CN104307630A - Continuous spraying washing and humidifying system and process of vertical flow wet type electric precipitator - Google Patents
Continuous spraying washing and humidifying system and process of vertical flow wet type electric precipitator Download PDFInfo
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- CN104307630A CN104307630A CN201410567810.5A CN201410567810A CN104307630A CN 104307630 A CN104307630 A CN 104307630A CN 201410567810 A CN201410567810 A CN 201410567810A CN 104307630 A CN104307630 A CN 104307630A
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Abstract
The invention relates to a continuous spraying washing and humidifying system of a vertical flow wet type electric precipitator. A flue gas inlet of the vertical flow wet type electric precipitator is provided with a spraying layer; the spraying direction of the spraying layer is opposite to a flue gas direction; an impactor is further arranged at the position which is closer to an electric field when being compared with the spraying layer; the impactor comprises a cone located at the center and the direction of the conical head is arranged towards the flue gas inlet; upper triangular cones and lower triangular cones are uniformly distributed at the periphery of the cone in the radial direction at intervals; an impaction region is formed by two sector-shaped grids composed of the adjacent two lower triangular cones and the middle upper triangular cone; and the spraying layer is communicated with an external water source by a water supplying pipeline. The continuous spraying washing and humidifying system of the vertical flow wet type electric precipitator has the advantages that a polar plate is completely washed, the electric field is stable, the dust removing efficiency is high and the flue gas uniform distribution is good.
Description
Technical field
The present invention relates to a kind of vertical current wet electrical dust precipitator spray continuously rinse with humidification system and technique, belong to wet-esp technical field.
Background technology
Wet electrical dust precipitator adopts the modes such as water spray or overflow water to make dust collecting electrode surface form water membrane, by the electric cleaner that the dust of heavy collection on pole plate washes away.Wet type deashing can be avoided having trapped flying upward again of dust, reaches very high efficiency of dust collection.Because of without rapping apparatus, run also more reliable.And in current domestic air, fine particle exceeds standard, thermal power plant's " gypsum rain " phenomenon is serious, wet electrical dust precipitator solves the strong weapon of problems just.
Wet electrical dust precipitator can be divided into hori-zontal flue gas to flow to and vertical flue gas flow direction according to flue gas flow direction, is called for short horizontal flow and vertical current.At present, the flushing of general wet electrical dust precipitator inside is mainly the spray irrigation at electric field top.When pole plate height constantly increases, the flush efficiency of single spray irrigation is more and more lower, and especially rinsing not exclusively often appears in pole plate middle and lower part, causes the phenomenon of electric field instability.And the smoke moisture, flue gas even distribution etc. that enter electric field also play vital effect to efficiency of dust collection.Seeking a kind of more excellent electric field backwashing manner is the important research direction significantly promoting wet electrical dust precipitator performance.
Summary of the invention
The technical issues that need to address of the present invention are: existing wet electrical dust precipitator, and the flush efficiency of single spray irrigation is more and more lower, and especially rinsing not exclusively often appears in pole plate middle and lower part, cause electric field unstable; The humidity entering the flue gas of electric field is inadequate and uneven, and flue gas even distribution is low; Positive plate cleaning performance is not good, and cleaning does not thoroughly cause positive plate out-of-flatness, affects dust removing effects.
The present invention takes following technical scheme:
A kind of vertical current wet electrical dust precipitator is sprayed continuously and is rinsed and humidification system, it is characterized in that: the smoke inlet place of described vertical current wet electrical dust precipitator is provided with spraying layer 1, and the direction that described spraying layer 1 is sprayed is relative with flue gas direction; Comparatively spraying layer 1 is also provided with ram 2 closer to the position of electric field, described ram 2 comprises the cone 230 being positioned at center, vertebra head direction is towards smoke inlet, cone 230 uniformly to be dispersed to surrounding, alternately arrange upper triangle centrum 210, lower triangle centrum 220, and two fan-shaped lattice that adjacent two lower triangular pyramids 220 and middle upper triangular pyramids 210 form are an impingement region; Described spraying layer 1 is communicated with external water source by water supply line 5.
