CN112275789A - Soil thermodynamic purification system - Google Patents
Soil thermodynamic purification system Download PDFInfo
- Publication number
- CN112275789A CN112275789A CN202011077855.6A CN202011077855A CN112275789A CN 112275789 A CN112275789 A CN 112275789A CN 202011077855 A CN202011077855 A CN 202011077855A CN 112275789 A CN112275789 A CN 112275789A
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- China
- Prior art keywords
- soil
- well
- gas
- combustion
- flue gas
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- 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.)
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- 239000002689 soil Substances 0.000 title claims abstract description 43
- 238000000746 purification Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 239000003546 flue gas Substances 0.000 claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 239000000779 smoke Substances 0.000 claims abstract description 15
- 239000002912 waste gas Substances 0.000 claims abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- 239000003345 natural gas Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000002918 waste heat Substances 0.000 abstract 3
- 238000007599 discharging Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000003900 soil pollution Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035558 fertility Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
Abstract
The invention discloses a soil thermodynamic purification system, which comprises: the system comprises a combustion well arranged underground and a collecting well arranged underground and used for collecting waste gas, wherein an outlet of the collecting well is communicated to a tail gas treatment device through a pipeline; the low-nitrogen combustor is characterized in that a gas channel, a combustion-supporting air channel and a flue gas backflow channel are sequentially arranged in a coaxial structure from inside to outside in the main body of the low-nitrogen combustor, and an outlet of the flue gas backflow channel is communicated to a flue gas heat exchanger through a pipeline; the smoke heat exchanger is arranged in the soil above the collecting well, and the outlet of the smoke heat exchanger is communicated to the inside of the collecting well. The invention effectively utilizes the waste heat of the flue gas, exchanges heat between the returned flue gas and the combustion-supporting air, and returns the heat to the combustion well again. The flue gas with the waste heat in the flue gas heat exchanger enters the collecting well, and the waste heat is reused to heat the soil around the collecting well, so that the energy consumption is effectively reduced. The tail gas treatment module is used for heating, burning and decomposing harmful organic matters discharged from the collecting well and then discharging the harmful organic matters.
Description
The technical field is as follows:
the invention relates to a soil thermodynamic purification system, and belongs to the technical field of soil purification.
Background art:
soil is a loose surface layer having fertility on the surface of the land and capable of growing plants. The soil not only provides mechanical support capability for plant growth, but also provides fertility factors such as water, fertilizer, gas, heat and the like required by the growth and development of the plant. As the population is rapidly increased and the industry is rapidly developed, solid wastes are continuously stacked and dumped on the surface of soil, harmful wastewater continuously permeates into the soil, and harmful gas and floating dust in the atmosphere continuously fall into the soil along with rainwater, so that the soil pollution is caused. The normal function of soil is hindered, the crop yield and quality are reduced, the human health is indirectly influenced through grains, vegetables, fruits and the like, and China does not make a special single-row law in the aspect of soil pollution prevention and control. Therefore, it can be said that the law of our country on soil pollution control is lack of systematicness and operability, and even the legislation in this respect is basically blank.
The soil thermodynamic purification technology is a technology for directly purifying soil in a polluted area without excavating, has the characteristics of low investment, capability of saving cost, no need of excavating and transporting polluted soil and small influence on the surrounding environment, and heats a polluted medium in the soil and pollutants contained in the polluted medium to a boiling point temperature through direct or indirect heat exchange so as to volatilize, separate or crack the polluted medium.
In traditional soil heating repair system, natural gas and air directly let in the combustor and burn, and tail gas passes through in the respective heater well that is connected with the combustor, passes to the heat to soil. And tail gas exhausted by each combustion well is collected together through a tail gas pipe and exhausted to the outside. Therefore, for the whole system, the energy of the tail gas of the combustion well is directly discharged along with the tail gas and is not utilized, so that the energy is wasted and the efficiency of the whole system is reduced; and part of harmful organic matters in the tail gas are directly discharged to the atmosphere without being fully heated and decomposed, thereby causing secondary pollution to the environment.
