CN202700342U - Two-stage adsorption washing tower for desulfuration, denitration, demercuration and removal of particulate matter (PM) 2.5 - Google Patents
Two-stage adsorption washing tower for desulfuration, denitration, demercuration and removal of particulate matter (PM) 2.5 Download PDFInfo
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- CN202700342U CN202700342U CN 201220114229 CN201220114229U CN202700342U CN 202700342 U CN202700342 U CN 202700342U CN 201220114229 CN201220114229 CN 201220114229 CN 201220114229 U CN201220114229 U CN 201220114229U CN 202700342 U CN202700342 U CN 202700342U
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Abstract
The utility model relates to a two-stage adsorption washing tower for desulfuration, denitration, demercuration and removal of particulate matter (PM) 2.5. Adsorption devices of two stages, namely a first-stage adsorption device and a second-stage adsorption device, are arranged inside the washing tower. A demister is arranged above the second-stage adsorption device, and an ozone generator is externally connected with the first-stage adsorption device. The first-stage adsorption device forms a return circuit through a first-stage absorbent circulating pump, a Venturi tube, a first-stage absorbent atomization tube and in-tower absorbent at the bottom of the washing tower. The second-stage adsorption device is provided with a recoverer below a second-stage absorbent atomization tube. Absorbent outside the washing tower is recovered into an external storage tank through a pipeline, and then is lifted to the second-stage absorbent atomization tube through a second-stage absorbent circulating pump. The second-stage absorbent atomization tube ejects liquid in the middle of the washing tower, and the first-stage absorbent atomization tube ejects liquid from the lower portion of the washing tower. Besides, an air separator and the ozone generator are further arranged on an inlet of the washing tower so that large-capacity and high-efficiency integration of the desulfuration, the denitration and the demercuration can be achieved.
Description
Technical field
The invention belongs to the flue gases purification field, concrete a kind of two-stage Absorption Desulfurization denitration demercuration that relates to removes the PM2.5 scrubbing tower.
Background technology
Contain SO in the flue gas of coal-burning boiler
2, the pollutant such as NOx and heavy metal (Hg and Ag), day by day become the primary pollution source of atmosphere and soil pollution.Clear and definite NO in 12 planning
XOverall control will implement in China, if there is not equipment for denitrifying flue gas, then arrange the NO in the flue gas of atmosphere
XThe restriction that can exceed national standard, the carrying out that impact is produced.Therefore, increase NO in the existing flue-gas purification equipment
XPurifier, become the inexorable trend of industry.At present, the improvement technology of flue gas or industrial tail gas is more, and wherein comparative maturity and representative desulfur technology have limestone-gypsum method, ammonia process, two alkaline process etc.The selective catalytic reduction method of denitration technology (SCR), non-selective catalytic reduction (SNCR) and low nitrogen burning method etc.The demercuration technology has the precipitation method and oxidizing process etc.PM2.5 is the superfine particulate matter that can suck the human lung, its particle diameter is little, specific area is large, very easily adsorb multiple poisonous and harmful substances, and the time of staying in atmosphere is long, fed distance is far away, very large to health and Atomspheric Environmental, be mainly derived from the residue that discharges through burning in the processes such as daily generating, industrial production, motor vehicle exhaust emission.Relevant research has obtained many progress to the PM2.5 in the flue gas at present, utilize the steam phase transforming principle to remove PM2.5 such as researching and proposing, or rely on charging particle to be adsorbed and the Cottrell process of deviating from, but near the particle the 1 μ m is in a charged and diffusional charging mixed zone, its charged poor ability, thereby be difficult to remove, and up to the present the industry of PM2.5 removed and still lack effective control device.
For reducing the pollutant emission of China's coal-burning boiler, need take targetedly control technology, in conjunction with the operation and management level of China's coal-burning boiler, especially need developing low-cost, multiple pollutant to unite the technology that removes.The present major part of China's coal-burning boiler has been installed desulfurizer, it mainly is Wet Flue Gas Desulfurization Technique, utilized the acid-base neutralization reaction of sulfur dioxide and alkaline desulfurizing agent to remove sulfur dioxide, harmful substance in the flue gas in the oxynitrides exists mainly with the form of NO, according to easy the to be oxidized character of NO self, as long as NO is oxidized to NO
2, then can in wet desulphurization device, realize SO
2And NO
2In time, remove.Mercury compound in the flue gas is soluble in water, can remove 90% mercury with lime or lime stone as absorbent, and SCR can be with NO in addition
XBe converted into N
2, can effectively promote removing of mercury.
In the prior art, desulfurization, denitration, demercuration all is as independently unit setting, and this just causes construction cost high, and floor space is large, and removal efficiency is low, the defectives such as operating cost height.And traditional device generally adopts A reactor to arrange, not only so that the increase of reactor apparatus spatial altitude, brought the difficulty of installation and maintenance, also so that the unification of absorption liquid overall density, operational management and system operation cost to equipment have been brought disadvantageous factor, can't realize the optimal economic operational effect.
Summary of the invention
For solving the defective that exists in the prior art, the invention provides the integrated apparatus that a kind of desulfurization denitration demercuration removes PM2.5, realize that same set of equipment is concentrated efficiently sulfur dioxide, oxynitrides, heavy metal and microparticle to remove.
The invention provides a kind of two-stage Absorption Desulfurization denitration demercuration and remove the PM2.5 scrubbing tower, at the top of scrubbing tower exhanst gas outlet is set and side-lower arranges smoke inlet, making flue gas is from bottom to top motion state in macroscopic view.Absorbent is separately positioned on outside Ta Nei and the tower, can determine according to the concentration of pollutant in the flue gas composition and the concentration of absorbent.
Scrubbing tower inside arranges the two-stage absorption plant: one-level absorption plant and sponge oil unit.The sponge oil unit top arranges demister, the external ozone generating-device of one-level absorption plant.The one-level absorption plant is set up a loop by the tower inner absorbent of one-level absorbent circulating pump, Venturi tube, one-level absorbent mist pipe and wash tower bottoms.Sponge oil unit arranges recover below secondary absorbent mist pipe, by pipeline the outer absorbent of tower is recovered in the external reservoir, by secondary absorbent circulating pump the outer absorbent of tower is promoted to secondary absorbent mist pipe again.Secondary absorbent mist pipe is at the middle part of scrubbing tower ejection liquid, and the absorbent mist pipe is at the bottom of scrubbing tower ejection liquid.
Establish packing layer in the sponge oil unit, with the removal efficiency of further raising flue gas.
Isolated oxygen is delivered to respectively ozone generator and Venturi tube by threeway.Ozone generator is communicated with smoke inlet, and the ozone of generation is used for the NO of oxidation flue gas; Another road oxygen and tower inner absorbent converge at the Venturi tube place, strong atomizing occurs, the vapour-liquid compound that produces sprays through one-level absorbent mist pipe, the mixture of pure oxygen and tower inner absorbent, can effectively strengthen contacting of flue gas and absorbent, promote the reaction efficiency of flue gas and absorbent, thereby improve removal efficiency.
The sponge oil unit of scrubbing tower is provided with recover, be used for the outer absorbent of tower is collected into external reservoir, prevent that the outer absorbent of tower from mixing with the tower inner absorbent, form relatively independent two-stage absorption plant, be convenient to externally storage tank and the Ta Nei different absorber blend of packing into.In order to allow flue gas smoothly by recover, the present invention arranges gap at the collection bucket of recover, and sloping baffle blocks gap, neither affects flue gas and passes through, and the outer absorbent of tower is unlikely to again to drop to scrubbing tower inside.
The absorbent in one-level loop is at the slurry pool of a built-in wash tower bottoms be arranged between the one-level absorbent mist pipe of scrubbing tower lower position and circulate among the present invention.The absorbent of secondary circuit is in external external reservoir independently and be arranged between the secondary absorbent mist pipe of scrubbing tower higher position and circulate.In addition, also can between one-level absorbent mist pipe, locate to set up filler to improve removal efficiency.
Utilize the present invention can in flue gas, add the MnO of modification
2, can directly be entrained in the flue gas, also may be combined in the air and spray in the scrubbing tower.Utilize the strong oxidizing property of manganese oxide to remove sulfur dioxide partly, nitrogen oxide and mercury, the MnO of simultaneously modification
2Be conducive to the reunion of small ash particle, make PM2.5 grow up into larger particle, thereby reduce the discharging of PM2.5.In addition, by the atomizing that in scrubbing tower, produces, removal efficiency that can Effective Raise PM2. 5.Experimental result draws, and the removal efficiency of PM2.5 improves with the increase of liquid-gas ratio, particularly the removal efficiency of number concentration; The removal efficiency of particle improves with the increase of flue gas degree of supersaturation in the tower, and desulfuration efficiency is subjected to the impact of degree of supersaturation in the tower hardly.
