CN110960976A - Flue gas purifying tower - Google Patents

Flue gas purifying tower Download PDF

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Publication number
CN110960976A
CN110960976A CN201811152165.5A CN201811152165A CN110960976A CN 110960976 A CN110960976 A CN 110960976A CN 201811152165 A CN201811152165 A CN 201811152165A CN 110960976 A CN110960976 A CN 110960976A
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CN
China
Prior art keywords
flue gas
tower
nozzle
distributor
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811152165.5A
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Chinese (zh)
Inventor
曹学新
周清
罗超
刘青
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China Nerin Engineering Co Ltd
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China Nerin Engineering Co Ltd
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Publication date
Application filed by China Nerin Engineering Co Ltd filed Critical China Nerin Engineering Co Ltd
Priority to CN201811152165.5A priority Critical patent/CN110960976A/en
Publication of CN110960976A publication Critical patent/CN110960976A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/30Particle separators, e.g. dust precipitators, using loose filtering material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/40Acidic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a flue gas purification tower which comprises a tower body, a first gas distributor, an alkali liquor spraying system, a second gas distributor and a filtering fog layer. The lower part and the top of the tower body are respectively and correspondingly provided with a flue gas inlet pipe and a flue gas outlet, the tower body is limited with a tower cavity, and the tower cavity is communicated with the flue gas inlet pipe and the flue gas outlet; the first gas distributor is arranged in the tower cavity and is positioned above the flue gas inlet pipe; the alkali liquor spraying system comprises a first nozzle, the first nozzle is positioned in the tower cavity and above the first gas distributor and is used for spraying alkali liquor to purify flue gas downwards; the second gas distributor is positioned in the tower cavity and above the first nozzle; the filtering demisting layer is positioned in the tower cavity and above the second distributor. After the flue gas is treated by the flue gas purification tower provided by the embodiment of the invention, the purification rate can reach more than 90%, the purification effect is very good, and the pollution of the flue gas to the environment is greatly reduced.

Description

Flue gas purifying tower
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a flue gas purification tower.
Background
The solid waste incineration flue gas generally contains pollutants such as acid gas, heavy metal particles, dioxin and the like; the traditional flue gas purification function is single, the flue gas purification rate is low, the purification rate can reach about 50% at most, and the discharged flue gas has serious pollution to the environment.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a flue gas purification tower with high purification rate.
According to the embodiment of the invention, the flue gas purification tower comprises:
the tower comprises a tower body, wherein the lower part and the top of the tower body are respectively and correspondingly provided with a flue gas inlet pipe and a flue gas outlet, a tower cavity is limited in the tower body, and the tower cavity is communicated with the flue gas inlet pipe and the flue gas outlet;
the first gas distributor is arranged in the tower cavity and is positioned above the flue gas inlet pipe;
the alkali liquor spraying system comprises a first nozzle, the first nozzle is positioned in the tower cavity and above the first gas distributor and is used for spraying alkali liquor downwards to purify flue gas;
a second gas distributor located within the tower cavity above the first nozzle;
and the filtering fog layer is positioned in the tower cavity and above the second distributor.
According to the flue gas purification tower provided by the embodiment of the invention, flue gas flows upwards through the first gas distributor, and flue gas airflow is balanced, so that alkali liquor sprayed from the first nozzle of the alkali liquor spraying system can fully react with the flue gas, and pollutants such as acid gas, heavy metal particles and dioxin in the flue gas are dissolved in the alkali liquor, so that the pollutants are separated and removed from the flue gas; simultaneously, owing to set gradually the second air distributor in the top of first nozzle for flue gas after the alkali lye is handled can balanced upflow and merge into and get into the filtering fog layer of crossing, through crossing filtering fog layer, can detach pollutants such as droplet in the flue gas after the alkali lye is handled effectively, consequently, the tail gas after the processing of filtering fog layer obtains effectual purification. Experiments prove that after the flue gas is treated by the flue gas purification tower provided by the embodiment of the invention, the purification rate can reach more than 90%, the purification effect is very good, and the pollution of the flue gas to the environment is greatly reduced.
In addition, the flue gas purification tower according to the embodiment of the invention can also have the following additional technical characteristics:
according to one embodiment of the invention, the first gas distributor and the second gas distributor are both venturi tube holders made of halogen-acid-resistant steel.
According to one embodiment of the invention, the fog filtering layer comprises an adsorbing material supporting layer and an active coke adsorbing layer, the adsorbing material supporting layer is positioned above the second gas distributor, and the active coke adsorbing layer is positioned above the second gas distributor.
Further, the active coke adsorption layer comprises a supporting filter screen and active coke particles wrapped in the supporting filter screen.
Furthermore, the supporting filter screen is composed of a halogen acid resistant steel mesh plate and a fixing device.
According to some embodiments of the invention, further comprising:
the demisting filler spraying and washing device comprises a second nozzle, and the second nozzle is positioned above the filtering fog layer.
According to an embodiment of the present invention, the lye spraying system further comprises:
the liquid accumulation tank is used for storing alkali liquor;
the pipeline extends from the liquid accumulation groove to the position above the first gas distributor, and the first nozzle is arranged on the pipeline and positioned above the first gas distributor;
the circulating pump is used for conveying the alkali liquor in the liquid accumulation tank to the first nozzle along the pipeline;
furthermore, the liquid accumulation groove is positioned at the bottom of the tower cavity and is positioned below the first gas distributor.
Furthermore, one end of the pipeline penetrates out of the tower body from the liquid accumulation groove, the other end of the pipeline penetrates into the tower cavity from the outside of the tower body, and the other end of the pipeline is positioned above the first gas distributor.
Further, the circulating pump is located on the pipeline and outside the tower body.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a flue gas purification tower according to an embodiment of the present invention.
Reference numerals:
flue gas cleaning tower 100
Tower body 1, tower cavity 11, flue gas outlet 12, flue gas inlet pipe 2 and first gas distributor 3
Circulating pump 43 pipeline 44 of first nozzle 41 liquid accumulation tank 42 of alkali liquor spraying system 4
The second gas distributor 5 filters the absorbing material supporting layer 61 of the fog layer 6 and the active coke absorbing layer 62
Second nozzle 71 of demisting filler spray washing device 7
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A flue gas cleaning tower according to an embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, a flue gas purification tower 100 according to an embodiment of the present invention includes a tower body 1, a first gas distributor 3, an alkali liquor spraying system 4, a second gas distributor 5, and a filtering demisting layer 6. The lower part and the top of the tower body 1 are respectively and correspondingly provided with a flue gas inlet pipe 2 and a flue gas outlet 12, the tower body 1 is limited with a tower cavity 11, and the tower cavity 11 is communicated with the flue gas inlet pipe 2 and the flue gas outlet 12; the first gas distributor 3 is arranged in the tower cavity 11 and is positioned above the flue gas inlet pipe 2; the alkali liquor spraying system 4 comprises a first nozzle 41, the first nozzle 41 is positioned in the tower cavity 11 and above the first gas distributor 3 and is used for spraying alkali liquor to purify flue gas; the second gas distributor 5 is positioned in the tower cavity 11 and above the first nozzle 41; the filtered mist layer 6 is positioned in the tower cavity 11 and above the second distributor.
According to the flue gas purification tower 100 provided by the embodiment of the invention, flue gas flows upwards through the first gas distributor 3, and flue gas airflow is balanced, so that alkali liquor sprayed from the first nozzle 41 of the alkali liquor spraying system 4 can fully react with the flue gas, and pollutants such as acid gas, heavy metal particles, dioxin and the like in the flue gas are dissolved in the alkali liquor, so that the pollutants are separated and removed from the flue gas; meanwhile, the second gas distributor 5 is sequentially arranged above the first nozzle 41, so that the flue gas treated by the alkali liquor can flow upwards in a balanced manner and enter the filtered fog layer 6, and pollutants such as fog drops in the flue gas treated by the alkali liquor can be effectively removed through the filtered fog layer 6, so that the tail gas treated by the filtered fog layer 6 is effectively purified. Experiments prove that after the flue gas is treated by the flue gas purification tower 100 provided by the embodiment of the invention, the purification rate can reach more than 90%, the purification effect is very good, and the pollution of the flue gas to the environment is greatly reduced.
