CN108043864A - The removing system of flying dust Zhong bioxin and mercury metal - Google Patents

The removing system of flying dust Zhong bioxin and mercury metal Download PDF

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Publication number
CN108043864A
CN108043864A CN201711322493.0A CN201711322493A CN108043864A CN 108043864 A CN108043864 A CN 108043864A CN 201711322493 A CN201711322493 A CN 201711322493A CN 108043864 A CN108043864 A CN 108043864A
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China
Prior art keywords
bioxin
mercurous
flying dust
mercury
gas
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CN201711322493.0A
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Chinese (zh)
Inventor
高术杰
马明生
刘杰
陈德喜
刘海威
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China ENFI Engineering Corp
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China ENFI Engineering Corp
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Priority to CN201711322493.0A priority Critical patent/CN108043864A/en
Publication of CN108043864A publication Critical patent/CN108043864A/en
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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
    • B01D53/02Separation 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 adsorption, e.g. preparative gas chromatography
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • B09B3/0008Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless comprising an adsorption step
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/102Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/60Heavy metals or heavy metal compounds
    • B01D2257/602Mercury or mercury compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B2220/00Type of waste materials treated
    • B09B2220/06Incineration ashes

Abstract

The present invention provides the removing systems of a kind of flying dust Zhong bioxin and mercury metal.The removing system includes:Bioxin dechlorination unit, for making bioxin in flying dust that dechlorination reaction , bioxin dechlorinations unit occur with flying dust import and mercurous vapor outlet port;Gas-liquid separator unit, for being cooled down to obtain separated mercurous liquid product and mercurous tail gas to containing mercury vapour, gas-liquid separator unit has mercurous steam-gas inlet and mercurous offgas outlet, and mercurous steam-gas inlet is connected with mercurous vapor outlet port;Mercury absorbing unit, for carrying out adsorption treatment to mercurous tail gas, mercury absorbing unit has mercurous inlet exhaust gas, and mercurous inlet exhaust gas is connected with mercurous offgas outlet.Bioxin in flying dust is removed using bioxin dechlorination unit, it cools down and most mercury metal can be separated in a liquid-like manner to containing mercury vapour using gas-liquid separator unit, remaining mercury element in mercurous tail gas recycles the removal of mercury absorbing unit, so as to form the effect that can realize efficient removing mercury.

Description

The removing system of flying dust Zhong bioxin and mercury metal
Technical field
The present invention relates to flying dust process field, in particular to the removing system of a kind of flying dust Zhong bioxin and mercury metal System.
Background technology
Flying ash can be generated in waste incineration, medical wastes incineration and industrial production, contains bioxin in flying dust With the harmful substances such as heavy metal Hg, belong to hazardous waste, it is necessary to carry out harmless treatment.Heavy metal passes through chelating agent or cement etc. Cure, obtain stable compound.However dioxins materials cannot be stablized by curing, it is necessary to be further processed.
The chemical stability of bioxin is very strong, once into organism, is accumulated in vivo because its is highly lipophilic, it is more difficult to arrange Go out, be the substance of the most carcinogenic potential found so far, also referred to as " poison in century ".Exposed to containing bioxin In environment, a variety of pathological symptoms can be caused, and cause chromosome damage, heart failure and cancer etc., the greatest danger has not Reversible teratogenesis, carcinogenic, mutagenic toxicity.Mercury ranks the first as one of toxic heavy metal, toxicity, and mercury is by united nations environment Planning Department is classified as global contaminant, is unique a kind of chemical substance being had an impact to global range in addition to greenhouse gases. After research shows excessive elemental mercury steam and inorganic mercury compound taken in by human body, central nervous system can be caused to damage Wound, equally shows strong teratogenesis, carcinogenic and mutagenesis.
Therefore, the prior art to solve to fly simultaneously there is an urgent need for a kind of scheme that can remove flying dust Zhong bioxin and mercury metal The pollution problem of grey Zhong bioxin and mercury metal.
The content of the invention
It is existing to solve it is a primary object of the present invention to provide the removing system of a kind of flying dust Zhong bioxin and mercury metal The problem of being difficult to remove flying dust Zhong bioxin and mercury metal simultaneously in technology.
