CN210097394U - Be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination - Google Patents
Be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination Download PDFInfo
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- CN210097394U CN210097394U CN201920764623.4U CN201920764623U CN210097394U CN 210097394 U CN210097394 U CN 210097394U CN 201920764623 U CN201920764623 U CN 201920764623U CN 210097394 U CN210097394 U CN 210097394U
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- flue gas
- ammonia
- dust
- cement kiln
- denitration
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- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000003546 flue gas Substances 0.000 title claims abstract description 46
- 239000000428 dust Substances 0.000 title claims abstract description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000003795 desorption Methods 0.000 title abstract description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 28
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- 239000002918 waste heat Substances 0.000 claims abstract description 12
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 13
- 239000012895 dilution Substances 0.000 claims description 8
- 238000010790 dilution Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 239000003500 flue dust Substances 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination, include dust removal denitration integration reactor and spout ammonia system. The utility model has the advantages that: the system can cooperatively remove various pollutants such as flue gas, dust, nitrogen oxides and the like, has simple system and small occupied area, greatly reduces the investment and operation cost, and improves the economy; the system is stable and reliable in operation, the pollutant removal efficiency is high, particularly in the cement industry, the flue gas and dust concentration is high, a denitration catalyst is easy to be poisoned and blocked, and the denitration efficiency of the method has obvious advantages under the condition that the SCR technology is limited; the system is reasonably arranged, the temperature of the flue gas from the cement kiln tail air preheater to the waste heat boiler is just in an effective temperature range of the SCR catalyst, the performance of the catalyst can be fully exerted, and the accumulated dust of the waste heat boiler can be relieved after the flue gas is deeply dedusted, so that the efficiency of the waste heat boiler is improved.
Description
Technical Field
The utility model relates to an atmosphere pollution control technical field, more specifically say, it relates to a be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination.
Background
At present, nitrogen oxides and dust in tail flue gas of a cement kiln are required to be treated separately, the denitration mainly adopts an SNCR technology, the dust removal adopts a cloth bag or an electric dust removal technology and the like, so that a cement kiln tail flue gas pollutant removal system is complex, the equipment has wide occupied area, large flue gas resistance, high investment and running cost, large enterprise burden and poor economical efficiency, the SNCR denitration efficiency is limited, the deep removal of the nitrogen oxides cannot be realized, and the ultra-low emission of the flue gas of the cement industry which can be implemented in the future is difficult to deal with.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the aforesaid not enough, provide a pollutant desorption is efficient, and the system is simple, and the operation is reliable and stable, and equipment area is little is used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination.
The system for cooperatively removing the nitrogen oxides in the tail flue gas dust of the cement kiln comprises a dust removal and denitration integrated reactor and an ammonia spraying system; the dedusting and denitration integrated reactor sequentially comprises an inlet channel, an ash hopper, an aluminum silicate fiber composite filter cylinder, a back flushing system and an outlet channel from bottom to top; a denitration catalyst is embedded in the aluminum silicate fiber composite filter cylinder; the ammonia spraying system comprises a dilution fan, an ammonia gas source, an ammonia/air mixer and an ammonia spraying grid; the dilution fan and the ammonia gas source are connected into an ammonia/air mixer, the ammonia/air mixer outputs the ammonia/air mixture to an ammonia injection grid, and the ammonia injection grid is arranged on an inlet channel of the dust removal and denitration integrated reactor; the dust removal and denitration integrated reactor is arranged between the cement kiln tail air preheater and the waste heat boiler flue.
The utility model has the advantages that:
1. can remove various pollutants such as flue gas dust nitrogen oxide in a synergistic manner, has a simple system and a small occupied area, greatly reduces the investment and operation cost, and improves the economy.
2. The system is stable and reliable in operation, the pollutant removal efficiency is high, and particularly in the cement industry, the flue gas and dust concentration is high, the denitration catalyst is easy to be poisoned and blocked, and the denitration efficiency of the method has obvious advantages under the condition that the SCR technology is limited.
3. The system is reasonably arranged, the temperature of the flue gas from the cement kiln tail air preheater to the waste heat boiler is just in an effective temperature range of the SCR catalyst, the performance of the catalyst can be fully exerted, and the accumulated dust of the waste heat boiler can be relieved after the flue gas is deeply dedusted, so that the efficiency of the waste heat boiler is improved.
