CN203853168U - Device for removing PM2.5 from wet flue gas - Google Patents

Device for removing PM2.5 from wet flue gas Download PDF

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Publication number
CN203853168U
CN203853168U CN201420141075.7U CN201420141075U CN203853168U CN 203853168 U CN203853168 U CN 203853168U CN 201420141075 U CN201420141075 U CN 201420141075U CN 203853168 U CN203853168 U CN 203853168U
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CN
China
Prior art keywords
flue gas
dust
district
removes
wet flue
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Expired - Fee Related
Application number
CN201420141075.7U
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Chinese (zh)
Inventor
张磊
艾华
李彦涛
边靖
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China National Heavy Machinery Research Institute Co Ltd
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China National Heavy Machinery Research Institute Co Ltd
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Priority to CN201420141075.7U priority Critical patent/CN203853168U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model belongs to the field of environmental protection equipment, and particularly relates to a device for removing PM2.5 from wet flue gas. The device comprises a dust charged area, a dust collecting area and a secondary charged area, wherein the dust charged area is formed at the flue gas inlet end on the upper part of a body of the device, the dust collecting area is formed in the middle of the body of the device, the secondary charged area is formed on the upper part of the dust collecting area, the secondary charged area is as follows: vertically formed in a pre-charged area is formed by lengthening a vertically-arranged discharge electrode in the dust collecting area, so as to perform charge dust, and the increased length is 300mm to 2000mm. By using the device, fine particles of the PM2.5 (dust, SO3 acid mist, water drops and heavy metals) and the like can be removed from the wet flue gas, the content of dust of the discharged flue gas is less than or equal to 20mg/m<3>, and the removing efficiency of the PM2.5 is larger than or equal to 90%.

