CN109622586A - The method of thermal desorption processing mercury contaminated soil - Google Patents
The method of thermal desorption processing mercury contaminated soil Download PDFInfo
- Publication number
- CN109622586A CN109622586A CN201811545978.0A CN201811545978A CN109622586A CN 109622586 A CN109622586 A CN 109622586A CN 201811545978 A CN201811545978 A CN 201811545978A CN 109622586 A CN109622586 A CN 109622586A
- Authority
- CN
- China
- Prior art keywords
- mercury
- contaminated soil
- desorption
- thermal desorption
- furnace
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
- B09C1/065—Reclamation of contaminated soil thermally by pyrolysis
Abstract
The invention belongs to the technical field of regeneration of contaminated soil, in particular to a kind of method of thermal desorption processing mercury contaminated soil.The method that the thermal desorption handles mercury contaminated soil includes pretreatment unit, thermal desorption unit, mercury fume processing unit, the pretreatment unit are as follows: spray the alkaline water containing villaumite on mercury contaminated soil, the moisture content of mercury contaminated soil is made to be stored in 45 ~ 65wt%；Thermal desorption unit are as follows: mercury contaminated soil is sent into pyrolysis desorption furnace and carries out pyrolysis desorption, temperature in pyrolysis desorption furnace is controlled at 200 ~ 300 DEG C, mercury contaminated soil, in 30 ~ 60min, exports mercury fume, soil is discharged by treated later in the residence time control being pyrolyzed in desorption furnace；Mercury fume processing unit: mercury fume carries out mercury recycling after dedusting, spray washing, and tail gas discharges after demisting, activated carbon adsorption.This method can reduce processing energy consumption under the premise of guaranteeing mercury element higher recovery.
Description
Technical field
The invention belongs to the technical field of regeneration of contaminated soil, in particular to a kind of side of thermal desorption processing mercury contaminated soil
Method.
Background technique
Mercury is a kind of toxic heavy-metal elements, has persistence and bioconcentration.Mercury contaminated soil makes the work on soil
Object mercury content is exceeded, is detrimental to health by approach such as food intakes.Common mercury contaminated soil recovery technique has: (1) solid
Change and stabilize: stabilizer is made with mineral compound, convert mercury to the stable form not dissolved out in the soil, hinders mercury to earth's surface
Water and groundwater environment release.(2) soil washing technology for contaminated soils: Mercury in Soil concentration is reduced using cleaning agent, can permanently administer mercury
Pollution, processing cost are higher.(3) electric repairing technique: being inserted into electrode in mercury contaminated soil, makes mercury ion in DC electric field
Effect is lower to be migrated, and removal purpose is reached.(4) phytoremediation technology: by the plant of plantation energy enriching heavy metal, reach
The purpose of removing heavy metals.(5) thermal desorption technology: using rotary kiln by the mercury evaporative removal in soil.
Thermal desorption technology is because its process range is wide, repairing efficiency is short, increasingly by the favor of technical staff.Application No. is
201610817637.9 innovation and creation disclose a kind of mercury contaminated soil low temperature thermal desorption and mercury efficient recycling method.This method
Pass through pretreatment unit, dosing unit, feed unit, fuel supply unit, thermal desorption unit, discharging unit, vent gas treatment list
Member, treatment unit for waste water and mercury recovery unit are realized.By thermal desorption unit heat contaminated soil make pollutant mercury volatilize and from
It is separated in polluted soil.Villaumite is added in contaminated soil, can reduce thermal desorption running temperature.Extractant is utilized simultaneously
The mercury chloride in cooling water is extracted, the purpose of recycling mercury is made up to.The document discloses: after addition villaumite, thermal desorption temperature
300 ~ 350 DEG C can be reduced to.But applicant obtains according to engineering practice: thermal desorption temperature need to be set as between 400 ~ 600 DEG C,
Mercury element can be just effectively removed.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of sides of thermal desorption processing mercury contaminated soil
Method reduces processing energy consumption under the premise of guaranteeing mercury element higher recovery.
