CN110354656A - A kind of sulfur-containing flue gas purifying bubbling absorber - Google Patents
A kind of sulfur-containing flue gas purifying bubbling absorber Download PDFInfo
- Publication number
- CN110354656A CN110354656A CN201910657795.6A CN201910657795A CN110354656A CN 110354656 A CN110354656 A CN 110354656A CN 201910657795 A CN201910657795 A CN 201910657795A CN 110354656 A CN110354656 A CN 110354656A
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- Prior art keywords
- flue gas
- absorption tower
- arc tube
- sieve plate
- pipe
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The present invention relates to flue gases purification fields, and disclose a kind of sulfur-containing flue gas purifying bubbling absorber, including absorption tower, air inlet pipe, inlet tube, sieve plate, absorbent, sewage pipe, escape pipe, air inlet pipe is mounted on absorption tower, inlet tube is mounted on the outside on absorption tower, sieve plate is mounted on the inside on absorption tower, absorbent is filled on sieve plate, sewage pipe is mounted on absorption tower, escape pipe is located at the top on absorption tower, and inlet tube, absorbent, sieve plate, air inlet pipe, sewage pipe arrange from top to bottom.So that when absorbent and smoke reaction, internal ammonia is reacted with other harmful substances in flue gas, so that ammonia absorbs in the state of being in liquefaction, the moisture that flue gas is gradually increasing uniformly through sieve plate, while being generated generates vapor by sulfur dioxide heat release, and vapor remixes in flue gas, remove the electrostatic of solid particle in smoke removing, enable particulate matter rapid subsidence in absorber bottom, increase the cleanliness of sieve plate, convenient for the rapid increase of gas.
Description
Technical field
The present invention relates to flue gases purification field, specially a kind of sulfur-containing flue gas purifying bubbling absorber.
Background technique
The main reason for flue gas is the mixture of gas and flue dust, is pollution residential block atmosphere, the ingredient of flue gas is very complicated,
It include that water vapour, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbon and nitrogen oxidation are closed in gas
Object etc., flue dust include the ash content of fuel, coal grain, oil droplet and high-temperature split product etc..
After coke-stove gas or PETROLEUM PROCESSING, a large amount of sulfur-containing smoke gas are discharged from flue, existing sulfur-containing flue gas purifying is used
Shown in bubbling absorber working principle Fig. 6, flue gas enters from air inlet pipe, and then inlet tube oozes in absorbing liquid to sieve plate, sieve
Absorbing liquid is accumulated on plate, when by sieve plate, harmful substance reacts flue gas with absorbent, removes flue gas harmful substance, most
Whole purification gas is discharged by exhaust pipe, and flue gas is in purification, since absorbing liquid is mostly ammonia nitrogen absorbing liquid, when ammonia nitrogen absorbing liquid
Low temperature sulfur-containing smoke gas is met when being still on sieve plate, along with a large amount of solid particles are contained in flue dust, absorbing liquid is mixed with flue dust
Together, it causes ammonia and sulfur dioxide inside absorbing liquid to react and generates sulphur ammonium crystallization, sulphur ammonium crystallisation adsorption is in sieve plate
On, cause the gap on sieve plate to block, flue gas can not continue up rise, and flue gas outside absorber is caused to cannot be introduced into, internal
Pressure is gradually increased, and is influenced the normal use of absorber, is caused absorbent to crack when serious, and the purification of flue gas, and cigarette are unfavorable for
Gas is influenced in purification process by absorbent, and the flue gas rate of climb is slower, and flue gas is caused all to be deposited in absorber bottom
Portion, absorber purifying smoke inefficiency.
Summary of the invention
For the deficiency of above-mentioned background technique, the present invention provides a kind of sulfur-containing flue gas purifying bubbling absorber, tools
The advantage that standby gas cleaning is smooth, the flue gas rate of climb is uniform, solves the problems, such as background technique proposition.