The feature of the technical program is: for vertical current wet electrical dust precipitator, on the basis of prior art " spray ", add the technological means of " spraying " and " shock ", spraying layer 1 is arranged on the position of smoke inlet, spray direction is relative with flue gas direction, when flue gas enters electric field from bottom to top, spraying layer 1 is arranged on below electric field, when flue gas enters electric field from top to bottom, spraying layer 1 is arranged on above electric field, in positive plate, bottom produces self-cleaning current, is conducive to the cleaning of pole plate; Adopt the ram 2 of special construction, be conducive to smoke particles condensation water smoke and produce multiple impact, the two kinds of percussion flows produced through ram facilitate microcosmic mixing, make the further condensation growth of fine particle, are easy to fine particle and remove in the electric field;
Further, described spraying layer 1 is supported by uniform beam 1 ', and uniform beam 1 ' carries out uniform by the distribution of its mesh-density to flue gas, and smoke density higher position uniform beam 1 ' density is also higher.
Further, described smoke inlet is positioned at below electric field, corresponding, spraying layer 1 is also positioned at the below of electric field.
Further, described smoke inlet is positioned at above electric field, corresponding, spraying layer 1 is also positioned at the top of electric field.
Further, described spraying layer 1 comprises nozzle 110, spray pipe 120, and described nozzle 110 is arranged in parallel, and the spread of spray of its immediate four nozzles of spread of spray of each nozzle is mutually overlapping, spraying coverage rate > 100%; Described spray pipe 120 is made up of spraying supervisor 121 and nozzle arm 122; Spray pipe 120 takes straight tube to supply water or reducer pipe supplies water.
Further, the spraying supervisor of described spraying layer 1 is a logical or two-way version, that is, series of spray nozzles is arranged in one or two face on a supervisor.
Further, the spraying supervisor of described spraying layer 1 is three-port structure form, that is, series of spray nozzles is arranged in three faces on a supervisor.
Further, described uniform beam (1 ') is made up of orthogonal uniform board (110 '); Exhanst gas outlet direction level, towards exhanst gas outlet direction, the distribution equalizing structure entirety that uniform beam (1 ') and spraying layer 1 form is from sparse to dense; Spray pipe 120 as spraying water pipe, also as equal stringing; Uniform beam is flue gas even distribution structure, also as the brace summer of spray pipe; Uniform beam and spray pipe interlaced arrangement, collaborative work.
Further, described uniform board 110 ' is totally three kinds of specifications: slotless uniform board, sulculus uniform board, vat uniform board, and slotless uniform board is only as distribution equalizing structure; Sulculus uniform board is simultaneously as the brace summer of nozzle arm 122; Vat uniform board is simultaneously as the brace summer of spraying supervisor 121.
A kind of above-mentioned vertical current wet electrical dust precipitator is sprayed continuously and is rinsed the method for work with humidification system, the self-wetted electric cleaner entrance of flue gas enters, flow forward is continued after uniform, mix with the saturated steam of spraying continuously is reverse, flue gas is humidified and reaches hypersaturated state, the subparticle condensation growth in flue gas; Supersaturation flue gas continues to be divided into multiply through ram 2 forward subsequently, in the fan-shaped impingement region of two lattice that two adjacent lower triangular pyramids 220 and middle upper triangular pyramids 210 form, two strands of flue gases occur to concentrate collision through water conservancy diversion, occur again to clash into around flue gas to surrounding diffusion through one flue gas of cone 230, the two kinds of percussion flows produced through ram facilitate microcosmic mixing, make the further condensation growth of fine particle, be easy to fine particle and remove in the electric field; To carry through flue gas through the water droplets of nozzle 110 and enter electric field and be collected on positive plate, in positive plate, bottom produces self-cleaning current, is conducive to the cleaning of pole plate; Discharge from outlet after gas cleaning.
Beneficial effect of the present invention is:
1) pole plate rinses completely, and electric field is stablized.Before continuous spraying humidification system is arranged in smoke inlet, spray direction and Gas phase Smoke pair, to carry through flue gas through the water droplets of spray nozzle and enter electric field and be collected on positive plate, in positive plate, bottom produces self-cleaning current, be conducive to the cleaning of pole plate, avoid because pole plate rinses the pole plate out-of-flatness thoroughly do not caused, improve the stability of electric field.
2) efficiency of dust collection is high.In the present invention, spray nozzle is arranged in parallel, the spread of spray that the spread of spray of each nozzle and its plane four direction are close to nozzle is mutually overlapping, spraying coverage rate > 100%, the supersaturation water steam that continuous spraying produces there will be steam phase transforming, promote that subparticle is grown up, be easy to remove in the electric field.Flue gas is after spray humidification, continue to be divided into multiply through ram forward, in the fan-shaped impingement region of two lattice that two adjacent lower triangular pyramids and middle upper triangular pyramids form, two strands of flue gases occur to concentrate collision through water conservancy diversion, occur again to clash into around flue gas to surrounding diffusion through one flue gas of cone, the two kinds of percussion flows produced through ram facilitate microcosmic mixing, make the further condensation growth of fine particle, are easy to fine particle and remove in the electric field.
3) flue gas even distribution is good.Uniform beam of the present invention is made up of orthogonal uniform board; Towards exhanst gas outlet direction, the distribution equalizing structure entirety that uniform beam and spraying layer form from sparse to dense, ensures the uniform property of flue gas; Spray pipe, as spraying water pipe, also can be used as equal stringing; Uniform beam is flue gas even distribution structure, also can be used as the brace summer of spray pipe; Uniform beam and spray pipe interlaced arrangement, collaborative work, improves utilization rate of equipment and installations.
Accompanying drawing explanation
Fig. 1 be the vertical current wet electrical dust precipitator in embodiment one spray continuously rinse with humidification system artwork.
Fig. 2 is spraying layer spray pipe and arrangement of nozzles figure.
Fig. 3 is the schematic diagram to spray in Fig. 2 layer spray pipe and nozzle spray scope.
Fig. 4 is the structure chart of ram.
Fig. 5-a is the structural representation of upper triangular pyramids in ram.
Fig. 5-b is the structural representation of lower triangle centrum in ram.
Fig. 5-c is the structural representation of cone in ram.
Fig. 6 is another kind of uniform spray pipe and arrangement of nozzles figure.
Fig. 7-a is the structural representation of slotless uniform board.
Fig. 7-b is the structural representation of sulculus uniform board.
Fig. 7-c is the structural representation of vat uniform board.
Fig. 8 be the vertical current wet electrical dust precipitator in embodiment two spray continuously rinse with humidification system artwork.
In figure, 1-sprays layer; 110-nozzle; 120-spray pipe; 121-sprays supervisor; 122-nozzle arm; 1 '-uniform beam; 110 '-uniform board; 111 '-slotless uniform board; 112 '-sulculus uniform board; 113 '-vat uniform board; 2-ram; The fan-shaped lattice of 201-; The upper triangular pyramids of 210-; Triangular pyramids under 220-; 230-cone; 3-technique water tank; 4-technique water pump; 5-water supply line; 6-gas approach; 7-exhanst gas outlet.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the present invention is further described.
Embodiment (one):
See Fig. 1,6, a kind of vertical current wet electrical dust precipitator is sprayed continuously and is rinsed and humidification system, comprises humidification system of spraying continuously, technique water tank 3, technique water pump 4, water supply line 5.The wet electrical dust precipitator of this system can be arranged in desulfurizing tower inner upper.Continuous spray humid tower is by layer 1 of spraying, uniform fine strain of millet 1 ', and ram 2 forms;
See Fig. 4,5-a, 5-b, 5-c, Fig. 4 is ram structure chart, and ram 2 is made up of triangular pyramids under triangular pyramids on polylith 210, polylith 220 and a cone 230; Upper triangular pyramids 210 is identical with lower triangular pyramids 220 structure, but towards the opposite; Two fan-shaped lattice 201 that adjacent two lower triangular pyramids form with middle upper triangular pyramids are an impingement region; Thick lower narrow on cone 230.
Be uniform beam 1 ', spraying layer 1 structure see Fig. 6, Fig. 6, uniform beam 1 ' is made up of orthogonal uniform board; Towards exhanst gas outlet direction, the distribution equalizing structure entirety that uniform beam 1 ' and spraying layer 1 form from sparse to dense, ensures the uniform property of flue gas; Spray pipe 120, as spraying water pipe, also can be used as equal stringing; Uniform beam 1 ', as flue gas even distribution structure, also can be used as the brace summer of spray pipe; Uniform beam and spray pipe interlaced arrangement, collaborative work, improves utilization rate of equipment and installations, and the spraying supervisor of spraying layer 1 is three-port structure form, that is, series of spray nozzles is arranged in three faces on a supervisor.
See Fig. 7-a, 7-b, 7-c, uniform board 110 ' is totally three kinds of specifications: slotless uniform board 111 ', sulculus uniform board 112 ', vat uniform board 113 '.Slotless uniform board 111 ' is only as distribution equalizing structure; Sulculus uniform board 112 ' can be nozzle arm brace summer; Vat uniform board 113 ' can be spraying supervisor brace summer.
Concrete technology is: the self-wetted electric cleaner entrance 6 of flue gas enters, after uniform, continue flow forward, and mix with the saturated steam of spraying continuously is reverse, flue gas is humidified and reaches hypersaturated state, the subparticle condensation growth in flue gas.Supersaturation flue gas continues to be divided into multiply through ram forward subsequently, in the fan-shaped impingement region of two lattice that two adjacent lower triangular pyramids and middle upper triangular pyramids form, two strands of flue gases occur to concentrate collision through water conservancy diversion, occur again to clash into around flue gas to surrounding diffusion through one flue gas of cone, the two kinds of percussion flows produced through ram facilitate microcosmic mixing, make the further condensation growth of fine particle, be easy to fine particle and remove in the electric field.To carry through flue gas through the water droplets of spray nozzle and enter electric field and be collected on positive plate, in positive plate, bottom produces self-cleaning current, be conducive to the cleaning of pole plate, avoid because pole plate rinses the pole plate out-of-flatness thoroughly do not caused, improve the stability of electric field.Discharge from outlet 7 after gas cleaning.
Embodiment (two):
As shown in Figure 8.From embodiment one difference, the present embodiment is that flue gas flow direction is different, embodiment one is that flue gas flows from bottom to top, and embodiment two flows from top to bottom for flue gas flow direction, and cone is slightly gone up narrow 230 times, and wet electrical dust precipitator can be arranged in outside desulfurizing tower.
Embodiment (three):
The present embodiment and the difference of embodiment one be the to spray structure of layer 1 is different, and does not arrange uniform beam 1 '.
See Fig. 1-Fig. 3, the spraying supervisor of spraying layer 1 is a logical or two-way version, that is, series of spray nozzles is arranged in one or two face on a supervisor.
See Fig. 2-Fig. 3, spraying layer 1 comprises spray nozzle 110, spray pipe 120; Spray nozzle 110 is arranged in parallel, and spread of spray and its four spread of sprays being close to nozzle of each nozzle are mutually overlapping, and 100% < spraying coverage rate < 200%, nozzle adopts solid-cone (type) nozzle.The supersaturation water steam that continuous spraying produces there will be steam phase transforming, promotes that subparticle is grown up, is easy to remove in the electric field.Spray pipe 120 is made up of spraying supervisor 121 and nozzle arm 122; When longer needed for spray pipe, reducer pipe can be adopted, shown in Fig. 2; When deduster is less, spray pipe takes straight tube to supply water.
Claims (10)
1. vertical current wet electrical dust precipitator is sprayed continuously and is rinsed and a humidification system, it is characterized in that:
The smoke inlet place of described vertical current wet electrical dust precipitator is provided with spraying layer (1), and the direction that described spraying layer (1) is sprayed is relative with flue gas direction;
Layer (1) of comparatively spraying also is provided with ram (2) closer to the position of electric field, described ram (2) comprises the cone (230) being positioned at center, vertebra head direction is towards smoke inlet, cone (230) uniformly to be dispersed to surrounding, alternately arrange upper triangle centrum (210), lower triangle centrum (220), and two fan-shaped lattice that adjacent two lower triangular pyramids (220) form with middle upper triangular pyramids (210) are an impingement region;
Described spraying layer (1) is communicated with external water source by water supply line (5).
2. vertical current wet electrical dust precipitator as claimed in claim 1 is sprayed continuously and is rinsed and humidification system, it is characterized in that: described spraying layer (1) is supported by uniform beam (1 '), uniform beam (1 ') is carried out uniform by the distribution of its mesh-density to flue gas, and smoke density higher position uniform beam (1 ') density is also higher.(note: this technical scheme is a kind of preferred version for Fig. 6, and exclusive rights 1 comprise Fig. 2 and Fig. 6 two kinds of forms).
3. vertical current wet electrical dust precipitator as claimed in claim 1 or 2 is sprayed continuously and is rinsed and humidification system, it is characterized in that: described smoke inlet is positioned at below electric field, corresponding, spraying layer (1) is also positioned at the below of electric field.
