CN208671704U - The low-nitrogen discharged device of cement producing line kiln tail dore furnace based on CFD - Google Patents
The low-nitrogen discharged device of cement producing line kiln tail dore furnace based on CFD Download PDFInfo
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- CN208671704U CN208671704U CN201821142095.0U CN201821142095U CN208671704U CN 208671704 U CN208671704 U CN 208671704U CN 201821142095 U CN201821142095 U CN 201821142095U CN 208671704 U CN208671704 U CN 208671704U
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Abstract
The low-nitrogen discharged device of the utility model discloses a kind of cement producing line kiln tail dore furnace based on CFD, including the first raw material preheating can, the second raw material preheating can, dore furnace, rotary kiln, water fog generator and low coal burner；The discharge port of second raw material preheating can and the connecting pipe of the first reducing zone are equipped with raw material current divider, raw material current divider is connected to by the first isocon with second charging aperture, and be connected to by the second isocon with third feed inlet, low coal burner is connected to coal dust import by pipeline；Atomization runner is equipped in water fog generator and water body runner, the one end for being atomized runner are connected to the nozzle of water fog generator respectively with one end of water body runner, and the other end for being atomized runner is connect with air inlet pipe, and the other end of water body runner is connect with water inlet pipe.The utility model can reduce the generation of the yield of thermal NO X and reduction dore furnace fuel type NOX in rotary kiln, and be optimized using CFD model to the generation of dore furnace and rotary kiln and conversion process, to realize the discharge for reducing nitrogen oxides.
Description
Technical field
The utility model belongs to industrial combustion technical field, is based on CFD (computer computational fluid dynamics mould more particularly to one kind
Quasi- analysis software) cement producing line kiln tail dore furnace low-nitrogen discharged device.
Background technique
As national economy sustained and rapid development and total energy consumption are unprecedented soaring, China nitrogen oxides (NOX) discharge
Amount increases rapidly, if not taking further control measure, arrives the year two thousand twenty, nitrogen oxides NOXTotal emission volumn will become more than the U.S.
The country that nitrogen oxide emission ranks first in the world.
Currently, China possesses cement production enterprise nearly 5000, yield ranks the first in the world for years.NOXIn cement kiln
Occupy important proportion in tail gas pollution.The discharge of China's cement industry nitrogen oxides accounts for 10% of total release or so.Cement enterprise
Industry has become the third-largest NO after thermal power generation, vehicle exhaustXDischarge rich and influential family.
The harmfulness of nitrogen oxides is shown: nitrogen oxides is mainly balanced in an atmosphere with nitric oxide and nitrogen dioxide
It coexists.Nitrogen oxides can cause various respiratory tract disease, be to form the major pollutants of photochemical fog, and form acid rain
One of main acidic materials.Sulfur dioxide and nitrogen oxides can also form the fine particle of inorganic salts, aggravate thin in air
Grain object pollution.
The emission reduction problem of nitrogen oxides has become the significant problem for restricting China's environment and economic development.Cement plant at present
Substantially SNCR denitration system is all used, but the out of stock system effectiveness of SNCR is not high, ammonia nitrogen is relatively high, for the nitrogen oxygen for meeting standard requirements
The ammonia vol put into when compound discharge amount is larger, and has higher ammonia escape problem, and ammonium hydroxide production process is also inevitable
Cause a certain amount of carbon emission and nitrogen oxides pollution, actually cause environmental pollution in a disguised form marry again；In addition, SNCR denitration system
The high operating cost and its obstacle promoted conscientiously of system.
Utility model content
The utility model is mainly solving the technical problems that provide a kind of cement producing line kiln tail dore furnace based on CFD
Low-nitrogen discharged device reduces thermal NO in rotary kilnXYield and reduce dore furnace fuel type NOXGeneration, and benefit
The generation of dore furnace and rotary kiln and conversion process are optimized with CFD model, to realize the discharge for reducing nitrogen oxides.
