CN208865357U - A kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil - Google Patents
A kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil Download PDFInfo
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- CN208865357U CN208865357U CN201821043276.8U CN201821043276U CN208865357U CN 208865357 U CN208865357 U CN 208865357U CN 201821043276 U CN201821043276 U CN 201821043276U CN 208865357 U CN208865357 U CN 208865357U
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- contaminated soil
- containing mercury
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Abstract
The utility model relates to tail gas clean-up technical fields, provide a kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil, including dust multi-stage spray tower group, condensing unit, gas-liquid separation device, exhaust gas processing device, circulation water recycling device and wastewater treatment equipment；Multi-stage spray tower group is connected to condensing unit, condensing unit is connected to gas-liquid separation device, and gas-liquid separation device is connected to exhaust gas processing device, and circulation water recycling device one end is connected to exhaust gas processing device, the other end is connected to multi-stage spray tower group, and wastewater treatment equipment is connected to circulation water recycling device.The utility model can gradually decrease the temperature in tail gas by the cooperation of multi-stage spray tower group, condensing unit, gas-liquid separation device, exhaust gas processing device, circulation water recycling device and wastewater treatment equipment, reduce energy consumption, exhaust gas processing device is located in process rearward, the load that can reduce exhaust gas processing device makes it possible to recycling.
Description
Technical field
The utility model relates to tail gas clean-up technical field, specially a kind of desorption tail gas of indirect thermal containing mercury contaminated soil is net
Change processing system.
Background technique
The organic of a large amount of mercury is produced and its can generated in the smelting process of smeltery in the mining containing mercury mineral
Object and inorganic matter, such as mercury chloride, mercuric sulfate, mercury fulminate, are particularly acute, such as mercury process in the pollution condition of some special industry mercury
Chlor-alkali plant, Organic Chemical Plant, coal-fired industrial furnace that catalyst is made of mercury salt etc..The country controls the mercury pollution of general industry at present
Reason means are as follows: in Mercury Emissions from Coal-Fired Boilers, for mercury pollution caused by fire coal, and flue gas after removing and burn before generally taking burning
Middle removing, flue gas removing generally cooperates with demercuration, denitrating flue gas using deduster collaboration demercuration, wet flue gas desulfurizer after burning
Device cooperates with demercuration, sorbent injection technology demercuration etc.；Condensation method, liquid absorption are then used for mercury vapour in chemical industry
The modes such as method, solid sorbent method, combined purifying method.The above mercuric pollution treatment means are that dirt is generated in domestic industry production process
It contaminates and carries out corresponding contamination control improvement.And in current soil remediation field, for being mercury-contaminated permeable soil, for by mercury
Thoroughly separated from soil, it can be general using indirectly de- the characteristics of certain temperature is volatilized according to mercury and mercuric compounds
Attached technology, mercury contaminated soil is heated, and makes mercury in soils and its compound be able to volatilize or separate from soil, the mercury in soil
Pollutant is separated from soil under condition of negative pressure.Generate a large amount of thermal desorption gas in this process, thermal desorption gas mainly at
Dividing is vapor, dust, mercury and mercuric compounds and air, and needing to adopt an effective measure carries out tail gas clean-up processing, it is ensured that tail
Gas qualified discharge, avoids secondary pollution.
It is actually rare for mercurous thermal desorption tail gas clean-up technology at present, it is badly in need of exploitation and is applicable in mercurous thermal desorption tail gas
Purification system can really realize the tail gas unit that waste water and gas zero-emission, system energy consumption are low, stable.
Utility model content
The purpose of this utility model is to provide a kind of desorption tail gas cleaning treatment systems of indirect thermal containing mercury contaminated soil, lead to
Cross multistage spray column group, condensing unit, gas-liquid separation device, exhaust gas processing device, circulation water recycling device and wastewater treatment
The cooperation of device can gradually decrease the temperature in tail gas, reduce energy consumption, exhaust gas processing device is located in process rearward,
The load that can reduce exhaust gas processing device makes it possible to recycling, can save resource by recycling water recycling device.
To achieve the above object, the utility model embodiment provides the following technical solutions: one kind is indirect containing mercury contaminated soil
Thermal desorption tail gas clean-up processing system, including the dust multi-stage spray tower in the temperature for reducing tail gas and removing tail gas
Group, the condensing unit of the compound containing mercury for cooling down and collecting condensation, for the gas-liquid separation device of gas-liquid separation, for locating
The exhaust gas processing device for managing remaining mercury compound, for recycling the circulation water recycling device of water resource, and for handling
The wastewater treatment equipment of waste water and waste residue；The multi-stage spray tower group is connected to the condensing unit, the condensing unit and institute
Gas-liquid separation device connection is stated, the gas-liquid separation device is connected to the exhaust gas processing device, the circulation water recycling device
One end is connected to the exhaust gas processing device, and the other end is connected to the multi-stage spray tower group, the wastewater treatment equipment and institute
State circulation water recycling device connection.
