CN108211709A - Kiln gas cleaning equipment - Google Patents
Kiln gas cleaning equipment Download PDFInfo
- Publication number
- CN108211709A CN108211709A CN201810252841.XA CN201810252841A CN108211709A CN 108211709 A CN108211709 A CN 108211709A CN 201810252841 A CN201810252841 A CN 201810252841A CN 108211709 A CN108211709 A CN 108211709A
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- Prior art keywords
- ammonia
- section
- electrostatic
- reducing agent
- cleaning equipment
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrostatic Separation (AREA)
Abstract
The present invention relates to cleaning equipment more particularly to kiln gas cleaning equipments.Low-temperature denitration equipment, desulphurization plant and wet electrostatic demisting cleaner including passing sequentially through flue connection, the low-temperature denitration equipment includes reactor body, reactor body is divided into four sections from below to up, it is spray ammonia section, mixing section, flow equalization section and conversion zone respectively, ammonia injection apparatus is arranged at spray ammonia section, and the reducing agent preparation system and catalyst ejector device are arranged on mixing section.Wet electrostatic demisting cleaner includes electrostatic precipitator ontology and the high voltage electrostatic device being arranged in electrostatic precipitator, the high voltage electrostatic device is connected with several corona wires, and several corona wires are inserted into hollow precipitation pole pipe and not with precipitating the inner wall of pole pipe and contact respectively.The cleaning equipment purification efficiency of the present invention is high, clean-up effect is it will be evident that can realize below minimum discharge 5mg.
Description
【Technical field】
The present invention relates to cleaning equipment more particularly to kiln gas cleaning equipments.
【Background technology】
Nitrogen oxides is collectively referred to as NOx, is one of primary pollution source of atmosphere pollution.Harm it is maximum mainly：NO、NO2.
The main harm of NOx is as follows：(1) the toxic effect to human body；(2) the toxic effect to plant；(3) acid rain, acid mist can be formed；
(4) photochemical fog is formed with hydrocarbon；(5) ozone layer is destroyed.A large amount of flue gas can be generated in kiln operation, and
And need to discharge air, contain the pollutants such as NOx, SOx, dust in this partial fume, exist to environment and pollute.With China's political affairs
The environmental protection policy that mansion is formulated has carried out stringent limitation with regulation to the discharge capacity of NOx, it is desirable that the cigarette containing NOx, SOx, dust
Gas comprehensive treatment, improvement include denitration, desulfurization and dedusting.Traditional kiln gas processing system treatment effeciency is not high, during discharge
The discharge of poisonous waste for still having content higher is in an atmosphere, it is therefore necessary to provide a kind of efficient kiln gas cleaning equipment.
【Invention content】
The purpose of the present invention is to provide a kind of purification efficiency height, the apparent kiln gas cleaning equipments of clean-up effect.
To achieve the above object, kiln gas cleaning equipment of the invention, including passing sequentially through the connection of flue 40
Low-temperature denitration equipment 10, desulphurization plant 20 and wet electrostatic demisting cleaner 30, the low-temperature denitration equipment 10 include anti-
Reducing agent preparation system 12, ammonia injection apparatus 13 and the catalyst spray answered device ontology 11 and be arranged in reactor body 11
Injection device 14, the reducing agent preparation system 12 prepare reducing agent and are mixed with flue gas, the ammonia injection apparatus 13 to
Flue gas injection ammonia, the catalyst ejector device 14 jet catalyst into the gas that ammonia and flue gas mix；Described
Reactor body 11 is divided into four sections from below to up, is to spray ammonia section 15, mixing section 16, flow equalization section 17 and conversion zone 18, ammonia respectively
Injection apparatus 13 is arranged at spray ammonia section 15, and the reducing agent preparation system 12 and catalyst ejector device 14 are arranged on mixing
Section 16.
