CN105289179A - Low-resistance forced water cooling drip pipe type demister and demisting method - Google Patents
Low-resistance forced water cooling drip pipe type demister and demisting method Download PDFInfo
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- CN105289179A CN105289179A CN201510765874.0A CN201510765874A CN105289179A CN 105289179 A CN105289179 A CN 105289179A CN 201510765874 A CN201510765874 A CN 201510765874A CN 105289179 A CN105289179 A CN 105289179A
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Abstract
The invention discloses a low-resistance forced water cooling drip pipe type demister and demisting method. The demister comprises a drip pipe bundle demisting system arranged on the top of a desulfuration tower and a forced cooling water circulation system used for introducing cooling water into a pipe bundle. The drip pipe bundle demisting system comprises multiple layers of pipe row arrays with water-drop-shaped sections and multiple nozzles achieving upward and downward flushing, wherein the pipe row arrays are arranged in a pipe box in a lattice and staggered mode, and the nozzles are arranged between pipe bundles in a layered and array mode. The forced cooling water circulation system comprises a water storage box, a circulation pump, a water inlet box, a water outlet box and an air cooler. The water storage box is sequentially connected with the circulation pump, the water inlet box, the water outlet box and the air cooler through a circulation pipeline. The demister combines inertial separation with condensation separation, has the significant effect on removing fine particles, has the advantages of being high in demisting and dust removal efficiency, high in cooling efficiency and low in resistance, saving water and the like, and can effectively reduce gypsum rain produced after flue gas desulfurization.
Description
Technical field
The present invention relates to the flue gas demist in wet flue gas desulfurizer, particularly relate to a kind of low-resistance Forced water cooling and drip type tubular demister and defogging method.
Background technology
Along with the aggravation of haze weather, coal-burning utilities is faced with great fume treatment pressure and pollutant control pressure, progressively increases the emission control to combined pollutants such as colloidal solid, fine mist, heavy metal steam in flue gas.Therefore, auxiliary construction demister, improves the sustainable development of demist dedusting technology to coal-burning utilities significant.
Demister utilizes the principles such as inertial separation, centrifugation, sedimentation separation, phase transformation separation to remove the moisture, sulfuric acid, sulfate, the SO that carry in flue gas usually
2and other subparticle, to reduce blocking to follow-up equipment and corrosion, or " gypsum rain " phenomenon preventing the direct discharge of flue gas from causing.Demister common in engineering has Flat defroster, mesh mist eliminator, cyclone demister, tubular demister, electrostatic precipitator etc., and mostly adopts the demister of single type.In demister, the uniformity of flue gas flow field distribution, the factor such as sheet structure, arrangement form, spacing of demister affect performance and the demisting efficiency of demister all to a certain extent, but the demister of single type is difficult to realize the resultant effects such as demisting efficiency is high, developing result good, crushing is little, the demister how development is efficiently easily rinsed under slight drag is an important directions of current demister development.
Summary of the invention
The object of the invention is to solve that traditional demister demist efficiency of dust collection is low, the resistance of flow of flue gas is comparatively large and rinse insufficient problem, provides a kind of low-resistance Forced water cooling to drip type tubular demister and defogging method.
The present invention is achieved through the following technical solutions:
A kind of low-resistance Forced water cooling drips type tubular demister, comprises the water-cooled being arranged in desulfurizing tower top and dripping type tube bank demister system, dripping the forced cooling water circulatory system of type tube bank demister system for cooling water being passed into water-cooled;
The a tube row that the tube bank 1 that is water-drop-shaped by the multilayer dot matrix cross section be staggered in arrangement in bobbin carriage 2 that described water-cooled drips type tube bank demister system is formed;
The described forced cooling water circulatory system comprises storage tank 5, circulating pump 6, inlet water tank 7, water tank 8, air cooler 9; Described storage tank 5 connects air cooler 9, water tank 8, circulating pump 6 and inlet water tank 7 by circulating line 10 successively; The water inlet end of described a tube row is communicated with inlet water tank 7, and water side is communicated with water tank 8.
The top of described tube bank 1 cross section is semicircle, and bottom is half elliptic, and the length of semielliptical semi-minor axis A is semicircular radius R, and major semiaxis B is 2 ~ 3.5 times of semi-minor axis A; Flue gas stream enters from the bottom of bobbin carriage 2, is discharged after a tube row by the top of bobbin carriage 2.
Described water-cooled is dripped type tube bank demister system and is comprised a directed flushing water system of classification for rinsing a tube row.