4. The technology can be used for dedusting and denitration of cement kiln tail flue gas, and can also be used for flue gas purification in steel, glass and garbage power generation industries, and the application range is wide.
Drawings
FIG. 1: a system flow diagram;
FIG. 2: the dust removal and denitration integrated reactor is shown in a structural schematic diagram;
FIG. 3: the structure of the aluminum silicate fiber composite filter cylinder is schematically shown;
description of reference numerals: a bottom inlet channel 1, an ash bucket 2, an aluminum silicate fiber composite filter cylinder 3, a back flushing system 4 and an outlet channel 5.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The system for cooperatively removing the nitrogen oxides in the tail flue gas dust of the cement kiln comprises a dust removal and denitration integrated reactor and an ammonia spraying system; the dedusting and denitration integrated reactor sequentially comprises an inlet channel 1, an ash hopper 2, an aluminum silicate fiber composite filter cylinder 3, a back flushing system 4 and an outlet channel 5 from bottom to top; a denitration catalyst is embedded in the aluminum silicate fiber composite filter cylinder 3; the ammonia spraying system comprises a dilution fan, an ammonia gas source, an ammonia/air mixer and an ammonia spraying grid; the dilution fan and the ammonia gas source are connected into an ammonia/air mixer, the ammonia/air mixer outputs to an ammonia injection grid, and the ammonia injection grid is arranged on an inlet channel 1 of the dust removal and denitration integrated reactor; the dust removal and denitration integrated reactor is arranged between the cement kiln tail air preheater and the waste heat boiler flue.
The method for the cement kiln tail flue gas dust nitrogen oxide synergistic removal system comprises the following steps:
s1, conveying flue gas of an air preheater at the tail of a cement kiln to an inlet channel 1; the temperature of the flue gas is 330-350 ℃.
S2, mixing ammonia gas and dilution air, spraying the ammonia gas into flue gas through an ammonia spraying grid arranged on the inlet channel 1, and uniformly mixing the ammonia gas and the flue gas and then feeding the mixture into a dedusting and denitration integrated reactor;
s3, intercepting dust contained in the flue gas by the outer surface of the aluminum silicate fiber composite filter cylinder 3 in the dedusting and denitration integrated reactor; the filtering wind speed of the aluminum silicate fiber composite filter cylinder 3 is 0.6 m/min-1.5 m/min.
S4, when the gas passes through the aluminum silicate fiber composite filter cylinder 3, NO in the flue gas is under the action of a catalystXWith NH sprayed into the flue gas3Carrying out reaction;
s5, the reacted flue gas leaves to a waste heat boiler through an outlet channel 5;
s6, when the ash on the outer surface of the aluminum silicate fiber composite filter cylinder 3 reaches a certain degree, a pulse electromagnetic valve of the reverse blowing system 4 is opened, compressed air enters a reverse blowing pipeline, the ash on the outer surface of the aluminum silicate fiber composite filter cylinder 3 is blown down by the compressed air to an ash hopper 2, and the ash is output by an ash conveying system.
The utility model discloses a theory of operation is: mixing ammonia gas and dilution air, spraying the mixture into flue gas through an ammonia spraying grid arranged in a flue at the inlet of the reactor, uniformly mixing the ammonia gas and the flue gas, then feeding the mixture into the reactor, intercepting dust contained in the flue gas by the outer surface of an aluminum silicate fiber composite filter cylinder in the reactor, and passing the gas through a filter cylinder layer under the action of a catalyst to obtain NO in the flue gasXWith NH sprayed into the flue gas3Reacting, and allowing the reacted flue gas to leave through an outlet flue. When the dust on the outer surface of the filter cartridge reaches a certain degree, a pulse electromagnetic valve of the reverse blowing system is opened, compressed air enters a reverse blowing pipeline, and the dust on the outer surface of the filter cartridge is blown down to an ash hopper through the compressed air and is output through the dust conveying system. The dust removal and denitration integrated reactor is arranged between the cement kiln tail air preheater and the flue of the waste heat boiler, and the flue gas temperature at the position is just in an effective temperature range of the SCR catalyst, so that the performance of the catalyst can be fully exerted.
