CN208230523U - Enter the device of kiln soil using the soil waste heat desiccation after thermal desorption - Google Patents
Enter the device of kiln soil using the soil waste heat desiccation after thermal desorption Download PDFInfo
- Publication number
- CN208230523U CN208230523U CN201820430280.3U CN201820430280U CN208230523U CN 208230523 U CN208230523 U CN 208230523U CN 201820430280 U CN201820430280 U CN 201820430280U CN 208230523 U CN208230523 U CN 208230523U
- Authority
- CN
- China
- Prior art keywords
- soil
- cavity
- thermal desorption
- rotary kiln
- flue gas
- 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.)
- Active
Links
Abstract
The utility model relates to contaminated soil processing techniques, it is desirable to provide a kind of soil waste heat desiccation using after thermal desorption enters the device of kiln soil.Including direct thermal desorption rotary kiln and residual heat using device, the container internal cavities of the latter are divided into cold section of cavity and hot arc cavity by vertical baffle；Thermally conductive oil circulation passage is set inside horizontally disposed rotation axis, and the direction of partition two sides blade is on the contrary, keep the soil in two cavitys mobile towards the direction of partition under blade driving；The soil outlet of cold section of cavity is connected to rotary kiln, and the soil outlet of rotary kiln is connected with the soil import of residual heat using device hot arc cavity；The flue gas emission of the two is to flue gas separation system.The contaminated soil to be processed of high-moisture is preheated by desiccation using utility model device, improves the stability and reliability of rotary kiln charging；Apparatus structure is compact, connection and reasonable arrangement, utilization rate of waste heat are high；Have the possibility of modularized production, there is compatibility well with existing rotary kiln.
Description
Technical field
The utility model relates to contaminated soil processing techniques, in particular to enter kiln using the soil waste heat desiccation after thermal desorption
The device of soil.
Background technique
Dystopy thermal desorption is a kind of currently used contaminated soil remediation technology.The technology, which passes through, directly or indirectly to be heated,
Contaminated soil is heated to certain temperature, pollutant is selectively promoted by control system temperature and residence time of material
Gasification volatilization, makes target contaminant separate, remove with soil particle.According to the system of " 2014-2020 Chinese soil repairs market "
Meter analysis, the development of the site remediation in China can be divided into concern stage (1995-2000), preparation stage (2000-2005
Year), startup stage (2005-2010), fast-developing (2010-) and five stages of stable development stage, be currently under fastly
Fast developing stage.By the end of in July, 2014 statistics indicate that, Domestic Environment rehablitation project totally 335, cover 24 provinces, straight
Have jurisdiction over city and autonomous region.Wherein soil remediation project has 192, accounts for the 57% of total rehablitation project quantity, shows soil remediation in ring
Border occupies critical positions in repairing.But China's contaminated site recovery technique is started late, now still at an early stage, heat
Desorption apparatus is mainly by import, and the device of import is often directed to the contaminated soil that moisture is lower than 20%, and moisture is excessively high to be easy to make
It increased dramatically at plant energy consumption, while contaminated soil is easy to appear because moisture high viscosity is big and can not normally enter asking for kiln when rainy season
Topic.On the other hand, it is usually above 300 DEG C just through the temperature of the soil of thermal desorption, has good UTILIZATION OF VESIDUAL HEAT IN value.Cause
This, if it is possible to efficiently enter kiln soil using the soil waste heat desiccation after thermal desorption, thermal desorption device can not only be reduced
Energy consumption, additionally it is possible to the stability and reliability of lifting device operation.
In summary, device and side that a kind of soil waste heat desiccation that can be efficiently used after thermal desorption enters kiln soil are found
Method seems necessary for reduction plant energy consumption, lifting device reliability.
Utility model content
The technical problems to be solved in the utility model is to overcome deficiency in the prior art, is provided a kind of using thermal desorption
Soil waste heat desiccation afterwards enters the device of kiln soil.
