CN102824826A - Comprehensive treatment method and device for coke oven flue gas pollutants - Google Patents
Comprehensive treatment method and device for coke oven flue gas pollutants Download PDFInfo
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- CN102824826A CN102824826A CN201210313575XA CN201210313575A CN102824826A CN 102824826 A CN102824826 A CN 102824826A CN 201210313575X A CN201210313575X A CN 201210313575XA CN 201210313575 A CN201210313575 A CN 201210313575A CN 102824826 A CN102824826 A CN 102824826A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to a comprehensive treatment method and device for removing SOx, NOx and other pollutants from coke oven flue gas. Harmful substances such as SOx and/or NOx, HCl, HF, mercury and the like in flue gas are removed basically. The method comprises the following steps of: fully mixing combustion flue gas with NH3, and making the mixed gas flow through a pollutant adsorption device provided with an adsorbent material layer from bottom to top; adsorbing SOx and/or NOx, HCl, HF and mercury in the flue gas into a porous system of an adsorbent, and exhausting clean flue gas from the upper part of the adsorption device; and replenishing a fresh adsorbent into the adsorption device from the top of the adsorption device, exhausting the adsorption-saturated adsorbent out of the adsorption device from the bottom of the adsorption device, resolving and regenerating the saturated adsorbent, and returning into the adsorption device for recycling.
Description
Technical field
The present invention relates to coke oven flue gas pollutant control field, more particularly, relate to a kind of SO that removes to coke oven flue gas
x, No
xAnd the cost-effective process and the device of other pollutant.
Background technology
Coke oven flue gas contains SO
2, SO
3, NO
x, pollutants such as heavy metal such as mercury, atmosphere is polluted, effectively do not administered so far.
Traditional flue gas desulfurization and denitration technique is developed to boiler smoke, and cost-effective operation interval is 100 ~ 150 ℃ (denitration is 300 ~ 400 ℃), SO
2Concentration 1000 ~ 4000mg/Nm
3Scope.To the coke oven flue gas characteristic, at SO
2Concentration 100 ~ 250mg/Nm
3The interval, traditional flue gas desulfurization technique loses economy; In the interval of flue-gas temperature below 110 ~ 170 ℃, traditional flue-gas denitration process loses validity, must be with could operate as normal more than the flue gas heating to 300 ℃.
Summary of the invention
The purpose of this invention is to provide a kind of can adapt to the coke oven flue gas characteristic, at 100 ~ 150 ℃ of flue-gas temperatures, SO
2Concentration 100 ~ 250mg/Nm
3The desulphurization denitration of interval interior economical and effective work takes off and the smoke comprehensive of other pollutant is administered technology.
The objective of the invention is to realize like this: a kind of coke oven flue gas pollutant comprehensive processing method, utilize adsorbent that the pollutant in the flue gas is adsorbed, it may further comprise the steps:
-the flue gas that will contain pollutant mixes with NH3, is used for the NOx of pollutant is changed into N2 and H2O, SOx is changed into sulfate, sulphite.
-the flue gas that mixes with NH3 with uniformly, the flow velocity confirmed, the adsorbent bed of material of flowing through from bottom to top, the adsorbent bed of material with uniformly, the speed confirmed flows downward, and does reverse the contact with the flue gas that flows from bottom to top.Under the situation that adsorbent is participated in, NOx in the pollutant and NH
3Change into N
2And H
2O, SOx and NH
3Change into sulfate, sulphite.Wherein NOx and NH
3The N that changes into
2And H
2O gets into flue gas, SOx and NH
3Thereby the sulfate that changes into, sulphite are adsorbed the porous system absorption of agent and from flue gas, remove, and remove from flue gas thereby heavy metal also is adsorbed the porous system absorption of agent.
The clean flue gas that-pollutant is removed is left the said pollutant absorption bed of material, is discharged in the atmosphere.
