CN101002997A - Atomization jetting nozzle for desulfurization of flue-gas - Google Patents
Atomization jetting nozzle for desulfurization of flue-gas Download PDFInfo
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- CN101002997A CN101002997A CN 200610037791 CN200610037791A CN101002997A CN 101002997 A CN101002997 A CN 101002997A CN 200610037791 CN200610037791 CN 200610037791 CN 200610037791 A CN200610037791 A CN 200610037791A CN 101002997 A CN101002997 A CN 101002997A
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- desulfurization
- flue
- nozzle
- jetting nozzle
- atomization jetting
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Abstract
An atomizing ceramic nozzle for desulfurizing the fume generated by the coal-burning boiler in steam power plant is proportionally prepared from alpha-Al2O3 superfine powder, t-ZrO2 nanoparticles, clay, mineralizing agent, and the aqueous solution of methylcellulose through sintering and plating alpha-Al2O3 ceramic film. It has high resistance to high temp, strong corrosion and sudden temp variation, and high strength.
Description
Technical field
The present invention relates to a kind of atomization jetting nozzle for desulfurization of flue-gas that is used for thermal power plant's coal fired power generation unit, the manufacture method of this atomization jetting nozzle for desulfurization of flue-gas is provided simultaneously.
Background technology
Flue gas desulfurization is to control the SO of thermal power plant at present
2Discharge effective and most widely used technology, and atomizer is the critical component in the wet desulphurization device, that Chinese patent 02112991.6 discloses is a kind of " desulfurization and dedusting with conical spiral nozzle and manufacture method and mould ", shower nozzle adopts ceramic material, by precise forming of slip casting, the ceramic material of selecting can be alumina ceramics, corundum, zirconia, carborundum etc., alundum (Al content is 75-99%, the zirconia of admixture 5-25%, this batching is 95 conventional porcelain, and its weak point is that (1) wearability is relatively poor.Because of its injection forming traditional handicraft that adopts, this technology is with slush pump mud to be transported in the plaster mold by pipeline, and general water content is between 30～35%, so the compactness of moulded pottery not yet put in a kiln to bake is relatively poor, its intensity, wearability are lower.And coal-fired unit desulfurizer inlet flue gas＞131 ℃, outlet flue gas＞80 ℃, the operation principle of atomizing desulfurization nozzle is to utilize high-pressure pump to make alkaline slurry obtain higher pressure, nozzle entrance pressure 2 * 10
5Pa, flow 170m
3/ h, tangential inlet enters the rotating room of nozzle, slurries obtain in the rotating room to rotatablely move, according to spinning momentum square conservation principle, rotary speed and radius of turn are inversely proportional to, the closer to the slurries in axle center, its rotary speed is big more, wearability, intensity, toughness reguirements to nozzle are also big more, owing to desulfurizer involves great expense, so the standard code critical piece that average cost is 1000～1200 yuans of/kilowatt national environmental protection industry HJ/T179-2005 was not less than 30 years service life.(2) 95 porcelain have the fragility feature of pottery, and tensile strength is lower, is prone to crackle in the course of work that HTHP rotates at a high speed, and then fracture, and this is that desulfurizer institute is unallowed.
Summary of the invention
The present invention is just in order to overcome above-mentioned deficiency, provide a kind of high temperature resistant, be able to bear strong corrosion, rapid heat cycle is good, tensile strength is high, the desulfurization atomizing of wear-resistant, long service life, satisfy and absorb SO
2The ceramic nozzle that mass transfer requires, the main improvement is the upper Al of employing of material selection
2O
3Micro mist and ZrO
2Nano powder its objective is and uses ZrO as matrix material
2Toughness reinforcing Al
2O
3Ceramic material had both showed ZrO
2High tenacity and the high-intensity advantage of pottery have kept again Al
2O
3The high-intensity characteristic of pottery.With bonding clay and mineralizer gel casting forming sintering again, specifically implement like this:
Atomization jetting nozzle for desulfurization of flue-gas is characterized in that component and weight proportion are:
α--Al
2O
3Micro mist 1.8-3 μ m 70-76%
T-ZrO
2Nano powder 60-100nm 4-15%
Bonding clay 8-19%
Mineralizer 6-16%
Add:
The aqueous solution 4-7% of methylcellulose
The used mineralizer of the present invention is talcum, technical calcium carbonate, TiO
2, Cr
2O
3A kind of or the combination, this type oxide has and Al
2O
3Close lattice paprmeter is the oxide that appraises at the current rate simultaneously, because the effect of appraising at the current rate makes Al
2O
3The inner crystal defect that produces, activation lattice, acceleration of sintering can make sintering temperature reduce.
