CN201692766U - Device for removing hazardous constituents from cement kiln flue gas by utilizing cross-flow moving bed - Google Patents
Device for removing hazardous constituents from cement kiln flue gas by utilizing cross-flow moving bed Download PDFInfo
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- CN201692766U CN201692766U CN2010201370785U CN201020137078U CN201692766U CN 201692766 U CN201692766 U CN 201692766U CN 2010201370785 U CN2010201370785 U CN 2010201370785U CN 201020137078 U CN201020137078 U CN 201020137078U CN 201692766 U CN201692766 U CN 201692766U
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- flow moving
- flue gas
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Abstract
A device for removing hazardous constituents from cement kiln flue gas by utilizing a cross-flow moving bed can effectively solve the problems of surface crusting and blockage caused by the circulated enrichment of the hazardous constituents such as alkali, chlorine, sulfur and the like, avoid the phenomenon that energy consumption is greatly increased because of evacuation, and isolate the hazardous constituents from the flue gas for recycle simultaneously. Adsorptive carrier particles (3) drop into the cross-flow moving bed absorber (5) through a feed hopper (1); high-temperature flue gas enters into the cross-flow moving bed absorber (5) and the low-temperature adsorptive carrier particles (3) and flows in a cross way, so that the harmful constituents in the flue gas are condensed on the adsorptive carrier particles (3); a blow-off valve (7) controls the material discharge speed of the adsorptive carrier particles (3); a cleaning device (9) can transmit the adsorptive carrier particles (3) to the feed hopper (1) after washing and drying the adsorptive carrier particles (3), so as to realize the cyclic utilization of the carrier particles. In addition, the supplying of the adsorptive carrier particles (3) is performed by a supply bin (10).
Description
Technical field
The utility model is a kind of apparatus and method of removing alkali, chlorine, sulphur in the clinker sintering process, belongs to the technical field of manufacture of cement.
Technical background
With suspension preheating and using predecomposition technology is that the New Type Dry-process Cement Production of core is the main flow technology of present cement industry development.But in the middle of the process that clinker is fired, because the again cohesions of harmful components in the suspended preheater system such as alkali, chlorine, sulphur, cause the harmful components content such as alkali, chlorine, sulphur in raw material and the fuel higher, be easy to cause cohering and stopping up of pre-heating system; Alkali content in the grog also often is higher than the kiln type of other type simultaneously, thereby influences the quality of clinker.
In the nsp kiln system, circulations such as alkali, chlorine, sulphur, enrichment are to be accompanied by two processes and to take place, and one is called " interior circulation ", and another cries " outer circulation ".Circulation is meant that alkali, chlorine, sulphur volatilize from raw material and fuel in the high temperate zone of kiln in so-called, when arriving suspension preheating part lower temperature region, be condensate at random on the lower raw material of temperature, along with raw material enter in the kiln together, form a circulation and an enrichment process between suspended preheater and kiln.And outer circulation is meant compositions such as the alkali that condenses in the raw material, chlorine, sulphur, does not discharge pre-heating system with being preheated the raw material that device collects, and is sent in the kiln existing cyclic process between preheater and these equipment again after being collected by dust collecting system.But because harmful components such as the alkali of taking away in the preheater waste gas, chlorine, sulphur are quite low, so general outer circulation is little to producing influence, if the kiln ash that dust-precipitator is collected abandons simultaneously, outer circulation can be eliminated substantially.
In multicomponent system, the minimum eutectic temperature of system generally reduces along with increasing of number of components.After harmful components such as contained alkali, chlorine, sulphur enter rotary kiln in the raw material, high temperate zone volatilization at kiln, be present in the kiln gas with gaseous form, kiln gas reduces gradually in temperature in the process of kiln tail motion, move in the pre-heating system condensation get off (about about 700 ℃), form multicomponent systems with other components such as raw material powder, its minimum eutectic temperature is reduced and form low temperature and melt body.Generally speaking, the minimum eutectic temperature of raw material is about 1250 ℃, and CaSO is pointed out in H.Ritzmann research
4, K
2SO
4And Na
2SO
4When existing jointly, minimum eutectic temperature may be lower than 800 ℃, and chlorination is arranged
When thing existed, minimum eutectic temperature can be near 700 ℃; The cognition of melting of harmful components formation comes at raw material or wadding surface spreading on the other hand, plays the effect of " adhesive ", when system temperature reduces, just forms skinning on the wadding surface, and then the phenomenon that results in blockage.