The directed flushing water system of described classification by multiple with layering and the nozzle 3 of the multiple up and down injection waters of array arrangement in a tube row formed.
The top of described storage tank 5 is provided with water compensating valve, and bottom is provided with blowoff valve.
Be provided with and distributing pipe in described inlet water tank 7, be communicated with the water inlet end of a tube row by distributing pipe.
The defogging method that above-mentioned low-resistance Forced water cooling drips type tubular demister is as follows:
Flue gas enters from the bottom of bobbin carriage 2, streams between a tube row, and flue gas deflection is risen, produce eddy current and change in flow, the continuous deviation of flow trace, a part of subparticle entrained by wet flue gas constantly clashes into the outside wall surface of tube bank 1 under the effect of inertia force, is separated with flue gas;
Meanwhile, circulating pump 6 is by the cooling water press-in inlet water tank 7 in storage tank 5, and cooling water flow to water tank 8 after evenly flowing through tube bank 1, eventually passes air cooler 9 and cools and come back in storage tank 5; Under the effect of cooling water, the wet flue gas carrying subparticle produces condensation in the outside wall surface of tube bank 1, makes part subparticle entrained by flue gas with steam coalescence, is separated with flue gas; Separate out saturation water.
Nozzle 3 timing of the directed flushing water system of classification, compartment of terrain are rinsed and are dripped type tube bank 1, rinse current and take away residual in time and be deposited on the particulate dripped in type tube bank demister system, flow to stock tank bottom desulfurizing tower.
The present invention, relative to prior art, has following advantage and effect:
(1) high-efficiency condensation heat exchange: the present invention adopts the design of the cooling circulating water introducing low temperature in tube bank, and in unit circulation area, the contact area of flue gas and tube bank is larger.Recirculated water flows in tube bank after dispelling the heat in air cooler at a lower temperature again, and heat transfer temperature difference is large, and heat exchange efficiency is high, achieves the efficient coalescence of fine particle in saturated wet flue gas;
(2) high-effective dust-removing demist: the tube bank that dot matrix is staggered in arrangement produces flow-disturbing effect to flue gas.Form eddy current when flue gas flows in the tortuous passageway of interbank alternating contractions and expansion, flue gas deflection is risen, and fine particles constantly clashes into the outside wall surface of tube bank under the effect of inertia force, and effectively increase impact rate, demist efficiency of dust collection is high;
(3) flow of flue gas is even, resistance is little: tube bank has the effect of uniform flue gas, and when making flue gas enter a tube row, Flow Field Distribution is more even, and the local secondary effectively reducing flue gas carries the phenomenon with local detachment effect difference.The tube bank of water-drop-shaped can also reduce the resistance of windward side, reduces separation losses when flue gas walks around tube bank and drag losses;
(4) not easily block fouling: the tube bank of water-drop-shaped has milder radian, the particulate and the slurries that are deposited on tube bundle top and tube bank surface can along the downward landings of curved surfaces, and self-cleaning function is good.The present invention is also provided with the comprehensive flooding nozzle of multiple oriented arrangement, and the flushing water of upper strata pipeline can continue to rinse lower floor's pipeline, and interbank multiply flushing water constantly converges, and effectively solves conventional tubular demister and easily blocks, there is the problem of rinsing dead band.
(5) water-saving result is good: the steam entering air in traditional sulfur removal technology in a large number, by condensation, reclaims, reduces the water consumption of desulphurization system by this system.
Accompanying drawing explanation
Fig. 1 is the schematic side view that low-resistance Forced water cooling of the present invention drips type tubular demister.
Fig. 2 is the tube bundle horizontal schematic cross-section of water-drop-shaped in Fig. 1.
Fig. 3 is the schematic front view that low-resistance Forced water cooling of the present invention drips type tubular demister.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figures 1 to 3.The invention discloses a kind of low-resistance Forced water cooling and drip type tubular demister, comprise the water-cooled being arranged in desulfurizing tower top and dripping type tube bank demister system, dripping the forced cooling water circulatory system of type tube bank demister system for cooling water being passed into water-cooled;
The a tube row that the tube bank 1 that is water-drop-shaped by the multilayer dot matrix cross section be staggered in arrangement in bobbin carriage 2 that described water-cooled drips type tube bank demister system is formed;
The described forced cooling water circulatory system comprises storage tank 5, circulating pump 6, inlet water tank 7, water tank 8, air cooler 9; Described storage tank 5 connects air cooler 9, water tank 8, circulating pump 6 and inlet water tank 7 by circulating line 10 successively; The water inlet end of described a tube row is communicated with inlet water tank 7, and water side is communicated with water tank 8.