To achieve these goals, according to an aspect of the invention, there is provided a kind of flying dust Zhong bioxin and mercury metal Removing system, including:Bioxin dechlorination unit, for making bioxin in flying dust that dechlorination reaction , bioxin dechlorination lists occur Member has flying dust import and mercurous vapor outlet port;Gas-liquid separator unit, for contain mercury vapour cooled down to obtain it is separated Mercurous liquid product and mercurous tail gas, gas-liquid separator unit has mercurous steam-gas inlet and mercurous offgas outlet, containing mercury vapour Import is connected with mercurous vapor outlet port;Mercury absorbing unit, for carrying out adsorption treatment to mercurous tail gas, mercury absorbing unit, which has, to be contained Mercury inlet exhaust gas, mercurous inlet exhaust gas are connected with mercurous offgas outlet.
Further, above-mentioned bioxin dechlorination unit includes:Non-oxidizing gas feeding mechanism;Bioxin dechlorination reaction Room, have non-oxidizing gas import, flying dust import and mercurous vapor outlet port, non-oxidizing gas supply equipment with it is non-oxidizable Gas feed is connected;Sealed flying dust feeding mechanism, is connected with flying dust import.
Further, above-mentioned bioxin dechlorination reaction room also has Tuo bioxin flying dust outlet , bioxin dechlorinations unit also Including chilling apparatus, chilling apparatus is connected with the outlet of Tuo bioxin flying dust, and preferably chilling apparatus and the outlet of Tuo bioxin flying dust is logical Sealed screw conveyor is crossed to be connected.
Further, be provided with flying dust screw conveyor in above-mentioned bioxin dechlorination reaction room, flying dust screw conveyor by Flying dust import extends to the outlet of Tuo bioxin flying dust.
Further, above-mentioned flying dust screw conveyor is blade screw face type screw conveyor.
Further, separated type screw(-type) feeder during above-mentioned sealed flying dust supply equipment includes.
Further, above-mentioned gas-liquid separator unit includes the temperature control equipment, dust-extraction unit and the chilling that are sequentially connected Device, mercurous steam-gas inlet are arranged on temperature control equipment, and mercurous offgas outlet is arranged on quenching apparatus.
Further, above-mentioned quenching apparatus is water cooling plant or air cooling equipment, is preferably two-stage water-cooling device.
Further, chemosorbent or physical absorbent are provided in above-mentioned mercury absorbing unit.
Further, above-mentioned physical absorbent is activated carbon.It applies the technical scheme of the present invention, the removing system of the application Bioxin in flying dust is removed first with bioxin dechlorination unit, Tuo bioxin flying dust is obtained and is carried on non-oxidizing gas In containing mercury vapour, since mercury metal and compound containing mercury can be carried in the form of steam in non-oxidized gas, Can be obtained in bioxin dechlorination unit it is separated with de- bioxin flying dust containing mercury vapour, convenient for being taken off containing mercury in mercury vapour It removes;And the characteristics of based on high temperature containing mercury vapour, it is cooled down first with gas-liquid separator unit can will be most Mercury metal can be separated in a liquid-like manner, and the remaining mercury element in mercurous tail gas is further gone using mercury absorbing unit It removes, so as to form the effect that can realize efficient removing mercury.It can be seen that the removing system of the application is in same technique It realizes while removes the purpose of flying dust Zhong bioxin and mercury metal, therefore flying dust can be solved using above-mentioned removing system simultaneously The pollution problem of Zhong bioxin and mercury metal.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing a further understanding of the present invention, and of the invention shows Meaning property embodiment and its explanation do not constitute improper limitations of the present invention for explaining the present invention.In the accompanying drawings:
Fig. 1 shows the structure diagram of the removing system provided according to an embodiment of the present.
Wherein, above-mentioned attached drawing is marked including the following drawings:
10th, bioxin dechlorination unit;11st, non-oxidizing gas feeding mechanism;12nd, bioxin dechlorination reaction room;13rd, seal Formula flying dust feeding mechanism;14th, chilling apparatus;121st, flying dust screw conveyor;
20th, gas-liquid separator unit;21st, temperature control equipment;22nd, dust-extraction unit;23rd, quenching apparatus;
30th, mercury absorbing unit.
Specific embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As the application background technology is analyzed, there is not yet removed in same technique in flying dust in the prior art Bioxin and mercury metal cause the pollution problem that cannot solve flying dust Zhong bioxin and mercury metal simultaneously, in order to solve above-mentioned skill Art problem, this application provides the removing system of a kind of flying dust Zhong bioxin and mercury metal, as shown in Figure 1, the removing system bag Kuo bioxin dechlorinations unit 10, gas-liquid separator unit 20 and 30 , bioxin dechlorinations unit 10 of mercury absorbing unit are used to make flying dust In bioxin dechlorination reaction , bioxin dechlorinations unit 10 occurs there is flying dust import and mercurous vapor outlet port;Gas-liquid separator Unit 20 is used to be cooled down to obtain separated mercurous liquid product and mercurous tail gas, gas-liquid separator unit 20 to containing mercury vapour With mercurous steam-gas inlet and mercurous offgas outlet, mercurous steam-gas inlet is connected with mercurous vapor outlet port;Mercury absorbing unit 30 is used In carrying out adsorption treatment to mercurous tail gas, mercury absorbing unit 30 has mercurous inlet exhaust gas, mercurous inlet exhaust gas and mercurous tail gas Outlet is connected.