-adsorbent is distributed as the bed of material of confirming thickness uniformly in the pollutant absorption bed of material; On short transverse; The saturation degree of adsorbent forms definite concentration gradient, when the adsorbent of bed of material foot reaches capacity, the adsorbent of bed of material bottom is discharged the said pollutant absorption bed of material; Said adsorbent is adjusted to definite amount for the adsorbance of the NOx in the pollutant, SOx or other pollutant through the adsorbent discharge rate.
-will leave the adsorbent pollutant absorption bed of material, that absorption reaches capacity; Resolve regeneration; Utilize heat that adsorbent rich contaminant gases is parsed, make adsorbent obtain regeneration, and be sent to the pollutant absorption bed of material to be recycled;
-resolve the rich contaminant gases that obtains to be discharged to acid making system, the SOx in the rich pollutant is processed sulfuric acid, or get into the coke oven by-product gas.
Further, said adsorbent is limited in the weight of discharging by said adsorbent to the adsorptive value of sulphite is 5% to the maximum, be preferably 3%.
Further, the material of said adsorbent is an activated coke, or active carbon, perhaps other any loose porous material.
Further, said adsorbent is the suitable size that flows and collect, and granularity is 1-20mm, preferred 3-10mm.
Further, the NH3 that is used for mixing with flue gas is ammonia, the air mixture of volumetric concentration below 5%.
The present invention also comprises a kind of coke oven flue gas pollutant Integrated Processing Unit, and it comprises pollutant adsorbent equipment, chimney, parsing reclaim equiment, adsorbent transloading equipment.The pollutant adsorbent equipment is provided with flue gas and mixes ammonia unit, the adsorbent bed of material, flue gas distribution system, cloth system, material-receiving system in it.
The invention solves pollutant technologies such as traditional flue gas desulfurization and denitrification and can not adapt to the difficult problem of coke oven flue gas characteristic, and can also carry out cost-effective removing other pollutants such as heavy metal of full concentration range.
Description of drawings
Fig. 1 is a process chart of the present invention,
Fig. 2 is a pollutant adsorbent equipment sketch map of the present invention,
Fig. 3 is the process chart of a kind of specific embodiments of the present invention.
The specific embodiment
Like Fig. 1, shown in Figure 2, technology capital equipment of the present invention comprises: carbonization chamber 11, combustion chamber 12, pollutant adsorbent equipment 13, chimney 14, parsing reclaim equiment 15, adsorbent transloading equipment 16.
Coke oven is spaced by carbonization chamber 11, combustion chamber 12 successively; Coal gas burns in combustion chamber 12; Conducting heat through dividing wall type is 11 heat supplies of carbonization chamber, and coal for coking secluding air destructive distillation in carbonization chamber 11 becoming coke, the flue gas that gas-fired produces be 12 discharges from the combustion chamber.
Pollutant adsorbent equipment 13 of the present invention contacts with adsorbent to accomplish the device of adsorption process for holding adsorbent and satisfying flue gas; Its primary structure comprises: flue gas mixes ammonia unit 21, lower gas distribution facilities 22, adsorbent cloth facility 24, adsorbent rewinding facility 25, adsorbent exhausting equipment 26, and is as shown in Figure 2.
Said flue gas mixes ammonia unit 21 and is arranged on before the adsorbent bed of material, and described flue gas mixes in the ammonia unit has the facility that makes ammonia evenly spray, mix; Said distribution of gas facility 22 is arranged under the adsorbent bed of material, can make to contain flue gas SO2, SO3, NOx, heavy metal or similar contaminant, that mix with ammonia with the flow velocity of confirming the uniformly adsorbent bed of material of flowing through; Said adsorbent cloth facility 24 is arranged on the adsorbent bed of material, and the adsorbent that gets into from said pollutant adsorbent equipment 13 tops is evenly distributed.Said distribution of gas facility 22 can be mutual independently different facility with said adsorbent rewinding facility 24, also can be that same set of facility is realized 2 kinds of different functions simultaneously.