The invention content is as follows:
in order to overcome the defects of the prior art, the invention aims to provide a soil thermodynamic purification system, which solves the technical problems that combustion tail gas is directly discharged, energy is not effectively utilized, and heating efficiency is low, and treats the discharged tail gas to avoid environmental pollution.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a soil thermodynamic purification system, comprising:
a combustion well disposed underground, air within the combustion well being heated by a low nitrogen burner; and
the collecting well is arranged underground and used for collecting waste gas, and an outlet of the collecting well is communicated to the tail gas treatment device through a pipeline; the low-nitrogen combustor is characterized in that a gas channel, a combustion-supporting air channel and a flue gas backflow channel are sequentially arranged in a coaxial structure from inside to outside in the main body of the low-nitrogen combustor, and an outlet of the flue gas backflow channel is communicated to a smoke heat exchanger through a pipeline;
the smoke heat exchanger is arranged in the soil above the collecting well, and the outlet of the smoke heat exchanger is communicated to the inside of the collecting well.
Preferably, a flow guiding fan is further arranged in a connecting pipeline between the collecting well and the tail gas treatment device and used for generating negative pressure in the collecting well.
Preferably, the tail gas treatment device is provided with a tail gas burner, the tail gas burner is provided with a gas inlet pipe, a combustion air inlet pipe, an igniter and a flame detector, the gas inlet pipe is provided with a safety valve and a proportional valve, the combustion air inlet pipe is provided with an adjusting valve, and the igniter, the flame detector, the safety valve, the proportional valve and the adjusting valve are electrically controlled and are connected to a flame controller to be automatically controlled by the flame controller.
Preferably, the low-nitrogen burner is fueled by natural gas, a safety valve and a proportional valve are arranged in a natural gas pipeline, a regulating valve is arranged in a combustion air pipeline of the low-nitrogen burner, and the low-nitrogen burner is also provided with an igniter and a flame detector and is automatically controlled by a flame controller.
Preferably, a sealing treatment device is arranged on the surface of the soil purification area to prevent harmful organic matters and heat from escaping.
Compared with the prior art, the invention has the beneficial effects that:
1. realizes the thermodynamic purification treatment of the soil on site, and the sealing treatment of the soil surface prevents harmful organic matters from escaping.
2. Recycling the heat of the flue gas, and preheating the downward combustion-supporting air and natural gas by the upward return flue gas in the low-nitrogen combustor; the backflow flue gas heating smoke heat exchanger further heats the surrounding soil, and the backflow flue gas enters the collecting well to heat the surrounding soil, so that energy is saved.
3. The tail gas is burnt and treated, the harmful organic matters are thoroughly decomposed, and the environment-friendly emission is realized.
Description of the drawings:
FIG. 1 is a schematic diagram of the thermodynamic soil purification system
FIG. 2 is a schematic diagram of heat exchange between hot smoke and combustion air of the low-nitrogen burner
FIG. 3 is a schematic view of a smoke heat exchanger
Reference numbers in the figures: 1-a low nitrogen burner; 2. -a combustion well; 3-a flue gas outlet; 4-a smoke heat exchanger inlet; 5-a smoke heat exchanger; 6-collecting well; 7-a drainage fan; 8-a tail gas treatment device; 9-a tail gas burner; 10-safety valve; 11-a proportional valve; 12-a regulating valve; 13-a flame controller; 14-a flame detector; 15-sealing the ground; 16-contaminated soil; 21-combustion air channel; 22-flue gas return channel.
The present invention will be further described with reference to the following detailed description and accompanying drawings.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example, referring to the drawings, a soil thermodynamic purification system comprising:
a combustion well 2 arranged underground, wherein the air in the combustion well 2 is heated by a low-nitrogen burner 1; and
the underground collecting well 6 is used for collecting waste gas, and the outlet of the collecting well 7 is communicated to the tail gas treatment device 8 through a pipeline; the low-nitrogen combustor 1 is characterized in that a gas channel, a combustion-supporting air channel and a flue gas return channel are sequentially arranged in a coaxial structure from inside to outside in the main body, and the outlet of the flue gas return channel is communicated to the flue gas heat exchanger 5 through a pipeline;
the smoke heat exchanger 5 is arranged in the soil above the collecting well 6, and the outlet of the smoke heat exchanger 5 is communicated to the collecting well 6.