For the problem that skinning stops up and clinker quality descends that the circulation enrichment that solves because of harmful components such as alkali, chlorine, sulphur is caused, at present a lot of equipment have all adopted the bypass system.But the bypass system has not only increased capital expenditure, and increased grog and burnt till hear rate, studies show that, per 1% bypass amount increases heat consumption of clinker 15～21kJ/kgcl approximately, and generally the amount of leaking informaton all about 3%～10%, have in addition surpass 20%, directly increase heat consumption of clinker up to 7%, even can reach 14%, therefore be badly in need of the circulation enrichment problem that a kind of better method goes to solve harmful components such as alkali, chlorine, sulphur.
Summary of the invention
Technical problem: the utility model has proposed a kind of device that utilizes harmful components such as alkali, chlorine, sulphur in the cross-flow moving bed removal clinker sintering process flue gas at the skinning and the blockage problem that cause owing to harmful components circulation enrichments such as alkali, chlorine, sulphur in the cement production process.
Technical scheme: the utility model provides a kind of device that utilizes harmful components in the cross-flow moving bed removal clinker sintering process, this device comprises by cross-flow moving bed absorber, the carrier granular removal device, the carrier granular cleaning device, the series loop that the carrier granular feeder forms, cleaning device has two outlets, one of them outlet is connected with recovery bin, another outlet links to each other with the carrier granular loading hopper respectively with carrier granular supply storehouse, the bottom of cross-flow bed absorber links to each other with the carrier granular removal device, the outlet of carrier granular removal device bottom divides two-way, one the tunnel links to each other with the carrier granular cleaning device, another road direct connection carrier particle loading hopper, carrier granular loading hopper bottom is connected with the top inlet of cross-flow bed absorber through reinforced valve; Be respectively equipped with gas approach and exhanst gas outlet in the side of cross-flow moving bed absorber, be provided with deflector at cross-flow moving bed absorber middle part, be the absorption carrier particle in deflector, high-temperature flue gas flows out cross-flow moving bed absorber from exhanst gas outlet, returns preheating decomposition system.
The high-temperature flue gas of discharging by cement kiln cross-flow moving bed in after the enfleurage appendix body misorientation that from up to down moves contacts, harmful components such as alkali, chlorine, sulphur are condensate on the absorption carrier in the flue gas, and with an absorption carrier discharge bed body, the absorption carrier that has adsorbed harmful components such as alkali, chlorine, sulphur recycles after cleaning;
Absorption carrier is that thermal inertia is big, the inertia spheroid that wearability is good.
Beneficial effect: the utlity model has following characteristic and advantage:
1, the utility model has cut off the path of harmful components circulation enrichments such as alkali, chlorine, sulphur, has solved the skinning blockage problem that the circulation enrichment because of harmful components such as alkali, chlorine, sulphur is caused;
2, reduce grog and burnt till hear rate.This mode has been removed harmful components such as alkali, chlorine, sulphur in advance, stoped harmful components to condense on the lower raw material of temperature, therefore kiln gas directly can be purified by cross-flow moving bed absorber, do not need the bypass system, reduced hear rate, to the bypass system is installed, also can smoke evacuation purifies the back and realize that waste heat utilize again by cross-flow moving bed absorber;
3, adopt cross-flow moving bed main device, remove efficient height, simple structure as harmful components such as removal alkali, chlorine, sulphur;
4, owing to significantly reduced harmful components such as alkali, chlorine, sulphur in the clinker sintering procedure, can effectively improve the quality of clinker;
5, remove in the flue gas after the harmful components such as alkali, chlorine, sulphur, flue-gas temperature descends few, only produces small heat waste and crushing to purifying flue gas, does not influence the follow-up pre-thermal decomposition process of dirt material;
6, use production line of the present utility model, do not need the influence of worrying that harmful components circulation enrichments such as alkali, chlorine, sulphur are brought, so system can use high chlorine and high-sulfur raw material and high chlorine, high-sulfur coal, effectively improve system's raw material and coal adaptability.
7, construction cost is low, and system's floor space is little, and it is convenient to transform, and is little to former cement production system influence, applied range;
8, the absorption carrier that adopts of system is that thermal inertia is big, the inertia spheroid that wearability is good, and corundum ball for example, it has wear-resisting, and is high temperature resistant, and therefore the characteristics of acid-alkali-corrosive-resisting clean than being easier to, and cost is little, long service life;
9, in the past in the system, because the circulation enrichment of harmful components such as alkali, chlorine, sulphur, make low NO
XThe development of using predecomposition technology is restricted (under the reducing atmosphere condition, harmful components such as alkali, chlorine, sulphur skinning very easily take place stop up more for a long time), adopts the present invention, can actively promote low NO
XThe development of using predecomposition technology reduces NO
XDischarging reduces environmental pollution;
10, materials such as alkali, chlorine, sulphur can carry out resource and utilize after cleaning device is separated from system.