Further, the wet electrostatic demisting cleaner 30 includes electrostatic precipitator ontology 31 and is arranged on electric demisting
High voltage electrostatic device 32 in device 31, the high voltage electrostatic device 32 are connected with several corona wires 34, described several
Corona wire 34 is inserted into hollow precipitation pole pipe 33 and not with precipitating the inner wall of pole pipe 33 and contacts respectively.
The contribution of the present invention is that for operating cost than relatively low, catalyst efficiency activity is higher, 180 DEG C or more cryogenic conditions
Lower catalyst activity is preferable, the smaller consumption that can reduce ammonia of ammonia/nitrogen mole, and then lowers operating cost；Catalyst uses
3 years service life or more, sexual valence are higher, therefore catalyst amortization charge is low；The present invention also uses catalyst on-line regeneration technology：It should
Technology can restore the activity of catalyst with quick in situ, and not influence system normal operation, reduce the time of catalyst regeneration
Consumption and working strength.At low cost, energy conservation and environmental protection of the invention, and flue gas ash removal effect is good.Since dust and water phase are mutually blended shape
Into droplet there is good electric conductivity, therefore, it is possible to collect the powder of stickiness, high specific resistance that electrostatic precipitator cannot collect
Dirt.There is no rapping apparatus and use single tube one-shot device, there is no secondary fly-up problems, and event is also easily gone out there is no transmission device
The problem of barrier.Corona discharge power times over electrostatic precipitator can be provided, there is very high demisting efficiency of dust collection, particularly with tiny
Dust particles, droplet, aerosol, metallic particles, acid mist etc. there is very strong trapping ability.
【Description of the drawings】
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the internal structure schematic diagram of low-temperature denitration equipment of the present invention.
Fig. 3 is the internal structure schematic diagram of wet electrostatic demisting cleaner of the present invention.
【Specific embodiment】
The following example is being explained further and supplementing to the present invention, and the present invention is not limited in any way.
Embodiment 1
As shown in Figure 1, 2, the kiln gas cleaning equipment of the present embodiment, including passing sequentially through the low of the connection of flue 40
Warm denitration device 10, desulphurization plant 20 and wet electrostatic demisting cleaner 30, the low-temperature denitration equipment 10 include reaction
The device ontology 11 and reducing agent preparation system 12 being arranged in reactor body 11, ammonia injection apparatus 13 and catalyst ejector
Device 14, the reducing agent preparation system 12 prepare reducing agent and are mixed with flue gas, and the ammonia injection apparatus 13 is to cigarette
Gas jet ammonia, the catalyst ejector device 14 jet catalyst into the gas that ammonia and flue gas mix；Described is anti-
Device ontology 11 is answered to be divided into four sections from below to up, is spray ammonia section 15, mixing section 16, flow equalization section 17 and conversion zone 18 respectively, ammonia sprays
Injection device 13 is arranged at spray ammonia section 15, and the reducing agent preparation system 12 and catalyst ejector device 14 are arranged on mixing section
16。
Flue gas enters first from flue 40 in the present embodiment carries out denitration reaction in low-temperature denitration equipment 10, then from low
Warm denitration device 10, which enters, carries out desulfurization in 20 equipment of desulphurization plant, finally enter wet electrostatic demisting from 20 equipment of desulphurization plant
It is dusted in cleaner 30, finally from 5 row of pipe to air.When carrying out denitration, reactor body 11 is from below to up
It is divided into four sections, is that spray ammonia section 15, mixing section 16, flow equalization section 17 and conversion zone 18, ammonia injection apparatus 13 are arranged on spray ammonia respectively
At section 15, the reducing agent preparation system 12 and catalyst ejector device 14 are arranged on mixing section 16.Ammonia injection apparatus 13
It is arranged at spray ammonia section 15, ammonia and flue gas is made to contact for the first time, then prepares reducing agent by reducing agent in mixing section 16
System 12 prepare after with smoke contacts, then catalyst sprayed by catalyst ejector device 14 into flue gas, in mixing section 16
It is sufficiently mixed, enters flow equalization section 17, flow equalization section 17 makes flue gas uniformly enter conversion zone 18, occurs in conversion zone following anti-
Should,
4NO+4NH3+O2→4N2+6H2O
6NO2+8NH3→7N2+12H2O
Achieve the purpose that purify N0x in air.