Description

A kind of device that removes PM2.5 in wet flue gas
Technical field
The utility model belongs to environmental protection equipment technical field, is specifically related to a kind of device that removes PM2.5 in wet flue gas.
Background technology
The fine particle of coal-burning boiler and industrial furnace smoke discharge is the main fixed discharge source of PM2.5 in atmosphere, and the energy resource structure of China also determines that China still can be using coal as main energy sources after long-term.Although most of coal-burning boiler and Industrial Stoves have adopted dust removing desulphurization plant, but the removal efficiency to fine particles such as PM2.5 in flue gas is low, and existing most of coal-burning boiler and Industrial Stoves are taked traditional dedusting and wet desulfurizing process, though in the flue gas after wet desulphurization, big dust particle concentration reduces, but in flue gas, the total amount of the fine particle such as fine dust, acid mist often reaches 100mg/m 3left and right, fine particulates discharge severe overweight, the fine particle total amount of discharge is huge, and these fine particles are suspended in for a long time in air and are difficult to sedimentation, and health and atmospheric environment are caused to serious harm.
Along with people to living environment quality require raising and environmental protection standard require more and more stricter, fine particle in wet-method desulfurized fume will become the emphasis of environment protection emission control, and existing particle control technology and equipment are very little to the ability that removes of the fine particles such as PM2.5, it is extremely urgent that exploitation efficiently removes the technology and equipment of fine particle.
Application number is that 201110248535.7 Chinese invention patent discloses " a kind of device and method that removes PM2.5 in flue gas ", its micropolar adopting is apart from rotating vane type electric cleaner, but because its die opening is only 15 ~ 30mm, electric field working voltage is very low, cause dust removing effects not good, can not solve the technical problem that removes flue gas PM2.5 at all.As can be seen here, prior art awaits further improving and developing.
Summary of the invention
The purpose of this utility model is to provide a kind of device that removes PM2.5 in wet flue gas, can effectively solve the problem of PM2.5 discharge severe overweight in existing wet flue gas.
The utility model is achieved through the following technical solutions: a kind of device that removes PM2.5 in wet flue gas, gas approach end is arranged on the left upper end of device, smoke outlet is located at the lower right corner of device, comprise the dust collection section that is located at the dust charging area of device top flue gas entrance point and is located at device middle part, also comprise the pre-charging area of secondary that is arranged on top, dust collection section; The pre-charging area of described secondary is to form pre-charging area to carry out dust charged by lengthening the discharge electrode being vertically arranged in dust collection section, and the length of lengthening is 300mm ~ 2000mm.
Described dust collection section also comprises the dust collecting electrode being vertically arranged in dust collection section and the also high voltage source of ground connection that is connected with device case, and described high voltage source is discharge electrode power supply.
Also comprise the coalescence reunion district that is arranged on device upper right quarter, between described coalescence reunion district and dust charging area, be provided with flue gas turbulent flow device.
Also comprise the airflow uniform distribution device that is arranged on bottom, coalescence reunion district.
Also comprise the continuous moisture film deashing device being located on the pre-charging area of secondary, between described continuous moisture film deashing device and coalescence reunion district, be provided with at least spray deashing device of one-level.
Also comprise the exhanst gas outlet district that is located at device bottom, described exhanst gas outlet district is provided with the exhaust pass of one 3 o ~ 15o, and described exhaust pass inside is provided with demister.
Described demister outlet side is provided with the special spray head of demister.
Also comprise the ash discharge district that is located at device bottom, described ash discharge district is provided with taper ash bucket, and the outlet of described taper ash bucket bottom is provided with water seal.
The die opening of described discharge electrode and dust collecting electrode is 150 ~ 350mm.
The utility model has the advantages that: can with the efficient combination of wet desulphurization, can not only remove the fine particulates in former flue gas, can also remove the SO in wet-method desulfurized fume 3the fine particulates such as acid mist, water droplet, heavy metal, ensure dust content≤20mg/m in discharge flue gas 3, removal efficiency>=90% of PM2.5.
Brief description of the drawings
Below in conjunction with embodiment accompanying drawing, the utility model is described in further detail
Fig. 1 is the utility model example structure schematic diagram.
Description of reference numerals: 1, dust charging area; 2, positive electrode; 3, positive corona discharge district; 4, flue gas turbulent flow device; 5, coalescence reunion district; 6, negative electrode; 7, negative corona discharge district; 8, airflow uniform distribution device; 9, spray deashing device; 10, continuous moisture film deashing device; 11, high voltage source, 12, the pre-charging area of secondary; 13, dust collection section, 14, discharge electrode; 15, dust collecting electrode; 16, exhaust pass; 17, exhanst gas outlet district; 18, demister; 19, spray head; 20, ash discharge district; 21, taper ash bucket; 22, water seal.
specific implementation method
The present embodiment provides a kind of a kind of device that removes PM2.5 in wet flue gas as shown in Figure 1, gas approach end is arranged on the left upper end of device, smoke outlet is located at the lower right corner of device, comprise the dust collection section 13 that is located at the dust charging area 1 of device top flue gas entrance point and is located at device middle part, it is characterized in that: also comprise the pre-charging area 3 of secondary that is arranged on 13 tops, dust collection section; The pre-charging area 12 of described secondary is to form pre-charging area to carry out dust charged by lengthening the discharge electrode 14 being vertically arranged in dust collection section 13, and the length of lengthening is 300mm ~ 2000mm.
