CN201755450U - Dry type desulfurating, mist spraying and moisture increasing apparatus - Google Patents
Dry type desulfurating, mist spraying and moisture increasing apparatus Download PDFInfo
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- CN201755450U CN201755450U CN2010201536418U CN201020153641U CN201755450U CN 201755450 U CN201755450 U CN 201755450U CN 2010201536418 U CN2010201536418 U CN 2010201536418U CN 201020153641 U CN201020153641 U CN 201020153641U CN 201755450 U CN201755450 U CN 201755450U
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Abstract
The utility model relates to the technical field of fire coal and exhaust gas purification, in particular to a dry type desulfurating, mist spraying and moisture increasing apparatus. The front part of the entrance of the desulfurating tower of the utility model is provided with a section of vertically arranged pre-moistening funnel wherein a mist-spraying nozzle is provided. The mist-spraying nozzle is connected respectively with a water pump and an air compressor through a water flow adjusting apparatus and an air adjusting apparatus, which are controlled by a controller. The input portion of the signal detection of the controller is connected with a thermocouple arranged at the smoke and gas expelling port. A set of monolayer spray nozzles are arranged close to the smoke and gas entrance in the dry type desulfurating tower whose spraying directions are identical to the smoke and gas flowing directions. The spray plums from the different spray nozzles do not overlap with each other and the distances between a peripheral nozzle and the tower wall are greater than the semi-diameter of the spray plums of the spray nozzles. According to tests and experiments as well as relevant numerical simulation analysis, it is suggested that the apparatus of the utility model achieves better temperature cooling and moistening effects and at the same time, effectively prevents walls from getting wet and from forming scale as well.
Description
Technical field
The utility model relates to the purification techniques of coal-fired flue-gas, specifically is a kind of dry type desulfurizing spray-type humidifier.
Background technology
The spray humidification method has very large influence to the dry flue gas desulphurization effect, in flue gas cool-down, humidification process, takes place between flue gas and the droplet to conduct heat and mass transfer, and the flue gas heat release, the droplet evaporation is to the activation highly significant of dry calcium-based desulfurizing agent.If but humidification is improper, be easy to cause wet wall and scale formation, and then cause the increase of desulphurization system resistance, accelerated corrosion, influence system's continous-stable operation, even the safety that threatens boiler.Realize good cooling, humidification, need to adopt suitable spray humidification method and arrangement of nozzles.
In dry flue gas desulphurization system (as the system of Japanese NFK company), after the high speed flue gas enters reaction tower from a side, because effect of inertia, form eddy current " stagnant area " at the opposite side of reaction tower.And along with the rising of flue gas stream in reaction tower, the flue gas water content in the stagnant area is more and more higher, and flue-gas temperature is then more and more lower, until above reaction tower near or reach capacity.
Cause wet wall to mainly contain the reason of two aspects: the reaction tower wall that the flue gas behind (1) humidification and temperature are lower contacts, and reaches capacity the dewfall wall that wets at the reaction tower inwall; (2) because the obvious heat of smoke after the cooling reduces, and the evaporation driving force reduces, at the desulphurization reaction of design in the time, the droplet carburation by evaporation that also is not able to do in time carries down at eddy current, collides in the reaction tower inwall and wet wall.Existing spray humidification method still can't reach the effect of being satisfied with overcoming wet wall aspect fouling.
Summary of the invention
Technical problem to be solved in the utility model is, provides that a kind of humidifying cooling is effective, is difficult for the dry type desulfurizing spray-type humidifier of wet wall and fouling in the reaction tower.
Device of the present utility model includes a dry type desulfurizing tower, and the dry type desulfurizing top of tower is a smoke inlet, and dry type desulfurizing tower one side is provided with exhanst gas outlet; Connect one section vertical pre-humidification flue before the inlet of described dry type desulfurizing tower, in pre-humidification flue, be provided with atomizer, the water-quantity regulating device that passes through of atomizer is connected with air compressor machine with water pump respectively with conditioner, described water-quantity regulating device and conditioner are controlled by a controller, and the detection signal importation of controller is connected with the thermocouple that is positioned at exhanst gas outlet; Be provided with the injection direction one group individual layer nozzle identical with the flow of flue gas direction near the smoke inlet place in the dry type desulfurizing tower, the nozzle of the mist plumage radius non-overlapping of each nozzle and periphery and the distance of tower wall are greater than the mist plumage radius of nozzle.
