CN211837163U - Dual cycle SOx/NOx control dust removal integrated device - Google Patents
Dual cycle SOx/NOx control dust removal integrated device Download PDFInfo
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- CN211837163U CN211837163U CN202020270667.4U CN202020270667U CN211837163U CN 211837163 U CN211837163 U CN 211837163U CN 202020270667 U CN202020270667 U CN 202020270667U CN 211837163 U CN211837163 U CN 211837163U
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- flue gas
- dust removal
- cooling
- desulfurization
- dust remover
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Abstract
The utility model provides a dual cycle SOx/NOx control dust removal integrated device to cooling dust remover and sedimentation tank are first circulation, use the absorption tower as the second circulation, two circulation cooperations, strengthen the effect of SOx/NOx control dust removal, the process flow is short, area is little, investment cost is low, add the desulfurizer in the spray liquid of first circulation, to after the sack dust removal or the flue gas that dust content is lower carry out main desulfurization and dust removal, desulfurization efficiency more than 90%, dust removal rate more than 60%, the process pressure who has reduced the desulfurization of second circulation and dust removal; in addition, the flue gas is cooled in the first circulating spraying process, favorable conditions are created for subsequent denitration reaction, the movement path of the flue gas is planned to be in a continuous shape like the Chinese character 'ji' through a plurality of isolation barriers, the dust removal, desulfuration and cooling effects of the cooling dust remover are enhanced, the dust removal rate of the integrated device is more than 96%, the desulfuration rate is more than 99%, and the denitration rate is more than 95%.
Description
Technical Field
The utility model relates to a field that the flue gas was handled especially relates to a flow is short, with low costs dual cycle desulfurization, denitration, dust removal integrated device.
Background
With the increasing environmental protection requirements of the state, the emission standards of industrial enterprises are continuously improved. In the industrial pollutant emission, the flue gas accounts for most of the proportion. The desulfurization, denitration and dust removal of the flue gas are important links of flue gas treatment. The theoretical and technical researches on flue gas desulfurization, denitration and dust removal have been in history for decades, and it can be said that the related theoretical and technical reserves are quite mature. However, in the actual use process, it is often difficult to consider the flow, cost and removal effect.
The prior art provides more integrated processes of desulfurization, denitration and dust removal, and the aim is to ensure the removal effect on the basis of controlling the cost and simplifying the process, but the actual situation is that the process is complex and the removal efficiency is not obvious enough, in order to meet the emission standard, the process flow is not effectively shortened, and further, the process cost is difficult to control, so that the flue gas treatment cost of enterprises is higher.
In order to solve the problem, the utility model provides a short, the low-cost dual cycle desulfurization of flow, denitration, dust removal integrated device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dual cycle desulfurization, denitration, dust removal integrated device to solve prior art integration desorption device process flow long, with high costs, the not good technical problem of desorption effect.
The utility model provides a pair of dual cycle SOx/NOx control dust removal integrated device, include: cooling dust remover, sedimentation tank, absorption tower, wherein:
the cooling deduster is provided with a flue gas inlet and a water outlet, the bottom of the cooling deduster is a slope surface which gradually inclines downwards from one side of the flue gas inlet to the side opposite to the flue gas inlet, water is arranged at the bottom of the cooling deduster, the water surface is positioned below the flue gas inlet and above the water outlet, the top of the cooling deduster is provided with a first spraying device for spraying a desulfurizer solution, and the water outlet is connected with a sedimentation tank;
more than 3 isolation barriers vertical to the smoke entering direction are arranged in the cooling dust remover, the isolation barriers are hermetically connected with the top and the bottom of the cooling dust remover and one of the two side walls of the cooling dust remover, so that a smoke passing channel is formed between the isolation barriers and the other side wall, and the isolation barriers are sequentially connected with one of the two side walls along the smoke entering direction and are alternately arranged in the cooling dust remover;
a flue gas outlet is formed in one side wall of the cooling dust remover and is connected with a gas inlet of an absorption tower, a cyclone, a second spraying device, a demister and a tube bundle dust remover are sequentially arranged in the absorption tower from bottom to top, and the second spraying device sprays a desulfurization and denitrification complexing agent solution.
The first circulation is formed by the cooling dust remover and the sedimentation tank, the integrated absorption tower is used as the second circulation, the two circulations are matched, the effects of desulfurization, denitrification and dust removal can be enhanced, the process flow is short, the equipment is small, the occupied area is small, the investment cost is low, and particularly, the design of the cooling dust remover in the first circulation is used for removing dust by cloth bags or flue gas with low dust content (lower than 100 mg/m)3) After being sent into cooling dust remover, because the top continuously sprays, the dust is caught and falls the bottom of cooling dust remover along with water by water, and partly dust can fall to the bottom of cooling dust remover along with water, and after remaining dust clashed the isolation barrier, most especially large granule dust can be desorption under inertia, and then is washed away to the bottom of cooling dust remover under the effect that sprays, and the top spraysThe isolation barrier can effectively remove dust in the flue gas, and the dust removal efficiency reaches more than 60%; meanwhile, a desulfurizer is added into the spray liquid, main desulfurization can be carried out in the first cycle, the desulfurization efficiency reaches over 90 percent, the process pressure of desulfurization and dust removal in the subsequent second cycle is reduced, and the desulfurization and denitrification complexing agent is saved; in addition, the flue gas is cooled in the spraying process, favorable conditions are created for subsequent denitration reaction, the movement path of the flue gas is planned to be a continuous zigzag shape through a plurality of isolation barriers, the effects of dedusting, desulfuration and cooling of the cooling deduster are further enhanced, and through the matching of two cycles, the dedusting rate is more than 96%, the desulfuration rate is more than 99%, and the denitration rate is more than 95%.
The flue gas outlet and the water outlet are arranged at positions which are only required to be ensured to be positioned above the water surface of the cooling dust remover and the water outlet is positioned below the water surface, and are specifically arranged on a certain side wall, the arrangement can be designed according to the actual production condition, as a non-limiting illustration, under the condition that the structure and the design are allowed, the flue gas outlet is arranged on the side wall close to one side of the absorption tower, and the water outlet is arranged on the side wall close to one side of the sedimentation tank, so that the occupied area is reduced, the materials are saved, and the cost is reduced.
As a non-limiting description, the width of the isolation barrier is greater than the width of the channel, so that an overlapping area in space can be ensured to exist between adjacent isolation barriers, thereby enabling a path of flue gas entering the cooling dust remover to be better limited, and enhancing the effects of cooling, dust removal and desulfurization.
Further, the dual cycle SOx/NOx control dust removal integrated device still includes first spray pump, and the sedimentation tank links to each other with first spray set through first spray pump, gets back to first spray set through the water pump of first spray pump in with the sedimentation tank, realizes the cyclic utilization of water resource, in addition, because the during operation normal water meeting natural loss, consequently, the preferred setting sets up to the sedimentation tank and sets up automatic water supply device, and is concrete, and automatic water supply device can be for the ball-cock assembly.
Further, dual cycle SOx/NOx control dust removal integrated device still includes first storage tank, and first storage tank is connected with first pump that sprays through first measuring pump, is equipped with the desulfurizer in the first storage tank, in first spray set course of operation, through setting up first measuring pump to the desulfurizer of giving into in the bypass of first pump of spraying quantitatively, realizes automatic ratio and the control of spray set in-process desulfurizer, and as non-limiting description, the desulfurizer can select for the NaOH solution, and its reaction equation is:
and (3) desulfurization reaction: 2NaOH + SO2→Na2SO3+H2O；
Oxidation reaction in a sedimentation tank: na (Na)2SO3+1/2O2→Na2SO4。
Furthermore, a diversion trench is arranged below the air inlet of the absorption tower, the diversion trench is connected with a second spraying device through a second spraying pump, and the flue gas outlet is connected to the air inlet of the absorption tower through the diversion trench; liquid after spraying in the absorption tower falls to the guiding gutter, gets back to the second spray set through the second pump that sprays, realizes the cyclic utilization of water resource, in addition, because the during operation normal water can the natural loss, consequently, preferred setting up to the guiding gutter sets up automatic water supply device, and is concrete, automatic water supply device can be for the ball-cock assembly.
Furthermore, the dual-cycle desulfurization, denitrification and dust removal integrated device further comprises a second storage tank, the second storage tank is connected with a second spray pump through a second metering pump, and a complexing agent for desulfurization and denitrification is filled in the second storage tank. In the working process of the second spraying device, a complexing agent is added into the spraying liquid for desulfurization and denitrification, the second metering pump is arranged for quantitatively feeding the materials into a bypass of the second spraying pump, the automatic proportioning and control of the desulfurization and denitrification complexing agent in the spraying process are realized, and the desulfurization and denitrification complexing agent can be selected from sodium chlorite NaClO as non-limiting description2And sodium hypochlorite NaClO, and the specific reaction equation is as follows:
and (3) carrying out denitration reaction on the complexing agent: 2NO +
+
+H2O→2
+2
+2
；
Desulfurization reaction of the complexing agent: 3SO2+
+
+3H2O→3
+2
+6
。
Furthermore, the flue gas inlet is close to the side wall connected with the first isolation barrier, so that the flue gas just enters the cooling dust remover and needs to turn, the path of the flue gas flowing through the cooling dust remover is increased, and the effects of desulfurization, dust removal and cooling are enhanced.
Furthermore, the flue gas outlet is arranged on the side wall connected with the last isolation barrier, so that the flue gas still needs to turn after flowing out through the last channel, the path of the flue gas flowing through the cooling dust remover is increased, and the effects of desulfurization, dust removal and cooling are enhanced.
Furthermore, the delivery port setting of cooling dust remover is on the lateral wall of exhanst gas outlet offside to the bottom of cooling dust remover is the domatic of following exhanst gas outlet one side to delivery port one side downward sloping gradually, like this, guarantee that the bottom of cooling dust remover both by the domatic of flue gas entry to its offside downward sloping gradually, again by the domatic of exhanst gas outlet one side to delivery port one side downward sloping gradually, guarantee that the hydroenergy after spraying can in time pass through delivery port discharge to the sedimentation tank, as non-restrictive description, the delivery port is located the lowest of cooling dust remover bottom.
The utility model discloses a two circulation SOx/NOx control dust collector constitutes first circulation through cooling dust remover and sedimentation tank, with the absorption tower of integral type as the second circulation, two circulation cooperations can strengthen the effect that SOx/NOx control was removed dust to, process flow is short, and equipment is less, area is little, and investment cost is low, especially the design of cooling dust remover in the first circulation, through the lower flue gas of sack dust removal or dust content (be less than 100 mg/m)3) After the dust is sent into the cooling dust remover, the dust is captured by water and falls to the bottom of the cooling dust remover along with the water due to continuous spraying at the top, part of the dust can fall to the bottom of the cooling dust remover along with the water, and most of the dust, especially large-particle dust, can be removed under inertia after the rest of the dust collides with the isolation barrier, and then is washed to the bottom of the cooling dust remover under the action of spraying, so that the dust in the flue gas can be effectively removed by the top spraying and isolation barrier, and the dust removal efficiency reaches more than 60%; meanwhile, a desulfurizer is added into the spray liquid, main desulfurization can be carried out in the first cycle, the desulfurization efficiency reaches over 90 percent, and the process pressure of subsequent second cycle desulfurization and dust removal is reduced; in addition, the flue gas is cooled in the spraying process, favorable conditions are created for subsequent denitration reaction, the movement path of the flue gas is planned to be a continuous zigzag shape through a plurality of isolation barriers, the effects of dedusting, desulfuration and cooling of the cooling deduster are further enhanced, and through the matching of two cycles, the dedusting rate is more than 96%, the desulfuration rate is more than 99%, and the denitration rate is more than 95%.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a process flow diagram of a dual-cycle desulfurization, denitrification and dust removal integrated device provided by one embodiment of the present invention;
FIG. 2 is a schematic top view of the desuperheater of FIG. 1;
FIG. 3 is a schematic side view of the desuperheater of FIG. 1;
the dashed line with arrows in fig. 1 is the path of movement of the flue gas.
Reference numerals:
1-a draught fan; 2-a cooling deduster; 3-a sedimentation tank; 4-a first spraying device; 5-a first spray pump; 6-a first metering pump; 7-a first storage tank; 8-an absorption tower; 9-a flow guide groove; 10-a cyclone; 11-a second spraying device; 12-a demister; 13-a tube bundle dust remover; 14 a second spray pump; 15-a second metering pump; 16-a second reservoir; 17-flue gas inlet; 18-an isolation barrier; 19-a flue gas outlet; and 20-water outlet.
Detailed Description
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
FIG. 1 is a process flow diagram of a dual-cycle desulfurization, denitrification and dust removal integrated device provided by one embodiment of the present invention; FIG. 2 is a schematic top view of the desuperheater of FIG. 1; FIG. 3 is a schematic side view of the desuperheater of FIG. 1; the dashed line with arrows in fig. 1 is the path of movement of the flue gas.
Example 1
As shown in fig. 1-3, the dual-cycle desulfurization, denitrification and dust removal integrated device provided in this embodiment includes: cooling dust remover 2, sedimentation tank 3, absorption tower 8, wherein:
removing dust with cloth bag or smoke with low dust content (less than 100 mg/m)3) Is sent to a dust removal cooler 2 by an induced draft fan 1;
the cooling dust remover 2 is provided with a flue gas inlet 17, a water outlet 20 and a flue gas outlet 19, the bottom of the cooling dust remover 2 is a slope surface which is gradually inclined downwards from one side of the flue gas inlet 17 to one side opposite to the flue gas inlet 17, water is arranged at the bottom of the cooling dust remover 2, the water surface is positioned below the flue gas inlet 17 and the flue gas outlet 19 and above the water outlet 20, the top of the cooling dust remover 2 is provided with a first spraying device 4 for spraying a desulfurizer NaOH solution, the water outlet 20 is arranged on the side wall close to one side of the sedimentation tank 3, the water outlet 20 is connected with the sedimentation tank 3, the flue gas outlet 19 is arranged on the side wall close to one side of the absorption tower 8, and the flue;
the dual-cycle desulfurization, denitrification and dust removal integrated device further comprises a first spray pump 5, a first metering pump 6 and a first storage tank 7, the sedimentation tank 3 is connected with the first spray device 4 through the first spray pump 5, the first spray pump 5 is used for pumping water in the sedimentation tank 3 back to the first spray device 4, and the sedimentation tank 3 is provided with a first ball float valve for automatically controlling water supplement; the first storage tank 7 is connected with a bypass branch pipe of the first spray pump 5 through the first metering pump 6, a desulfurizer NaOH solution is arranged in the first storage tank 7, the desulfurizer is quantitatively fed into the first spray pump 5 through the first metering pump 6, the automatic proportioning and control of the desulfurizer in the spray process are realized, and the following reactions occur in the spray process:
and (3) desulfurization reaction: 2NaOH + SO2→Na2SO3+H2O；
And the desulfurized liquid enters a sedimentation tank 3 to react as follows:
and (3) oxidation reaction: na (Na)2SO3+1/2O2→Na2SO4；
3 isolation barriers 18 vertical to the smoke entering direction are arranged in the cooling dust remover 2, the isolation barriers 18 are hermetically connected with the top and the bottom of the cooling dust remover 2 and one of the two side walls of the cooling dust remover 2, so that a smoke passing channel is formed between the isolation barriers 18 and the other side wall, and the isolation barriers 18 are sequentially connected with one of the two side walls along the smoke entering direction and are alternately arranged in the cooling dust remover 2; the flue gas inlet 17 is arranged close to the side wall connected with the first isolation barrier, and the flue gas outlet 19 is arranged on the side wall connected with the last isolation barrier;
a diversion trench 9 is arranged below the air inlet of the absorption tower 8, a flue gas outlet 19 is connected with the air inlet of the absorption tower 8 through the diversion trench 9, a cyclone 10, a second spraying device 11, a demister 12 and a tube bundle dust remover 13 are sequentially arranged above the absorption tower 8 from bottom to top, and the diversion trench 9 is connected with the second spraying device 11 through a second spraying pump 14; the liquid sprayed in the absorption tower 8 falls into the diversion trench 9 and is pumped back to the second spraying device 11 through the second spraying pump 14, and a second ball float valve is arranged in the diversion trench 9 and used for automatically controlling water supplement; the dual-cycle desulfurization, denitrification and dust removal integrated device also comprises a second storage tank 16, the second storage tank 16 is connected with a bypass branch pipe of a second spray pump 14 through a second metering pump 15, the second metering pump 15 feeds the desulfurization and denitrification complexing agent quantitatively into the second spray pump 14 to realize automatic proportioning and control of the desulfurization and denitrification complexing agent in the spraying process, and the sodium chlorite NaClO complexing agent for desulfurization and denitrification is filled in the second storage tank 162And sodium hypochlorite NaClO; the chemical reaction in the absorption tower is as follows:
and (3) carrying out denitration reaction on the complexing agent: 2NO +
+
+H2O→2
+2
+2
；
Desulfurization reaction of the complexing agent: 3SO2+
+
+3H2O→3
+2
+6
。
Removing dust with cloth bag or smoke with low dust content (less than 100 mg/m)3) After the draught fan and the dual-cycle desulfurization, denitrification and dust removal integrated device are adopted, main desulfurization and dust removal are carried out through a first cycle of the dust removal cooler and the sedimentation tank, the desulfurization rate reaches over 90%, the dust removal rate reaches over 60%, then the integrated device enters a second cycle of the absorption tower to carry out desulfurization, denitrification and dust removal, after two cycles, the comprehensive desulfurization rate reaches over 99%, the dust removal rate reaches over 96%, and the denitration rate reaches over 95%.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a dual cycle SOx/NOx control dust removal integrated device which characterized in that, dual cycle SOx/NOx control dust removal integrated device includes: cooling dust remover, sedimentation tank, absorption tower, wherein:
the cooling deduster is provided with a flue gas inlet and a water outlet, the bottom of the cooling deduster is a slope surface which gradually inclines downwards from one side of the flue gas inlet to the side opposite to the flue gas inlet, water is arranged at the bottom of the cooling deduster, the water surface is positioned below the flue gas inlet and above the water outlet, the top of the cooling deduster is provided with a first spraying device for spraying a desulfurizer solution, and the water outlet is connected with a sedimentation tank;
more than 3 isolation barriers vertical to the smoke entering direction are arranged in the cooling dust remover, the isolation barriers are hermetically connected with the top and the bottom of the cooling dust remover and one of the two side walls of the cooling dust remover, so that a smoke passing channel is formed between the isolation barriers and the other side wall, and the isolation barriers are sequentially connected with one of the two side walls along the smoke entering direction and are alternately arranged in the cooling dust remover;
a flue gas outlet is formed in one side wall of the cooling dust remover and is connected with a gas inlet of an absorption tower, a cyclone, a second spraying device, a demister and a tube bundle dust remover are sequentially arranged in the absorption tower from bottom to top, and the second spraying device sprays a desulfurization and denitrification complexing agent solution.
2. The integrated device of claim 1, further comprising a first spray pump, wherein the sedimentation tank is connected to the first spray device through the first spray pump.
3. The dual-cycle integrated desulfurization, denitrification and dedusting device as claimed in claim 2, further comprising a first storage tank, wherein the first storage tank is connected with a bypass branch pipe of the first spray pump through a first metering pump, and a desulfurizing agent is filled in the first storage tank.
4. The integrated dual-cycle desulfurization, denitrification and dedusting device as claimed in claim 1, wherein a diversion trench is arranged below the gas inlet of the absorption tower, the diversion trench is connected with the second spraying device through a second spraying pump, and the flue gas outlet is connected to the gas inlet of the absorption tower through the diversion trench.
5. The dual-cycle integrated desulfurization, denitrification and dedusting device according to claim 4, further comprising a second storage tank, wherein the second storage tank is connected with a bypass branch pipe of the second spray pump through a second metering pump, and a desulfurization and denitrification complexing agent is filled in the second storage tank.
6. The integrated dual-cycle desulfurization, denitrification and dedusting device as recited in claim 1, wherein the flue gas inlet is formed near a side wall connected with the first isolation barrier.
7. The integrated device of claim 6, wherein the flue gas outlet is formed in the side wall to which the last isolation barrier is connected.
8. The integrated device for desulfurization, denitrification and dust removal according to any one of claims 1 to 7, wherein the water outlet of the temperature reduction dust remover is arranged on the side wall opposite to the flue gas outlet, and the bottom of the temperature reduction dust remover is a slope which gradually slopes downwards from the flue gas outlet side to the water outlet side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020270667.4U CN211837163U (en) | 2020-03-08 | 2020-03-08 | Dual cycle SOx/NOx control dust removal integrated device |
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|---|---|---|---|
| CN202020270667.4U CN211837163U (en) | 2020-03-08 | 2020-03-08 | Dual cycle SOx/NOx control dust removal integrated device |
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| Publication Number | Publication Date |
|---|---|
| CN211837163U true CN211837163U (en) | 2020-11-03 |
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2020
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