CN101732932A - Rigid filter dust collector with uniform axial flow speed - Google Patents
Rigid filter dust collector with uniform axial flow speed Download PDFInfo
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- CN101732932A CN101732932A CN201010103481A CN201010103481A CN101732932A CN 101732932 A CN101732932 A CN 101732932A CN 201010103481 A CN201010103481 A CN 201010103481A CN 201010103481 A CN201010103481 A CN 201010103481A CN 101732932 A CN101732932 A CN 101732932A
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- flow speed
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Abstract
The invention discloses a rigid filter dust collector with uniform axial flow speed, which comprises a box body, a dust discharging hopper, an air inlet, a filter element and an air outlet, wherein the dust discharging hopper is positioned at the bottom of the box body, the air inlet is positioned at the lower part of the box body, the filter element is positioned in the box body, the air outlet is positioned at the upper part of the box body, and the filter element is in a hollow structure with the sectional area gradually increasing from bottom to top. Compared with a traditional dust collector, the filter dust collector with the uniform axial flow speed has the characteristics of high dust collection efficiency, uniform and stable flow field, compact structure and high temperature resistance.
Description
Technical field
The present invention relates to filtering type dedusting technical field, be specifically related to a kind of rigid filter dust collector of uniform axial flow speed, be specially adapted to filtering type dedusting high-temperature gas or flammable explosive gas.
Background technology
Gas cleaning at high temperature is directly to carry out gas solid separation under hot conditions, realize a technology of gas purification, it can farthest utilize the physics sensible heat of gas, potential chemical heat and kinetic force and utilize useful resources in the gas most effectively, therefore, it becomes electric power, the research focus of the energy and relevant processing industry, in the modern industry generative process, the field that relates to dusty gas direct purification dedusting at high temperature and application is very extensive, as the coal gas of high temperature in the coal gasification combined cycle generation technological process in the energy industry, the high-temperature reacting gas of petrochemical industry and chemical engineering industry, metallurgical industry blast furnace and converter coal gas of high temperature, the high-temperature tail gas of glass industry, the drying of ceramic industry, boiler, the high-temp waste gas of incinerator etc.The purifying and dedusting of high-temperature gas is to realize the requisite key technology of high-temperature gas resource rational utilization, also is an advanced person's green technology simultaneously.
The filtering type dedusting is that present efficiency of dust collection is the highest, and effectively the dust collection method of the minimum grit of filtering particle diameter can make the dust content of gas be reduced to 50mg/Nm easily
3, even 10mg/Nm
3Below.But the filtering type dedusting also exists deduster bulky, and the gas flow that unit space is handled is low, cloth bag quick abrasion, the shortcoming that operating cost is high.Especially for high-temperature gas, because it is bulky (273 ℃ of the every raisings of temperature, volume increase be twice), above-mentioned shortcoming is more outstanding.For flammable explosive gas, the deduster volume is too huge also to be a unsafe factor.The bulky reason of filtration dust catcher is the speed that gas passes filter course, and it is very low just to wear bag speed, and the common bag speed of wearing is about 0.5m/min～3m/min.Bag speed is worn in raising will make the dedusting resistance increase rapidly, cause the dedusting energy consumption sharply to increase, thereby be worthless.The so low bag speed of wearing makes the inside and outside air velocity of filter bag be difficult to improve, and that is to say that in deduster inside, the air-flow velocity in most of space is on the low side, and this is the main cause that causes the filtration dust catcher volume bigger than normal.The filter bag shape of traditional vertical filtration dust catcher is cylindrical-shaped structure basically, and the cross-sectional area in the space that filter bag is inside and outside is along axially being identical.For the filtration dust catcher of following air inlet, on the ash-laden gas side, the axial velocity of past more overdraught is more little like this, and in the clean gas side, the axial velocity of past more overdraught is big more.That is to say that in traditional filtration dust catcher the flow velocity of most space gas is the reasonable flow velocity that is lower than air-flow, that is to say that the passage flow velocity of most air-flow is very low, this is the main cause that causes filtration dust catcher bulky.In addition, present filter pocket material generally can not be high temperature resistant, and the filtration dust catcher of high temperature costs an arm and a leg, and is difficult to be extensive use of industrial.
