CN102091513A - Nuclear radiation ammonia method flue gas desulfurization process and equipment - Google Patents
Nuclear radiation ammonia method flue gas desulfurization process and equipment Download PDFInfo
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- CN102091513A CN102091513A CN 201010297297 CN201010297297A CN102091513A CN 102091513 A CN102091513 A CN 102091513A CN 201010297297 CN201010297297 CN 201010297297 CN 201010297297 A CN201010297297 A CN 201010297297A CN 102091513 A CN102091513 A CN 102091513A
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- desulfurizing tower
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Abstract
The invention relates to a nuclear radiation ammonia method flue gas desulfurization process and equipment. The process comprises the following steps of: carrying out cooling and humidifying and dust-removing treatment on sulfur-containing nitrogen-containing flue gas; sending into a radiating system, enabling O2, H2O and N2 in the flue gas to mutually collide with high-energy electron beams generated by an electron accelerator to generate strong oxidizing property active particles for oxidizing SO2 and nitric oxides to generate sulfuric acid and nitric acid; and sending the flue gas into a desulfurizing tower, enabling the flue gas to be in countercurrent contact with a liquid ammonia-containing circulating solution for absorbing liquid drops, water mist and volatilized ammonia which are carried in the flue gas and also absorbing the sulfuric acid and the nitric acid to generate ammonium sulfate and ammonium nitrate, and discharging purified flue gas from a flue gas outlet. The equipment comprises the radiating system and the desulfurizing tower, wherein the radiating system comprises a radiating reactor and the electron accelerator arranged above a reaction region of the radiating reactor. The removal rates of acidic materials and the nitric oxides in the flue gas are as follows: the removal rate of SO2 is not less than 98 percent, and the removal rate of the nitric oxides is not less than 70 percent. The side products are ammonium sulfate and ammonium nitrate fertilizers, thus the utilization rate of ammonia is improved and the industrial application prospect is better.
Description
Technical field
The present invention relates to waste gas treatment process and equipment technical field, particularly a kind of nuclear radiation ammonia flue gas desulfurization technique and equipment thereof.
Background technology
Flue gas desulfurization technique is to utilize alkaline matter to draw airborne acidic materials to be sulfur dioxide, to make it to become the sulfate that is easy to separate.
Wet process of FGD is most important, the most widely used treatment process of purification of sulphur-containing flue gas, accounts for to handle 80% of total amount.Wet process of FGD is to utilize akaline liquid, washes clean sulfur in smoke gas.In recent years, but ammonia-process desulfurization technique is particularly useful for the dedusting and the desulfurization of large and medium-sized Industrial Boiler flue gas with unique technique advantages such as its compact conformation, desulfuration efficiency high resources and receive much attention.But this method Sulphur Dioxide in implementation process is that the speed of sulfur trioxide is slow, and the utilization rate of ammonia and conversion ratio are not high, also has the most of the nitrogen oxide not remove, so the desulfurization of flue gas, denitrification percent are not very high.
Summary of the invention
The technical problem that the present invention solves is: a kind of nuclear radiation ammonia flue gas desulfurization technique and equipment thereof are provided, and it can efficiently remove the sulfur dioxide of high concentration, producing ammonium sulfate byproduct and ammonium nitrate, and the while can be improved the utilization rate and the conversion ratio of ammonia again.
The technical solution adopted for the present invention to solve the technical problems is: a kind of nuclear radiation ammonia flue gas desulfurization technique comprises the steps:
1) will be from the nitrogenous flue gas of the sulfur-bearing of boiler through decreasing temperature and increasing humidity and dust removal process;
2) flue gas after will handling is sent into radiating system, the O in the flue gas
2, H
2O, N
2The high-power electron beam that produces with electron accelerator in the radiating system collides mutually, has generated the active particle of strong oxidizing property, and the active particle of this strong oxidizing property is with SO
2With the nitrogen oxide oxidation, meet the water reaction after the oxidation and generated sulfuric acid and nitric acid;
3) flue gas after the radiation is sent into desulfurizing tower, flue gas from bottom to top with desulfurizing tower top spray under contain ammonia circulation fluid counter current contacting, circulation fluid absorbs the ammonia of droplets entrained in the flue gas, water smoke and volatilization on the one hand, on the other hand with radiation after the sulfuric acid and the nitric acid reaction that generate, sulfate of ammoniac and ammonium nitrate have been generated after the reaction, treat that sulfate of ammoniac and ammonium nitrate solution are saturated back with the circulating pump extraction, flue gas after being purified is discharged by the exhanst gas outlet at desulfurizing tower top.
