CN102921258B - Water mist dedusting device and dedusting method for brown coal drying upgrading - Google Patents

Water mist dedusting device and dedusting method for brown coal drying upgrading Download PDF

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Publication number
CN102921258B
CN102921258B CN201210428895.XA CN201210428895A CN102921258B CN 102921258 B CN102921258 B CN 102921258B CN 201210428895 A CN201210428895 A CN 201210428895A CN 102921258 B CN102921258 B CN 102921258B
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smoke
water
dedusting
dust
tower
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CN201210428895.XA
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CN102921258A (en
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李虎雄
李闻白
仁亮
程成
邱波
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Zhejiang Medium College
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ZHEJIANG MEDIUM COLLEGE
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Abstract

The invention discloses a water mist dedusting device and a dedusting method in a brown coal upgrading process. The dedusting device comprises a dedusting smoke pipeline, a smoke blocking plate, a water mist sprayer, a water mist dedusting tower, a smoke guide plate and the like. Hot smoke containing brown coal dust enters into the dedusting smoke pipeline under the action of a main air induced device, under the action of the smoke blocking plate, the hot smoke is gathered in a pipeline at the position of the water mist sprayer, when the hot smoke meets the water mist which is sprayed out, a part of dust in the smoke can be cleaned and removed, the residual smoke enters into the water mist dedusting tower through an outlet on the upper portion of the smoke blocking plate, rises in a spiral mode under the action of the smoke guide plate and sequentially penetrates through water mist layers formed by sprayed water of the water mist sprayer, and most dust in the smoke is cleaned and removed. The water mist dedusting device and the dedusting method for the brown coal drying upgrading have the advantages that the design is reasonable, the device is safe and reliable, the operation is stable during large-scale applications, the problems that by means of electric dedusting and bag dedusting methods, equipment maintenance costs are high and service lives of devices are short are effectively solved, the efficient and low-pollution comprehensive utilization of the brown coal can be effectively achieved, and the environment-friendly requirements of low carbon, energy conservation and emission reduction are met.

Description

A kind of Water-fog dusting apparatus of brown coal drying and upgrading and dust collection method
Technical field
The present invention relates to the dust collecting process in a kind of brown coal grading process, belong to Coal Clean, efficiency utilization field.
Background technology
Brown coal reserves account for about 15% of coal in China gross reserves, are the one of main coal resources, in China's power and chemical industry coal, play important effect.Brown coal belong to the coal that a kind of underground storage phase is short, degree of coalification is low, its moisture and content of ashes higher, easy-weathering in atmosphere, when directly using as direct fuel, efficiency of combustion is low, and solid dust, greenhouse gas emissions are high, seriously polluted.Brown coal are mainly distributed in the ground such as the Inner Mongol, Heilungkiang, Yunnan and Xinjiang, and due to economic development, the coal consumption in these areas is less compared with developed area, therefore needs brown coal to be transported to utilize place apart from distant.Due to the existence of brown coal higher moisture and high-volatile, cause the significant wastage of highway, rail transportation system transport power.Brown coal upgrading is referred to the moisture reduced by thermal physical process or thermochemical method in brown coal, improves product caloric value, reach be convenient to transport, efficiency of utilization high, pollute low object, clean, efficiency utilization for brown coal have great importance.
Because the fugitive constituent of brown coal is higher, causing it to produce in drying and upgrading process, a large amount of containing solid particle (lignite dust) and greenhouse gases, (main component is CO 2) heat smoke.If not treated, flue gas is directly discharged, will pollute air, heavy damage ecological environment.For now, domesticly electro dust removing method and cloth bag dust collection method is mainly adopted in brown coal upgrading dust removal field.When adopting electro dust removing method, total dust-collecting area of electric cleaner is directly proportional to smoke treatment amount.The dust content produced in brown coal grading process is large, wind speed is high, therefore usually requires that electric cleaner has larger specifications section, thus adds use cost and the floor space of equipment; In addition, the flue gas wind speed too high time of easily causing Charged to deposit on dust collector pole is too short, make it have little time deposition to be taken out of by wind-force, the too high secondary fly-up also easily producing dust of wind speed, particularly particularly serious when electrode carries out dust-collecting and vibrating operation simultaneously.When adopting cloth bag dust collection method, because the particle diameter of lignite dust is comparatively large, easily cause cloth bag block, and then cause cloth bag to wear and tear, bore a hole, even come off; In addition, the high-temperature flue gas of 200 DEG C ~ 300 DEG C easily makes cloth bag curing shrinkage, and acceleration cloth bag is aging.In addition, be no matter electric precipitation also or cloth bag dust collection method, all only effective to the solid particle in flue gas, and the greenhouse gas emission in flue gas can not be reduced.Therefore, execute-in-place simple, be convenient to safeguard, stable dedusting technology is the emphasis of brown coal drying and upgrading area research and exploitation always.