The top of described tube bank 1 cross section is semicircle, and bottom is half elliptic, and the length of semielliptical semi-minor axis A is semicircular radius R, and major semiaxis B is 2 ~ 3.5 times of semi-minor axis A; Flue gas stream enters from the bottom of bobbin carriage 2, is discharged after a tube row by the top of bobbin carriage 2.
Described water-cooled is dripped type tube bank demister system and is comprised a directed flushing water system of classification for rinsing a tube row.
The directed flushing water system of described classification by multiple with layering and the nozzle 3 of the multiple up and down injection waters of array arrangement in a tube row formed.
The top of described storage tank 5 is provided with water compensating valve, and bottom is provided with blowoff valve.
Be provided with and distributing pipe in described inlet water tank 7, be communicated with the water inlet end of a tube row by distributing pipe.
Inertial separation and phase transformation separation principle combine by the present invention, allow tube bank 1 internal circulation flow that cooling water is being staggered in arrangement, to realize efficient demist.The flue gas that temperature is higher also exists certain temperature difference with the interior cooling water flowed of tube bank 1, and flue gas is because cooling, and carrying capacity reduces.Some vapor release latent heat, and with the outside wall surface generation coalescence of the subparticle that carries in flue gas in tube bank 1; Flue gas produces turbulent flow with the passage that certain flow rate is narrow, tortuous through between each tube bank 1, and flow velocity and the flow direction of flue gas change, the continuous deviation of flow trace.Droplet and subparticle due to density large, poor to the followability of flue gas, under the effect of inertia force, clash into the outside wall surface of tube bank 1, effectively achieve gas-liquid separation.
The forced cooling water circulatory system, constantly to be sucked the cooling water in storage tank 5 by circulating pump 6 and extrudes.Cooling water flow is in each tube bank 1, and carry out condensing heat-exchange with the outer high-temperature flue gas flowed of tube bank 1, the recirculated water after heat exchange flows out tube bank 1 and enters in air cooler 9, after cooling, again participate in closed cycle heat exchange.This system not only increases cooling effectiveness, also greatly saves process water.
The directed flushing water system of classification of the present invention, by multiple upwards, the downward comprehensive flushing tube bank 1 of nozzle 3.The flushing water that sprays vertically downward impacts to shunting about during tube bank 1 top and rinses downwards along the smooth arc surface of tube wall, and the flushing water vertically upward sprayed continues after rinsing tube bank 1 curved surfaces to rinse downwards under gravity.The flushing water of upper strata pipeline rinses lower floor's pipeline again.The directed flooding nozzle of classification effectively can be removed and remain in dust and dirt in tube bank 1 and slurries, eliminates and rinses dead angle, improve cleannes.
Adopt low-resistance Forced water cooling of the present invention to drip the method for type tubular demister demist, realize by following steps:
Flue gas enters from the bottom of bobbin carriage 2, streams between a tube row, and flue gas deflection is risen, produce eddy current and change in flow, the continuous deviation of flow trace, a part of subparticle entrained by wet flue gas constantly clashes into the outside wall surface of tube bank 1 under the effect of inertia force, is separated with flue gas;
Meanwhile, circulating pump 6 is by the cooling water press-in inlet water tank 7 in storage tank 5, and cooling water flow to water tank 8 after evenly flowing through tube bank 1, eventually passes air cooler 9 and cools and come back in storage tank 5; Under the effect of cooling water, the wet flue gas carrying subparticle produces condensation in the outside wall surface of tube bank 1, makes part subparticle entrained by flue gas with steam coalescence, is separated with flue gas; Separate out saturation water.
The present invention includes an a tube row rinsing step: tube bank 1 is rinsed in nozzle 3 timing, the compartment of terrain of the directed flushing water system of classification, rinse current and take away residual in time and be deposited on the particulate dripped in type tube bank demister system, flow to stock tank bottom desulfurizing tower.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. low-resistance Forced water cooling drips a type tubular demister, it is characterized in that, comprises the water-cooled being arranged in desulfurizing tower top and dripping type tube bank demister system, dripping the forced cooling water circulatory system of type tube bank demister system for cooling water being passed into water-cooled;
The a tube row that the tube bank (1) that is water-drop-shaped by the multilayer dot matrix cross section be staggered in arrangement in bobbin carriage (2) that described water-cooled drips type tube bank demister system is formed;
The described forced cooling water circulatory system comprises storage tank (5), circulating pump (6), inlet water tank (7), water tank (8), air cooler (9); Described storage tank (5) connects air cooler (9), water tank (8), circulating pump (6) and inlet water tank (7) by circulating line (10) successively; The water inlet end of described a tube row is communicated with inlet water tank (7), and water side is communicated with water tank (8).