A kind of nuclear radiation ammonia type flue gas desulfurizing equipment has desulfurizing tower, and desulfurizing tower the place ahead is provided with a radiating system, and radiating system comprises radiation reactor and electron accelerator, and electron accelerator is arranged on the top of radiation reactor reaction zone; The desulfurizing tower internal upper part is equipped with the two-stage type spray equipment, every grade of spraying layer has all connected circulating pump, and the top of two-stage type spray equipment is equipped with the flue gas demister, and the bottom of desulfurizing tower is a liquid storage pool, the bottom of desulfurizing tower has the liquefied ammonia inlet, and liquefied ammonia is extracted out by circulating pump and flowed to every grade of spraying layer.
The front end of radiation reactor is provided with an oxygen and adds device, helps improving the yield of oxyradical, and can suppress the generation of reducing substances, promotes the carrying out of desulfurization and denitrification reaction, effectively reduces the energy consumption of system.
Desulfurizing tower is a void tower, can effectively reduce to absorb resistance and overcome the structure blockage problem.
The material of desulfurizing tower is a fiberglass, effectively avoids the corrosion of ammoniacal liquor circulation fluid to tower body.
The flue gas demister is the secondary baffle type mist eliminator.
The invention has the beneficial effects as follows: the present invention is the mode that adopts nuclear radiation and wet ammonia process desulfurizing to combine, the nitrogen oxide that sulfide in the absorption flue gas and traditional sulfur method are difficult to remove, the desulfuration efficiency height, solved the low problem of oxidation efficiency of imonium salt simultaneously, omitted the step of the ammonium sulfite of present needs, pressurized has improved the utilization rate of ammonia, and energy while desulphurization denitration, and non-secondary pollution; After the desulfurization processing through this technology, flue gas middle acid substance and removal efficiency of nitrogen oxides can reach: SO
2〉=98%; Therefore nitrogen oxide 〉=70% has high purification SO
2And the characteristics of nitrogen oxide, and producing ammonium sulfate byproduct and ammonium nitrate fertilizer have effectively improved the utilization rate of ammonia absorbent, have favorable industrial purposes and prospect.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1, a kind of nuclear radiation ammonia type flue gas desulfurizing equipment, has desulfurizing tower 1, desulfurizing tower 1 the place ahead is provided with a radiating system 2, radiating system 2 comprises radiation reactor 21 and electron accelerator 22, electron accelerator 22 is arranged on the top of radiation reactor 21 reaction zones, and the front end of radiation reactor 21 is provided with an oxygen and adds device 23; Desulfurizing tower 1 internal upper part is equipped with two-stage type spray equipment 3, every grade of spraying layer has all connected circulating pump 4, every stage arrangement comprises two showers, 100 nozzles, 50 nozzles are arranged on each shower, each diameter is 20mm, the shower material is the inside and outside rubber that claims of steel pipe, and nozzle material is a carborundum, and the two-stage spray equipment is 1800mm at interval; The top of two-stage type spray equipment 3 is equipped with flue gas demister 5, and the bottom of desulfurizing tower 1 is a liquid storage pool 6, and the bottom of desulfurizing tower 1 has the liquefied ammonia inlet, and liquefied ammonia is extracted out by circulating pump 4 and flowed to every grade of spraying layer, and desulfurizing tower 1 top has exhanst gas outlet 7.
A kind of nuclear radiation ammonia flue gas desulfurization technique comprises the steps: 1) will be from the nitrogenous flue gas of the sulfur-bearing of boiler through decreasing temperature and increasing humidity and dust removal process; 2) flue gas after will handling is sent into radiating system 2, the electron accelerator 22 in the radiating system 2 with
60Co is the consequent electron beam of radioactive source in target window (titanium foil) injects radiation reactor 21, the O in the flue gas
2, H
2O, N
2The high-power electron beam that produces with electron accelerator 22 in radiation reactor 21 collides mutually, has generated the active particle of strong oxidizing property, and the strong oxidizing property active particle includes free radical, atom and aqueous electron, and the active particle of this strong oxidizing property is with SO
2With the nitrogen oxide oxidation, sulfuric acid and nitric acid have been generated; 3) flue gas after the radiation is sent into desulfurizing tower 1, flue gas from bottom to top with desulfurizing tower 1 top spray under contain liquefied ammonia circulation fluid counter current contacting, circulation fluid absorbs the ammonia and the water smoke of droplets entrained in the flue gas, volatilization on the one hand, on the other hand with radiation after the sulfuric acid and the nitric acid reaction that generate, sulfate of ammoniac and ammonium nitrate have been generated after the reaction, treat circulating pump 4 extractions of the saturated back of sulfate of ammoniac and ammonium nitrate solution, flue gas after being purified is discharged by the exhanst gas outlet 7 at desulfurizing tower 1 top.
A kind of specific embodiment one of nuclear radiation ammonia flue gas desulfurization technique is 180000m from the CFBB flue gas
3/ h, temperature is 140 ℃, enters radiating system 2 from gas approach after the flue gas heat exchange device cools to about 80 ℃ of humidifications, produces high-power electron beam through electron accelerator 22, with the O in the flue gas
2, H
2O, N
2Collision mutually generates the strong oxidizing property active particle, and the strong oxidizing property active particle includes free radical, atom and aqueous electron, wherein contains oxyradical OH, the HO favourable to the desulphurization denitration effect
2And oxygen atom, front end at radiation reactor 21 radiation areas has oxygen to add mouth, add an amount of oxygen to keep higher oxygen content, effectively promoted the generation of oxidative free radical, and then improved the efficient of desulphurization denitration, improved the capacity usage ratio of electron accelerator 22 accordingly, the energy consumption of system is minimized.Flue gas after the radiation enters desulfurizing tower 1, in desulfurizing tower 1 flue gas from bottom to top with top-down ammonia circulation fluid counter current contacting, the SO in the flue gas of containing
3, sulfuric acid, nitric acid absorbs by liquefied ammonia and generates ammonium sulfate and ammonium nitrate, treats that the saturated back of solution send postprocessing working procedures with circulating pump 4 extractions.
A kind of specific embodiment two of nuclear radiation ammonia flue gas desulfurization technique is 52300Nm from the flue gas flow of coal-burning boiler
3/ h, SO
2Concentration is 5300mg/Nm
3, after handling, the deduster coarse filtration enters cooling tower, and spray cooling water in the cooling tower flue gas is cooled to the suitable temperature (being about 70 ℃) of desulphurization denitration.Spray into an amount of oxygen in radiating system 2, flue gas shines about 99% SO through electron accelerator 22 in radiation reactor 21
2Oxidized, generate a large amount of SO
3And a spot of sulfuric acid and nitric acid particle mixture, SO
3Enter the absorption that further circulates of desulfurizing tower 1 and liquefied ammonia, about 98% oxysulfide, 75% nitrogen oxide are recycled liquid and absorb, saturated ammonium sulfate and ammonium nitrate solution are collected at the bottom of tower, deliver to storage tank through circulating pump 4, flue gas after being purified through chimney to airborne release.
Claims (6)
1. a nuclear radiation ammonia flue gas desulfurization technique is characterized in that, comprises the steps:
1) will be from the nitrogenous flue gas of the sulfur-bearing of boiler through decreasing temperature and increasing humidity and dust removal process;
2) flue gas after will handling is sent into radiating system, the O in the flue gas
2, H
2O, N
2The high-power electron beam that produces with electron accelerator in the radiating system collides mutually, has generated the active particle of strong oxidizing property, and the active particle of this strong oxidizing property is with SO
2With the nitrogen oxide oxidation, meet the water reaction after the oxidation and generated sulfuric acid and nitric acid;
3) flue gas after the radiation is sent into desulfurizing tower, flue gas from bottom to top with desulfurizing tower top spray under contain ammonia circulation fluid counter current contacting, circulation fluid absorbs the ammonia of droplets entrained in the flue gas, water smoke and volatilization on the one hand, on the other hand with radiation after the sulfuric acid and the nitric acid reaction that generate, sulfate of ammoniac and ammonium nitrate have been generated after the reaction, treat that sulfate of ammoniac and ammonium nitrate solution are saturated back with the circulating pump extraction, flue gas after being purified is discharged by the exhanst gas outlet at desulfurizing tower top.
2. nuclear radiation ammonia type flue gas desulfurizing equipment, has desulfurizing tower (1), it is characterized in that: desulfurizing tower (1) the place ahead is provided with a radiating system (2), radiating system (2) comprises radiation reactor (21) and electron accelerator (22), and electron accelerator (22) is arranged on the top of radiation reactor (21) reaction zone; Desulfurizing tower (1) internal upper part is equipped with two-stage type spray equipment (3), every grade of spraying layer has all connected circulating pump (4), the top of two-stage type spray equipment (3) is equipped with flue gas demister (5), the bottom of desulfurizing tower (1) is liquid storage pool (6), the bottom of desulfurizing tower (1) has the liquefied ammonia inlet, and liquefied ammonia is extracted out by circulating pump (4) and flowed to every grade of spraying layer.
3. a kind of nuclear radiation ammonia type flue gas desulfurizing equipment according to claim 2 is characterized in that: the front end of described radiation reactor (22) is provided with an oxygen and adds device (23).
4. a kind of nuclear radiation ammonia type flue gas desulfurizing equipment according to claim 2, it is characterized in that: described desulfurizing tower (1) is a void tower.
5. a kind of nuclear radiation ammonia type flue gas desulfurizing equipment according to claim 2, it is characterized in that: the material of described desulfurizing tower (1) is a fiberglass.
6. a kind of nuclear radiation ammonia type flue gas desulfurizing equipment according to claim 2 is characterized in that: described flue gas demister (5) is the secondary baffle type mist eliminator.
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| CN 201010297297 CN102091513A (en) | 2010-09-29 | 2010-09-29 | Nuclear radiation ammonia method flue gas desulfurization process and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010297297 CN102091513A (en) | 2010-09-29 | 2010-09-29 | Nuclear radiation ammonia method flue gas desulfurization process and equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310038A (en) * | 2001-01-17 | 2001-08-29 | 大连冰山集团有限公司 | Wet electron beam fume desulfurizing process |
| CN1332029A (en) * | 2000-07-11 | 2002-01-23 | 徐光� | Semi-dry fume-purifying linear pulse electron beam method |
| CN201214046Y (en) * | 2008-07-03 | 2009-04-01 | 上海洁美环保科技有限公司 | Ammonia process desulphurizing device for reducing ammonia escape |
| CN201324593Y (en) * | 2008-11-25 | 2009-10-14 | 上海洁美环保科技有限公司 | Wet ammonia flue gas desulphurization device |
-
2010
- 2010-09-29 CN CN 201010297297 patent/CN102091513A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332029A (en) * | 2000-07-11 | 2002-01-23 | 徐光� | Semi-dry fume-purifying linear pulse electron beam method |
| CN1310038A (en) * | 2001-01-17 | 2001-08-29 | 大连冰山集团有限公司 | Wet electron beam fume desulfurizing process |
| CN201214046Y (en) * | 2008-07-03 | 2009-04-01 | 上海洁美环保科技有限公司 | Ammonia process desulphurizing device for reducing ammonia escape |
| CN201324593Y (en) * | 2008-11-25 | 2009-10-14 | 上海洁美环保科技有限公司 | Wet ammonia flue gas desulphurization device |
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Application publication date: 20110615 |