CN218688139U - Dust removal denitration integrated device - Google Patents
Dust removal denitration integrated device Download PDFInfo
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- CN218688139U CN218688139U CN202222808991.9U CN202222808991U CN218688139U CN 218688139 U CN218688139 U CN 218688139U CN 202222808991 U CN202222808991 U CN 202222808991U CN 218688139 U CN218688139 U CN 218688139U
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Abstract
The utility model belongs to the technical field of the dust removal denitrification facility, in particular to dust removal denitrification integrated device. The utility model comprises a supporting frame, wherein the upper part of the supporting frame is provided with a dust remover, and the lower part of the supporting frame is provided with a plurality of denitration reactors; one side of dust remover sets up dust remover entry flue, and the dust remover export flue is connected to the opposite side of dust remover, and the other end of dust remover export flue is connected with denitration entry flue, and denitration entry flue communicates with a plurality of denitration reactors respectively, is provided with in dust remover export flue or the denitration entry flue and spouts the ammonia system, is provided with the denitration catalyst in the denitration reactor, and the exit end of denitration reactor sets up denitration export flue, and denitration export flue is connected with the draught fan. The utility model provides a floor area is little, do not influence the normal maintenance of sack cleaner sack and change, do not increase the degree of difficulty of dust remover shell design, can set up the dust removal denitration integrated device of the catalyst number of piles in a flexible way simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the dust removal denitrification facility, in particular to dust removal denitrification integrated device.
Background
As the power industry and the ferrous metallurgy industry start the work of ultralow emission of smoke pollutants in turn, china is building the most clean industrial production system and the conventional atmospheric pollutants (such as SO) all over the world 2 、NO X Particulate matter), all perform very stringent standards. In the common ultra-low emission technical route of flue gas pollutants, a combination of desulfurization, denitrification and dedusting technologies is generally adopted. In the power industry, denitration is usually arranged in a boiler area, and dust removal and desulfurization are usually arranged in a boiler rear area, so that the power industry hardly considers the integrated arrangement of denitration and dust removal, but in other industries such as ferrous metallurgy and the like, such as a coking furnace and a coal-fired gas boiler, a dry desulfurization, bag-type dust removal and medium-temperature SCR denitration mode is usually adopted. Meanwhile, because many projects do not reserve enough space for the ultra-low emission equipment of the smoke pollutants in the initial construction stage, when the ultra-low emission reconstruction of the smoke pollutants is carried out, the problem of insufficient reconstruction site is often encountered. Therefore, it is very important to consider the integrated design of dust removal and denitration for some projects with tense sites.
Chinese patent CN215463054U discloses an integration bag collector to biomass boiler flue gas dust removal denitration, arranges the denitration catalyst in the other region of dust remover clean gas room, has realized denitration, dust remover structure integration, still has the denitration catalytic reduction reaction chamber that additionally occupies the place space, and the effect that reduces the place demand is limited.
Chinese patent CN111729509A discloses a high-temperature dedusting and denitration integrated arrangement device for biomass boiler flue gas, wherein a denitration device is arranged right above a dust remover air purification chamber, so that although the occupied space can be saved, when the height of the reserved air purification chamber is insufficient, normal maintenance and replacement of a cloth bag are influenced; when the gas-purifying chamber height of reserving satisfied sack and changed the demand, will arouse denitration, the overall height of dust removal integrated device equipment to pull up, arouse supporting investment cost increase such as support steel framework, and this scheme has increased the design degree of difficulty of dust remover casing.
Chinese patent CN113230849A discloses an integrated device of multi-chamber SCR and catalyst activation for multi-chamber dust remover and its application method, where the catalyst is arranged in the clean flue gas duct between two rows of dust removing chambers, or arranged in the clean flue gas duct right above the two rows of dust removing chambers. The two arrangement modes can realize the integrated arrangement of denitration and dust removal, but the height of a clean flue gas flue between two rows of dust removal chambers of a conventional dust remover is smaller, only 1 layer of catalyst can be installed under the condition of not changing the integral structure of the dust remover, and the denitration efficiency is limited. In another arrangement mode of arranging the catalyst in the clean flue gas flue right above the two rows of dust removal chambers, although a plurality of layers of catalysts can be arranged, the same problem as that in the patent CN111729509A exists.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem that prior art exists, the utility model aims to provide a floor area is little, do not influence the normal maintenance of sack cleaner sack and change, do not increase the degree of difficulty of dust remover casing design, can set up the dust removal denitration integrated device of the catalyst number of piles simultaneously in a flexible way.
The utility model discloses the technical scheme who adopts does:
a dedusting and denitration integrated device comprises a support frame, wherein a deduster is arranged at the upper part of the support frame, and a plurality of denitration reactors are arranged at the lower part of the support frame; one side of dust remover sets up dust remover entry flue, and dust remover export flue is connected to the opposite side of dust remover, and the other end of dust remover export flue is connected with denitration entry flue, denitration entry flue respectively with a plurality of denitration reactors intercommunication, be provided with in dust remover exit flue or the denitration entry flue and spout the ammonia system, be provided with the denitration catalyst in the denitration reactor, the exit end of denitration reactor sets up denitration export flue, denitration export flue is connected with the draught fan.
The utility model discloses set up denitration reactor and draught fan in the dust remover below, do not additionally occupy the place, reducible system area. The dust remover sets up in denitration reactor top, can not influence the normal maintenance and the change of sack cleaner sack, and does not increase the degree of difficulty of dust remover casing design. The number of layers of the denitration catalyst can be set to be multiple, and different denitration efficiency requirements can be met.
As the utility model discloses an optimal scheme, dust remover export flue contains horizontal segment flue and the vertical section flue that communicates each other, and the exit linkage of horizontal segment flue and dust remover, vertical section flue and denitration entry flue are connected. The flue gas gets into vertical section flue by the horizontal segment flue after the dust remover removes dust, reentrants denitration entry flue.
As the preferred scheme of the utility model, the ammonia injection system is arranged in the vertical section flue of the outlet flue of the dust remover. The denitration reducing agent provided by the denitration reducing agent storage and supply system is sprayed into the vertical section flue through the ammonia spraying system and is fully mixed with the flue gas.
As the utility model discloses an optimal scheme, spout the ammonia system and including introducing the pipeline, the other end of introducing the pipeline is connected with a plurality of grid formulas and spouts the ammonia pipe, and a plurality of grid formulas are spouted the ammonia pipe and are arranged in vertical section flue. The ammonia spraying system adopts a grid type ammonia spraying pipe, the number of ammonia spraying points is increased, and the uniformity of the ammonia nitrogen molar ratio is improved.
As the utility model discloses an optimal scheme, when the quantity of denitration reactor is two at least, be provided with denitration entry baffle in the denitration entry flue. Set up 1 denitration entry baffle in every denitration entry flue, a plurality of denitration entry baffles keep opening entirely in normal operating. When the unilateral catalyst or the draught fan needs to be overhauled and replaced on line in the low-load stage, the denitration inlet baffle on the overhauling side is kept closed, other denitration inlet baffles are kept fully opened, and the flue gas only passes through the unilateral denitration reactor and the draught fan to realize unilateral overhauling and maintenance.
As the preferred scheme of the utility model, the junction of dust remover export flue and denitration entry flue is provided with the guide plate. Guide plates are arranged at the corners of the outlet flue of the dust remover and the denitration inlet flue, so that the uniformity of a flow field is improved.
As the preferred proposal of the utility model, the dust remover is a cloth bag dust remover.
The utility model has the advantages that:
the utility model discloses a dust remover sets up in denitration reactor top, does not additionally occupy the place, and the system accounts for the ground area can reduce more than 30%, does not influence the normal maintenance of sack cleaner sack and change, does not increase the degree of difficulty of dust remover casing design, can set up the catalyst number of piles in a flexible way simultaneously in order to satisfy different denitration efficiency requirements.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a left side view of the present invention;
fig. 3 is a top view of a part of the structure of the present invention.
In the figure: 1-inlet flue of dust remover; 2-a dust remover; 3-outlet flue of dust remover; 4-a denitration inlet baffle; 5-denitration inlet flue; 6-ammonia injection system; 7-a denitration reactor; 8-a denitration catalyst; 9-denitration outlet flue; 10-a draught fan; 11-a support frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1 to 3, the dust removal and denitration integrated device of the present embodiment includes a support frame 11, a dust remover 2 is installed on the upper portion of the support frame 11, and a plurality of denitration reactors 7 are installed on the lower portion of the support frame 11; dust remover 2's one side sets up dust remover entry flue 1, dust remover export flue 3 is connected to dust remover 2's opposite side, dust remover export flue 3's the other end is connected with denitration entry flue 5, denitration entry flue 5 communicates with a plurality of denitration reactor 7 respectively, be provided with in dust remover exit flue 3 or the denitration entry flue 5 and spout ammonia system 6, be provided with the denitration catalyst in the denitration reactor 7, the exit end of denitration reactor 7 sets up denitration export flue 9, denitration export flue 9 is connected with draught fan 10. The dust remover 2 is a bag-type dust remover 2.