The invention provides the following technical scheme: a kind of sulfur-containing flue gas purifying bubbling absorber, including absorption tower, air inlet
Pipe, inlet tube, sieve plate, absorbent, sewage pipe, escape pipe, air inlet pipe are mounted on absorption tower, and inlet tube is mounted on absorption tower
Outside, sieve plate are mounted on the inside on absorption tower, and absorbent is filled on sieve plate, and sewage pipe is mounted on absorption tower, and escape pipe is set
At the top on absorption tower, inlet tube, absorbent, sieve plate, air inlet pipe, sewage pipe arrange from top to bottom, the inside of the air inlet pipe
Arc tube is installed, the quantity of the arc tube is two, and two arc tubes are each provided in air inlet pipe, on the arc tube
Bottom plate is installed, filler is filled in the arc tube, the absorbent, arc tube, filler and bottom plate are constituted at flue gas
Device is managed, inserted link is installed on the bottom plate, leather sheath is installed, the end of the inserted link is run through and extended in the arc tube
The outside of leather sheath.
Preferably, the shape of the arc tube is arc, and the arc tube is hollow form, is offered on the arc tube logical
Hole, for the through-hole annular array on arc tube, two arc tubes form conical pipe.
Preferably, deck is installed in the arc tube, support rod is installed on the deck, the quantity of the deck is
Two, the other end of the support rod is connect with another deck, and the deck is equipped with support tube, screw thread on the support tube
It is set with sliding sleeve, the sliding sleeve is divided into two parts, and positioning seat is equipped on the sliding sleeve, and it is fixed to be movably installed in the positioning seat
Position bar, is equipped with sliding panel in the locating rod, air hole, the positioning seat, locating rod, sliding is offered on the sliding panel
The quantity of plate is two groups, and positioning seat described in another group, locating rod, sliding panel are mounted on arc tube.
The present invention have it is following the utility model has the advantages that
1, sulfur-containing flue gas purifying bubbling absorber, by the cooperation of arc tube and filler, so that sulfur-containing smoke gas
When entering absorption tower by air inlet pipe, directly it is filled object neutralization and reacts and generate vulcanized sodium and water, so that in flue gas
Sulfur dioxide removal, so that internal ammonia is reacted with other harmful substances in flue gas, so that ammonia when absorbent and smoke reaction
Gas absorbs in the state of being in liquefaction, and flue gas is gradually increasing uniformly through sieve plate, while the moisture generated is by titanium dioxide
Sulphur heat release generates vapor, and vapor remixes in flue gas, removes the electrostatic of solid particle in smoke removing, enables particulate matter fast
Speed is deposited in absorber bottom, increases the cleanliness of sieve plate, convenient for the rapid increase of gas.
2, the sulfur-containing flue gas purifying bubbling absorber increases arc tube by the mutual cooperation of rubber sleeve and bottom plate
Stability during installation, so that arc tube keeps vertical state to be mounted on inside air inlet pipe, so that flue gas is protected in circulation
Certain fluency is held, while reducing resistance of the flue gas in circulation to reduce using the effect of support tube and sliding sleeve convenient for function
Arc tube be taken out, the filler more renewed, so that the function of arc tube is constantly in relatively steady state, so that cigarette
The efficiency of gas purification increases, and slows down the blocking of sieve plate, further increases fluency of the flue gas in circulation.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural schematic diagram of arc tube；
Fig. 3 is the schematic diagram of internal structure of arc tube；
Fig. 4 is the schematic cross-sectional view of arc tube；
Fig. 5 is the side structure schematic view of arc tube；
Fig. 6 is existing structure schematic diagram.
