CN104289066A - High-temperature dust removal device for thermal desorption exhaust - Google Patents
High-temperature dust removal device for thermal desorption exhaust Download PDFInfo
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- CN104289066A CN104289066A CN201410542700.3A CN201410542700A CN104289066A CN 104289066 A CN104289066 A CN 104289066A CN 201410542700 A CN201410542700 A CN 201410542700A CN 104289066 A CN104289066 A CN 104289066A
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Abstract
The invention discloses a high-temperature dust removal device for thermal desorption exhaust. The device comprises a high-temperature cyclone dust collector, a high-temperature bag type pulse dust collector and a high-temperature resistant gas pipeline, wherein high-temperature desorption exhaust is subjected to primary dust removal through the high-temperature cyclone dust collector, and enters the high-temperature bag type pulse dust collector through the high-temperature resistant gas pipeline to be subjected to secondary dust removal. The dust removal rate of the thermal desorption exhaust subjected to two stages of high-temperature dust removal can reach over 99%, and the device can be used for removing solid granules with the size of greater than 0.2 micron in the desorption exhaust.
Description
Technical field
The present invention relates to a kind of thermal desorption tail gas high-temperature dust removing device.
Background technology
Contaminated soil thermal desorption treatment technology adopts direct or indirect heat exchange method, contaminated soil is heated to sufficiently high temperature and after keeping a period of time, pollutant volatilized and the process separated from contaminated soil.The desorption tail gas that thermal desorption processing procedure produces contains solid particulate matter, gaseous contaminant and water etc., has that temperature is high, water content is high and dustiness high, need carry out process reach relevant emission standards to it.After the processing method of desorption tail gas generally adopts wet dust removal or common bag-type dusting, then cool.There is following problem in above-mentioned processing method: desorption tails dedusting weak effect; In condensed water, pollutant levels are high, dustiness is high; Tails dedusting and follow-up tail gas cooling system easily block, and the difficulty of subsequent wastewater treatment and processing load increase.
At present, the patent of the aspects such as existing contaminated soil thermal desorption processing method, system, but for the process of elevated temperature desorption tail gas, not yet proposing can solution to the problems described above.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, a kind of thermal desorption tail gas high-temperature dust removing device is provided.
The object of the invention is to be achieved through the following technical solutions, a kind of thermal desorption tail gas high-temperature dust removing device, this device comprises high-temperature cyclone dust extractor, high-temperature bag pulse dust collector, high-temperature-resistant gas pipeline, and described high-temperature cyclone dust extractor comprises the first flue-dust retainer, the first unloading valve, the first ash-falling chamber, the first support, the first separation chamber and exhaust core pipe; First support installing is in the first both sides, separation chamber, first separation chamber, the first ash-falling chamber, the first unloading valve, the first flue-dust retainer connect from top to bottom successively, exhaust core pipe is arranged on the top of the first separation chamber, exhaust core pipe top has the first gas outlet, the top of first separation chamber's sidewall has the first air inlet, and the first air inlet place is connected with the air inlet pipe that the tangential direction along first separation chamber's sidewall is arranged; Described high-temperature bag pulse dust collector comprises the second flue-dust retainer, the second unloading valve, the second ash-falling chamber, the second support, the second separation chamber, compressed air bag, impulse electromagnetic valve, compressed air hose, high temperature resistant filter and dividing plate; Second support installing is in the second both sides, separation chamber, second flue-dust retainer, the second unloading valve, the second ash-falling chamber, the second separation chamber connect from top to bottom successively, dividing plate is arranged on the second top, separation chamber, second separation chamber is divided into upper and lower two parts, top is divided into air-purifying chamber, and the side of air-purifying chamber has the second gas outlet; Dividing plate has multiple passage, be provided with Venturi tube below passage, Venturi tube lower end connects high temperature resistant filter; Airtight connection between passage, Venturi tube, high temperature resistant filter; Compressed air bag is arranged on outside the second separation chamber, and the compressed air side of wrapping is provided with multiple impulse electromagnetic valve, and compressed air hose is through the barrel of the second separation chamber, and one end connects Venturi tube upper port, and the other end connects impulse electromagnetic valve; The downside of the second separation chamber has the second air inlet; Described high-temperature-resistant gas pipeline one end connects the first gas outlet, and the other end connects the second air inlet.
