CN110743338A - Multifunctional waste gas purification tower - Google Patents
Multifunctional waste gas purification tower Download PDFInfo
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- CN110743338A CN110743338A CN201910959986.8A CN201910959986A CN110743338A CN 110743338 A CN110743338 A CN 110743338A CN 201910959986 A CN201910959986 A CN 201910959986A CN 110743338 A CN110743338 A CN 110743338A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/323—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- Treating Waste Gases (AREA)
Abstract
The invention relates to a multifunctional waste gas purification tower, wherein a desulfurization and denitrification device comprises an electron beam reactor, the electron beam reactor is a flue gas pipeline in a zigzag structure and comprises a flue gas inlet and a flue gas outlet, and the flue gas inlet is connected with the flue gas pipeline; the electron beam reactor also comprises a vertical smoke inlet part and a vertical smoke exhaust part, wherein an electron beam entrance port is fixedly installed at the top of the vertical smoke inlet part, an electron beam generator is installed at the electron beam entrance port, and an irradiation path of an electron beam emitted by the electron beam generator penetrates through the vertical smoke inlet part; the electron beam reactor is also provided with an ammonia gas inlet.The invention can ensure that the flue gas can be fully irradiated to ensure that SO in the flue gasXAnd NOXCan be completely oxidized, the desulfurization and denitration efficiency is greatly improved, and the device has simple structure and stable operation.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a multifunctional waste gas purification tower.
Background
SO discharged from coal combustion2And NOxIs the main cause of air pollutionThe reason is also the core reason causing serious atmospheric pollution in China. Because the coal proportion in the energy structure of China is large, the desulfurization and denitrification are generally carried out by adopting a method of combining FGD (flue gas desulfurization) and SCR (selective catalytic reduction and denitrification), the method for graded treatment has high pollutant removal efficiency, but the investment and operation cost are high, the process is complex, the equipment is various, and the occupied area is large.
The technology of electron beam irradiation flue gas desulfurization and denitration is a coal-fired flue gas purification technology developed in recent years, and the technology enters an industrial application stage at present. The electronic beam fume desulfurizing and denitrating technology is one high energy electronic beam irradiation process to irradiate fume containing Sulfur Oxide (SO)X) And Nitrogen Oxides (NO)X) The main components in the smoke are ionized or excited by the smoke with the pollutants to generate free radicals with strong activity and oxidizability, and the free radicals oxidize SO in the smoke at a very high speedXAnd NOXAnd sulfur oxides and nitrogen oxides in high valence state are generated. The high valence state oxysulfide and nitrogen oxide react with the moisture in the flue gas and the added ammonia to generate by-products with main components of ammonium sulfate and ammonium nitrate, and the by-products are removed by a by-product collector, so that the flue gas is purified.
However, the existing electron beam irradiation flue gas treatment system has defects in structural design, and the irradiation time of the flue gas is short, SO that the content of free radicals in the flue gas is insufficient, and SO in the flue gas cannot be completely oxidizedXAnd NOXTherefore, compared with the traditional desulfurization and denitrification technologies (such as dry desulfurization and wet desulfurization and the like), the desulfurization and denitrification efficiency of the existing electron beam irradiation flue gas desulfurization and denitrification technology is not very superior, and is difficult to popularize and apply.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a multifunctional waste gas purification tower which can ensure that flue gas can be irradiated fully to ensure that SO in the flue gas is irradiatedXAnd NOXCan be completely oxidized, the desulfurization and denitration efficiency is greatly improved, and the device has simple structure and stable operation.
The technical scheme for solving the technical problems is as follows: a multifunctional waste gas purification tower is characterized in that a desulfurization and denitrification device comprises an electron beam reactor, wherein the electron beam reactor is a flue gas pipeline in a zigzag structure and comprises a flue gas inlet and a flue gas outlet, and the flue gas inlet is connected with the flue gas pipeline; the electron beam reactor also comprises a vertical smoke inlet part and a vertical smoke exhaust part, wherein an electron beam entrance port is fixedly installed at the top of the vertical smoke inlet part, an electron beam generator is installed at the electron beam entrance port, and an irradiation path of an electron beam emitted by the electron beam generator penetrates through the vertical smoke inlet part; the electron beam reactor is also provided with an ammonia gas inlet.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the electron beam reactor is of a vertical tubular structure, a partition plate is fixedly installed in the electron beam reactor, and the vertical tube is divided into a vertical smoke inlet part and a vertical smoke exhaust part.
