CN1010384B - Dust-collecting electrostatic precipitator - Google Patents
Dust-collecting electrostatic precipitatorInfo
- Publication number
- CN1010384B CN1010384B CN 85105111 CN85105111A CN1010384B CN 1010384 B CN1010384 B CN 1010384B CN 85105111 CN85105111 CN 85105111 CN 85105111 A CN85105111 A CN 85105111A CN 1010384 B CN1010384 B CN 1010384B
- Authority
- CN
- China
- Prior art keywords
- dust
- collecting
- electric field
- electrostatic precipitator
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
In order to remove dust from flue gas of which the flow speed reaches 25000 standard m3/h and cause the dust content of the flue gas to be less than 50 mg per standard m3, the present invention provides an electrostatic dust collection dust remover with the airflow vertically flowing in the electrostatic dust collection dust remover. The dust remover is provided with four electric fields with same design, and the electric fields are installed in the same outer shell. The cross section of the outer shell is approximately in a square shape. When dust collection electrodes in the electric fields 3B and 3A are respectively blown and cleaned in the mode of vibration strike, gas can selectively flow through 1-2-3A or 1-2-3B. The dust remover is in an integral structure, so the dust remover is especially used as a succeeding installation device in small power plants or similar factories (disclosed in drawing 1).
Description
The relevant a kind of dust-collecting electrostatic precipitator of the present invention, it can carry out dedusting in flow per hour reaches the flue gas stream of 25000 standard cubic meters, make the dustiness that purifies rear pass gas be lower than 50 milligrams of every standard cubic meters, this deduster comprises: be furnished with the compound collecting field of corona and collecting electrode, be used for cleaning the device of electrode and the equipment that optionally changes flow process at gas channel.
In some small-sized power plants, because the rules of requirement of shelter are strict, need deduster of subsequent installation sometimes.This respect is typically the use bag hose.But fall and need higher maintenance cost because bag hose can cause too high pressure, so should not install as follow-up equipment.On the other hand, if adopt the common electrostatic duster of the flat collecting electrode that has the horizontal gas runner and know, handle the horizontal waste gas stream of flow up to 25000 standard cubic meters per hour, guarantee to purify back gas dustiness so and be lower than 50 milligrams of every standard cubic meters, then the shell sizes of deduster can be too big.Because in fact the restriction in space can't install it as follow-up equipment.Because to be lower than per second be inappropriate for 1 meter to gas flow rate in deduster,, like this,, must cause the out-of-proportion increase of shell expense because the ratio of effective volume and external surface area is improper so the shell of deduster is can very long circulation area then less.Owing to this reason, under these conditions if usage level stream deduster can make cost of equipment out-of-proportion too high.So just, reduce the pressure that produces owing to this deduster and fallen the little benefit that obtains.
The purpose of this invention is to provide an expensive lower electrostatic precipitator in above-mentioned range of application.Pressure fall and maintenance cost aspect, this deduster will be better than bag hose.And on appearance structure, can wish to overcome the shortcoming of the flat deduster that is used for horizontal gas flow again.In addition, this new deduster is a structural entity, is suitable for as small power plant or with the follow up device of class factory.
Begin most described dust-collecting electrostatic precipitator above the employing, just can realize this purpose.The characteristics of new deduster are, it places four identical electric fields of design cardinal principle in the same shell, the cross section of this shell is approximately a square, each electric field all is furnished with the tubulose collecting electrode that is used for uprush, between each electric field, also leave the overflow gap, its characteristics are again, by means of the equipment that changes flow process, as electric field 3B or 3A during in cleaning, can selectively electric field be unified into gas channel Z1-Z2-Z3A or Z1-Z2-Z3B respectively, its characteristics also are like this at gas channel Z1, Z2 and Z3A, between the Z3B, can have a large channel at least, this passage is convenient to hold the auxiliary equipment that can work therein.
Other characteristics of the present invention will be described in dependent claims 2 to 7.
Further details and advantage will be described in detail referring to figs. 1 to the embodiment of Fig. 3.
Fig. 1 is that the master of deduster looks perspective view.
Fig. 2 is the projection sketch on deduster top.
Fig. 3 is the projection sketch of deduster bottom.
