CN207734844U - A kind of middle low-temperature flue gas de-dusting de-nitration integrated - Google Patents
A kind of middle low-temperature flue gas de-dusting de-nitration integrated Download PDFInfo
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- CN207734844U CN207734844U CN201721813016.XU CN201721813016U CN207734844U CN 207734844 U CN207734844 U CN 207734844U CN 201721813016 U CN201721813016 U CN 201721813016U CN 207734844 U CN207734844 U CN 207734844U
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Abstract
The utility model is related to a kind of middle low-temperature flue gas de-dusting de-nitration integrateds, including dust separation unit, ammonia sky mixing penetrating unit, heat exchange unit and the denitration unit being successively set on from bottom to top in a tower body；Circumferentially arranged with multiple air inlets, each air inlet connects one end of flue gas intake stack by winding pipe respectively for the tower body lower part of the dust separation unit, and the other end of flue gas intake stack is connected with the desulfurization fume outlet of external desulfurization unit；In the tower body of dust separation unit deflector and filter bag are evenly distributed with equipped with air inlet, multiple rows of filter bag is distributed in tower body vertically, air inlet is set between filter bag and air inlet and is evenly distributed with deflector, and filter bag top sets pulse spraying equipment, and pulse spraying equipment connects external compression airflow pipe.The utility model integrates dedusting, heat exchange, denitration, efficient to dust, NOx removal, and apparatus structure is simple, reliable for operation, and investment operating cost is low, and service life is long.
Description
Technical field
The utility model is related to cock-oven gas purifying technical field more particularly to a kind of middle low-temperature flue gas dedusting denitration one
Makeup is set.
Background technology
Currently, country is higher and higher to environmental requirement,《Coking chemistry emission of industrial pollutants standard》(GB16171-
2012) dust is discharged to coke oven stack gases and NOx is limited, forbid to discharge without the flue gas for handling up to standard.It is right at this stage
The treatment technology of coke oven flue exhaust gas and dust and NOx mainly have wet dedusting denitration technology, activated carbon dedusting denitration technology and in
Low-temperature flue gas dedusting denitration and denitrating catalyst Thermal desorption integrated technique, but these technologies all exist in actual moving process
Some drawbacks.
The big generation secondary pollution of wet dedusting denitration technology system complex, water consumption, and the oxidation efficiency of NOx is not high makes
At resource serious waste, prohibited using wet dedusting denitration technology in some local governments.
Activated carbon dedusting denitration technology easily forms hot spot, has fire hazard, equipment volume huge；And it actually answers at this stage
It is less with example, still it is in the pilot plant test stage.
The Chinese patent of Patent No. ZL201410478420.0 disclose it is a kind of " middle low-temperature flue gas desulfurization and dedusting denitration and
Denitrating catalyst Thermal desorption integrated apparatus ", including be integrated in from the bottom to top in a tower body desulfurization dust clean-up stage, parsing
Ammonia mixing section and denitration reaction section are sprayed, first passing through does not have the desulfurizing agent reacted completely and Desulphurization in sock filtration flue gas, make cigarette
Further desulfurization is come into full contact with desulfurizing agent when gas is by filtering dust layer, ammonia is then sprayed into the cigarette after sock filtration
It is sufficiently mixed with it in gas, then air is discharged into after denitrating catalyst denitration；High temperature pyrolysis analysis apparatus is set to denitration catalyst simultaneously
Agent carries out online Thermal desorption regeneration, and low-temperature denitration catalyst continues service life in holding；Pass through filter bag and mixing current equalizing structure
Body is arranged, and velocity of flue gas field and temperature field is made integrally to disguise in middle low-temperature flue gas desulfurization and dedusting denitration and denitrating catalyst Thermal desorption
It sets interior uniformly distributed, realizes the purpose of NO_x Reduction by Effective；The high-temperature gas that high temperature pyrolysis gassing body generally use hot-blast stove generates, however
Utility model in engineering actual motion, hot-blast stove the Thermal desorption of catalyst is acted on it is little, be more as heating flue gas and
With, and following situations can be caused：1) hot-blast stove cost of investment is high, increases construction investment operating cost；2) hot-blast stove Yin Qitong
Crossing the scheme that blending high-temperature flue gas makes exhaust gas volumn heat up certainly will cause to handle flue gas increase, increase construction investment operating cost；3)
Hot-blast stove needs to carry out the chain complexity for increasing whole system with whole system；4) hot-blast stove control it is bad it is easy occur it is new
NOx is generated, and increases the operating load of equipment.In addition it is much high in the catalyst price of low-temperature flue gas characteristic selection in adapting to
In typical catalyst in the market, engineering cost is caused to increase very much.