Said adsorbent rewinding facility is provided with 25 under the adsorbent bed of material, makes the adsorbent of adsorbent material layer lower part described in the said pollutant adsorbent equipment 13 leave corresponding device to confirm uniform quantity; Said adsorbent exhausting equipment 26 is arranged under the rewinding facility, makes the amount of the adsorbent of discharging in the said pollutant adsorbent equipment 13 satisfy the value of confirming, this value also can be regulated in the scope of confirming.
The flue gas of 12 discharges gets into pollutant adsorbent equipment 13 with flow velocity uniform, that confirm from pollutant adsorbent equipment 13 belows from the combustion chamber, bottom-up flowing.The pollutant adsorbent equipment can be carbon steel, steel alloy or other any material, and it is cube, cylinder or other arbitrary shape; It has one or more gas approach, one or more exhanst gas outlet, one or more adsorbent import, the outlet of one or more adsorbent.In described pollutant adsorbent equipment, the absorption flue gas pollutant uses the identical adsorbent bed of material, or uses the different adsorption agent bed of material respectively.
Flue gas mixed ammonia unit 21 before the adsorbent bed of material, and the flue gas of entering pollutant adsorbent equipment 13 is the mixed ammonia unit 21 through establishing in the pollutant adsorbent equipment 13 at first, mixes with NH3.As shown in Figure 2, the flue gas that pollutant adsorbent equipment of the present invention comprises mixes ammonia unit 21, can be arranged on inside (as shown in Figure 1), also can be arranged on pollutant adsorbent equipment outside (as shown in Figure 2).Flue gas mixes the ammonia unit and can be positioned at before the desulphurization denitration adsorbent bed of material, or the mixed ammonia unit of flue gas is positioned at before the denitration adsorbent bed of material.The NH3 that is used for mixing with flue gas is ammonia, the air mixture of volumetric concentration below 5%.
Flue gas behind overmulling ammonia; Through the distribution of gas facility 22 under the adsorbent bed of material; With the bottom-up adsorbent bed of material of flowing through of flow velocity uniform, that confirm, the adsorbent bed of material flows downward with speed uniform, that confirm, does reverse the contact with the flue gas that flows from bottom to top.Under the situation that adsorbent is participated in, NOx in the pollutant and NH
3Change into N
2And H
2O, SOx and NH
3Change into sulfate, sulphite.Wherein NOx and NH
3The N that changes into
2And H
2O gets into flue gas, SOx and NH
3Thereby the sulfate that changes into, sulphite are adsorbed the porous system absorption of agent and from flue gas, remove, and remove from flue gas thereby heavy metal also is adsorbed the porous system absorption of agent.SO in the flue gas of the pollutant adsorbent equipment adsorbent bed of material like this flows through
2, SO
3, NO
x, pollutant such as heavy metal adsorbed by the bed of material, clean flue gas is left bed of material surface 23, leaves the pollutant adsorbent equipment through exhanst gas outlet, is discharged in the atmosphere through chimney 14.
Described adsorbent is the charcoal base adsorbent of activated coke or active carbon or similar material, or any loose porous granular material of material, arbitrary shape, arbitrary dimension, utilizes its loose porous characteristic to realize the absorption to pollutant.Adsorbent cloth facility is arranged on the said adsorbent bed of material, the adsorbent that gets into from said device top is evenly distributed.Described adsorbent contain can with the composition of pollutant generation chemical reaction, accomplish chemisorbed with the mode of anti-biochemical reaction.Adsorbent is the suitable size that flows and collect, and granularity is 1-20mm, preferred 3-10mm.
