CN104874288A - Kiln tail gas treatment method - Google Patents
Kiln tail gas treatment method Download PDFInfo
- Publication number
- CN104874288A CN104874288A CN201510258562.0A CN201510258562A CN104874288A CN 104874288 A CN104874288 A CN 104874288A CN 201510258562 A CN201510258562 A CN 201510258562A CN 104874288 A CN104874288 A CN 104874288A
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- treating method
- tail gas
- kiln
- kiln exhaust
- 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
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 239000000428 dust Substances 0.000 claims abstract description 9
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 8
- 230000023556 desulfurization Effects 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 35
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000001914 filtration Methods 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Landscapes
- Catalysts (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides a kiln tail gas treatment method and relates to the field of waste gas treatment. The method comprises the following steps: (1) cooling tail gas exhausted from a kiln, leading the tail gas into a reaction pool, adding a reduction agent and a catalyst, and performing denitrification treatment; (2) spraying an alkali liquid into the gas subjected to the treatment in the first step, and performing desulfurization treatment; and (3) performing dust collection on the gas subjected to the treatment in the second step and directly exhausting the purified gas. According to the method, the kiln tail gas can be effectively purified and treated and exhausted up to standard; the method has the efficient and energy-saving effects; the comprehensive effect is good and additional economic value is generated, and thus the function of saving energy and protecting the environment is realized.
Description
Technical field
The present invention relates to exhaust-gas treatment field, be specifically related to a kind of kiln exhaust gas treating method.
Background technology
In the industry of China, kiln exist with a lot of factory among.But the use of kiln causes the discharge of a large amount of tail gas, these tail gas have become the important source of the one of atmosphere pollution.Comprise a large amount of sulfide in these tail gas, nitrogen oxide, these harmful tail gas can cause significant impact to natural environment, cause the natural calamity of acid rain, and affect the physical and mental health of natural environment and the mankind.
Process now for tail gas has multiple way, but a lot of method is all have very high cost, treatment effeciency is not high yet, there is a lot of technology can only to a certain pollutant process, resultant effect is poor, therefore, is badly in need of now a kind of resultant effect good, administer less expensive, energy-efficient kiln exhaust gas treating method.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of kiln exhaust gas treating method, make resultant effect good, administer less expensive, energy-efficient.
In order to solve above technology for topic, the present invention is achieved by the following technical programs:
A kind of kiln exhaust gas treating method, comprises the steps:
The first step, the tail gas cooling of being discharged by kiln to be passed in reaction tank and to add reducing agent and catalyst carries out out of stock process;
Second step, sprays alkali lye and carries out desulfurization process in the gas of first step process;
3rd step, carry out dust removal process to the gas of second step process, purified gas is directly discharged.
More specifically: the first step is that tail gas is down to 315 DEG C ~ 400 DEG C and is passed in reaction tank and processes.Reducing agent wherein comprises ammonia and urea, and catalyst is with TiO
2for carrier,
With V
2o
5or V
2o
5-WO
3or V
2o
5-MoO
3for active component, make the additive with honeycomb fashion, board-like or ripple struction.Second step carries out in spray column.Alkali lye is dissolved in water is made by lime stone, calcium hydroxide.3rd step completes dust removal process by filter mantle.
The invention provides a kind of processing method of kiln tail gas, can be good at processing nitrogen oxide in tail gas and sulfide and dust by the dust removal process of the out of stock process of the first step, the desulfurization process of second step and the 3rd step, so resultant effect is relatively good, process nitrogen oxide of the present invention and sulfide have high efficiency, and do not need to provide stricter reaction environment, energy-efficient, various additive and low in raw material price, vent gas treatment cost is lower, and have additional sediment gypsum, gypsum is a kind of construction material, creates added economic value.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of kiln exhaust gas treating method of the present invention.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
embodiment 1:
The tail gas that kiln is discharged is down to 350 DEG C, and be passed in reaction tank, the solution in reaction tank is by ammoniacal liquor with TiO
2for carrier, with V
2o
5or V
2o
5-WO
3or V
2o
5-MoO
3for active component, make corrugated catalyst composition, in reaction tank, carry out out of stock process.Gas after process is passed in spray column and then sprays alkali lye, and alkali lye is dissolved in water by lime stone to make, and carries out desulfurization process, obtain gypsum precipitate in spray column.Gas after desulfurization process is discharged in filter mantle, dust removal by filtration, and the gas after filtration can directly be discharged in air.
