CN108405591A - The system and method that room temperature desorbs greenhouse treatment effeciency is improved using high temperature soil waste heat - Google Patents

The system and method that room temperature desorbs greenhouse treatment effeciency is improved using high temperature soil waste heat Download PDF

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Publication number
CN108405591A
CN108405591A CN201810450051.2A CN201810450051A CN108405591A CN 108405591 A CN108405591 A CN 108405591A CN 201810450051 A CN201810450051 A CN 201810450051A CN 108405591 A CN108405591 A CN 108405591A
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China
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soil
high temperature
heat
room temperature
greenhouse
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CN201810450051.2A
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Chinese (zh)
Inventor
杨崎峰
廖长君
和利钊
覃当麟
黎秋君
李琼
张海鸥
郑子健
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Guangxi Bossco Environmental Protection Technology Co Ltd
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Guangxi Bossco Environmental Protection Technology Co Ltd
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Priority to CN201810450051.2A priority Critical patent/CN108405591A/en
Publication of CN108405591A publication Critical patent/CN108405591A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09CRECLAMATION OF CONTAMINATED SOIL
    • B09C1/00Reclamation of contaminated soil
    • B09C1/06Reclamation of contaminated soil thermally
    • B09C1/065Reclamation of contaminated soil thermally by pyrolysis

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The system and method that room temperature desorbs greenhouse treatment effeciency is improved using high temperature soil waste heat the invention discloses a kind of, which includes heat-exchange system, room temperature desorption greenhouse ground heating system and soil dust pelletizing system, and it includes heating coil that room temperature, which desorbs greenhouse ground heating system,;Heat-exchange system includes heat exchange chute, heat exchange chute is connected with heating coil, soil dust pelletizing system includes dirt pocket, sealed dustproof canopy and transport riding track, one end of dirt pocket connects heat exchange chute, other end connection transportation riding track, sealed dustproof canopy is arranged in the top of dirt pocket, and sealed dustproof canopy is equipped with sprinkling equipment.The waste heat of high temperature soil is as heat source after the present invention repairs high temperature pyrolysis adsorption technology, the heating of greenhouse floor heating circulation water is desorbed for room temperature, soil cools down after realizing reparation while improving normal temperature desorption technique remediation efficiency, the treatment effeciency for improving room temperature desorption simultaneously, reduces investment outlay and operating cost.