Description of drawings
Fig. 1 is a device schematic diagram of removing harmful components such as alkali, chlorine, sulphur in the clinker sintering process.
Have among the figure: carrier granular loading hopper 1, reinforced valve 2, absorption carrier 3, deflector 4, cross-flow moving bed absorber 5, exhanst gas outlet 6, carrier granular removal device 7, gas approach 8, carrier granular cleaning device 9, carrier granular supply storehouse 10, recovery bin 11, preheating decomposition system 12.
The specific embodiment
Its thinking is: the main device absorber adopts cross-flow moving bed structure, and high-temperature flue gas enters from smoke inlet 8, laterally evenly flows; (temperature is lower than K to absorption carrier 3
2SO
4, KCl, Na
2SO
4Deng the fusing point of alkali matter and sulfur-bearing chloride material, absorption carrier adopts thermal inertia big, the inertia spheroid that wearability is good, and as the corundum spheroid, particle diameter is chosen as 10～100mm) and slowly falls by cross-flow moving bed absorber 5 roof carrier particle charging valves 2 usually.High-temperature flue gas is by the absorption carrier bed time, harmful components such as steam-like alkali wherein, chlorine, sulphur condense to carrier particle surface, and and absorption carrier discharge cross-flow moving bed absorber 5 together, thereby reach the purpose of removing harmful components such as alkali, chlorine, sulphur in the cement sintering process.Below with reference to Fig. 1, specify the specific implementation of technology path of the present invention and target.
This device comprises by cross-flow moving bed absorber 5, carrier granular removal device 7, carrier granular cleaning device 9, the series loop that carrier granular feeder 1 forms, cleaning device 9 has two outlets, one of them outlet is connected with recovery bin 11, another outlet links to each other with carrier granular loading hopper 1 respectively with carrier granular supply storehouse 10, the bottom of cross-flow bed absorber 5 links to each other with carrier granular removal device 7, the outlet of carrier granular removal device 7 bottoms divides two-way, one the tunnel links to each other with carrier granular cleaning device 9, another road direct connection carrier particle loading hopper 1, carrier granular loading hopper 1 bottom is connected with the top inlet of cross-flow bed absorber 5 through reinforced valve 2; Be respectively equipped with gas approach 8 and exhanst gas outlet 6 in the side of cross-flow moving bed absorber 5, be provided with deflector 4 at cross-flow moving bed absorber 5 middle parts, it in deflector 4 absorption carrier particle 3, high-temperature flue gas enters from gas approach 8, through deflector 4 with after absorption carrier particle 3 contacts, flow out cross-flow moving bed absorber 5 from exhanst gas outlet 6, return preheating decomposition system 12.
High-temperature kiln gas enters from cross-flow moving bed absorber 5 smoke inlets 8, and the water conservancy diversion through deflector 4 laterally evenly flows to exhanst gas outlet 6, and turns back to preheating decomposition system 12.Absorption carrier 3 falls to bottom discharge valve 7 from cross-flow moving bed 5 top-feed buckets 1 with mild speed.Realize that with high-temperature flue gas misorientation flows in dropping process, harmful components such as the gaseous bases in the flue gas, chlorine, sulphur condense on the absorption carrier 3 in the gas-solid contact process and absorption carrier 3 is discharged cross-flow moving bed absorber 5 together.Blow-off valve 8 control discharge rates are steadily delivered to the supply belt with absorption carrier 3.Most of absorption carrier 3 directly is sent to cross-flow moving bed absorber 5 roof carrier particle loading hoppers 1 and is recycled after air suitably cools off, the fraction absorption carrier is admitted to cleaning device 9, after finishing washing and drying therein to absorption carrier, transmit by belt again and transport carrier granular loading hopper 1 to, the absorption carrier particle falls into cross-flow moving bed absorber 5 from loading hopper 1, realize the recycling of absorption carrier particle.The supply of finishing carrier granular 3 by carrier granular supply storehouse 10.Harmful components such as the alkali that separates in the cleaning device 9, chlorine, sulphur enter recovery bin 11, carry out resource and utilize.The present invention that Here it is removes the whole process flow of harmful components.