According to one embodiment of the invention, the first gas distributor 3 and the second gas distributor 5 are both venturi tube frames made of halogen-acid-resistant steel, so that smoke can flow upwards in a balanced and stable manner, the blockage phenomenon cannot occur after long-term use, the corrosion cannot occur easily, and meanwhile, the installation is convenient and the long-term maintenance is convenient.
According to one embodiment of the invention, the filtering and demisting layer 6 comprises an adsorbing material supporting layer 61 and an active coke adsorbing layer 62, wherein the adsorbing material supporting layer 61 is positioned above the second gas distributor 5, and the active coke adsorbing layer 62 is positioned above the second gas distributor 5. Wherein, the active coke adsorption layer 62 comprises a supporting filter screen and active coke particles wrapped in the supporting filter screen; the supporting filter screen is composed of a halogen acid resistant steel screen plate and a fixing device. Through the adsorbing material supporting layer 61 and the active coke adsorption layer 62, fog drops and pollutants in the flue gas can be effectively filtered and adsorbed, and the flue gas purification effect is good.
According to some embodiments of the present invention, the defogging filler spray washing device 7 comprises a second nozzle 71, and the second nozzle 71 is positioned above the fog layer 6. Spray washing device 7 through the defogging filler, can wash the pollutant on the filtering fog layer 6 for filter fog layer 6 is not blockked up by the dust, keeps oxidation activity, makes gas cleaning continuously high-efficiently go on.
According to some embodiments of the present invention, the lye spraying system 4 further comprises a liquid accumulation tank 42, a pipe 44 and a circulation pump 43. The liquid accumulation tank 42 is used for storing alkali liquor; the pipeline 44 extends from the effusion cell 42 to the upper part of the first gas distributor 3, and the first nozzle 41 is arranged on the pipeline 44 and above the first gas distributor 3; the circulation pump 43 is used for conveying the alkali liquor in the liquid accumulation tank 42 to the first nozzle 41 along the pipeline 44.
According to a further embodiment of the invention, the sump 42 is located at the bottom of the column cavity 11 and below the first gas distributor 3. Because the liquid accumulation tank 42 is located at the bottom of the tower cavity 11, the alkali liquor sprayed by the first nozzle 41 and the pollutants absorbed by the alkali liquor can freely fall into the liquid accumulation tank 42, the alkali liquor is recycled, and meanwhile, the investment and the energy consumption of a separate conveying system are avoided, and on the other hand, after the liquid sprayed by the second nozzle 71 is cleaned by the filtered fog layer 6, the pollutants are communicated and also fall into the liquid accumulation tank 42 under the action of gravity.
According to a still further embodiment of the present invention, one end of the pipeline 44 extends out of the tower body 1 from the effusion cell 42, the other end of the pipeline 44 extends out of the tower body 1 through the tower body 1 and into the tower cavity 11, and the other end of the pipeline 44 is located above the first gas distributor 3, wherein the circulation pump 43 is located on the pipeline 44 and outside the tower body 1 for easy installation and maintenance.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A flue gas purification tower, comprising:
the tower comprises a tower body, wherein the lower part and the top of the tower body are respectively and correspondingly provided with a flue gas inlet pipe and a flue gas outlet, a tower cavity is limited in the tower body, and the tower cavity is communicated with the flue gas inlet pipe and the flue gas outlet;
the first gas distributor is arranged in the tower cavity and is positioned above the flue gas inlet pipe;
the alkali liquor spraying system comprises a first nozzle, the first nozzle is positioned in the tower cavity and above the first gas distributor and is used for spraying alkali liquor downwards to purify flue gas;
a second gas distributor located within the tower cavity above the first nozzle;
and the filtering fog layer is positioned in the tower cavity and above the second distributor.
2. The flue gas purification tower of claim 1, wherein the first gas distributor and the second gas distributor are both venturi tube frames made of halogen-resistant acid steel.
3. The flue gas purification tower of claim 1, wherein the filtered mist layer comprises an adsorbing material supporting layer and an active coke adsorbing layer, the adsorbing material supporting layer is located above the second gas distributor, and the active coke adsorbing layer is located above the second gas distributor.
4. The flue gas purification tower of claim 3, wherein the activated coke adsorption layer comprises a support screen and activated coke particles wrapped in the support screen.
5. The flue gas purification tower of claim 4, wherein the support screen is composed of a halogen acid resistant steel mesh plate and a fixing device.
6. The flue gas purification tower according to any one of claims 1 to 5, further comprising:
the demisting filler spraying and washing device comprises a second nozzle, and the second nozzle is positioned above the filtering fog layer.
7. The flue gas purification tower of claim 1, wherein the lye spraying system further comprises:
the liquid accumulation tank is used for storing alkali liquor;
the pipeline extends from the liquid accumulation groove to the position above the first gas distributor, and the first nozzle is arranged on the pipeline and positioned above the first gas distributor;
and the circulating pump is used for conveying the alkali liquor in the liquid accumulation tank to the first nozzle along the pipeline.
8. The flue gas purification tower of claim 7, wherein the liquid accumulation tank is located at the bottom of the tower cavity and below the first gas distributor.
9. The flue gas purification tower of claim 8, wherein one end of the pipeline passes out of the tower body from the liquid accumulation groove, the other end of the pipeline passes through the tower body from the outside of the tower body and enters the tower cavity, and the other end of the pipeline is located above the first gas distributor.
10. The flue gas purification tower of claim 8, wherein the circulation pump is located on the pipeline and outside the tower body.
CN201811152165.5A 2018-09-29 2018-09-29 Flue gas purifying tower Pending CN110960976A (en)

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Application Number Priority Date Filing Date Title
CN201811152165.5A CN110960976A (en) 2018-09-29 2018-09-29 Flue gas purifying tower

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111467959A (en) * 2020-04-21 2020-07-31 重庆中会表面处理有限公司 Chromium plating fog exhaust treatment system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101537330A (en) * 2009-03-16 2009-09-23 浙江大学 Airflow uniform distribution device of circulating fluidized bed
CN204338009U (en) * 2014-09-16 2015-05-20 深圳市格瑞斯达科技有限公司 Integrated fume purifying column
CN204933155U (en) * 2015-06-25 2016-01-06 莫成杰 A kind of novel vertical demist water stop
CN205216574U (en) * 2015-12-01 2016-05-11 渤海大学 Biofiltration purifies foul smell device
KR20180089281A (en) * 2017-01-31 2018-08-08 노호양 The Portable Device for Person which can remove a harmful germ and the smoke, nicotine, tar etc. when people smoke cigarette using a demister filter
CN209271164U (en) * 2018-09-29 2019-08-20 中国瑞林工程技术股份有限公司 Column for smoke purification

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101537330A (en) * 2009-03-16 2009-09-23 浙江大学 Airflow uniform distribution device of circulating fluidized bed
CN204338009U (en) * 2014-09-16 2015-05-20 深圳市格瑞斯达科技有限公司 Integrated fume purifying column
CN204933155U (en) * 2015-06-25 2016-01-06 莫成杰 A kind of novel vertical demist water stop
CN205216574U (en) * 2015-12-01 2016-05-11 渤海大学 Biofiltration purifies foul smell device
KR20180089281A (en) * 2017-01-31 2018-08-08 노호양 The Portable Device for Person which can remove a harmful germ and the smoke, nicotine, tar etc. when people smoke cigarette using a demister filter
CN209271164U (en) * 2018-09-29 2019-08-20 中国瑞林工程技术股份有限公司 Column for smoke purification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111467959A (en) * 2020-04-21 2020-07-31 重庆中会表面处理有限公司 Chromium plating fog exhaust treatment system

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