This dust removal denitration integration reactor can play the effect of dust and the collaborative desorption of nitrogen oxide, also can avoid the direct contact of denitration catalyst and dust simultaneously, has greatly reduced the phenomenon that denitration catalyst is poisoned to the flue gas is after the degree of depth removes dust, can alleviate exhaust-heat boiler's deposition, improves exhaust-heat boiler's efficiency.
Referring to fig. 1, 2 and 3, the technology for synergistically removing nitrogen oxides from dust and dust in tail flue gas of a cement kiln is characterized in that a dust removal and denitration integrated reactor is additionally arranged between an air preheater at the tail of the cement kiln and a flue of a waste heat boiler, ammonia gas is sprayed into the flue at the inlet of the reactor, the ammonia gas and the flue gas are uniformly mixed and then enter the reactor, and a core component in the reactor is an aluminum silicate fiber composite filter cylinder embedded with a catalyst, so that the technology has the functions of synergistically removing nitrogen oxides (NOx), dust and the like.
Example 1
The flue gas of a cement kiln tail air preheater is introduced into the dedusting and denitration integrated reactor, the filtering air speed corresponding to the aluminum silicate fiber composite filter cylinder is 0.77m/min, and the concentration of nitrogen oxides in flue gas dust at the inlet and the outlet of the reactor is shown in the table below.
TABLE 1 reactor Inlet and outlet flue gas dust nitrogen oxide concentration
It can be known from this table that the system for cement kiln tail flue gas dust nitrogen oxide collaborative desorption of this embodiment can be in coordination with desorption cement kiln tail flue gas dust and nitrogen oxide, and the desorption is efficient.
Claims (1)
1. A system for synergistically removing nitrogen oxides in tail flue gas dust of a cement kiln is characterized by comprising a dust removal and denitration integrated reactor and an ammonia spraying system; the dedusting and denitration integrated reactor sequentially comprises an inlet channel (1), an ash bucket (2), an aluminum silicate fiber composite filter cylinder (3), a back flushing system (4) and an outlet channel (5) from bottom to top; a denitration catalyst is embedded in the aluminum silicate fiber composite filter cylinder (3); the ammonia spraying system comprises a dilution fan, an ammonia gas source, an ammonia/air mixer and an ammonia spraying grid; the dilution fan and the ammonia gas source are connected into an ammonia/air mixer, the ammonia/air mixer outputs to an ammonia injection grid, and the ammonia injection grid is arranged on an inlet channel (1) of the dust removal and denitration integrated reactor; the dust removal and denitration integrated reactor is arranged between the cement kiln tail air preheater and the waste heat boiler flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920764623.4U CN210097394U (en) | 2019-05-24 | 2019-05-24 | Be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920764623.4U CN210097394U (en) | 2019-05-24 | 2019-05-24 | Be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination |
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| CN210097394U true CN210097394U (en) | 2020-02-21 |
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| CN201920764623.4U Active CN210097394U (en) | 2019-05-24 | 2019-05-24 | Be used for cement kiln tail flue gas dust nitrogen oxide desorption system in coordination |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064301A (en) * | 2019-05-24 | 2019-07-30 | 浙江天地环保科技有限公司 | One kind being used for cement kiln end exhaust gas dust nitrogen oxides cooperation-removal system and method |
| CN113546512A (en) * | 2020-04-24 | 2021-10-26 | 山东大明消毒科技有限公司 | Glass kiln denitration treatment device and denitration treatment process |
-
2019
- 2019-05-24 CN CN201920764623.4U patent/CN210097394U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064301A (en) * | 2019-05-24 | 2019-07-30 | 浙江天地环保科技有限公司 | One kind being used for cement kiln end exhaust gas dust nitrogen oxides cooperation-removal system and method |
| CN113546512A (en) * | 2020-04-24 | 2021-10-26 | 山东大明消毒科技有限公司 | Glass kiln denitration treatment device and denitration treatment process |
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| GR01 | Patent grant | ||
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Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee after: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee before: ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
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Address after: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee after: Zhejiang Zheneng Technology Environmental Protection Group Co.,Ltd. Country or region after: China Address before: 310012 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang (Hangzhou Neusoft business building) Patentee before: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Country or region before: China |