Summary of the invention
The present invention is in order to overcome the deficiency that above prior art exists, and provides that a kind of efficiency of dust collection height, even flow field are stable, the rigid filter dust collector of the uniform axial flow speed of compact conformation.
Purpose of the present invention realizes by following technical scheme: the rigid filter dust collector of this uniform axial flow speed, it is characterized in that: comprise casing, be positioned at bottom half ash-unloading hopper, be positioned at lower box air inlet, be positioned at the filter element of casing and be positioned at the air outlet on casing top, described filter element is that sectional area becomes big hollow-core construction from the bottom up gradually.
As preferred construction, described filter element is turbination, reverse frustoconic or inverted pyramid shape, and in the filter element outside, the rate of climb of dust-contained airflow is constant speed or almost constant speed, in filter element inside, the rate of climb of clean gas flow also is constant speed or almost constant speed.
Described filter element is a rigidity hollow forming structure.
Make for convenience, described filter element is the structure that plurality of sections is formed, and wherein the sectional area of each section equates, whole filter element is the pyramidal structure of inverted steps shape.The axial flow velocity of the inside and outside space of filter element this moment air-flow becomes approximate uniform flow.
In order to increase filter dirt area, described filter element is provided with transverse fold, vertical gauffer or oblique gauffer.
In order to strengthen rigidity, improve impact strength, high temperature resistant (can anti-600～800 ℃ of left and right sides high temperature), described filter element is single or multiple lift woven wire (a preferred heat-resisting steel material), unlikely generation distortion under gas flow purging, thus the uniform flow field of constant speed guaranteed.
For the ease of unloading ash, described ash-unloading hopper is a back taper, and the below of ash-unloading hopper is provided with unloading valve.
As a kind of preferred structure, the end face opening of described filter element, opening are towards the exhaust passage, and the exhaust passage connects air outlet, and air outlet connects air exhauster.
For the ease of blowing off into piece, oarse-grained dust, the casing inner top is provided with airduct, and airduct connects air compressor, air compressor supply compression clean gas, and airduct stretches in the opening of filter element end face, and each end of airduct is horn-like.
In actual applications, described filter element is several, and is arranged in matrix shape or circle.
The present invention has following advantage with respect to prior art:
Compare with existing deduster, the filtration dust catcher of vertical down air inlet outside filtering type uniform axial flow speed of the present invention has the efficiency of dust collection height, and even flow field is stable, and compact conformation can resistant to elevated temperatures characteristics, make a concrete analysis of as follows:
The present invention proposes the technical scheme of uniform axial flow speed rigid filter element, dusty gas becomes cleaning gas tream from the filter element outside by filtration and enters filter element inside, under the prerequisite that keeps bag speed of wearing not improve, make the air-flow axial velocity in the whole space of vertical dust removing device all remain on rational maximum speed.According to
At the filter element space outerpace, reduce gradually along the sectional area of the rising passway of dust-contained airflow, throughput also reduces gradually, thereby dust-contained airflow is a uniform axial flow speed; In the filter element inner space, sectional area along the clean gas flow rising passway increases gradually, throughput also increases gradually, thereby clean gas flow also is a uniform axial flow speed, such structure can maximize, reasonable use space, make the air-flow axial velocity in the whole space of deduster all remain on rational maximum speed, improve the utilization rate of the interior space of deduster as gas channel, thereby significantly reduce the volume of deduster, make device structure compacter, and can not bring negative effect simultaneously.The present invention is to flammable explosive gas, has the meaning of particular importance as the dedusting of the dedusting of coal gas and high-temperature gas, improved safe radix greatly.
In addition, filter element adopts single or multiple lift heat-resisting steel material silk screen, strengthened rigidity, improved impact strength, high temperature resistant (can anti-600～800 ℃ of left and right sides high temperature), unlikely generation distortion under gas flow purging, thereby guaranteed the uniform flow field of constant speed, and the wear-resistant ability of woven wire is much higher than traditional filter pocket material, the reduction replacement cost, and the rate of climb of the air-flow space of improving a lot, help the maximization of deduster of the present invention.
