CN105749725A - Desulfurizing tower system with oxidation device of improved structure - Google Patents
Desulfurizing tower system with oxidation device of improved structure Download PDFInfo
- Publication number
- CN105749725A CN105749725A CN201610321842.6A CN201610321842A CN105749725A CN 105749725 A CN105749725 A CN 105749725A CN 201610321842 A CN201610321842 A CN 201610321842A CN 105749725 A CN105749725 A CN 105749725A
- Authority
- CN
- China
- Prior art keywords
- desulfurizing tower
- oxidation
- gas
- section
- tower system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/11—Air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/102—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a desulfurizing tower system with an oxidation device of an improved structure, and belongs to the technical field of desulfurization. A fume inlet is formed in the middle of a desulfurizing tower; a fume outlet is formed in the top of the desulfurizing tower; a demisting section, an absorbing section, a cooling section and an oxidation tank are sequentially arranged from top to bottom inside the desulfurizing tower; the demisting section is arranged below the fume outlet; the cooling section is arranged below the absorbing section in a position corresponding to the fume inlet; the oxidation tank is arranged at the bottom of the desulfurizing tower and is filled with a circulation absorption mixed liquid; an air distributor and a multi-layer gas-liquid distributor are arranged inside the oxidation tank. By adoption of the desulfurizing tower system, the gas-liquid contact area is greatly increased, and the reaction efficiency is improved. According to the desulfurizing tower system with the oxidation device of the improved structure, the oxidation efficiency of ammonium sulfite is up to 99%.
Description
Technical field
The present invention relates to a kind of desulfurizing tower system having and improving structure oxidation unit, belong to technical field of desulfurization.
Background technology
Coal-burning power plant of China is numerous, and the medium and small unit (below 100MW unit) that the enterprise such as particularly heat supply, large-scale petrochemical, chemical industry, metallurgy has spreads all over the place especially.The coal-fired SO produced2Severe contamination is caused, for reducing SO to air2Harm, the newly-built coal-fired plant boiler of national requirements must build flue gas desulfurization device simultaneously, and in-service power plant also wants undertaking treatment within a prescribed limit of time.Due to the desulfurization method of limestone-gypsum technique that desulfurizer investment is relatively big, leading at present, medium or small hot power station is difficult to bear, and operating cost is higher, and desulfurizing byproduct Gypsum Fibrosum is by the restriction of quality, yield and cost, and purposes is limited, causes extra processing cost.Therefore seeking a kind of compared with calcium method, have relatively low operating cost, the ammonia desulfurizing process of producing ammonium sulfate byproduct chemical fertilizer, will be substantially reduced flue gas desulfurization cost simultaneously.
At present, more domestic arcola adopts a kind of easy ammonia process spray column desulfurizer, adopts the top ammonia at tower directly to spray, but owing to spray flux is few, flue-gas temperature high (～100 DEG C), in addition ammonia highly volatile, makes the flue gas of discharge carry substantial amounts of free ammonia secretly, and desulfuration efficiency is extremely low, it is difficult to reclaim ammonium sulfate product, causing desulfurizing agent to run off in a large number, operating cost is high, but also defines the secondary pollution of ammonia.
More external companies, adopt the ammonia desulfuration equipment of spray column technology, owing to meet higher mass transfer, thermal transmission requirement, so the liquid-gas ratio of desulfurizing tower is very big, close to desulfurization method of limestone-gypsum technique, the flow making absorption cycle liquid is very big, energy consumption is bigger, simultaneously because liquid film is carried secretly seriously, the mist that removes of desulfurizing tower requires significantly high, even have employed electricity except mist, and whole device requirement for anticorrosion is high in addition, make the construction costs of the ammonia process of desulfurization more taller than equal desulfurization method of limestone-gypsum technique～20%, seriously constrain the popularization of ammonia-process desulfurization technique.
Traditional ammonia process of desulfurization oxidation unit includes oxidation fan and oxidation spray gun, by the disturbance of stirring or pump bottom desulfurizing tower, makes liquid distribution uniform, sprays into bottom desulfurizing tower by oxidation spray gun by oxidation air so that oxidation air and liquid are fully contacted.But, because after gas sprays in spray gun, skewness, therefore at oxidation panel it cannot be guaranteed that required oxidation efficiency so that in the process of circulation, the ammonium sulfite in circulation fluid contacts with high-temperature flue gas, thus resolving into ammonia and the sulfur dioxide of gaseous state, form aerosol in systems.