In figure: 1, absorption tower；2, air inlet pipe；3, inlet tube；4, sieve plate；5, absorbent；6, sewage pipe；7, escape pipe；8,
Arc tube；9, bottom plate；10, rubber sleeve；11, through-hole；12, inserted link；13, leather sheath；14, deck；15, support rod；16, support tube；
17, sliding sleeve；18, positioning seat；19, locating rod；20, sliding panel；21, air hole；22, filler.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-5, a kind of sulfur-containing flue gas purifying bubbling absorber, including absorption tower 1, air inlet pipe 2, inlet tube
3, sieve plate 4, absorbent 5, sewage pipe 6, escape pipe 7, air inlet pipe 2 are mounted on absorption tower 1, and inlet tube 3 is mounted on absorption tower 1
Outside, sieve plate 4 are mounted on the inside on absorption tower 1, and absorbent 5 is filled on sieve plate 4, and sewage pipe 6 is mounted on absorption tower 1, out
Tracheae 7 is located at the top on absorption tower 1, and inlet tube 3, absorbent 5, sieve plate 4, air inlet pipe 2, sewage pipe 6 arrange from top to bottom, described
The inside of air inlet pipe 2 is equipped with arc tube 8, and the quantity of the arc tube 8 is two.The conical pipe of two arc tubes 8 composition, it is right
The caliber at end is adapted with the inner wall of 2 caliber of air inlet pipe, so that arc tube 8 and the tube wall of air inlet pipe 2 are in close contact, increases arc
The leakproofness of cylinder 8, so that flue gas must be flowed out from arc tube 8, two arc tubes 8 are each provided in air inlet pipe 2, the arc
Bottom plate 9 is installed, the shape of bottom plate 9 and the side view of arc tube 8 match, so that bottom plate 9 is just mounted on arc on shape cylinder 8
The side of shape cylinder 8, and the middle vacancy of arc tube 8 is blocked, so that filler 22 can not be dropped out in inside, in the arc tube 8
Filled with filler 22, filler 22 is sodium hydroxide, sodium hydroxide be 2 times of sodium hydroxides reacted with sulfur dioxide generation water and
Vulcanized sodium, so that the sulfur dioxide in flue gas is taken out, so that the ammoniacal liquor inside absorbent 5 is in liquefaction always and will not occur
Crystallization phenomenon is shut out so that sieve plate 4 is raised above convenient for flue gas always in ventilative state, slows down the chocking-up degree of sieve plate 4
There is completely plugged phenomenon in exhausted sieve plate 4, and the water that simultaneous reactions generate generates vapor by high temperature evaporation, and vapor remixes
In flue gas, the electrostatic of particulate matter in flue gas is taken out, increases the removal of flue gas particles, prevents particulate matter from bringing sieve plate by flue gas
4 inside, causes particulate matter to block sieve plate 4, and sieve plate 4 can not provide channel again for flue gas, cause flue gas that can not rise whole heaps
Product can not be discharged in the bottom on absorption tower 1, influence the purification efficiency of flue gas, increase the maintenance cost on absorption tower 1, the absorption
Agent 5, arc tube 8, filler 22 and bottom plate 9 constitute flue gas processing device, are directly cleaned when flue gas passes through, and are convenient for absorbent
5 sufficiently react with flue gas, and inserted link 12 is equipped on the bottom plate 9, and leather sheath 13 is equipped in the arc tube 8, increase bottom
The stability of plate 9 during installation prevents 9 stress of bottom plate from falling off, and the end of the inserted link 12 is run through and extends to the outer of leather sheath 13
Portion.
Wherein, the shape of the arc tube 8 is arc, and the arc tube 8 is hollow form, is offered on the arc tube 8
Through-hole 11,11 annular array of through-hole is on arc tube 8, and two arc tubes 8 form conical pipe, convenient for the stream of flue gas
Logical, reducing smoke makes resistance when contacting arc tube 8 in circulation, while being convenient for the filling of filler 22 so that filler 22 with
Flue gas comes into full contact with, and the sulfur dioxide in flue gas is removed, and increases stability of the absorbent in reaction, while increasing smog
Fluency when circulating sieve plate 4.