Description of drawings
Fig. 1 is the structural representation of the rigid filter dust collector of uniform axial flow speed of the present invention.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
The rigid filter dust collector of uniform axial flow speed as shown in Figure 1, comprise casing 1, be positioned at the ash-unloading hopper 2 of casing 1 bottom, be positioned at the air inlet 3 of casing 1 bottom, be positioned at the filter element 4 and the air outlet 5 that is positioned at casing 1 top of casing 1, filter element 4 becomes big hollow-core construction from the bottom up gradually for sectional area, filter element 4 is a turbination, in filter element 4 outsides, the rate of climb of dust-contained airflow is constant speed or almost constant speed, in filter element 4 inside, the rate of climb of clean gas flow also is constant speed or almost constant speed, and filter element 4 is a rigidity hollow forming structure.Filter element 4 is 28 evenly distributed row, totally 140.
In order to increase filter dirt area, filter element 4 is provided with vertical gauffer.
In order to strengthen rigidity, improve impact strength, high temperature resistant (can anti-600～800 ℃ of left and right sides high temperature), and filter element 4 be the single-layer metal silk screen, unlikely generation is out of shape under gas flow purging, thereby has guaranteed the uniform flow field of constant speed.
For the ease of unloading ash, ash-unloading hopper 2 is a back taper, and the below of ash-unloading hopper 2 is provided with unloading valve 6.
The end face opening of filter element 4, opening are towards the exhaust passage 7, and exhaust passage 7 connects air outlets 5, and air outlet 5 connects air exhausters.
For the ease of blowing off into piece, oarse-grained dust, casing 1 inner top is provided with airduct 8, and airduct 8 connects air compressor 9, air compressor 9 supply compression clean gas, airduct 8 stretches in the opening of filter element 4 end faces, and each end 10 of airduct 8 is horn-like.When deduster stops dedusting, filter element 4 is stained with dust, opens air compressor 10 so, and by airduct 8 blowings, the one-tenth piece of filter element 4, oarse-grained dust just can blow off.
Wait the superiority of axial upflow velocity as can be seen from following calculating:
The rate of climb of dust-contained airflow, clean gas flow equals the sectional area of throughput divided by rising passway, is formulated as follows:
A=A wherein
1-A
2, A
1Be total cross-sectional area of deduster, A
2Summation for the filter element cross-sectional area.
The sack cleaner of prior art, according to common sack cleaner method for arranging, the cloth bag diameter is 140mm, the filter bag spacing is 190mm * 190mm, and filter bag is 250mm to the spacing on card limit, arranges filter bag 14 * 10=140, then card is of a size of 2970mm * 2210mm, A=4.41m
2The long 5m of bag, total filter area is 307.7m
2, rate of filtration 1m/min, processing tolerance is 5.13m
3/ s, this moment, the rate of climb was 1.2m/s, and this speed has surpassed the higher limit of 1m/s, and the way of processing has only the spacing that strengthens between filter bag or reduces bag long and increase filter bag quantity, and this all means the increase of this deduster volume, the increase of floor space.If the bag spacing is increased to 210mm * 210mm, this moment, the rate of climb was 0.92m/s, meet the requirements, but the card area was increased to 3230mm * 2390mm, has increased by 18%.
And adopt the filtration dust catcher of vertical down air inlet outside filtering type uniform axial flow speed of the present invention, 1.2m/s the rate of climb can't cause the decline of performance of precipitator, thereby can adopt original arrangement (deduster of the present invention also can further dwindle the spacing of filter element, thereby further dwindles the volume of deduster).Here the rate of climb of Ji Suaning is an arithmetic mean of instantaneous value, in fact for existing deduster, dusty gas can constantly see through filter bag in uphill process enter filter bag inside, thereby is uneven in whole filter bag short transverse, and this has more limited the raising of the rate of climb.