That the methylcellulose that adds among the present invention plays is lubricated, the effect of plasticising, dispersant.
The manufacture method of this atomization jetting nozzle for desulfurization of flue-gas is with alchlor micro mist, zirconia nano-powder, bonding clay and mineralizer in proportion after the assembly, add 4-7% methylated cellulose aqueous solution mixing and ball milling more than 24 hours, old more than 24 hours, gel casting forming, 1500-1600 ℃ following sintering 2-3 hour.
In order to make properties of product better, reach that helical surface is highly polished, fluid resistance is little, good, the high temperature resistant and anti-deep-etching of rapid heat cycle, tensile strength height, the characteristics such as long service life, the ceramic nozzle surface behind the sintering also is coated with α-Al
2O
3Ceramic membrane, concrete operation method be with ceramic nozzle with ultrasonic washing after, carry out repeatedly plated film with falling liquid method coating machine at ceramic nozzle, the complete one deck of every plating is at 150-160 ℃ of drying box heat treatment 8-13min, 460-470 ℃ of heat treatment 15-20min heat-treats in high-temperature electric resistance furnace after film reaches thickness requirement.
Film on the ceramic nozzle plated surface is fine and close α-Al
2O
3The colloid coating, this α-Al
2O
3Colloid is as predecessor take aluminium isopropoxide, water is solvent, nitric acid is peptizing agent, with dispersion method preparation, be specially: in deionized water, add aluminium isopropoxide in 75-85 ℃ of water-bath and magnetic agitation 35-40min, add again nitric acid, 75-85 ℃ of water-bath and magnetic agitation 14-17h, 85-90 ℃ of lower water-bath left standstill 23-26 hour and got, and the mol ratio of aluminium isopropoxide, water, nitric acid is 1: 90-95: 0.3-0.8.
Atomization jetting nozzle for desulfurization of flue-gas provided by the invention, high temperature resistant, be able to bear strong corrosion, rapid heat cycle is good, tensile strength is high, wear-resistant, long service life, satisfy to absorb SO
2The mass transfer requirement reaches the standard of national environmental protection industry HJ/T179-2005 and satisfies the requirement of the coal-fired unit wet process of FGD of thermoelectricity.
The specific embodiment
Embodiment 1, atomization jetting nozzle for desulfurization of flue-gas
Be α-Al of 1.8-3 μ m with particle mean size
2O
375 parts of micro mists, particle mean size are the t-ZrO of 60-100nm
25 parts of composite powders, 13 parts of bonding clays, 7 parts in talcum, the aqueous solution ball milling that adds again 6.3 parts of methylcellulose more than 24 hours, old more than 24 hours, gel casting forming was 1580 ℃ of sintering 2 hours.
Product surface behind the sintering plates a fine and close α-Al
2O
3The colloid coating.Product is after ultrasonic wave cleans, on ceramic nozzle, carry out plated film repeatedly with falling liquid method coating machine, the intact one deck of every plating is at 150-160 ℃ of drying box heat treatment 8-13min, and 460-470 ℃ of heat treatment 15-20min heat-treats in high-temperature electric resistance furnace after film reaches thickness requirement.Fine and close α-Al wherein
2O
3The manufacture method of colloid coating is to add aluminium isopropoxide in 75-85 ℃ of water-bath and magnetic agitation 35-40min in deionized water, add again nitric acid, 75-85 ℃ of water-bath and magnetic agitation 14-17h, 85-90 ℃ of lower water-bath, left standstill 23-26 hour and got, the mol ratio of aluminium isopropoxide, water, nitric acid is 1: 90-95: 0.3-0.8.