On July 6th, 2011 is announced, number of patent application is CN201020584919.7, name is called that the Chinese utility model patent of " a kind of desulfurizing tower being provided with oxidation spray gun and agitator " discloses a kind of desulfurizing tower being provided with oxidation spray gun and agitator, this desulfurizing tower is flue-gas dust-removing and desulfurization tower, oxidation spray gun and agitator are arranged on from 1～1.2m place at the bottom of tower, oxidation spray gun is extend into the inside of desulfurizing tower side arm by the outside of desulfurizing tower sidewall, and by downward for the spout of oxidation spray gun；The driving mechanism of agitator is arranged on the outside of desulfurizing tower sidewall, and the main shaft of agitator extend into the inside of desulfurizing tower side arm, and in the end of main shaft equipped with stirring flabellum, the installation site of stirring flabellum is corresponding with the nozzle exit area of oxidation spray gun.Owing to the addition of oxidation spray gun and agitator in this desulfurizing tower, thus can accelerate calcium sulfite and be converted into the conversion rate of calcium sulfate, simultaneously because the constantly stirring of agitator can reduce the amount of scale buildup within tower body.This improvement has simple in construction, effect outstanding feature.This technical scheme have drawbacks in that because after gas sprays in spray gun, skewness, therefore at oxidation panel it cannot be guaranteed that required oxidation efficiency, make in the process of circulation, ammonium sulfite in circulation fluid contacts with high-temperature flue gas, thus resolving into ammonia and the sulfur dioxide of gaseous state, form aerosol in systems.
JIUYUE in 2011 bulletin on the 7th, number of patent application is CN201120017964.9, name is called that the Chinese utility model patent of " desulphurization tower combining by using ammonia process " discloses a kind of desulphurization tower combining by using ammonia process, design by reverse-flow spray column, the middle part of described desulfurizing tower is provided with gas approach, top is provided with exhanst gas outlet, and the inside of desulfurizing tower is sequentially provided with from top to bottom: except mist section, absorber portion, temperature descending section and oxidation pond, the described lower section being arranged on exhanst gas outlet except mist section；Described temperature descending section is arranged on the lower section of absorber portion, the position of corresponding gas approach；It is characterized in that, described absorber portion is provided with cyclic absorption spraying layer；Described absorber portion be provided above aerosol washing section；Described absorber portion and aerosol washing section collecting tank separate；Described aerosol washing section is arranged on except the lower section of mist section, is provided with Water spray scrubber layer.The desulphurization tower combining by using ammonia process of this utility model can complete flue gas desulfurization course efficient, energy-conservationly, has bigger industrial prospect.The shortcoming of this technical scheme is equally: although in this technical scheme, the inside of the oxidation pond of desulfurizing tower is provided with oxidation air distribution comb and pump agitating device, but after same gas sprays in spray gun, skewness, therefore at oxidation panel it cannot be guaranteed that required oxidation efficiency.
Therefore it provides a kind of technique is simple, gas liquid interfacial area can be improved greatly so that the have desulfurizing tower system of improving structure oxidation unit fully oxidized at desulfurizing tower just becomes the technical barrier that this technical field is badly in need of solving.
Summary of the invention
Present invention aim at, for above-mentioned deficiency, it is provided that a kind of technique is simple, can improve gas liquid interfacial area greatly so that in the desulfurizing tower system with improvement structure oxidation unit that desulfurizing tower is fully oxidized.
