CN211462397U - Cyclone dust removal system for direct thermal desorption tail gas treatment - Google Patents
Cyclone dust removal system for direct thermal desorption tail gas treatment Download PDFInfo
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- CN211462397U CN211462397U CN201921828205.3U CN201921828205U CN211462397U CN 211462397 U CN211462397 U CN 211462397U CN 201921828205 U CN201921828205 U CN 201921828205U CN 211462397 U CN211462397 U CN 211462397U
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Abstract
The utility model provides a cyclone dust removal system for direct thermal desorption tail gas treatment, which comprises a thermal desorption device, a secondary flue gas treatment device and a cyclone dust collector; the flue gas outlet of the thermal desorption device is connected with a flue gas inlet pipeline, the flue gas inlet pipeline is divided into a plurality of branch pipelines which are respectively connected with the gas inlets of the cyclone dust collectors in a one-to-one correspondence manner, each branch pipeline is provided with a valve, and the gas outlets of the cyclone dust collectors are connected with a flue gas secondary treatment device through the flue gas outlet pipeline. This cyclone dust removal system adopts the parallelly connected mode of multistage cyclone that can independently close and open to handle the flue gas dust of thermal desorption, and adaptable different flue gas volume operating mode effectively reduces dust content in the flue gas, the due dust collection efficiency of performance cyclone, does not influence the operation of thermal desorption device promptly, also can burn or adsorb for the flue gas later step high temperature and create the advantage, realizes the effective processing of dystopy thermal desorption flue gas, has good environmental protection benefit, social and economic benefits.
Description
Technical Field
The utility model belongs to the technical field of pollute soil environment repair engineering, concretely relates to cyclone dust pelletizing system for direct thermal desorption tail gas is administered.
Background
With the development of industrialization and urbanization in China, the pollution of soil environment caused by human activities is more serious. At present, the exceeding standard rate of soil pollution in China reaches 16.1%, which is particularly shown in various aspects of industrial and mining industry, agriculture and the like, and is mainly focused on the periphery of the mining industry with higher modern economic development level and rapid development of the modern industry, and parts of cities and suburbs. For organic matter contaminated soil, common remediation technologies include thermal desorption technology, chemical oxidation technology, microbial technology, and the like.
The ex-situ thermal desorption technology has the advantages of high pollutant removal efficiency, short remediation period, wide pollutant adaptation range and the like for remediation of organic contaminated soil fields, and has been introduced into the recommended technology of the United states environmental protection agency as early as 1985. According to the American super fund project report (2017), ectopic thermal desorption technology is adopted in more than 69 super fund fields, and the proportion is 5.6%; according to 'review and prospect of restoration of industrial polluted sites in China' (2018), ectopic thermal desorption technology is adopted in 23 organic polluted sites, and the proportion is 16.0%.
In recent thirty years, continuous research on the basic theory and technology of thermal desorption is carried out in Europe, America, China and the like, and certain achievements are achieved in the aspects of basic theory and technology application. The ex-situ thermal desorption technology is developed from the treatment of organic pollutants with single components, low boiling points (less than 300 ℃) and no chlorine to the treatment of organic pollutants with high boiling points (more than 300 ℃), and finally to the treatment of organic pollutants with complex components, high boiling points and chlorine at present. The ex-situ thermal desorption technology mainly comprises two parts: firstly, thermal desorption treatment is carried out on soil, and pollutants in the soil are removed through heating; and secondly, the desorption tail gas is treated to remove pollutants in the thermal desorption tail gas, and the pollutants are discharged after reaching standards. At present, the tail gas treatment methods include an adsorption method, a high-temperature secondary combustion method, a plasma method and the like, however, the removal of organic matters is mainly concerned in all the tail gas treatment methods, and the removal of system dust is often ignored, so that the following problems often occur in the conventional tail gas treatment systems: (1) the system has serious ash deposition and difficult ash removal; (2) the ash removal capacity is insufficient, so that the flue gas atmosphere of the system is unstable, and the flue gas treatment effect is further influenced; (3) the system has serious dust deposition, which causes the frequency of instrumental maintenance of the equipment to be improved and influences the production efficiency.