Further, described high-temperature cyclone dust extractor, high-temperature bag pulse dust collector, high-temperature-resistant gas pipeline are coated by insulation material.
Further, described insulation material is selected from rock wool, aluminosilicate fiber cotton, and thickness is 50 ~ 100 mm.
Further, described high temperature resistant filter is made by the mesh grid of 316L stainless steel, and aperture is 0.2 ~ 0.4 μm.
Further, described high temperature resistant filter also can be pore size filter the be refractory ceramics screen pipe of 1.0 ~ 2.0 μm.
Further, described first air inlet is provided with gas-monitoring unit, described gas-monitoring unit comprises baroceptor, Flow speed measurer, temperature sensor, power supply and display unit, described power supply is connected with display unit with baroceptor, Flow speed measurer, temperature sensor, and baroceptor, Flow speed measurer, temperature sensor are connected with display unit respectively.
Compared to prior art, the invention has the advantages that: 1. exhaust temperature in deduster can be avoided to reduce and make water vapor condensation block deduster and gas pipeline; 2. effectively avoid the blocking effect that in follow-up tail gas cooling unit, cooling device and gas pipeline occur because of control of dust; 3. can reduce suspended solid (SS) content in the condensed water of tail gas coolant flat, reduce condensed water intractability; 4., in the tail gas cooling procedure that dedusting is follow-up, can avoid again being adsorbed by the solid particle tail gas from contaminated soil desorption gaseous contaminant out.
Accompanying drawing explanation
Fig. 1 is that equipment is always schemed;
Fig. 2 is high-temperature cyclone dust extractor structure chart;
Fig. 3 is high-temperature bag pulse dust collector structure chart;
Fig. 4 is the sectional view of high-temperature bag pulse dust collector;
Fig. 5 is the airflow direction schematic diagram of elevated temperature desorption tail gas when entering high-temperature cyclone dust extractor;
Fig. 6 is the annexation schematic diagram of compressed air hose.
Wherein: 1-high-temperature cyclone dust extractor, 2-high-temperature-resistant gas pipeline, 3-high-temperature bag pulse dust collector, 4-first flue-dust retainer, 5-first unloading valve, 6-first ash-falling chamber, 7-first support, 8-first separation chamber, 9-exhaust core pipe, 10-first air inlet, 11-first gas outlet, 12-second flue-dust retainer, 13-second unloading valve, 14-second ash-falling chamber, 15-second support, 16-second separation chamber, 17-second air inlet, 18-compressed air bag, 19-impulse electromagnetic valve, 20-compressed air hose, 21-second gas outlet, 22-air-purifying chamber, 23-is high temperature resistant filter, 24-dividing plate, 25-Venturi tube.
Detailed description of the invention
As shown in Figure 1, a kind of thermal desorption tail gas high-temperature dust removing device, this device comprises high-temperature cyclone dust extractor 1, high-temperature bag pulse dust collector 3, high-temperature-resistant gas pipeline 2.
As shown in Figure 2, described high-temperature cyclone dust extractor 1 comprises the first support 7, first separation chamber 8 of flue-dust retainer 4, first unloading valve 5, first ash-falling chamber 6, first and exhaust core pipe 9; First support 7 is arranged on the first both sides, separation chamber 8, first ash-falling chamber of separation chamber 8, first 6, first unloading valve 5, first flue-dust retainer 4 connects from top to bottom successively, exhaust core pipe 9 is arranged on the top of the first separation chamber 8, exhaust core pipe 9 top has the first gas outlet 11, the top of the first separation chamber 8 sidewall has the first air inlet 10, first air inlet 10 place and is connected with the air inlet pipe (as Fig. 5) of arranging along the first separation chamber 8 sidewall tangential direction.