The present invention has following advantage:
1) the invention belongs to flue gas desulfurization, denitration, demercuration, remove the integrating device of PM2.5, compact conformation, floor space is little, the one-time investment cost is low, operating cost is low, and overall efficiency is high, non-secondary pollution.
2) the present invention adopts the double loop absorption plant, reaching under the higher desulfuration efficiency, can keep lower desulfuration efficiency to liquid-gas ratio (L/G), can realize that by the two-stage absorption plant atm number and high efficiency flue gas remove, so that the distribution of the interior flue gas of reactor is more even, be conducive to the interior vapour-liquid of reactor or the chemical reaction of gas gas phase in addition.
3) the present invention is specially adapted to SO in the former flue gas
2, NO
2, the situation that the concentration of NO and mercury is higher is for SO
2, NO
2, in the situation of NO and mercury variable concentrations in flue gas, can with the mixed liquor of different proportion, can make removal efficiency and operating cost reach best economic effect.
4) the present invention integrates desulfurization denitration demercuration and removes PM2.5, and desulfuration efficiency is greater than 95%, and denitration efficiency is greater than 85%, and demercuration efficient is greater than 90%.
Description of drawings
Fig. 1 is the outline drawing that two-stage Absorption Desulfurization denitration demercuration removes the PM2.5 scrubbing tower;
Wherein: 1. scrubbing tower; 2. exhanst gas outlet; 3. spray eliminator; 4. demister; 5. secondary absorbent mist pipe; 6. packing layer; 7. recover; 71. sloping baffle; 72. collection bucket; 73. gap; 8. one-level absorbent mist pipe; 9. secondary absorbent circulating pump; 10. external reservoir; 11. tower inner absorbent; 12. one-level absorbent circulating pump; 13. ozone generator; 14. threeway; 15. Venturi tube; 16. air separator; 17. air intake; 18. smoke inlet; 19. clarifier inlet.
Fig. 2 is the stereogram of recover;
Fig. 3 is the top view of recover;
Fig. 4 is the cutaway view at A-A place among Fig. 3.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Such as Fig. 1, a kind of two-stage Absorption Desulfurization denitration demercuration removes PM2.5 scrubbing tower 1, comprise the exhanst gas outlet 2 that is arranged on scrubbing tower 1 top and the smoke inlet 18 of side-lower, scrubbing tower 1 inside arranges the two-stage absorption plant: the one-level absorption plant comprises the one-level absorbent circulating pump 12 that driving tower inner absorbent 11 upwards flows, spray the one-level absorbent mist pipe 8 of liquid, and be arranged on the Venturi tube 15 between one-level absorbent circulating pump 12 and the one-level absorbent mist pipe 8.Sponge oil unit comprises recover 7, by the external reservoir 10 that pipeline is connected with recover 7, drives the secondary absorbent circulating pump 9 that the outer absorbent of tower flows to top, and the secondary absorbent mist pipe 5 of the ejection of the middle part in scrubbing tower 1 liquid.The one-level absorption plant is set up a circulation by the tower inner absorbent 11 of one-level absorbent circulating pump 12, Venturi tube 15, one-level absorbent mist pipe 8 and scrubbing tower 1 bottom; Sponge oil unit arranges recover 7 below secondary absorbent mist pipe 5, by pipeline the outer absorbent of tower is recovered in the external reservoir 10, by secondary absorbent circulating pump 9 the outer absorbent of tower is promoted to secondary absorbent mist pipe 5 again.
Establish packing layer 6 in the sponge oil unit, to improve the removal efficiency of flue gas.
Venturi tube 15 in the one-level absorption plant connects the ozone generating-device that is comprised of air separator 16 and ozone generator 13.Air is after air intake 17 enters air separator 16, and the oxygen that is separated is switched to respectively ozone generator 13 and Venturi tube 15 through threeway 14.Ozone generator 13 is communicated with smoke inlet 18, and the ozone of generation is used for the NO of oxidation flue gas; Tower inner absorbent 11 and oxygen converge at Venturi tube 15 places, and strong atomizing occurs, and the vapour-liquid compound of generation is through 8 ejections of one-level absorbent mist pipe.
Such as Fig. 1, the sponge oil unit of scrubbing tower 1 is provided with recover 7, is used for the outer absorbent of tower is collected into external reservoir 10, prevents that the outer absorbent of tower from mixing with tower inner absorbent 11.