Further, the multi-stage spray tower group includes level-one spray column and second level spray column, in the level-one spray column by
The first slurry pool, the first smoke inlet, the first spraying layer and the first packing layer, the second level spray are disposed on down
Tower is from bottom to top disposed with the second slurry pool, the second smoke inlet, the second packing layer, the second spraying layer and demisting layer；
Untreated tail gas is entered in the level-one spray column by first smoke inlet, the gas vent of the level-one spray column
It is connected to by pipeline with second smoke inlet, the gas vent of the second level spray column passes through pipeline and the condensing unit
Gas access connection.
Further, the wastewater treatment equipment includes the filter press for handling the soda acid chemicals feeder and processing waste residue of waste water,
The liquid outlet of the soda acid chemicals feeder is connected to the liquid inlet of first slurry pool.
Further, the condensing unit includes condenser and water cooling unit, and the condenser is connected to the water cooling unit, institute
The gas vent for stating condenser is connected to by pipeline with the gas access of the gas-liquid separation device.
Further, the gas-liquid separation device includes gas-liquid separator, and the gas vent of the gas-liquid separator passes through pipe
Road is connected to the gas access of the exhaust gas processing device.
Further, the exhaust gas processing device includes active carbon adsorber, air-introduced machine and exhaust tube, and the active carbon is inhaled
The gas vent of adnexa is connected to by pipeline with the gas access of the air-introduced machine, the outlet of the air-introduced machine and the exhaust tube
Outlet.
Further, the circulation water recycling device includes multi-phase separation pond and Air-cooled Heat Exchanger, the multi-stage spray
The liquid outlet of tower group is connected to the liquid inlet in the multi-phase separation pond, the liquid outlet and the sky in the multi-phase separation pond
The liquid inlet of cold type heat exchanger is connected to, and the liquid outlet of the Air-cooled Heat Exchanger and the liquid of the multi-stage spray tower group enter
Mouth connection.
Further, partition, scrapper conveyor and blender are installed in the multi-phase separation pond.
It further, further include the multistage spray for adjusting operating parameter and detecting several control devices of operating status
Drench tower group, the condensing unit, the gas-liquid separation device, the exhaust gas processing device, the circulation water recycling device and
The wastewater treatment equipment is mounted on the control device.
Further, the control device includes thermocouple, pressure transmitter, flowmeter, regulating valve and stop valve, described
Multi-stage spray tower group, the condensing unit, the gas-liquid separation device, the exhaust gas processing device, recirculated water reuse dress
It sets and the wastewater treatment equipment is mounted on the thermocouple, the pressure transmitter, the flowmeter, the regulating valve
And the stop valve.
Compared with prior art, the utility model has the beneficial effects that passing through multi-stage spray tower group, condensing unit, gas-liquid
Separator, exhaust gas processing device, circulation water recycling device and the cooperation of wastewater treatment equipment can gradually decrease in tail gas
Temperature, reduce energy consumption, exhaust gas processing device be located in process rearward, can reduce the load of exhaust gas processing device,
Recycling is made it possible to, resource can be saved by recycling water recycling device.