embodiment 2:
The tail gas that kiln is discharged is down to 380 DEG C, and be passed in reaction tank, the solution in reaction tank is by urea with TiO
2for carrier, with V
2o
5or V
2o
5-WO
3or V
2o
5-MoO
3for active component, make the catalyst composition of honeycomb fashion, in reaction tank, carry out out of stock process.Gas after process is passed in spray column and then sprays alkali lye, and alkali lye is dissolved in water by calcium hydroxide to make, and carries out desulfurization process, obtain gypsum precipitate in spray column.Gas after desulfurization process is discharged in filter mantle, dust removal by filtration, and the gas after filtration can directly be discharged in air.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a kiln exhaust gas treating method, is characterized in that, comprises the steps:
The first step, the tail gas cooling of being discharged by kiln to be passed in reaction tank and to add reducing agent and catalyst carries out out of stock process;
Second step, sprays alkali lye and carries out desulfurization process in the gas of first step process;
3rd step, carry out dust removal process to the gas of second step process, purified gas is directly discharged.
2. kiln exhaust gas treating method as claimed in claim 1, is characterized in that, the tail gas cooling in the described first step is down to 315 DEG C ~ 400 DEG C.
3. kiln exhaust gas treating method as claimed in claim 1, it is characterized in that, described reducing agent comprises ammonia and urea.
4. kiln exhaust gas treating method as claimed in claim 1, it is characterized in that, described catalyst is with TiO
2for carrier, with V
2o
5or V
2o
5-WO
3or V
2o
5-MoO
3for active component, make the additive with honeycomb fashion, board-like or ripple struction.
5. kiln exhaust gas treating method as claimed in claim 1, it is characterized in that, described second step carries out in spray column.
6. kiln exhaust gas treating method as claimed in claim 1, it is characterized in that, described alkali lye is dissolved in water is made by lime stone, calcium hydroxide.
7. kiln exhaust gas treating method as claimed in claim 1, it is characterized in that, described 3rd step completes dust removal process by filter mantle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258562.0A CN104874288A (en) | 2015-07-01 | 2015-07-01 | Kiln tail gas treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258562.0A CN104874288A (en) | 2015-07-01 | 2015-07-01 | Kiln tail gas treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104874288A true CN104874288A (en) | 2015-09-02 |
Family
ID=53942121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510258562.0A Pending CN104874288A (en) | 2015-07-01 | 2015-07-01 | Kiln tail gas treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104874288A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097010A (en) * | 2017-12-08 | 2018-06-01 | 亿利洁能科技（颍上）有限公司 | A kind of method of coal desulfurization denitration |
| CN113631804A (en) * | 2019-03-07 | 2021-11-09 | 中国电力株式会社 | Combustion System |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6361754B1 (en) * | 1997-03-27 | 2002-03-26 | Clean Diesel Technologies, Inc. | Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction |
| US20050214187A1 (en) * | 2002-10-01 | 2005-09-29 | Airborne Industrial Minerals, Inc. | Removal of Hg, NOx, and SOx with using oxidants and staged gas/liquid contact |
| CN1824372A (en) * | 2006-01-23 | 2006-08-30 | 华东理工大学 | Simultaneous desulfurization and denitrification purification method of microwave catalytic flue gas |
| CN101745305A (en) * | 2010-01-24 | 2010-06-23 | 华北电力大学（保定） | Method for removing various gaseous pollutants from smoke gas |
-
2015
- 2015-07-01 CN CN201510258562.0A patent/CN104874288A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6361754B1 (en) * | 1997-03-27 | 2002-03-26 | Clean Diesel Technologies, Inc. | Reducing no emissions from an engine by on-demand generation of ammonia for selective catalytic reduction |
| US20050214187A1 (en) * | 2002-10-01 | 2005-09-29 | Airborne Industrial Minerals, Inc. | Removal of Hg, NOx, and SOx with using oxidants and staged gas/liquid contact |
| CN1824372A (en) * | 2006-01-23 | 2006-08-30 | 华东理工大学 | Simultaneous desulfurization and denitrification purification method of microwave catalytic flue gas |
| CN101745305A (en) * | 2010-01-24 | 2010-06-23 | 华北电力大学（保定） | Method for removing various gaseous pollutants from smoke gas |
Non-Patent Citations (3)
| Title |
|---|
| 丁明 等: "玻璃窑炉烟气脱硝脱硫除尘一体化技术", 《玻璃》 * |
| 孙献斌 编著: "《清洁煤发电技术》", 28 February 2014 * |
| 毛志伟 程群 编著: "《氮氧化物减排》", 31 August 2014 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097010A (en) * | 2017-12-08 | 2018-06-01 | 亿利洁能科技（颍上）有限公司 | A kind of method of coal desulfurization denitration |
| CN113631804A (en) * | 2019-03-07 | 2021-11-09 | 中国电力株式会社 | Combustion System |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate 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: 20150902 |