For achieving the above object, technical scheme provided by the present invention is:
A kind of have the desulfurizing tower system improving structure oxidation unit, design by reverse-flow spray column, the middle part of described desulfurizing tower is provided with gas approach, and top is provided with exhanst gas outlet, and the inside of desulfurizing tower is sequentially provided with from top to bottom: except mist section, absorber portion, temperature descending section and oxidation pond；The described lower section being arranged on exhanst gas outlet except mist section；Described temperature descending section is arranged on the lower section of absorber portion, and the position of corresponding gas approach, described oxidation pond is arranged on the bottom of desulfurizing tower, built-in cyclic absorption mixed liquor；It is characterized in that: the inside of described oxidation pond is provided with the air sparger of herring-bone form and the gas-liquid distributor of dense holes tabular, the outside of oxidation pond is provided with the connection oxidation air distribution compressed air inlet of comb, the ammonia inlet adding ammonia in desulfurizing tower and absorption cycle pump intake, for circulating, by absorbing mixed liquor, the cyclic absorption spraying layer being delivered to absorber portion；The bottom of oxidation pond is additionally provided with ammonium sulfate slurry pump, sends into postprocessing working procedures for the ammonium sulfate that will generate.
Preferably, described air sparger is the structure of herring-bone form, connecting branch on supervisor, arm perforate, facilitates bubble formation, described structure can improve the distributing homogeneity of oxygen, reduces the particle mean size of bubble, increases gas liquid interfacial area.
Preferably, described gas-liquid distributor adopts the orifice plate of the percent opening of reasonable computation to be installed in desulfurizing tower.
Preferably, the percent opening of described gas-liquid distributor is at 5%-10%.
Preferably, described gas-liquid distributor is provided with 3-6 layer.
The processing step with the desulfurizing tower system improving structure oxidation unit of the present invention is as follows:
(1) flue gas and ammonification circulation fluid counter current contacting, sponge the sulfur dioxide in flue gas, forms ammonium sulfite solution；
(2) ammonium sulfite solution is entered bottom desulfurizing tower by pipeline self；
(3) under the effect of oxidation air, fully oxidized, obtain ammonium sulfate；
(4) ammonium sulfate extraction by pump, sulfur ammonium system after entrance, carry out the operation of discharging.
Beneficial effect:
Provided by the invention have the desulfurizing tower system improving structure oxidation unit, technique is simple, it is easily achieved, adopt the aerocolloidal oxidation unit of this solution, by oxidation solution oxidation completely, avoid the ammonium sulfite in circulation fluid to decompose, decrease the contact of gaseous ammonia and sulfur dioxide, reduce aerocolloidal generation；Ensure that in concentration cycles liquid simultaneously and contain only ammonium sulfate, it is to avoid the process not only absorbing but also concentrating, further avoid the decomposition of ammonium sulfite.
Below by the drawings and specific embodiments, the present invention will be further described, but is not meant to limiting the scope of the invention.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention has the desulfurizing tower system improving structure oxidation unit.
Main Reference Numerals illustrates:
1 desulfurizing tower 2 gas approach
3 air sparger 4 compressed air inlets
5 oxidation panel 6 gas-liquid distributors
Detailed description of the invention
Embodiment 1
As it is shown in figure 1, be that the present invention has the structural representation of desulfurizing tower system improving structure oxidation unit；Wherein, there is described in the desulfurizing tower system improving structure oxidation unit and include desulfurizing tower 1, gas approach 2, air sparger 3, compressed air inlet 4, oxidation panel 5, gas-liquid distributor 6.
The present invention has the desulfurizing tower system improving structure oxidation unit, designs by reverse-flow spray column, and the middle part of described desulfurizing tower 1 is provided with gas approach 2, and the inside of desulfurizing tower 1 is provided with oxidation panel 5；The inside of this oxidation panel 5 is provided with the air sparger 3 of herring-bone form and the gas-liquid distributor 6 of the intensive perforate of reasonable computation, and the outside of oxidation panel 5 is provided with the compressed air inlet 4 connecting air sparger 3.
Described air sparger is the structure of herring-bone form, connecting branch on supervisor, meets percent opening at 5%-10%, facilitates bubble to occur, described structure can improve the distributing homogeneity of oxygen, reduces the particle mean size of bubble, increases gas liquid interfacial area.
The percent opening of described gas-liquid distributor is at 5%-10%.
Described gas-liquid distributor is provided with 3-6 layer.
By the effect of which floor gas-liquid distributor, rising in the process becoming big at bubble, being dispersed as minute bubbles, thus increasing gas liquid interfacial area.