On the other hand, existing coke-oven plant mainly uses during dry coke quenching with N mainly based on Dry Quenching2Based on
Gas STRENGTH ON COKE cooled down, be up to 900~980 DEG C with the gas temperature after coke heat, utilize this high-temperature gas waste heat
It is used using, turbine generator output generated energy factory complete enough and superfluous, the extra grid-connected valence of electricity is usually uneconomical, therefore in factory
It is interior to provide one the approach of providing auxiliary power amount extra high-temperature flue gas in other words be made full use of to be more advantageous to the throwing for reducing whole factory
Money, operating cost.
Invention content
The utility model combines existing middle low-temperature flue gas dedusting denitration technology and dry coke quenching UTILIZATION OF VESIDUAL HEAT IN present situation, provides one
Low-temperature flue gas de-dusting de-nitration integrated in kind integrates dedusting, heat exchange, denitration, efficient to dust, NOx removal, dress
Set it is simple in structure, it is reliable for operation, investment operating cost it is low, service life is long.
In order to achieve the above object, the utility model is realized using following technical scheme：
A kind of middle low-temperature flue gas de-dusting de-nitration integrated, including it is successively set on removing in a tower body from bottom to top
Dirt clean unit, ammonia-sky mixing spray into unit, heat exchange unit and denitration unit, tower body bottom and set ash bucket and unloading valve, tower body top
Portion sets net gas outlet；The tower body lower part side of the dust separation unit is equipped with multiple air inlets, and each air inlet passes through respectively
Winding pipe connects one end of flue gas intake stack, and the other end of flue gas intake stack and the desulfurization fume of external desulfurization unit go out
Mouth is connected；It is evenly distributed with deflector and filter bag equipped with air inlet in the tower body of dust separation unit, multiple rows of filter bag is distributed in tower body vertically,
Air inlet is set between filter bag and air inlet and is evenly distributed with deflector, and filter bag top sets pulse spraying equipment, and pulse spraying equipment connection is external
Compressed air tunnel.
The air inlet sets valve respectively.
The ammonia-sky mixing sprays into unit and is made of gas mixer and ammonia-spraying grid, and gas mixer sets the mixing of ammonia sky
Gas entrance, smoke inlet and mixed gas outlet, wherein ammonia sky gaseous mixture entrance connect external ammonia sky mixed gas pipeline road, ammonia
Ammonia-spraying grid is set on the inside of empty gaseous mixture entrance；Smoke inlet is set to gas mixer bottom；Mixed gas outlet is set to gas
The top of mixer.
The heat exchange unit is made of the horizontally disposed heat-exchanging tube bundle of multiple rows of multiple row, forms every heat exchanger tube of heat-exchanging tube bundle
Periphery is equipped with radiated rib, and the heat transferring medium entrance of heat-exchanging tube bundle connects dry coke quenching high-temperature gas conveyance conduit, heat-exchanging tube bundle
Heat transferring medium outlet by vapor return pipeline connect dry coke quenching residual heat boiler.
The denitration unit is made of N+1 layers of denitrating catalyst, and wherein N layers is work denitration catalyst oxidant layer, and one layer is
Spare denitration catalyst oxidant layer；Denitration unit sets sound wave ash cleaner.
Compared with prior art, the utility model has the beneficial effects that：
1) dust separation unit uses Bag filter flue gas, can ensure the high removal rate of dust, and can be very good
Adapt to the fluctuation situation of dust in flue gas, qualified discharge；
2) the valvular air inlet of multiple bands is used, airflow uniform distribution is conducive to, crushing reduces；
3) setting air inlet is evenly distributed with deflector, effectively dust is avoided directly to wash away filter bag, plays protection well to filter bag and makees
With extending the service life of filter bag；
4) ammonia-sky mixing sprays into the structure type that unit uses ammonia-spraying grid, on the basis of ensureing that ammonia sprays into uniform,
It can realize that ammonia is rapidly and uniformly mixed with flue gas；
5) heat exchange unit uses the structure type with radiated rib heat-exchanging tube bundle, effective improving heat exchanging efficiency to increase flue gas
Residence time ensures catalytic reaction temperature, and plays the role of uniformly distributed air-flow；
6) it uses dry coke quenching high-temperature flue gas as heat transferring medium, can effectively promote flue-gas temperature to catalyst reaction temperature
Degree realizes the efficient utilization of the extra high-temperature flue gas of dry coke quenching, substantially reduces engineering cost；
7) denitration unit uses the structure type of N+1, it is ensured that common denitration catalyst can be used in denitration persistent high efficiency
Agent effectively reduces operating cost.
8) it uses sound wave ash cleaner that can ensure the connectivity of denitrating catalyst hole, plays the long-term of denitrating catalyst
Efficient catalytic acts on.
Description of the drawings
Fig. 1 is a kind of front view of middle low-temperature flue gas de-dusting de-nitration integrated described in the utility model.
Fig. 2 is the A direction views in Fig. 1.
In figure：1. 2. ammonia of dust separation unit-sky mixing spray into 3. heat exchange unit of unit, 4. denitration unit, 5. ash bucket 6. into
7. air inlet of air port is evenly distributed with 11. heat-exchanging tube bundle of deflector 8. filter bag, 9. pulse spraying equipment, 10. gas mixer, 12. denitrating catalyst
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
As shown in Figure 1 and Figure 2, a kind of middle low-temperature flue gas de-dusting de-nitration integrated described in the utility model, including under
The supreme dust separation unit 1 being successively set in a tower body, ammonia-sky mixing spray into unit 2, heat exchange unit 3 and denitration list
Member 4, tower body bottom set ash bucket 5 and unloading valve, net gas outlet are set at the top of tower body；The tower body lower part of the dust separation unit 1
Side is equipped with multiple air inlets 6, and each air inlet 6 connects one end of flue gas intake stack, flue gas air inlet by winding pipe respectively
The other end of pipeline is connected with the desulfurization fume outlet of external desulfurization unit；It is equal that air inlet is equipped in the tower body of dust separation unit 1
Cloth deflector 7 and filter bag 8, multiple rows of filter bag 8 are distributed in tower body vertically, and air inlet is set between filter bag 8 and air inlet 6 and is evenly distributed with deflector
7,8 top of filter bag sets pulse spraying equipment 9, and pulse spraying equipment 9 connects external compression airflow pipe.
The air inlet 6 sets valve respectively.
The ammonia-sky mixing sprays into unit 2 and is made of gas mixer 10 and ammonia-spraying grid, and gas mixer 10 sets ammonia sky
Gaseous mixture entrance, smoke inlet and mixed gas outlet, wherein ammonia sky gaseous mixture entrance connect external ammonia sky mixed gas pipeline
Road sets ammonia-spraying grid on the inside of ammonia sky gaseous mixture entrance；Smoke inlet is set to 10 bottom of gas mixer；Mixed gas outlet is set
In the top of gas mixer 10.
The heat exchange unit 3 is made of the horizontally disposed heat-exchanging tube bundle of multiple rows of multiple row 11, every of composition heat-exchanging tube bundle 11
Heat exchanger tube periphery is equipped with radiated rib, and the heat transferring medium entrance of heat-exchanging tube bundle 11 connects dry coke quenching high-temperature gas conveyance conduit,
The heat transferring medium outlet of heat-exchanging tube bundle 11 connects dry coke quenching residual heat boiler by vapor return pipeline.
The denitration unit 4 is made of N+1 layers of denitrating catalyst 12, and wherein N layers is work denitration catalyst oxidant layer, one layer
For spare denitration catalyst oxidant layer；Denitration unit sets sound wave ash cleaner.
Middle low-temperature flue gas dedusting denitrification integral method based on device described in the utility model is as follows, coke oven production process
The stack gases of middle generation are after desulfurization unit desulfurization, under the swabbing action of wind turbine, entered by one or more air inlets 6
In dust separation unit 1, after air inlet is evenly distributed with deflector 7 uniformly, the high removal efficiency of dust is realized under the effect of filter bag 8；It has removed
The flue gas of dust sprays into unit 2 by ammonia-air gas mixture and flue gas during flowing up, by ammonia-sky mixing
Quick uniform mixes, and then exchanges heat with dry coke quenching high-temperature gas in heat exchange unit 3, so that flue-gas temperature is reached denitrating catalyst anti-
It answers temperature, last flue gas to enter in denitration unit 4, realizes the efficient removal of NOx in flue gas, purified gas is at the top of tower body
Discharge.
Exhaust gas dust such as after desulfurization unit is up to standard, then can cancel dust separation unit 1, flue gas directly into
Enter ammonia-sky mixing and sprays into unit 2.
When 8 resistance of filter bag in dust separation unit 1 is excessive, unbalanced pulse blowing device 9 carries out deashing to filter bag 8,
Ensure the long-term effective use of filter bag 8.
It is passed through dry coke quenching high-temperature gas in the heat-exchanging tube bundle 11 of heat exchange unit 3, the gas after heat exchange is connected to dry coke quenching waste heat
Boiler is used for UTILIZATION OF VESIDUAL HEAT IN and turbine generator.
N+1 layers of 12 installation site of denitrating catalyst are reserved in denitration unit 4, and N layers of denitrating catalyst 12 are arranged when newly-started,
When NOx occurs exceeded in net gas, new denitrating catalyst 12 is placed in remaining 1 layer；When NOx surpasses again in net gas
When mark, the lowest level of the N first placed layers denitrating catalyst 12 is taken out and is replaced, is only needed in order when occurring exceeded every time later
Denitrating catalyst 12 is taken out to replacement successively.
When denitration unit 4 detects that pressure drag is increased to preset value, open sound wave ash cleaner, to denitrating catalyst 12 into
Row cleaning, ensures the long-acting efficient of denitrating catalyst 12.
A kind of middle low-temperature flue gas de-dusting de-nitration integrated described in the utility model can not only realize that dry coke quenching is extra
High-temperature gas makes full use of, and the spies such as, dedusting denitration efficiency high, service life length low, simple in structure with cost of investment
Point, dust and NOx in capable of purifying very well in low-temperature flue gas realize qualified discharge.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (5)
1. a kind of middle low-temperature flue gas de-dusting de-nitration integrated, which is characterized in that including being successively set on one from bottom to top
Dust separation unit, ammonia-sky mixing in tower body sprays into unit, heat exchange unit and denitration unit, tower body bottom and sets ash bucket and unload
Grey valve, tower body top set net gas outlet；The tower body lower part side of the dust separation unit is equipped with multiple air inlets, each to enter the wind
Mouth connects one end of flue gas intake stack, the other end of flue gas intake stack and external desulfurization unit by winding pipe respectively
Desulfurization fume outlet is connected；It is evenly distributed with deflector and filter bag equipped with air inlet in the tower body of dust separation unit, multiple rows of filter bag is equal vertically
Cloth sets air inlet in tower body, between filter bag and air inlet and is evenly distributed with deflector, and filter bag top sets pulse spraying equipment, pulse jet dress
Set connection external compression airflow pipe.
2. a kind of middle low-temperature flue gas de-dusting de-nitration integrated according to claim 1, which is characterized in that the air inlet
Mouth sets valve respectively.
3. a kind of middle low-temperature flue gas de-dusting de-nitration integrated according to claim 1, which is characterized in that the ammonia-
Sky mixing sprays into unit and is made of gas mixer and ammonia-spraying grid, and gas mixer sets ammonia sky gaseous mixture entrance, smoke inlet
And mixed gas outlet, wherein ammonia sky gaseous mixture entrance connect external ammonia sky mixed gas pipeline road, ammonia sky gaseous mixture entrance
Inside sets ammonia-spraying grid；Smoke inlet is set to gas mixer bottom；Mixed gas outlet is set to the top of gas mixer.
4. a kind of middle low-temperature flue gas de-dusting de-nitration integrated according to claim 1, which is characterized in that the heat exchange
Unit is made of the horizontally disposed heat-exchanging tube bundle of multiple rows of multiple row, and every heat exchanger tube periphery for forming heat-exchanging tube bundle is equipped with cooling fin
The heat transferring medium entrance of piece, heat-exchanging tube bundle connects dry coke quenching high-temperature gas conveyance conduit, and the heat transferring medium outlet of heat-exchanging tube bundle is logical
Cross vapor return pipeline connection dry coke quenching residual heat boiler.
5. a kind of middle low-temperature flue gas de-dusting de-nitration integrated according to claim 1, which is characterized in that the denitration
Unit is made of N+1 layers of denitrating catalyst, and wherein N layers is work denitration catalyst oxidant layer, and one layer is spare denitration catalyst oxidant layer；
Denitration unit sets sound wave ash cleaner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721813016.XU CN207734844U (en) | 2017-12-22 | 2017-12-22 | A kind of middle low-temperature flue gas de-dusting de-nitration integrated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721813016.XU CN207734844U (en) | 2017-12-22 | 2017-12-22 | A kind of middle low-temperature flue gas de-dusting de-nitration integrated |
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| CN207734844U true CN207734844U (en) | 2018-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107890776A (en) * | 2017-12-22 | 2018-04-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of middle low-temperature flue gas de-dusting de-nitration integrated and method |
| CN109432934A (en) * | 2018-12-30 | 2019-03-08 | 福建龙净环保股份有限公司 | A kind of gas cleaning integrated system and aluminium oxide calcining process system |
-
2017
- 2017-12-22 CN CN201721813016.XU patent/CN207734844U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107890776A (en) * | 2017-12-22 | 2018-04-10 | 中冶焦耐(大连)工程技术有限公司 | A kind of middle low-temperature flue gas de-dusting de-nitration integrated and method |
| CN109432934A (en) * | 2018-12-30 | 2019-03-08 | 福建龙净环保股份有限公司 | A kind of gas cleaning integrated system and aluminium oxide calcining process system |
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