Through experiment test and numerical simulation analysis, prove that device of the present utility model has good cooling, humidification effect, its effect that overcomes wet wall and fouling significantly improves simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the distribution schematic diagram of individual layer nozzle mist plumage in the desulfurizing tower;
Fig. 3 be the utility model in implementation process 5 meters, nozzle bottom along the temperature profile at desulfurizing tower center.
The specific embodiment
As shown in Figure 1, device of the present utility model includes a dry type desulfurizing tower 1, and the dry type desulfurizing top of tower is a smoke inlet, and dry type desulfurizing tower one side is provided with exhanst gas outlet; Connect one section vertical pre-humidification flue 2 before the inlet of described dry type desulfurizing tower, in pre-humidification flue, be provided with atomizer 3, the water-quantity regulating device 5 that passes through of atomizer is connected with air compressor machine 8 with water pump 7 respectively with conditioner 6, described water-quantity regulating device 5 and conditioner 6 are controlled by a controller 9, and the detection signal importation of controller 9 is connected with the thermocouple 10 that is positioned at exhanst gas outlet; Be provided with the nozzle 4 of the injection direction one group individual layer identical with the flow of flue gas direction in dry type desulfurizing tower 1 near the smoke inlet place, the nozzle of the mist plumage A non-overlapping of nozzle and periphery and the distance of tower wall are greater than the mist plumage radius of nozzle.
Spray humidification method of the present utility model is: on the said apparatus basis, before flue gas enters desulfurizing tower, spray into water smoke by atomizer in pre-humidification flue and fall wet humidification, the injection direction of nozzle becomes 30 ° of angles with flue gas flow direction.Because this section flue cigarette temperature is higher, the water smoke atomization condition is good, and the carburation by evaporation condition is good, the reduction flue-gas temperature that can gasify at short notice, and flue-gas temperature drops to 90 ℃ (being higher than 35 ℃ of dew points) from high temperature (under 130 ℃).Because the flue gas flow rate in the flue is very fast, and erosive wear is serious, the liner of flue adopts the material with very strong antiseptic property simultaneously, and inner wall smooth is even wet ash also is difficult for sticking wall.The nozzle of individual layer is arranged in the porch of reaction tower, and the jet expansion direction is identical with the flow of flue gas direction, uses a plurality of low discharge nozzles.Flue-gas temperature drops to 75 ℃ from 90 ℃.Arrangement of nozzles should reduce overlapping as far as possible.Because flue gas flow velocity in reaction tower is lower, have only 4m/s, for preventing wet wall, with the wall adjacent nozzles, the distance of itself and wall should be a bit larger tham mist plumage radius.
As shown in Figure 3 be said apparatus and method in actual moving process, 5 meters, nozzle bottom are along the temperature profile at reaction tower center, the result of experiment test and numerical simulation analysis meets well.Measured result shows that flue-gas temperature is up to 80 ℃, and lowest part reaches 75 ℃.From figure, excursion is ± 2.5 ℃.Show that the utility model has humidifying cooling effect preferably.
Claims (1)
1. dry type desulfurizing spray-type humidifier, include a dry type desulfurizing tower, the dry type desulfurizing top of tower is a smoke inlet, dry type desulfurizing tower one side is provided with exhanst gas outlet, it is characterized in that: connect one section vertical pre-humidification flue (2) before the inlet of described dry type desulfurizing tower (1), in pre-humidification flue (2), be provided with atomizer (3), the water-quantity regulating device (5) that passes through of atomizer (3) is connected with air compressor machine (8) with water pump (7) respectively with conditioner (6), described water-quantity regulating device (5) and conditioner (6) are controlled by a controller (9), and the detection signal importation of controller (9) is connected with the thermocouple that is positioned at exhanst gas outlet (10); Be provided with the injection direction one group individual layer nozzle (4) identical with the flow of flue gas direction near the smoke inlet place in dry type desulfurizing tower (1), the nozzle of the mist plumage non-overlapping of each nozzle and periphery and the distance of tower wall are greater than the mist plumage radius of nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201536418U CN201755450U (en) | 2010-04-09 | 2010-04-09 | Dry type desulfurating, mist spraying and moisture increasing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201536418U CN201755450U (en) | 2010-04-09 | 2010-04-09 | Dry type desulfurating, mist spraying and moisture increasing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201755450U true CN201755450U (en) | 2011-03-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201536418U Expired - Fee Related CN201755450U (en) | 2010-04-09 | 2010-04-09 | Dry type desulfurating, mist spraying and moisture increasing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201755450U (en) |
-
2010
- 2010-04-09 CN CN2010201536418U patent/CN201755450U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110309 Termination date: 20130409 |