CN1575847A - Material circulation activating flue gas desulfurization method and apparatus - Google Patents
Material circulation activating flue gas desulfurization method and apparatus Download PDFInfo
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- CN1575847A CN1575847A CN 03141860 CN03141860A CN1575847A CN 1575847 A CN1575847 A CN 1575847A CN 03141860 CN03141860 CN 03141860 CN 03141860 A CN03141860 A CN 03141860A CN 1575847 A CN1575847 A CN 1575847A
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- separator
- desulfurizing agent
- activator
- flue gas
- desulfurizing
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Abstract
The present invention features that the apparatus consists of desulfurizing reactor tower, separator and activator. The newly added desulfurizing agent, the desulfurizing agent separated from the separator with un-reacted component and flyash are used as circulating material mixed with water in the activator to form mixed material with water content of at least 5 %. The mixed material is crushed, activated and reacted with SO2 in fume before being separated in the separator. The present invention has the advantages of no large grain slurry inside the desulfurizing tower, continuous crushing and cleaning of the reactant on the surface of the alkali grain in the circulated material to raise the activity of the mixture and the utilization of the desulfurizing agent, the utilization of the alkali matter in flyash to raise desulfurizing efficiency, and raised utilization of the desulfurizing apparatus.
Description
Technical field
The present invention relates to a kind of flue gas desulfurization technique and device, relate in particular to a kind of dry method and semidry method material cyclic activation fume desulphurization method and device, be used for removing sulfur oxide and other harmful sour gas of the flue gas of discharging by combustion apparatus such as fire coal, oil burning boiler and kilns, as HCL, HF etc.
Background technology
In common dry method and semi-dry process flue gas desulphurization technology, solid desulfurating agent and water contact activation mix with flue gas in desulfurizing tower, absorb sulfur in smoke and other sour gas.Because gas-solid reaction can only occur in the surface of solids, and reacted product will cover the surface of solid desulfurating agent particle, this will stop acidic gas in flue gas to react with the alkaline matter of solid desulfurating agent granule interior, make the reactivity passivation of desulfurizing agent, causing the utilization rate of desulfurizing agent very low, generally only is 40%～70%.As spray drying process when the Ca/S=1.5, its smoke desulfurization efficiency is about 80%, the utilization rate of calcium only is 50%, in-furnace calcium spraying afterbody humidification method is when Ca/S=2.0, its flue gas desulphuization rate is about 70%, and the utilization rate of calcium is less than 40%, and at present best flue gas circulating fluidized bed fume desulphurization method is when Ca/S=1.3, its flue gas desulphuization rate is about 90%, and the utilization rate of calcium also only is 70%.Because high temperature sintering contacts if only the alkaline matter in the coal ash is mixed with water, it is fully activated in addition, cause to waste.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned the deficiencies in the prior art, providing a kind of digests desulfurizing agent and activates, after by separator the desulfurizing agent that do not have complete reaction and flying dust being collected simultaneously, send into material cyclic activation fume desulphurization method and device that activator carries out sufficient fragmentation, activation.
Purpose of the present invention is achieved through the following technical solutions.The characteristics of method are:
A. the desulfurizing agent of initiate desulfurizing agent and the isolated non-complete reaction of separator and flying dust being sent into activator simultaneously as the water of recycle stock and injection fully is mixed into water content and is at least 5% mixed material;
B. mixed material fully contacts with sulfur in smoke after mixing, fragmentation and activation in activator and reacts, by separator it is separated from flue gas again, most of material wherein as recycle stock by repeatedly broken, activate and recycle.
Adopt a kind of material cyclic activation flue gas desulfur device of realizing said method, comprise desulfurization reaction tower, separator and activator, be characterized in, activator comprises cylindrical shell, steel ball or rod iron, tumbler, desulfurizing agent and recycle stock entry and exit, and water injector, activator is arranged between desulfurization reaction tower and the separator, is connected with separator with desulfurization reaction tower respectively with the mixed material tube connector by the recycle stock tube connector.
Activator can be the gyratory crusher system, or other breaker, as ball mill or vibrating mill system.