In order to solve the technical problem, the solution of the utility model is:
The device that a kind of soil waste heat desiccation using after thermal desorption enters kiln soil, including the revolution of direct thermal desorption are provided
Kiln further includes residual heat using device, and main body is horizontal vessel, and internal cavity is divided into cold section of cavity and heat by vertical baffle
Section cavity；One soil import is respectively set in the outboard end of two cavitys, a soil is respectively set below medial end and
Mouthful, on the medial end top of cold section of cavity, gas vent is set；A piece horizontally disposed rotation axis is installed by bearing assembly
On partition, rotation axis two sides are located in two cavitys；Inside the uniformly distributed hollow blade of rotation axis lateral surface, rotation axis
Thermally conductive oil circulation passage is set and is connected to blade inside；Blade direction having the same in the same cavity, and every
The direction of plate two sides blade is on the contrary, keep the soil in two cavitys mobile towards the direction of partition under blade driving and by soil
Outlet discharge；
Direct thermal desorption rotary kiln is equipped with soil import, soil outlet, desorption gas import and flue gas emission mouth,
In: soil import is connected with the soil outlet of cold section of cavity in residual heat using device, the soil discharge of direct thermal desorption rotary kiln
Mouth is connected with the soil import of hot arc cavity in residual heat using device；The flue gas emission mouth and flue gas point of direct thermal desorption rotary kiln
It is connected from system, the gas vent of cold section of cavity is connected with flue gas purification system in residual heat using device.
In the utility model, the flue gas purification system include sequentially connected cyclone separator, dual firing chamber, chilling tower,
Dust-removal cloth-bag and eluting column；Wherein, the flue gas emission mouth on direct thermal desorption rotary kiln is connected with the entrance of cyclone separator, remaining
The gas vent of cold section of cavity is connected with the entrance of dust-removal cloth-bag in heat utilization device, sets exhaust outlet at the top of eluting column.
In the utility model, the both ends of the rotation axis are by piping connection to circulating pump, for driving conduction oil turning
It is circulated inside moving axis.
In the utility model, the circulation line is attached on the chamber wall of residual heat using device, so that in circulation line
Conduction oil farthest realize heat exchange to avoid energy dissipation.
The method that soil waste heat desiccation after realizing thermal desorption using the utility model enters kiln soil, comprising:
(1) from the soil import of cold section of cavity of residual heat using device introduce water content between 25~40% mass ratioes to
Contaminated soil is handled, introduces the clean soil from direct thermal desorption rotary kiln, clean soil from the soil import of hot arc cavity
Temperature be higher than 250 DEG C；
(2) conduction oil in rotation axis is realizing the heat transfer between the clean soil of heat under power cycle, makes thermally conductive
Oil is heated；Conduction oil after being heated is realizing the heat transfer between contaminated soil to be processed under power cycle, make to
Processing contaminated soil is heated to 100 DEG C or more and moisture content is lower than 20% mass ratio；Clean soil and desiccation after cooling
Contaminated soil to be processed after preheating is under the drive of rotation axis blade respectively from two soil outlet discharges, Polluted Soil to be processed
The desiccation gas that earth generates during heating is directed to flue gas purification system and is further processed after gas vent discharge；
(3) contaminated soil to be processed after desiccation preheating is introduced into direct thermal desorption rotary kiln, turns round in direct thermal desorption
300 DEG C or more are heated to by desorption gas in kiln, carries out thermal desorption processing；The clean soil for completing desorption is arranged from soil outlet
Out, the hot arc cavity further progress for being introduced into residual heat using device exchanges heat with recovery waste heat；
In the above process, residual heat using device and direct thermal desorption rotary kiln keep continuous feed and discharge to run.
The flue gas generated when carrying out thermal desorption processing in direct thermal desorption rotary kiln is directed to flue gas purification system, successively
After cyclonic separation, second-time burning, chilling cooling, bag-type dust and water elution depickling, it is finally exhausted to atmosphere.It is pre- in desiccation
The desiccation gas generated during heat contaminated soil to be processed is finally exhausted to atmosphere after bag-type dust and water elution depickling.
Utility model principles illustrated:
Contaminated soil temperature after turning round the thermal desorption of stove is substantially higher than 300 DEG C, and UTILIZATION OF VESIDUAL HEAT IN value is high, while by
The hometown earth of equipment discharge is suitable with the mass flow for feeding required wet soiling soil, therefore the waste heat of hometown earth has preheating
The precondition of wet soiling soil.The thermal efficiency of paddle sludge drying machine is up to 90%, and paddle desiccation machine can dispose moisture height
And the sludge that viscosity is big, therefore also there is good applicability to soil.Based on the higher excess heat of hometown earth and paddle desiccation
The higher thermal efficiency of machine, wet soiling soil its temperature after preheating, which is higher than 100 DEG C, (would generally be controlled in not higher than 200
DEG C), moisture lower than 20% and stickiness be substantially reduced.The tail gas generated during desiccation preheats contaminated soil to be processed is mainly
SO2, the gases such as vapor, therefore do not need to be passed into dual firing chamber and carry out high-temperature process, be fed directly to bag-type dust and handle and pass through
After eluting column depickling, it can be directly discharged in atmosphere.