Wherein, deck 14 is installed in the arc tube 8, support rod 15, the deck 14 are installed on the deck 14
Quantity be two, the other end of the support rod 15 is connect with another deck 14, and the deck 14 is equipped with support tube 16,
Thread bush is equipped with sliding sleeve 17 on the support tube 16, and the sliding sleeve 17 divides for two parts, and two parts of sliding sleeve 17 are rotation socket,
With 16 junction of support tube be is threadedly coupled, be connected as being rotatablely connected with the outer wall of sliding sleeve 17, when sliding sleeve 17 when rotated, inside
Rotation, outside do not turn, so that positioning seat 18 is in stable state when moving, positioning seat 18 are avoided to rotate with internal sliding sleeve 17
And rotate, positioning seat 18 is installed, positioning seat 18 is equivalent to two plates, is rotatablely connected between two plates on the sliding sleeve 17
There is locating rod 19, allows locating rod 19 to rotate different angles, locating rod 19, institute are movably installed in the positioning seat 18
It states and sliding panel 20 is installed in locating rod 19, the effect of sliding panel 20 will drive sliding panel when being exactly that sliding sleeve 17 internally slides
20 are gradually opened angle, strut arc tube 8 convenient for sliding panel 20, so that arc tube 8 opens outward, gravity are avoided to influence, made
Camber cylinder 8 is closed, and influences the conveying of flue gas, air hole 21, the positioning seat 18, locating rod are offered on the sliding panel 20
19, the quantity of sliding panel 20 is two groups, and positioning seat 18, locating rod 19 described in another group, sliding panel 20 are mounted on arc tube 8
On, resistance of the reducing smoke in circulation increases fluency when flue gas circulation.
Working principle, sulfur-containing smoke gas enter the inside on absorption tower 1 by air inlet pipe 2, and flue gas is entering 1 inside of absorption tower
Before, arc tube 8 is first passed through, the sulfur dioxide in flue gas is chemically reacted with filler 22, so that vulcanized sodium and water are generated, sulphur
Change the inside that sodium remains in arc tube 8, then flue gas passes through the inside that through-hole 11 flows into absorption tower 1 again, and inlet tube 3 flows out at this time
Absorbent 5 is flowed through to sieve plate 4, and flue gas reacts using when sieve plate 4 with absorbent 5, and absorbent 5 absorbs having in flue gas
Substance is done harm to, the flue gas after final purification is discharged by escape pipe 7.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of sulfur-containing flue gas purifying bubbling absorber, including absorption tower (1), air inlet pipe (2), inlet tube (3), sieve plate
(4), absorbent (5), sewage pipe (6), escape pipe (7), air inlet pipe (2) are mounted on absorption tower (1), and inlet tube (3) is mounted on
The outside on absorption tower (1), sieve plate (4) are mounted on the inside of absorption tower (1), and absorbent (5) is filled on sieve plate (4), sewage pipe
(6) it is mounted on absorption tower (1), escape pipe (7) is located at the top of absorption tower (1), inlet tube (3), absorbent (5), sieve plate
(4), air inlet pipe (2), sewage pipe (6) arrange from top to bottom, it is characterised in that: the inside of the air inlet pipe (2) is equipped with arc
Cylinder (8), the quantity of the arc tube (8) are two, and two arc tubes (8) are each provided in air inlet pipe (2), the arc tube
(8) it is equipped on bottom plate (9), is filled with filler (22) in the arc tube (8), the absorbent (5), is filled out arc tube (8)
It fills object (22) and bottom plate (9) and constitutes flue gas processing device, be equipped with inserted link (12) on the bottom plate (9), in the arc tube (8)
It is equipped with leather sheath (13), the end of the inserted link (12) is run through and extends to the outside of leather sheath (13).
2. a kind of sulfur-containing flue gas purifying bubbling absorber according to claim 1, it is characterised in that: the arc tube
(8) shape is arc, and the arc tube (8) is hollow form, offers through-hole (11), the through-hole on the arc tube (8)
(11) for annular array on arc tube (8), two arc tubes (8) form conical pipe.