As shown in Figure 1, the cross section of shell 2 is approximately a square.Though the shell shown in the figure is to be supported by four support columns 3, as an integrally-built deduster, considers site condition, nature can be installed with diverse ways.Include four essentially identical gas flow process districts in the shell 2.On shell 2, can see the insulation fulcrum 4 of the corona discharge systems that is used to support four associations.Below shell 2, can see related dust collecting box 5.An input pipe is equipped with at the top of shell 2, in its bottom a discharge pipe 7 is housed.Major path 8 and 9 places between each gas flow process district.They all are suitable for holding the auxiliary equipment that can work therein.
As shown in the Examples, the gas that enters from air inlet pipe 6 in the first pass district is from the overhead stream to the bottom.Flow to the top in the second flow process district from the bottom.And then from the overhead stream in one of two the 3rd flow process districts to the bottom.Gas and cleaning are alternately flow through with changing in these two the 3rd flow process districts.
Referring to figs. 2 and 3, being described in more detail below, gas replaces the process that flows through above-mentioned flow process with changing.In these two figure, the wall that is used to limit the shell 2 in Z3B flow process district all is omitted.Fig. 2 is a perspective view, because top structure is removed, can see deduster from above among the figure.Fig. 3 is after all parts below the divisional plane between shell and dust collecting box all are removed, the view of the deduster inside of seeing from below.Flow process district Z1 is limited both sides by shell, and both sides are limited by wall 10 and 14 in addition.Wall 10 and wall 14 play a part at the top other flow process district hermetic seal.At the lower part of Fig. 3, a little higher than divisional plane of the terminal of wall 10.An overflow ducts is just arranged between flow process Z1 and Z2 like this, and gas just can flow to the top from the bottom in flow process district Z2.
In Fig. 3, wall 14 is divided into wall 15 and wall 16 extends downwards, and they are at flow process Z3B, major path 8 and 9 and delivery pipe 18b between play the hermetic seal effect.
The outside of flow process district Z3A and Z3B is limited by each wall of shell.Be extended in inside to the wall 12 between the above-mentioned flow process district and limit.Their upper part is then limited by the sidewall 19 and 20 of passage 8.Clearly, sidewall 19 and 20 does not extend to the plane, top, and only extends to the interface, top of passage 8.So overflow gap 11a and 11b are limited between passage 8 and the top cover, and by baffle plate 13 or with base part they mutual airtight sealing.Can also see that from Fig. 2 baffle plate is in and is parallel to overflow gap 11a and 11b position longitudinally.So gas can flow to flow process district Z3B or Z3A from flow process district Z2.
As shown in Figure 3, the discharge-channel 18a and the 18b of two correspondences arranged at the bottom of deduster.They be positioned in passage 9 below.Baffle plate 17 is in sealing state as shown in the figure with mutual airtight the sealing of two passages.Wall 12 extends downward divisional plane, works to limit gas flow between flow process district Z3A and the Z3B.
Selecting the gas Z3A that flows through still be the Z3B zone, is by baffle plate 13 and 17 and the structure of overflow gap 11a, 11b and exhaust passage 18a, 18b and determining jointly.Situation shown in Figure 2, gas can flow into flow process district Z3A and Z3B at the top, but only can flow out from flow process Z3B in the bottom.Its reason is that as shown in Figure 3, gas can not flow to discharge-channel 18b from discharge-channel 18a.In this case, only can be from the gas that flow process Z2 flows into by flow process district Z3B, flow process district 3A then can be by rapping blowing cleaning.
When baffle plate 13 and 17 all rotated 90 ℃, gas just can not be gone into flow process district Z3B from overhead stream, but by flow process district Z3A.In the bottom, gas will flow into discharge-channel 18b by the baffle plate of opening 17 from discharge-channel 18a, and discharge shell 2 from passage 18b.In such cases, flow process district Z3B can be cleared up.Like this with regard to dust reentrainment of dust that can not take place to collect in advance and the phenomenon of being carried secretly away by gas.
The collecting electrode of not expressing in Fig. 2 and Fig. 3 is made of vertical tube.The cross section of this body can be circle, square or hexagon.There is a corona discharge electrode of knowing style in central authorities at pipe.Since in tubular collecting electrode, can form than plate electrode even the electric field of Duoing, so this collecting electrode is better than flat collecting electrode.
Owing to used this convertible collecting electrode, the flow process district that air-flow has just been flow through is cleaned, and this paper begins institute's requirement and then can be met with preferred plan.Be above-mentioned purpose, can produce economy, compact conformation and deduster efficiently very expediently.