As shown in Figures 3 and 4, described high-temperature bag pulse dust collector 3 comprises the second support 15, second separation chamber 16 of flue-dust retainer 12, second unloading valve 13, second ash-falling chamber 14, second, compressed air bag 18, impulse electromagnetic valve 19, compressed air hose 20, high temperature resistant filter 23 and dividing plate 24; Second support 15 is arranged on the second both sides, separation chamber 16, second separation chamber 16 of flue-dust retainer 12, second unloading valve 13, second ash-falling chamber 14, second connects from top to bottom successively, dividing plate 24 is arranged on the second top, separation chamber 16, second separation chamber 16 is divided into upper and lower two parts, top is divided into air-purifying chamber 22, and the side of air-purifying chamber 22 has the second gas outlet 21; Dividing plate 24 has multiple passage, is provided with Venturi tube 25 below passage, Venturi tube 25 lower end connects high temperature resistant filter 23; Airtight connection between passage, Venturi tube 25, high temperature resistant filter 23; Compressed air bag 18 is arranged on outside the second separation chamber 16, is provided with the impulse electromagnetic valve 19 of high temperature resistant filter 23 same number, each impulse electromagnetic valve 19 is all provided with compressed air hose 20 above compressed air bag 18; Compressed air hose 20 is through the barrel of the second separation chamber 16, and one end connects the upper port of Venturi tube 25, and the other end connects the upper end (as shown in Figure 6) of impulse electromagnetic valve 19; The downside of the second separation chamber 16 has the second air inlet 17; Described high-temperature-resistant gas pipeline 2 one end connects the first gas outlet 11, and the other end connects the second air inlet 17.
Described high-temperature cyclone dust extractor 1, high-temperature bag pulse dust collector 3, high-temperature-resistant gas pipeline 2 are coated by insulation material.With prevent heat in tail gas excessive and protection operating personnel personal safety.
Described insulation material is selected from rock wool, aluminosilicate fiber cotton, and thickness is 50 ~ 100 mm.
Described high temperature resistant filter 23 is made by the mesh grid of 316L stainless steel, and aperture is 0.2 ~ 0.4 μm.Also can be pore size filter the be refractory ceramics screen pipe of 1.0 ~ 2.0 μm, the dust that elimination diameter is greater than 0.2 μm.
Described first air inlet 10 is provided with gas-monitoring unit, described gas-monitoring unit comprises baroceptor, Flow speed measurer, temperature sensor, power supply and display unit, described power supply is connected with display unit with baroceptor, Flow speed measurer, temperature sensor, and baroceptor, Flow speed measurer, temperature sensor are connected with display unit respectively.Detect and enter the parameters such as the flow velocity of the elevated temperature desorption tail gas of the first air inlet 10.
The course of work of thermal desorption tail gas high-temperature dust removing device is as follows:
(1) the first air inlet 10 is connected with thermal desorption device by pipeline;
(2) the elevated temperature desorption tail gas that produces in thermal desorption device of contaminated soil enters high-temperature cyclone dust extractor 1 by the first air inlet 10 along the tangential direction (as shown in Figure 4) of the first separation chamber 8 sidewall, and staff to monitor elevated temperature desorption tail gas according to the air pressure that display unit shows, flow velocity, temperature and regulates; Elevated temperature desorption tail gas spirally from top to bottom moves to the first unloading valve 5 bottom conical first ash-falling chamber 6, from the first ash-falling chamber of separation chamber 8 to the first 6, form the outward turning dust-contained airflow declined, the grit that density is far longer than gas by the centrifugal force produced in strong rotary course gets rid of the wall to the first separation chamber 8 and the first ash-falling chamber 6, grit is once contact with wall, just lose inertia force, and drop to the first unloading valve 5 along wall by the momentum of entrance velocity with the gravity of self thus enter the first flue-dust retainer 4.