Gas approach end is arranged on the left upper end of device, and smoke outlet is located at the lower right corner of device, is conducive to dust catching to control of dust level 15 and flows downward smoothly, strengthens dust and aerosol collection in flue gas.
First flue gas enters dust charging area 1, when part fine particle enters the positive corona discharge district 3 that positive electrode 2 produces by lotus positive electricity, when another part flue gas enters the negative corona discharge district 7 that negative electrode 6 produces by bear electricity, the fine particle that two parts lotus has different electric charges with flue gas through being arranged on the turbulent device 4 of flue gas between coalescence reunion district 5 and dust charging area 1.
Flue gas turbulent flow device 4 adopts patent document (application number: public technology 200810031913.4).Compared with baffle plate in documents, flue gas turbulent flow device 4 mixes, better effects if.
Flue gas enters the coalescence reunion district 5 that is arranged on device upper right quarter, fine particle is under the effect of flue gas turbulent flow device 4, mix collision, and there is coalescence effect in the fine particle with different electric charges under electric charge gravitation, impel fine particle coalescence to be agglomerated into bulky grain thing, then through being arranged on the airflow uniform distribution device 8 of bottom, coalescence reunion district.
Because the flue gas turbulent flow device 4 of leading portion aggravates flue gas mixability, improve dust collision reunion effect, reduce flue gas uniformity coefficient, more even in order to ensure the flue gas that enters dust collection section 13 electric fields, improve efficiency of dust collection, increase airflow uniform distribution device 8, the multihole distributor that adopts vast stretch of wooded country cleaner Manufacturing Co., Ltd of Linzhou City to produce, specification FBB-Φ 100*6.
Enter the pre-charging area 12 of secondary that is arranged on 13 tops, dust collection section, further increase particle surface charge quantity, flue gas carries electrically charged particle thing and enters the dust collection section 13 that is located at device middle part subsequently, dust collection section is to produce uniform electric field by the discharge electrode 14 of external high voltage power supply 11, particle is deposited in the dust collecting electrode 15 being vertically arranged in dust collection section 13 under the effect of electric field force, field gas velocity is 1.0 ~ 2.5m/s, the die opening of discharge electrode and dust collecting electrode is 150 ~ 350mm, compare documents, die opening increases, electric field force also increases, and therefore dust removing effects is better.
The moisture film that is located at the continuous moisture film deashing device 10 spray formation on the pre-charging area of secondary rinses the Deposited particulate matter in dust collecting electrode 15 to enter in the taper ash bucket 21 that is located at ash discharge district 20, be located at spray deashing device 9 intermittent duties of at least one-level between continuous moisture film deashing device 10 and coalescence reunion district 5 simultaneously, cleaning down discharge electrode 14 and dust collecting electrode 15, the waste water of generation also enters taper ash bucket 21.
Moisture film deashing device 10 continuously, the PZ8080QZ11 type air atomizer spray nozzle that the SU22DF-SS type that employing is produced by Sipurui Spray System (Shanghai) Co., Ltd. or Boji Spray System Co., Ltd., Jiangsu Prov. produce forms.
The PZ6060KZ1 type hollow cone nozzles that spray deashing device 9 adopts the 1/4A-SS-50 type solid-cone (type) nozzle produced by Sipurui Spray System (Shanghai) Co., Ltd. or Boji Spray System Co., Ltd., Jiangsu Prov. to produce forms.
Flue gas by dust collection section 13 after out turns to laggard inlet/outlet flue 16 through being located at the exhanst gas outlet district 17 of device bottom, and described exhaust pass 16 is 3 o ~ 15o, and by discharge system after the further demist of demister 18.
In flue gas after wet dust removal, contain a large amount of moisture, must be less than 75mg/m according to moisture concentration in national requirements discharge flue gas 3, therefore need to install additional efficient baffle plate type or screen type demister.
Demister 18 uses for a long time, does not remove clean PM in flue gas 2.5easily stop up demister 18, affect dust removing effects.The special spray head 19 of demister 18 that is located at demister 18 outlet sides cleans, and just can address this problem.
The dust-laden waste water that flushing dust collecting electrode 15 produces enters the taper ash bucket 21 that is located at ash discharge district 20, then recycles by being located at after the water seal 22 discharge systems of taper ash bucket 21 lower part outlets are processed.
When the operation of this device, be negative pressure operation, need to adopt water seal 22 ensure floss hole sealing, the dust-laden waste water of discharge is similar to wet desulphurization waste water composition, can with desulfurization wastewater mixed processing after recycle, the object that realization is saved water and energy.
Produce the glass furnace production line of 600 tons daily, the exhaust gas volumn that kiln produces is 131000Nm 3/ h, kiln flue gas out, after waste heat boiler reclaims heat, enters wet desulfurization system and removes the SO in flue gas 2, SO in flue gas 2content≤200mg/Nm 3, removing SO 2in time, removes coarseparticulate in flue gas, and flue gas after desulfurization is saturated wet flue gas, and in flue gas, particle concentration is about 660mg/Nm 3, this part particle is mainly PM 2.5(dust, acid mist, water droplet, heavy metal) etc.Flue gas after wet desulphurization enters this device, the PM in flue gas 2.5particulate is removed, and flue gas is purified, dust content≤20mg/Nm in the flue gas after purification 3, PM 2.5≤ 20 μ g/Nm 3.
The foregoing is only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all contained among the scope of the claims of the present utility model.

Claims (8)

1. one kind removes the device of PM2.5 in wet flue gas, comprise the dust collection section (13) that is located at the dust charging area (1) of device top flue gas entrance point and is located at device middle part, it is characterized in that: gas approach end is arranged on the left upper end of device, smoke outlet is located at the lower right corner of device; Also comprise the pre-charging area of secondary (3) that is arranged on top, dust collection section (13); The pre-charging area of described secondary (12) is to form pre-charging area to carry out dust charged by lengthening the discharge electrode (14) being vertically arranged in dust collection section (13), and the length of lengthening is 300mm ~ 2000mm.
2. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 1, it is characterized in that: described dust collection section (13) also comprise and are vertically arranged on the dust collecting electrode (15) in dust collection section (13) and are connected with device case and the high voltage source (11) of ground connection, and described high voltage source (11) be that discharge electrode (14) is powered.
3. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 1, it is characterized in that: also comprise the coalescence reunion district (5) that is arranged on device upper right quarter, between described coalescence reunion district (5) and dust charging area (1), be provided with flue gas turbulent flow device (4).
4. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 3, is characterized in that: also comprise the airflow uniform distribution device (8) that is arranged on bottom, coalescence reunion district (5).
5. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 3, it is characterized in that: also comprise the continuous moisture film deashing device (10) being located on the pre-charging area of secondary (3), between described continuous moisture film deashing device (10) and coalescence reunion district (5), be provided with at least spray deashing device (9) of one-level.
6. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 1, it is characterized in that: also comprise the exhanst gas outlet district (17) that is located at device bottom, described exhanst gas outlet district (17) is provided with the exhaust pass (16) of one 3 ~ 15o, and described exhaust pass (16) inside is provided with demister (18).
7. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 6, is characterized in that: described demister (18) outlet side is provided with the special spray head of demister (19).
8. a kind of device that removes PM2.5 in wet flue gas as claimed in claim 1, also comprise the ash discharge district (20) that is located at device bottom, it is characterized in that: described ash discharge district (20) is provided with taper ash bucket (21), the outlet of described taper ash bucket (21) bottom is provided with water seal (22).
CN201420141075.7U 2014-03-27 2014-03-27 Device for removing PM2.5 from wet flue gas Expired - Fee Related CN203853168U (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104437068A (en) * 2014-11-11 2015-03-25 南京中电环保科技有限公司 Efficient wet desulfurization dust removal system and method
CN106733185A (en) * 2016-12-31 2017-05-31 江苏博际环境工程科技有限公司 A kind of downstriker wet static dedusting demisting flue gas minimum discharge device
CN107051736A (en) * 2016-10-25 2017-08-18 上海发电设备成套设计研究院 A kind of vertical wet cottrell high-efficiency demisting apparatus
CN107321500A (en) * 2017-06-29 2017-11-07 苏州艾特斯环保设备有限公司 Electrostatic spray deduster
CN109357275A (en) * 2018-09-19 2019-02-19 西安理工大学 A kind of civil heating stove flue gas purifying equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104437068A (en) * 2014-11-11 2015-03-25 南京中电环保科技有限公司 Efficient wet desulfurization dust removal system and method
CN104437068B (en) * 2014-11-11 2016-06-08 南京中电环保科技有限公司 A kind of high-efficiency wet-desulfurizing dust pelletizing system and method
CN107051736A (en) * 2016-10-25 2017-08-18 上海发电设备成套设计研究院 A kind of vertical wet cottrell high-efficiency demisting apparatus
CN107051736B (en) * 2016-10-25 2019-07-23 上海发电设备成套设计研究院 A kind of vertical wet cottrell high-efficiency demisting apparatus
CN106733185A (en) * 2016-12-31 2017-05-31 江苏博际环境工程科技有限公司 A kind of downstriker wet static dedusting demisting flue gas minimum discharge device
CN107321500A (en) * 2017-06-29 2017-11-07 苏州艾特斯环保设备有限公司 Electrostatic spray deduster
CN109357275A (en) * 2018-09-19 2019-02-19 西安理工大学 A kind of civil heating stove flue gas purifying equipment

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141001

Termination date: 20170327

CF01 Termination of patent right due to non-payment of annual fee