The adsorbent that absorption reaches capacity in the pollutant adsorbent equipment is discharged through the adsorbent outlet, and fresh adsorbent is provided by import into through adsorbent, makes adsorbent in the pollutant absorption bed of material, be distributed as the bed of material of confirming thickness uniformly.On short transverse; The saturation degree of adsorbent forms definite concentration gradient; When the adsorbent of monitoring bed of material foot reaches capacity, bed of material bottom is confirmed that the adsorbent in the altitude range passes through the adsorbent rewinding facility 25 of material layer lower part, discharges said pollutant adsorbent equipment.Adsorbent rewinding facility is arranged under the adsorbent bed of material, and adsorbent that can the adsorbent material layer lower part leaves the pollutant adsorbent equipment to confirm uniform quantity.
Said adsorbent is for the adsorbance of the NOx in the pollutant, SOx or other pollutant; Adsorbent exhausting equipment 26 is adjusted to definite amount under the rewinding facility through being arranged on; Make the amount of the adsorbent of being discharged satisfy the value of confirming, this value also can be regulated in the scope of confirming.With the adsorbent of said pollutant adsorbent equipment to SOx and NH
3The weight that the adsorptive value of the sulphite that changes into is limited in the adsorbent of discharging by said adsorbent exhausting equipment is 5% to the maximum, is preferably 3%.
The pollutant adsorbent equipment can be worked in positive pressure environment, also can in subnormal ambient, work.Different specific embodiments can be done different processing, but all should regard scope of the present invention as.
After the adsorbent that absorption reaches capacity in the pollutant adsorbent equipment leaves the pollutant adsorbent equipment, in transloading equipment 16 is transported to parsing reclaim equiment 15.Resolve reclaim equiment 15 and adopt pyrolysis to analyse mode, utilize heat that adsorbent pollutant is parsed, make adsorbent obtain activating and regenerating, realize recycle.Resolving reclaim equiment can be separate equipment, also can utilize coke oven originally to hold and make the parsing reclaim equiment.Described parsing reclaim equiment can be direct Analytic Tower, also can be indirect Analytic Tower.
The thermal source of resolving the reclaim equiment use can be forms such as high-temperature gas, high-temp liquid, electrical heating, and different specific embodiments can be done different processing, but all should regard scope of the present invention as.
The rich contaminant gases that parsing obtains also can be sent to special after-treatment system.After-treatment system generally is an acid making system, with SO
xProcess sulfuric acid.Different specific embodiments can be done different processing, but all should regard scope of the present invention as.
Shown in Figure 3 is an alternative embodiment of the invention.Wherein parsing reclaim equiment 15 can be served as in one of part of coke oven itself carbonization chamber 11.The rich contaminant gases that parsing obtains is admitted to the raw coke oven gas pipeline, gets into original gas purification workshop section of burnt factory with raw coke oven gas.
The above only is a preferred implementation of the present invention; Should be pointed out that technical staff, under the prerequisite that does not break away from know-why of the present invention for the present technique field; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (14)
1. a coke oven flue gas pollutant comprehensive processing method utilizes adsorbent that the pollutant in the flue gas is adsorbed, and it is characterized in that may further comprise the steps:
-the flue gas that will contain pollutant mixes with NH3, is used for the NOx of pollutant is changed into N2 and H2O, SOx is changed into sulfate, sulphite;
-the flue gas that mixes with NH3 with uniformly, the flow velocity confirmed, the adsorbent bed of material of flowing through from bottom to top, the adsorbent bed of material with uniformly, the speed confirmed flows downward, and does reverse the contact with the flue gas that flows from bottom to top; Under the situation that adsorbent is participated in, NOx in the pollutant and NH
3Change into N
2And H
2O, SOx and NH
3Change into sulfate, sulphite; Wherein NOx and NH
3The N that changes into
2And H
2O gets into flue gas, SOx and NH
3Thereby the sulfate that changes into, sulphite are adsorbed the porous system absorption of agent and from flue gas, remove, and remove from flue gas thereby heavy metal also is adsorbed the porous system absorption of agent;
The clean flue gas that-pollutant is removed is left the said pollutant absorption bed of material, is discharged in the atmosphere;
-adsorbent is distributed as the bed of material of confirming thickness uniformly in the pollutant absorption bed of material; On short transverse; The saturation degree of adsorbent forms definite concentration gradient, when the adsorbent of bed of material foot reaches capacity, the adsorbent of bed of material bottom is discharged the said pollutant absorption bed of material; Said adsorbent is adjusted to definite amount for the adsorbance of the NOx in the pollutant, SOx or other pollutant through the adsorbent discharge rate;
-will leave the adsorbent pollutant absorption bed of material, that absorption reaches capacity, resolve regeneration, utilize heat that adsorbent rich contaminant gases is parsed, make adsorbent obtain regeneration, and be sent to the pollutant absorption bed of material to be recycled;
-resolve the rich contaminant gases that obtains to be discharged to acid making system, the SOx in the rich pollutant is processed sulfuric acid, or get into the coke oven by-product gas.