The ammonia injection system 6 is arranged in the vertical section flue of the outlet flue 3 of the dust remover. The denitration reducing agent provided by the denitration reducing agent storage and supply system is sprayed into the vertical section flue through the ammonia spraying system 6 and is fully mixed with the flue gas. The ammonia injection system 6 comprises an introducing pipeline, the other end of the introducing pipeline is connected with a plurality of grid type ammonia injection pipes, and the grid type ammonia injection pipes are arranged in the vertical section flue. The ammonia spraying system 6 adopts a grid type ammonia spraying pipe, the number of ammonia spraying points is increased, and the uniformity of ammonia nitrogen molar ratio is improved.
The design of 7 cross sectional dimensions of denitration reactor satisfies the catalyst velocity of flow requirement, accords with 11 intervals of support frame simultaneously and sets up. NO in the flue gas under the action of the denitration catalyst 8 X And the denitration catalyst reacts with a denitration reducing agent to generate nitrogen and water, and the number of layers of the denitration catalyst 8 can be designed according to the requirement of the denitration efficiency of the project. The denitration reactor 7 and the induced draft fan 10 are arranged below the dust remover 2, and the denitrated clean flue gas enters a chimney to be discharged after being pressurized by the induced draft fan 10.
The utility model discloses set up denitration reactor 7 and draught fan 10 in 2 below of dust remover, do not additionally occupy the place, reducible system area. The dust remover 2 is arranged above the denitration reactor 7, so that the normal maintenance and replacement of the cloth bag dust remover 2 can not be influenced, and the difficulty of the design of the shell of the dust remover 2 is not increased. 8 layers of the denitration catalyst can be arranged in multiple layers, and different denitration efficiency requirements can be met.
The dust remover outlet flue 3 comprises a horizontal section flue and a vertical section flue which are communicated with each other, the horizontal section flue is connected with an outlet of the dust remover 2, and the vertical section flue is connected with the denitration inlet flue 5. After the flue gas is dedusted by the deduster 2, the flue gas enters the vertical section flue from the horizontal section flue and then enters the denitration inlet flue 5.
When the number of denitration reactors 7 is at least two, be provided with denitration inlet baffle 4 in the denitration inlet flue 5. Set up 1 denitration entry baffle 4 in every denitration entry flue 5, a plurality of denitration entry baffles 4 keep opening fully during normal operating. When the unilateral catalyst or the draught fan 10 needs to be overhauled and replaced on line in the low-load stage, the denitration inlet baffle 4 on the overhauling side is kept closed, other denitration inlet baffles 4 are kept fully opened, and the flue gas only passes through the unilateral denitration reactor 7 and the draught fan 10, so that unilateral overhauling and maintenance are realized.
Furthermore, a guide plate is arranged at the joint of the dust remover outlet flue 3 and the denitration inlet flue 5. Guide plates are arranged at the corners of the dust remover outlet flue 3 and the denitration inlet flue 5, so that the uniformity of a flow field is improved.
Example (b):
taking a modification project of ultralow emission of flue gas pollutants of a certain coking furnace as an example, the flue gas volume of the coking furnace is 400000Nm 3 And h (standard wet state), after the raw flue gas is led out from the flue of the coke oven, dry desulfurization is carried out, and the desulfurized flue gas enters a dedusting-denitration system. As shown in figure 1, the desulfurized flue gas enters a dust remover 2 through a dust remover inlet flue 1, and the floor space of the dust remover 2 is 18.6m in length and 17.3m in width. The spacing of the supporting frames 11 of the steel structure in the length direction is 6.2m, and the spacing in the width direction is 6.8m, 3.7m and 6.8m. After the particulate matters in the flue gas are removed in the dust remover 2 and meet the particulate matter ultra-low emission standardThe dust remover outlet flue 3 connects out, and dust remover outlet flue 3 contains 2 export horizontal segment flues of dust remover and decurrent vertical segment flues, and 3 bottoms in the dust remover outlet flue divide into two denitration entry flues 5 to both sides, and denitration entry flue 5 connects dust remover outlet flue 3 and denitration reactor 7. Denitration reactor 7 sets up 2, and the cross sectional dimension is width 5.8m x height 4.1m, and the symmetrical arrangement is in 2 ash buckets of dust remover below. Set up 1 denitration entry baffle 4 in every denitration entry flue 5, 2 denitration entry baffles 4 keep opening fully during normal operating, and the low-load stage needs overhaul on line, when changing unilateral catalyst or draught fan 10, and the denitration entry baffle 4 of maintenance side keeps closing, and the denitration entry baffle 4 of opposite side keeps opening fully, and the flue gas only passes through unilateral denitration reactor 7 and draught fan 10, realizes unilateral maintenance, maintenance. A plurality of expansion joints are arranged on the dust remover inlet flue 1, the dust remover outlet flue 3, the denitration reactor 7 and the denitration outlet flue 9.