2. low-resistance Forced water cooling according to claim 1 drips type tubular demister, it is characterized in that, the top of described tube bank (1) cross section is semicircle, bottom is half elliptic, the length of semielliptical semi-minor axis (A) is semicircular radius (R), and major semiaxis (B) is 2 ~ 3.5 times of semi-minor axis (A); Flue gas stream enters from the bottom of bobbin carriage (2), is discharged after a tube row by the top of bobbin carriage (2).
3. low-resistance Forced water cooling according to claim 1 drips type tubular demister, it is characterized in that, described water-cooled is dripped type tube bank demister system and comprised a directed flushing water system of classification for rinsing a tube row.
4. low-resistance Forced water cooling according to claim 3 drips type tubular demister, it is characterized in that, the directed flushing water system of described classification by multiple with layering and the nozzle (3) of the multiple up and down injection waters of array arrangement in a tube row formed.
5. low-resistance Forced water cooling according to any one of claim 1 to 4 drips type tubular demister, it is characterized in that, the top of described storage tank (5) is provided with water compensating valve, and bottom is provided with blowoff valve.
6. low-resistance Forced water cooling according to claim 5 drips type tubular demister, it is characterized in that, described inlet water tank is provided with and distributing pipe in (7), is communicated with the water inlet end of a tube row by distributing pipe.
7. according to any one of claim 1 to 6, low-resistance Forced water cooling drips the defogging method of type tubular demister, it is characterized in that comprising the steps:
Flue gas enters from the bottom of bobbin carriage (2), stream between a tube row, flue gas deflection is risen, produce eddy current and change in flow, the continuous deviation of flow trace, a part of subparticle entrained by wet flue gas constantly clashes into the outside wall surface of tube bank (1) under the effect of inertia force, is separated with flue gas;
Meanwhile, circulating pump (6) is by cooling water press-in inlet water tank (7) in storage tank (5), cooling water flow to water tank (8) after evenly flowing through tube bank (1), eventually passes air cooler (9) and cools and come back in storage tank (5); Under the effect of cooling water, the wet flue gas carrying subparticle produces condensation in the outside wall surface of tube bank (1), makes part subparticle entrained by flue gas with steam coalescence, is separated with flue gas; Separate out saturation water.
8. low-resistance Forced water cooling according to claim 7 drips the defogging method of type tubular demister, it is characterized in that, also comprises an a tube row rinsing step:
The nozzle (3) of the directed flushing water system of classification regularly, compartment of terrain rinses tube bank (1), rinses current and take away residual in time and be deposited on the particulate dripped in type tube bank demister system, flow to stock tank bottom desulfurizing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765874.0A CN105289179A (en) | 2015-11-11 | 2015-11-11 | Low-resistance forced water cooling drip pipe type demister and demisting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765874.0A CN105289179A (en) | 2015-11-11 | 2015-11-11 | Low-resistance forced water cooling drip pipe type demister and demisting method |
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| CN105289179A true CN105289179A (en) | 2016-02-03 |
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| CN201510765874.0A Pending CN105289179A (en) | 2015-11-11 | 2015-11-11 | Low-resistance forced water cooling drip pipe type demister and demisting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057778A (en) * | 2017-05-05 | 2017-08-18 | 浙江大学 | A kind of fractional condensaion retracting device of coal gas of high temperature containing tar |
| CN112755659A (en) * | 2020-12-30 | 2021-05-07 | 华南理工大学 | Multiple vortex flue gas demisting and water collecting device and method |
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2015
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| EP0405303A1 (en) * | 1989-06-23 | 1991-01-02 | Sumitomo Light Metal Industries Limited | Mist recovery apparatus with twisted strip inserted pipes |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057778A (en) * | 2017-05-05 | 2017-08-18 | 浙江大学 | A kind of fractional condensaion retracting device of coal gas of high temperature containing tar |
| CN112755659A (en) * | 2020-12-30 | 2021-05-07 | 华南理工大学 | Multiple vortex flue gas demisting and water collecting device and method |
| CN112755659B (en) * | 2020-12-30 | 2023-12-22 | 华南理工大学 | Multiple vortex flue gas demisting and water collecting device and method |
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