Further, the ammonia gas inlet is arranged on the vertical smoke exhaust part.
Preferably, the ammonia gas inlet is arranged in the middle of the vertical smoke exhaust part.
Further, a control fan is installed at the smoke inlet and used for controlling the flow speed and pressure of smoke.
Further, a booster fan is installed at the smoke outlet and used for controlling the flow speed and pressure of smoke.
Furthermore, a guide plate is fixedly arranged at the corner of the pipeline of the electron beam reactor.
Further, the desulfurization and denitrification device also comprises a spraying mechanism, and a smoke inlet of the spraying mechanism is connected with the smoke outlet.
Preferably, the spraying mechanism adopts an atomization spraying mode to spray.
Preferably, the bottom of the spraying mechanism is provided with a byproduct recycling port for collecting and recycling byproducts.
The invention has the beneficial effects that: the invention enables the irradiation path of the electron beam to be greatly enlarged by arranging the E-beam reactor in a shape like a Chinese character' jiThe retention time of the flue gas in the reactor is prolonged, the time of the flue gas radiated by the electron beam is greatly prolonged, the flue gas reaction is more sufficient and thorough, and SO in the flue gas is reducedXAnd NOXCan be completely oxidized, thereby greatly improving the desulfurization and denitration efficiency; meanwhile, the whole reactor adopts a structure similar to a folding pipe which is vertically arranged, so that the occupied area is small, and the installation is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of an electron beam reactor according to the present invention;
in the figure: 1. the device comprises a flue gas inlet, 2 an electron beam reactor, 2a vertical smoke inlet part, 2b a vertical smoke exhaust part, 2c a partition plate, 2d a guide plate, 3 an electron beam entrance port, 4 and an organic anticorrosive film.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically connected or connected by pipelines; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, the multifunctional waste gas purification tower designed by the present invention comprises an electron beam reactor 2, wherein the electron beam reactor 2 is a flue gas pipeline in a zigzag structure, and comprises a flue gas inlet 1, a flue gas outlet 5, a vertical flue gas inlet 2a and a vertical flue gas exhaust 2 b. The flue gas inlet 1 is connected with a flue gas pipeline.
An electron beam entrance port 3 is fixedly installed at the top of the vertical smoke inlet part 2a, an electron beam generator is installed at the electron beam entrance port 3, and an irradiation path of an electron beam emitted by the electron beam generator penetrates through the vertical smoke inlet part 2 a. The electron beam reactor 2 is also provided with an ammonia gas inlet 4.
The flue gas enters the electron beam reactor 2 from the flue gas inlet 1, sequentially passes through the vertical flue gas inlet part 2a and the vertical flue gas discharging part 2b, and flows out to the subsequent treatment unit through the flue gas outlet 5. The whole flue gas flows in the electron beam reactor 2 in a shape of a Chinese character 'ji'. The flue gas in the vertical flue gas inlet part 2a can be irradiated by the electron beam to react, SO in the flue gasXAnd NOXOxidized to higher order sulfur oxides and nitrogen oxides. The sulfur oxides and the nitrogen oxides in high valence state react with the water vapor in the flue gas and the introduced ammonia gas to generate ammonium sulfate and ammonium nitrate, thereby completing the processes of desulfurization and denitration.
Because the whole electron beam reactor 2 adopts a long straight pipeline and a bent design, the time and the path of the flue gas irradiated by the electron beam in the pipeline can be greatly prolonged, SO that the SOXAnd NOXThe oxidation will be more complete.
The structure of the electron beam reactor 2 in the shape of the Chinese character ji is the more core invention point of the invention, and aims to prolong the reaction path and time of the flue gas. The electron beam reactor 2 may be in various forms regardless of the shapes in fig. 1 and 2. For example, the electron beam reactor 2 may be a circular tube, a square tube, or an elliptical tube. In order to facilitate the flow of the flue gas, a guide plate 2d can be fixedly arranged at the corner of the pipeline of the electron beam reactor 2 to guide the flow of the flue gas. For example, chamfered flow guides may be provided at the corners.
As shown in fig. 2, the present invention provides an improved technical solution for the convenience of manufacturing and installation, in which the electron beam reactor 2 of the present invention can be directly processed into a vertical tubular structure, and a partition plate 2c is fixedly installed in the tube body to divide the vertical tube into two parts, i.e., a vertical smoke inlet part 2a and a vertical smoke outlet part 2 b. The structure is convenient to manufacture and install, and occupied area can be saved.
As shown in fig. 1, in order to facilitate control of the flow rate and pressure of the flue gas and further control the residence time of the flue gas in the electron beam reactor 2, a control fan 10 is installed at the flue gas inlet 1. The control fan 10 is turned on to accelerate the flow of the flue gas and reduce the residence time of the flue gas in the electron beam reactor 2, otherwise the residence time of the flue gas in the electron beam reactor 2 is increased.
Similarly, in order to further control the flow rate and pressure of the flue gas, a booster fan 9 can be arranged at the flue gas outlet 5.
In order to avoid the waste of ammonia gas, the internal space of the electron beam reactor 2 is reasonably planned, so that the desulfurization and denitrification reactions are more sufficient, and the energy consumption is reduced. In a modified technical scheme, the ammonia gas inlet 4 is arranged on the vertical smoke exhaust part 2 b.
Preferably, the ammonia gas inlet 4 is arranged in the middle of the vertical smoke exhaust part 2 b.
The scheme considers that when ammonia gas is introduced into the front end, nitrogen oxides and sulfur oxides in the flue gas in the irradiation process can cause the waste of partial ammonia gas in the oxidation and reaction processes. And the ammonia does not need the irradiation, consequently can consider letting in the ammonia in vertical portion 2b of discharging fume, divide electron beam reactor 2 into two reaction zones, and desulfurization, denitration reaction are more abundant like this.
As shown in fig. 1, in order to facilitate the removal of the by-products from the flue gas after the reaction and recycle the by-products, the present invention further provides an improved technical solution, in the improved technical solution, the desulfurization and denitration device further comprises a spraying mechanism 6, and a flue gas inlet of the spraying mechanism 6 is connected to a flue gas outlet 5.
Preferably, the spraying mechanism 6 adopts an atomization spraying mode to spray.
Preferably, the bottom of the spraying mechanism 6 is provided with a byproduct recycling port 8 for collecting and recycling byproducts.
The spraying mechanism 6 of the scheme can select a conventional atomization spraying tower, and the sprayed flue gas enters a subsequent processing unit of the device through a smoke outlet 7 of the spraying mechanism 6. The treatment after the flue gas desulfurization and denitration belongs to the prior art in the field, and the flue gas desulfurization and denitration is generally subjected to dehumidification, dust removal and cooling treatment and then is discharged.
The purpose that this scheme design sprayed lies in, can wrap up ammonium sulfate and ammonium nitrate accessory substance in the flue gas after the reaction, and these accessory substances can mix in the flue gas with the form of dust, set up to spray and can wash and retrieve these accessory substances, under the condition of tentatively removing dust to the flue gas, can also retrieve these accessory substances.
The working process of the invention is as follows:
firstly, the flue gas is sent to the device of the invention through a flue gas pipeline, enters the electron beam reactor 2 through the flue gas inlet 1 of the device of the invention, and then flows upwards along the vertical flue gas inlet part 2a to the top along the vertical flue gas inlet part 2 a. In the whole process, the flue gas can be continuously irradiated by electron beams, and the oxysulfide and the nitric oxide in the flue gas can be fully oxidized to form high-valence oxysulfide and nitric oxide.
Then, the flue gas enters the vertical smoke exhaust part 2b through a communication port at the top of the partition plate 2c, at the moment, ammonia gas is introduced from an ammonia gas inlet 4 to combine with the flue gas for reaction, and high-valence-state sulfur oxide, nitrogen oxide and ammonia gas react to generate byproducts of ammonium sulfate and ammonium nitrate.
Finally, the flue gas enters the spraying mechanism 6 from the flue gas outlet 5, the ammonium sulfate and the ammonium nitrate are dissolved in the water by spraying water atomization spraying, the flue gas is discharged through a byproduct recycling port 8 of the spraying mechanism 6 and recycled, and the sprayed flue gas enters the subsequent treatment unit from a smoke outlet 7 of the spraying mechanism 6 and enters a chimney for discharging after subsequent treatment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multi-functional waste gas purification tower which characterized in that: the desulfurization and denitrification device comprises an electron beam reactor (2), wherein the electron beam reactor (2) is a flue gas pipeline in a structure like a Chinese character 'ji', and comprises a flue gas inlet (1) and a flue gas outlet (5), and the flue gas inlet (1) is connected with the flue gas pipeline; the electron beam reactor (2) further comprises a vertical smoke inlet part (2a) and a vertical smoke exhaust part (2b), an electron beam entrance port (3) is fixedly installed at the top of the vertical smoke inlet part (2a), an electron beam generator is installed at the electron beam entrance port (3), and an irradiation path of an electron beam emitted by the electron beam generator penetrates through the vertical smoke inlet part (2 a); the electron beam reactor (2) is also provided with an ammonia gas inlet (4).