Denitration reductant that denitration reductant storage and supply system provided is spouted into denitration system through spouting ammonia system 6 and is mixed with the flue gas, spouts ammonia system 6 and sets up in dust remover export flue 3, spouts ammonia system 6 and adopts grid formula to spout ammonia pipe and increase and spout ammonia point quantity, improves ammonia nitrogen mole ratio homogeneity. The guide plates are arranged at the corners of the dust remover outlet flue 3 and the denitration inlet flue 5, so that the uniformity of a flow field is further improved. Denitration catalyst 8 sets up in denitration reactor 7, and the flue gas flows horizontally in denitration reactor 7, and the 8 layers of denitration catalyst design according to 2+1 layers, 2 layers of first dress promptly, reserve 1 layer of space, and under denitration catalyst 8's effect, NOX and denitration reductant reaction in the flue gas generate nitrogen and water. 2 draught fans 10 set up in dust remover 2 below equally, and denitration outlet flue 9 connects denitration reactor 7 and draught fan 10, and the flue gas that satisfies the ultralow emission requirement of NOx after the denitration gets into the chimney and discharges after draught fan 10 pressure boost.
The utility model provides a dust removal denitration integrated device can save SCR deNOx systems and draught fan 10 area of land in arranging, reduces 32% to the demand that reforms transform the place, is applicable to very much and reforms transform the nervous project in place.
The utility model discloses in using, 1 can only be established to denitration reactor 7, and when only establishing 1 denitration reactor 7, denitration entry baffle 4 can not set up. The induced draft fan 10 may be provided only 1 and may be arranged outside the dust collector 2.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (7)
1. The utility model provides a dust removal denitration integrated device which characterized in that: the denitration device comprises a support frame (11), wherein a dust remover (2) is arranged on the upper part of the support frame (11), and a plurality of denitration reactors (7) are arranged on the lower part of the support frame (11); one side of dust remover (2) sets up dust remover entry flue (1), dust remover export flue (3) are connected to the opposite side of dust remover (2), the other end of dust remover export flue (3) is connected with denitration entry flue (5), denitration entry flue (5) communicate with a plurality of denitration reactors (7) respectively, be provided with in dust remover export flue (3) or denitration entry flue (5) and spout ammonia system (6), be provided with the denitration catalyst in denitration reactor (7), the exit end of denitration reactor (7) sets up denitration export flue (9), denitration export flue (9) are connected with draught fan (10).
2. The integrated dedusting and denitration device of claim 1, which is characterized in that: dust remover outlet flue (3) contain the horizontal segment flue and the vertical section flue of intercommunication each other, and the exit linkage of horizontal segment flue and dust remover (2), vertical section flue and denitration entry flue (5) are connected.
3. The integrated dedusting and denitration device of claim 2, is characterized in that: and the ammonia injection system (6) is arranged in a vertical section flue of the outlet flue (3) of the dust remover.
4. The integrated dedusting and denitration device of claim 3, is characterized in that: the ammonia spraying system (6) comprises an introducing pipeline, the other end of the introducing pipeline is connected with a plurality of grid type ammonia spraying pipes, and the grid type ammonia spraying pipes are arranged in a vertical section flue.
5. The integrated dedusting and denitration device of claim 1, which is characterized in that: when the number of the denitration reactors (7) is at least two, a denitration inlet baffle (4) is arranged in the denitration inlet flue (5).
6. The integrated dedusting and denitration device of claim 1, which is characterized in that: and a guide plate is arranged at the joint of the dust remover outlet flue (3) and the denitration inlet flue (5).
7. The integrated dedusting and denitration device of any one of claims 1 to 6, wherein: the dust remover (2) is a bag-type dust remover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222808991.9U CN218688139U (en) | 2022-10-25 | 2022-10-25 | Dust removal denitration integrated device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222808991.9U CN218688139U (en) | 2022-10-25 | 2022-10-25 | Dust removal denitration integrated device |
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| CN218688139U true CN218688139U (en) | 2023-03-24 |
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| CN202222808991.9U Active CN218688139U (en) | 2022-10-25 | 2022-10-25 | Dust removal denitration integrated device |
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- 2022-10-25 CN CN202222808991.9U patent/CN218688139U/en active Active
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