In order to allow flue gas smoothly by recover 7, the spy is designed to the stereogram that following form: Fig. 2 is recover 7 with it.As shown in the figure, absorber 7 is comprised of sloping baffle 71 and collection bucket 72, and the gap 73 on the collection bucket 72 is the passage that flue gas passes through, sloping baffle 71 blocks gap 73, neither affect flue gas and pass through, the outer absorbent of tower is unlikely to again to drop to scrubbing tower 1 inside, sees Fig. 2 and Fig. 3 for details.
Between secondary absorbent mist pipe 5 and the exhanst gas outlet 2 demister 4 is set, flue gas is discharged from exhanst gas outlet 2 after demister 4 dehydrations.Demister 5 is set to two-layerly among the present invention, and every layer all has up and down spray eliminator 3, and fresh water (FW) enters from clarifier inlet 19, can realize the periodic cleaning to demister 5, guarantees that it is good in fog effect.
More than shown in, the preferred embodiment of just the present invention being made not is any restriction that the present invention is made, any modification of making based on essence of the present invention, structural change still belongs in the protection domain of this structure.
Claims (7)
1. a two-stage Absorption Desulfurization denitration demercuration removes the PM2.5 scrubbing tower, and it is characterized in that: described scrubbing tower arranges one-level absorption plant and sponge oil unit, and the sponge oil unit top arranges demister, the external ozone generating-device of one-level absorption plant; In the described scrubbing tower packing layer is set.
2. two-stage Absorption Desulfurization denitration demercuration according to claim 1 removes the PM2.5 scrubbing tower, it is characterized in that: described sponge oil unit comprises recover, the external reservoir that is connected with recover by pipeline, drive the secondary absorbent circulating pump that the outer absorbent of tower flows to top, and the secondary absorbent mist pipe of the ejection of the middle part in scrubbing tower liquid.
3. two-stage Absorption Desulfurization denitration demercuration according to claim 1 removes the PM2.5 scrubbing tower, it is characterized in that: described one-level absorption plant comprises the one-level absorbent circulating pump that driving tower inner absorbent upwards flows, spray the one-level absorbent mist pipe of liquid, and be arranged on the Venturi tube between one-level absorbent circulating pump and the one-level absorbent mist pipe.
4. two-stage Absorption Desulfurization denitration demercuration according to claim 3 removes the PM2.5 scrubbing tower, it is characterized in that: described Venturi tube connects ozone generating-device.
5. two-stage Absorption Desulfurization denitration demercuration according to claim 4 removes the PM2.5 scrubbing tower, it is characterized in that: described ozone generating-device comprises air separator and the ozone generator that links to each other with smoke inlet.
6. two-stage Absorption Desulfurization denitration demercuration according to claim 2 removes the PM2.5 scrubbing tower, it is characterized in that: on the described recover collection bucket is set, and the gap that supplies flue gas to pass through, and stop the sloping baffle that the outer absorbent of tower passes through from gap.
7. two-stage Absorption Desulfurization denitration demercuration according to claim 1 removes the PM2.5 scrubbing tower, it is characterized in that: the number of described demister is two-layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220114229 CN202700342U (en) | 2012-03-25 | 2012-03-25 | Two-stage adsorption washing tower for desulfuration, denitration, demercuration and removal of particulate matter (PM) 2.5 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220114229 CN202700342U (en) | 2012-03-25 | 2012-03-25 | Two-stage adsorption washing tower for desulfuration, denitration, demercuration and removal of particulate matter (PM) 2.5 |
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| Publication Number | Publication Date |
|---|---|
| CN202700342U true CN202700342U (en) | 2013-01-30 |
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ID=47580683
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220114229 Expired - Fee Related CN202700342U (en) | 2012-03-25 | 2012-03-25 | Two-stage adsorption washing tower for desulfuration, denitration, demercuration and removal of particulate matter (PM) 2.5 |
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| CN (1) | CN202700342U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580509A (en) * | 2012-03-25 | 2012-07-18 | 山东三融环保工程有限公司 | Two-level absorption desulfuration denitration demercuration particulate matter 2.5 (PM2.5) removal washing tower |
| WO2022235151A1 (en) * | 2021-05-07 | 2022-11-10 | Environox B.V. | Device and method for removing a contaminant from gas |
-
2012
- 2012-03-25 CN CN 201220114229 patent/CN202700342U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580509A (en) * | 2012-03-25 | 2012-07-18 | 山东三融环保工程有限公司 | Two-level absorption desulfuration denitration demercuration particulate matter 2.5 (PM2.5) removal washing tower |
| WO2022235151A1 (en) * | 2021-05-07 | 2022-11-10 | Environox B.V. | Device and method for removing a contaminant from gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20200325 |