Embodiment 2
As shown in Figure 1, 2, 3, the wet electrostatic demisting cleaner 30 described in the present embodiment includes electrostatic precipitator ontology
31 and the high voltage electrostatic device 32 that is arranged in electrostatic precipitator 31, the high voltage electrostatic device 32 be connected with several corona wires
34, several corona wires 34 are inserted into hollow precipitation pole pipe 33 and not with precipitating the inner wall of pole pipe 33 and connect respectively
It touches.Operation principle is as electrostatic precipitator, and only receiving electrode corresponds to 1 using cellular Pipe bundle structure, each pole pipe that precipitates
Cathode corona wire.Using high voltage electrostatic device 32 to the corona wire 34 that is erected in wet electrostatic demisting cleaner 30 during work
Apply negative high-voltage electricity, so as to form non-uniform high-voltage electrostatic field and two electricity between corona wire 34 and precipitation pole pipe 33
Pole is coaxially arranged, precipitates the distance between the electric field strength of each point and the point and corona wire 34 in pole pipe 33 and is inversely proportional.
Under the action of electric field force, entire precipitate all forms corona zone inside pole pipe 33, in corona zone, the anion (electronics) of high concentration
Directed movement continuously is done so as to form corona current to precipitation pole pipe 33 from corona electrode.When containing water mist, dust and
When the flue gas of other pollutants enters precipitation pole pipe 33, due to the collision and diffusion of ion, water mist, dust and pollutant are charged,
Then it arrives at the inner wall of precipitation pole pipe 34 rapidly under the action of electric field force and releases charge simultaneously, in precipitation 34 inner wall of pole pipe
Liquid film is formed, liquid film, dust and pollutant, which are flowed under the effect of gravity in the collecting tank of wet electrostatic demisting cleaner 30, to be collected
Middle processing, so as to achieve the purpose that trap flue fog drip, dust and other pollutants.Wet electrostatic demisting cleaner 30
Dedusting demisting process can be summarized as the following four stage:Charged, the charged cloud particle of the particles such as ionization, the cloud of gas sinks
The cleaning of collection, dust., wet electrostatic demisting cleaner also has the advantages that following 4:(1) since dust mutually blends with water phase
The droplet of formation has good electric conductivity, therefore, it is possible to collect the powder of stickiness, high specific resistance that electrostatic precipitator cannot collect
Dirt.(2) single tube one-shot device is used without rapping apparatus, there is no secondary fly-up problems, also easy there is no transmission device
Out of order problem.(3) corona discharge power times over electrostatic precipitator can be provided, there is very high demisting efficiency of dust collection, especially
There is very strong trapping ability for tiny dust particles, droplet, aerosol, metallic particles, acid mist etc..Electricity between electrode
Field Ex is radial direction, and value isIn formula:U:
It is applied to interelectrode voltage；R:The radius of external electrode；r:The radius of internal electrode；X:Space any point is off-axis
The distance of line.(4) in the case of using microcomputer controlled electro source and novel discharge electrode, dust particles, droplet, gas in flue gas
Colloidal sol, metallic particles, acid mist etc. can reach more than 0.1m/s in the migration velocity of electric field, and some is up to 0.12m/s.Especially value
It obtains it is to be noted that the wet electrostatic demisting cleaner of wide polar distance, in raising dedusting demisting efficiency, reduces dedusting demisting into we
There is a very big advantage in face, while be also one of method for solving corona blocking is that current wet electrostatic demisting cleaner develops
One new trend.And it realizes below minimum discharge 5mg.
Although being disclosed by above example to the present invention, protection scope of the present invention is not limited thereto,
Under conditions of without departing from present inventive concept, deformation, replacement for done to above each component etc. falling into right of the invention
In claimed range.