Claims (1)
1. device that utilizes harmful components in the cross-flow moving bed removal cement kiln flue gas, it is characterized in that this device comprises by cross-flow moving bed absorber (5), carrier granular removal device (7), carrier granular cleaning device (9), the series loop that carrier granular feeder (1) forms, cleaning device (9) has two outlets, one of them outlet is connected with recovery bin (11), another outlet links to each other with carrier granular loading hopper (1) respectively with carrier granular supply storehouse (10), the bottom of cross-flow bed absorber (5) links to each other with carrier granular removal device (7), the outlet of carrier granular removal device (7) bottom divides two-way, one the tunnel links to each other with carrier granular cleaning device (9), another road direct connection carrier particle loading hopper (1), carrier granular loading hopper (1) bottom is connected with the top inlet of cross-flow bed absorber (5) through reinforced valve (2); Be respectively equipped with gas approach (8) and exhanst gas outlet (6) in the side of cross-flow moving bed absorber (5), be provided with deflector (4) at cross-flow moving bed absorber (5) middle part, in deflector (4) absorption carrier particle (3), high-temperature flue gas enters from gas approach (8), through deflector (4) with after absorption carrier particle (3) contacts, flow out cross-flow moving bed absorber (5) from exhanst gas outlet (6), return preheating decomposition system (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201370785U CN201692766U (en) | 2010-03-19 | 2010-03-19 | Device for removing hazardous constituents from cement kiln flue gas by utilizing cross-flow moving bed |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201370785U CN201692766U (en) | 2010-03-19 | 2010-03-19 | Device for removing hazardous constituents from cement kiln flue gas by utilizing cross-flow moving bed |
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| CN201692766U true CN201692766U (en) | 2011-01-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101785953A (en) * | 2010-03-19 | 2010-07-28 | 东南大学 | Device and method for removing harmful components from gas in cement kiln by utilizing cross-flow moving bed |
| CN103949122A (en) * | 2014-04-25 | 2014-07-30 | 中冶华天工程技术有限公司 | Moving bed granular layer dust fog removing device |
| CN108421413A (en) * | 2018-02-28 | 2018-08-21 | 国家能源投资集团有限责任公司 | A kind of equipment for denitrifying flue gas and denitration method for flue gas |
| CN108516524A (en) * | 2018-02-28 | 2018-09-11 | 国家能源投资集团有限责任公司 | The cross-flow mobile device and method of sulphur are produced in sulfur dioxide serialization |
| CN109181786A (en) * | 2018-09-30 | 2019-01-11 | 胡自然 | A kind of coke oven gas desulfurization improved process |
| CN114345082A (en) * | 2021-12-31 | 2022-04-15 | 华东理工大学 | A remove bed processing apparatus for adsorbing contain organic volatile matter waste gas |
-
2010
- 2010-03-19 CN CN2010201370785U patent/CN201692766U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101785953A (en) * | 2010-03-19 | 2010-07-28 | 东南大学 | Device and method for removing harmful components from gas in cement kiln by utilizing cross-flow moving bed |
| CN101785953B (en) * | 2010-03-19 | 2012-02-22 | 东南大学 | Device and method for removing harmful components from gas in cement kiln by utilizing cross-flow moving bed |
| CN103949122A (en) * | 2014-04-25 | 2014-07-30 | 中冶华天工程技术有限公司 | Moving bed granular layer dust fog removing device |
| CN103949122B (en) * | 2014-04-25 | 2016-01-27 | 中冶华天工程技术有限公司 | Moving bed stratum granulosum dedusting day with fog |
| CN108421413A (en) * | 2018-02-28 | 2018-08-21 | 国家能源投资集团有限责任公司 | A kind of equipment for denitrifying flue gas and denitration method for flue gas |
| CN108516524A (en) * | 2018-02-28 | 2018-09-11 | 国家能源投资集团有限责任公司 | The cross-flow mobile device and method of sulphur are produced in sulfur dioxide serialization |
| CN108516524B (en) * | 2018-02-28 | 2020-06-02 | 国家能源投资集团有限责任公司 | Cross flow moving device and method for continuously preparing sulfur by sulfur dioxide |
| CN108421413B (en) * | 2018-02-28 | 2020-07-31 | 国家能源投资集团有限责任公司 | Flue gas denitration device and flue gas denitration method |
| CN109181786A (en) * | 2018-09-30 | 2019-01-11 | 胡自然 | A kind of coke oven gas desulfurization improved process |
| CN109181786B (en) * | 2018-09-30 | 2020-11-24 | 安徽金森源环保工程有限公司 | Improved process for coke oven gas desulfurization |
| CN114345082A (en) * | 2021-12-31 | 2022-04-15 | 华东理工大学 | A remove bed processing apparatus for adsorbing contain organic volatile matter waste gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110105 Effective date of abandoning: 20120222 |