To achieve the goals above, technical scheme is as follows:
The method that thermal desorption handles mercury contaminated soil, including pretreatment unit, thermal desorption unit, mercury fume processing unit, institute
State pretreatment unit are as follows: spray the alkaline water containing villaumite on mercury contaminated soil, be stored in the moisture content of mercury contaminated soil
45~65wt%；
The thermal desorption unit are as follows: mercury contaminated soil is sent into pyrolysis desorption furnace and carries out pyrolysis desorption, in pyrolysis desorption furnace
At 200 ~ 300 DEG C, residence time control of the mercury contaminated soil in pyrolysis desorption furnace exports mercurous in 30 ~ 60min for temperature control
Flue gas, by treated, soil is discharged later；
The mercury fume processing unit: mercury fume after dedusting, spray washing, carry out mercury recycling, tail gas by demisting,
It is discharged after activated carbon adsorption.
As an improvement, the alkaline water sprayed in the pretreatment unit is ammonium hydroxide.
As an improvement, the pyrolysis desorption furnace is including the first furnace body, the second furnace body and is wrapped in the first furnace body and second
The heating chamber of furnace body periphery, mercury contaminated soil successively move in the first furnace body, in the second furnace body, the heat source gas in heating chamber
Then successively moved along the second furnace body, the first furnace body.
As an improvement, the mercury recycling carries out in packed tower, vulcanized sodium is filled in packed tower.
The beneficial effects of the present invention are: (1) has adjusted the moisture content of soil in pretreatment unit, keep soil moisture content abundant
And be easily dispersed, be conducive to the precipitation of mercury element.In thermal desorption unit, vapor abundant is also beneficial to contain mercuryvapour from soil
Middle precipitation.(2) spray the water containing villaumite in the soil, be conducive to villaumite in soil compound containing mercury it is abundant, uniformly connect
Touching.(3) applicant has found through practice, sprays the removal that alkaline water is conducive to compound containing mercury in the soil, the possible reason is,
Alkaline environment is conducive to the chemical reaction of villaumite and compound containing mercury.(4) pyrolysis desorption furnace includes the first furnace body, the second furnace body,
Mercury contaminated soil successively moves in the first furnace body, in the second furnace body, and temperature is higher and higher, and mercury contaminated soil is in the first furnace body
Level-one desorption is completed, second level desorption is completed in the second furnace body, it is left that this thermal energy step utilizes mode that can save thermal energy cost 45%
It is right.(5) for the temperature control in pyrolysis desorption furnace at 200 ~ 300 DEG C, the residence time control in furnace is desorbed in pyrolysis in mercury contaminated soil
System makes the removal rate of compound containing mercury up to 95% or more in 30 ~ 60min.In the base for guaranteeing that compound containing mercury can effectively remove really
On plinth, de- 400 ~ 600 DEG C from routine of pyrolysis are reduced into 200 ~ 300 DEG C, processing energy consumption is substantially reduced.(6) mercury fume
After treatment, mercury element, tail gas energy qualified discharge can effectively be recycled.
Specific embodiment
Embodiment 1
The method that thermal desorption handles mercury contaminated soil, including pretreatment unit, thermal desorption unit, mercury fume processing unit, in advance
Processing unit are as follows: the alkaline water containing villaumite is sprayed on mercury contaminated soil, make the moisture content of mercury contaminated soil be stored in 45 ~
65wt%, villaumite are sodium chloride, and alkaline water is ammonium hydroxide, and spray point may be provided at the feeding inlet of thermal desorption furnace body.
Thermal desorption unit are as follows: mercury contaminated soil is sent into pyrolysis desorption furnace and carries out pyrolysis desorption.Furnace is desorbed in pyrolysis
First furnace body, the second furnace body and the heating chamber for being wrapped in the first furnace body and the second furnace body periphery, mercury contaminated soil is in the first furnace
In vivo, it is successively moved in the second furnace body, the heat source gas in heating chamber is then successively moved along the second furnace body, the first furnace body.Heat
The specific structure of solution desorption furnace can be found in the innovation and creation application No. is 201711470495.4 and 201710519366.3, this 2
Person be the applicant before related application.Temperature in pyrolysis desorption furnace is controlled at 200 ~ 300 DEG C, and mercury contaminated soil is in warm
The residence time control in desorption furnace is solved in 30 ~ 60min, exports mercury fume, soil is discharged by treated later.