For the ease of relatively, provide some design datas here.The data that have the common deduster of flat collecting electrode are listed in hurdle 1.List in hurdle 2 by the data of the deduster that the present invention produced.The condition of two kinds of situations all is: gas flow is 12000 standard cubic meters per hour, and gas temperature is 180 ℃, and untreated gas dustiness is every standard cubic meter 15 grams, and handling back gas dustiness is every standard cubic meter 0.05 gram.
The contrast of design data: (table is seen the literary composition back)
Clearly, under the situation that obtains the dust removing effects identical with common deduster, costing of new deduster is much lower, and pressure falls and only increases by 15%.As seen, for above-mentioned purpose, deduster provided by the invention is economical especially.
(title) (unit) 12
Dust-collecting area square metres 710 440
Control of dust channel cross-sectional area square metres 23
Overall dimensions are long * wide * high rice 21 * 3.5 * 11.5 5 * 6 * 12
Closed volume cubic meter 300 175
Floor space cubic meter 75 30
Rice crust 20 23 falls in pressure
Gas flow rate meter per second 0.85 2.0
Claims (7)
1, being used for flow velocity per hour is that the flue gas of 25000 standard cubic meters is collected dust, thereby the dustiness that makes dedusting rear pass gas is lower than the dust-collecting electrostatic precipitator of 50 milligrams of every standard cubic meters, comprising, the compound collecting field of being furnished with corona and collecting electrode, be used for cleaning the device of electrode and the equipment that optionally changes flow process at gas channel, it is characterized in that, the cross section of deduster shell is approximately a square, include four essentially identical electric fields of design in the shell, each electric field all is furnished with between the tubulose collecting electrode that is used for uprush and each electric field and leaves the overflow gap, by means of the equipment that changes flow process, when electric field 3B or 3A are cleared up, can select electric field with composition gas channel Z1-Z2-Z3A or Z1-Z2-Z3B respectively, and, at gas channel Z1, Z2 and Z3A, between the Z3B, form a large channel at least, this passage is convenient to hold the auxiliary equipment that can work therein.
2, dust-collecting electrostatic precipitator according to claim 1 is characterized in that, collecting electrode is made up of cylindrical tube.
3, dust-collecting electrostatic precipitator according to claim 1 is characterized in that, collecting electrode is that foursquare pipe is formed by cross section.
4, dust-collecting electrostatic precipitator according to claim 1 is characterized in that, collecting electrode is that hexagonal pipe is formed by cross section.
5, according to any one described dust-collecting electrostatic precipitator in the claim 1 to 4, it is characterized in that, electric field 1,2, the dust collecting box of 3A and 3B is associated with common discharging fully sheathed case.
6, according to any one described dust-collecting electrostatic precipitator in the claim 1 to 4, it is characterized in that the gas flow direction preferably in electric field 1 from the overhead stream to the bottom, in electric field 2, flow to the top from the bottom, in electric field 3A and 3B then alternately both one of in from the overhead stream to the bottom.
7, according to any one described dust-collecting electrostatic precipitator in the claim 1 to 4, it is characterized in that, overflow gap, top (11a and 11b) and bottom discharge-channel (18a and 18b) are provided, by baffle plate (13 and 17) respectively with overflow gap (11a, 11b) and discharge-channel (18a, 18b) mutual airtight sealing is so that the checker air flow stream is crossed electric field 3A and 3B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85105111 CN1010384B (en) | 1985-07-04 | 1985-07-04 | Dust-collecting electrostatic precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85105111 CN1010384B (en) | 1985-07-04 | 1985-07-04 | Dust-collecting electrostatic precipitator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85105111A CN85105111A (en) | 1986-12-31 |
| CN1010384B true CN1010384B (en) | 1990-11-14 |
Family
ID=4794265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85105111 Expired CN1010384B (en) | 1985-07-04 | 1985-07-04 | Dust-collecting electrostatic precipitator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010384B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101474493B1 (en) * | 2010-01-29 | 2014-12-22 | 삼성전자 주식회사 | Electric precipitator and home appliance comprising the same |
| CN105080715B (en) * | 2015-08-07 | 2017-04-19 | 浙江大学 | Line pipe type high-temperature electrostatic precipitation device with particle flushing for dust removing and dust removing method |
-
1985
- 1985-07-04 CN CN 85105111 patent/CN1010384B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85105111A (en) | 1986-12-31 |
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