CN112246853A - Efficient energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil - Google Patents
Efficient energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil Download PDFInfo
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- CN112246853A CN112246853A CN202011074308.2A CN202011074308A CN112246853A CN 112246853 A CN112246853 A CN 112246853A CN 202011074308 A CN202011074308 A CN 202011074308A CN 112246853 A CN112246853 A CN 112246853A
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- CN
- China
- Prior art keywords
- kiln body
- thermal desorption
- shaped roller
- screen
- desorption kiln
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
- B07B1/24—Revolving drums with fixed or moving interior agitators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
Abstract
The invention discloses a high-efficiency energy-saving thermal desorption kiln body mechanism for restoring organic contaminated soil, which comprises: the double-cylinder kiln comprises a double-cylinder kiln body unit, sieve holes and a lifting blade, wherein the double-cylinder kiln body unit comprises a thermal desorption kiln body and a sieve-shaped roller for grading the particle size of large and small granular soil. Through the mode, the high-efficiency energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil disclosed by the invention has the advantages that the double-cylinder structure is utilized for grading the particle size of the soil, the desorption efficiency of fine particles is also improved in the desorption process of reinforced coarse particles, and the energy conservation and the efficiency improvement are realized.
Description
Technical Field
The invention relates to the field of soil remediation, in particular to efficient and energy-saving large modular thermal desorption kiln body equipment applied to remediation of organic contaminated soil.
Background
The heterotopic thermal desorption technology is one of the main technologies currently used for restoring organic contaminated soil, and can be divided into direct thermal desorption equipment and indirect thermal desorption equipment, wherein the former technology is more widely applied. One of the core units of the thermal desorption equipment is a soil thermal desorption kiln body, and the structural design of the thermal desorption equipment directly influences the efficiency of soil thermal desorption and the energy consumption of the system. At present, direct thermal desorption kiln bodies with various structures are developed at home and abroad, but the kiln bodies are of single-cylinder structures, and the internal design concept is that soil is fully contacted with high-temperature flue gas at other places by changing and optimizing the material raising plate structure of the kiln bodies, so that the repair efficiency is improved.
The organic contaminated soil often encounters two problems in the thermal desorption kiln body heating and repairing process:
firstly, because the piece is easily piled up to organic contaminated soil when single-cylinder rotary kiln rotates, only make soil pile body surface and the interior hot-air contact of kiln, the inside unable effectual and hot-air contact of soil pile body, soil and hot-air's heat transfer effect is relatively poor to rotary kiln energy consumption is higher when leading to reaching the predetermined temperature.
Secondly, because of the large difference of the soil particles/aggregates, the thermal desorption time required by the soil with different particle sizes is different, the large-particle thermal desorption time is long, and the small-particle thermal desorption time is relatively short. The structure of the single-cylinder thermal desorption kiln body can not realize the separation of the particle size at present, so that the desorption of the soil with the coarse particle size can be strengthened in a targeted manner. In order to ensure that the thicker particles can be effectively repaired to reach the standard, the desorption temperature can only be increased or the desorption time can only be accepted, and finally, the repair efficiency is low and the energy consumption is high.
Disclosure of Invention
The invention mainly solves the technical problem of providing the high-efficiency energy-saving thermal desorption kiln body mechanism for restoring the organic contaminated soil, has the advantages of high reliability, compact structure, high efficiency and the like, and has wide market prospect in the application and popularization of soil restoration.
In order to solve the technical problems, the invention adopts a technical scheme that:
the utility model provides a be used for prosthetic energy-efficient thermal desorption kiln body mechanism of organic contaminated soil, it includes: a double-cylinder kiln body unit, sieve pores and a material raising plate,
the double-cylinder kiln body unit comprises a thermal desorption kiln body and a screen-shaped roller for grading the particle size of the granular soil, the screen-shaped roller is concentrically arranged in the thermal desorption kiln body, the screen-shaped roller and the thermal desorption kiln body are connected and fixed by a connecting member, the diameter of the screen-shaped roller is smaller than that of the thermal desorption kiln body, a cavity is arranged between the inner wall of the thermal desorption kiln body and the outer wall of the screen-shaped roller,
the surface of the screen-shaped roller is provided with evenly distributed screen holes, the diameters of the screen holes are gradually changed from a feeding port to a discharging port of the screen-shaped roller,
the material raising plates are uniformly distributed in the sieve-shaped roller, the connecting ends of the material raising plates are welded with the sieve-shaped roller, and the material raising ends of the material raising plates are in a zigzag shape and extend towards the center of the sieve-shaped roller.
In a preferred embodiment of the invention, one end of the connecting member is welded with the thermal desorption kiln body, and the other end is welded with the screen-shaped roller.
