CN202747815U - Denitration, afterheat utilization and dust removal system for cement kiln - Google Patents
Denitration, afterheat utilization and dust removal system for cement kiln Download PDFInfo
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- CN202747815U CN202747815U CN 201220250131 CN201220250131U CN202747815U CN 202747815 U CN202747815 U CN 202747815U CN 201220250131 CN201220250131 CN 201220250131 CN 201220250131 U CN201220250131 U CN 201220250131U CN 202747815 U CN202747815 U CN 202747815U
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- denitration
- flue gas
- cement kiln
- heat
- utilization
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Abstract
The embodiment of the utility model discloses a denitration, afterheat utilization and dust removal system for a cement kiln and relates to the technical field of treatment for waste gas in a cement kiln, and the system not only facilitates environmental protection, but also can make full use of energy sources to achieve the purposes of energy conservation and emission reduction. The system comprises a primary dust removal device, a denitration device, an afterheat utilization device and a secondary dust removal device, wherein the primary dust removal device is used for collecting dust in combustion flue gas in the cement kiln; an inlet of the denitration device is connected with an outlet of the primary dust removal device, and the denitration device is used for carrying out denitration treatment on the flue gas treated by the primary dust removal device; the afterheat utilization device is connected with an outlet of the denitration device and is used for carrying out afterheat utilization on the flue gas treated by the denitration device; and the secondary dust removal device is arranged at the rear end of the afterheat utilization device and is used for carrying out secondary dust removal treatment on the flue gas treated by the afterheat utilization device. The denitration, afterheat utilization and dust removal system is suitable for denitration, afterheat utilization and dust removal of the combustion waste gas in the cement kiln.
Description
Technical field
The utility model relates to the exhaust-gas treatment of cement kiln, relates in particular to a kind of cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system.
Background technology
Nitrogen oxide is one of primary pollution source that causes atmosphere pollution.Usually said nitrogen oxide NO
XHave multiple multi-form: N
2O, NO, NO
2, N
2O
3, N
2O
4And N
2O
5, wherein NO and NO
2It is important atmosphere pollution.The 70% direct burning that comes from coal in the discharge capacity of China's nitrogen oxide.Cement industry is again the coal-fired rich and influential family of China, so the cement plant is NO
XOne of main source of discharging.
The utility model content
The utility model provides a kind of cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, not only is beneficial to environmental protection but also can takes full advantage of the energy, reaches the purpose of energy-saving and emission-reduction.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
A kind of cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system comprise:
The primary dust removing device is for the dust of collecting the cement kiln combustion product gases;
Denitrification apparatus, its entrance links to each other with the outlet of described primary dust removing device, is used for that the flue gas of processing through described primary dust removing device is carried out denitration and processes;
Residual heat using device links to each other with the outlet of described denitrification apparatus, is used for the flue gas of processing through described denitrification apparatus is carried out UTILIZATION OF VESIDUAL HEAT IN;
The two-stage dust removal device is arranged on the rear end of described residual heat using device, is used for that the flue gas through described residual heat using device is carried out final dusting and processes.
A kind of cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system that the utility model provides can be carried out denitration, UTILIZATION OF VESIDUAL HEAT IN and dust removal process to the waste gas of cement kiln, not only be beneficial to environmental protection but also can take full advantage of the energy.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the block diagram of a kind of cement kiln denitration of the utility model, UTILIZATION OF VESIDUAL HEAT IN and a kind of embodiment of dust pelletizing system;
Fig. 2 is the block diagram of a kind of cement kiln denitration of the utility model, UTILIZATION OF VESIDUAL HEAT IN and a kind of embodiment of dust pelletizing system.
The specific embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to a kind of cement kiln denitration of the utility model, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system.
Fig. 1 is the block diagram of a kind of cement kiln denitration of the utility model, UTILIZATION OF VESIDUAL HEAT IN and a kind of embodiment of dust pelletizing system.
Referring to shown in Figure 1, a kind of cement kiln denitration of the utility model, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system comprise:
Primary dust removing device 100 is for the dust of collecting the cement kiln combustion product gases;
Residual heat using device 102 links to each other with the outlet of described denitrification apparatus, is used for the flue gas of processing through described denitrification apparatus is carried out UTILIZATION OF VESIDUAL HEAT IN;
Two-stage dust removal device 103 is arranged on the rear end of described residual heat using device, is used for that the flue gas through described residual heat using device is carried out final dusting and processes.