The removing system of the application removes bioxin in flying dust first with bioxin dechlorination unit 10, obtains Tuo bis- Evil English flying dust and be carried in non-oxidizing gas containing mercury vapour, since mercury metal and compound containing mercury can be with the shapes of steam Formula is carried in non-oxidized gas, therefore can be obtained in bioxin dechlorinations unit 10 separated mercurous with Tuo bioxin flying dusts Steam, convenient for the removing containing mercury in mercury vapour;And the characteristics of based on high temperature containing mercury vapour, first with gas-liquid separator unit 20 pairs its cool down and most mercury metal can be separated in a liquid-like manner, remaining mercury in mercurous tail gas member Element is further removed using mercury absorbing unit 30, so as to form the effect that can realize efficient removing mercury.It can be seen that this The removing system of application realizes in same technique while removes the purpose of flying dust Zhong bioxin and mercury metal, therefore uses Above-mentioned removing system can solve the pollution problem of flying dust Zhong bioxin and mercury metal simultaneously.
In a kind of preferred embodiment of the application, as shown in Figure 1, above-mentioned bioxin dechlorination unit 10 is including non-oxidizable 11, bioxin dechlorination reactions room 12 of gas supply device and sealed flying dust feeding mechanism 13;Bioxin dechlorination reaction room 12 has There are non-oxidizing gas import, flying dust import and mercurous vapor outlet port, non-oxidizing gas supply equipment and non-oxidizing gas Import is connected;Sealed flying dust feeding mechanism 13 is connected with flying dust import.Flying dust is supplied using sealed flying dust feeding mechanism 13 The effusion of flying dust is avoided to cause environmental pollution, using dedicated non-oxidizing gas feeding mechanism 11 Xiang bioxin dechlorination reaction room 12 supply non-oxidizing gas carry out air displacement, improve the flexibility of process implementing.
Preferably, as shown in Figure 1, above-mentioned bioxin dechlorination reaction room 12 also there is Tuo bioxin flying dust to export , bioxin Dechlorination unit 10 further includes chilling apparatus 14, and chilling apparatus 14 is connected with the outlet of Tuo bioxin flying dust, by Tuo bioxin flying dust and When transfer out bioxin dechlorination reaction room 12 and improve Tuo bioxin efficiency;It is preferred that chilling apparatus 14 is exported with Tuo bioxin flying dust It is connected by sealed screw conveyor, improves the leakproofness of removing system, avoids the pollution of Tuo bioxin flying dusts.
Flying dust is after dechlorination reaction room is delivered to, although it can be with the shape of relative distribution under non-oxidizing gas effect State is present in dechlorination reaction room, but since gravitational settling acts on its still solvent deposition in the bottom of dechlorination reaction room, causes Tuo bioxin efficiency reduces, in order to solve this problem, preferably as shown in Figure 1, being provided in above-mentioned bioxin dechlorination reaction room 12 Flying dust screw conveyor 121, flying dust screw conveyor 121 extend to Tuo bioxin flying dust by flying dust import and export.Utilize flying dust Screw conveyor 121 improves the transfer efficiency of flying dust or Tuo bioxin flying dusts.
Further preferred above-mentioned flying dust screw conveyor 121 is blade screw face type screw conveyor.It is above-mentioned by controlling The blade rotation of blade screw face type screw conveyor stirs flying dust or Tuo bioxin flying dust;Pass through fixed blade screw face type The blade of screw conveyor and make the rotation conveying flying dust or Tuo bioxin flying dusts of flying dust screw conveyor 121, improve Tuo bis- Evil English efficiency.
In order to improve the transfer efficiency of flying dust and sealing stability, preferably above-mentioned sealed flying dust supply equipment includes centre Disconnection type screw(-type) feeder.