Claims (2)
1. kiln gas cleaning equipment, including passing sequentially through the low-temperature denitration equipment (10) of flue (40) connection, desulfurization is set
Standby (20) and wet electrostatic demisting cleaner (30), it is characterised in that：The low-temperature denitration equipment (10) is including reactor
Ontology (11) and the reducing agent preparation system (12) being arranged in reactor body (11), ammonia injection apparatus (13) and catalysis
Agent injection apparatus (14), the reducing agent preparation system (12) prepare reducing agent and are mixed with flue gas, ammonia injection
To flue gas injection ammonia, the catalyst ejector device (14) is sprayed into the gas that ammonia and flue gas mix urges device (13)
Agent；The reactor body (11) is divided into four sections from below to up, is spray ammonia section (15), mixing section (16), flow equalization section respectively
(17) it is arranged at spray ammonia section (15) with conversion zone (18), ammonia injection apparatus (13), the reducing agent preparation system (12)
Mixing section (16) is arranged on catalyst ejector device (14).
2. kiln gas cleaning equipment as described in claim 1, it is characterised in that：The wet electrostatic demisting cleaner
(30) including electrostatic precipitator ontology (31) and the high voltage electrostatic device (32) being arranged in electrostatic precipitator (31), the high pressure is quiet
Electric installation (32) is connected with several corona wires (34), and several corona wires (34) are inserted into hollow receiving electrode respectively
It is contacted in pipe (33) and not with precipitating the inner wall of pole pipe (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252841.XA CN108211709A (en) | 2018-03-26 | 2018-03-26 | Kiln gas cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252841.XA CN108211709A (en) | 2018-03-26 | 2018-03-26 | Kiln gas cleaning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108211709A true CN108211709A (en) | 2018-06-29 |
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ID=62659994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810252841.XA Pending CN108211709A (en) | 2018-03-26 | 2018-03-26 | Kiln gas cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108211709A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779344A (en) * | 2018-07-11 | 2020-02-11 | 河北鸿科碳素有限公司 | Method for purifying carbon calcination flue gas for aluminum |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551033A (en) * | 2013-10-10 | 2014-02-05 | 北京水木星源环保科技有限公司 | Scr denitration device and flue gas denitration method |
| CN203678254U (en) * | 2014-01-27 | 2014-07-02 | 广东亮科环保工程有限公司 | Improved SCR (Selective Catalytic Reduction) reactor |
| CN104190253A (en) * | 2014-08-25 | 2014-12-10 | 上海宝钢节能环保技术有限公司 | Coke oven flue gas SCR denitration system |
| WO2017112178A1 (en) * | 2015-12-21 | 2017-06-29 | Linde Aktiengesellschaft | Methods for removing contaminants from gas streams |
| CN107754578A (en) * | 2017-10-20 | 2018-03-06 | 佛山市莫森环境工程有限公司 | A kind of industry coal-boiler flue gas minimum discharge complete set of equipments |
-
2018
- 2018-03-26 CN CN201810252841.XA patent/CN108211709A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551033A (en) * | 2013-10-10 | 2014-02-05 | 北京水木星源环保科技有限公司 | Scr denitration device and flue gas denitration method |
| CN203678254U (en) * | 2014-01-27 | 2014-07-02 | 广东亮科环保工程有限公司 | Improved SCR (Selective Catalytic Reduction) reactor |
| CN104190253A (en) * | 2014-08-25 | 2014-12-10 | 上海宝钢节能环保技术有限公司 | Coke oven flue gas SCR denitration system |
| WO2017112178A1 (en) * | 2015-12-21 | 2017-06-29 | Linde Aktiengesellschaft | Methods for removing contaminants from gas streams |
| CN107754578A (en) * | 2017-10-20 | 2018-03-06 | 佛山市莫森环境工程有限公司 | A kind of industry coal-boiler flue gas minimum discharge complete set of equipments |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779344A (en) * | 2018-07-11 | 2020-02-11 | 河北鸿科碳素有限公司 | Method for purifying carbon calcination flue gas for aluminum |
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Application publication date: 20180629 |