2. the method for claim 1 is characterized in that, said adsorbent is limited in the weight of discharging by said adsorbent to the adsorptive value of sulphite and is 5% to the maximum, is preferably 3%.
3. claim 1,2 method is characterized in that the material of said adsorbent is an activated coke, or active carbon, perhaps other any loose porous material.
4. claim 1,2 or 3 method is characterized in that, said adsorbent is the suitable size that flows and collect, and granularity is 1-20mm, preferred 3-10mm.
5. the method for claim 1 is characterized in that, said NH3 is ammonia, the air mixture of volumetric concentration below 5%.
6. coke oven flue gas pollutant comprehensive treatment device; Said device is used in particular for implementing the method for claim 1 ~ 5; It is characterized in that: comprise pollutant adsorbent equipment (13), chimney (14), resolve reclaim equiment (15), adsorbent transloading equipment (16); Pollutant adsorbent equipment (13) links to each other with parsing reclaim equiment (15) through adsorbent transloading equipment (16), and chimney (14) links to each other with pollutant adsorbent equipment (13); Wherein, the pollutant adsorbent equipment comprises that flue gas mixes ammonia unit (21), distribution of gas facility (22), adsorbent cloth facility (24), adsorbent rewinding facility (25), adsorbent exhausting equipment (26).
7. the described comprehensive treatment device of claim 6 is characterized in that, in said pollutant adsorbent equipment (13),
Said flue gas mixes ammonia unit (21) and is arranged on before the adsorbent bed of material, and described flue gas mixes in the ammonia unit has the facility that makes ammonia evenly spray, mix;
Said distribution of gas facility (22) is arranged under the adsorbent bed of material, can make to contain flue gas SO2, SO3, NOx, heavy metal or similar contaminant, that mix with ammonia with the flow velocity of confirming the uniformly adsorbent bed of material of flowing through;
-said adsorbent cloth facility (24) is arranged on the adsorbent bed of material, and the adsorbent that gets into from said pollutant adsorbent equipment (13) top is evenly distributed;
-said adsorbent rewinding facility is provided with (25) under the adsorbent bed of material, makes the adsorbent of adsorbent material layer lower part described in the said pollutant adsorbent equipment (13) leave corresponding device to confirm uniform quantity;
-said adsorbent exhausting equipment (26) is arranged under the rewinding facility, makes the amount of the adsorbent of discharging in the said pollutant adsorbent equipment (13) satisfy the value of confirming, this value also can be regulated in the scope of confirming.
8. the described comprehensive treatment device of claim 6 is characterized in that, said pollutant adsorbent equipment has one or more gas approach, one or more exhanst gas outlet, one or more adsorbent import, the outlet of one or more adsorbent; Described pollutant adsorbent equipment can be carbon steel, steel alloy or other any material, and it is cube, cylinder or other arbitrary shape.
9. the described comprehensive treatment device of claim 6 is characterized in that, in described pollutant adsorbent equipment, the absorption flue gas pollutant uses the identical adsorbent bed of material, or uses the different adsorption agent bed of material respectively.