As shown in FIG. 1, a combustion well and a collection well are provided in the contaminated soil 16 area, and the surface 15 of the soil purification area is subjected to a sealing treatment, such as surface hardening, to prevent harmful organic substances and heat from escaping. The low-nitrogen combustor produces the heat in the burning well, heats soil 900 ℃ (temperature sensor monitoring), and the contaminated medium is heated, volatilizees, decomposes, collects in collecting the well under drainage fan 7's effect, finally gets into tail gas treatment module. The specific working principle is as follows, in the low-nitrogen combustor, combustion-supporting air and natural gas are combusted and ignited, the generated heat and flue gas enter a combustion well 2, the flue gas flows back through a burner, the combustion-supporting air is preheated, the flue gas is discharged through a flue gas outlet 3 and enters an inlet 4 of a flue gas heat exchanger, and the heat in the combustion well is conducted through soil heat to heat and volatilize and decompose harmful organic matters in the soil.
The tail gas treatment device 8 is internally provided with a tail gas combustor 9, the tail gas combustor is provided with a gas inlet pipe, a combustion-supporting air inlet pipe, an igniter and a flame detector 14, the gas inlet pipe is internally provided with a safety valve 10 and a proportional valve 11, the combustion-supporting air inlet pipe is internally provided with an adjusting valve 12, and the igniter, the flame detector 14, the safety valve 10, the proportional valve 11 and the adjusting valve 12 are electrically controlled and are connected to a flame controller 13 to be automatically controlled by the flame controller.
The low-nitrogen combustor 1 is fueled by natural gas, a safety valve 10 and a proportional valve 11 are arranged in a natural gas pipeline, a regulating valve 12 is arranged in a combustion air pipeline of the low-nitrogen combustor, and similarly, the low-nitrogen combustor 1 is provided with an igniter and a flame detector 14, and the automatic control of the low-nitrogen combustor is realized by a flame controller 13.
It should be noted that the detailed description of the present invention is not included in the prior art, or can be directly obtained from the market, and the detailed connection method thereof has an extremely wide application in the field or daily life without any creative effort, and will not be described in detail herein.
Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make variations, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (5)
1. A soil thermodynamic purification system, comprising:
the combustion well (2) is arranged underground, and air in the combustion well (2) is heated by the low-nitrogen combustor (1); and
the underground collecting well (6) is used for collecting waste gas, and an outlet of the collecting well (7) is communicated to the tail gas treatment device (8) through a pipeline; the low-nitrogen combustor (1) is characterized in that a gas channel, a combustion air channel and a flue gas return channel are sequentially arranged in a coaxial structure from inside to outside in the main body, and the outlet of the flue gas return channel is communicated to a smoke heat exchanger (5) through a pipeline;
the smoke heat exchanger (5) is arranged in the soil above the collecting well (6), and the outlet of the smoke heat exchanger (5) is communicated to the inside of the collecting well (6).
2. A soil thermodynamic purification system according to claim 1, wherein a draught fan (7) is further provided in the connecting pipeline of the collection well (6) and the tail gas treatment device (8) for generating negative pressure in the collection well.
3. Thermodynamic soil purification system according to claim 1, characterized in that the tail gas treatment device (8) is provided with a tail gas burner (9) which is provided with a gas inlet pipe, a combustion air inlet pipe and an igniter and flame detector (14), the gas inlet pipe is provided with a safety valve (10) and a proportional valve (11), the combustion air inlet pipe is provided with a regulating valve (12), and the igniter, flame detector (14), safety valve (10), proportional valve (11) and regulating valve (12) are electrically controlled and are connected to and automatically controlled by a flame controller (13).
4. Thermodynamic soil purification system according to claim 1, characterized in that the low nitrogen burner (1) is fueled by natural gas and in that a safety valve (10) and a proportional valve (11) are provided in the natural gas line, and in that a regulating valve (12) is provided in the combustion air line of the low nitrogen burner, and in that likewise the low nitrogen burner (1) is provided with an igniter, a flame detector (14), the automatic control of which is effected by a flame controller (13).
5. A soil thermodynamic purification system according to claim 1, wherein a sealing treatment means is provided on the surface (15) of the soil purification area to prevent harmful organics and heat from escaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011077855.6A CN112275789A (en) | 2020-10-10 | 2020-10-10 | Soil thermodynamic purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011077855.6A CN112275789A (en) | 2020-10-10 | 2020-10-10 | Soil thermodynamic purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112275789A true CN112275789A (en) | 2021-01-29 |
Family
ID=74421906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011077855.6A Pending CN112275789A (en) | 2020-10-10 | 2020-10-10 | Soil thermodynamic purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112275789A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009066492A (en) * | 2007-09-11 | 2009-04-02 | Takenaka Komuten Co Ltd | System for making contaminated soil harmless |
| CN104245165A (en) * | 2012-02-24 | 2014-12-24 | 格兰特·格克勒 | Advanced thermal conductive heater system for environmental remediation and \ destruction of pollutants |
| CN104907326A (en) * | 2015-06-03 | 2015-09-16 | 江苏华讯环境科技有限公司 | Device and process for removing organic pollutants from soil and underground water in situ |
| CN106322368A (en) * | 2016-10-13 | 2017-01-11 | 王立臣 | Ultra-low nitrogen combustor and combustion method thereof |
| CN107520246A (en) * | 2017-09-26 | 2017-12-29 | 上海格林曼环境技术有限公司 | Burning heat transfer and residual neat recovering system for the thermal desorption reparation of contaminated site original position |
| CN107685073A (en) * | 2017-09-26 | 2018-02-13 | 上海格林曼环境技术有限公司 | A kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site |
| CN209196869U (en) * | 2018-12-01 | 2019-08-02 | 江苏振达环保科技有限公司 | RTO exhaust gas combustion-supporting system |
| CN111036664A (en) * | 2019-12-30 | 2020-04-21 | 上海市政工程设计研究总院（集团）有限公司 | Hierarchical integrated form dystopy thermal desorption device of multilayer |
| CN111266398A (en) * | 2020-01-22 | 2020-06-12 | 上海吾励环境技术有限公司 | Soil ex-situ remediation external heat double-position spiral type drying roasting kiln |
| CN111644453A (en) * | 2020-05-21 | 2020-09-11 | 中科鼎实环境工程有限公司 | In-situ thermal desorption system and method capable of reinjecting high-temperature flue gas |
-
2020
- 2020-10-10 CN CN202011077855.6A patent/CN112275789A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009066492A (en) * | 2007-09-11 | 2009-04-02 | Takenaka Komuten Co Ltd | System for making contaminated soil harmless |
| CN104245165A (en) * | 2012-02-24 | 2014-12-24 | 格兰特·格克勒 | Advanced thermal conductive heater system for environmental remediation and \ destruction of pollutants |
| CN104907326A (en) * | 2015-06-03 | 2015-09-16 | 江苏华讯环境科技有限公司 | Device and process for removing organic pollutants from soil and underground water in situ |
| CN106322368A (en) * | 2016-10-13 | 2017-01-11 | 王立臣 | Ultra-low nitrogen combustor and combustion method thereof |
| CN107520246A (en) * | 2017-09-26 | 2017-12-29 | 上海格林曼环境技术有限公司 | Burning heat transfer and residual neat recovering system for the thermal desorption reparation of contaminated site original position |
| CN107685073A (en) * | 2017-09-26 | 2018-02-13 | 上海格林曼环境技术有限公司 | A kind of concentrated combustion formula original position thermal desorption prosthetic device for contaminated site |
| CN209196869U (en) * | 2018-12-01 | 2019-08-02 | 江苏振达环保科技有限公司 | RTO exhaust gas combustion-supporting system |
| CN111036664A (en) * | 2019-12-30 | 2020-04-21 | 上海市政工程设计研究总院（集团）有限公司 | Hierarchical integrated form dystopy thermal desorption device of multilayer |
| CN111266398A (en) * | 2020-01-22 | 2020-06-12 | 上海吾励环境技术有限公司 | Soil ex-situ remediation external heat double-position spiral type drying roasting kiln |
| CN111644453A (en) * | 2020-05-21 | 2020-09-11 | 中科鼎实环境工程有限公司 | In-situ thermal desorption system and method capable of reinjecting high-temperature flue gas |
Non-Patent Citations (1)
| Title |
|---|
| 柳金海, 中国建材工业出版社 * |
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Application publication date: 20210129 |
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