Summary of the invention
In order to overcome the deficiency of dedusting technology in existing brown coal grading process, the invention provides a kind of good dedusting effect, maintenance easy to use, the efficient mist dust arrester of stable performance and process.
Technical scheme of the present invention realizes as follows: the heat smoke in brown coal drying and upgrading process enters dedusting flue under the effect of main induced draft fan, this pipeline is connected with Water spray dust tower, junction is provided with smoke barrier, is provided with water spray projector in the pipeline in smoke barrier front.After flue gas meets smoke barrier stop, assemble in the pipeline at smoke barrier front (water spray projector place) under the effect of inertia force, after running into the water smoke of ejection, the part dust in flue gas is removed.Remaining flue gas continues to enter Water spray dust tower along the top outlet of smoke barrier.The inwall of gas wash tower is provided with smoke deflector according to spiral way, for heat smoke provides enough lift.The middle part of gas wash tower is provided with three groups of annular water spray projectors from bottom to top successively, and the water smoke of ejection forms three interception water smoke layers in gas wash tower inside.Heat smoke passes through these water smoke layers successively, and central most dust are removed by cleaning.The upper outlet of gas wash tower is that taper narrows gradually, is connected with chimney.When heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down feeding settling tank, realizes the recycling of part water resource.Remaining heat smoke enters air via chimney, and its main component is steam, thus reaches the object of Environmental-protecting dust-removing.Specifically, the feature of the method comprises following steps:
(1) heat smoke containing lignite dust enters dedusting flue under the effect of main induced draft fan;
(2) under the effect of smoke barrier, flue gas is assembled in the pipeline at smoke barrier front (water spray projector place), and after running into the water smoke of ejection, central part dust is removed by cleaning;
(3) remaining flue gas enters Water spray dust tower from the top outlet of smoke barrier, rises under the effect of smoke deflector along spiral way.At the middle part of Water spray dust tower, flue gas is successively through the interception water smoke layer that three groups of annular water spray projector water sprays are formed, and central most dust are removed by cleaning;
(4) upper outlet of Water spray dust tower is that taper narrows gradually, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down feeding settling tank;
(5) remaining heat smoke enters air via chimney, and its main component is steam.
The present invention compared with prior art, has the following advantages and high-lighting effect:
(1) smoke barrier is installed in the junction of cleaning shaft and Water spray dust tower, makes flue gas form gathering in the pipeline at water spray projector place, thus effectively improves the effect of first time spraying and dedusting;
(2) inwall of Water spray dust tower installs smoke deflector by spiral way, for heat smoke provides enough climbing powers, improves the efficiency of flue gas ash removal;
(3) three groups of annular water spray projectors are installed at the middle part of Water spray dust tower from bottom to top successively, and the water smoke of ejection forms three interception water smoke layers in tower, can effectively clean the most dust that remove in flue gas after contacting with the heat smoke risen;
(4) upper outlet of gas wash tower is that taper narrows gradually, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down feeding settling tank, achieves the recycling of part water resource.
(5) due to CO 2water soluble, through to four times of heat smoke sprays, can CO in partial removal flue gas 2, thus decrease greenhouse gas emission.
Therefore, the present invention can be used for the flue gas ash removal in extensive brown coal drying and upgrading process, effectively can realize efficient, the low stain comprehensive utilization of coal resources, and reach the environmental requirement of low-carbon (LC), energy-saving and emission-reduction.
Accompanying drawing explanation
The Water-fog dusting apparatus structural representation of the brown coal drying and upgrading that Fig. 1 provides for the embodiment of the present invention;
The sketch of the annular water spray projector that Fig. 2 embodiment of the present invention provides;
The realization flow figure of the water mist dust-removing process of the brown coal drying and upgrading that Fig. 3 embodiment of the present invention provides.
In figure: 1, brown coal dedusting flue; 2, smoke barrier 3, water spray projector 4, Water spray dust tower; 5, smoke deflector; 6, annular water spray projector; 6-1, interior survey nozzle 6-2, outer nozzle; 7, settling tank 8, chimney.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1,2 shows the structure of the Water-fog dusting apparatus of the brown coal drying and upgrading that the embodiment of the present invention provides.For convenience of explanation, illustrate only part related to the present invention.
