Control fine particle PM
2.5The electric-bag complex dust collector of collaborative demercuration
Technical field
The present invention relates to industrial dust collector, especially relate to a kind of control fine particle PM that is mainly used in purifying the air pollutants of discharging in the industrial processes such as thermoelectricity, cement, iron and steel
2.5The electric-bag complex dust collector of collaborative demercuration.
Background technology
Along with the fast development of economy, the day by day raising of living standards of the people, country is more and more tighter to air quality control requirement, simultaneously performance and the reliability of cleaner is had higher requirement.
PM
2.5Refer to that aerodynamic diameter is less than the particle of 2.5 μ m, PM
2.5Be easy to toxic heavy metal, acidic oxide and organic pollution etc. in the enriched air, it can suck the properties of lungs, to the harm of health more than PM
10Greatly.Country pays much attention to PM
2.5The control of polluting, in November, 2011, State Council's " national environmental protection " 12 " planning " clearly proposes " to carry out ozone, fine particle (PM in zones such as Beijing-Tianjin Ji, the Yangtze River Delta and Pearl River Deltas
2.5) etc. pollutant monitoring "; In December, 2011, Chinese Ministry of Environmental Protection's review has also been passed new " ambient air quality " in principle, and new standard is first with PM
2.5Include conventional Air Quality Evaluation in, implement in China.PM
2.5The improvement of ultrafine dust is referred unprecedented height is strengthened PM
2.5The research and development of control technology equipment are imminent.
Simultaneously the Chinese government also pays much attention to the mercury pollution preventing and controlling, and State Council repeatedly transmits and relevantly pollutes the control notice, and has formally issued " heavy metal pollution integrated control " 12 " planning ".At present China's coal-burning power plant's Mercury In The Air pollutes the control pilot work and formally starts, and has stipulated the emission limit of mercury and mercuric compounds in (GB13223-2011) in new discharge standard " fossil-fuel power plant atmospheric pollutant emission standard ".Yet the demercuration technology that the at present domestic and international mercury control technology that also lacks economical and efficient, so Speeding up development has China's independent intellectual property right seems particularly urgent.
At present mainly adopt electrostatic precipitator and sack cleaner two kind equipments for the removal of particle in the coal-fired flue-gas.Electrostatic precipitator is better to the larger flue dust removal effect of particle, but the removal efficient of fine particle is had much room for improvement; The efficiency of dust collection of bag-type dusting is higher, and fine particle is had preferably removal effect, but because dust concentration is higher, causes the bag-type dusting deashing frequent, reduces the service life of filter bag, and increases maintenance cost and management difficulty.And electricity bag compound dust-collection device (the dedusting combination of electric back pkt. before adopting) has solved preferably electric cleaner or sack cleaner and has used separately existing technical problem underlying, but to fine solid particle PM
2.5Still need further to strengthen with the capture aspect of heavy metal Hg.
Chinese patent CN102614728A discloses a kind of control PM
2.5The street lamp rod-type water mist dust fall device that air quality exceeds standard; Comprise the shaft tower base, wherein said shaft tower chassis side is provided with electric control gear and water tank; Be provided with the support roofbolt at the shaft tower base, be provided with support platform in the support bar column top, be provided with water mist dust fall injection equipment and PM in support platform
2.5Supervising device; Be connected by pipeline between described water mist dust fall injection equipment and the water tank, be provided with booster pump at this pipeline; Described electric control gear respectively with water mist dust fall injection equipment, PM
2.5Supervising device is connected with the booster pump circuit.
Chinese patent CN102641636A discloses a kind of control PM
2.5The high building water mist dust fall device that air quality exceeds standard; Comprise little mist depositing dust injection equipment, wherein said little mist depositing dust injection equipment distributing installation is at each building top, and the atomized dust settling edges of regions of adjacent little mist depositing dust injection equipment overlaps, and forms high-altitude atomized dust settling guard; The equal pipeline of described each little mist depositing dust injection equipment connects the feed pipe of city tap-water, and the pipeline between feed pipe and little mist depositing dust injection equipment is equipped with the high pressure liquid pump, and described each high pressure liquid pump all is connected with electric control gear; The equal circuit of described each electric control gear is connected with PM
2.5Supervising device, each PM
2.5Supervising device is arranged on the side of corresponding little mist depositing dust injection equipment.
Summary of the invention
The object of the present invention is to provide a kind of control fine particle PM
2.5The electric-bag complex dust collector of collaborative demercuration.
The present invention is provided with electric-bag complex dust collector, adsorbent jetting device and absorbent container; Described electric-bag complex dust collector is provided with import loudspeaker, housing, electric field region, electricity bag transition region, bag-type dusting district, ash bucket, air-purifying chamber and exhaust pass; Described import loudspeaker are located at the import of housing, and electric field region, electricity bag transition region and bag-type dusting district are located in the housing, and electric field region is located at the rear of import loudspeaker, and electricity bag transition region is located between electric field region and the bag-type dusting district; Ash bucket is located at the bottom of housing, and air-purifying chamber is located at top, bag-type dusting district, and exhaust pass is located at the air-purifying chamber top and is communicated with air-purifying chamber; Described adsorbent jetting device and absorbent container are located at the top of electricity bag transition region, and the discharging opening of absorbent container is connected with the charging aperture of adsorbent jetting device.
Described electricity bag transition region is provided with at least 2 group positive plate and discharge electrodes, and positive plate and discharge electrode consist of the electric field passage, and the electric field passage is respectively by positive electric field and negative electric field staggered, and the fore-and-aft distance of described electricity bag transition region can be 400~6000mm; The electricity bag same pole span of transition region plate (being the distance between positive plate and the discharge electrode) can be 300~1200mm.
Described adsorbent jetting device can be provided with at least 1 sorbent injection pipe, and described sorbent injection pipe puts in the rear portion of electric field region and the front of electricity bag transition region; Preferably be provided with at least 1 spray-hole on the described sorbent injection pipe, on the described spray-hole nozzle be installed.The nozzle of adjacent sorbent injection pipe shifts to install.
The present invention utilizes the characteristic of coalescence technology and absorbent absorption mercury, is used for control fine solid particle PM
2.5Discharging with mercury.
Because adsorbent jetting device of the present invention adopts the multi-tube multi-hole dislocation relatively to spray, be that the adsorbent jetting device has many pipes to put in the rear portion of electric field region, and be provided with a plurality of holes at every pipe, then install nozzle, and the dislocation of the nozzle on per two pipes layout, and relatively spray absorbent, therefore, absorbent is fully mixed with flue gas, and absorbent is more evenly distributed, absorbent demercuration better effects if.
Description of drawings
Fig. 1 is that the structure of the embodiment of the invention forms schematic diagram.
Fig. 2 is the schematic top plan view of Fig. 1.
Fig. 3 is that the A of Fig. 2 is to schematic diagram.
Fig. 4 is that the structure of electric field region, electricity bag transition region and the adsorbent jetting device of the embodiment of the invention forms schematic diagram.
In Fig. 1~4, respectively be labeled as: 1-import loudspeaker, 2-housing, 3-electric field region, 4-electricity bag transition region, 5-bag-type dusting district, 6-ash bucket, 7-filter bag, 8-air-purifying chamber, 9-exhaust pass, 10-adsorbent jetting device, 11-absorbent container, 101-absorbent playpipe, 102-spray-hole, 103-nozzle.
The specific embodiment
The present invention is further illustrated in connection with accompanying drawing for following examples.
Referring to Fig. 1~4, the embodiment of the invention is provided with electric-bag complex dust collector, adsorbent jetting device 10 and absorbent container 11; Described electric-bag complex dust collector is provided with import loudspeaker 1, housing 2, electric field region 3, electricity bag transition region 4, bag-type dusting district 5, ash bucket 6, air-purifying chamber 8 and exhaust pass 9; Described import loudspeaker 1 are located at the import of housing 2, and electric field region 3, electricity bag transition region 4 and bag-type dusting district 5 are located in the housing 2, and electric field region 3 is located at the rear of import loudspeaker 1, and electricity bag transition region 4 is located between electric field region 3 and the bag-type dusting district 5; Ash bucket 6 is located at the bottom of housing 2, is provided with filter bag 7 in the bag-type dusting district 5, and air-purifying chamber 8 is located at 5 tops, bag-type dusting district, and exhaust pass 9 is located at air-purifying chamber 8 tops and is communicated with air-purifying chamber 8; Described adsorbent jetting device 10 and absorbent container 11 are located at the top of electricity bag transition region 4, and the discharging opening of absorbent container 11 is connected with the charging aperture of adsorbent jetting device 10.
Described electricity bag transition region is provided with at least 1 group positive plate and discharge electrode, and positive plate and discharge electrode consist of the electric field passage, and the electric field passage is respectively by positive electric field and negative electric field staggered, and described electricity bag transition region 4 fore-and-aft distances can be 400~6000mm; The electricity bag same pole span of transition region plate (being the distance between positive plate and the discharge electrode) can be 300~1200mm.
Described adsorbent jetting device 10 can be provided with at least 1 sorbent injection pipe 101, and described sorbent injection pipe 101 puts in the rear portion of electric field region 3 and the front of electricity bag transition region 4; Preferably be provided with at least 1 spray-hole 102 on the described sorbent injection pipe 101, on the described spray-hole 102 nozzle 103 be installed.The nozzle 103 of adjacent sorbent injection pipe 101 shifts to install.
Control principle of the present invention is: the structure of utilizing existing electric-bag complex dust collector, regulate the position in electric field region 3 and bag-type dusting district 5, namely fore-and-aft distance is the electricity bag transition region 4 of 400~6000mm between electric field region 3 and bag-type dusting district 5, and the electricity bag same pole span of transition region plate (being the distance between positive plate and the discharge electrode) is 300~1200mm.Jetting device 10, absorbent container 11 are set on electric field region 3, absorbent container 11 feed are to adsorbent jetting device 10, more than 10 pipe of adsorbent jetting device puts in the rear portion of prime electric field region 3, and open a plurality of holes at every pipe, nozzle is installed on the hole, and the dislocation of the nozzle on per two pipes is arranged, and relatively spray absorbent, this spray regime can make absorbent fully mix with flue gas, and absorbent is more evenly distributed, absorbent demercuration better effects if.
As illustrated in fig. 1 and 2, when dust and absorbent enter electricity bag transition region 4, distinguished positive electricity and negative electricity on the lotus.When flue gas leaves an electricity bag transition region 4 and enters bag-type dusting district 5, coagulation and effect can occur by charges of different polarity Coulomb force with electronegative absorbent and electronegative dust in the absorbent of positively charged and positively charged dust in the flue gas, thereby dust is become the bulky grain thing with the absorbent coalescence, and charged fine dust and charged mercury trapped on the bulky grain thing, be formed with the particle that is beneficial to the large particle diameter that filter bag captures.Especially with plus-minus electric absorbent can with charged dust in mercury generation coalescence effect, can effectively strengthen the absorption ability to mercury in the charged dust.It is more abundant that the dedusting structure of the electricity bag transition region 4 of the positive negative electricity interlaced arrangement of this many groups mixes both positive and negative polarity, and the coalescence better effects if can effectively be controlled PM by the coalescence technology
2.5The discharging of fine solid particle and mercury.
Flue gas flow of the present invention is: flue gas passes in the import loudspeaker 1, behind import loudspeaker 1 airflow uniform distribution, flue gas enters in the housing 2 more uniformly, after passing through successively again electric field region 3, electricity bag transition region 4,5 dedustings of bag-type dusting district, clean flue gas enters air-purifying chamber 8, at air-purifying chamber 8 interior installation pulse ash removers filter bag 7 is carried out deashing, the deashing of electric field region 3 then relies on the rapping apparatus that himself arranges, the dust that last deashing falls is fallen in the ash bucket 6, and by ash-transmission system the flying dust in the ash bucket 6 is in time cleared up.And the smoke gas flow inlet/outlet flue 9 of air-purifying chamber 8 is discharged flue gas.
Described electricity bag transition region 4 is arranged between electric field region 3 and the bag-type dusting district 5, and advantage is:
(1) prime electric field region 3 can be removed in the flue gas about 80% dust, reduces the concentration of dust in the flue gas, reduces charged competition and the interference of dust thicker in the electricity bag transition region 4, improves fine solid particle PM
2.5With the charged effect of mercury, improve fine solid particle PM
2.5With the arresting efficiency of mercury, the dust concentration of low concentration has also reduced the consumption of absorbent simultaneously.
(2) because after absorbent sneaks into flying dust, can be on the negative impact of the mass formation of flying dust, thus cause flying dust secondary utilization rate low.Therefore electricity bag transition region 4 is arranged between electric field region 3 and the bag-type dusting district 5, can effectively solves the low problem of flying dust secondary utilization rate.
As shown in Figure 4, the discharge electrode of electric field region 3 connects negative electricity, the pole plate ground connection of the pole plate of electric field region 3 and electricity bag transition region 4, and the discharge electrode of electricity bag transition region 4 connects positive electricity and negative electricity interlaced arrangement.