In order to improve the purity of acquired mercurous liquid product, preferably as shown in Figure 1, above-mentioned gas-liquid separator unit 20 wraps The temperature control equipment 21 being sequentially connected, dust-extraction unit 22 and quenching apparatus 23 are included, mercurous steam-gas inlet is arranged on temperature control On device 21, mercurous offgas outlet is arranged on quenching apparatus 23.Before cooling using dust-extraction unit 22 to contain mercury vapour into Row dust removal process, dust causes mercurous liquid product purity to reduce when avoiding mercurous liquid product refrigerated separation.It is above-mentioned Temperature control equipment 21 can be the heat exchanger for being provided with thermal induction element, and temperature is accurately controlled with realizing.
The quenching apparatus 23 of the application can select quenching apparatus 23 commonly used in the prior art, in order to reduce equipment and fortune Row cost, preferably above-mentioned quenching apparatus 23 are water cooling plant or air cooling equipment.It is preferably two to further improve chilling efficiency Grade water cooling plant.
The application can also refer to the adsorption treatment mode of mercurous tail gas the prior art, such as above-mentioned mercury absorbing unit 30 Inside it is provided with chemosorbent or physical absorbent.Cost of material, preferably above-mentioned physics are reduced in order to simplify adsorption treatment process Adsorbent is activated carbon.
In order to which those skilled in the art is made more easily to implement the above-mentioned removing system of the application, as shown in Figure 1, the application The removal methods of a kind of flying dust Zhong bioxin and mercury metal are additionally provided, which includes:Step S1, in non-oxidizing gas In body, make bioxin in flying dust that dechlorination reaction occur, obtain Tuo bioxin flying dust and be carried on containing in non-oxidizing gas Mercury vapour;Step S2 is cooled down to obtain separated mercurous liquid product and mercurous tail gas to containing mercury vapour;And step S3, Adsorption treatment is carried out to mercurous tail gas, removes the mercury element in mercurous tail gas.
The removal methods of the application first with dechlorination reaction remove flying dust in bioxin, obtain Tuo bioxin flying dust and It is carried in non-oxidizing gas and contains mercury vapour, since mercury metal and compound containing mercury can be carried in the form of steam In non-oxidized gas, thus can be obtained in dechlorination reaction step it is separated with de- bioxin flying dust containing mercury vapour, convenient for pair Removing containing mercury in mercury vapour;And the characteristics of based on high temperature containing mercury vapour, it is cooled down first can be by most gold Belonging to mercury can separate in a liquid-like manner, and the remaining mercury element in mercurous tail gas is further gone in a manner of adsorption treatment It removes, so as to form the effect that can realize efficient removing mercury.It can be seen that the removal methods of the application are in same technique It realizes while removes the purpose of flying dust Zhong bioxin and mercury metal, therefore flying dust can be solved simultaneously using above-mentioned removal methods The pollution problem of Zhong bioxin and mercury metal.
In a kind of preferred embodiment of the application, above-mentioned steps S1 includes:Flying dust is conveyed by sealing conveyer To bioxin dechlorination reaction room;The indoor air of bioxin dechlorination reaction is replaced using non-oxidizing gas;Make in flying dust In bioxin dechlorination reaction room dechlorination reaction occurs for bioxin, obtains de- bioxin flying dust and is carried in non-oxidizing gas Containing mercury vapour, preferably dechlorination reaction time >=30min, with bioxin as much as possible of degrading;By Tuo bioxin fly ash carries To chilling apparatus, the cooling of Tuo bioxin flying dusts is completed preferably in 1 minute, prevents bioxin from regenerating, improve bioxin Degradation rate, the target temperature that preferably chilling apparatus is set is 30~150 DEG C.It can ensure to remove bioxin by the above process The unexpected effusion of flying dust in the process;Tuo bioxin flying dusts are delivered to chilling apparatus in time simultaneously, improve the effect of dechlorination reaction Rate.
The non-oxidizing gas of the application can be made choice in common non-oxidizing gas from the prior art, preferably Above-mentioned non-oxidizing atmosphere is nitrogen or inert gas.Further, in order to reduce the processing cost of Tuo bioxin, preferably dechlorination It is 0.1ppm~1% to react the oxygen mass content in Zhong bioxin dechlorination reactions room.Above-mentioned oxygen mass content is controlled above-mentioned In the range of can meet the requirement of Tuo bioxin, therefore reduce the purifying cost of non-oxidizing atmosphere, the oxygen in practical operation Mass content is lower, and the complexity of operation is higher, but above-mentioned content is all achievable.
In order to improve the transfer efficiency of flying dust and sealing stability, preferably above-mentioned sealing conveyer separated type spiral shell in being Revolve batcher.
Flying dust is after dechlorination reaction room is delivered to, although it can be with the shape of relative distribution under non-oxidizing gas effect State is present in dechlorination reaction room, but since gravitational settling acts on its still solvent deposition in the bottom of dechlorination reaction room, causes Tuo bioxin efficiency reduces, and in order to solve this problem, preferably above-mentioned bioxin dechlorination reaction indoor location has flying dust helical feed Machine.Further preferred above-mentioned flying dust screw conveyor is blade screw face type screw conveyor.By controlling above-mentioned blade screw The blade rotation of face type screw conveyor stirs flying dust or Tuo bioxin flying dust;Pass through fixed blade screw face type helical feed The blade of machine and make flying dust screw conveyor rotation conveying flying dust or Tuo bioxin flying dusts, improve Tuo bioxin efficiency.
The condition of the dechlorination reaction of the application may be referred to the prior art, for example the dechlorination reaction of preferred above-mentioned steps S1 exists It is carried out at 100~500 DEG C, in order to further coordinate the dechlorination reaction of the preferred above-mentioned steps S1 of above-mentioned non-oxidizing gas 300 It is carried out at~450 DEG C.
In order to improve the purity of acquired mercurous liquid product, preferably above-mentioned steps S2 includes:Control the temperature containing mercury vapour Degree carries out dust removal process at 300~500 DEG C and to containing mercury vapour, obtains dedusting containing mercury vapour;Dedusting is carried out suddenly containing mercury vapour It is cold, obtain mercurous liquid product and mercurous tail gas.Dust removal process is carried out to containing mercury vapour before cooling, avoids mercurous liquid Dust causes mercurous liquid product purity to reduce during product refrigerated separation.
Further, in order to improve the separative efficiency of mercurous liquid product, preferably above-mentioned steps S2 makes dedusting contain mercury vapour It is cooled at 30~150 DEG C and realizes chilling, chilling period is shorter, and , bioxin degradation effect is better, it is preferred to use air-cooled or water cooling Mode realize chilling, further preferably using two-stage water-cooling realize chilling.
The application step S3 can also refer to the adsorption treatment mode of mercurous tail gas the prior art, such as preferably above-mentioned step Rapid S3 uses physical absorption or chemisorbed to realize and carry out adsorption treatment to mercurous tail gas to adsorb the mercury element in mercurous tail gas. Cost of material is reduced in order to simplify adsorption treatment process, it is preferred to use activated carbon carries out adsorption treatment.
The above-mentioned removal methods of the application are suitable for the flying dust of current general type, and preferably above-mentioned flying dust burns for house refuse Burn the one or more in flying dust, medical refuse burning flyash and industrial dangerous waste flying ash;It is preferred that contain water quality in flying dust It for 0.01~5%, avoids moisture excessive, energy consumption can be caused to increase and flying dust slagging occluding device in storehouse.
Below with reference to embodiment and comparative example, the advantageous effect of the application is further illustrated.
Embodiment 1
Water content is 1% domestic garbage incineration flyash, and separated type screw(-type) feeder adds in bioxin dechlorination in Reative cell before device normal operation, is passed through N2Displace the indoor air of bioxin dechlorination reaction;
The indoor spiral of bioxin dechlorination reaction is controlled, flying dust is made constantly to be exported from flying dust import to Tuo bioxin flying dust It rotates, and in rotation process, controlling the indoor oxygen content of bioxin dechlorination reaction, temperature is 400 DEG C, is made in flying dust for 5ppm Bioxin dechlorination reaction occurs in bioxin dechlorination reaction room, dechlorination reaction continues 60min, obtain de- bioxin flying dust and It is carried in non-oxidizing gas and contains mercury vapour;
Tuo bioxin flying dust is put into quenching flying dust storehouse by the outlet of Tuo bioxin flying dust, control temperature be quenched in 1 minute to 90 DEG C, understand that bioxin degradation rate is calculated in content of dioxin Nei flying dust storehouse through the detection of high-resolution Chromatography/Mass Spectrometry combined instrument Up to 99.5%, carry the non-oxidizing gas containing mercury vapour and enter temperature control equipment out of bioxin dechlorination reaction room;
It is 320 DEG C to carry the non-oxidizing gas containing mercury vapour and adjust temperature by temperature control equipment, and mercury is with mercury metal Steam or the volatilization of chlorination (Asia) mercuryvapour, remove solid particle therein, into water cooling plant by deduster;
Metal mercuryvapour or chlorination (Asia) mercuryvapour are condensed in level-one water cooling plant, and temperature is 150 DEG C, obtains mercurous liquid Product and mercurous tail gas detect the quality of mercury metal and mercury chloride in mercurous liquid product using cold atomic absorbent spectrophotometry Fraction is 72%;
For mercurous tail gas by adsorbent equipment, adsorbent is activated carbon, the final collection for realizing mercury in flying dust.