Lower wall arranges water spray projector 3 to brown coal dedusting flue 1; Brown coal dedusting flue 1 installs smoke barrier 2 with the junction of Water spray dust tower 4; The inwall of Water spray dust tower 4 installs smoke deflector 5 by spiral way; Three groups of annular water spray projectors 6 are installed at the middle part of Water spray dust tower 4 from bottom to top successively; Annular water spray projector 6 is made up of interior survey nozzle 6-1 and outer nozzle 6-2; Sedimentation basin 7 is arranged in the device rightmost side, arranges chimney 8 above.
Fig. 3 shows the water mist dust-removing process of the brown coal drying and upgrading that the invention process case provides, and the method comprises:
In step S301, first the heat smoke containing lignite dust enters dedusting flue 1 under the effect of main induced draft fan, under the effect of smoke barrier, flue gas is assembled in the pipeline at water spray projector 3 place, smoke barrier 2 front, after running into the water smoke of ejection, central part dust is removed by cleaning;
In step s 302, remaining flue gas enters Water spray dust tower 4 from the top outlet of smoke barrier 2, rises under the effect of smoke deflector 5 along spiral way.At the middle part of Water spray dust tower 4, flue gas is successively through the interception water smoke layer that three groups of annular water spray projectors 6 water sprays are formed, and central most dust are removed by cleaning;
In step S303, the upper outlet of Water spray dust tower 4 is that taper narrows gradually, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down and sends into settling tank 7, realizes the recycling of part water resource;
In step s 304, remaining heat smoke enters air via chimney 8, and its main component is steam.
Heat smoke in brown coal drying and upgrading process enters dedusting flue 1 under the effect of main induced draft fan, this pipeline is connected with Water spray dust tower 4, junction is provided with smoke barrier 2, water spray projector 3 is provided with in the pipeline in its front, after flue gas meets smoke barrier 2 stop, assemble in the pipeline at water spray projector 3 place under the effect of inertia force, after running into the water smoke of ejection, the part dust in flue gas is removed; Remaining flue gas continues to enter Water spray dust tower 4 along the top outlet of smoke barrier 2, its inwall is provided with smoke deflector 5 according to spiral way, for heat smoke provides enough lift, the middle part of gas wash tower 4 is provided with three groups of annular water spray projectors 6 from bottom to top successively, the water smoke of ejection forms three water smoke interception faces in gas wash tower 4 inside, heat smoke passes through these water smoke layers successively, and central most dust are removed by cleaning; The upper outlet of gas wash tower 4 is that taper narrows gradually, is connected with chimney 8, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down and sends into settling tank 7, realizes the recycling of part water resource; Remaining heat smoke enters air via chimney 8, and its main component is steam.
The Water-fog dusting apparatus of the brown coal drying and upgrading that the embodiment of the present invention provides and process, heat smoke in brown coal drying and upgrading process enters dedusting flue 1 under the effect of main induced draft fan, this pipeline is connected with Water spray dust tower 4, junction is provided with smoke barrier 2, be provided with water spray projector 3 in the pipeline in its front, flue gas is assembled after meeting smoke barrier 2 stop under the effect of inertia force in the pipeline at water spray projector 3 place, after running into the water smoke of ejection, the part dust in flue gas is removed; Remaining flue gas continues to enter Water spray dust tower 4 along the top outlet of smoke barrier 2, its inwall is provided with smoke deflector 5 according to spiral way, for heat smoke provides enough lift, the middle part of gas wash tower 4 is provided with three groups of annular water spray projectors 6 from bottom to top successively, the water smoke of ejection forms three water smoke interception faces in gas wash tower 4 inside, heat smoke passes through these water smoke layers successively, and central most dust are removed by cleaning; The upper outlet of gas wash tower 4 is that taper narrows gradually, is connected with chimney 8, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down and sends into settling tank 7, realizes the recycling of part water resource; Remaining heat smoke enters air via chimney 8, and its main component is steam.