Because the present invention digests desulfurizing agent and activates, after by separator the desulfurizing agent that do not have complete reaction and flying dust being collected simultaneously, send into activator and carry out sufficient fragmentation, activation and the method and the device that recycle, therefore, compared with prior art have the following advantages: no oarse-grained slurries in desulfurizing tower, the substitute is and have higher concentration, diameter is at 0～40 μ m, moisture content is 10%～20% small solid particle, the reactant on the alkali grain surface in the recycle stock constantly obtains broken the removing, make the activity of mixture be greatly enhanced, this can not only make the utilization rate of desulfurizing agent reach more than 80%, can also effectively utilize the alkaline matter in the flying dust, reduce the consumption of desulfurizing agent significantly, and improve desulfuration efficiency.Thoroughly avoid simultaneously desulfurization reaction tower fouling and corrosion phenomenon, improved the availability of desulfurizer.Thereby the present invention is the low operating cost of a kind of no fouling and burn into, fume desulphurization method and device efficiently.
Description of drawings
Fig. 1 is the structural representation of material cyclic activation flue gas desulfur device;
Fig. 2 is a gyratory crusher activator structural representation.
The specific embodiment
The specific embodiment of the invention elaborates in conjunction with the accompanying drawings:
Desulfurizing agent, recycle stock and water are sent in the broken activator, because broken activator has broken function to material, can be with reacted, the cure alkali solid particle fragmentation of thing parcel of appearance, water can directly contact with alkaline matter, and with its effective activation.The alkaline matter for example activity of Ca (HO) 2 depends on the size of particle diameter and specific area, and the size of specific area is directly proportional with its weight moisture capacity, by to the fragmentation of desulfurizing agent and recycle stock and with the mixing of water, can improve not conglomeration of material and the weight moisture capacity can flow freely the time greatly, this is greatly enhanced with regard to the activity that makes mixed material.
Characteristics of the present invention be by to the fragmentation of desulfurizing agent and recycle stock, add water, activation, the weight moisture capacity of its mixed material is at least 5%, and (the broken activation of circulation) used to make wherein not that the desulfurizing agent of complete reaction and flying dust neutral and alkali material obtain repeatedly, increases substantially the utilization rate of desulfurizing agent and flying dust alkaline matter with this.
Improve the weight moisture capacity of mixture, can improve its specific area, also promptly improve its activity.Though by material is carried out fragmentation, the moisture content in the time of can improving it and can flow freely.But when the weight moisture capacity of mixture greater than 30% the time, conglomeration and bonding take place easily, this will result in blockage and corrosion etc.For the utilization rate that improves desulfurizing agent and the reliability of device, in the present invention, will be controlled at more than 5% through the weight moisture capacity of the mixture after the fragmentation activation, preferably in 10%～20% scope.After the mixed material of high-moisture percentage contacts with flue gas, the temperature of flue gas will reduce rapidly, and the flue-gas temperature in the desulfurizing tower generally is controlled between 60 ℃～80 ℃.
In the flue gas that coal-burning installation is got rid of, carry a large amount of flying dusts, and contain many alkaline matters in the flying dust, as CaO, MgO, K
2O and Na
2O etc.Because through high-temperature calcination, the surface of flying dust can form the shell of one deck densification, though with the water admixture activation, its activity is also very poor, this causes the alkaline matter in the grey shell to be not fully utilized.The present invention activates by flying dust being carried out fragmentation and adding water, and most alkaline matters of its inside can both be converted into highly active Ca (HO) after contacting with water
2, Mg (HO)
2, KHO and NaHO etc., so the activity of flying dust can obtain the raising of amplitude peak, they enter in the desulfurizing tower can same acidic gas in flue gas, as SO
2, fully reaction such as HCl, HF, this can reduce the consumption of desulfurizing agent significantly.
Because in the present invention, the alkaline matter in the flying dust can effectively be utilized, so desulfurizing agent can be solid-state calcium-based desulfurizing agent, and flying dust or other alkaline matter; Also can be liquid alkaline matter, they directly are sent in the activator be mixed together fragmentation, add the water activation with recycle stock; Desulfurizing agent can also be a lime stone, directly mixes with coal, join the burner calcining after, enter separator with flying dust and mixed material, separated after wherein the overwhelming majority enter activator together with recycle stock.
The activated device fragmentation of desulfurizing agent, add water activation after, enter desulfurizing tower and contact with flue gas, mixed flow, and and acidic gas in flue gas, as SO
2, reactions such as HCl, HF, produce corresponding salt.Desulfurizing agent is after once passing through desulfurizing tower.Still have the part of significant proportion to fail to participate in reaction, by separator, the part that separates is delivered to activator and desulfurization reaction tower recycles repeatedly, the utilization rate of desulfurizing agent can be greatly enhanced.But the recycle stock amount is crossed the energy consumption increase that conference causes desulfurizer.Because the mixed material water content that activator is discharged is big active high, recycle stock weight of the present invention can only be 50 to 200 times of desulfurizing agent weight, and the circulating ratio of common flue gas circulating fluidized bed desulfurization device generally is 200～500, so the dust content of separator inlet of the present invention only is 150～600g/Nm
3, and the dustiness of common flue gas circulating fluidized bed desulfurization device separator inlet is 600～1500g/Nm
3So energy consumption of the present invention is lower.
Shown in Fig. 1,2, device of the present invention mainly comprises desulfurization reaction tower 4, separator 8 and activator 3, it is characterized in that, activator 3 places between desulfurization reaction tower 4 and the separator 8, is connected with separator 8 with desulfurization reaction tower 4 respectively with mixed material tube connector 2 by recycle stock tube connector 6; Tumbler, desulfurizing agent and water inlet 7 that activator 3 comprises cylindrical shell 15, steel ball or rod iron 16, is made up of rotating shaft 18 and scraper plate 17, recycle stock tube connector 6, mixed material outlet 13.Steel ball or rod iron 16, tumbler, desulfurizing agent and the water inlet 7 formed by rotating shaft 18 and scraper plate 17, recycle stock tube connector 5, mixed material outlet 13.Desulfurizing agent and water inlet 7 can be arranged on the activator, and as adopting lime stone as desulfurizing agent, its import can be arranged on the boiler.
The dirty flue gas that contains sour gas and flying dust enters this desulfurizer from the gas approach 1 that is arranged on desulfurization reaction tower 4 bottoms, after the mixed material haptoreaction that flue gas comes out with activator 3 in desulfurization reaction tower 4, sour gas is wherein effectively removed, enter separator again and remove most solid particles, finally, cleaning flue gases is discharged by the exhanst gas outlet that is located on the separator.
In order further to improve the utilization rate of desulfurizing agent, desulfurization reaction tower can be designed to " П " shape, increase the time of staying of flue gas in desulfurization reaction tower 4.
3 pairs of desulfurizing agents of activator of the present invention have fragmentation, add the function of water digestion.It can adopt the gyratory crusher system, and promptly tumbler is made up of rotating shaft 18 and scraper plate 17, and cylindrical shell 15 then is actionless.Be contained in steel ball in the static cylindrical shell 15 or rod iron and rise along with the rotation of tumbler and fall, material is mixed and broken, material inlet and outlet be arranged in static drum shaft to both sides.Adopt this scheme, material inlet and outlet can link to each other with separator 8 with desulfurization reaction tower 4 well along drum shaft to multiple spot even arrange continuously, help mixed material flue gas haptoreaction equably in desulfurization reaction tower 4.
Claims (6)
1. material circulating flue gas desulfurization method is characterized in that:
A. the desulfurizing agent of initiate desulfurizing agent and the isolated non-complete reaction of separator and flying dust being sent into activator simultaneously as the water of recycle stock and injection fully is mixed into water content and is at least 5% mixed material;
B. mixed material fully contacts with sulfur in smoke after mixing, fragmentation and activation in activator and reacts, by separator it is separated from flue gas again, most of material wherein as recycle stock by repeatedly broken, activate and recycle.
2. method according to claim 1 is characterized in that: the mixed material after mixing, fragmentation, activation, its weight moisture capacity is 10%～20%.
3. method according to claim 1 is characterized in that, described desulfurizing agent can be calcium-based desulfurizing agent, flying dust or other alkaline matter, and desulfurizing agent can be to infeed with dry state or slurry condition.
4. method according to claim 1 is characterized in that, described recycle stock weight is 50 to 200 times of desulfurizing agent weight.
5. material cyclic activation flue gas desulfur device that adopts the described method of claim 1, comprise desulfurization reaction tower (4), separator (8) and activator (3), it is characterized in that, activator (3) places between desulfurization reaction tower (4) and the separator (8), is connected with separator (8) with desulfurization reaction tower (4) respectively with mixed material tube connector (2) by recycle stock tube connector (6); Tumbler, desulfurizing agent and water inlet (7) that activator (3) comprises cylindrical shell (15), steel ball or rod iron (16), is made up of rotating shaft (18) and scraper plate (17), recycle stock tube connector (6), mixed material outlet (13).
6. material cyclic activation flue gas desulfur device according to claim 5, it is characterized in that, described separator (8) can be electrostatic precipitator or sack cleaner, it also can be inertia or cyclone dust collectors assembly with electrostatic precipitator or sack cleaner, be equipped with flapper (10) and strength skewed slot (9) in the bottom of separator, strength skewed slot (9) links to each other with recycle stock tube connector (6), and end reaction material outlet (12) is placed at the bottom of separator (8) and desulfurization reaction tower (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141860 CN1575847A (en) | 2003-07-28 | 2003-07-28 | Material circulation activating flue gas desulfurization method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03141860 CN1575847A (en) | 2003-07-28 | 2003-07-28 | Material circulation activating flue gas desulfurization method and apparatus |
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| CN1575847A true CN1575847A (en) | 2005-02-09 |
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| CN 03141860 Pending CN1575847A (en) | 2003-07-28 | 2003-07-28 | Material circulation activating flue gas desulfurization method and apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460047C (en) * | 2006-12-01 | 2009-02-11 | 沙晓农 | Circulation fluidized bed dry method flue gas desulfur device |
| CN102179159A (en) * | 2011-04-06 | 2011-09-14 | 上海晓清环保科技有限公司 | Circulating material moistening and activating process for use in recirculating fluidized bed flue gas desulfurization |
| CN107051179A (en) * | 2017-06-15 | 2017-08-18 | 永兴县鸿福金属有限公司 | A kind of smelting exhaust ball milling intensified lime absorption process |
| CN107570000A (en) * | 2017-10-31 | 2018-01-12 | 苏州顺为环境科技有限公司 | Deacidifying dedusting device |
| CN109351173A (en) * | 2018-12-10 | 2019-02-19 | 福建龙净环保股份有限公司 | The online activation equipment of recirculating fluidized bed desulphurization system and its desulphurization circulating ash |
-
2003
- 2003-07-28 CN CN 03141860 patent/CN1575847A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460047C (en) * | 2006-12-01 | 2009-02-11 | 沙晓农 | Circulation fluidized bed dry method flue gas desulfur device |
| CN102179159A (en) * | 2011-04-06 | 2011-09-14 | 上海晓清环保科技有限公司 | Circulating material moistening and activating process for use in recirculating fluidized bed flue gas desulfurization |
| CN107051179A (en) * | 2017-06-15 | 2017-08-18 | 永兴县鸿福金属有限公司 | A kind of smelting exhaust ball milling intensified lime absorption process |
| CN107570000A (en) * | 2017-10-31 | 2018-01-12 | 苏州顺为环境科技有限公司 | Deacidifying dedusting device |
| CN107570000B (en) * | 2017-10-31 | 2024-06-21 | 苏州市淳然环境技术有限公司 | Deacidifying and dust removing device |
| CN109351173A (en) * | 2018-12-10 | 2019-02-19 | 福建龙净环保股份有限公司 | The online activation equipment of recirculating fluidized bed desulphurization system and its desulphurization circulating ash |
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