Embodiment 2
Water content is 0.1% domestic garbage incineration flyash, and separated type screw(-type) feeder adds in bioxin and takes off in Chlorine reative cell before device normal operation, is passed through N2Displace the indoor air of bioxin dechlorination reaction;
The indoor spiral of bioxin dechlorination reaction is controlled, flying dust is made constantly to be exported from flying dust import to Tuo bioxin flying dust It rotates, and in rotation process, it is 1% to control the indoor oxygen-containing mass fraction of bioxin dechlorination reaction, and temperature is 500 DEG C, is made Dechlorination reaction occurs in bioxin dechlorination reaction room for the bioxin in flying dust, and dechlorination reaction continues 60min, obtains de- bioxin Flying dust and be carried in non-oxidizing gas containing mercury vapour;
Tuo bioxin flying dust is put into quenching flying dust storehouse by the outlet of Tuo bioxin flying dust, control temperature be quenched in 1 minute to 150 DEG C, understand that bioxin degradation rate is calculated in content of dioxin Nei flying dust storehouse through the detection of high-resolution Chromatography/Mass Spectrometry combined instrument Up to 85%, carry the non-oxidizing gas containing mercury vapour and enter temperature control equipment out of bioxin dechlorination reaction room;
It is 300 DEG C to carry the non-oxidizing gas containing mercury vapour and adjust temperature by temperature control equipment, and mercury is with mercury metal Steam or the volatilization of chlorination (Asia) mercuryvapour, remove solid particle therein, into water cooling plant by deduster;
Metal mercuryvapour or chlorination (Asia) mercuryvapour are condensed in level-one water cooling plant, and temperature is 140 DEG C, obtains mercurous liquid Product and mercurous tail gas detect the quality of mercury metal and mercury chloride in mercurous liquid product using cold atomic absorbent spectrophotometry Fraction is 68%;
For mercurous tail gas by adsorbent equipment, adsorbent is vermiculite, the final collection for realizing mercury in flying dust.
Embodiment 3
Water content is 5% medical refuse burning flyash, and separated type screw(-type) feeder adds in bioxin dechlorination in Reative cell before device normal operation, is passed through Ar and displaces the indoor air of bioxin dechlorination reaction;
The indoor spiral of bioxin dechlorination reaction is controlled, flying dust is made constantly to be exported from flying dust import to Tuo bioxin flying dust It rotates, and in rotation process, controlling the indoor oxygen content of bioxin dechlorination reaction, temperature is 350 DEG C, makes flying dust for 10ppm In bioxin dechlorination reaction occurs in bioxin dechlorination reaction room, dechlorination reaction continues 60min, obtains de- bioxin flying dust Contain mercury vapour with being carried in non-oxidizing gas;
Tuo bioxin flying dust is put into quenching flying dust storehouse by the outlet of Tuo bioxin flying dust, control temperature be quenched in 1 minute to 90 DEG C, understand that bioxin degradation rate is calculated in content of dioxin Nei flying dust storehouse through the detection of high-resolution Chromatography/Mass Spectrometry combined instrument Up to 96%, carry the non-oxidizing gas containing mercury vapour and enter temperature control equipment out of bioxin dechlorination reaction room;
It is 350 DEG C to carry the non-oxidizing gas containing mercury vapour and adjust temperature by temperature control equipment, and mercury is with mercury metal Steam or the volatilization of chlorination (Asia) mercuryvapour, remove solid particle therein, into water cooling plant by deduster;
Metal mercuryvapour or chlorination (Asia) mercuryvapour are condensed in two-stage water-cooling device, and temperature is 50 DEG C, obtains mercurous liquid Product and mercurous tail gas detect the quality of mercury metal and mercury chloride in mercurous liquid product using cold atomic absorbent spectrophotometry Fraction is 80%;
For mercurous tail gas by adsorbent equipment, adsorbent is activated carbon, the final collection for realizing mercury in flying dust.
Embodiment 4
Water content is 3% industrial flying ash, and separated type screw(-type) feeder adds in bioxin dechlorination reaction in Room before device normal operation, is passed through Ar and displaces the indoor air of bioxin dechlorination reaction;
The indoor spiral of bioxin dechlorination reaction is controlled, flying dust is made constantly to be exported from flying dust import to Tuo bioxin flying dust It rotates, and in rotation process, controlling the indoor oxygen content of bioxin dechlorination reaction, temperature is 350 DEG C, makes flying dust for 100ppm In bioxin dechlorination reaction occurs in bioxin dechlorination reaction room, dechlorination reaction continues 60min, obtains de- bioxin flying dust Contain mercury vapour with being carried in non-oxidizing gas;
Tuo bioxin flying dust is put into quenching flying dust storehouse by the outlet of Tuo bioxin flying dust, control temperature be quenched in 1 minute to 120 DEG C, understand that bioxin degradation rate is calculated in content of dioxin Nei flying dust storehouse through the detection of high-resolution Chromatography/Mass Spectrometry combined instrument Up to 90%, carry the non-oxidizing gas containing mercury vapour and enter temperature control equipment out of bioxin dechlorination reaction room;
It is 500 DEG C to carry the non-oxidizing gas containing mercury vapour and adjust temperature by temperature control equipment, and mercury is with mercury metal Steam or the volatilization of chlorination (Asia) mercuryvapour, remove solid particle therein, into water cooling plant by deduster;
Metal mercuryvapour or chlorination (Asia) mercuryvapour are condensed in level-one water cooling plant, and temperature is 50 DEG C, obtains mercurous liquid Product and mercurous tail gas detect the quality of mercury metal and mercury chloride in mercurous liquid product using cold atomic absorbent spectrophotometry Fraction is 80%;
For mercurous tail gas by adsorbent equipment, adsorbent is activated carbon, the final collection for realizing mercury in flying dust.
Embodiment 5
With embodiment 1 difference lies in, control the indoor oxygen content of bioxin dechlorination reaction as 5ppm, temperature is 100 DEG C, Dechlorination reaction continues 150min , bioxin degradation rates up to 90%.
Embodiment 6
With embodiment 1 difference lies in, control the indoor oxygen content of bioxin dechlorination reaction as 5ppm, temperature is 300 DEG C, Bioxin degradation rate is up to 98.6%.
Embodiment 7
With embodiment 1 difference lies in, control the indoor oxygen content of bioxin dechlorination reaction as 5ppm, temperature is 450 DEG C, Bioxin degradation rate is up to 99.9%.
Embodiment 8
Difference lies in control the indoor oxygen content of bioxin dechlorination reaction as 0.01ppm, temperature 400 with embodiment 1 DEG C , bioxin degradation rates are up to 99.7%.
Embodiment 9
Difference lies in controlling bioxin dechlorination reaction room, temperature drops for 400 DEG C of , bioxin for pure nitrogen gas with embodiment 1 Solution rate is up to 99.4%.
Embodiment 10
Difference lies in control the temperature of bioxin dechlorination reaction room can for 550 DEG C of , bioxin degradation rates with embodiment 1 Up to 90.6%.
Embodiment 11
Difference lies in Tuo bioxin flying dust is put into quenching flying dust storehouse, control by the outlet of Tuo bioxin flying dust with embodiment 1 Temperature was quenched to 30 DEG C of , bioxin degradation rates in 1 minute up to 99.9%.
Embodiment 12
Difference lies in metal mercuryvapour or chlorination (Asia) mercuryvapour are condensed in two-stage water-cooling device, temperature with embodiment 1 For 30 DEG C, the mass fraction of mercury metal and mercury chloride is 82% in mercurous liquid product.
Embodiment 13
Difference lies in carry the non-oxidizing gas containing mercury vapour and adjust temperature by temperature control equipment with embodiment 1 It spends for 280 DEG C, the mass fraction of mercury metal and mercury chloride is 50% in mercurous liquid product.
Embodiment 14
Difference lies in metal mercuryvapour or chlorination (Asia) mercuryvapour are condensed in two-stage water-cooling device, temperature with embodiment 1 For 180 DEG C, the mass fraction of mercury metal and mercury chloride is 65% in mercurous liquid product.
It can be seen that the removal methods for implementing the application using the removing system of the application according to the data of each embodiment, It can be achieved at the same time the ideal removal efficiency of bioxin and mercury.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect:
The removal methods of the application first with dechlorination reaction remove flying dust in bioxin, obtain Tuo bioxin flying dust and It is carried in non-oxidizing gas and contains mercury vapour, since mercury metal and compound containing mercury can be carried in the form of steam In non-oxidized gas, thus can be obtained in dechlorination reaction step it is separated with de- bioxin flying dust containing mercury vapour, convenient for pair Removing containing mercury in mercury vapour;And the characteristics of based on high temperature containing mercury vapour, it is cooled down first can be by most gold Belonging to mercury can separate in a liquid-like manner, and the remaining mercury element in mercurous tail gas is further gone in a manner of adsorption treatment It removes, so as to form the effect that can realize efficient removing mercury.It can be seen that the removal methods of the application are in same technique It realizes while removes the purpose of flying dust Zhong bioxin and mercury metal, therefore flying dust can be solved simultaneously using above-mentioned removal methods The pollution problem of Zhong bioxin and mercury metal.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of removing system of flying dust Zhong bioxin and mercury metal, which is characterized in that including:
Bioxin dechlorination unit (10), for making bioxin in flying dust that dechlorination reaction, the bioxin dechlorination unit occur (10) there is flying dust import and mercurous vapor outlet port;
Gas-liquid separator unit (20), for being cooled down to obtain separated mercurous liquid product and mercurous containing mercury vapour to described Tail gas, the gas-liquid separator unit (20) have mercurous steam-gas inlet and mercurous offgas outlet, the mercurous steam-gas inlet with The mercurous vapor outlet port is connected;
Mercury absorbing unit (30), for carrying out adsorption treatment to the mercurous tail gas, the mercury absorbing unit (30) has mercurous Inlet exhaust gas, the mercurous inlet exhaust gas are connected with the mercurous offgas outlet.
2. removing system according to claim 1, which is characterized in that the bioxin dechlorination unit (10) includes:
Non-oxidizing gas feeding mechanism (11);
Bioxin dechlorination reaction room (12) has non-oxidizing gas import, the flying dust import and the mercurous vapor outlet port, The non-oxidizing gas supply equipment is connected with the non-oxidizing gas import;
Sealed flying dust feeding mechanism (13), is connected with the flying dust import.
3. removing system according to claim 2, which is characterized in that the bioxin dechlorination reaction room (12) also has de- Bioxin flying dust exports, and the bioxin dechlorination unit (10) further includes chilling apparatus (14), the chilling apparatus (14) and institute It states the outlet of Tuo bioxin flying dust to be connected, preferably described chilling apparatus (14) passes through sealed spiral shell with Tuo bioxin flying dust outlet Rotation conveyer is connected.
4. removing system according to claim 3, which is characterized in that be provided in the bioxin dechlorination reaction room (12) Flying dust screw conveyor (121), the flying dust screw conveyor (121) extend to the Tuo bioxin by the flying dust import and fly Ash outlet.
5. removing system according to claim 4, which is characterized in that the flying dust screw conveyor (121) is blade spiral shell Radial facing type screw conveyor.
6. removing system according to claim 2, which is characterized in that the sealed flying dust supply equipment includes middle interruption Open form screw(-type) feeder.
7. removing system according to claim 1, which is characterized in that the gas-liquid separator unit (20) includes phase successively Temperature control equipment (21), dust-extraction unit (22) and quenching apparatus (23) even, the mercurous steam-gas inlet are arranged on the temperature It spends on control device (21), the mercurous offgas outlet is arranged on the quenching apparatus (23).
8. removing system according to claim 7, which is characterized in that the quenching apparatus (23) is water cooling plant or air-cooled Device is preferably two-stage water-cooling device.
9. removing system according to claim 1, which is characterized in that be provided with chemical suction in the mercury absorbing unit (30) Attached dose or physical absorbent.
10. removing system according to claim 9, which is characterized in that the physical absorbent is activated carbon.
CN201711322493.0A 2017-12-12 2017-12-12 The removing system of flying dust Zhong bioxin and mercury metal Pending CN108043864A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108722110A (en) * 2018-06-15 2018-11-02 张弘历 A kind of device for going the removal of mercury from flue gas
CN109675910A (en) * 2019-01-17 2019-04-26 北京工大环能科技有限公司 A kind of processing method for heavy metals such as dioxin in flying dust and mercury
CN110280095A (en) * 2019-07-16 2019-09-27 长沙有色冶金设计研究院有限公司 A kind of method for removing hydrargyrum of flue gas during smelting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108722110A (en) * 2018-06-15 2018-11-02 张弘历 A kind of device for going the removal of mercury from flue gas
CN108722110B (en) * 2018-06-15 2021-06-01 嘉兴市嘉源节能环保科技有限公司 Device for removing mercury from flue gas
CN109675910A (en) * 2019-01-17 2019-04-26 北京工大环能科技有限公司 A kind of processing method for heavy metals such as dioxin in flying dust and mercury
CN109675910B (en) * 2019-01-17 2021-01-05 北京工大环能科技有限公司 Treatment method for heavy metals such as dioxin, mercury and the like in fly ash
CN110280095A (en) * 2019-07-16 2019-09-27 长沙有色冶金设计研究院有限公司 A kind of method for removing hydrargyrum of flue gas during smelting

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