clean water, so that the cigarette after absorbing liquid contact Gas is contacted before tower out with clean water.The nozzle can be any nozzle in the prior art, for example, spiral nozzle, sector The nozzle of cleaning water atomization may be implemented in nozzle, nozzle ring and pressure atomized fog jet of various hole shapes etc., preferably Spiral nozzle.The cleaning water pump discharge pressure does not have particular/special requirement, as long as water can be made in nozzle atomization, such as can be with For 0.1-10MPa, preferably 0.1-1.0MPa.
In a kind of optional embodiment of the disclosure, with reference to Fig. 1, the flue gas scrubber may include scrubbing tower tower body 3 and the chimney 5 that is in fluid communication with the scrubbing tower tower body 3, smoke inlet 2 is set to the lower part of the scrubbing tower tower body 3, flue gas Outlet 6 is set to the top of the chimney 2.Generally, the structure in chimney 5 is more simple compared in scrubbing tower tower body 3, therefore, It is engineered easy to implement in order to make, the setting cleaning water spray system preferably in the chimney 5, that is, the cleaning (operating) water nozzle 8 In the chimney 5.In addition, the cleaning (operating) water nozzle 8 is located in the chimney 5, flue gas can be made to pass through before it will go out tower Clean water spray, remove smoke trailing phenomenon to the greatest extent, solve blue smoke and plume subsidence problems, and do not influence scrubbing tower and The operating flexibility of upstream device, while additionally aiding and slowing down equipment corrosion.
According to the disclosure, the amount of pollutant that clean water is absorbed after contacting with the primary spray of flue gas progress is limited, can incite somebody to action It is recycled after collecting.Therefore, in an embodiment of the present disclosure, the cleaning water spray system and absorbing liquid spray Clean water fluid reservoir 13 is also provided between device, for collecting and the clean water (also referred to as washing water) after smoke contacts. Collected washing water can be sent to the cleaning water spray system with recycle for the smoke contacts, and/or, it is described clear The supplement water that clean water can be used as absorbing liquid is sent to the absorbing liquid spray equipment.The cleaning (operating) water nozzle 8 is stored up with clean water Flow container 13 can be connected by pipeline with clean water transfer pump 7 respectively, in this way, collecting the cleaning of spray by clean water fluid reservoir 13 Circulation conveying to cleaning (operating) water nozzle 8 is sprayed after water can be pressurizeed by clean water transfer pump 7, effectively improves the benefit of clean water With rate, while improving the spray flow of clean water.In addition, the clean water fluid reservoir 13 can also have clean water fluid reservoir overflow Mouthful, which is connected with the clean water overflow line 19 for extending to the cleaning solution spray equipment.Overflow The effect of mouth is well known to those skilled in the art, when the liquid level in clean water fluid reservoir 13 is excessively high and reaches the clean water liquid storage When tank overflow port, collected washing water can be entered in the cleaning solution spray equipment of lower section by clean water overflow line 19, in this way, Excessive washing water can be used as the supplement water of cleaning solution spray equipment, to reduce the cleaning solution supplement of cleaning solution spray equipment Amount.Flue gas duct has can be set in clean water the fluid reservoir 13 such as tank skin and/or tank bottom, for passing through flue gas.This public affairs In opening, the water spray of the cleaning (operating) water nozzle is not particularly limited.In the case where clean water is recycled, clean water spray flow Clean water magnitude of recruitment can be much higher than, practical spray flow depends on the conveying efficiency of pump and nozzle quantity and bore size.
According to the disclosure, can continuously or discontinuously be filled into cleaning water spray system fresh clean water (refer to not with flue gas The clean water contacted), in terms of flue gas flow, preferably fresh clean water magnitude of recruitment is no more than 0.15kg/m with respect to flue gas flow3, More preferably 0.001-0.05kg/m3.Fresh clean water magnitude of recruitment is included in scrubbing tower moisturizing total amount, according to evaporation capacity and outlet Water converts the rate of water make-up of other water supplement ports.Usually when the soluble solid content in clean water fluid reservoir 13 is higher than to be gone out by flue gas Soluble solid content in mouthful flue gas condensing water collected, or be higher than 0.5 weight % when, need from clean water fluid reservoir 13 Middle outlet washing water therein, and reduce internal circulating load or increase fresh clean water magnitude of recruitment.It is preferred that into cleaning water spray system The amount of the fresh clean water of supplement is no more than full tower moisturizing total amount (the sum of evaporation capacity and efflux wastewater amount) in flue gas scrubber.? Under limiting case, full tower moisturizing can be entered by cleaning water spray system, not solve in increased situation substantially in total water consumption Certainly flue gas hangover and subsidence problems.
According to the disclosure, the quantity of the absorbing liquid spray equipment and cleaning water spray system can be respectively level-one or more Grade.It is wherein multistage to refer to along the flow direction of flue gas in the multiple of different location (such as scrubbing tower different height and position) setting Absorbing liquid spray equipment or cleaning water spray system.Cleaning water spray system the first order be in all cleaning water spray systems most Close to flow of flue gas direction upstream, along the direction of flow of flue gas be followed successively by the second level, the third level ... the rest may be inferred, phase With position (such as identical height) setting cleaning (operating) water nozzle 8 be same level-one.Every level-one clean water spray equipment can be set There is its matched clean water fluid reservoir；It multistage can also clean water spray system and share a set of clean water fluid reservoir, at this moment, along cigarette The flow direction of gas, the clean water fluid reservoir 13, which can be located at described in cleaning (operating) water nozzle 8 and afterbody described in the first order, to be inhaled It receives between liquid spray equipment.It can partly or entirely be interconnected, can also mutually completely cut off each between clean water fluid reservoirs at different levels Self-contained is independent clean water fluid reservoir.
The top of disclosed method afterbody preferably in scrubbing tower absorbing liquid spray equipments at different levels increase level-one or Multistage cleaning water spray system, more preferably increases level-one or more above the scrubbing tower afterbody absorbing liquid spray equipment in chimney Grade cleaning water spray system carries out the spray of clean water, or at least level-one cleaning water spray is respectively set in tower body and chimney Device.The quantity of the cleaning (operating) water nozzle can be multiple such as 1~12, preferably 4~8, and can be along tower body or cigarette Chimney cross section symmetry arrangement, such as be equally spaced circumferentially and/or radially, to improve spraying effect.Wherein, herein and The circumferential direction and radial direction hereinafter is to define on the basis of the periphery of scrubbing tower and/or chimney.For example, Fig. 2 is cleaning (operating) water nozzle quantity is the schematic diagram of 4 and a kind of circumferentially arranged embodiment.When the quantity of the cleaning water spray system When for more than one and the quantity more than one of the cleaning (operating) water nozzle of each cleaning water spray system, two neighboring cleaning water spray is filled The cleaning (operating) water nozzle set can be in circumferential direction and/or radially position is arranged across, to further increase spraying effect, for example, Multiple cleaning (operating) water nozzles of each cleaning water unit can be arranged radially evenly, that is, be formed as a row, two neighboring cleaning Two rows of cleaning (operating) water nozzles of water spray unit can be arranged in 90 ° or other angles.
According to the disclosure, this method can also include: that the flue gas after contacting described in order with absorbing liquid first passes through gas-liquid contact Reinforcing elements 14, then contacted with the clean water.Gas-liquid contact reinforcing elements 14 are to be capable of increasing contact of the flue gas with clean water Face makes its mutually intensively mixed component, such as can be filler and/or column plate.The type of the filler may include but not It is limited to the various customary fillers such as Pall ring filler, ladder ring packing, structured packing, height and voidage are excellent without particular/special requirement Select the wire feeding that pressure drop is low.The material of the filler includes but is not limited to the various common corrosion-resistant materials such as polytetrafluoro, stainless steel Matter.Flue gas after contacting described in enabling with absorbing liquid can strengthen gas-liquid contact by gas-liquid contact reinforcing elements 14, drop low water usage Amount.
According to the disclosure, the conditions such as process, parameter of the structure and absorbing liquid of the absorbing liquid spray equipment spray can be with To be conventional in existing wet flue gas washing system, the disclosure does not have special limitation, and those skilled in the art should understand that , how the specific structure of absorbing liquid spray equipment to have no effect on the realization of the disclosure.
Disclosure second aspect: providing a kind of catalyst cracking method, this method comprises: hydrocarbon ils to be contacted to progress with catalyst Catalytic cracking reaction regenerates the catalyst after reaction, and the flue gas for then generating the regeneration is according to the disclosure first Method described in aspect is washed.Wherein, the catalyst contains the sulfur transfer additive of 0.1-10 weight %, preferably comprises 1-5 The sulfur transfer additive of weight %, the sulfur transfer additive under the regeneration condition for reducing the SOx concentration in flue gas.
According to the disclosure, the sulfur transfer additive can be sulfur transfer additive in the prior art, such as patent CN1102433C, It is disclosed in CN1142254C, CN1142015C, CN1148256C, CN100478424C, CN100425339C or CN1323132C Sulfur transfer additive.The sulfur transfer additive at least can be by SO in washing tower inlet flue gas250% or more is reduced, may further will be washed Wash SO in tower inlet flue gas270% or more is reduced, SO3Concentration reduces by 90% or more.It can be removed in flue gas in advance using sulfur transfer additive SOx, reduce operational load and the absorbing liquid consumption of flue gas scrubber, such as sulfur transfer additive can be by the SO in flue gas2Removing 50%, then the absorbing liquid consumption of scrubbing tower will also decrease 50% or so, correspondingly, what system circulation liquid and flowing line 18 were collected The salt content of efflux wastewater also reduces, so that so that flue gas is taken salt content in the steam of chimney out of reduces.In addition, sulfur transfer additive can be with Efficiently trap the reluctant SO of wet scrubbing system3, reduce SO3The blue smoke that aerosol generates.In the feelings using sulfur transfer additive Under condition, the operating flexibility of scrubbing tower is also greatly improved, such as afterbody absorbing liquid spray directly can be converted to cleaning Water spray supplies clean water rather than absorbing liquid to former afterbody absorbing liquid spray equipment, thus not needing to washing Tower carry out it is any it is engineered in the case where, implement the technical solution of the disclosure.
In the catalyst cracking method that the disclosure provides, the nothings such as technology type, process scale, catalyst of the catalytic cracking It is specifically limited.Regenerated mode of operation can be regeneration or incomplete regen-eration completely.The flue gas of regenerator outlet generally needs to carry out Waste heat recycling, such as exchanged heat by waste heat boiler and/or heat-exchanger rig, it is then re-introduced into the flue gas scrubber and is washed Processing is washed, i.e. the catalyst cracking method of the disclosure can also include: that the flue gas is first carried out waste heat recycling, then carry out institute again The step of stating washing.
Disclosed method described in specific embodiment is simply introduced below in conjunction with attached drawing 1-2 and for implementing The flue gas scrubber of disclosed method to further illustrate the disclosure, but does not constitute the limitation to the disclosure.
By taking flue gas scrubber as shown in Figure 1 as an example.Flue gas enters flue gas scrubber tower body 3 simultaneously upwards by smoke inlet 2 Flowing, the absorbing liquid sprayed with the absorption nozzle for liquid 10 of first order absorbing liquid spray equipment contact, and the absorbing liquid after contact enters The absorption liquid storage tank of wash tower bottoms, flue gas continue to rise, and pass through the suction of setting mating below the absorbing liquid spray equipment of the second level The ventilation hole in liquid storage tank is received, the absorbing liquid sprayed with the absorption nozzle for liquid 10 of second level absorbing liquid spray equipment contacts, and contacts Absorbing liquid absorbed liquid storage tank afterwards is collected, and then flue gas enters chimney 5, (right by clean water liquid storage tank and/or tank skin It is taper tank skin for taper fluid reservoir) smoke ventilator that opens up passes through the clean water fluid reservoir 13 being arranged in chimney, leads to It is contacted after crossing gas-liquid contact reinforcing elements 14 with the clean water of cleaning (operating) water nozzle 8 spray of cleaning water spray system, then by cigarette 6 discharge of gas outlet.Cleaning 8 quantity of (operating) water nozzle is 4, is circumferentially 90 ° of arrangements by angle, as shown in Figure 2.Clean water fluid reservoir 13 collect washing waters by 7 water circulation conveying of clean water transfer pump to cleaning (operating) water nozzle 8 sprayed, can also by pipeline into Enter to absorb in liquid storage tank.It is made up line by absorbent solution and water and 1,4 conveys absorbing liquid to absorbing in liquid storage tank, and it is described Absorbing liquid can be recycled under the action of absorbing liquid circulating pump 9,11.Efflux wastewater, flue gas are collected by efflux wastewater pipeline 12 Collect flue gas condensing water in outlet 6.
The disclosure is further described by the following examples, but does not therefore limit the disclosure.
Embodiment 1
Preparing by patent CN1323132C embodiment 5 for 1.5 weight % is added in catalytic cracking unit antigravity system Sulfur transfer additive, regenerated flue gas after residual heat boiler for exchanging heat enter scrubbing tower smoke inlet.Inlet flue gas major pollutants composition Mean value are as follows: SO2: 95mg/m3, SO3: 10mg/m3, NOx:85mg/m3, solid dust: 115mg/m3.Flue gas flow 5100Nm3/ Min, 170 DEG C of inlet temperature.
Structure of column scrubber is as shown in Fig. 1, and level-one is arranged in chimney 5 and cleans water spray system.(operating) water nozzle 8 is cleaned to use Polytetrafluoro material spiral nozzle, quantity are 4, are circumferentially 90 ° of arrangements by angle, as shown in Figure 2.Clean (operating) water nozzle 8 and clear The honeycomb structured packing that bed height is 0.3m is loaded between clean water fluid reservoir 13.It is provided to cleaning water spray system fresh Cleaning coolant-temperature gage is 20 DEG C, 0.002 weight % of soluble solid content, and magnitude of recruitment is 1t/h (0.0033kg/Nm3Flue gas), clearly Clean (operating) water nozzle pump discharge pressure 0.4MPa sprays total amount 0.02kg water/Nm3Flue gas, clean water are directly sent by clean water transfer pump 7 Enter to clean water spray system (cleaning (operating) water nozzle), what clean water fluid reservoir 13 was collected is also sent to the clean water after smoke contacts Clean water transfer pump 7 is recycled.Full tower moisturizing total amount (the sum of evaporation capacity and efflux wastewater amount) 20t/h.Using 30 weight % NaOH aqueous solution (absorbent solution) supplement absorbent, the magnitude of recruitment mean value 105L/h of the solution.Absorption liquid pH 6.8-7.2. Absorbent solution and water (fresh clean water) enter scrubbing tower by making up line respectively, and the two converges to together injection tower bottom suction afterwards It receives in liquid fluid reservoir, is delivered to absorption nozzle for liquid through absorbing liquid circulating pump after being sufficiently mixed wherein, is sprayed.Efflux wastewater 1.1 weight % of soluble solid content, the 0.02 weight % of flue gas condensing water-soluble solid content collected by exhanst gas outlet 6.
Chimney breast groups of contaminants becomes: SO2: 15mg/m3, SO3(sulfur-bearing acid mist and/or aerosol): 10mg/m3(including All containing sulfate radicals substances), NOx:70mg/m3, solid dust: 19mg/m3.For chimney breast flue gas close to upright discharge, hangover is existing As eliminating, no blue plume sedimentation is diffused in plant area's phenomenon.
Embodiment 2
Preparing by patent CN1323132C embodiment 5 for 1.8 weight % is added in catalytic cracking unit antigravity system Sulfur transfer additive, regenerated flue gas after residual heat boiler for exchanging heat enter scrubbing tower smoke inlet.Inlet flue gas major pollutants composition Mean value are as follows: SO2: 65mg/m3, SO3: 10mg/m3, NOx:82mg/m3, solid dust: 124mg/m3.Flue gas flow 5100Nm3/ Min, 170 DEG C of inlet temperature.
Structure of column scrubber and embodiment 1 are distinguished as the setting cleaning water spray system not in chimney, but by scrubbing tower tower The absorbing liquid inlet valve of internal second level absorbing liquid spray equipment is closed, and cleaning water spray is converted directly into, i.e., clear to its supply Clean water rather than absorbing liquid.The fresh cleaning coolant-temperature gage provided to cleaning water spray system is 20 DEG C, soluble solid content 0.002 weight %, magnitude of recruitment are 2t/h (0.0065kg/Nm3Flue gas), clean water nozzle pump discharge pressure 0.4MPa, spray is always Measure 0.03kg water/Nm3Flue gas, clean water are directly sent into cleaning water spray system (cleaning (operating) water nozzle) by clean water transfer pump 7, clearly What clean water fluid reservoir 13 was collected is also sent to the recycling of clean water transfer pump 7 with the clean water after smoke contacts.Full tower moisturizing Total amount (the sum of evaporation capacity and efflux wastewater amount) 20t/h is supplemented using the NaOH aqueous solution (absorbent solution) of 30 weight % and is inhaled Receive agent, the magnitude of recruitment mean value 70L/h of the solution.Absorption liquid pH 6.8-7.2.Absorbent solution and water (fresh clean water) respectively by It makes up line and enters scrubbing tower, the two converges to be injected in tower bottom absorbing liquid fluid reservoir afterwards together, is passed through after being sufficiently mixed wherein Absorbing liquid circulating pump is delivered to absorption nozzle for liquid, is sprayed.Efflux wastewater soluble solid content 0.9%, by exhanst gas outlet 6 The flue gas condensing water-soluble solid content 0.012% of collection.
Chimney breast groups of contaminants becomes: SO2: 17mg/m3, SO3(sulfur-bearing acid mist and/or aerosol): 6mg/m3(including All containing sulfate radicals substances), NOx:72mg/m3, solid dust: 14mg/m3.For chimney breast flue gas close to upright discharge, hangover is existing As eliminating, no blue plume sedimentation is diffused in plant area's phenomenon.
Embodiment 3
Sulfur transfer additive is free of in catalytic cracking unit antigravity system, regenerated flue gas enters washing after residual heat boiler for exchanging heat Tower entrance.It is SO that inlet flue gas major pollutants, which form mean value,2: 850mg/m3, SO3: 590mg/m3, NOx:90mg/m3, solid Dust: 120mg/m3.Flue gas flow 5100Nm3/ min, 170 DEG C of inlet temperature.
Structure of column scrubber is same as Example 1.The fresh cleaning coolant-temperature gage provided to cleaning water spray system is 20 DEG C, molten Solution property 0.002 weight % of solid content, magnitude of recruitment are 5t/h (0.016kg/Nm3Flue gas), clean water nozzle pump discharge pressure 0.4MPa sprays total amount 0.12kg water/Nm3Flue gas, clean water are directly sent into cleaning water spray system by clean water transfer pump 7 (cleaning (operating) water nozzle), what clean water fluid reservoir 13 was collected, which be also sent to clean water transfer pump 7 with the clean water after smoke contacts, follows Ring uses.Full tower moisturizing total amount (the sum of evaporation capacity and efflux wastewater amount) 23t/h.It (is inhaled using the NaOH aqueous solution of 30 weight % Receive agent solution) supplement absorbent, the magnitude of recruitment mean value 680L/h of the solution.Absorption liquid pH 6.7-7.0.Absorbent and absorbing liquid Enter scrubbing tower by making up line respectively with water (fresh clean water), the two converges to injects tower bottom absorbing liquid fluid reservoir afterwards together In, it is delivered to absorption nozzle for liquid through absorbing liquid circulating pump after being sufficiently mixed wherein, is sprayed.Efflux wastewater soluble solid 4.3 weight % of content, the 0.025 weight % of flue gas condensing water-soluble solid content collected by exhanst gas outlet 6.
Chimney breast groups of contaminants becomes: SO2: 16mg/m3, SO3(sulfur-bearing acid mist and/or aerosol): 20mg/m3(including All containing sulfate radicals substances), NOx:70mg/m3, solid dust: 10mg/m3.Chimney breast flue gas is grown close to upright discharge, hangover Degree shortens, and no blue plume sedimentation is diffused in plant area's phenomenon.
Comparative example 1
Sulfur transfer additive is free of in catalytic cracking unit antigravity system, regenerated flue gas enters washing after residual heat boiler for exchanging heat Tower entrance.It is SO that inlet flue gas major pollutants, which form mean value,2: 850mg/m3, SO3: 590mg/m3, NOx:90mg/m3, solid Dust: 120mg/m3.Flue gas flow 5100Nm3/ min, 170 DEG C of inlet temperature.
Structure of column scrubber and embodiment 1 are distinguished as being not provided with cleaning water spray system.Full tower moisturizing total amount 22t/h, uses The NaOH aqueous solution (absorbent solution) of 30 weight % supplements absorbent, the magnitude of recruitment mean value 620L/h of the solution.Absorption liquid pH 6.8-7.2, efflux wastewater soluble solid content 3.5%, the flue gas condensing water-soluble solid content collected by exhanst gas outlet 6 0.26%.
Chimney breast groups of contaminants becomes: SO2: 20mg/m3, SO3(sulfur-bearing acid mist and/or aerosol): 420mg/m3, NOx:78mg/m3, solid dust: 15mg/m3.Flue gas trailing phenomenon is serious, laterally stretches hundred meters or so, and blue plume settles, more It overflows in plant area periphery.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally Disclosed thought equally should be considered as disclosure disclosure of that.

Claims (14)

1.一种烟气洗涤方法，其特征在于，该方法包括：将烟气引入烟气洗涤塔与含吸收剂的吸收液接触，并将与所述吸收液接触后的烟气在出塔前与清洁水接触。1. a flue gas scrubbing method is characterized in that, the method comprises: introducing flue gas into a flue gas scrubbing tower and contacting with an absorbing liquid containing an absorbent, and with the flue gas after contacting with the absorbing liquid before going out of the tower in contact with clean water. 2.根据权利要求1所述的方法，其中，所述清洁水与烟气的比例为：0.001-0.5kg水/Nm3烟气。2. The method according to claim 1, wherein the ratio of the clean water to the flue gas is: 0.001-0.5kg water/Nm 3 flue gas. 3.根据权利要求1所述的方法，其中，所述清洁水为选自新鲜水、中水和经过脱盐处理的废水中的至少一种；3. The method according to claim 1, wherein the clean water is at least one selected from the group consisting of fresh water, reclaimed water and desalinated wastewater; 优选地，所述清洁水的溶解性固体含量不高于由所述洗涤塔的烟气出口收集的烟气冷凝水的溶解性固体含量，优选地，所述清洁水的溶解性固体含量不高于0.01重量％。Preferably, the dissolved solids content of the clean water is not higher than the dissolved solids content of the flue gas condensed water collected from the flue gas outlet of the scrubber, preferably, the dissolved solids content of the clean water is not high at 0.01% by weight. 4.根据权利要求1所述的方法，其中，所述烟气为选自FCC再生烟气、热电厂尾气、锅炉产生的废气、燃烧炉产生的废气和煅烧炉产生的废气中的至少一种；4. The method according to claim 1, wherein the flue gas is at least one selected from the group consisting of FCC regeneration flue gas, exhaust gas from thermal power plants, waste gas produced by boilers, waste gas produced by combustion furnaces and waste gas produced by calciners; 所述烟气的温度为50-500℃，优选为100-300℃。The temperature of the flue gas is 50-500°C, preferably 100-300°C. 5.根据权利要求1所述的方法，其中，所述烟气含有污染物，所述的污染物包括SOx、NOx、NH3、CO、CO2、Cl2、HCl和固体粉尘中的至少一种；5. The method of claim 1, wherein the flue gas contains pollutants comprising at least one of SOx, NOx, NH3 , CO , CO2 , Cl2, HCl and solid dust kind; 优选地，所述烟气含有：浓度为20-10000mg/m3的SOx，浓度为20-2000mg/m3的NOx，以及浓度为10-1000mg/m3的固体粉尘；其中，所述浓度为标准状态下的浓度。Preferably, the flue gas contains: SOx with a concentration of 20-10000mg/ m3 , NOx with a concentration of 20-2000mg/ m3 , and solid dust with a concentration of 10-1000mg/ m3 ; wherein the concentration is concentration in the standard state. 6.根据权利要求1所述的方法，其中，所述洗涤塔内沿烟气流动方向依次设置有吸收液喷淋装置和清洁水喷淋装置，所述清洁水喷淋装置包括用于喷淋清洁水的清洁水喷嘴(8)，以使得所述吸收液接触后的烟气在出塔前与清洁水接触；6. The method according to claim 1, wherein an absorption liquid spray device and a clean water spray device are sequentially arranged in the washing tower along the flow direction of the flue gas, and the clean water spray device includes a spray device for spraying A clean water nozzle (8) for clean water, so that the flue gas after the contact of the absorbing liquid contacts the clean water before exiting the tower; 所述清洁水的泵出口压力为0.1-10MPa，优选为0.1-1.0MPa。The pump outlet pressure of the clean water is 0.1-10 MPa, preferably 0.1-1.0 MPa. 7.根据权利要求1或6所述的方法，其中，所述烟气洗涤塔包括洗涤塔塔体(3)和与所述洗涤塔塔体(3)流体连通的烟囱(5)，所述清洁水喷嘴(8)位于所述烟囱(5)内。7. The method according to claim 1 or 6, wherein the flue gas scrubber comprises a scrubber tower body (3) and a chimney (5) in fluid communication with the scrubber tower body (3), the A cleaning water nozzle (8) is located in the chimney (5). 8.根据权利要求6所述的方法，其中，所述清洁水喷淋装置和吸收液喷淋装置之间还设置有清洁水储液罐(13)，用于收集与烟气接触后的清洁水；8. The method according to claim 6, wherein a clean water storage tank (13) is further provided between the clean water spray device and the absorption liquid spray device, for collecting clean water after contact with the flue gas water; 所收集的洗涤水可被送至所述清洁水喷淋装置以循环用于与所述烟气接触，和/或，所述洗涤水可以作为吸收液的补充水被送至所述吸收液喷淋装置。The collected wash water may be sent to the clean water spray device to be circulated for contact with the flue gas, and/or the wash water may be sent to the absorption liquid spray as supplementary water for the absorption liquid shower device. 9.根据权利要求8所述的方法，其中，所述吸收液喷淋装置和清洁水喷淋装置的数量各自为一级或多级，沿烟气的流动方向，所述清洁水储液罐(13)位于第一级所述清洁水喷嘴(8)和最后一级所述吸收液喷淋装置之间。9 . The method according to claim 8 , wherein the number of the absorbing liquid spraying device and the cleaning water spraying device is one or more stages, and along the flow direction of the flue gas, the clean water liquid storage tank (13) is located between the cleaning water nozzle (8) of the first stage and the absorbing liquid spraying device of the last stage. 10.根据权利要求6所述的方法，其中，所述清洁水喷嘴(8)的数量为1～12个；当所述清洁水喷嘴(8)的数量多于1个时，所述清洁水喷嘴(8)沿周向和/或径向等间隔地设置；10. The method according to claim 6, wherein the number of the cleaning water nozzles (8) is 1-12; when the number of the cleaning water nozzles (8) is more than 1, the cleaning water The nozzles (8) are arranged at equal intervals in the circumferential and/or radial directions; 所述清洁水喷嘴(8)为选自螺旋喷嘴、扇形喷嘴和环形喷嘴中的至少一种。The cleaning water nozzle (8) is at least one selected from a spiral nozzle, a fan-shaped nozzle and an annular nozzle. 11.根据权利要求1所述的方法，其中，该方法还包括：令所述与吸收液接触后的烟气先经过气液接触强化组件(14)，再与所述清洁水接触，所述气液接触强化组件(14)为填料和/或塔板。11. The method according to claim 1, wherein the method further comprises: making the flue gas contacted with the absorbing liquid pass through the gas-liquid contact strengthening component (14) first, and then contact with the clean water, the The gas-liquid contact strengthening assembly (14) is packing and/or tray. 12.根据权利要求1所述的方法，其中，所述吸收液的pH值为5-10，优选为6-8；12. The method according to claim 1, wherein the pH value of the absorption solution is 5-10, preferably 6-8; 所述吸收剂为碱金属的可溶性氢氧化物和碱金属的可溶性盐中的至少一种；优选地，所述吸收剂为选自碳酸钠、碳酸氢钠、氢氧化钠、碳酸钾、碳酸氢钾和氢氧化钾中的至少一种。The absorbent is at least one of alkali metal soluble hydroxides and alkali metal soluble salts; preferably, the absorbent is selected from sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, hydrogen carbonate At least one of potassium and potassium hydroxide. 13.一种催化裂化方法，其特征在于，该方法包括：将烃油与催化剂接触进行催化裂化反应，对反应后的催化剂进行再生，然后将所述再生产生的烟气按照权利要求1-12中任意一项所述的方法进行洗涤；13. A catalytic cracking method, characterized in that the method comprises: contacting hydrocarbon oil with a catalyst to carry out a catalytic cracking reaction, regenerating the reacted catalyst, and then regenerating the generated flue gas according to claims 1-12 The method described in any one is washed; 所述催化剂含有0.1-10重量％的硫转移剂，优选含有1-5重量％的硫转移剂，所述硫转移剂用于在所述再生条件下降低烟气中的SOx浓度。The catalyst contains 0.1-10% by weight of sulfur transfer agent, preferably 1-5% by weight of sulfur transfer agent, which is used to reduce the SOx concentration in the flue gas under the regeneration conditions. 14.根据权利要求13所述的方法，其中，该方法还包括：先将所述烟气进行余热回收，然后再进行所述洗涤的步骤。14. The method according to claim 13, wherein the method further comprises the step of first performing waste heat recovery on the flue gas, and then performing the washing.
CN201810491397.7A 2017-11-07 2018-05-21 Flue gas washing method and catalytic cracking method Pending CN109745803A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5296973A (en) * 1976-02-12 1977-08-15 Babcock Hitachi Kk Mist removing apparatus
JPH0722675B2 (en) * 1986-03-26 1995-03-15 バブコツク日立株式会社 Wet flue gas desulfurization equipment
CN201871320U (en) * 2010-11-12 2011-06-22 中国石油化工股份有限公司 Catalytic cracking regeneration flue gas desulfurization and dust removal equipment
CN103059923A (en) * 2011-10-18 2013-04-24 中国石油化工股份有限公司 Lightweight hydrocarbon oil catalytic conversion method with heat exchange
CN104258668A (en) * 2014-10-13 2015-01-07 北京国电龙源环保工程有限公司 Deep washing dust removal device
CN104874255A (en) * 2015-06-08 2015-09-02 北京香源溪环保科技有限公司 Demisting system with dedusting, demisting and water recovery functions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5296973A (en) * 1976-02-12 1977-08-15 Babcock Hitachi Kk Mist removing apparatus
JPH0722675B2 (en) * 1986-03-26 1995-03-15 バブコツク日立株式会社 Wet flue gas desulfurization equipment
CN201871320U (en) * 2010-11-12 2011-06-22 中国石油化工股份有限公司 Catalytic cracking regeneration flue gas desulfurization and dust removal equipment
CN103059923A (en) * 2011-10-18 2013-04-24 中国石油化工股份有限公司 Lightweight hydrocarbon oil catalytic conversion method with heat exchange
CN104258668A (en) * 2014-10-13 2015-01-07 北京国电龙源环保工程有限公司 Deep washing dust removal device
CN104874255A (en) * 2015-06-08 2015-09-02 北京香源溪环保科技有限公司 Demisting system with dedusting, demisting and water recovery functions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
丰华: "《石油加工助剂及石油产品添加剂加工配制与生产应用最新工艺技术操作手册》", 30 June 2006, 中国科技文化出版社 *

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