3. a kind of sulfur-containing flue gas purifying bubbling absorber according to claim 1, it is characterised in that: the arc tube
(8) it being equipped with deck (14) in, is equipped with support rod (15) on the deck (14), the quantity of the deck (14) is two,
The other end of the support rod (15) is connect with another deck (14), and the deck (14) is equipped with support tube (16), described
Thread bush is equipped with sliding sleeve (17) on support tube (16), and the sliding sleeve (17) is divided into two parts, and it is fixed to be equipped on the sliding sleeve (17)
Position seat (18), the positioning seat (18) is interior to be movably installed with locating rod (19), is equipped with sliding panel on the locating rod (19)
(20), it is offered air hole (21) on the sliding panel (20), the positioning seat (18), locating rod (19), sliding panel (20)
Quantity is two groups, and positioning seat described in another group (18), locating rod (19), sliding panel (20) are mounted on arc tube (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910657795.6A CN110354656B (en) | 2019-07-20 | 2019-07-20 | Bubbling absorber for purifying sulfur-containing flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910657795.6A CN110354656B (en) | 2019-07-20 | 2019-07-20 | Bubbling absorber for purifying sulfur-containing flue gas |
Publications (2)
| Publication Number | Publication Date |
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| CN110354656A true CN110354656A (en) | 2019-10-22 |
| CN110354656B CN110354656B (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910657795.6A Active CN110354656B (en) | 2019-07-20 | 2019-07-20 | Bubbling absorber for purifying sulfur-containing flue gas |
Country Status (1)
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| CN102240486A (en) * | 2010-05-12 | 2011-11-16 | 贵阳铝镁设计研究院有限公司 | Method and apparatus for prededusting |
| CN104324587A (en) * | 2014-09-26 | 2015-02-04 | 常州友达环保科技有限公司 | Thin-hole sieve-plate-typed bubble column |
| CN204365104U (en) * | 2014-12-31 | 2015-06-03 | 新疆海天祥瑞环保工程有限公司 | A kind of chimney flue type pernicious gas filter plant |
| CN104859135A (en) * | 2015-06-04 | 2015-08-26 | 周茂振 | Conical winding forming mould as well as forming equipment and process of conical tank or barrel |
| US20170007960A1 (en) * | 2015-07-06 | 2017-01-12 | Takeshi Kimura | Fillers for treating flue-gas and apparatus for treating flue-gas filled with the fillers |
| CN106621635A (en) * | 2017-01-24 | 2017-05-10 | 摩瑞尔电器（昆山）有限公司 | Flue gas purification device |
| CN206566592U (en) * | 2017-03-23 | 2017-10-20 | 成都拿盛科技有限公司 | A kind of closed filter plant of high efficiency plate |
| KR20190014315A (en) * | 2017-08-02 | 2019-02-12 | (주)비단생 | Loess kiln structure combined with oven and coffee roasting |
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2019
- 2019-07-20 CN CN201910657795.6A patent/CN110354656B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201376755Y (en) * | 2009-04-13 | 2010-01-06 | 李林斌 | Auxiliary blanking device of mechanical type powder material |
| CN101797466A (en) * | 2009-10-14 | 2010-08-11 | 中国科学院过程工程研究所 | Wet flue gas desulphurizing method utilizing carbide slag slurry and device thereof |
| CN102240486A (en) * | 2010-05-12 | 2011-11-16 | 贵阳铝镁设计研究院有限公司 | Method and apparatus for prededusting |
| CN104324587A (en) * | 2014-09-26 | 2015-02-04 | 常州友达环保科技有限公司 | Thin-hole sieve-plate-typed bubble column |
| CN204365104U (en) * | 2014-12-31 | 2015-06-03 | 新疆海天祥瑞环保工程有限公司 | A kind of chimney flue type pernicious gas filter plant |
| CN104859135A (en) * | 2015-06-04 | 2015-08-26 | 周茂振 | Conical winding forming mould as well as forming equipment and process of conical tank or barrel |
| US20170007960A1 (en) * | 2015-07-06 | 2017-01-12 | Takeshi Kimura | Fillers for treating flue-gas and apparatus for treating flue-gas filled with the fillers |
| CN106621635A (en) * | 2017-01-24 | 2017-05-10 | 摩瑞尔电器（昆山）有限公司 | Flue gas purification device |
| CN206566592U (en) * | 2017-03-23 | 2017-10-20 | 成都拿盛科技有限公司 | A kind of closed filter plant of high efficiency plate |
| KR20190014315A (en) * | 2017-08-02 | 2019-02-12 | (주)비단생 | Loess kiln structure combined with oven and coffee roasting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110354656B (en) | 2021-12-07 |
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