Therefore, a dust removal system for direct thermal desorption tail gas treatment needs to be designed aiming at the characteristics of high flue gas dust depth, unstable flue gas amount and high flue gas temperature of an ex-situ thermal desorption system so as to adapt to different working conditions for repairing different types of soil.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming current dystopy thermal desorption system flue gas dust degree of depth is high, the flue gas volume is unstable, flue gas temperature is high, and traditional tail gas treatment system adaptability is poor, and the deashing ability is not enough, can't guarantee dust collection efficiency's problem.
Therefore, the utility model provides a cyclone dust removal system for direct thermal desorption tail gas treatment, which comprises a thermal desorption device, a flue gas secondary treatment device and a plurality of cyclone dust collectors; the flue gas outlet of the thermal desorption device is connected with a flue gas inlet pipeline, the flue gas inlet pipeline is divided into a plurality of branch pipelines which are respectively connected with the gas inlets of a plurality of cyclone dust collectors in a one-to-one correspondence manner, each branch pipeline is provided with a valve for controlling the amount of flue gas entering the cyclone dust collectors, and the gas outlets of the cyclone dust collectors are connected with the flue gas secondary treatment device through the flue gas outlet pipeline.
Furthermore, 8-10 cyclone dust collectors are arranged in multiple rows.
Further, the flue gas inlet pipeline, the branch pipeline and the flue gas outlet pipeline respectively comprise a vertical pipe section, an elbow pipe and a horizontal pipe section, and the maximum length of the horizontal pipe section is not more than 3 m.
Furthermore, a discharge port of an ash bucket at the lower part of each cyclone dust collector is connected with the thermal desorption device through a star-shaped ash discharge valve.
Furthermore, a star-shaped ash discharge valve and a valve which are connected with each cyclone dust collector are controlled in an interlocking manner.
Furthermore, an ash discharge conveyor for conveying ash is arranged between the discharge port of the ash hopper at the lower part of the cyclone dust collector and the thermal desorption device.
Furthermore, the ash discharge conveyors are multiple and are connected with the cyclone dust collectors in a one-to-one correspondence manner.
Further, the ash discharge conveyor is a screw conveyor or a belt conveyor.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a cyclone dust pelletizing system for direct thermal desorption tail gas is administered adopts the parallelly connected mode of multistage cyclone that can independently close and open to handle the flue gas dust of thermal desorption, adaptable different flue gas volume operating mode, can get rid of the flue gas that comes out from thermal desorption device, effectively reduce dust content in the flue gas, the due dust collection efficiency of performance cyclone, do not influence thermal desorption device's operation promptly, also can burn or adsorb for the one-step high temperature behind the flue gas and create the advantage, realize the effective processing of dystopy thermal desorption flue gas, good environmental protection benefit has, social and economic benefits.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of the cyclone dust removal system of the present invention.