Smoke barrier is installed in the junction of cleaning shaft and Water spray dust tower, makes flue gas form gathering in the pipeline at water spray projector place, thus effectively improves the effect of first time spraying and dedusting; The inwall of Water spray dust tower installs smoke deflector by spiral way, for heat smoke provides enough climbing powers, improves the efficiency of flue gas ash removal; Three groups of annular water spray projectors are installed at the middle part of Water spray dust tower from bottom to top successively, and the water smoke of ejection forms three interception water smoke layers in tower, can effectively clean the most dust that remove in flue gas after contacting with the heat smoke risen; The upper outlet of gas wash tower is that taper narrows gradually, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down feeding settling tank, achieves the recycling of part water resource; Due to CO 2water soluble, through to four times of heat smoke sprays, can CO in partial removal flue gas 2, thus decrease greenhouse gas emission.
Therefore, the present invention can be used for the flue gas ash removal in extensive brown coal drying and upgrading process, effectively can realize efficient, the low stain comprehensive utilization of coal resources, and reach the environmental requirement of low-carbon (LC), energy-saving and emission-reduction.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. the Water-fog dusting apparatus of a brown coal drying and upgrading, comprise dedusting flue, smoke barrier, Water spray dust tower, smoke deflector, annular water spray projector, settling tank and chimney, it is characterized in that, described Water-fog dusting apparatus also comprises and is arranged in flue gas ash removal pipeline and Water spray dust tower, guarantee fully contacting of water smoke and heat smoke in dust removal process, realize four groups of water spray projectors that the cleaning of lignite dust in flue gas removes;
Described smoke barrier is arranged on the junction of cleaning shaft and Water spray dust tower;
Three groups of annular water spray projectors are arranged on the middle part of Water spray dust tower from bottom to top successively, make the water smoke of ejection in tower, form three interception water smoke layers;
The inwall of described Water spray dust tower installs smoke deflector by spiral way;
The top outlet of described Water spray dust tower narrows gradually in taper, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down feeding settling tank.
2. a water mist dust-removing method for brown coal drying and upgrading, it is characterized in that, the method comprises following steps:
1) heat smoke containing lignite dust enters dedusting flue under the effect of main induced draft fan;
2) under the effect of smoke barrier, flue gas is assembled in the pipeline at water spray projector place, and after running into the water smoke of ejection, central part dust is removed by cleaning;
3) remaining flue gas enters Water spray dust tower from the top outlet of smoke barrier, rise along spiral way under the effect of smoke deflector, successively through the interception water smoke layer that three groups of annular water spray projector water sprays are formed, central most dust are removed by cleaning;
4) upper outlet of Water spray dust tower is that taper narrows gradually, and when heat smoke runs into the tower wall narrowed, part steam is wherein condensed into water droplet, and Yan Tabi flows down feeding settling tank;
5) remaining heat smoke enters air via chimney, and its main component is steam;
Entering the heat smoke temperature coming from brown coal drying and upgrading process in dedusting flue is 100 DEG C ~ 200 DEG C.
CN201210428895.XA 2012-10-25 2012-10-25 Water mist dedusting device and dedusting method for brown coal drying upgrading Expired - Fee Related CN102921258B (en)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106237760A (en) * 2016-10-12 2016-12-21 无锡派乐科技有限公司 A kind of workshop dedusting mixing arrangement
CN106310844A (en) * 2016-10-12 2017-01-11 无锡派乐科技有限公司 Dust removal mixing device based on dust monitoring
CN106422606A (en) * 2016-10-12 2017-02-22 无锡派乐科技有限公司 Water mixing type mixed dust removal device
CN106237759A (en) * 2016-10-12 2016-12-21 无锡派乐科技有限公司 A kind of dust monitor-type dedusting hybrid system
CN106422605A (en) * 2016-10-12 2017-02-22 无锡派乐科技有限公司 Dust monitoring type workshop top dust removal mixing system
CN108826335B (en) * 2018-07-10 2019-10-25 连云港海蓝研磨材料有限公司 A kind of chimney dust collecting device
CN109126352B (en) * 2018-09-27 2020-09-15 王小平 Self-cleaning bag type dust collector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2473472Y (en) * 2001-01-03 2002-01-23 黄文宣 Industrial smoke exhaust and dust removing treatment device
CN2532907Y (en) * 2002-02-09 2003-01-29 刘卫东 Cyclone adsorbing wet dust collector
CN2559400Y (en) * 2002-07-09 2003-07-09 孟凡斌 Charged water curtain dust removing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2473472Y (en) * 2001-01-03 2002-01-23 黄文宣 Industrial smoke exhaust and dust removing treatment device
CN2532907Y (en) * 2002-02-09 2003-01-29 刘卫东 Cyclone adsorbing wet dust collector
CN2559400Y (en) * 2002-07-09 2003-07-09 孟凡斌 Charged water curtain dust removing device

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