Mercury fume processing unit: mercury fume after dedusting, spray washing, carry out mercury recycling, tail gas by demisting,
It is discharged after activated carbon adsorption.Dedusting uses bag filter, and spray uses spray column, and mercury recycling carries out in packed tower, filler
Vulcanized sodium is filled in tower.Demisting uses deentrainment tower, and tail gas can remove a large amount of moisture or drop after deentrainment tower.Tail gas
Activated carbon adsorber is finally entered, the remaining mercury and mercuric compounds of Adsorption denier, later, qualified flue gas up to standard pass through
Chimney is discharged into atmosphere.
Claims (4)
1. the method that thermal desorption handles mercury contaminated soil, including pretreatment unit, thermal desorption unit, mercury fume processing unit,
It is characterized in that,
The pretreatment unit are as follows: spray the alkaline water containing villaumite on mercury contaminated soil, make the moisture content of mercury contaminated soil
It is stored in 45 ~ 65wt%；
The thermal desorption unit are as follows: mercury contaminated soil is sent into pyrolysis desorption furnace and carries out pyrolysis desorption, in pyrolysis desorption furnace
At 200 ~ 300 DEG C, residence time control of the mercury contaminated soil in pyrolysis desorption furnace exports mercurous in 30 ~ 60min for temperature control
Flue gas, by treated, soil is discharged later；
The mercury fume processing unit: mercury fume after dedusting, spray washing, carry out mercury recycling, tail gas by demisting,
It is discharged after activated carbon adsorption.
2. the method for thermal desorption processing mercury contaminated soil according to claim 1, it is characterised in that: the pretreatment unit
The alkaline water of middle sprinkling is ammonium hydroxide.
3. the method for thermal desorption processing mercury contaminated soil according to claim 1, it is characterised in that: furnace is desorbed in the pyrolysis
Including the first furnace body, the second furnace body and the heating chamber for being wrapped in the first furnace body and the second furnace body periphery, mercury contaminated soil is
It is successively moved in one furnace body, in the second furnace body, the heat source gas in heating chamber is then successively moved along the second furnace body, the first furnace body
It is dynamic.
4. the method for thermal desorption processing mercury contaminated soil according to claim 1, it is characterised in that: the mercury recycling exists
It is carried out in packed tower, is filled with vulcanized sodium in packed tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811545978.0A CN109622586B (en) | 2018-12-18 | 2018-12-18 | Method for treating mercury-contaminated soil through thermal desorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811545978.0A CN109622586B (en) | 2018-12-18 | 2018-12-18 | Method for treating mercury-contaminated soil through thermal desorption |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109622586A true CN109622586A (en) | 2019-04-16 |
| CN109622586B CN109622586B (en) | 2022-07-01 |
Family
ID=66074911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811545978.0A Active CN109622586B (en) | 2018-12-18 | 2018-12-18 | Method for treating mercury-contaminated soil through thermal desorption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109622586B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607455A (en) * | 2015-02-06 | 2015-05-13 | 中国科学院武汉岩土力学研究所 | Multi-stage thermal desorption remediation system for organic polluted soil |
| CN104998894A (en) * | 2015-06-02 | 2015-10-28 | 中国环境科学研究院 | Solidification and stabilization method for mercury contaminated soil |
| CN105032915A (en) * | 2015-06-02 | 2015-11-11 | 中国环境科学研究院 | Mercury pollution soil thermal desorption and mercury recovery method and integrated equipment |
| CN106424113A (en) * | 2016-12-22 | 2017-02-22 | 杰瑞环保科技有限公司 | Thermal desorption system and thermal desorption method for treating mercury-contaminated soil |
| CN206009405U (en) * | 2016-08-24 | 2017-03-15 | 南京中船绿洲环保有限公司 | A kind of multistage thermal desorption soil remediation equipment |
| CN107398472A (en) * | 2017-08-24 | 2017-11-28 | 航天凯天环保科技股份有限公司 | A kind of stable method for repairing mercury contaminated soil of low temperature thermal desorption amalgamation |
| CN107398470A (en) * | 2017-08-24 | 2017-11-28 | 航天凯天环保科技股份有限公司 | A kind of method that mercury contaminated soil is repaired in low temperature thermal desorption amalgamation elution |
-
2018
- 2018-12-18 CN CN201811545978.0A patent/CN109622586B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607455A (en) * | 2015-02-06 | 2015-05-13 | 中国科学院武汉岩土力学研究所 | Multi-stage thermal desorption remediation system for organic polluted soil |
| CN104998894A (en) * | 2015-06-02 | 2015-10-28 | 中国环境科学研究院 | Solidification and stabilization method for mercury contaminated soil |
| CN105032915A (en) * | 2015-06-02 | 2015-11-11 | 中国环境科学研究院 | Mercury pollution soil thermal desorption and mercury recovery method and integrated equipment |
| CN206009405U (en) * | 2016-08-24 | 2017-03-15 | 南京中船绿洲环保有限公司 | A kind of multistage thermal desorption soil remediation equipment |
| CN106424113A (en) * | 2016-12-22 | 2017-02-22 | 杰瑞环保科技有限公司 | Thermal desorption system and thermal desorption method for treating mercury-contaminated soil |
| CN107398472A (en) * | 2017-08-24 | 2017-11-28 | 航天凯天环保科技股份有限公司 | A kind of stable method for repairing mercury contaminated soil of low temperature thermal desorption amalgamation |
| CN107398470A (en) * | 2017-08-24 | 2017-11-28 | 航天凯天环保科技股份有限公司 | A kind of method that mercury contaminated soil is repaired in low temperature thermal desorption amalgamation elution |
Non-Patent Citations (1)
| Title |
|---|
| 杨乾坤 等: "氯盐对含汞土壤热脱附的影响", 《环境工程学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109622586B (en) | 2022-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9718105B2 (en) | Indirect thermal desorption device with two-section screw conveyors | |
| CN103272838B (en) | Method and device for repairing contaminated soil with persistent organic pollutants | |
| CN101869800B (en) | Method and system for purifying flue gas generated by incinerating waste materials | |
| CN110006050A (en) | Dangerous waste incineration flue gas purification system and technique | |
| CN111249857A (en) | VOC exhaust-gas treatment purifier and have its baking finish room | |
| CN204841398U (en) | Degradation device who contains low concentration VOCs waste gas | |
| CN103285719B (en) | A kind of Low Temperature Plasma Treating is containing the method for the gas of chlorohydrocarbon | |
| CN205109281U (en) | Waste gas treatment device | |
| CN107096790A (en) | Polluted soil pyrolysis desorption prosthetic appliance and method | |
| CN206911934U (en) | Polluted soil pyrolysis desorption prosthetic appliance | |
| CN105561725A (en) | Waste water recycling device and method in VOCs waste gas recovery process | |
| CN104759462A (en) | Soil leaching quality-improvement restoration device with tail gas treatment function | |
| CN205362214U (en) | Pollute soil desorption repair system | |
| CN204769855U (en) | Soil eluting carries matter prosthetic devices | |
| CN206577554U (en) | Reclaim the device of volatility organic chloride gas | |
| CN108273371A (en) | A kind of the industrial combustion process flue gas purifying method and system of double gas circuits | |
| CN109622586A (en) | The method of thermal desorption processing mercury contaminated soil | |
| CN105056700A (en) | Organic waste gas VOC purification treatment system | |
| CN209076359U (en) | A kind of circulated sprinkling waste gas pollution control and treatment system | |
| CN106216380A (en) | A kind of High Efficiency Thermal desorption repairs mercurous pollution treatment system and method | |
| CN109925869A (en) | Flue gas of refuse burning high-efficient purification processing method | |
| CN105344201B (en) | Based on condensation abstraction method method for organic waste gas recovery | |
| CN205995912U (en) | Treatment of!medical waste equipment based on flotation combined microwave method | |
| CN215138426U (en) | A VOCs exhaust treatment device for concentration variation is big | |
| CN206064125U (en) | A kind of coke cooling water tank exhaust treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |