CN206276718U - A kind of system of utilization stalk repairing organic heavy-metal composite pollution soil - Google Patents

A kind of system of utilization stalk repairing organic heavy-metal composite pollution soil Download PDF

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Publication number
CN206276718U
CN206276718U CN201621251511.1U CN201621251511U CN206276718U CN 206276718 U CN206276718 U CN 206276718U CN 201621251511 U CN201621251511 U CN 201621251511U CN 206276718 U CN206276718 U CN 206276718U
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China
Prior art keywords
stalk
outlet
soil
entrance
thermal desorption
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CN201621251511.1U
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Inventor
王惠惠
巴玉鑫
吴小飞
牛明杰
肖磊
吴道洪
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Shenwu Technology Group Corp Co Ltd
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Abstract

The utility model discloses the system using stalk repairing organic heavy-metal composite pollution soil.The system includes mixing arrangement, thermal desorption stove, mixing arrangement includes stalk entrance, contaminated soil entrance, mixture outlet, thermal desorption stove includes mixture inlet, high-temperature oil gas outlet, clean soil outlet, and mixture inlet is connected with the mixture outlet of mixing arrangement.The utility model can effectively remove the heavy metal and organic pollution in contaminated soil, both realize the recycling of heat, and the purpose of energy-saving and emission-reduction is can reach again, and easy to operate.

Description

A kind of system of utilization stalk repairing organic-heavy-metal composite pollution soil
Technical field
The utility model is related to technical field of soil remediation, more particularly to one kind using stalk come repairing organic-huge sum of money The system for belonging to combined contamination soil.
Background technology
In recent years, with the fast development and the adjustment of industrial pattern of Urbanization in China, most big and medium-sized cities are old The enterprises removes such as large quantities of chemical industry, smelting, the plating in city or closing, because these business equipments are outmoded, Industrial " three Waste " treatment Technology imperfection, causes to have left large stretch of heavily contaminated place.There is the heavy metal of high concentration mostly and have in these heavily contaminated places The combined pollution of machine thing.
Soil Fl, refers to during two or more pollutant coexists in soil, while the concentration of pollutant More than national standard of soil environment quality or reached influence soil environment quality level.The form of soil Fl is various more Sample, including the pollution of organic combined pollution, inorganic compounding and the pollution of organic and inorganic compounding etc..
In soil, water environment, single pollution is little, and overwhelming majority pollution is caused by multiple pollutant matter coexists Combined pollution.But the environmental effect of Single Pollution thing is pertained only to mostly about research both at home and abroad, to multiple pollutant matter institute shape Into environment combined pollution effect and its mechanism understanding it is also far from enough.There is pole in nature in organic pollution and heavy metal Big difference, causes the research for carrying out combined pollution effect and mechanism between organic pollution and heavy metal also to there is certain difficulty Degree.
For combined contamination soil, spininess heavy metal and organic matter carry out soil remediation treatment respectively.At present, can use The chemical restoration such as chemical leaching method and hot-fixing realizes the removing of combined pollutant in contaminated soil simultaneously.Wherein, adopt When using chemical leaching method, because heavy metal differs greatly with organic matter, single eluant, eluent elutes heavy metal and organic matter at the same time When, there is certain limitation, also there is certain requirement to soil property, and eluent needs further treatment.When using thermal desorption skill During art, the volatile mercury of volatility and half volatile organic contaminant and part, arsenic can be effectively removed, but most of weights Metal cannot be removed.And biological prosthetic processing cost is low, it is adaptable to the organic matter of large area-heavy-metal contaminated soil reparation, but It is long processing period, has certain requirement to the condition of soil, is mostly used for the soil of low concentration pollution.
To sum up, the ripe application technology that can be used for organic matter-heavy-metal composite pollution soil remediation is lacked at present, it is external The combined pollution of research is repaired and generally requires to be combined two or more technology simultaneously, exist processing cost it is high, The problem of complexity of constructing, it is difficult to carry out large-scale promotion.
Prior art one discloses a kind of method of eluting and renovating soil with heavy metal-organic matter combined pollution, its leacheate Can remediating heavy metal-organic compound contaminated simultaneously soil, but leacheate is single, can only complexing moiety heavy metal, to having The washout rate of organic pollutants is than relatively low, and leacheate consumption is big, and the waste liquid after drip washing still needs to further treatment.
Prior art two discloses a kind of dystopy thermal desorption processing method of contaminated soil, and the method is for volatility and half The clearance of volatile organic matter can be stablized more than 95%, but heavy metal contaminated soil (except mercury) cannot be repaired.
Utility model content
In view of prior art exist problem, the utility model aim to provide one kind using stalk come repairing organic-weight The system of metal combined contamination soil.The technology that the utility model solves organic pollution and heavy metal pollution reparation simultaneously is asked Topic, technological process is simple, is swift in response.
The utility model provides a kind of system of utilization stalk repairing organic-heavy-metal composite pollution soil, described System includes mixing arrangement, thermal desorption stove;
The mixing arrangement includes stalk entrance, contaminated soil entrance, mixture outlet;
The thermal desorption stove includes mixture inlet, high-temperature oil gas outlet, the outlet of clean soil, the mixture inlet with The mixture outlet connection of the mixing arrangement.
Further, there is regenerative gas radiant tube, the regenerative gas radiant tube is located in the thermal desorption stove On the furnace wall of the thermal desorption stove;
Combustible gas entrance is additionally provided with the thermal desorption stove, fuel gas inlet, exhanst gas outlet is helped.
In above-mentioned system, combustion chamber is further included, the combustion chamber includes that high-temperature oil gas entrance, high-temperature flue gas go out Mouthful, the high-temperature oil gas entrance is connected with the high-temperature oil gas outlet of the thermal desorption stove.
In above-mentioned system, stalk fragmentation cell is further included, the stalk fragmentation cell is by breaker, vibratory sieve structure Into;There is the stalk fragmentation cell feed(raw material)inlet, stalk to export, and the stalk exports the stalk entrance with the mixing arrangement Connection.
In above-mentioned system, contaminated soil pretreatment unit is further included, the contaminated soil pretreatment unit is by crushing Device, vibratory sieve, drying unit are constituted;The contaminated soil pretreatment unit has feed(raw material)inlet, high-temperature flue gas entry, pollution Soil outlet, low-temperature flue gas outlet, the contaminated soil outlet are connected with the contaminated soil entrance of the mixing arrangement, the height Warm smoke inlet is connected with the high-temperature flue gas outlet of the combustion chamber.
In above-mentioned system, further include biological treatment device, the biological treatment device include low-temperature flue gas entrance, Purifying smoke is exported, and the low-temperature flue gas entrance is connected with the low-temperature flue gas outlet of the contaminated soil pretreatment unit.
The utility model can be realized being processed while agricultural crop straw and organic matter-heavy-metal composite pollution soil, utilize Stalk is pyrolyzed the discharged heat of the high-temperature oil gas burning for producing, and drying and processing is carried out to contaminated soil.
During stalk and organic matter-heavy-metal composite pollution soil are pyrolyzed in thermal desorption stove, relative material bed It is static.Flue gas in regenerative gas radiant tube is completely isolated with atmosphere in thermal desorption stove, it is to avoid the secondary dirt of product Dye.
Both the recycling for having realized heat of the present utility model, can reach the purpose of energy-saving and emission-reduction, it is adaptable to various again The repair process of soil types.
Brief description of the drawings
Fig. 1 is come the schematic flow sheet of repairing organic-heavy-metal composite pollution soil in the utility model using stalk.
Fig. 2 is come the system schematic of repairing organic-heavy-metal composite pollution soil in the utility model using stalk.
Reference in accompanying drawing is as follows:
1st, contaminated soil pretreatment unit;1 ', stalk fragmentation cell;2nd, mixing arrangement;3rd, thermal desorption stove;4th, combustion chamber; 5th, biological treatment device.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the present utility model is described in more details, with Just scheme of the present utility model and the advantage of its various aspects be better understood when.However, specific implementations described below Mode and embodiment are only descriptive purposes, rather than to limitation of the present utility model.
The utility model provides a kind of system of utilization stalk repairing organic-heavy-metal composite pollution soil.Such as Fig. 2 Shown, the system includes contaminated soil pretreatment unit 1, the ' of stalk fragmentation cell 1, mixing arrangement 2, thermal desorption stove 3, combustion chamber 4th, biological treatment device 5.The annexation of each device is as follows in the system:
Contaminated soil pretreatment unit 1 is made up of breaker, vibratory sieve, drying unit.Contaminated soil pretreatment unit 1 With feed(raw material)inlet, high-temperature flue gas entry, contaminated soil outlet, low-temperature flue gas outlet.Wherein, high-temperature flue gas entry and low temperature cigarette Gas outlet is located on drying unit.
The ' of stalk fragmentation cell 1 is made up of breaker, vibratory sieve.There is the ' of stalk fragmentation cell 1 feed(raw material)inlet, stalk to go out Mouthful.
Mixing arrangement 2 has stalk entrance, contaminated soil entrance, mixture outlet.Wherein, stalk entrance is crushed with stalk The stalk outlet connection of the ' of unit 1, contaminated soil entrance is connected with the contaminated soil outlet of contaminated soil pretreatment unit 1,
Thermal desorption stove 3 has mixture inlet, high-temperature oil gas outlet, clean soil outlet.Wherein, mixture inlet with it is mixed Attach together the mixture outlet connection for putting 2.High-temperature oil gas outlet is arranged at the furnace roof position of thermal desorption stove 3.Also, in thermal desorption Combustible gas entrance is additionally provided with stove 3, fuel gas inlet, exhanst gas outlet is helped.
Thermal desorption stove 3 includes radiation thermal desorption stove, regenerative gas radiant tube, distribution device, drawing mechanism, main equipment It is radiation thermal desorption stove.Wherein, regenerative gas radiant tube is located on furnace wall, is by way of burn combustible gas is with heat radiation The thermal desorption reaction of soil provides heat, and the atmosphere in radiant tube completely cuts off with the atmosphere in thermal desorption stove 3.
Combustion chamber 4 has high-temperature oil gas entrance, high-temperature flue gas outlet.Wherein, the height of high-temperature oil gas entrance and thermal desorption stove 3 Warm oil gas vent connection, high-temperature flue gas outlet is connected with the high-temperature flue gas entry of contaminated soil pretreatment unit 1.
There is biological treatment device 5 low-temperature flue gas entrance, purifying smoke to export.Wherein, low-temperature flue gas entrance and Polluted Soil The low-temperature flue gas outlet connection of earth pretreatment unit 1.
As shown in figure 1, in the utility model using stalk come the flow of repairing organic-heavy-metal composite pollution soil Schematic diagram.The technical solution of the utility model comprises the following steps:
(1) contaminated soil pretreatment
Contaminated soil is transported in the breaker in contaminated soil pretreatment unit 1 through feed(raw material)inlet and is crushed, Bulk inorganic matter therein is selected through Vibration Screen, such as brick, stone, big part glass metal product, by contaminated soil simultaneously The soil block of the ㎝ of particle diameter < 5 is broken into, and is transported in drying unit, drying and processing is carried out under the conditions of 80~110 DEG C so that soil The moisture content of earth is down to 25wt% (wt% is mass percent) below, is then exported through contaminated soil and discharged.
(2) agricultural crop straw is crushed
Agricultural crop straw raw material is transported in the ' of stalk fragmentation cell 1 through feed(raw material)inlet, is entered in breaker wherein Row break process, then selects the stalk of the ㎜ of particle diameter > 8 through Vibration Screen, is fed again into breaker, until stalk is broken Particle diameter≤8 ㎜ is broken to, is exported via stalk and discharged.
(3) mix
The contaminated soil entrance of mixing arrangement 2 is used to receive by the contaminated soil of contaminated soil outlet discharge, stalk entrance For receiving by the stalk of stalk outlet discharge so that the contaminated soil raw material and stalk through processing are in mixing arrangement 2 Mixed, the blended thing outlet discharge of the mixture for obtaining.
(4) thermal desorption
The mixture inlet of thermal desorption stove 3 be used for receive by mixture outlet discharge mixture so that contaminated soil and Stalk carries out thermal desorption reaction in thermal desorption stove 3.The temperature of thermal desorption reaction is 300~800 DEG C, and stalk is in thermal desorption stove High temperature action under pyrolysis be straw biological charcoal and high-temperature oil gas, straw biological charcoal is used to adsorb heavy metal in contaminated soil, Meanwhile, high temperature can promote the stabilization/immobilization of heavy metal.The high-temperature oil gas and organic pollution that produce are reacted by high temperature oil Gas outlet discharge.
The time of thermal desorption reaction is 30~60min, by the clean soil after thermal desorption and heavy metals immobilization, through cooling Backfill afterwards or transport outward.
(5) combustion reaction
The high-temperature oil gas entrance of combustion chamber 4 is used to receive the high-temperature oil gas by high-temperature oil gas outlet discharge and organic contamination Thing, high-temperature flue gas are produced by combustion reaction.The high-temperature flue gas of generation are pre-processed by high-temperature flue gas outlet via contaminated soil The high-temperature flue gas entry of unit 1 is delivered in drying unit, while realizing that contaminated soil is dried, high-temperature flue-gas reduction It is low-temperature flue gas.
(6) biological treatment
The low-temperature flue gas that above-mentioned steps are produced are delivered in biological treatment device 5 via low-temperature flue gas entrance, micro- wherein In the presence of biology, further resolution process is carried out to the pollutant in low-temperature flue gas, purified gas passes through smoke-purifying Gas outlet discharge, realizes the qualified discharge of tail gas.
Embodiment
The present embodiment is directed to organic matter and heavy-metal composite pollution thing, and voluntarily configuration contains heavy metal lead, cadmium and organic Thing benzanthracene, the composite analogy contaminated soil of phenol are subjects, carry out contaminated soil remediation treatment experiment.
In the present embodiment, the parameter that contaminated soil carries out thermal desorption treatment is:Treating capacity is 20t/d, and thermal desorption temperature is 600 DEG C, the thermal desorption time is 45min.The leaching that the content and heavy metal of organic matter in soil are determined after thermal desorption reaction is dense Degree.
Organic removal rate and leaching rate of heavy metals in the contaminated soil of table 1
Can be obtained by table 1, the utility model can utilize stalk, realize organic matter-heavy-metal composite pollution heavy metal in soil Removed while with Organic Pollution, and removal efficiency is high, it is easy to operate.
It should be noted that each embodiment above by reference to described by accompanying drawing is only used to illustrate the utility model rather than limit Scope of the present utility model is made, it will be understood by those within the art that, do not departing from spirit of the present utility model and model The modification carried out to the utility model on the premise of enclosing or equivalent, all should cover within the scope of the utility model. Additionally, signified outer unless the context, the word for occurring in the singular includes plural form, and vice versa.In addition, removing non-specifically Explanation, then all or part of of any embodiment can combine all or part of of any other embodiment and use.

Claims (6)

1. a kind of system of utilization stalk repairing organic-heavy-metal composite pollution soil, it is characterised in that the system includes Mixing arrangement, thermal desorption stove;
The mixing arrangement includes stalk entrance, contaminated soil entrance, mixture outlet;
The thermal desorption stove includes mixture inlet, high-temperature oil gas outlet, the outlet of clean soil, the mixture inlet with it is described The mixture outlet connection of mixing arrangement.
2. system according to claim 1, it is characterised in that there is regenerative gas radiant tube in the thermal desorption stove, The regenerative gas radiant tube is located on the furnace wall of the thermal desorption stove;
Combustible gas entrance is additionally provided with the thermal desorption stove, fuel gas inlet, exhanst gas outlet is helped.
3. system according to claim 1, it is characterised in that further include combustion chamber, the combustion chamber includes high temperature Oil gas entrance, high-temperature flue gas outlet, the high-temperature oil gas entrance are connected with the high-temperature oil gas outlet of the thermal desorption stove.
4. system according to claim 1, it is characterised in that further include stalk fragmentation cell, the stalk is broken single Unit is made up of breaker, vibratory sieve;There is the stalk fragmentation cell feed(raw material)inlet, stalk to export, stalk outlet with The stalk entrance connection of the mixing arrangement.
5. system according to claim 3, it is characterised in that further include contaminated soil pretreatment unit, the pollution Soil pretreatment unit is made up of breaker, vibratory sieve, drying unit;There is the contaminated soil pretreatment unit raw material to enter Mouth, high-temperature flue gas entry, contaminated soil outlet, low-temperature flue gas outlet, the contaminated soil export the dirt with the mixing arrangement Dye soil entrance connection, the high-temperature flue gas entry is connected with the high-temperature flue gas outlet of the combustion chamber.
6. system according to claim 4, it is characterised in that further include biological treatment device, the biological treatment Device includes low-temperature flue gas entrance, purifying smoke outlet, the low-temperature flue gas entrance and the contaminated soil pretreatment unit Low-temperature flue gas outlet connection.
CN201621251511.1U 2016-11-14 2016-11-14 A kind of system of utilization stalk repairing organic heavy-metal composite pollution soil Active CN206276718U (en)

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CN201621251511.1U CN206276718U (en) 2016-11-14 2016-11-14 A kind of system of utilization stalk repairing organic heavy-metal composite pollution soil

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Application Number Priority Date Filing Date Title
CN201621251511.1U CN206276718U (en) 2016-11-14 2016-11-14 A kind of system of utilization stalk repairing organic heavy-metal composite pollution soil

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108500045A (en) * 2018-03-29 2018-09-07 安徽理工大学 A kind of soil organic pollutant prosthetic appliance being provided with adjuvant adding device
CN109570215A (en) * 2018-10-15 2019-04-05 昆明理工大学 A kind of method of thermal desorption processing organic material contaminated soil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108500045A (en) * 2018-03-29 2018-09-07 安徽理工大学 A kind of soil organic pollutant prosthetic appliance being provided with adjuvant adding device
CN108500045B (en) * 2018-03-29 2020-05-12 安徽理工大学 Be provided with soil organic pollutant repair equipment that auxiliary material added device
CN109570215A (en) * 2018-10-15 2019-04-05 昆明理工大学 A kind of method of thermal desorption processing organic material contaminated soil

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GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155

Patentee after: Shenwu science and technology group Limited by Share Ltd

Address before: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155

Patentee before: Beijing Shenwu Environment Energy Technology Group Co., Ltd.

PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: System for utilize straw to restore organic matter heavy metal combined pollution soil

Effective date of registration: 20180322

Granted publication date: 20170627

Pledgee: The Bank of Beijing Limited by Share Ltd Anwar Road Branch

Pledgor: Shenwu science and technology group Limited by Share Ltd

Registration number: 2018990000210

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PP01 Preservation of patent right

Effective date of registration: 20190121

Granted publication date: 20170627