The processing step with the desulfurizing tower system improving structure oxidation unit of the present invention is as follows:
(1) flue gas and ammonification circulation fluid counter current contacting, sponge the sulfur dioxide in flue gas, forms ammonium sulfite solution；
(2) ammonium sulfite solution is entered bottom desulfurizing tower by pipeline self；
(3) under the effect of oxidation air, fully oxidized, obtain ammonium sulfate；
(4) ammonium sulfate extraction by pump, sulfur ammonium system after entrance, carry out the operation of discharging.
Under the perturbation action of pump, making serosity be mixed into uniform solution, oxidation air is blasted reaction tank by oxidation fan, and oxidation air is dispersed into tiny bubble through multilamellar gas-liquid distributor, and is distributed in serosity.Making part inferior sulfate radical oxidized in spray district, the inferior sulfate radical of remainder is oxidized air complete oxidation bottom desulfurizing tower.
Flue gas exits into desulfurizing tower 1 from air-introduced machine, absorbs the SO in flue gas in desulfurizing tower 12, absorb liquid and return oxidation panel by tube overflow, the effect through oxidation air distributor and multilamellar gas-liquid distributor in the bottom of desulfurizing tower 1, it is forced to aoxidize under the effect of oxidation air.
The present invention has in the desulfurizing tower system improving structure oxidation unit, and the oxidized efficiency of ammonium sulfite reaches 99%.
The present invention has the desulfurizing tower system improving structure oxidation unit at oxidation panel by arranging oxidation air distributor and multilamellar gas-liquid distributor so that gas liquid interfacial area is greatly increased, and reaction efficiency improves.The function of oxidation air system is to change into ammonium sulfate absorbing gained ammonium sulfite.Delivering to sulfur ammonium system by pump continuous print absorbing liquid, by controlling to discharge slurry flow, maintenance loop slurry concentration (mass fraction) is at about 8%-25%.
The explanation of above-described embodiment, is not the restriction to present configuration, technique, any technique present invention made the structure after simple transformation, or has identical function, belongs to the protection domain of patent of the present invention.
Claims (4)
1. having the desulfurizing tower system improving structure oxidation unit, including desulfurizing tower, the middle part of described desulfurizing tower is provided with gas approach, and top is provided with exhanst gas outlet, is sequentially provided with from top to bottom inside described desulfurizing tower: except mist section, absorber portion, temperature descending section and oxidation pond；The described lower section being arranged on exhanst gas outlet except mist section；Described temperature descending section is arranged on the lower section of absorber portion, and the position of corresponding gas approach, described oxidation pond is arranged on the bottom of desulfurizing tower, built-in cyclic absorption mixed liquor；It is characterized in that: the inside of described oxidation pond is provided with the air sparger of herring-bone form and the gas-liquid distributor of dense holes tabular, the outside of oxidation pond is provided with the connection oxidation air distribution compressed air inlet of comb, the ammonia inlet adding ammonia in desulfurizing tower and absorption cycle pump intake；The bottom of oxidation pond is additionally provided with sulfur ammonium slurry pump.
2. according to claim 1 have the desulfurizing tower system improving structure oxidation unit, it is characterised in that: described air sparger is the structure of herring-bone form, connecting branch on supervisor, arm perforate.
3. according to claim 1 have the desulfurizing tower system improving structure oxidation unit, it is characterised in that: the percent opening of the gas-liquid distributor of described dense holes tabular is 5%-10%.