4. vertical current wet electrical dust precipitator as claimed in claim 1 or 2 is sprayed continuously and is rinsed and humidification system, it is characterized in that: described smoke inlet is positioned at above electric field, corresponding, spraying layer (1) is also positioned at the top of electric field.
5. vertical current wet electrical dust precipitator as claimed in claim 1 or 2 is sprayed continuously and is rinsed and humidification system, it is characterized in that: described spraying layer (1) comprises nozzle (110), spray pipe (120), described nozzle (110) is arranged in parallel, the spread of spray of its immediate four nozzles of spread of spray of each nozzle is mutually overlapping, spraying coverage rate > 100%; Described spray pipe (120) is made up of spraying supervisor (121) and nozzle arm (122); Spray pipe (120) takes straight tube to supply water or reducer pipe supplies water.
6. vertical current wet electrical dust precipitator as claimed in claim 1 is sprayed continuously and is rinsed and humidification system, it is characterized in that: the spraying supervisor of described spraying layer (1) is a logical or two-way version, that is, series of spray nozzles is arranged in one or two face on a supervisor.
7. vertical current wet electrical dust precipitator as claimed in claim 2 is sprayed continuously and is rinsed and humidification system, it is characterized in that: the spraying supervisor of described spraying layer (1) is three-port structure form, that is, series of spray nozzles is arranged in three faces on a supervisor.
8. vertical current wet electrical dust precipitator as claimed in claim 2 is sprayed continuously and is rinsed and humidification system, it is characterized in that: described uniform beam (1 ') is made up of orthogonal uniform board (110 '); Exhanst gas outlet direction level, towards exhanst gas outlet direction, the distribution equalizing structure entirety that uniform beam (1 ') and spraying layer (1) form is from sparse to dense; Spray pipe (120) as spraying water pipe, also as equal stringing; Uniform beam is flue gas even distribution structure, also as the brace summer of spray pipe; Uniform beam and spray pipe interlaced arrangement, collaborative work.
9. vertical current wet electrical dust precipitator as claimed in claim 8 is sprayed continuously and is rinsed and humidification system, it is characterized in that: described uniform board (110 ') is totally three kinds of specifications: slotless uniform board, sulculus uniform board, vat uniform board, slotless uniform board is only as distribution equalizing structure; Sulculus uniform board is simultaneously as the brace summer of nozzle arm (122); Vat uniform board is simultaneously as the brace summer of spraying supervisor (121).
10. the vertical current wet electrical dust precipitator of power described in 1 is sprayed continuously and is rinsed the method for work with humidification system, it is characterized in that:
The self-wetted electric cleaner entrance of flue gas enters, after uniform, continue flow forward, and mix with the saturated steam of spraying continuously is reverse, flue gas is humidified and reaches hypersaturated state, the subparticle condensation growth in flue gas; Supersaturation flue gas continues to be divided into multiply through ram (2) forward subsequently, in the fan-shaped impingement region of two lattice that two adjacent lower triangular pyramids (220) and middle upper triangular pyramids (210) form, two strands of flue gases occur to concentrate collision through water conservancy diversion, occur again to clash into around flue gas to surrounding diffusion through one flue gas of cone (230), the two kinds of percussion flows produced through ram facilitate microcosmic mixing, make the further condensation growth of fine particle, be easy to fine particle and remove in the electric field; To carry through flue gas through the water droplets of nozzle (110) and enter electric field and be collected on positive plate, in positive plate, bottom produces self-cleaning current, is conducive to the cleaning of pole plate; Discharge from outlet after gas cleaning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410567810.5A CN104307630B (en) | 2014-10-23 | 2014-10-23 | A kind of vertical current wet electrical dust precipitator is sprayed continuously and is rinsed and humidification system and technique |
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| CN201410567810.5A CN104307630B (en) | 2014-10-23 | 2014-10-23 | A kind of vertical current wet electrical dust precipitator is sprayed continuously and is rinsed and humidification system and technique |
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| CN104307630A true CN104307630A (en) | 2015-01-28 |
| CN104307630B CN104307630B (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113522012A (en) * | 2020-04-15 | 2021-10-22 | 中国石油化工股份有限公司 | Flue gas denitration ammonia injection mixing system, static mixer thereof and ammonia injection control method |
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| CN104307630B (en) | 2016-07-06 |
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