Detailed description of the invention
Fig. 1 is a kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil provided by the embodiment of the utility model
Structural schematic diagram；
In appended drawing reference: 1- level-one spray column；2- second level spray column；3- condenser；4- water cooling unit；5- gas-liquid separator；
6- recycles water recycling device；60- multi-phase separation pond；61- Air-cooled Heat Exchanger；7- wastewater treatment equipment；The first collector of 80-；
The second collector of 81-；9- active carbon adsorber；The second air-introduced machine of 10-；11- exhaust tube；12- control device；A- is unprocessed
Tail gas.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, the utility model embodiment provides a kind of desorption tail gas purified treatment of indirect thermal containing mercury contaminated soil
System, including multi-stage spray tower group, condensing unit, gas-liquid separation device, exhaust gas processing device, circulation water recycling device 6 and
Wastewater treatment equipment 7.Wherein, the multi-stage spray tower group, for reducing the dust in the temperature and removing tail gas of tail gas；Institute
Condensing unit is stated, for treated that tail gas further cools down by the multi-stage spray tower group, and collects the mercurous chemical combination of condensation
Object；The gas-liquid separation device, for by the drop separation in the condensing unit treated tail gas and collection；The tail gas
Processing unit, for handling remaining mercury compound in the tail gas after the gas-liquid separation；The circulation water recycling device 6, is used for
By reuse after the liquid handling generated in the multi-stage spray tower group into the multi-stage spray tower group；The wastewater treatment equipment
7, for handling waste water and waste residue in the circulation water recycling device 6；The multi-stage spray tower group is connected to the condensing unit,
The condensing unit is connected to the gas-liquid separation device, and the gas-liquid separation device is connected to the exhaust gas processing device, institute
It states circulation 6 one end of water recycling device to be connected to the exhaust gas processing device, the other end is connected to the multi-stage spray tower group, described
Wastewater treatment equipment 7 is connected to the circulation water recycling device 6.In the present embodiment, tail gas be introduced into multi-stage spray tower again into
Enter condensing unit, the temperature of tail gas can be reduced step by step, avoiding disposably reduces and bring energy loss, and by more
Grade spray column can also remove the dust of the overwhelming majority in tail gas, using the condensation of condensing unit, according to compound containing mercury
The characteristic of gas, low temperature can be allowed to be condensed into liquid, so that the bottom of condensing unit is enriched to, convenient for being disposed off.In addition,
Exhaust gas processing device is placed in system each process more rearward position by this system, is because in preceding several processes in tail gas
Dust, compound containing mercury etc. be processed almost, then after carrying out precision processing by exhaust gas processing device
It is discharged into natural environment to suffer, but also the burden of exhaust gas processing device can be mitigated, enable service life extension, can repeatedly make
With.The circulation water recycling device 6 of use recycles after capable of being handled the liquid generated in multi-stage spray tower process, saves
Water resource.
As the prioritization scheme of the utility model embodiment, referring to Fig. 1, the multi-stage spray tower group includes level-one spray
Tower 1 and second level spray column 2, be from bottom to top disposed in the level-one spray column 1 first slurry pool, the first smoke inlet,
First spraying layer and the first packing layer, the second level spray column 2 are from bottom to top disposed with the second slurry pool, the second flue gas
Entrance, the second packing layer, the second spraying layer and demisting layer；Untreated tail gas a enters institute by first smoke inlet
It states in level-one spray column 1, the gas vent of the level-one spray column 1 is connected to by pipeline with second smoke inlet, described
The gas vent of second level spray column is connected to by pipeline with the gas access of the condensing unit.In the present embodiment, using two
Grade spray column carries out processing one step ahead to tail gas, and wherein the temperature of tail gas can be reduced to 90 by 350 DEG C by level-one spray column 1
DEG C or so, the temperature of tail gas can be further reduced to 60 DEG C or so in second level spray column 2, so enter back into condenser 3
Further cooling would not cause too big load to condenser 3 in just, and gas speed control is in 3~5m/ in level-one spray column 1
S, it is abundant can so to guarantee that the spray liquid in tail gas and spray column carries out in 2~3m/s for gas speed control in second level spray column 2
Contact, in tail gas 99.5% dust can be removed.The slurries that the dust and liquid of removing are mixed to form can drop into the first slurry
Be collected in liquid pool and the second slurry pool, wait it is to be processed after utilize again.When initial, negative pressure can be generated using the first air-introduced machine
Tail gas is sucked in level-one spray column 1, the efficiency for slowly influencing to remove to prevent tail gas from entering naturally.
Above scheme is advanced optimized, referring to Fig. 1, the wastewater treatment equipment 7 includes the soda acid dosing of processing waste water
The liquid inlet of machine and the filter press for handling waste residue, the liquid outlet of the soda acid chemicals feeder and first slurry pool connects
It is logical.In the present embodiment, the waste water that can be generated after circulation water recycling device 6 is handled, that is, mix the oil slick of oily substance, with
And waste residue, i.e., remaining filter residue, wherein oil slick drains into the first slurry by soda acid agent-feeding treatment and after handling qualification by the first water pump
It is reused in liquid pool as shower water, filter residue, which then passes through to be transferred in indirect thermal desorption system after filter press dehydration, to carry out
Depth heat treatment.
As the prioritization scheme of the utility model embodiment, referring to Fig. 1, the condensing unit include condenser 3 and
Water cooling unit 4, the condenser 3 are connected to the water cooling unit 4, and the gas vent of the condenser 3 passes through pipeline and the gas-liquid
The gas access of separator is connected to.In the present embodiment, condenser 3 can reduce the tail gas to come in second level spray column 2
To 5 DEG C, gaseous compound containing mercury condenses into liquid, is enriched to 3 bottom of condenser, enters the first collector by self-flowing effect
In 80, the coolant media of condenser 3 is cooled down using water cooling unit 4.
As the prioritization scheme of the utility model embodiment, referring to Fig. 1, the gas-liquid separation device includes gas-liquid separation
The gas vent of device 5, the gas-liquid separator 5 is connected to by pipeline with the gas access of the exhaust gas processing device.In this reality
It applies in example, which can remove 30 μm or more of water droplet, so that drop is less than in tail gas after gas-liquid separation
75mg/Nm3, drop can be by flowing into the second collector 81 certainly.
As the prioritization scheme of the utility model embodiment, referring to Fig. 1, the exhaust gas processing device includes that active carbon is inhaled
Adnexa 9, air-introduced machine and exhaust tube 11, the gas vent of the active carbon adsorber 9 pass through the gas of pipeline and the air-introduced machine
The connection of body entrance, the outlet of the air-introduced machine and the outlet of the exhaust tube 11.In the present embodiment, active carbon can incite somebody to action
Remaining compound containing mercury absorption, that is, can reach discharge standard, and air-introduced machine at this time is the second air-introduced machine 10, by the second air-introduced machine
After 10 are up to the gas extraction of standard, it is emitted into atmospheric environment by exhaust tube 11.It is remaining when due to the activated carbon adsorption
Compound containing mercury it is seldom, so not will cause scrapping for active carbon, can be used for multiple times.
As the prioritization scheme of the utility model embodiment, referring to Fig. 1, the circulation water recycling device 6 includes multiphase
Separate tank 60 and Air-cooled Heat Exchanger 61, the liquid of the liquid outlet of the multi-stage spray tower group and the multi-phase separation pond 60
Entrance connection, the liquid outlet in the multi-phase separation pond 60 are connected to the liquid inlet of the Air-cooled Heat Exchanger 61, the sky
The liquid outlet of cold type heat exchanger 61 is connected to the liquid inlet of the multi-stage spray tower group.In the present embodiment, multi-phase separation
The separation of mixed liquor is completed in pond 60 by way of " flocculation sedimentation+air bearing ", it is preferred that in multi-phase separation pond 60 using every
Plate, scrapper conveyor and blender carry out the separation of filter residue and mixed liquor, which is the prior art, do not describe in detail herein,
Liquid after separation, which is then sent into recirculated water Air-cooled Heat Exchanger 61, to exchange heat, solution temperature be down to after 30 DEG C by first
Water pump reuse is used into level-one spray column 1 and second level spray column 2 as spraying cooling water.
As the prioritization scheme of the utility model embodiment, this system further includes for adjusting operating parameter and detection operation
Several control devices 12 of state, the multi-stage spray tower group, the condensing unit, the gas-liquid separation device, the tail gas
Processing unit, the circulation water recycling device 6 and the wastewater treatment equipment 7 are mounted on the control device 12.At this
In embodiment, operating parameter and detection operating status are adjusted by control device 12, it can also match with PLC and computer
It closes and uses, can system more be automated, convenient for staff to the control of whole system.
Above scheme is advanced optimized, the control device 12 includes thermocouple, pressure transmitter, flowmeter, regulating valve
And stop valve, the multi-stage spray tower group, the condensing unit, the gas-liquid separation device, the exhaust gas processing device, institute
It states circulation water recycling device 6 and the wastewater treatment equipment 7 is mounted on the thermocouple, pressure transmitter, described
Flowmeter, the regulating valve and the stop valve.In the present embodiment, using the thermocouple to the heating amount of each device into
Row detection, is detected using amount of pressure of the pressure transmitter to each device, using the flowmeter to the stream of each device
Amount is detected, and is adjusted using each parameter of the regulating valve to each device, using the stop valve to the electricity of each device
Source is managed.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (10)
1. a kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil, it is characterised in that: including for reducing tail gas
Temperature and remove tail gas in dust multi-stage spray tower group, for cool down and collect condensation compound containing mercury condensation dress
It sets, for the gas-liquid separation device of gas-liquid separation, for handling the exhaust gas processing device of remaining mercury compound, for recycling
The circulation water recycling device of water resource, and the wastewater treatment equipment for handling waste water and waste residue；The multi-stage spray tower group
Be connected to the condensing unit, the condensing unit is connected to the gas-liquid separation device, the gas-liquid separation device with it is described
Exhaust gas processing device connection, described circulation water recycling device one end is connected to the exhaust gas processing device, the other end with it is described more
Grade spray column group connection, the wastewater treatment equipment are connected to the circulation water recycling device.
2. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as described in claim 1, it is characterised in that:
The multi-stage spray tower group includes level-one spray column and second level spray column, is from bottom to top disposed in the level-one spray column
First slurry pool, the first smoke inlet, the first spraying layer and the first packing layer, the second level spray column are from bottom to top successively set
It is equipped with the second slurry pool, the second smoke inlet, the second packing layer, the second spraying layer and demisting layer；Untreated tail gas by
First smoke inlet enters in the level-one spray column, and the gas vent of the level-one spray column passes through pipeline and described the
The gas vent of the connection of two smoke inlets, the second level spray column is connected to by pipeline with the gas access of the condensing unit.
3. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as claimed in claim 2, it is characterised in that:
The wastewater treatment equipment includes the filter press for handling the soda acid chemicals feeder and processing waste residue of waste water, the soda acid chemicals feeder
Liquid outlet is connected to the liquid inlet of first slurry pool.
4. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as described in claim 1, it is characterised in that:
The condensing unit includes condenser and water cooling unit, and the condenser is connected to the water cooling unit, the gas of the condenser
Outlet is connected to by pipeline with the gas access of the gas-liquid separation device.
5. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as described in claim 1, it is characterised in that:
The gas-liquid separation device includes gas-liquid separator, and the gas vent of the gas-liquid separator passes through pipeline and the vent gas treatment
The gas access of device is connected to.
6. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as described in claim 1, it is characterised in that:
The exhaust gas processing device includes active carbon adsorber, air-introduced machine and exhaust tube, the gas vent of the active carbon adsorber
It is connected to by pipeline with the gas access of the air-introduced machine, the outlet of the air-introduced machine and the outlet of the exhaust tube.
7. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as described in claim 1, it is characterised in that:
The circulation water recycling device includes multi-phase separation pond and Air-cooled Heat Exchanger, the liquid outlet of the multi-stage spray tower group with
The liquid inlet in the multi-phase separation pond is connected to, the liquid outlet in the multi-phase separation pond and the liquid of the Air-cooled Heat Exchanger
Entrance connection, the liquid outlet of the Air-cooled Heat Exchanger are connected to the liquid inlet of the multi-stage spray tower group.
8. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as claimed in claim 7, it is characterised in that:
Partition, scrapper conveyor and blender are installed in the multi-phase separation pond.
9. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as described in claim 1, it is characterised in that:
It further include for adjusting operating parameter and detecting several control devices of operating status, the multi-stage spray tower group, the condensation
Device, the gas-liquid separation device, the exhaust gas processing device, the circulation water recycling device and the wastewater treatment equipment
It is mounted on the control device.
10. one kind desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil as claimed in claim 9, feature exist
In: the control device includes thermocouple, pressure transmitter, flowmeter, regulating valve and stop valve, the multi-stage spray tower
Group, the condensing unit, the gas-liquid separation device, the exhaust gas processing device, the circulation water recycling device and described
Wastewater treatment equipment is mounted on the thermocouple, the pressure transmitter, the flowmeter, the regulating valve and described cuts
Disconnected valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821043276.8U CN208865357U (en) | 2018-06-29 | 2018-06-29 | A kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821043276.8U CN208865357U (en) | 2018-06-29 | 2018-06-29 | A kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil |
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| Publication Number | Publication Date |
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| CN208865357U true CN208865357U (en) | 2019-05-17 |
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ID=66462692
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| CN201821043276.8U Active CN208865357U (en) | 2018-06-29 | 2018-06-29 | A kind of desorption tail gas cleaning treatment system of indirect thermal containing mercury contaminated soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114993073A (en) * | 2022-05-30 | 2022-09-02 | 江苏省环境科学研究院 | Organic contaminated soil thermal desorption tail gas cooling device |
-
2018
- 2018-06-29 CN CN201821043276.8U patent/CN208865357U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114993073A (en) * | 2022-05-30 | 2022-09-02 | 江苏省环境科学研究院 | Organic contaminated soil thermal desorption tail gas cooling device |
| CN114993073B (en) * | 2022-05-30 | 2023-08-18 | 江苏省环境科学研究院 | Organic contaminated soil thermal desorption tail gas cooling device |
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