CN106890634A - A kind of SCR denitration of boat diesel engine vent gas treatment - Google Patents
A kind of SCR denitration of boat diesel engine vent gas treatment Download PDFInfo
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- CN106890634A CN106890634A CN201710080059.XA CN201710080059A CN106890634A CN 106890634 A CN106890634 A CN 106890634A CN 201710080059 A CN201710080059 A CN 201710080059A CN 106890634 A CN106890634 A CN 106890634A
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- Prior art keywords
- diesel engine
- scr denitration
- gas treatment
- boat diesel
- vent gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses a kind of SCR denitration of boat diesel engine vent gas treatment.The present invention prepares catalyst carrier using terra silicea purificata and butyl titanate colloidal sol, using glass fibre and mechanical strength aramid fiber higher as shaping strength material, SCR denitration is had mechanical strength higher.Additionally, the present invention will be molded calcining heat in common process be down to 500 ~ 550 DEG C by 600 ~ 620 DEG C, reducing energy consumption can improve the denitration activity of catalyst again, catalyst performance is more applicable the environment of boat diesel engine denitrating flue gas.
Description
Technical field
The invention belongs to boat diesel engine SCR denitration preparing technical field, and in particular to a kind of boat diesel engine
A kind of SCR denitration of vent gas treatment, it is therefore intended that high intensity for adapting to marine diesel tail gas denitration of invention, efficiently
The SCR denitration of rate.
Background technology
With the gradually reinforcement gone from bad to worse with people's environmental consciousness of global environment, the atmosphere pollution that ship is caused has been drawn
Play the extensive concern of international community.International Maritime Organization（IMO）Pass through MARPOL73/78 pacts supplemental provisions VI in 1997 ---
Prevent ship from causing atmosphere pollution rule, the rule is formally effective on May 19th, 2005.In October, 2008, in MEPC58
The amendment of supplemental provisions VI is passed in secondary meeting through discussion again, discharge of the amendment to ship pernicious gas proposes stricter
Requirement, and specify that the three phases of emission limits of nitrogen oxides, i.e. Tier I, Tier II and Tier III.
Nitrogen oxides（NOx）It is the main cause to form acid rain, haze, photochemical fog and greenhouse effects.The wherein water surface
Run unit（Refer to any kind of fixation or mobile platform and ship run under marine environment, including hydrofoil, air cushion
Ship, submersible, floating ship etc.）The NOx emission of discharge accounts for the 14%~15% of world's NOx total releases.SCR（SCR）
Technology is used as the currently the only denitration technology for meeting boat diesel engine Abgasgesetz Tire- III, wherein SCR
（SCR）The core of technology is efficient stable, adapts to the SCR denitration of boat diesel engine flue gas.However, ship SCR
The problem that system application is present is more and complicated, wherein because ship is rocked greatly, diesel vibration is strong, while denitration temperature exists
Low-temperature zone（200~300℃）, the compression strength and cryogenic property of conventional catalyst are difficult in adapt to this operating condition, cause catalysis
Agent service life is substantially reduced.
Diatomite diatom shell structure unique in itself, with strong adsorptivity, bigger serface, high porosity, high temperature resistant
It is good catalyst carrier material Deng advantageous property, but due to diatomite, its mechanical strength is not high, if can be by certain technology
Means improve its intensity, you can be widely used in industry.
In existing process, the shaping calcining heat of SCR catalyst will be to 600 DEG C ~ 620 DEG C mechanical strengths of its catalyst
Meet the requirements, and calcining heat is at 500 DEG C or so, the chemical bond between V, W and Ti has been formed, and continues to rise a high-temperature meeting
Cause TiO2Rutile-type is slowly turned to by Detitanium-ore-type, causes specific surface area to decline, influence catalyst denitration activity.
For boat diesel engine denitration, Neither of the two can be dispensed for catalyst high efficiency, high intensity.Therefore, to meet mesh
Preceding market of ship denitration requirement, it would be highly desirable to develop a kind of high intensity for being adapted to boat diesel engine, high efficiency SCR denitration.
The content of the invention
The present invention gives a kind of SCR denitration of boat diesel engine vent gas treatment, it is therefore intended that in conventional catalyst
High intensity, the efficient SCR denitration under a kind of environment suitable for boat diesel engine are invented on the basis of agent.
To achieve these goals, embodiment of the present invention is：
The SCR denitration embodiment of described marine diesel tail gas denitration is：
Step one：One or more in cellulose, cellulose derivative, polyacrylamide, polyvinyl alcohol is configured with
The acidic aqueous solution of certain viscosity, and in mass ratio（1.2~2）：1 by granularity for 1000 ~ 2000 mesh diatomite and with certain
The acidic aqueous solution of viscosity is thoroughly mixed uniformly under ultrasonication, and 2 ~ 4h is stood under closed environment, obtains refined diatom
Soil；
Step 2：In mass ratio（10~15）：1 by butyl titanate colloidal sol（With TiO2Meter）The terra silicea purificata obtained with step one
It is well mixed rapidly under ultrasound condition, is dried at 105 DEG C after standing 2 ~ 6h；
Step 3：The mixture that step 2 is obtained is calcined 4 ~ 6h at 600 ~ 700 DEG C, obtains SCR catalyst carrier；
Step 4：With Detitanium-ore-type TiO2It is common carrier with terra silicea purificata, and is passed through with active component, auxiliary agent and moulding material
Product is obtained after the operations such as batch mixing, extrusion, drying, calcining, sawing, packaging.
Wherein, described carrier is with by Detitanium-ore-type TiO2With terra silicea purificata be composition common carrier, account for 80wt ~
90wt%。
Further, a kind of preparation method of the SCR denitration of described boat diesel engine vent gas treatment, its feature
It is that toughener (strength materials) is the mixture of glass fibre and aramid fiber in described moulding material, accounts for 2wt ~ 8wt%；
Preferably, the mass ratio of glass fibre and aramid fiber is（3~5）:1.
Further, a kind of SCR denitration preparation method of described boat diesel engine vent gas treatment, its feature
It is that described cellulose derivative includes carboxymethylcellulose calcium, hydroxypropyl cellulose, methylcellulose；
Preferably, described concentration of polymer solution is that 0.1% ~ 1%, PH is 3 ~ 5.
Further, a kind of SCR denitration preparation method of described boat diesel engine vent gas treatment, its feature
It is that SCR catalyst shaping calcining heat is 500 ~ 550 DEG C.
The beneficial effects of the invention are as follows：
The present invention relates to a kind of SCR denitration of boat diesel engine vent gas treatment, the present invention is as a result of above-mentioned implementation
Scheme, has the advantages that compared with existing SCR denitration：
The present invention prepares anatase TiO using terra silicea purificata and butyl titanate colloidal sol2With diatomite catalyst carrier, its carrier
Mechanical strength is greatly improved, and another moulding material employs the mixture of glass fibre and mechanical strength aramid fiber higher as catalysis
The toughener of agent, thus obtained SCR denitration moulding material and carrier complementation have obtained the SCR catalyst of high intensity.
Additionally, can also reduce shaping of catalyst calcining heat on the premise of compression strength is ensured, forge shaping of catalyst
Burn temperature and be reduced to 500 ~ 550 DEG C by original 600 ~ 620 DEG C, SCR catalyst can be also improved while reducing energy consumption
Denitration activity, makes catalyst performance more be applicable the environment of boat diesel engine denitrating flue gas, solves marine diesel tail gas and takes off
The problem of nitre.
Specific embodiment
The radial direction of catalyst is required in national standard according to honeycomb type flue gas denitration catalyst in GB/T31587-2015
Compression strength is not less than 0.4MPa, and axial compression strength is not less than 2.0MPa.
Embodiment 1：
The SCR denitration embodiment of described marine diesel tail gas denitration is：
Step one：Polyacrylamide is configured to the acidic aqueous solution of mass concentration 0.5%, PH=3, and in mass ratio 1.2：1 will
Granularity is that the diatomite and polyacrylamide acidic aqueous solution of 1000 mesh are thoroughly mixed uniformly under ultrasonication, closed loop
4h is stood under border, terra silicea purificata is obtained；
Step 2：In mass ratio 15：1 by butyl titanate colloidal sol（With TiO2Meter）The terra silicea purificata obtained with step one is in ultrasound
Under the conditions of be well mixed rapidly, stand 6h after at 105 DEG C dry；
Step 3：The mixture that step 2 is obtained is calcined 4h at 650 DEG C, obtains SCR catalyst carrier；
Step 4：With Detitanium-ore-type TiO2The common carrier constituted with terra silicea purificata accounts for the 85% of mass fraction, and and activearm
Point, auxiliary agent and moulding material obtain product after the operation such as batch mixing, extrusion, drying, 500 DEG C of calcinings, sawing, packagings.
Toughener is the mixture of glass fibre and aramid fiber wherein in shaping of catalyst material, and quality compares glass fibre：Virtue
Synthetic fibre=5:1, account for the 4wt% of mass fraction.
The hole SCR denitrating catalysts of boat diesel engine 40 of gained are placed in SCR diesel engine bench experimental rigs, in bavin
Denitration efficiency and compression strength are tested under oil machine flue gas, as a result such as following table：
Embodiment 2：
The SCR denitration embodiment of described marine diesel tail gas denitration is：
Step one：Polyacrylamide is configured to the acidic aqueous solution of mass concentration 0.3%, PH=4, and in mass ratio 1.5：1 will
Granularity is that the diatomite and polyacrylamide acidic aqueous solution of 1500 mesh are thoroughly mixed uniformly under ultrasonication, closed loop
4h is stood under border, terra silicea purificata is obtained；
Step 2：In mass ratio 10：1 by butyl titanate colloidal sol（With TiO2Meter）The terra silicea purificata obtained with step one is in ultrasound
Under the conditions of be well mixed rapidly, stand 6h after at 105 DEG C dry；
Step 3：The mixture that step 2 is obtained is calcined 4h at 650 DEG C, obtains SCR catalyst carrier；
Step 4：With Detitanium-ore-type TiO2The common carrier constituted with terra silicea purificata accounts for the 80% of mass fraction, and and activearm
Point, auxiliary agent and moulding material obtain product after the operation such as batch mixing, extrusion, drying, 550 DEG C of calcinings, sawing, packagings.
Toughener is the mixture of glass fibre and aramid fiber wherein in shaping of catalyst material, and quality compares glass fibre：Virtue
Synthetic fibre=3:1, account for the 4wt% of mass fraction.
The hole SCR denitrating catalysts of boat diesel engine 40 of gained are placed in SCR diesel engine bench experimental rigs, in bavin
Denitration efficiency and compression strength are tested under oil machine flue gas, as a result such as following table：
Embodiment 3：
The SCR denitration embodiment of described marine diesel tail gas denitration is：
Step one：Cellulose is configured to the acidic aqueous solution of mass concentration 0.5%, PH=3, and in mass ratio 1.5：1 by granularity
For the diatomite and polyacrylamide acidic aqueous solution of 2000 mesh are thoroughly mixed uniformly, under closed environment under ultrasonication
4h is stood, terra silicea purificata is obtained；
Step 2：In mass ratio 12：1 by butyl titanate colloidal sol（With TiO2Meter）The terra silicea purificata obtained with step one is in ultrasound
Under the conditions of be well mixed rapidly, stand 6h after at 105 DEG C dry；
Step 3：The mixture that step 2 is obtained is calcined 4h at 620 DEG C, obtains SCR catalyst carrier；
Step 4：With Detitanium-ore-type TiO2The common carrier constituted with terra silicea purificata accounts for the 85% of mass fraction, and and activearm
Point, auxiliary agent and moulding material obtain product after the operation such as batch mixing, extrusion, drying, 550 DEG C of calcinings, sawing, packagings.
Toughener is the mixture of glass fibre and aramid fiber wherein in shaping of catalyst material, and quality compares glass fibre：Virtue
Synthetic fibre=5:1, account for the 4wt% of mass fraction.
The hole SCR denitrating catalysts of boat diesel engine 40 of gained are placed in SCR diesel engine bench experimental rigs, in bavin
Denitration efficiency and compression strength are tested under oil machine flue gas, as a result such as following table：
Claims (5)
1. a kind of SCR denitration of boat diesel engine vent gas treatment, it is characterised in that its preparation method is：
Step one：One or more in cellulose, cellulose derivative, polyacrylamide, polyvinyl alcohol is configured with
The acidic aqueous solution of certain viscosity, and in mass ratio（1.2~2）：1 by granularity for 1000 ~ 2000 mesh diatomite and with certain
The acidic aqueous solution of viscosity is thoroughly mixed uniformly under ultrasonication, and 2 ~ 4h is stood under closed environment, obtains refined diatom
Soil；
Step 2：In mass ratio（10~15）：1 by butyl titanate colloidal sol（With TiO2Meter）The terra silicea purificata obtained with step one exists
It is well mixed rapidly under ultrasound condition, is dried at 105 DEG C after standing 2 ~ 6h；
Step 3：The mixture that step 2 is obtained is calcined 4 ~ 6h at 600 ~ 700 DEG C, obtains SCR catalyst carrier；
Step 4：With Detitanium-ore-type TiO2It is common carrier with terra silicea purificata, and is passed through with active component, auxiliary agent and moulding material
Product is obtained after the operations such as batch mixing, extrusion, drying, calcining, sawing, packaging.
2. a kind of preparation method of the SCR denitration of boat diesel engine vent gas treatment as claimed in claim 1, its feature
It is, it is described by Detitanium-ore-type TiO2The common carrier constituted with terra silicea purificata, accounts for 80wt ~ 90wt%.
3. a kind of preparation method of the SCR denitration of boat diesel engine vent gas treatment as claimed in claim 1, its feature
It is that toughener (strength materials) is the mixture of glass fibre and aramid fiber in described moulding material, accounts for 2wt ~ 8wt%；
Wherein, the mass ratio of glass fibre and aramid fiber is（3~5）:1.
4. a kind of SCR denitration preparation method of boat diesel engine vent gas treatment as claimed in claim 1, its feature exists
In described cellulose derivative includes carboxymethylcellulose calcium, hydroxypropyl cellulose, methylcellulose；
Preferably, described concentration of polymer solution is that 0.1% ~ 1%, PH is 3 ~ 5.
5. a kind of SCR denitration preparation method of boat diesel engine vent gas treatment as claimed in claim 1, its feature exists
In SCR catalyst shaping calcining heat is 500 ~ 550 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710080059.XA CN106890634A (en) | 2017-02-15 | 2017-02-15 | A kind of SCR denitration of boat diesel engine vent gas treatment |
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| CN201710080059.XA CN106890634A (en) | 2017-02-15 | 2017-02-15 | A kind of SCR denitration of boat diesel engine vent gas treatment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399453A (en) * | 2014-09-28 | 2015-03-11 | 於承志 | SCR denitration catalyst and preparation method thereof |
| CN105013540A (en) * | 2015-07-10 | 2015-11-04 | 山东海润环保科技有限公司 | Marine denitration catalyst and preparation method therefor |
| CN106111149A (en) * | 2016-06-16 | 2016-11-16 | 浙江三龙催化剂有限公司 | Boats and ships denitrating catalyst and preparation method thereof |
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- 2017-02-15 CN CN201710080059.XA patent/CN106890634A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104399453A (en) * | 2014-09-28 | 2015-03-11 | 於承志 | SCR denitration catalyst and preparation method thereof |
| CN105013540A (en) * | 2015-07-10 | 2015-11-04 | 山东海润环保科技有限公司 | Marine denitration catalyst and preparation method therefor |
| CN106111149A (en) * | 2016-06-16 | 2016-11-16 | 浙江三龙催化剂有限公司 | Boats and ships denitrating catalyst and preparation method thereof |
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Application publication date: 20170627 |