The ceramic nozzle of making is through performance measurement, tensile strength 188.4MPa, compression strength 450MPa, acid resistance 99%, fastness to alkali 98%, rapid heat cycle 280.6-23 ℃ (in the water three times do not split).
Embodiment 2, reference example 1, and the component proportioning of atomization jetting nozzle for desulfurization of flue-gas is: particle mean size is α-Al of 1.8-3 μ m
2O
370 parts of micro mists, particle mean size are the t-ZrO of 60-100nm
215 parts of composite powders, 8 parts of bonding clays, 3 parts of technical calcium carbonates, TiO
24 parts, the aqueous solution ball milling that adds again 5 parts of methylcellulose more than 24 hours, old more than 24 hours, gel casting forming was 1500 ℃ of sintering 3 hours.
Coating process is with embodiment 1.
Embodiment 3, reference example 1, and the component proportioning of atomization jetting nozzle for desulfurization of flue-gas is: particle mean size is α-Al of 1.8-3 μ m
2O
370 parts of micro mists, particle mean size are the t-ZrO of 60-100nm
26 parts of composite powders, 8 parts of bonding clays, Cr
2O
36 parts of 10 parts, talcum, the aqueous solution ball milling that adds again 4 parts of methylcellulose more than 24 hours, old more than 24 hours, gel casting forming was 1600 ℃ of sintering 2 hours.
Coating process is with embodiment 1.
Embodiment 4, reference example 1, and the component proportioning of atomization jetting nozzle for desulfurization of flue-gas is: particle mean size is α-Al of 1.8-3 μ m
2O
376 parts of micro mists, particle mean size are the t-ZrO of 60-100nm
28 parts of composite powders, 10 parts of bonding clays, 6 parts in talcum, the aqueous solution ball milling that adds again 7 parts of methylcellulose more than 24 hours, old more than 24 hours, gel casting forming was 1550 ℃ of sintering 2.5 hours.
Coating process is with embodiment 1.
Embodiment 5, reference example 1, and the component proportioning of atomization jetting nozzle for desulfurization of flue-gas is: particle mean size is α-Al of 1.8-3 μ m
2O
371 parts of micro mists, particle mean size are the t-ZrO of 60-100nm
24 parts of composite powders, 19 parts of bonding clays, 6 parts of technical calcium carbonates, the aqueous solution ball milling that adds again 6 parts of methylcellulose more than 24 hours, old more than 24 hours, gel casting forming was 1580 ℃ of sintering 2.5 hours.
Coating process is with embodiment 1.
Claims (7)
1. atomization jetting nozzle for desulfurization of flue-gas is characterized in that component and weight proportion are:
α-Al
2O
3Micro mist 1.8-3 μ m 70-76%
T-ZrO
2Nano powder 60-100nm 4-15%
Bonding clay 8-19%
Mineralizer 6-16%
Add:
The aqueous solution 4-7% of methylcellulose
2. atomization jetting nozzle for desulfurization of flue-gas according to claim 1 is characterized in that mineralizer is talcum, technical calcium carbonate, TiO
2, Cr
2O
3A kind of or the combination.
3. atomization jetting nozzle for desulfurization of flue-gas according to claim 1, it is characterized in that manufacture method is with alchlor micro mist, zirconia nano-powder, bonding clay and mineralizer in proportion after the assembly, add the methylated cellulose aqueous solution mixing and ball milling more than 24 hours, old more than 24 hours, gel casting forming, 1500-1600 ℃ following sintering 2-3 hour.
4. according to claim 1,2, one of 3 described atomization jetting nozzle for desulfurization of flue-gas, it is characterized in that the ceramic nozzle surface behind the sintering is coated with α-Al
2O
3Ceramic membrane.
5. atomization jetting nozzle for desulfurization of flue-gas according to claim 4 is characterized in that plating α-Al
2O
3Ceramic membrane be with ceramic nozzle with ultrasonic washing after, carry out repeatedly plated film with falling liquid method coating machine at ceramic nozzle, the complete one deck of every plating is at 150-160 ℃ of drying box heat treatment 8-13min, and 460-470 ℃ of heat treatment 15-20min heat-treats in high-temperature electric resistance furnace after film reaches thickness requirement.
6. atomization jetting nozzle for desulfurization of flue-gas according to claim 4 is characterized in that the film on the ceramic nozzle plated surface is fine and close α-Al
2O
3The colloid coating.
7. atomization jetting nozzle for desulfurization of flue-gas according to claim 6 is characterized in that fine and close α-Al
2O
3The manufacture method of colloid coating is to add aluminium isopropoxide in 75-85 ℃ of water-bath and magnetic agitation 35-40min in deionized water, add again nitric acid, 75-85 ℃ of water-bath and magnetic agitation 14-17h, 85-90 ℃ of lower water-bath, left standstill 23-26 hour and got, the mol ratio of aluminium isopropoxide, water, nitric acid is 1: 90-95: 0.3-0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100377910A CN101002997B (en) | 2006-01-16 | 2006-01-16 | Atomization jetting nozzle for desulfurization of flue-gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100377910A CN101002997B (en) | 2006-01-16 | 2006-01-16 | Atomization jetting nozzle for desulfurization of flue-gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101002997A true CN101002997A (en) | 2007-07-25 |
| CN101002997B CN101002997B (en) | 2010-09-08 |
Family
ID=38702510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100377910A Expired - Fee Related CN101002997B (en) | 2006-01-16 | 2006-01-16 | Atomization jetting nozzle for desulfurization of flue-gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482552A (en) * | 2014-12-17 | 2015-04-01 | 东莞市昊鸿五金科技有限公司 | Manufacturing process of fire grate and fire grate for barbecue |
| CN105833668A (en) * | 2015-01-15 | 2016-08-10 | 北京中天元环境工程有限责任公司 | Flue gas desulfurization tower |
| CN107522478A (en) * | 2017-08-24 | 2017-12-29 | 广州普华灵动机器人技术有限公司 | Ceramic burner process for making and ceramic burner |
| CN113429209A (en) * | 2021-06-16 | 2021-09-24 | 咸阳陶瓷研究设计院有限公司 | Preparation method of high solid-phase content barren grouting material for desulfurization nozzle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003340318A (en) * | 2002-05-24 | 2003-12-02 | Kyocera Corp | Nozzle made of ceramic and manufacturing method therefor |
| CN1309680C (en) * | 2003-07-09 | 2007-04-11 | 山东硅苑新材料科技股份有限公司 | Low-temperature sintered complex phase abrasion resistant ceramic material |
-
2006
- 2006-01-16 CN CN2006100377910A patent/CN101002997B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482552A (en) * | 2014-12-17 | 2015-04-01 | 东莞市昊鸿五金科技有限公司 | Manufacturing process of fire grate and fire grate for barbecue |
| CN105833668A (en) * | 2015-01-15 | 2016-08-10 | 北京中天元环境工程有限责任公司 | Flue gas desulfurization tower |
| CN107522478A (en) * | 2017-08-24 | 2017-12-29 | 广州普华灵动机器人技术有限公司 | Ceramic burner process for making and ceramic burner |
| CN113429209A (en) * | 2021-06-16 | 2021-09-24 | 咸阳陶瓷研究设计院有限公司 | Preparation method of high solid-phase content barren grouting material for desulfurization nozzle |
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| Publication number | Publication date |
|---|---|
| CN101002997B (en) | 2010-09-08 |
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Owner name: YIXING ZHONGHUAN REFRACTORY MATERIAL CO., LTD. Free format text: FORMER OWNER: JIANGSU PROV. CERAMIC RESEARCH INST. CO., LTD. Effective date: 20130815 |
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Effective date of registration: 20130815 Address after: The streets of Yicheng Nanyuan village in Yixing City, Jiangsu province 214200 Patentee after: Yixing Zhonghuan Refractory Material Co., Ltd. Address before: Yixing City, Jiangsu province 214221 dingshuzhen Patentee before: Jiangsu Prov. Ceramic Research Inst. Co., Ltd. |
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