10. claim 6 and 7 described comprehensive treatment devices is characterized in that, flue gas mixes the ammonia unit and is positioned at before the desulphurization denitration adsorbent bed of material, or the mixed ammonia unit of flue gas is positioned at before the denitration adsorbent bed of material.
11. the described comprehensive treatment device of claim 6 is characterized in that, said distribution of gas facility can be mutual independently different facility with said adsorbent rewinding facility, also can be that same set of facility is realized 2 kinds of different functions simultaneously.
12. the described comprehensive treatment device of claim 6 is characterized in that, described parsing reclaim equiment utilizes heat that adsorbent pollutant is parsed, and makes adsorbent obtain activating and regenerating; Described parsing reclaim equiment can be a separate equipment, also can utilize coke oven originally to hold and make the parsing reclaim equiment.
13. claim 6,12 described comprehensive treatment devices is characterized in that described parsing reclaim equiment is Analytic Tower directly, also can be indirect Analytic Towers.
14. the described comprehensive treatment device of claim 6 is characterized in that, described adsorbent transporter is belt conveyor, bucket elevator, chain bucket conveyer, corrugated sidewall conveyer, manpower mode, or their combination in any.
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|---|---|---|---|
| CN201210313575XA CN102824826A (en) | 2012-08-30 | 2012-08-30 | Comprehensive treatment method and device for coke oven flue gas pollutants |
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|---|---|---|---|
| CN201210313575XA CN102824826A (en) | 2012-08-30 | 2012-08-30 | Comprehensive treatment method and device for coke oven flue gas pollutants |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923046A (en) * | 2015-05-20 | 2015-09-23 | 江苏新世纪江南环保股份有限公司 | Coke oven flue gas desulfurization, denitration and waste heat recovery integrated method |
| CN107961770A (en) * | 2018-01-02 | 2018-04-27 | 中国科学院过程工程研究所 | The regenerative system and renovation process of adsorbent in a kind of cock-oven gas purifying |
| CN112403192A (en) * | 2020-10-29 | 2021-02-26 | 攀枝花市蓝鼎环保科技有限公司 | Sintering flue gas treatment device capable of simultaneously performing desulfurization and denitrification |
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| CN102580455A (en) * | 2011-12-29 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Sintering smoke treatment system and sintering smoke treatment method |
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| CN101310827A (en) * | 2008-02-22 | 2008-11-26 | 张开元 | Activated charcoal gas cleaning method and device thereof |
| CN102580455A (en) * | 2011-12-29 | 2012-07-18 | 山西太钢不锈钢股份有限公司 | Sintering smoke treatment system and sintering smoke treatment method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923046A (en) * | 2015-05-20 | 2015-09-23 | 江苏新世纪江南环保股份有限公司 | Coke oven flue gas desulfurization, denitration and waste heat recovery integrated method |
| CN107961770A (en) * | 2018-01-02 | 2018-04-27 | 中国科学院过程工程研究所 | The regenerative system and renovation process of adsorbent in a kind of cock-oven gas purifying |
| WO2019134270A1 (en) * | 2018-01-02 | 2019-07-11 | 中国科学院过程工程研究所 | Regeneration system and regeneration method for adsorbent in coke oven flue gas purification |
| CN107961770B (en) * | 2018-01-02 | 2020-02-14 | 中国科学院过程工程研究所 | Regeneration system and regeneration method of adsorbent in coke oven flue gas purification |
| CN112403192A (en) * | 2020-10-29 | 2021-02-26 | 攀枝花市蓝鼎环保科技有限公司 | Sintering flue gas treatment device capable of simultaneously performing desulfurization and denitrification |
| CN112403192B (en) * | 2020-10-29 | 2022-07-26 | 攀枝花市蓝鼎环保科技有限公司 | Sintering flue gas treatment device capable of simultaneously performing desulfurization and denitrification |
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Application publication date: 20121219 |