Rotate the air-flow that declines bottom arrival first ash-falling chamber 6 after, along high-temperature cyclone dust extractor 1 axis part then upwards, form the interior rotational gas flow risen, and to be discharged by the first gas outlet 11.
Desorption tail gas through the pre-dedusting of high-temperature cyclone dust extractor 1 enters high-temperature bag pulse dust collector 3 by high-temperature-resistant gas pipeline 2 by the second air inlet 17, desorption tail gas is after high temperature filtration device 23 filters, by Venturi tube 25 and passage, until the air-purifying chamber 22 on dividing plate 24 top; After high temperature filtration device 23 filters, the solid particle being greater than 0.2 μm is blocked in outside high temperature resistant filter bag, and the solid particle that residue small part is less than 0.2 μm enters air-purifying chamber 22 with the tail gas after filtering, then flows out high-temperature bag pulse dust collector 3.Solid particle is too much enriched in filter bag surface and gas filtration resistance can be caused greatly to increase, affect the normal operation of deduster, need regularly to carry out deashing to it, specifically by timing and trigger impulse magnetic valve 19 in order, make the compressed air in compressed air bag 18 by compressed air piping 20 and Venturi tube 25 is instantaneous is ejected in corresponding high temperature resistant filter bag 23, high temperature resistant filter bag 23 sharply expands under air-flow moment acting in opposition, make long-pending be attached to the dust releasing of filter bag outer surface and fall to flue-dust retainer, the long-pending dust be attached on filter bag is had pulse jet periodically to remove, ensure that dust pelletizing system is normally run.
(3) tail gas after purification enters air-purifying chamber 22, then gets rid of from the second gas outlet 21, completes the purification of elevated temperature desorption tail gas.Thermal desorption tail gas dust clearance through secondary high-temperature dust removal can reach more than 99%, can remove the soil particle being greater than 0.2 μm.
Claims (6)
1. a thermal desorption tail gas high-temperature dust removing device, it is characterized in that, this device comprises high-temperature cyclone dust extractor (1), high-temperature bag pulse dust collector (3), high-temperature-resistant gas pipeline (2), it is characterized in that: described high-temperature cyclone dust extractor (1) comprises the first flue-dust retainer (4), the first unloading valve (5), the first ash-falling chamber (6), the first support (7), the first separation chamber (8) and exhaust core pipe (9); First support (7) is arranged on the first separation chamber (8) both sides, first separation chamber (8), the first ash-falling chamber (6), the first unloading valve (5), the first flue-dust retainer (4) connect from top to bottom successively, exhaust core pipe (9) is arranged on the top of the first separation chamber (8), exhaust core pipe (9) top has the first gas outlet (11), the top of the first separation chamber (8) sidewall has the first air inlet (10), and the first air inlet (10) place is connected with the air inlet pipe that the tangential direction along the first separation chamber (8) sidewall is arranged; Described high-temperature bag pulse dust collector (3) comprises the second flue-dust retainer (12), the second unloading valve (13), the second ash-falling chamber (14), the second support (15), the second separation chamber (16), compressed air bag (18), impulse electromagnetic valve (19), compressed air hose (20), high temperature resistant filter (23) and dividing plate (24); Second support (15) is arranged on the second separation chamber (16) both sides, second flue-dust retainer (12), the second unloading valve (13), the second ash-falling chamber (14), the second separation chamber (16) connect from top to bottom successively, dividing plate (24) is arranged on the second separation chamber (16) top, second separation chamber (16) are divided into upper and lower two parts, top is divided into air-purifying chamber (22), and the side of air-purifying chamber (22) has the second gas outlet (21); (24) have multiple passage with dividing plate, are provided with Venturi tube (25) below passage, and Venturi tube (25) lower end connects high temperature resistant filter (23); Airtight connection between passage, Venturi tube (25), high temperature resistant filter (23); Compressed air bag (18) is arranged on outside, the second separation chamber (16), and compressed air bag (18) top is provided with the impulse electromagnetic valve (19) identical with the number of high temperature resistant filter (23); Compressed air hose (20) is through the barrel of the second separation chamber (16), and one end connects Venturi tube (25) upper port, and the other end connects impulse electromagnetic valve (19) upper port; The downside of the second separation chamber (16) has the second air inlet (17); Described high-temperature-resistant gas pipeline (2) one end connects the first gas outlet (11), and the other end connects the second air inlet (17).
2. a kind of thermal desorption tail gas high-temperature dust removing device according to claim 1, is characterized in that: described high-temperature cyclone dust extractor (1), high-temperature bag pulse dust collector (3), high-temperature-resistant gas pipeline (2) are coated by insulation material.
3., according to a kind of thermal desorption tail gas high-temperature dust removing device shown in claim 2, it is characterized in that: described insulation material is selected from rock wool, aluminosilicate fiber cotton, thickness is 50 ~ 100 mm.
4. a kind of thermal desorption tail gas high-temperature dust removing device according to claim 1, is characterized in that: described high temperature resistant filter (23) is made by the mesh grid of 316L stainless steel, and aperture is 0.2 ~ 0.4 μm.
5. a kind of thermal desorption tail gas high-temperature dust removing device according to claim 1, is characterized in that: described high temperature resistant filter (23) for pore size filter be the refractory ceramics screen pipe of 1.0 ~ 2.0 μm.
6. the high-temperature dust removing device of a kind of thermal desorption tail gas according to claim 1, it is characterized in that, described first air inlet (10) is provided with gas-monitoring unit, described gas-monitoring unit comprises baroceptor, Flow speed measurer, temperature sensor, power supply and display unit, described power supply is connected with display unit with baroceptor, Flow speed measurer, temperature sensor, and baroceptor, Flow speed measurer, temperature sensor are connected with display unit respectively.
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| CN201410542700.3A CN104289066B (en) | 2014-10-14 | 2014-10-14 | Thermal desorption tail gas high-temperature dust removing device |
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| CN201410542700.3A CN104289066B (en) | 2014-10-14 | 2014-10-14 | Thermal desorption tail gas high-temperature dust removing device |
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| CN104289066B CN104289066B (en) | 2016-06-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785386A (en) * | 2015-04-22 | 2015-07-22 | 山西山原鼓风机有限责任公司 | Dedicated separator for cleaning scattered coal dust on railroad bed |
| CN107335296A (en) * | 2017-08-23 | 2017-11-10 | 江苏省宜兴非金属化工机械厂有限公司 | Novel dust collection device and its method on aluminium oxide extraction process from coal ash |
| CN110030841A (en) * | 2019-04-24 | 2019-07-19 | 广州华鑫工程技术有限公司 | Dedusting of EAF equipment and dust removal method |
| CN110124397A (en) * | 2019-05-27 | 2019-08-16 | 杨晓艺 | A kind of biomass boiler cleaning dust remover |
| CN110975428A (en) * | 2019-11-26 | 2020-04-10 | 山东浦创流体技术有限公司 | High-temperature flue gas filtering system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104785386A (en) * | 2015-04-22 | 2015-07-22 | 山西山原鼓风机有限责任公司 | Dedicated separator for cleaning scattered coal dust on railroad bed |
| CN107335296A (en) * | 2017-08-23 | 2017-11-10 | 江苏省宜兴非金属化工机械厂有限公司 | Novel dust collection device and its method on aluminium oxide extraction process from coal ash |
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| CN110124397A (en) * | 2019-05-27 | 2019-08-16 | 杨晓艺 | A kind of biomass boiler cleaning dust remover |
| CN110975428A (en) * | 2019-11-26 | 2020-04-10 | 山东浦创流体技术有限公司 | High-temperature flue gas filtering system |
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| CN104289066B (en) | 2016-06-29 |
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