Compared with prior art, the utility model has the beneficial effects that
(1) after residual heat using device desiccation preheating, moisture is reduced to the contaminated soil to be processed of high-moisture
20% hereinafter, soil stickiness is effectively controlled, and improves the stability and reliability of direct thermal desorption rotary kiln charging；
(2) device has the possibility of modularized production, can carry out yield amplification according to the processing capacity of revolution stove,
There is compatibility well with existing thermal desorption device；
(3) contaminated soil to be processed the tail gas that drying process generates be pumped down to revolution stove itself it is configured flue gas it is net
Change system is handled, simpler with common mud drying device structure compared；
(4) apparatus structure of the utility model is compact, connection and reasonable arrangement, utilization rate of waste heat are high, has effectively achieved soil
Thermal desorption it is energy-saving.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for entering the device of kiln soil using the soil waste heat desiccation after thermal desorption；
Fig. 2 is the structural schematic diagram of residual heat using device.
Appended drawing reference in figure are as follows: 1 direct thermal desorption rotary kiln；2 cyclone separators；3 dual firing chamber；4 chilling towers；5 cloth bags
Deduster；6 eluting columns；7 residual heat using devices；8 gas vents；9 Heat-conduction oil circulation systems；10 circulating pumps；11 partitions；12 slurries
Leaf；13 dry contaminated soil outlets；14 cold clean soil outlets；15 rotation axis.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described.
In the utility model, soil thermal desorption is carried out using direct thermal desorption rotary kiln and is carried out using flue gas separation system
Gas cleaning processing is technology contents well known to those skilled in the art, table no longer detailed for these content the utility model
It states.
Soil waste heat desiccation described in the utility model using after thermal desorption enters the device of kiln soil, including direct thermal desorption
Rotary kiln 1 and residual heat using device 7.The main body of residual heat using device 7 is horizontal vessel, and internal cavity is divided by vertical baffle 11
It is divided into cold section of cavity and hot arc cavity；One soil import is respectively set in the outboard end of two cavitys, (is leaned in medial end
Nearly partition position) one soil outlet 13,14 of each setting in lower section, on the medial end top of cold section of cavity, gas vent 8 is set.
A piece horizontally disposed rotation axis 15 is mounted on partition 11 by bearing assembly, and 15 two sides of rotation axis are located at
In two cavitys；Thermally conductive oil circulation passage is set simultaneously inside the uniformly distributed hollow blade 12 of 15 lateral surface of rotation axis, rotation axis 15
It is connected to inside blade 12；Circulating pump is connected to by circulation line in two ends of rotation axis 15, for driving conduction oil
It is circulated inside rotation axis 15.Circulation line may be selected to be attached on the chamber wall of residual heat using device 7, so that circulation pipe
Conduction oil in road farthest realizes heat exchange to avoid energy dissipation.It rotation axis 15, blade 12, circulation line and follows
Ring pump 10 together constitutes Heat-conduction oil circulation system 9.The direction having the same of blade 12 in the same cavity, and partition
The directions of 10 two sides blades 12 on the contrary, keep soil in two cavitys mobile towards the direction of partition 11 under the driving of blade 12,
And finally by 13,14 discharge of soil outlet.
Soil import, soil outlet, desorption gas import and flue gas emission are equipped on direct thermal desorption rotary kiln 1
Mouthful, in which: soil import is connected with the soil outlet 13 of cold section of cavity in residual heat using device 7, direct thermal desorption rotary kiln 1
Soil outlet is connected with the soil import of hot arc cavity in residual heat using device 7；The flue gas emission of direct thermal desorption rotary kiln 1
Mouth is connected with flue gas separation system, and the gas vent 8 of cold section of cavity is connected with flue gas purification system in residual heat using device 7.
Flue gas purification system includes sequentially connected cyclone separator 2, dual firing chamber 3, chilling tower 4, dust-removal cloth-bag 5 and elution
Tower 6；Wherein, the flue gas emission mouth on direct thermal desorption rotary kiln 1 is connected with the entrance of cyclone separator 2, residual heat using device 7
In the gas vent 8 of cold section of cavity be connected with the entrance of dust-removal cloth-bag 5, set exhaust outlet at the top of eluting column 6.
