CN101138697A - Wet flue gas desulfurizing absorptive tower - Google Patents
Wet flue gas desulfurizing absorptive tower Download PDFInfo
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- CN101138697A CN101138697A CNA2006101479818A CN200610147981A CN101138697A CN 101138697 A CN101138697 A CN 101138697A CN A2006101479818 A CNA2006101479818 A CN A2006101479818A CN 200610147981 A CN200610147981 A CN 200610147981A CN 101138697 A CN101138697 A CN 101138697A
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Abstract
The present invention discloses a wet flue gas desulphurization absorption tower. The absorption tower is provided with a square tower body structure. The tower body can be made of concrete completely or carbon steel materials completely, or concrete plus carbon steel. A main spray pipe of the absorption tower is arranged at the external side of the tower body. The present invention can save the manufacture cost, and is provided with the excellent airflow distribution characteristic, and the high reliability and stability.
Description
Technical field
The present invention relates to a kind of absorption tower that is used for wet fuel gas desulfurizing technology.
Background technology
Acid deposition and SO
2Pollute is the great environmental problem that international scientific circle and national governments are concerned about always.China is production of energy big country, also is energy-consuming big country, will produce a large amount of SO in electrical energy production
2Enter atmosphere with flue gas, acid deposition and SO
2Pollution has caused very big destruction to the ecological environment of China, administers acid deposition and SO at present
2Pollute and become the emphasis that China administers environment.
SO in the atmosphere
2Combine formation acid rain with precipitation, meeting serious harm residents ' health, the corrosion construction material destroys the ecosystem, causes enormous economic loss, has become the important environmental factor of restriction Chinese society economic development.Cut down the discharge capacity of sulfur dioxide, the control sulfur dioxide in air pollutes, the protection atmosphere quality, be China environmental protection at present and in the following long duration important topic it
The sulfur dioxide pollution control technology is a lot of, and such as improving energy resource structure, adopting clean fuel etc., wherein, flue gas desulfurization is effectively to cut down SO
2The irreplaceable technology of discharge capacity.The method of flue gas desulfurization is a lot, and the basic principle according to physics and chemistry can be divided into three kinds of absorption processes, absorption method, catalysis method substantially.Absorption process is to purify SO in the flue gas
2Most important, most widely used method.Absorption process typically refers to the SO in the using liquid absorption cleaning flue gas
2, so absorption process flue gas desulfurization is also referred to as wet process of FGD.
The advantage of wet process of FGD is the desulfuration efficiency height, generally can reach more than 95%; The flue gas treating capacity is big, can with the large-sized boiler units match; Adaptability to coal is good, and the process of flue gas desulfurization is independently to work after boiler back end ductwork, can not disturb the burning of boiler, can not produce any influence to the thermal efficiency, the utilization rate of boiler unit.Common wet process of FGD technology is at present: adopting with lime stone or lime is absorbent, and end product is the lime stone of gypsum---gypsum method.
The brief introduction of limestone-gypsum wet fuel gas desulfurizing technology:
This technology mainly is to adopt lime stone cheap and easy to get as desulfurization absorbent, lime stone is through the pulverizing and jevigating powdering, mix stirring with water and make the absorption slurries, the lime stone slurry of being squeezed into the absorption tower by pump dissolves in the crystal region in slurries pond, absorption tower, by circulating pump the absorption slurries in the slurries pond is delivered to spraying layer.Flue gas enters the absorption tower by smoke inlet, contact mixing with flue gas from the absorption slurries of spraying layer ejection, calcium carbonate in sulfur in smoke and the slurries carries out chemical reaction and is absorbed and removes, and clean flue gas is removed droplet after chimney enters atmosphere by the demister that is installed in top, absorption tower after the desulfurization.Collect in the zoneofoxidation in slurries pond, absorption tower after absorbing the reaction of slurries and sulfur in smoke, the product of desulphurization reaction generation here generates calcium sulfate through the oxidation air forced oxidation, calcium sulfate crystallization in crystal region is separated out and is grown up, and end product is a gypsum.
The cylinder absorption tower brief introduction that the limestone-gypsum wet fuel gas desulfurizing technology is commonly used:
The absorption tower is one of wet process of FGD capital equipment, what application was more at present is that the cross section is circular spray void tower, as shown in Figure 1, slurries pond 9 is in aggregates with 4 designs of spray district, flue gas enters the absorption tower from the gas approach 10 of middle and lower part, absorption tower, zone above import 10 is spray district 4, and spraying layer 3 tops are the demister 2 of two-stage tandem, and the clean flue gas after the desulfurization demist is discharged the absorption tower from the exhanst gas outlet 1 of cat head; The bottom on absorption tower is slurries pond 9, and slurries pond 9 is the tower body basis, also is the container of collecting the whereabouts slurries, and the top in slurries pond 9 is divided into zoneofoxidation, and the bottom is divided into crystal region.It above the slurries pond 9 cooling zone 5.The tower body bottom is provided with slurry circulating pump 6, oxidation air pipe 7 and agitator 8.Shower 11 is arranged in the tower.The structural material that adopt on existing circular absorption tower is a carbon steel, the inside lining anti-corrosive material.
The problems and shortcomings that exist:
Existing circular absorption tower be owing to will be incorporated in from top to bottom in the cylinder tower body except that fog-zone, uptake zone, zoneofoxidation, crystal region, thus tower body is higher, steel consumption is big, manufacturing cost is high, circulated sprinkling pump energy consumption greatly, the desulfuration efficiency inhomogeneous influence of distributions of being bullied is big.
Summary of the invention
In order to solve the problems of the technologies described above with not enough, the invention provides a kind of wet flue gas desulfurization absorption tower, it can not only save manufacturing cost, and has the uniform characteristic of high reliability, stability and excellent airflow.
For solving the problems of the technologies described above, the invention provides a kind of wet flue gas desulfurization absorption tower, comprise from top to bottom and remove fog-zone, spray district, slurries pond, described slurries pond comprises zoneofoxidation and crystal region, described spray district comprises spraying layer and spray trunk line, and the housing structure on this absorption tower is square.
Described absorption tower material adopts concrete and/or carbon steel material, promptly can adopt the whole concrete material, also can adopt full carbon steel material, or concrete adds the combination of carbon steel material.
The spray trunk line on described absorption tower is located at the tower body outside.
Compared with prior art, the invention has the advantages that:
1, the structural material of wet flue gas desulfurization absorption tower of the present invention can select for use whole concrete, full carbon steel or bottom to adopt concrete, the top composite construction of carbon steel.Full carbon steel lining rubber or glass flake are the materials that present absorption tower is generally selected for use, though the carbon steel liner has good anti-corrosion, service life is not long, and rubber and glass flake need frequent repairing.If adopt whole alloy, alloy-carbon steel composite board material, then involve great expense.The square structure absorption tower can adopt whole concrete structure brush fiberglass anticorrosion, and cost obviously is lower than above-mentioned different materials, and long service life, and maintenance is few.
2, the spray trunk line can be provided with outside tower.The absorption tower of common circular cross-section, its spray trunk line is arranged in the tower, the wear-resisting FRP of material selection (fiberglass) pipe, or outer lining rubber in the carbon steel.FRP pipeline cost height, and need establish brace summer in addition.The inside and outside rubber-lined pipe of carbon steel, its surface is washed away for a long time, and is fragile.The spray trunk line of wet flue gas desulfurization absorption tower of the present invention is arranged in outside the tower, and material gets final product with carbon steel liner rubber, and working environment, installation complexity all will be got well than being provided with in the tower.
3, because the absorption tower is a square structure, and gas approach flue and absorption tower body can be accomplished wide setting, therefore avoided the dead angle of flow of flue gas, flue gas more is easy to do on the longitudinal and transverse direction in absorption tower is evenly distributed.
4, in square absorption tower, because gas approach flue and absorption tower body can be accomplished wide setting, therefore the oneself height of inlet flue duct can reduce (wide, the height ratio of flue obviously reduce) significantly, cause the absorption tower body height to reduce, thereby reduced circulated sprinkling pump head and energy consumption.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation on existing cylinder absorption tower;
The structural representation of Fig. 2 wet flue gas desulfurization absorption tower of the present invention.
The specific embodiment
As shown in Figure 2, the invention provides a kind of wet flue gas desulfurization absorption tower, the housing structure on this absorption tower is square.
This absorption tower comprises exhanst gas outlet 21, spraying layer 22, spray trunk line 23, gas approach 24, slurries pond 25, demister zone 26.Wherein, spray trunk line 23 is located at the tower body outside.
The slurries that contain the finite concentration absorbent, be distributed in each layer arm of spraying layer 22 through spray trunk line 23, by the nozzle ejection that is arranged on the arm, form the fine and close flue gas washing district that distributes of slurries in the area of space between spraying layer 22 and slurries pond 25, former flue gas is from being scatter in the absorption tower after the gas approach 24 of middle and lower part, absorption tower enters the absorption tower and being formed evenly (vertical, transverse direction) ascending air, flue gas fully mixes with sprayed slurry in scrubbing section, make the pollutant (dust in the flue gas, acidic materials etc.) fully adsorbed, be dissolved in the washing slurries, flue gas is thoroughly purified and is become the clean flue gas that is rich in droplet in this zone, this flue gas is discharged by exhanst gas outlet 21 at last fully being removed moisture through demister zone 26 o'clock by the demister of two-stage tandem.
Absorption, dissolved that the slurries behind the flying dust and acidic materials fall to entering slurries pond 25 in the former flue gas, oxidized and crystallization in this zone, and finally finish the innoxious transfer process of sour gas.
Because the absorption tower is a square structure, gas approach flue 24 and absorption tower body can be accomplished wide setting, have therefore avoided the dead angle of flow of flue gas, flue gas more is easy to do on the longitudinal and transverse direction in absorption tower is evenly distributed.
Because the absorption tower is a square structure, this is to select for use the concrete towers body structure to create good structural condition.Therefore the structural material of square wet flue gas desulfurization absorption tower provided by the invention can select for use whole concrete, full carbon steel or bottom to adopt concrete, the top composite construction of carbon steel.
Full carbon steel lining rubber or glass flake are the materials that present absorption tower is generally selected for use, though the carbon steel liner has good anti-corrosion, service life is not long, and rubber and glass flake need frequent repairing.If adopt whole alloy, alloy-carbon steel composite board material then involves great expense.The square structure absorption tower can adopt xoncrete structure brush fiberglass anticorrosion, and cost obviously is lower than above-mentioned different materials, and long service life, and maintenance is few.
Claims (3)
1. wet flue gas desulfurization absorption tower, comprise from top to bottom and remove fog-zone, spray district, slurries pond, described slurries pond comprises zoneofoxidation and crystal region, and described spray district comprises spraying layer and spray trunk line, it is characterized in that the housing structure on this absorption tower is square.
2. wet flue gas desulfurization absorption tower according to claim 1 is characterized in that, described absorption tower material adopts concrete and/or carbon steel material.
3. wet flue gas desulfurization absorption tower according to claim 1 is characterized in that, described spray trunk line is arranged at the tower body outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101479818A CN101138697A (en) | 2006-12-26 | 2006-12-26 | Wet flue gas desulfurizing absorptive tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101479818A CN101138697A (en) | 2006-12-26 | 2006-12-26 | Wet flue gas desulfurizing absorptive tower |
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| CN101138697A true CN101138697A (en) | 2008-03-12 |
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| CNA2006101479818A Pending CN101138697A (en) | 2006-12-26 | 2006-12-26 | Wet flue gas desulfurizing absorptive tower |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844036A (en) * | 2010-05-11 | 2010-09-29 | 上海龙净环保科技工程有限公司 | Wet flue gas desulfurization (WFGD) process for gypsum through oxidization in tower by using calcium-based strongly basic substance |
| CN101890290A (en) * | 2010-07-15 | 2010-11-24 | 华南理工大学 | High-voltage electrostatic composite atomization wet desulphurization device |
| CN101518712B (en) * | 2009-04-10 | 2011-02-09 | 湖南永清环保股份有限公司 | Method for controlling crystalline products in wet flue gas desulfurization slurry pool |
| CN102274688A (en) * | 2011-04-10 | 2011-12-14 | 江苏揽山环境科技有限公司 | Multistage spray absorbing device with high efficiency |
-
2006
- 2006-12-26 CN CNA2006101479818A patent/CN101138697A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101518712B (en) * | 2009-04-10 | 2011-02-09 | 湖南永清环保股份有限公司 | Method for controlling crystalline products in wet flue gas desulfurization slurry pool |
| CN101844036A (en) * | 2010-05-11 | 2010-09-29 | 上海龙净环保科技工程有限公司 | Wet flue gas desulfurization (WFGD) process for gypsum through oxidization in tower by using calcium-based strongly basic substance |
| CN101890290A (en) * | 2010-07-15 | 2010-11-24 | 华南理工大学 | High-voltage electrostatic composite atomization wet desulphurization device |
| CN102274688A (en) * | 2011-04-10 | 2011-12-14 | 江苏揽山环境科技有限公司 | Multistage spray absorbing device with high efficiency |
| CN102274688B (en) * | 2011-04-10 | 2013-06-26 | 江苏揽山环境科技有限公司 | Multistage spray absorbing device with high efficiency |
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