2. The multi-functional exhaust gas purification tower of claim 1, wherein: the electron beam reactor (2) is of a vertical tubular structure, a partition plate (2c) is fixedly installed in the electron beam reactor, and the vertical tube is divided into a vertical smoke inlet part (2a) and a vertical smoke exhaust part (2 b).
3. The multi-functional exhaust gas purification tower of claim 1, wherein: the ammonia gas inlet (4) is arranged on the vertical smoke exhaust part (2 b).
4. A multi-functional exhaust gas purification tower according to claim 3, wherein: the ammonia gas inlet (4) is arranged in the middle of the vertical smoke exhaust part (2 b).
5. The multi-functional exhaust gas purification tower of claim 1, wherein: and a control fan (10) is arranged at the flue gas inlet (1) and used for controlling the flow speed and pressure of the flue gas.
6. The multi-functional exhaust gas purification tower of claim 1, wherein: and a booster fan is arranged at the flue gas outlet (5) and used for controlling the flow speed and pressure of the flue gas.
7. The multi-functional exhaust gas purification tower of claim 1, wherein: and a guide plate (2d) is fixedly arranged at the corner of the pipeline of the electron beam reactor (2).
8. The multi-functional exhaust gas purification tower of claim 1, wherein: the desulfurization and denitrification device also comprises a spraying mechanism (6), wherein a smoke inlet of the spraying mechanism (6) is connected with the smoke outlet (5).
9. The multi-functional exhaust gas purification tower of claim 8, wherein: the spraying mechanism (6) adopts an atomization spraying mode to spray.
10. The multi-functional exhaust gas purification tower of claim 8, wherein: and a byproduct recovery port (8) is arranged at the bottom of the spraying mechanism (6) and used for collecting and recycling byproducts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910959986.8A CN110743338A (en) | 2019-10-10 | 2019-10-10 | Multifunctional waste gas purification tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910959986.8A CN110743338A (en) | 2019-10-10 | 2019-10-10 | Multifunctional waste gas purification tower |
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| CN110743338A true CN110743338A (en) | 2020-02-04 |
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| CN201910959986.8A Pending CN110743338A (en) | 2019-10-10 | 2019-10-10 | Multifunctional waste gas purification tower |
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Citations (7)
| 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 |
| JP2002361039A (en) * | 2001-06-11 | 2002-12-17 | Nissin High Voltage Co Ltd | Electron beam type waste gas treatment equipment |
| CN102350198A (en) * | 2011-07-19 | 2012-02-15 | 中环（中国）工程有限公司 | Flue gas baffling double-slurry pool absorbing tower |
| CN203208891U (en) * | 2013-05-06 | 2013-09-25 | 山东省环境保护科学研究设计院 | Turn-round type flue gas dedusting and desulfurizing device |
| CN104258702A (en) * | 2014-10-16 | 2015-01-07 | 厦门大学 | Flue gas desulfurization and denitration method and device through electron beams |
| CN208975494U (en) * | 2018-08-07 | 2019-06-14 | 天津渤海新能环境工程有限公司 | A kind of flue gas desulfurization and denitrification integrated treatment unit |
-
2019
- 2019-10-10 CN CN201910959986.8A patent/CN110743338A/en active Pending
Patent Citations (7)
| 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 |
| JP2002361039A (en) * | 2001-06-11 | 2002-12-17 | Nissin High Voltage Co Ltd | Electron beam type waste gas treatment equipment |
| CN102350198A (en) * | 2011-07-19 | 2012-02-15 | 中环（中国）工程有限公司 | Flue gas baffling double-slurry pool absorbing tower |
| CN203208891U (en) * | 2013-05-06 | 2013-09-25 | 山东省环境保护科学研究设计院 | Turn-round type flue gas dedusting and desulfurizing device |
| CN104258702A (en) * | 2014-10-16 | 2015-01-07 | 厦门大学 | Flue gas desulfurization and denitration method and device through electron beams |
| CN208975494U (en) * | 2018-08-07 | 2019-06-14 | 天津渤海新能环境工程有限公司 | A kind of flue gas desulfurization and denitrification integrated treatment unit |
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Application publication date: 20200204 |