In the utility model, adiabatic heat-insulation is can be used in each wall surface of residual heat using device 7, as much as possible raising UTILIZATION OF VESIDUAL HEAT IN
Efficiency.12 arranged direction of paddle in cold section of cavity and hot arc cavity on the contrary, be in order to guarantee contaminated soil to be processed and
The clean soil of heat enters in the middle part of device simultaneously under the action of rotation axis 15.Paddle 12 is coaxially arranged and contrary, can
Guarantee to simplify transmission device while soil continuous feed.Contaminated soil tail gas in drying process is pumped down to flue gas in cold section
Purification system, which carries out processing, can prevent secondary pollution.The partition 11 being arranged between two cavitys for prevent clean soil again by
Pollution.Finally, the contaminated soil to be processed of High water cut is heated to 100 DEG C or more and moisture is lower than 20%, can be directly entered straight
It connects thermal desorption rotary kiln 1 to be disposed, and is not easy the problem of difficult feed occur；
The method that soil waste heat desiccation after realizing thermal desorption using utility model device enters kiln soil, comprising:
(1) water content is introduced between 25~40% mass ratioes from the soil import of 7 cold sections of cavitys of residual heat using device
Contaminated soil to be processed introduces the clean soil from direct thermal desorption rotary kiln 1, clean soil from the soil import of hot arc cavity
The temperature of earth is higher than 250 DEG C；
(2) conduction oil in rotation axis 15 is realizing the heat transfer between the clean soil of heat under power cycle, makes to lead
Hot oil is heated；Conduction oil after being heated is realizing the heat transfer between contaminated soil to be processed under power cycle, make
Contaminated soil to be processed is heated to 100 DEG C or more and moisture content is lower than 20% mass ratio；Clean soil after cooling and dry
Contaminated soil to be processed after changing preheating exports 13,14 rows from two soil respectively under the drive of blade 12 in rotation axis 15
Out, during desiccation preheats contaminated soil to be processed, it is net to be directed to flue gas after the discharge of gas vent 8 for the desiccation gas of generation
Change system is further processed；
(3) contaminated soil to be processed after desiccation preheating is introduced into direct thermal desorption rotary kiln 1, turns round in direct thermal desorption
300 DEG C or more are heated to by desorption gas in kiln 1, carries out thermal desorption processing；The clean soil being desorbed is completed from soil outlet
Discharge, the hot arc cavity further progress for being introduced into residual heat using device 7 exchange heat with recovery waste heat.
The flue gas generated when carrying out thermal desorption processing in direct thermal desorption rotary kiln 1 is directed to flue gas purification system, according to
It is secondary to cool down through cyclonic separation, second-time burning, chilling, after bag-type dust and water elution depickling, it is finally exhausted to atmosphere；It is to be processed
The desiccation gas that contaminated soil generates in desiccation warm is finally exhausted to after bag-type dust and water elution depickling
Atmosphere.
In the above process, residual heat using device 7 and direct thermal desorption rotary kiln 1 keep continuous feed and discharge to run.Dress
The charging rate (i.e. the velocity of rotation of paddle) of scale and hometown earth and wet soiling soil is set according to direct thermal desorption rotary kiln 1
Disposing capacity be adjusted；The whole flow velocity of conduction oil should be greater than 2.5 meter per seconds in Heat-conduction oil circulation system 9.
Claims (4)
1. a kind of soil waste heat desiccation using after thermal desorption enters the device of kiln soil, including direct thermal desorption rotary kiln, special
Sign is, further includes residual heat using device, and main body is horizontal vessel, and internal cavity is divided into cold section of cavity by vertical baffle
With hot arc cavity；One soil import is respectively set in the outboard end of two cavitys, a soil is respectively set below medial end
Gas vent is arranged on the medial end top of cold section of cavity in earth outlet；A piece horizontally disposed rotation axis passes through bearing assembly
It is mounted on partition, the two sides of rotation axis are located in two cavitys；In the uniformly distributed hollow blade of rotation axis lateral surface, rotation
Thermally conductive oil circulation passage is set inside axis and is connected to blade inside；Blade court having the same in the same cavity
To, and the direction of partition two sides blade is on the contrary, keep the soil in two cavitys mobile towards the direction of partition under blade driving
And it is exported and is discharged by soil；
Direct thermal desorption rotary kiln is equipped with soil import, soil outlet, desorption gas import and flue gas emission mouth, in which:
Soil import is connected with the soil outlet of cold section of cavity in residual heat using device, the soil outlet of direct thermal desorption rotary kiln and
The soil import of hot arc cavity is connected in residual heat using device；The flue gas emission mouth and flue gas segregative line of direct thermal desorption rotary kiln
System is connected, and the gas vent of cold section of cavity is connected with flue gas purification system in residual heat using device.