The above-mentioned specific embodiment is the preferred embodiments of the present invention, can not limit the present invention, and other any change or other equivalent substitute mode that does not deviate from technical scheme of the present invention and made is included within protection scope of the present invention.
Claims (9)
1. the rigid filter dust collector of uniform axial flow speed, it is characterized in that: comprise casing, be positioned at bottom half ash-unloading hopper, be positioned at lower box air inlet, be positioned at the filter element of casing and be positioned at the air outlet on casing top, described filter element is that sectional area becomes big hollow-core construction from the bottom up gradually.
2. the rigid filter dust collector of uniform axial flow speed according to claim 1, it is characterized in that: described filter element is turbination, reverse frustoconic or inverted pyramid shape.
3. the rigid filter dust collector of uniform axial flow speed according to claim 2, it is characterized in that: described filter element is a rigidity hollow forming structure.
4. the rigid filter dust collector of uniform axial flow speed according to claim 1 is characterized in that: described filter element is the structure that plurality of sections is formed, and wherein the sectional area of each section equates, whole filter element is the pyramidal structure of inverted steps shape.
5. the rigid filter dust collector of uniform axial flow speed according to claim 1 is characterized in that: described filter element is provided with transverse fold, vertically gauffer or oblique gauffer.
6. the rigid filter dust collector of uniform axial flow speed according to claim 1, it is characterized in that: described filter element is the single or multiple lift woven wire.
7. the rigid filter dust collector of uniform axial flow speed according to claim 1 is characterized in that: the end face opening of described filter element, opening are towards the exhaust passage, and the exhaust passage connects air outlet, and air outlet connects air exhauster.
8. the rigid filter dust collector of uniform axial flow speed according to claim 7, it is characterized in that: described casing inner top is provided with airduct, airduct connects air compressor, air compressor supply compression clean gas, airduct stretches in the opening of filter element end face, and each end of airduct is horn-like.
9. according to the rigid filter dust collector of each described uniform axial flow speed of claim 1～8, it is characterized in that: described filter element is several, and is arranged in matrix shape or circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010103481A CN101732932A (en) | 2010-01-27 | 2010-01-27 | Rigid filter dust collector with uniform axial flow speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010103481A CN101732932A (en) | 2010-01-27 | 2010-01-27 | Rigid filter dust collector with uniform axial flow speed |
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| CN101732932A true CN101732932A (en) | 2010-06-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979951A (en) * | 2010-11-23 | 2011-02-23 | 北京世纪源博科技有限责任公司 | Dry dedusting and sensible heat recovery system for electric furnace flue gas |
| WO2013086888A1 (en) * | 2011-12-12 | 2013-06-20 | 中联重科股份有限公司 | Dust removing box and dust removing system with same |
| CN106215554A (en) * | 2016-08-03 | 2016-12-14 | 镇江飞利达电站设备有限公司 | Sack cleaner |
| CN111530177A (en) * | 2019-02-06 | 2020-08-14 | 日本斯频德制造株式会社 | Method for replacing filter of dust collecting device, and filter |
-
2010
- 2010-01-27 CN CN201010103481A patent/CN101732932A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979951A (en) * | 2010-11-23 | 2011-02-23 | 北京世纪源博科技有限责任公司 | Dry dedusting and sensible heat recovery system for electric furnace flue gas |
| CN101979951B (en) * | 2010-11-23 | 2012-09-05 | 北京世纪源博科技股份有限公司 | Dry dedusting and sensible heat recovery system for electric furnace flue gas |
| WO2013086888A1 (en) * | 2011-12-12 | 2013-06-20 | 中联重科股份有限公司 | Dust removing box and dust removing system with same |
| CN106215554A (en) * | 2016-08-03 | 2016-12-14 | 镇江飞利达电站设备有限公司 | Sack cleaner |
| CN111530177A (en) * | 2019-02-06 | 2020-08-14 | 日本斯频德制造株式会社 | Method for replacing filter of dust collecting device, and filter |
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Application publication date: 20100616 |