CN104668272B - A kind of high-efficient treatment method of flying dust - Google Patents

A kind of high-efficient treatment method of flying dust Download PDF

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CN104668272B
CN104668272B CN201510052854.9A CN201510052854A CN104668272B CN 104668272 B CN104668272 B CN 104668272B CN 201510052854 A CN201510052854 A CN 201510052854A CN 104668272 B CN104668272 B CN 104668272B
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flying dust
treatment method
power plant
efficient treatment
heat treated
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CN104668272A (en
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许俊
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Abstract

The invention discloses the high-efficient treatment method of a kind of flying dust, step is as follows: 1) collects flying dust from the incinerator flue of garbage incinerating power plant, adds and account for the secondary synthesis barrier of flying dust quality 2 10% and the catalyst accounting for flying dust quality 0.5 2% in flying dust;2) flying dust is placed under atmosphere and carries out sufficient heat treated;3) ambient temperature of upper step being reduced, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.Two evils in flying dust can be postbacked boiler of power plant because the waste gas produced after removal, and process leads to, it is achieved the secondary of the refuse energy utilizes, technique environmental protection by the processing method of the present invention the most up hill and dale.

Description

A kind of high-efficient treatment method of flying dust
Technical field
The present invention relates to the high-efficient treatment method of a kind of flying dust.
Background technology
Flying dust is the danger wastes produced in the incinerator flue of garbage incinerating power plant, wherein contain substantial amounts of noxious substance such as two dislike because of, if do not dealt carefully with, cause great injury can to environment, human body, Such as cause the distortion of fetus, induction human canceration etc..But, at present, a kind of method still not having effective this type of danger wastes of process, flying dust is reasonably processed.
In prior art, for the processing method of flying dust, it mostly is simple heat treated, but, there is natural deficiency in this processing method, although two dislike because of can be during heat treated, there is the decomposition of a part, but, when temperature drops to a certain interval, such as in 200-300 DEG C, product after decomposition will be reunited into two evils because of, the effect processed is had a greatly reduced quality, this problem, annoying the technical staff in industry always.
Summary of the invention
It is an object of the invention to provide the high-efficient treatment method of a kind of flying dust.
The technical solution used in the present invention is:
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 2-10% and the catalyst accounting for flying dust quality 0.5-2%;
2) flying dust is placed under atmosphere and carries out sufficient heat treated;
3) ambient temperature of upper step being reduced, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
Described secondary synthesis barrier be thiosulfate, sulphurizing salt, sodium hypophosphite, ammonium dihydrogen phosphate be 1:(0.8-1.2 according to mass ratio): (0.8-1.2): (0.8-1.2) forms.
Described thiosulfate is at least one in sodium thiosulfate, Potassium hyposulfite., Ammonium hyposulfite..
Described sulphurizing salt is at least one in sodium sulfide, Potassium monosulfide., ammonium sulfide.
Described catalyst is V2O5-WO3/TiO2、V2O5-MoO3/TiO2In at least one.
Step 2) in, the temperature of heat treated is 300-800 DEG C.
Step 2) in, the time of heat treated is 30-120min.
Step 2) in, atmosphere is made up of protective gas, trace hydrogen, trace oxygen;Wherein, at least one during protective gas is nitrogen, helium, argon.
In atmosphere, the volume content of hydrogen is 0.1-0.5%, and the volume content of oxygen is 0.1-0.5%, and surplus is protective gas.
In step 3), temperature is reduced to less than 200 DEG C.
The invention has the beneficial effects as follows: the processing method of the present invention, the most up hill and dale two evils in flying dust can be postbacked boiler of power plant because the waste gas produced after removal, and process leads to, it is achieved the secondary of the refuse energy utilizes, technique environmental protection.
Detailed description of the invention
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 2-10% and the catalyst accounting for flying dust quality 0.5-2%;Wherein, described catalyst is V2O5-WO3/TiO2、V2O5-MoO3/TiO2In at least one;Described secondary synthesis barrier be thiosulfate, sulphurizing salt, sodium hypophosphite, ammonium dihydrogen phosphate be 1:(0.8-1.2 according to mass ratio): (0.8-1.2): (0.8-1.2) forms;Described thiosulfate is at least one in sodium thiosulfate, Potassium hyposulfite., Ammonium hyposulfite.;Described sulphurizing salt is at least one in sodium sulfide, Potassium monosulfide., ammonium sulfide.
2) flying dust is placed under atmosphere, heat treated 30-120min at 300-800 DEG C;Wherein, atmosphere is made up of protective gas, trace hydrogen, trace oxygen;Wherein, in atmosphere, the volume content of hydrogen is 0.1-0.5%, and the volume content of oxygen is 0.1-0.5%, and surplus is protective gas, and protective gas is at least one in nitrogen, helium, argon;
3) ambient temperature of upper step being reduced to less than 200 DEG C (preferably, for 25-200 DEG C), the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
Below in conjunction with specific embodiment, the present invention is described further:
Embodiment 1 :
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 2% and the catalyst accounting for flying dust quality 0.5%;Wherein, described catalyst is V2O5-WO3/TiO2;Described secondary synthesis barrier is that sodium thiosulfate, sodium sulfide, sodium hypophosphite, ammonium dihydrogen phosphate are according to the mixture that mass ratio is 1:1:1:1 composition;
2) flying dust is placed in airtight rotary furnace, at 300 DEG C, carries out heat treated 120min;In the atmosphere of airtight rotary furnace, the volume content of hydrogen is 0.1%, and the volume content of oxygen is 0.1%, and surplus is protective gas nitrogen;
3) ambient temperature of upper step being reduced to 180-200 DEG C, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
After tested, before process, two evils in flying dust are 311ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 0.11ng because of class toxic equivalent concentration TEQ/kg。
Embodiment 2 :
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 5% and the catalyst accounting for flying dust quality 1%;Wherein, described catalyst is V2O5-WO3/TiO2;Described secondary synthesis barrier is that sodium thiosulfate, sodium sulfide, sodium hypophosphite, ammonium dihydrogen phosphate are according to the mixture that mass ratio is 1:1.2:1.2:0.8 composition;
2) flying dust is placed in airtight rotary furnace, at 500 DEG C, carries out heat treated 80min;In the atmosphere of airtight rotary furnace, the volume content of hydrogen is 0.2%, and the volume content of oxygen is 0.2%, and surplus is protective gas nitrogen;
3) ambient temperature of upper step being reduced to 80-100 DEG C, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
After tested, before process, two evils in flying dust are 522ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 0.10ng because of class toxic equivalent concentration TEQ/kg。
Embodiment 3 :
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 10% and the catalyst accounting for flying dust quality 1%;Wherein, described catalyst is V2O5-WO3/TiO2With V2O5-MoO3/TiO2Mixture according to mass ratio 1:1;Described secondary synthesis barrier is that sodium thiosulfate, sodium sulfide, sodium hypophosphite, ammonium dihydrogen phosphate are according to the mixture that mass ratio is 1:0.8:0.8:1.2 composition;
2) flying dust is placed in airtight rotary furnace, at 500 DEG C, carries out heat treated 120min;In the atmosphere of airtight rotary furnace, the volume content of hydrogen is 0.5%, and the volume content of oxygen is 0.3%, and surplus is protective gas nitrogen;
3) ambient temperature of upper step being reduced to 60-80 DEG C, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
After tested, before process, two evils in flying dust are 633ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 0.23ng because of class toxic equivalent concentration TEQ/kg。
Embodiment 4 :
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 6% and the catalyst accounting for flying dust quality 2%;Wherein, described catalyst is V2O5-WO3/TiO2With V2O5-MoO3/TiO2Mixture according to mass ratio 1:2;Described secondary synthesis barrier is that sodium thiosulfate, sodium sulfide, sodium hypophosphite, ammonium dihydrogen phosphate are according to the mixture that mass ratio is 1:0.8:0.8:1.2 composition;
2) flying dust is placed in airtight rotary furnace, at 800 DEG C, carries out heat treated 100min;In the atmosphere of airtight rotary furnace, the volume content of hydrogen is 0.2%, and the volume content of oxygen is 0.5%, and surplus is protective gas nitrogen;
3) ambient temperature of upper step being reduced to 60-80 DEG C, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
After tested, before process, two evils in flying dust are 458ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 0.16ng because of class toxic equivalent concentration TEQ/kg。
Embodiment 5 :
A kind of high-efficient treatment method of flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 6% and the catalyst accounting for flying dust quality 2%;Wherein, described catalyst is V2O5-WO3/TiO2With V2O5-MoO3/TiO2Mixture according to mass ratio 1:2;Described secondary synthesis barrier is that sodium thiosulfate, sodium sulfide, sodium hypophosphite, ammonium dihydrogen phosphate are according to the mixture that mass ratio is 1:0.8:0.8:1.2 composition;
2) flying dust is placed in airtight rotary furnace, at 600 DEG C, carries out heat treated 120min;In the atmosphere of airtight rotary furnace, the volume content of hydrogen is 0.2%, and the volume content of oxygen is 0.5%, and surplus is protective gas nitrogen;
3) ambient temperature of upper step being reduced to 100-120 DEG C, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler.
After tested, before process, two evils in flying dust are 399ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 0.13ng because of class toxic equivalent concentration TEQ/kg。
Comparative example 1 :
A kind of flyash treatment method, step is as follows:
Flying dust is collected from the incinerator flue of garbage incinerating power plant, dust is placed in heat treated in the airtight rotary furnace of full nitrogen (in stove, the content of oxygen is less than 0.4vol%), the temperature of stove heating controls at 500 DEG C, heating treatment time is 30min, the waste gas produced in rotary furnace, by pipeline, sends back in power plant boiler.
Through test, before process, two evils in dust are 326ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 1.2ng because of class toxic equivalent concentration TEQ/kg。
Comparative example 2 :
A kind of flyash treatment method, step is as follows:
Flying dust is collected from the incinerator flue of garbage incinerating power plant, dust is placed in heat treated in the airtight rotary furnace of full nitrogen (in stove, the content of oxygen is less than 0.4vol%), the temperature of stove heating controls at 450 DEG C, heating treatment time is 50min, the waste gas produced in rotary furnace, by pipeline, sends back in power plant boiler.
Through test, before process, two evils in dust are 280ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 2.0ng because of class toxic equivalent concentration TEQ/kg。
Comparative example 3 :
A kind of flyash treatment method, step is as follows:
Flying dust is collected from the incinerator flue of garbage incinerating power plant, dust is placed in heat treated in the airtight rotary furnace of full nitrogen (in stove, the content of oxygen is less than 0.4vol%), the temperature of stove heating controls at 300 DEG C, the process time is 90min, the waste gas produced in rotary furnace, by pipeline, sends back in power plant boiler.
Through test, before process, two evils in dust are 260ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 1.1ng because of class toxic equivalent concentration TEQ/kg。
Comparative example 4 :
A kind of flyash treatment method, step is as follows:
Flying dust is collected from the incinerator flue of garbage incinerating power plant, dust is placed in heat treated in the airtight rotary furnace of full nitrogen (in stove, the content of oxygen is less than 0.4vol%), the temperature of stove heating controls at 550 DEG C, the process time is 90min, the waste gas produced in rotary furnace, by pipeline, sends back in power plant boiler.
Through test, before process, two evils in dust are 311ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 1.5ng because of class toxic equivalent concentration TEQ/kg。
Comparative example 5 :
A kind of flyash treatment method, step is as follows:
Flying dust is collected from the incinerator flue of garbage incinerating power plant, dust is placed in heat treated in the airtight rotary furnace of full nitrogen (in stove, the content of oxygen is less than 0.4vol%), the temperature of stove heating controls at 380 DEG C, the process time is 60min, the waste gas produced in rotary furnace, by pipeline, sends back in power plant boiler.
Through test, before process, two evils in dust are 321ng TEQ/kg because of class toxic equivalent concentration, and two evils in the flying dust after heat treated are 1.9ng because of class toxic equivalent concentration TEQ/kg。

Claims (5)

1. the high-efficient treatment method of a flying dust, it is characterised in that: step is as follows:
1) from the incinerator flue of garbage incinerating power plant, collect flying dust, add in flying dust and account for the secondary synthesis barrier of flying dust quality 2-10% and the catalyst accounting for flying dust quality 0.5-2%;
2) flying dust is placed under atmosphere and carries out sufficient heat treated;
3) ambient temperature of upper step being reduced, the waste gas simultaneously produced in upper step heating process is delivered in power plant boiler;
Described secondary synthesis barrier be thiosulfate, sulphurizing salt, sodium hypophosphite, ammonium dihydrogen phosphate be 1:(0.8-1.2 according to mass ratio): (0.8-1.2): (0.8-1.2) forms;Described thiosulfate is at least one in sodium thiosulfate, Potassium hyposulfite., Ammonium hyposulfite.;Described sulphurizing salt is at least one in sodium sulfide, Potassium monosulfide., ammonium sulfide;Described catalyst is V2O5-WO3/TiO2、V2O5-MoO3/TiO2In at least one;Step 2) in, atmosphere is made up of protective gas, trace hydrogen, trace oxygen;Wherein, at least one during protective gas is nitrogen, helium, argon.
The high-efficient treatment method of a kind of flying dust the most according to claim 1, it is characterised in that: step 2) in, the temperature of heat treated is 300-800 DEG C.
The high-efficient treatment method of a kind of flying dust the most according to claim 1, it is characterised in that: step 2) in, the time of heat treated is 30-120min.
The high-efficient treatment method of a kind of flying dust the most according to claim 1, it is characterised in that: in atmosphere, the volume content of hydrogen is 0.1-0.5%, and the volume content of oxygen is 0.1-0.5%, and surplus is protective gas.
The high-efficient treatment method of a kind of flying dust the most according to claim 1, it is characterised in that: in step 3), temperature is reduced to less than 200 DEG C.
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Publication number Priority date Publication date Assignee Title
EP3335810A1 (en) * 2016-12-18 2018-06-20 Guangdong Decheng Environmental Sci-Tech Co. Ltd Method of removing toxins from fly ash

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CN110615660A (en) * 2018-08-09 2019-12-27 苏州重于山新材料科技有限公司 Method for preparing pavement rapid repair material by utilizing waste incineration fly ash

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US5220111A (en) * 1991-09-10 1993-06-15 Air Products And Chemicals, Inc. Fixation of heavy metals in scrubbed municipal solid waste incinerator ash
CN1533991B (en) * 2003-03-27 2010-09-01 北京环能海臣科技有限公司 Power generating heat supplying clean production system using city sewage and garbage resources
CN101823073B (en) * 2010-03-13 2012-01-04 周开根 Gasification-liquefaction disposal method, system and equipment for household garbage
CN103042022B (en) * 2012-12-05 2015-11-25 广东德诚环保科技有限公司 A kind of flyash treatment method
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3335810A1 (en) * 2016-12-18 2018-06-20 Guangdong Decheng Environmental Sci-Tech Co. Ltd Method of removing toxins from fly ash

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