In order to solve the above technical problems, the technical solution that the utility model uses is: a kind of cement based on CFD is raw
The low-nitrogen discharged device of producing line kiln tail dore furnace, including the first raw material preheating can, the second raw material preheating can, dore furnace, rotary kiln,
Water fog generator and low coal burner；The dore furnace includes the first zoneofoxidation and the first reducing zone, and the rotary kiln includes the
Titanium dioxide area and the second reducing zone, the discharge port of the first raw material preheating can are connected to first zoneofoxidation, and described second
The discharge port of raw material preheating can, the low coal burner and the water fog generator are connected to first reducing zone respectively；
First zoneofoxidation of the dore furnace is equipped with first charging aperture, and the first reducing zone of the dore furnace is from top to bottom
It is successively arranged second charging aperture, third feed inlet and coal dust import, the discharge port of the second raw material preheating can and described first
The connecting pipe of reducing zone is equipped with raw material current divider, and the raw material current divider is connected by the first isocon and the second charging aperture
It is logical, and be connected to by the second isocon with the third feed inlet, the low coal burner and the coal dust import pass through pipeline
Connection；
The water fog generator and dore furnace rotation connect, and atomization runner is equipped in the water fog generator, described
One end of atomization runner is connected to the nozzle of the water fog generator, and the other end of the atomization runner is connect with air inlet pipe, institute
The junction for stating air inlet pipe and the atomization runner is equipped with water inlet pipe；
It further include air feed pump, the low coal burner is connected to the connecting pipe of the low coal import with the air feed pump.
The utility model is that further technical solution is used by solving its technical problem:
It further says, the spiral structure distribution of the atomization runner.
It further says, the second charging aperture, the third feed inlet and the coal dust import are located at the dore furnace
Any side wall, the nozzle is located at opposite another side wall of the dore furnace.
It further says, first isocon is equipped with the first raw meal control valve.
It further says, second isocon is equipped with the second raw meal control valve.
It further says, the atomizing medium being atomized in runner is compressed air, nitrogen or inert gas.
It further says, the second charging aperture and the third feed inlet all deviate the side wall of dore furnace from the bottom to top.
It further says, the coal dust import from top to bottom deviates the side wall of dore furnace.
The utility model has the beneficial effects that
The utility model includes the first raw material preheating can, the second raw material preheating can, dore furnace, rotary kiln, water fog generator
With low coal burner, thermal NO in rotary kiln can be not only reducedXYield and reduce dore furnace fuel type NOXLife
At, and the generation of dore furnace and rotary kiln and conversion process are optimized using CFD model, to realize reduction nitrogen oxidation
The discharge of object；
It is specific as follows:
Atomization runner is equipped in the water fog generator of the utility model, the atomizing medium and water being atomized in runner are revolved from nozzle
Turn that spraying effect can be generated after spraying, the water droplet after atomization is mixed with the flue gas of the first reducing zone, and the water after atomization then exists
Gasification is evaporated in high-temperature flue gas, and forms certain density carbon monoxide and Hydrogen distribution region, these reducing atmospheres will decompose
Conversion of nitrogen oxides in furnace is free of contamination nitrogen；
The low coal burner of the utility model is connected to the connecting pipe of low coal import with air feed pump, utilizes air feed pump conveying
Air improves the fineness that coal dust enters dore furnace, and the reducing substances such as CO, HC are quickly converted in the case where anoxic conducive to coal dust；
The second raw material preheating can that the utility model is equipped with passes through the first isocon respectively and is connected to second charging aperture, and logical
The second isocon is crossed to be connected to third feed inlet, it is raw by the first raw meal control valve of control and the second raw meal control valve control second
Raw material in material preheating can enter the concentration in dore furnace, conducive to the raw material ratio for decomposing furnace bottom is adjusted, to prevent local temperature
It is excessively high to cause skinning.
Detailed description of the invention
Fig. 1 is the process device structure schematic diagram of the utility model；
Fig. 2 is the portion the A enlarged drawing of Fig. 1；
Each section label is as follows in attached drawing:
First raw material preheating can 1, the second raw material preheating can 2, dore furnace 3, the first zoneofoxidation 31, the first reducing zone 32,
Two feed inlets 33, third feed inlet 34, coal dust import 35, rotary kiln 4, the second zoneofoxidation 41, the second reducing zone 42, water mist occur
Device 5, atomization runner 51, air inlet pipe 52, water inlet pipe 53, nozzle 54, low coal burner 6, raw material current divider 7, air feed pump 8, first
Raw meal control valve 9 and the second raw meal control valve 10.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, to make the protection scope of the utility model apparent clear
Define.
Embodiment: a kind of low-nitrogen discharged device of the cement producing line kiln tail dore furnace based on CFD, as Figure 1-Figure 2,
Including the first raw material preheating can 1, the second raw material preheating can 2, dore furnace 3, rotary kiln 4, water fog generator 5 and low coal burner 6；
The dore furnace 3 includes the first zoneofoxidation 31 and the first reducing zone 32, and the rotary kiln 4 includes that the second zoneofoxidation 41 and second is gone back
The discharge port in former area 42, the first raw material preheating can 1 is connected to first zoneofoxidation 31, the second raw material preheating can 2
Discharge port, the low coal burner 6 and the water fog generator 5 be connected to respectively with first reducing zone 32；
First zoneofoxidation of the dore furnace 3 be equipped with first charging aperture, and the first reducing zone of the dore furnace from up to
Under be successively arranged second charging aperture 33, third feed inlet 34 and coal dust import 35, the discharge port of the second raw material preheating can with
The connecting pipe of first reducing zone is equipped with raw material current divider 7, and the raw material current divider 7 passes through the first isocon and described the
Two feed inlets connection, and being connected to the third feed inlet by the second isocon, the low coal burner 6 and the coal dust into
Mouth 35 passes through pipeline and is connected to；
The water fog generator and dore furnace rotation connect, and atomization runner 51, institute are equipped in the water fog generator
The one end for stating atomization runner is connected to the nozzle 54 of the water fog generator, and the other end and air inlet pipe 52 of the atomization runner connect
It connects, the junction of the air inlet pipe and the atomization runner is equipped with water inlet pipe 53；
It further include air feed pump 8, the low coal burner 6 connects with the connecting pipe of the low coal import and the air feed pump 8
It is logical.
The spiral structure distribution of the atomization runner 51.
The second charging aperture, the third feed inlet and the coal dust import are located at any side wall of the dore furnace,
The nozzle is located at opposite another side wall of the dore furnace.
First isocon is equipped with the first raw meal control valve 9.
Second isocon is equipped with the second raw meal control valve 10.
The atomizing medium being atomized in runner is compressed air, nitrogen or inert gas.
The second charging aperture 33 and the third feed inlet 34 all deviate the side wall of dore furnace from the bottom to top.
The coal dust import 35 from top to bottom deviates the side wall of dore furnace.
The utility model analyzes software with computer fluid dynamic simulation and establishes simulated flow pattern, obtains dore furnace and rotary furnace
Temperature field, particle concentration field, gas component field and raw material the key parameters such as decompose, and carry out pair with actual test data
Than using numerical simulation result, by making rational planning for, the combustion space of design and Optimal Decomposition furnace and rotary furnace, control is decomposed
Furnace and the specific reducing atmosphere of rotary furnace are greatly lowered the content of nitrogen oxides in effluent, realize cigarette by optimizing low nitrogen burning
The qualified discharge of gas nitrogen oxides.
The working principle of the utility model is as follows:
The utility model includes the first raw material preheating can, the second raw material preheating can, dore furnace, rotary kiln, water fog generator
With low coal burner, thermal NO in rotary kiln can be not only reducedXYield and reduce dore furnace fuel type NOXLife
At, and the generation of dore furnace and rotary kiln and conversion process are optimized using CFD model, to realize reduction nitrogen oxidation
The discharge of object；
It is specific as follows:
Atomization runner is equipped in the water fog generator of the utility model, the atomizing medium and water being atomized in runner are revolved from nozzle
Turn that spraying effect can be generated after spraying, the water droplet after atomization is mixed with the flue gas of the first reducing zone, and the water after atomization then exists
Gasification is evaporated in high-temperature flue gas, and forms certain density carbon monoxide and Hydrogen distribution region, these reducing atmospheres will decompose
Conversion of nitrogen oxides in furnace is free of contamination nitrogen；
The low coal burner of the utility model is connected to the connecting pipe of low coal import with air feed pump, utilizes air feed pump conveying
Air improves the fineness that coal dust enters dore furnace, and the reducing substances such as CO, HC are quickly converted in the case where anoxic conducive to coal dust；
The second raw material preheating can that the utility model is equipped with passes through the first isocon respectively and is connected to second charging aperture, and logical
The second isocon is crossed to be connected to third feed inlet, it is raw by the first raw meal control valve of control and the second raw meal control valve control second
Raw material in material preheating can enter the concentration in dore furnace, conducive to the raw material ratio for decomposing furnace bottom is adjusted, to prevent local temperature
It is excessively high to cause skinning.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure transformation made based on the specification and figures of the utility model, it is relevant to be applied directly or indirectly in other
Technical field is also included in the patent protection scope of the utility model.
Claims (8)
1. a kind of low-nitrogen discharged device of the cement producing line kiln tail dore furnace based on CFD, it is characterised in that: including the first raw material
Preheating can (1), the second raw material preheating can (2), dore furnace (3), rotary kiln (4), water fog generator (5) and low coal burner (6)；
The dore furnace includes the first zoneofoxidation (31) and the first reducing zone (32), and the rotary kiln includes the second zoneofoxidation (41) and the
Two reducing zones (42), the discharge port of the first raw material preheating can are connected to first zoneofoxidation, the second raw material preheating
The discharge port of tank, the low coal burner and the water fog generator are connected to first reducing zone respectively；
First zoneofoxidation of the dore furnace is equipped with first charging aperture, and the first reducing zone of the dore furnace is from top to bottom successively
Equipped with second charging aperture (33), third feed inlet (34) and coal dust import (35), the discharge port of the second raw material preheating can with
The connecting pipe of first reducing zone be equipped with raw material current divider (7), the raw material current divider by the first isocon with it is described
Second charging aperture connection, and be connected to by the second isocon with the third feed inlet, the low coal burner and the coal dust
Import is connected to by pipeline；
The water fog generator and dore furnace rotation connect, and atomization runner (51) is equipped in the water fog generator, described
One end of atomization runner is connected to the nozzle (54) of the water fog generator, the other end of the atomization runner and air inlet pipe (52)
The junction of connection, the air inlet pipe and the atomization runner is equipped with water inlet pipe (53)；
It further include air feed pump (8), the low coal burner is connected to the connecting pipe of the low coal import with the air feed pump.
2. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
In: the spiral structure distribution of the atomization runner.
3. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
In: the second charging aperture, the third feed inlet and the coal dust import are located at any side wall of the dore furnace, the spray
Mouth is located at opposite another side wall of the dore furnace.
4. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
In: first isocon is equipped with the first raw meal control valve (9).
5. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
In: second isocon is equipped with the second raw meal control valve (10).
6. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
In: the atomizing medium in atomization runner is compressed air, nitrogen or inert gas.
7. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
All deviate the side wall of dore furnace from the bottom to top in: the second charging aperture and the third feed inlet.
8. the low-nitrogen discharged device of the cement producing line kiln tail dore furnace according to claim 1 based on CFD, feature exist
In: the coal dust import from top to bottom deviates the side wall of dore furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821142095.0U CN208671704U (en) | 2018-07-19 | 2018-07-19 | The low-nitrogen discharged device of cement producing line kiln tail dore furnace based on CFD |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821142095.0U CN208671704U (en) | 2018-07-19 | 2018-07-19 | The low-nitrogen discharged device of cement producing line kiln tail dore furnace based on CFD |
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| Publication Number | Publication Date |
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| CN208671704U true CN208671704U (en) | 2019-03-29 |
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| CN201821142095.0U Active CN208671704U (en) | 2018-07-19 | 2018-07-19 | The low-nitrogen discharged device of cement producing line kiln tail dore furnace based on CFD |
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2018
- 2018-07-19 CN CN201821142095.0U patent/CN208671704U/en active Active
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