A kind of cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system that the utility model provides can be carried out denitration, UTILIZATION OF VESIDUAL HEAT IN and dust removal process to the waste gas of cement kiln, not only be beneficial to environmental protection but also can take full advantage of the energy, and the utilization rate of the energy is provided.
In described cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, described primary dust removing device 100 is pre-dedusting device, can be electric cleaner, be preferably can process working temperature up to 300 ℃～400 ℃, the hot electrostatic precipitator of efficiency of dust collection more than 90%.The two-stage dust removal device can be selected and include but not limited to exhaust dust device with bag and electric dust collector.
In described cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, described denitrification apparatus adopts selective catalytic reduction (SCR) that flue gas is carried out denitration and processes.The SCR technology is reducing agent (NH
3, urea) under catalyst action, optionally with NO
XReaction generates N
2And H
2O, rather than by O
2Institute's oxidation is therefore be called " selectively ".Key reaction is as follows:
4NH
3+4NO+O
2→4N
2+6H
2O
4NH3+2NO
2+O
2→6N
2+6H
2O
Described denitrification apparatus 101 comprises:
Benitration reactor, its entrance links to each other with the outlet of described primary dust removing device, is provided with catalyst in Benitration reactor;
Reducing agent storage and feedway are used for the storage reducing agent and reducing agent are supplied to described ammonia-spraying grid place to denitration reactor inlet.
Benitration reactor wherein is arranged in the outlet of primary dust removing device, is conducive to alleviate flue gas to wearing and tearing, obstruction and the passivation of catalyst.Catalyst in the Benitration reactor can adopt honeycomb fashion, corrugated and flat etc., preferably adopts honeycomb fashion.The catalyst activity composition is titanium oxide and vanadic anhydride.Flue gas at the uniform velocity passes through in catalyst.The reaction temperature of denitrating catalyst is preferably 300 ℃～400 ℃.
The reducing agent of storing in the reducing agent storage system wherein can be urea, ammoniacal liquor and liquefied ammonia.
In one embodiment, described reducing agent storage and feedway comprise:
The reducing agent storage system is used for the storage reducing agent;
Reducing agent supply system, an one entrance links to each other with described reducing agent storage system, and another entrance is connected with the entrance of described Benitration reactor, is used for delivering to by described reducing agent the ammonia-spraying grid place of denitration reactor inlet.
Described reducing agent is preferably liquefied ammonia, and liquefied ammonia is evaporated to ammonia in reducing agent supply system, then is admitted to the ammonia-spraying grid place of denitration reactor inlet.
In described cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, described residual heat using device 102 comprises: device for generating power by waste heat, link to each other with the outlet of described Benitration reactor, and be used for utilizing the waste heat of the flue gas of processing through described denitrification apparatus to generate electricity.The waste heat of the flue gas that the described denitrification apparatus of process was processed, the mode of water in the circulating water pipe by the heat transmission heated obtain water vapour, through further processing the water vapour that obtains HTHP, the water vapour pushing turbine of HTHP does work, and steam turbine drives generator and generates electricity.
In described cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, described residual heat using device is except comprising described device for generating power by waste heat, also comprise: raw material grinding mill, link to each other with described device for generating power by waste heat, be used for the waste heat recycling to the flue gas of the described device for generating power by waste heat of process, the raw material in the raw material grinding mill is preheated; Perhaps also comprise: raw material grinding mill, link to each other with described device for generating power by waste heat, be used for the waste heat recycling to the flue gas of the described device for generating power by waste heat of process, the raw material in the raw material grinding mill is preheated; Powder concentrator links to each other with described raw material grinding mill, is used for the waste heat recycling to the flue gas of the described raw material grinding mill of process, and the selected powder that gets in the powder concentrator is preheated.
Preferably, between described device for generating power by waste heat and described raw material grinding mill, be provided with air-introduced machine, be the flue gas supercharging, satisfy the system process needs.
In described cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, except comprising described primary dust removing device, outside described denitrification apparatus and the described residual heat using device, also comprise: the bypass humidifying device, its entrance links to each other with the outlet of described denitrification apparatus, be used for that the flue gas of processing through described denitrification apparatus is directly carried out humidifying cooling and process, in order to make the arts demand of the temperature meeting tier 2 dedusting of flue gas.
Wherein, the entrance of described bypass humidifying device is except with the outlet of described denitrification apparatus links to each other, the entrance of described humidifying device also links to each other with the outlet of described device for generating power by waste heat, so that when device for generating power by waste heat need to overhaul, but the flue gas by-passing is gone out, do not produce normally and do not affect cement kiln, the main purpose of humidification is cooling, makes the arts demand of the temperature meeting tier 2 dedusting of flue gas.
Embodiment 1:
Referring to shown in Figure 2, an embodiment of a kind of cement kiln denitration of the utility model, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system comprises:
Hot electrostatic precipitator 1 is for the dust of collecting the cement kiln combustion product gases;
Reducing agent storage and feedway 5 are used for the storage reducing agent and reducing agent are supplied to described ammonia-spraying grid place to denitration reactor inlet; Benitration reactor 2 and reducing agent storage and feedway 5 combine and are called denitrification apparatus 6;
Reducing agent can be urea, ammoniacal liquor and liquefied ammonia.Be preferably liquefied ammonia, after liquefied ammonia flashes to ammonia, send into the ammonia-spraying grid place of the entrance of Benitration reactor.
Device for generating power by waste heat 7 links to each other with the outlet of described Benitration reactor, is used for utilizing the waste heat of the flue gas of processing through described denitrification apparatus to generate electricity;
Air-introduced machine 8 will be guided raw material grinding mill 9 into through the flue gas of described device for generating power by waste heat;
Raw material grinding mill 9 links to each other with described air-introduced machine, is used for the waste heat recycling to the flue gas of the described device for generating power by waste heat of process, and raw material is preheated;
Two-stage dust removal device 11 is used for the flue gas through UTILIZATION OF VESIDUAL HEAT IN is carried out final dusting; The dust arrester 11 that final dusting after the UTILIZATION OF VESIDUAL HEAT IN adopts includes but not limited to electric cleaner, sack cleaner;
Air-introduced machine 12 and the chimney 13 that links to each other with air-introduced machine, the flue gas behind the process final dusting is guided chimney into by air-introduced machine and is entered in the atmospheric environment by chimney;
Bypass conditioning Tower 14, its entrance is except with the outlet of described Benitration reactor links to each other, the entrance of described humidifying device also links to each other with the outlet of described device for generating power by waste heat, so that when device for generating power by waste heat need to overhaul, but the flue gas by-passing is gone out, do not produce normally and do not affect cement kiln, the main purpose of humidification is cooling, makes the arts demand of the temperature meeting tier 2 dedusting of flue gas.The outlet of conditioning Tower links to each other with the entrance of the described two-stage dust removal device 11 that is used for final dusting.
In the present embodiment, the duty of bypass conditioning Tower has three kinds: the 1st, flue gas after the denitration through device for generating power by waste heat, raw material grinding mill, select the bootstrap system such as extension set after, enter the dust arrester that final dusting adopts, under this state, flue gas need not pass through conditioning Tower; The 2nd, after the flue gas after the denitration directly passes through the conditioning Tower humidifying cooling, enter the dust arrester that final dusting adopts, under this state, flue gas need not pass through bootstrap system; The 3rd, flue gas after the denitration carries out cogeneration through device for generating power by waste heat, and after by the air-introduced machine behind the device for generating power by waste heat flue gas being introduced the conditioning Tower humidifying cooling, enters the dust arrester that final dusting adopts, under this state, flue gas is without raw material grinding mill and powder concentrator.
In order to control the flow direction of flue gas, between Benitration reactor 2 and device for generating power by waste heat 7, and between Benitration reactor 2 and bypass conditioning Tower 14, be equipped with valve; Between air-introduced machine 12 and raw material grinding mill 9, and between air-introduced machine 12 and bypass conditioning Tower 14, also be equipped with valve.
The waste gas of cement kiln burning is high dirt waste gas, and the utility model is applicable to denitration, UTILIZATION OF VESIDUAL HEAT IN and the dedusting of the high dirt waste gas of cement kiln burning generation.
The above; it only is the specific embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (9)
1. a cement kiln denitration, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system is characterized in that, comprising:
The primary dust removing device is for the dust of collecting the cement kiln combustion product gases;
Denitrification apparatus, its entrance links to each other with the outlet of described primary dust removing device, is used for that the flue gas of processing through described primary dust removing device is carried out denitration and processes;
Residual heat using device links to each other with the outlet of described denitrification apparatus, is used for the flue gas of processing through described denitrification apparatus is carried out UTILIZATION OF VESIDUAL HEAT IN;
The two-stage dust removal device is arranged on the rear end of described residual heat using device, is used for that the flue gas through described residual heat using device is carried out final dusting and processes.