In a preferred embodiment of the invention, the diameter of the sieve-shaped roller is 1/2 of the diameter of the thermal desorption kiln body.
In a preferred embodiment of the invention, the flame center of the thermal desorption burner is close to or located at the central axis of the screen drum.
In a preferred embodiment of the invention, the diameter of the sieve holes gradually decreases from the feeding opening to the discharging opening of the sieve-shaped roller.
In a preferred embodiment of the invention, the length of the material raising plate is about 1/3-1/4 of the diameter of the screen-shaped roller.
The invention has the beneficial effects that: the double-cylinder structure is utilized to carry out particle size classification on the soil, so that in the process of strengthening the desorption of coarse particles, the desorption efficiency of fine particles is improved, and energy conservation and efficiency improvement are realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic side view of a preferred embodiment of an efficient energy-saving thermal desorption kiln mechanism for organic contaminated soil remediation according to the present invention;
FIG. 2 is a schematic cross-sectional structural view of a preferred embodiment of the efficient energy-saving thermal desorption kiln mechanism for organic contaminated soil remediation of the present invention;
fig. 3 is a schematic structural diagram of a material raising plate in a preferred embodiment of the high-efficiency energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
Referring to fig. 1-3, an embodiment of the present invention includes:
a high-efficiency energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil provides a double-cylinder direct thermal desorption kiln body capable of realizing soil particle size classification, and in the process of strengthening desorption of coarse particles, the desorption efficiency of fine particles is improved, and energy conservation and efficiency improvement are realized. The invention is suitable for repairing large, medium and small organic polluted soil, has wide application range, is suitable for the characteristics of multiple pollutant types and complex pollution conditions of domestic organic pollution repair engineering, and is convenient for controlling the repair cost and improving the repair efficiency.
The utility model provides a be used for prosthetic energy-efficient thermal desorption kiln body mechanism of organic contaminated soil, includes 3 unit construction, wherein:
(1) double-cylinder structural kiln body unit
The double-cylinder structural kiln body unit comprises a thermal desorption kiln body 1 and a screen-shaped roller 2, the screen-shaped roller which is concentrically arranged is additionally arranged in the thermal desorption kiln body, the screen-shaped roller and the thermal desorption kiln body are fixedly connected through a connecting member 6, namely one end of the connecting member is welded with the thermal desorption kiln body, and the other end of the connecting member is welded with the screen-shaped roller. The connecting member can adopt a conventional connecting pipe, a connecting column and the like.
A cavity 3 is arranged between the inner wall of the thermal desorption kiln body and the outer wall of the screen-shaped roller, and the diameter of the screen-shaped roller is 1/2 of that of the thermal desorption kiln body.
The screen-shaped roller is used for layering soil with large and small particles or grading soil according to particle size so as to heat the soil, wherein the soil with coarse particles is positioned in the screen-shaped roller, and the soil with fine particles is positioned in the cavity. When the thermal desorption kiln body is in the operation process, the flame central line of thermal desorption combustor is located near sieve form cylinder center pin, because inside sieve form cylinder diameter is less, under the condition the same with outside cylinder angular velocity, the linear velocity of sieve form cylinder is very fast for the disturbance of coarse particle soil in the sieve form cylinder, the fine particle soil that raises and spills the frequency and be higher than in the cavity, thereby reach better heating effect, and played the effect of strengthening to the desorption of coarse particle soil.
Due to the existence of the screen-shaped roller, the fine particle soil scattered by the thermal desorption kiln body is interfered by the screen-shaped roller in the falling process, so that the residence time of the fine particle soil in the air is prolonged, the contact time of the fine particles and high-temperature flue gas is prolonged, and the thermal desorption efficiency of the fine particles is improved.
(2) Soil particle size grading unit
The soil particle size grading unit comprises sieve pores 4, the sieve pores are uniformly distributed on the surface of the sieve-shaped roller and are variable in diameter, and the diameters of the sieve pores are gradually reduced from a feeding port to a discharging port of the sieve-shaped roller.
In whole kiln body mechanism operation process, the rotational speed of inside sieve form cylinder is very fast, through the sieve mesh on sieve form cylinder surface, can effectively part coarse grain soil and fine particle soil, and the fine particle soil of abundant desorption passes through the sieve mesh and reaches in the cavity, and the coarse particle soil of insufficient desorption continues to carry out the desorption in sieve form cylinder, all reaches the desorption effect until whole soil to ensure that unearthed reaches the restoration standard.
(3) L-shaped lifting plate
The material raising plates 5 are evenly distributed on the inner wall of the screen-shaped roller in a circumferential mode, the connecting ends of the material raising plates are welded with the screen-shaped roller, the material raising ends of the material raising plates are in a sawtooth shape and extend towards the center of the screen-shaped roller, and the length of the material raising plates is 1/3-1/4 of the diameter of the screen-shaped roller.