Description

The system and method that room temperature desorbs greenhouse treatment effeciency is improved using high temperature soil waste heat
Technical field
It is specifically a kind of to improve room temperature desorption using high temperature soil waste heat the present invention relates to a kind of soil remediation technology field The system and method for greenhouse treatment effeciency.
Background technology
Soil is material base for the survival of mankind, is the important component of ecological environment.With the hair of industrial or agricultural The continuous expansion of exhibition and urbanization process, soil environment are worsening.Joined within 2014 according to Environmental Protection Department and Ministry of Land and Resources The data for closing the national Soil Pollution Investigation bulletin of publication show that national soil environment situation totally allows of no optimist, part Pollution of soil is heavier, and arable soil environmental quality causes anxiety, industry and mining discarded ground soil environment outstanding problem.In the dirt of soil Contaminate type in, organic contamination accounts for significant proportion, mainly at present with will discard retired industry and polluted enterprises It is generating in process of production, topple over discharge and leakage pollutant.Current contaminated place is mainly used for or will use In building resident living cell or other construction, the pollution situation in place becomes the major limiting factors built, seriously affects The production and living and ecological environment security of people, become environmental problem urgently to be resolved hurrily.
The peripheral doses technology that high temperature pyrolysis adsorption technology and normal temperature desorption technique are administered as organic polluted soil has suitable With range it is wide, it is simple for process it is easy to operate, be not seriously limited by the site, remediation efficiency is high, pollutant removal thoroughly and can be effectively prevent The advantages that administering the secondary pollution in repairing.But traditional high temperature pyrolysis is inhaled and normal temperature desorption technique exist in engineer application with Lower problem:
High temperature pyrolysis adsorption technology needs to use a large amount of combustion gas, fuel oil or fine coal during repairing and treating contaminated soil Ash is used as the energy, is reached a high temperature the effect of pyrolysis with improving temperature.For soil after reparation due to high temperature pyrolysis effect, temperature is excessively high It is not easy to transport, and soil particle is very thin, easy tos produce airborne dust and cause secondary pollution.
Due to mainly being operated at normal temperatures, temperature and region are affected normal temperature desorption technique to implementing to repair, the summer Season or weather temperature it is high regional remediation efficiency it is higher, higher pollutants removal rate can be reached, in autumn and winter or The low area of climate temperature is extremely difficult to ideal treatment effeciency and repairing effect.
And at present also there is not yet being combined for administering volatilization or half with normal temperature desorption technique using high temperature pyrolysis adsorption technology The related report of volatility organic polluted soil.
Invention content
It is improved at room temperature desorption greenhouse using high temperature soil waste heat technical problem to be solved by the invention is to provide a kind of The system and method for efficiency is managed, it combines high temperature pyrolysis adsorption technology with normal temperature desorption technique for administering volatilization or half volatile Organic polluted soil can make full use of waste heat, and improve remediation efficiency, prevent from generating secondary pollution in repair process.
The present invention solves above-mentioned technical problem with following technical solution:
The system that the present invention improves room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat, it includes heat exchange series System, room temperature desorption greenhouse ground heating system and soil dust pelletizing system, the room temperature desorption greenhouse ground heating system includes heating coil;Institute It includes heat exchange chute to state heat-exchange system, and heat exchange chute is used for the conveying and cooling of high temperature soil, heat exchange chute with Heating coil is connected, and realizes the circulating water heating in heating coil;The soil dust pelletizing system includes dirt pocket, sealed dustproof Canopy and transport riding track, one end connection heat exchange chute of dirt pocket, the other end connection transportation riding track of dirt pocket, dirt pocket Sealed dustproof canopy is arranged in top, and sealed dustproof canopy is equipped with for the sprinkling equipment to soil dedusting.
Room temperature desorption greenhouse ground heating system further include the face layer from top to bottom set gradually, filled layer, heat insulation layer and Damp-proof layer, the heating coil are placed in the top of heat insulation layer, filled layer are arranged between heating coil.
The heat exchange chute is made of seamless steel pipe, and both ends are respectively equipped with water high temperature resistant water pump and the resistance to height of return water Warm water pump.
The method that the present invention improves room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat, it includes that following operation walks Suddenly:
1) processing system is built:Heat-exchange system is installed, which includes fluid passage and soil transfer passage, The heating coil that fluid passage desorbs greenhouse ground heating system with room temperature is connected, the soil transfer passage and soil of heat-exchange system Dust pelletizing system connects;
2) start processing system:High temperature pyrolysis is inhaled in the high temperature soil feeding heat-exchange system after repairing and carries out hot friendship It changes, so that the soil moisture is down to 40 DEG C -50 DEG C, then soil is sent into after soil dust pelletizing system carries out spraying and dedusting and is transported outward;Heat exchange Afterwards from the fluid passage of heat-exchange system come out liquid enter room temperature desorb greenhouse ground heating system heating coil in and formed It circulates, while greenhouse ground temperature being made to increase.
In the step 2), it is 300 DEG C -350 DEG C that the high temperature pyrolysis, which inhales the high temperature soil after repairing,.
In the step 1), the fluid passage both ends of the heat-exchange system, which are equipped with, removes water high temperature resistant water pump and the resistance to height of return water Warm water pump removes the flow of water high temperature resistant water pump and return water high temperature resistant water pump by control, makes the feed water inlet temperature of grounding heat coil tube be 70 DEG C -80 DEG C, outlet temperature is 15 DEG C -25 DEG C.
Compared with prior art, the present invention has the advantages that:
1) waste heat of the high temperature soil after the present invention inhales reparation using high temperature pyrolysis as heat source, by heat-exchange system plus Recirculated water in hot greenhouse grounding heat coil tube improves the soil moisture, to improve the treatment effeciency of room temperature desorption, reduces simultaneously High temperature pyrolysis inhales the temperature of soil after reparation, and the soil moisture can be down to 40 DEG C -50 DEG C, and be transported outward after spraying and dedusting, scene Without airborne dust, anhydrous steam leakage, convenience in transport.
2) soil moisture after high temperature thermal desorption of the present invention is repaired is native after heat-exchange system up to 300 DEG C -350 DEG C Earth temperature is down to 40 DEG C -50 DEG C, and the circulating water temperature into normal temperature desorption booth grounding heat coil tube is 70 DEG C -80 DEG C, rate of heat exchange >=95%, the soil moisture in room temperature desorption greenhouse can be made to increase 30 DEG C -35 DEG C.
3) high temperature soil soil moisture after heat exchange chute carries out heat exchange after high temperature thermal desorption of the present invention is repaired 40 DEG C -50 DEG C are down to, is transported outward after spraying and dedusting;Scene is without airborne dust, anhydrous steam leakage.
4) high temperature pyrolysis adsorption technology and normal temperature desorption technique are combined by the present invention, not only realize the reasonable abundant profit of the energy With meeting the demand of the objective and development amphitypy society of China of environment remediation;But also realize that waste heat recycles, it not only improves and repaiies Cost has been saved in the implementation for journey of returning to work again;Meanwhile the combination of both high temperature pyrolysis adsorption technology and room temperature pyrolysis adsorption technology, break often Warm desorption technique is restricted by temperature condition, so that technique is no longer influenced by season and region, is improved repairing quality And remediation efficiency.
Description of the drawings
Fig. 1 is the process flow diagram that the present invention improves room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat.
Fig. 2 is the structural schematic diagram of room temperature desorption greenhouse ground heating system in Fig. 1.
Fig. 3 is the structural schematic diagram of heat-exchange system and the combination installation of soil dust pelletizing system in Fig. 1.
In figure:1- damp-proof layers, 2- heat insulation layers, 3- heating coils, 4- filled layers, 5- steel plate surface layers, 6- high temperature soil entrances, 7- heat exchange chutes, 8- soil dirt pockets, 9- soil transport riding tracks, 10- sealed dustproof canopies.
Specific implementation mode
Technical scheme of the present invention will be further described below in conjunction with the accompanying drawings:
As shown in Fig. 1-Fig. 3, the present invention improves the system packet of room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat Include heat-exchange system, room temperature desorption greenhouse ground heating system and soil dust pelletizing system, the knot of the room temperature desorption greenhouse ground heating system Structure as shown in Fig. 2, it includes heating coil 3, steel plate surface layer 5, filled layer 4, heat insulation layer 2 and damp-proof layer 1, fill by steel plate surface layer 5 Layer 4, heat insulation layer 2 and damp-proof layer 1 are arranged successively from top to bottom, and heating coil 3 uses parallel type, is placed in the top of heat insulation layer 2, adds Filled layer 4 is set between hot coil 3, and it is buried installation which, which desorbs greenhouse ground heating system,.
The structure of the heat-exchange system and soil dust pelletizing system is as shown in figure 3, heat-exchange system includes heat exchange chute 7, heat exchange chute 7 is equipped with circulating water channel and soil transfer passage, and the circulating water channel is connected with heating coil 3, institute One end connection high temperature soil entrance 6 of soil transfer passage is stated, the other end connects soil dust pelletizing system.The soil dust pelletizing system Including soil dirt pocket 8, sealed dustproof canopy 10 and transport riding track 9, one end of soil dirt pocket 8 connects heat exchange chute 7 Soil transfer passage, the other end connection transportation riding track 9 of dirt pocket 8, the top setting sealed dustproof canopy 10 of soil dirt pocket 8, Sealed dustproof canopy 10 is equipped with a plurality of spray header for soil dedusting.The heat-exchange system and soil dust pelletizing system use Built-in type is installed.
Heat exchange chute 7 of the present invention is made of seamless steel pipe, and both ends are installed respectively removes water high temperature resistant water pump With return water high temperature resistant water pump.
As shown in Figure 1, the method that the present invention improves room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat, including such as Lower operating procedure:
1) processing system is built:Heat-exchange system, room temperature desorption greenhouse ground heating system and soil dust pelletizing system are installed, specifically Structure is shown in Fig. 2 and Fig. 3;
2) start processing system:The soil (300 DEG C -350 DEG C) that high temperature pyrolysis is inhaled after repairing is passed through into high temperature soil entrance 6 Into the soil transfer passage of heat exchange chute 7, soil dirt pocket 8 is entered back into after heat exchange, is passed through in the process Heat exchange chute 7 heats the recirculated water in fluid passage, and the recirculated water after heating enters greenhouse grounding heat coil tube 3, while to entering The water temperature of greenhouse grounding heat coil tube 3 carries out real time on-line monitoring, and when temperature rises to 80 DEG C or so, water high-temperature resistant water is removed by control Pump and return water high temperature resistant water pump flow, make grounding heat coil tube feed water inlet temperature be 70 DEG C -80 DEG C, outlet temperature be 15 DEG C - 25℃。
After high temperature soil after high temperature pyrolysis suction reparation enters soil dirt pocket 8, the shower water of sealed dustproof canopy 10 is opened, After being dusted to soil, soil is transported through soil transport riding track 9 by forklift, sealed dustproof canopy 10 rises closed in the process Effect prevents the vapor that dust and spray generate in the process excessive.
The present invention inhales the high temperature soil after repairing using high temperature pyrolysis and desorbs room temperature in greenhouse floor heating after heat exchange Circulating water temperature is passed through after increasing in greenhouse grounding heat coil tube again, by carrying out heat exchange with the contaminated soil accumulated in greenhouse, is carried The high temperature of contaminated soil.The temperature that soil is also reduced while improving greenhouse floor heating temperature, after being reduced to temperature Soil carries out spraying and dedusting, in order to transport and prevent secondary pollution.
The heat insulation layer 2 of soil dust pelletizing system of the present invention is made of polystyrene foam plastics, with reduce heat to Under invalid diffusion.
For heat exchange chute 7 of the present invention using the seamless steel pipe of a diameter of 150mm, seamless steel pipe pipeline is heat pipe Road and with room temperature desorb greenhouse grounding heat coil tube be connected, both ends installation go water high temperature resistant water pump and return water high temperature resistant water pump work For the power water pump of floor heating circulation water;Go water high temperature resistant water pump that the water after heating is injected room temperature desorption greatly from heat exchange chute 7 Canopy grounding heat coil tube, return water high temperature resistant water pump by with the recirculated water after heat exchange in soil in greenhouse from normal temperature desorption booth grounding heat coil tube Re-injection makes recirculated water Repeat-heating to heat exchange chute 7.
It is the specific implementation case of the present invention below:
Soil waste heat is as heat source, heating after certain northern Polluted Soil repairing and treating place winter inhales reparation using high temperature pyrolysis Recirculated water in normal temperature desorption booth grounding heat coil tube heats the Polluted Soil in greenhouse, the main mesh of Polluted Soil in greenhouse It is benzene and naphthalene to mark pollutant;The amount that the project high temperature pyrolysis inhales rehabilitating soil is 20m3/ h, 320 DEG C of temperature of being unearthed, heat exchange flow Slot is 5 meters high, 2 meters wide, and 45 ° of materials of designed inclination angle degree are armored concrete;After heat exchange, the high temperature soil moisture is by 320 DEG C it is down to 55 DEG C;After heat exchange chute heat exchanger carries out heat exchange, normal temperature desorption booth grounding heat coil tube water inlet water temperature Reach 80 DEG C or so, water inlet flow 35m3/h-40m3/h;Greenhouse room temperature is positively retained at 30 DEG C or so, and the soil moisture is by original 0 DEG C -5 DEG C are increased to 35 DEG C or so;The seamless steel pipe of heat exchange chute heat exchanger selection diameter 150mm, tube spacing 100mm, Grounding heat coil tube selects crosslinked polyethylene pipe (PE-X), caliber 20mm, thickness 2mm, 0.94~0.95g/cm of density3, spacing is 250mm;After greenhouse grounding heat coil tube heat exchange, coil pipe outlet temperature is reduced to 22 DEG C or so;Pass through the system so that room temperature Desorption technique has broken the low condition limitation of northern China winter temperature, has obtained preferable treatment effect, has made going for pollutant Except rate has reached 95% or more.

Claims (6)

1. the system for improving room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat, it is characterised in that:It includes heat exchange System, room temperature desorption greenhouse ground heating system and soil dust pelletizing system, the room temperature desorption greenhouse ground heating system includes heating coil; The heat-exchange system includes heat exchange chute, and heat exchange chute is used for the conveying and cooling of high temperature soil, heat exchange chute It is connected with heating coil, realizes the circulating water heating in heating coil;The soil dust pelletizing system includes dirt pocket, closed anti- Dirt canopy and transport riding track, one end of dirt pocket connect heat exchange chute, the other end connection transportation riding track of dirt pocket, dirt pocket Top be arranged sealed dustproof canopy, sealed dustproof canopy be equipped with for the sprinkling equipment to soil dedusting.
2. the system for utilizing high temperature soil waste heat to improve room temperature desorption greenhouse treatment effeciency according to claim 1, feature It is:Room temperature desorption greenhouse ground heating system further includes the face layer from top to bottom set gradually, filled layer, heat insulation layer and moisture-proof Layer, the heating coil are placed in the top of heat insulation layer, filled layer are arranged between heating coil.
3. according to claim 1 or claim 2 improve the system that room temperature desorbs greenhouse treatment effeciency, spy using high temperature soil waste heat Sign is:The heat exchange chute is made of seamless steel pipe, and both ends are respectively equipped with water high temperature resistant water pump and the resistance to height of return water Warm water pump.
4. the method for improving room temperature desorption greenhouse treatment effeciency using high temperature soil waste heat, it is characterised in that:It includes following behaviour Make step:
1) processing system is built:Heat-exchange system is installed, which includes fluid passage and soil transfer passage, liquid The heating coil that channel desorbs greenhouse ground heating system with room temperature is connected, soil transfer passage and the soil dedusting of heat-exchange system System connects;
2) start processing system:High temperature pyrolysis is inhaled in the high temperature soil feeding heat-exchange system after repairing and carries out heat exchange, is made The soil moisture is down to 40 DEG C -50 DEG C, then soil is sent into after soil dust pelletizing system carries out spraying and dedusting and is transported outward;From heat after heat exchange The fluid passage of exchange system come out liquid enter room temperature desorption greenhouse ground heating system heating coil in and form recycle stream It is dynamic, while greenhouse ground temperature being made to increase.
5. the method for utilizing high temperature soil waste heat to improve room temperature desorption greenhouse treatment effeciency according to claim 4, feature It is:In the step 2), it is 300 DEG C -350 DEG C that the high temperature pyrolysis, which inhales the high temperature soil after repairing,.
6. the method for utilizing high temperature soil waste heat to improve room temperature desorption greenhouse treatment effeciency according to claim 4, feature It is:In the step 1), the fluid passage both ends of the heat-exchange system, which are equipped with, removes water high temperature resistant water pump and return water high temperature resistant Water pump removes the flow of water high temperature resistant water pump and return water high temperature resistant water pump by control, and it is 70 to make the feed water inlet temperature of grounding heat coil tube DEG C -80 DEG C, outlet temperature is 15 DEG C -25 DEG C.
CN201810450051.2A 2018-05-11 2018-05-11 The system and method that room temperature desorbs greenhouse treatment effeciency is improved using high temperature soil waste heat Withdrawn CN108405591A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN106363017A (en) * 2016-10-14 2017-02-01 同济大学 System and method for repairing polycyclic aromatic hydrocarbon contaminated soil
CN106560449A (en) * 2016-03-16 2017-04-12 中科鼎实环境工程有限公司 Thermal desorption spraying tower circulation spraying wastewater treatment, cooling and reuse system
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Inventor after: Yang Qifeng

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Inventor after: He Lizhao

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Inventor after: Li Qiujun

Inventor after: Li Qiong

Inventor after: Zhang Haiou

Inventor after: Zheng Zijian

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Inventor before: Liao Changjun

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