2. cement kiln denitration according to claim 1, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system is characterized in that, described primary dust removing device is hot electrostatic precipitator.
3. cement kiln denitration according to claim 1, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system is characterized in that, described denitrification apparatus comprises:
Benitration reactor, its entrance links to each other with the outlet of described primary dust removing device, is provided with catalyst in Benitration reactor, is provided with ammonia-spraying grid at denitration reactor inlet;
Reducing agent storage and feedway are used for the storage reducing agent and reducing agent are supplied to described ammonia-spraying grid place to denitration reactor inlet.
4. cement kiln denitration according to claim 3, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system is characterized in that, described residual heat using device comprises:
Device for generating power by waste heat links to each other with the outlet of described Benitration reactor, is used for utilizing the waste heat of the flue gas of processing through described denitrification apparatus to generate electricity.
5. cement kiln denitration according to claim 4, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system is characterized in that,
Described residual heat using device also comprises: raw material grinding mill, link to each other with described device for generating power by waste heat, and the waste heat of the flue gas of the described device for generating power by waste heat of process preheats the raw material in the raw material grinding mill; Perhaps
Described residual heat using device also comprises: raw material grinding mill, link to each other with described device for generating power by waste heat, and the waste heat of the flue gas of the described device for generating power by waste heat of process preheats the raw material in the raw material grinding mill; Powder concentrator links to each other with described raw material grinding mill, and the waste heat of the flue gas of the described raw material grinding mill of process preheats the powder in the powder concentrator.
6. cement kiln denitration according to claim 5, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system is characterized in that, are provided with air-introduced machine between described device for generating power by waste heat and described raw material grinding mill.
7. cement kiln denitration according to claim 1, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, it is characterized in that, also comprise: the bypass humidifying device, its entrance links to each other with the outlet of described denitrification apparatus, is used for that the flue gas of processing through described denitrification apparatus is directly carried out humidification and processes.
8. according to claim 4,5 or 6 described cement kiln denitrations, UTILIZATION OF VESIDUAL HEAT IN and dust pelletizing system, it is characterized in that, also comprise: the bypass humidifying device, its entrance links to each other with the outlet of described denitrification apparatus and the outlet of described device for generating power by waste heat respectively, is used for that the flue gas processed through described denitrification apparatus and the flue gas that passes through described device for generating power by waste heat are carried out humidification and processes.
9. cement kiln denitration according to claim 3 and bootstrap system is characterized in that, described reducing agent storage and feedway comprise:
The reducing agent storage system is used for the storage reducing agent;
Reducing agent supply system, an one entrance links to each other with described reducing agent storage system, and another entrance is connected with the entrance of described Benitration reactor, is used for reducing agent is delivered to the ammonia-spraying grid place of denitration reactor inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250131 CN202747815U (en) | 2012-05-31 | 2012-05-31 | Denitration, afterheat utilization and dust removal system for cement kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250131 CN202747815U (en) | 2012-05-31 | 2012-05-31 | Denitration, afterheat utilization and dust removal system for cement kiln |
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| Publication Number | Publication Date |
|---|---|
| CN202747815U true CN202747815U (en) | 2013-02-20 |
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| CN 201220250131 Expired - Fee Related CN202747815U (en) | 2012-05-31 | 2012-05-31 | Denitration, afterheat utilization and dust removal system for cement kiln |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661667A (en) * | 2012-05-31 | 2012-09-12 | 河南中材环保有限公司 | System and method for denitration, residual heat utilization and dedusting of cement kiln |
| CN103480272A (en) * | 2013-10-01 | 2014-01-01 | 王脯胜 | Dust-removing, denitration and desulfurization process and device for flue gas of glass kiln |
-
2012
- 2012-05-31 CN CN 201220250131 patent/CN202747815U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661667A (en) * | 2012-05-31 | 2012-09-12 | 河南中材环保有限公司 | System and method for denitration, residual heat utilization and dedusting of cement kiln |
| CN103480272A (en) * | 2013-10-01 | 2014-01-01 | 王脯胜 | Dust-removing, denitration and desulfurization process and device for flue gas of glass kiln |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20200531 |