The effect of lifting blade is mainly broken up the inside wet material that gets into the sieve form cylinder to can be easier snatch the material, and raise the material, make material and hot-air abundant contact as far as possible, can ensure that material advancing speed is synchronous with the coarse grain, avoid the material to block up in the sieve form cylinder and pile up.
The high-efficiency energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil has the beneficial effects that:
1. in the structural form, the double-cylinder type thermal desorption device is different from the existing single-cylinder structure thermal desorption form, can perform targeted reinforced desorption on the soil with different grain sizes, improves the heating efficiency and reduces the desorption time;
2. in terms of restoration efficiency, the gradually-reduced sieve pores are arranged on the surface of the roller in the double-cylinder kiln body, so that the soil with different particle sizes can be effectively distinguished, the desorption effect of coarse particles is enhanced, the contact time of the fine particles and high-temperature flue gas is prolonged, and the overall thermal desorption efficiency of the polluted soil is improved;
3. in the aspect of energy consumption, the desorption process of coarse particles is effectively strengthened, the desorption efficiency of fine particles is improved, the heating efficiency is improved, the desorption time is shortened by 10%, the energy conservation and the efficiency improvement are realized, and the energy consumption of thermal desorption operation is reduced by 5%.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a be used for prosthetic energy-efficient thermal desorption kiln body mechanism of organic contaminated soil which characterized in that includes: a double-cylinder kiln body unit, sieve pores and a material raising plate,
the double-cylinder kiln body unit comprises a thermal desorption kiln body and a screen-shaped roller for grading the particle size of the granular soil, the screen-shaped roller is concentrically arranged in the thermal desorption kiln body, the screen-shaped roller and the thermal desorption kiln body are connected and fixed by a connecting member, the diameter of the screen-shaped roller is smaller than that of the thermal desorption kiln body, a cavity is arranged between the inner wall of the thermal desorption kiln body and the outer wall of the screen-shaped roller,
the surface of the screen-shaped roller is provided with evenly distributed screen holes, the diameters of the screen holes are gradually changed from a feeding port to a discharging port of the screen-shaped roller,
the material raising plates are uniformly distributed in the sieve-shaped roller, the connecting ends of the material raising plates are welded with the sieve-shaped roller, and the material raising ends of the material raising plates are in a zigzag shape and extend towards the center of the sieve-shaped roller.
2. The efficient and energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil as claimed in claim 1, wherein one end of the connecting member is welded with the thermal desorption kiln body, and the other end is welded with the screen-shaped roller.
3. The efficient and energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil as claimed in claim 1, wherein the diameter of the screen-shaped roller is 1/2 of the diameter of the thermal desorption kiln body.
4. The efficient and energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil as claimed in claim 1, wherein the flame center of the thermal desorption burner is close to or positioned at the central shaft of the screen-shaped roller.
5. The high-efficiency energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil as claimed in claim 1, wherein the diameter of the sieve pores gradually decreases from the feeding port to the discharging port of the sieve-shaped roller.
6. The efficient energy-saving thermal desorption kiln body mechanism for repairing the organic contaminated soil as claimed in claim 1, wherein the length of the material raising plate is about 1/3-1/4 of the diameter of the screen-shaped roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011074308.2A CN112246853A (en) | 2020-10-10 | 2020-10-10 | Efficient energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011074308.2A CN112246853A (en) | 2020-10-10 | 2020-10-10 | Efficient energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil |
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| CN112246853A true CN112246853A (en) | 2021-01-22 |
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| CN202011074308.2A Pending CN112246853A (en) | 2020-10-10 | 2020-10-10 | Efficient energy-saving thermal desorption kiln body mechanism for repairing organic contaminated soil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600605A (en) * | 2021-07-30 | 2021-11-05 | 上海化工院环境工程有限公司 | Particle size grading conveying-gradient heating integrated thermal desorption device and use method thereof |
| CN113976607A (en) * | 2021-10-13 | 2022-01-28 | 煜环环境科技有限公司 | Integrated thermal desorption roller system and construction method thereof |
-
2020
- 2020-10-10 CN CN202011074308.2A patent/CN112246853A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600605A (en) * | 2021-07-30 | 2021-11-05 | 上海化工院环境工程有限公司 | Particle size grading conveying-gradient heating integrated thermal desorption device and use method thereof |
| CN113976607A (en) * | 2021-10-13 | 2022-01-28 | 煜环环境科技有限公司 | Integrated thermal desorption roller system and construction method thereof |
| CN113976607B (en) * | 2021-10-13 | 2022-11-15 | 煜环环境科技有限公司 | Integrated thermal desorption roller system and construction method thereof |
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