4. according to claim 3 have the desulfurizing tower system improving structure oxidation unit, it is characterised in that: the gas-liquid distributor of described dense holes tabular is provided with 3-6 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321842.6A CN105749725A (en) | 2016-05-14 | 2016-05-14 | Desulfurizing tower system with oxidation device of improved structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610321842.6A CN105749725A (en) | 2016-05-14 | 2016-05-14 | Desulfurizing tower system with oxidation device of improved structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105749725A true CN105749725A (en) | 2016-07-13 |
Family
ID=56323999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610321842.6A Pending CN105749725A (en) | 2016-05-14 | 2016-05-14 | Desulfurizing tower system with oxidation device of improved structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105749725A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930374A (en) * | 2017-11-28 | 2018-04-20 | 江苏民生重工有限公司 | A kind of efficient oxidation wet desulfurization system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168065A (en) * | 1991-11-27 | 1992-12-01 | The Babcock & Wilcox Company | Forced oxidation monitoring and control system |
| CN201959716U (en) * | 2011-01-20 | 2011-09-07 | 上海弗卡斯环保工程有限公司 | Combination ammonia desulfurization tower |
| CN103041678A (en) * | 2012-12-21 | 2013-04-17 | 浙江天蓝环保技术股份有限公司 | Ammonia flue gas desulfuration and denitration combined process and device |
| CN103585874A (en) * | 2013-12-03 | 2014-02-19 | 张波 | System and method for desulphurization and denitration |
| CN205650069U (en) * | 2016-05-14 | 2016-10-19 | 张波 | Desulfurizing tower system with improve structure oxidation unit |
-
2016
- 2016-05-14 CN CN201610321842.6A patent/CN105749725A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168065A (en) * | 1991-11-27 | 1992-12-01 | The Babcock & Wilcox Company | Forced oxidation monitoring and control system |
| CN201959716U (en) * | 2011-01-20 | 2011-09-07 | 上海弗卡斯环保工程有限公司 | Combination ammonia desulfurization tower |
| CN103041678A (en) * | 2012-12-21 | 2013-04-17 | 浙江天蓝环保技术股份有限公司 | Ammonia flue gas desulfuration and denitration combined process and device |
| CN103585874A (en) * | 2013-12-03 | 2014-02-19 | 张波 | System and method for desulphurization and denitration |
| CN205650069U (en) * | 2016-05-14 | 2016-10-19 | 张波 | Desulfurizing tower system with improve structure oxidation unit |
Non-Patent Citations (1)
| Title |
|---|
| 王学刚等: "《水处理工程（下册）》", 31 January 2015, 中国环境出版社·北京 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930374A (en) * | 2017-11-28 | 2018-04-20 | 江苏民生重工有限公司 | A kind of efficient oxidation wet desulfurization system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201880482U (en) | Stepped spray tower for desulfurization by ammonia method | |
| CN205700119U (en) | A kind of efficient desulfurizing tower | |
| CN200998639Y (en) | Concentrated crystallization and absorbed oxidation combined type ammonia process desulfuration tower | |
| CN204865480U (en) | High -efficient desulfurization, denitration, dust removal and water conservation integration process systems | |
| CN202823151U (en) | Multistage spray efficient wet process of flue gas desulfurization and synergistic mercury removal integrated device | |
| CN204710082U (en) | A kind of low-temperature denitration of flue gas system | |
| CN104399367B (en) | A kind of flue washing device with scaling shape orifice plate | |
| CN106166434A (en) | A kind of ozone oxidation double tower ammonia process of desulfurization denitrating technique and system thereof | |
| CN101543724A (en) | Ammonia desulphurization method suitable for sintering flue gas treatment | |
| CN202654927U (en) | Rotational flow rectification gas-liquid absorbing tower | |
| CN205796943U (en) | Ozone oxidation double tower ammonia process of desulfurization denitrating system | |
| KR20140091538A (en) | Dual-chamber multi-absorption wet flue desulfurization device | |
| CN105056732A (en) | Waste gas treatment system | |
| US20220331735A1 (en) | Ammonia desulphurization and oxidation apparatus and method | |
| CN205760545U (en) | Three circulating flue gas desulfurization tower or the systems for wet ammonia process desulfurizing | |
| CN107398175B (en) | Desulfurization and denitrification integrated reactor for carbon-based catalyst | |
| CN201214046Y (en) | Ammonia process desulphurizing device for reducing ammonia escape | |
| CN104998530A (en) | Sulfuric acid tail gas desulphurization device and method | |
| CN205650069U (en) | Desulfurizing tower system with improve structure oxidation unit | |
| CN201085985Y (en) | Double-return circuit spray column | |
| CN204320092U (en) | A kind of flue gas washing mechanism with convergent-divergent shape orifice plate | |
| CN105749725A (en) | Desulfurizing tower system with oxidation device of improved structure | |
| CN201371033Y (en) | Novel mixed flow type flue gas washing tower | |
| CN116899397A (en) | Oxidation tuber pipe structure for wet flue gas desulfurization | |
| CN202590600U (en) | Desulfurization device for preparing ammonium bisulfite solution through ammonia process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160713 |