Description of reference numerals: 1. a thermal desorption device; 2. a flue gas inlet duct; 3. a branch line; 4. a valve; 5. a flue gas outlet duct; 6. a secondary flue gas treatment device; 7. a cyclone dust collector; 8. a star-shaped ash discharge valve; 9. an ash discharge conveyor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, the present embodiment provides a cyclone dust removal system for direct thermal desorption tail gas treatment, which includes a thermal desorption device 1, a flue gas secondary treatment device 6, and a plurality of cyclone dust collectors 7; the flue gas outlet of thermal desorption device 1 connects flue gas inlet pipe 2, flue gas inlet pipe 2 divides a plurality of branch pipelines 3, is connected with the air inlet one-to-one of a plurality of cyclone 7 respectively, every be equipped with the valve 4 of control entering cyclone 7 medium smoke gas volume on branch pipeline 3, it is a plurality of the gas outlet of cyclone 7 all through flue gas outlet pipe 5 with flue gas secondary treatment device 6 is connected. In this embodiment, the contaminated soil is fed from the feed inlet of the thermal desorption device 1, and is discharged from the discharge outlet after being processed by the thermal desorption device 1, and the generated flue gas (the flue gas amount is 10000-15000 Nm)3H, the dust content is 3-10%) enters a cyclone dust collector 7 through a flue gas inlet pipeline 2 for dust removal, the cyclone dust collector 7 adopts a plurality of cyclone dust collector clusters which are connected in parallel, and each cyclone dust collector 7 can be independently closed and opened by controlling through a respective valve 4 so as to adapt to the working conditions of different flue gas quantities; the flue gas is dedusted by the cyclone dust collector 7The dust and the flue gas after dust removal are intercepted, the flue gas after dust removal enters a flue gas secondary treatment device 6 (such as a high-temperature incineration device or an adsorption device) for subsequent treatment through an outlet of a cyclone dust collector 7 through a flue gas outlet pipeline 5, and the intercepted dust is stored in an ash hopper at the lower part of the cyclone dust collector 7. The flue gas dust of thermal desorption is handled to the parallelly connected mode of multistage cyclone 7 that this embodiment adopted and can independently close and open, and adaptable different flue gas volume operating mode can get rid of the flue gas that comes out from thermal desorption device, effectively reduces dust content in the flue gas, the due dust collection efficiency of performance cyclone, does not influence thermal desorption device's operation promptly, also can burn or adsorb for the flue gas later step high temperature and create the advantage, realizes the effective processing of dystopy thermal desorption flue gas. In this embodiment, the thermal desorption device 1 and the flue gas secondary treatment device 6 are common devices in the existing ex-situ thermal desorption process, and the specific structure and the working process thereof are prior art and are not described herein again.
In a detailed implementation mode, the number of the cyclone dust collectors 7 is designed according to the properties of flue gas, the number of the cyclone dust collectors 7 is 8-10, and the cyclone dust collectors are arranged in multiple rows, for example, 8 cyclone dust collectors are arranged in 2 rows, and each row is provided with 4 cyclone dust collectors; 9 cyclone dust collectors are divided into 3 rows, and each row is provided with 3 cyclone dust collectors; 10 cyclone dust collectors are arranged in 2 rows of 5. Every cyclone 7 is the independent unit in design, and each cyclone 7 entry sets up valve 4, and valve 4 can freely be controlled and close and open to do not influence whole flue gas circulation, guarantee the interior flue gas velocity of cyclone 7, thereby can guarantee that dust collection efficiency reaches more than 75%. The flue gas inlet pipeline 2, the branch pipeline 3 and the flue gas outlet pipeline 5 which are used for communicating the thermal desorption device 1, the flue gas secondary treatment device 6 and the cyclone dust collector 7 respectively comprise a vertical pipe section, an elbow pipe and a horizontal pipe section, the vertical pipe section or the elbow pipe is used for replacing the horizontal pipe section as far as possible, the maximum length of the horizontal pipe section is not more than 3m, and dust is prevented from being deposited in the pipeline.
And for the dust stored in the dust hopper at the lower part of the cyclone dust collector 7, the discharge port of the dust hopper at the lower part of the cyclone dust collector 7 is connected with the thermal desorption device 1 through a star-shaped dust discharge valve 8, and the intercepted dust is conveyed back to the discharge position of the thermal desorption device 1 and conveyed together with the soil after thermal desorption and remediation to a specified position for stacking. Optimally, the star-shaped ash discharging valve 8 and the valve 4 connected with each cyclone dust collector 7 are controlled in a linkage manner, so that the star-shaped ash discharging valve 8 and the valve 4 can be synchronously started and stopped, and the rotating speed is adjusted to control the ash discharging speed and the ash discharging amount; the ash discharge speed is related to the number of the cyclone dust collectors 7, and is generally 30kg/h to 375 kg/h.
Further, an ash discharge conveyor 9 for conveying ash is arranged between an ash hopper discharge port at the lower part of the cyclone dust collector 7 and the thermal desorption device 1, specifically, the ash discharge conveyor 9 is a spiral conveyor or a belt conveyor, dust discharged from the lower part of the cyclone dust collector 7 is conveyed to the thermal desorption device 1 through the ash discharge conveyor 9, and the star-shaped ash discharge valve 8, the ash discharge conveyor 9 and pipelines connected with the ash discharge conveyor 9 are designed to be in a closed form, so that raised dust is reduced. The number of the ash discharge conveyors 9 corresponds to the arrangement form of the cyclone dust collectors 7, the ash discharge conveyors 9 are connected with the cyclone dust collectors 7 in a one-to-one correspondence mode, the running speed of the ash discharge conveyors 9 is adjustable, the conveying speed of the ash discharge conveyors 9 is 60 kg/h-750 kg/h, and the flue gas dedusting efficiency and the effective conveying of ash content are guaranteed by adjusting the running speeds of the star-shaped ash discharge valve 8 and the ash discharge conveyors 9.
To sum up, the utility model provides a this kind of cyclone dust pelletizing system for direct thermal desorption tail gas is administered, based on the characteristics such as heterotopic thermal desorption system flue gas dust content is high, the flue gas volume changes greatly, flue gas temperature height, through shortening flue gas pipeline horizontal straight tube segment length, the flue gas dust is handled to the parallelly connected mode of the multistage unit cyclone that adopts to independently close and open, then adopt speed adjustable star type dust discharging valve, form the dust pelletizing system of one set of different flue gas volumes that adapts to, fabulous adaptation heterotopic thermal desorption when handling polluted soil, the flue gas volume can be along with handling the different and the condition that changes of pollutant type in the target.
The above examples are merely illustrative of the present invention and do not limit the scope of the present invention, and all designs identical or similar to the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a cyclone dust pelletizing system for direct thermal desorption tail gas is administered which characterized in that: comprises a thermal desorption device, a secondary flue gas treatment device and a plurality of cyclone dust collectors; the flue gas outlet of the thermal desorption device is connected with a flue gas inlet pipeline, the flue gas inlet pipeline is divided into a plurality of branch pipelines which are respectively connected with the gas inlets of a plurality of cyclone dust collectors in a one-to-one correspondence manner, each branch pipeline is provided with a valve for controlling the amount of flue gas entering the cyclone dust collectors, and the gas outlets of the cyclone dust collectors are connected with the flue gas secondary treatment device through the flue gas outlet pipeline.
2. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 1, which is characterized in that: 8-10 cyclone are divided into a plurality of rows.
3. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 1, which is characterized in that: the flue gas inlet pipeline, the branch pipeline and the flue gas outlet pipeline respectively comprise a vertical pipe section, an elbow pipe and a horizontal pipe section, and the maximum length of the horizontal pipe section is not more than 3 m.
4. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 1, which is characterized in that: and a discharge port of an ash hopper at the lower part of each cyclone dust collector is connected with the thermal desorption device through a star-shaped ash discharge valve.
5. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 4, which is characterized in that: and the star-shaped ash discharge valve and the valve connected with each cyclone dust collector are controlled in a linkage manner.
6. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 4, which is characterized in that: an ash discharge conveyor for conveying ash is arranged between the discharge port of the ash hopper at the lower part of the cyclone dust collector and the thermal desorption device.
7. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 6, which is characterized in that: the ash discharge conveyors are in one-to-one correspondence connection with the cyclone dust collectors.
8. The cyclone dust removal system for direct thermal desorption tail gas treatment according to claim 6, which is characterized in that: the ash discharge conveyor is a screw conveyor or a belt conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921828205.3U CN211462397U (en) | 2019-10-29 | 2019-10-29 | Cyclone dust removal system for direct thermal desorption tail gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921828205.3U CN211462397U (en) | 2019-10-29 | 2019-10-29 | Cyclone dust removal system for direct thermal desorption tail gas treatment |
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| Publication Number | Publication Date |
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| CN211462397U true CN211462397U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921828205.3U Active CN211462397U (en) | 2019-10-29 | 2019-10-29 | Cyclone dust removal system for direct thermal desorption tail gas treatment |
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| CN (1) | CN211462397U (en) |
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