2. the apparatus according to claim 1, which is characterized in that the flue gas purification system includes sequentially connected whirlwind point
From device, dual firing chamber, chilling tower, dust-removal cloth-bag and eluting column；Wherein, the flue gas emission mouth and whirlwind on direct thermal desorption rotary kiln
The entrance of separator is connected, and the gas vent of cold section of cavity is connected with the entrance of dust-removal cloth-bag in residual heat using device, eluting column
Top sets exhaust outlet.
3. the apparatus according to claim 1, which is characterized in that the both ends of the rotation axis are connected to by circulation line to be followed
Ring pump, for driving conduction oil to circulate inside rotation axis.
4. device according to claim 3, which is characterized in that the circulation line is attached to the container of residual heat using device
On wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820430280.3U CN208230523U (en) | 2018-03-28 | 2018-03-28 | Enter the device of kiln soil using the soil waste heat desiccation after thermal desorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820430280.3U CN208230523U (en) | 2018-03-28 | 2018-03-28 | Enter the device of kiln soil using the soil waste heat desiccation after thermal desorption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208230523U true CN208230523U (en) | 2018-12-14 |
Family
ID=64585511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820430280.3U Active CN208230523U (en) | 2018-03-28 | 2018-03-28 | Enter the device of kiln soil using the soil waste heat desiccation after thermal desorption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208230523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108435776A (en) * | 2018-03-28 | 2018-08-24 | 中国计量大学 | Enter the device and method of kiln soil using the soil waste heat desiccation after thermal desorption |
-
2018
- 2018-03-28 CN CN201820430280.3U patent/CN208230523U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108435776A (en) * | 2018-03-28 | 2018-08-24 | 中国计量大学 | Enter the device and method of kiln soil using the soil waste heat desiccation after thermal desorption |
| CN108435776B (en) * | 2018-03-28 | 2023-12-12 | 中国计量大学 | Device and method for drying kiln-entering soil by utilizing waste heat of soil after thermal desorption |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108435776A (en) | Enter the device and method of kiln soil using the soil waste heat desiccation after thermal desorption | |
| CN104607455B (en) | A kind of organic polluted soil Multi-stage heat desorption repair system | |
| CN102615097B (en) | System for drying persistent organic pollutants polluted soil through flue gas waste heat | |
| CN104772114B (en) | A kind of organic adsorption saturated activity charcoal regenerating unit | |
| CN102311216B (en) | Separated thermal cycle sludge dry method and device thereof | |
| CN105776806B (en) | Sludge drying tower and sludge drying method | |
| CN108372197A (en) | A kind of combination process based on thermal desorption for pollution administration soil | |
| CN105598151A (en) | Thermal-desorption soil restoring device | |
| CN105276608B (en) | A kind of brown coal drying waste heat and water reclamation system | |
| CN111558611B (en) | Negative pressure thermal desorption treatment system for mercury contaminated soil | |
| CN106642137A (en) | Vertical sludge drying, gasifying and incinerating integrated treatment device and method | |
| CN208230523U (en) | Enter the device of kiln soil using the soil waste heat desiccation after thermal desorption | |
| CN209279727U (en) | A kind of waste heat of boiler tail gas heat-exchanger rig | |
| CN207845466U (en) | A kind of energy-saving sludge processing unit | |
| CN105300042A (en) | Agricultural product drying equipment | |
| CN103693837A (en) | Sludge dryer | |
| CN207483602U (en) | A kind of sludge desiccation processing equipment | |
| CN205590537U (en) | Sludge drying tower | |
| CN105927989B (en) | A kind of pretreatment type Disposal System of Mud Burning | |
| CN211462398U (en) | Biochar preparation system | |
| CN100557329C (en) | A kind of windspout segregated combustion heat-storing tubular oven | |
| CN208362154U (en) | A kind of sludge treatment equipment | |
| CN201695000U (en) | Sludge treatment system | |
| CN201081261Y (en) | Heater stove | |
| CN206018671U (en) | A kind of exhaust-gas treatment structure for being applied to incinerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |