CN210752038U - Industrial waste gas dust removal denitration device for desulfurization - Google Patents
Industrial waste gas dust removal denitration device for desulfurization Download PDFInfo
- Publication number
- CN210752038U CN210752038U CN201921240789.2U CN201921240789U CN210752038U CN 210752038 U CN210752038 U CN 210752038U CN 201921240789 U CN201921240789 U CN 201921240789U CN 210752038 U CN210752038 U CN 210752038U
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- Prior art keywords
- waste gas
- gas
- spraying box
- pipe
- air suction
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- 239000007789 gas Substances 0.000 title claims abstract description 86
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 20
- 230000023556 desulfurization Effects 0.000 title claims abstract description 20
- 239000002440 industrial waste Substances 0.000 title claims abstract description 15
- 239000000428 dust Substances 0.000 title claims description 8
- 239000002912 waste gas Substances 0.000 claims abstract description 100
- 238000005507 spraying Methods 0.000 claims abstract description 75
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 50
- 239000007921 spray Substances 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 25
- 239000012295 chemical reaction liquid Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims 5
- 238000006243 chemical reaction Methods 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001573 beryllium compounds Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a device for dedusting, denitration and desulfurization of industrial waste gas, which comprises a waste gas spraying box and a reactor, wherein the reactor is arranged at one side of the waste gas spraying box, the top end of the waste gas spraying box is provided with a gas transmission port which is communicated with an inner cavity of the waste gas spraying box, and one end of the gas transmission port, which is positioned in the waste gas spraying box, is connected with a waste gas input pipe, the tail end of the waste gas input pipe is arranged at the bottom end of the inner cavity of the waste gas spraying box and has a distance with the bottom end, the inner wall of the waste gas spraying box is provided with a gas suction device and an exhaust device, and the exhaust device is positioned below the gas suction device, the utility model discloses a gas suction device and an exhaust device are arranged in the waste gas spraying box, and the gas suction device and the exhaust device are connected by a circulating air suction pump, so that the time for gas to stay, and the flow of gas in the exhaust gas shower box is increased.
Description
Technical Field
The utility model relates to a waste gas treatment technical field specifically is a device is used in industry waste gas dust removal denitration desulfurization.
Background
The industrial waste gas contains carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxide, chlorine, hydrogen chloride, carbon monoxide, sulfuric acid (fog), lead mercury, beryllium compounds, smoke dust and productive dust, and is discharged into the atmosphere to pollute the air, the substances enter human bodies through respiratory tracts in different ways, some substances directly cause harm and some substances have an accumulation effect to further seriously harm the health of people, wherein the smoke generated by an electric power plant contains substances such as sulfur dioxide and the like, and denitration and desulfurization treatment are needed during discharge.
However, the existing industrial waste gas dedusting, denitration and desulfurization device has the following defects: the existing flue gas desulfurization device mainly uses a spray tower as a main part, the spray tower completes the chemical reaction of acid-base neutralization through the contact time and collision frequency of sulfur dioxide and absorption liquid when carrying out flue gas desulfurization, and sulfur dioxide stays in a waste gas spray box for as much time as possible, but in the existing flue gas desulfurization process, the retention time of sulfur dioxide cannot be ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device is used in industry waste gas dust removal denitration desulfurization to solve current flue gas desulfurization device in the above-mentioned background art and mainly use the spray column as the main, the spray column is when carrying out flue gas desulfurization and is accomplished the chemical reaction of acid-base neutralization through the contact time and the collision frequency of sulfur dioxide and absorption liquid, but need sulfur dioxide as much as possible time stop in the exhaust gas spray tank, but current flue gas desulfurization in-process, can't guarantee the problem of sulfur dioxide's dwell time.
In order to achieve the above object, the utility model provides a following technical scheme: a device for dedusting, denitration and desulfurization of industrial waste gas comprises a waste gas spraying box and a reactor, wherein the reactor is arranged on one side of the waste gas spraying box, the top end of the waste gas spraying box is provided with a gas transmission port which is communicated with the inner cavity of the waste gas spraying box, one end of the gas transmission port, which is positioned in the waste gas spraying box, is connected with a waste gas input pipe, the tail end of the waste gas input pipe is arranged at the bottom end of the inner cavity of the waste gas spraying box and is away from the bottom end, the inner wall of the waste gas spraying box is provided with a gas suction device and an exhaust device, the exhaust device is positioned below the gas suction device, the gas suction device is close to the bottom end of the waste gas spraying box, the gas suction device and the exhaust device are communicated through a circulating pipe, a circulating air pump is arranged on the circulating pipe, an exhaust port, the waste gas spraying box is internally provided with a spraying pipe, the spraying pipe is provided with a plurality of groups of spraying heads, and the spraying pipe is communicated with a reaction liquid inlet.
Preferably, the air suction device comprises an air suction cavity and an air suction pipe, the air suction pipe is annularly arranged on the inner wall of the waste gas spraying box, air suction ports are formed in the air suction pipe, a plurality of groups of air suction ports are formed in each air suction pipe, a separation net used for filtering gas is installed on each air suction port, the air suction cavity is formed in the outer wall of the waste gas spraying box, and the gas in the waste gas spraying box is sucked into the air suction cavity.
Preferably, exhaust apparatus includes air feeding chamber and blast pipe, the blast pipe encircles and is established at waste gas spray incasement wall, and has seted up the gas vent on the blast pipe, the gas vent has seted up the multiunit, and the gas vent installs and separate the net, air feeding chamber sets up at waste gas spray incasement wall to and air feeding chamber is located the chamber below of breathing in, and air feeding chamber and blast pipe are discharged the inspiratory gas of getter device into waste gas spray case.
Preferably, it mainly includes detection case, C type back flow and solenoid valve to detect circulating device, waste gas sprays the gas vent of case is connected to the one end of C type back flow, the other end intercommunication waste gas of C type back flow spray the incasement chamber and with waste gas spray install solenoid valve between the case, the detection case is installed on C type back flow, C type back flow also is equipped with solenoid valve with duct connections's position, and solenoid valve is located the low reaches of detection case, guarantees that waste gas sprays the case combustion gas sulfur dioxide content qualified.
Preferably, the electromagnetic valve is electrically connected with an air release timer, and the air release timer is used for controlling the opening and closing of the electromagnetic valve.
Preferably, a sulfur dioxide detector is arranged in the detection box, the sulfur dioxide detector is electrically connected with a power supply of the electromagnetic valve, and the sulfur dioxide detector controls the on-off of the electromagnetic valve.
The utility model provides a device is used in industrial waste gas dust removal denitration desulfurization possesses following beneficial effect:
(1) the utility model discloses a set up getter device and exhaust apparatus in waste gas sprays the incasement, and utilize the ejector cycle pump to connect between getter device and the exhaust apparatus, during the use, the ejector cycle pump during operation, the ejector cycle pump utilizes the breathing pipe in the getter device to spray the incasement with waste gas and siphons away through the waste gas after spraying, then waste gas sprays the case is discharged to rethread exhaust apparatus's blast pipe, increase gaseous stop in waste gas spray the time of case, be convenient for better and spray liquid and carry out chemical reaction, and increased the gaseous flow of waste gas spray incasement.
(2) The utility model discloses an utilize and detect circulating device to spray the waste gas case and be connected with the reactor, spray the case through waste gas and spray reaction back gas and enter into C type back flow from the gas vent in, then flow through the detection case of C type back flow, when sulfur dioxide detector in the detection case detects gaseous in sulfur dioxide content nonconforming, make and close the solenoid valve on the conveyer pipe, gas gets back to the waste gas along C type back flow this moment and sprays the case continuation reaction, detect qualified back, close the solenoid valve on the C type back flow, make gas follow the conveyer pipe and enter into the reactor and continue the reaction, be convenient for guarantee the desulfurization rate that waste gas sprayed the case.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the waste gas spraying box of the present invention;
fig. 3 is a schematic structural view of the detection circulation device of the present invention.
In the figure: 1. a waste gas spray tank; 2. a suction device; 3. a circulating air pump; 4. a circulation pipe; 5. an exhaust device; 6. detecting a circulating device; 7. an electromagnetic valve; 8. a reactor; 9. a delivery pipe; 10. an air release timer; 11. a gas transmission port; 12. a reaction liquid inlet; 13. a detection box; 14. an air suction cavity; 15. an air delivery cavity; 16. a C-shaped return pipe; 17. separating the net; 18. an exhaust gas input pipe; 19. a shower pipe; 20. a sulfur dioxide detector; 21. an air intake duct; 22. and (4) exhausting the gas.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1-3, the utility model provides a technical solution: a device for dedusting, denitration and desulfurization of industrial waste gas comprises a waste gas spraying box 1 and a reactor 8, wherein the reactor 8 is arranged on one side of the waste gas spraying box 1, a gas transmission port 11 is arranged at the top end of the waste gas spraying box 1, the gas transmission port 11 is communicated with an inner cavity of the waste gas spraying box 1, one end of the gas transmission port 11, which is positioned in the waste gas spraying box 1, is connected with a waste gas input pipe 18, the tail end of the waste gas input pipe 18 is arranged at the bottom end of the inner cavity of the waste gas spraying box 1 and has a distance with the bottom end, the inner wall of the waste gas spraying box 1 is provided with a gas suction device 2 and an exhaust device 5, the exhaust device 5 is positioned below the gas suction device 2, the gas suction device 2 is close to the bottom end of the waste gas spraying box 1, the gas suction device 2 is communicated with the exhaust device 5 through a circulating pipe 4, a circulating, and the detection circulating device 6 is communicated with the waste gas spraying box 1 through a conveying pipe 9, a spraying pipe 19 is arranged in the waste gas spraying box 1, a plurality of groups of spraying heads are arranged on the spraying pipe 19, and a reaction liquid inlet 12 is communicated with the spraying pipe 19.
The air suction device 2 comprises an air suction cavity 14 and an air suction pipe 21, the air suction pipe 21 is annularly arranged on the inner wall of the waste gas spraying box 1, the air suction pipe 21 is provided with a plurality of groups of air suction ports, the air suction pipe 21 is positioned on the air suction ports and provided with a separation net 17 for filtering gas, the air suction cavity 14 is arranged on the outer wall of the waste gas spraying box 1, and the air suction device 2 generates suction force to suck the gas in the waste gas spraying box 1 into the air suction cavity 14 under the action of the circulating air suction pump 3; the exhaust device 5 comprises an air supply cavity 15 and an exhaust pipe 22, the exhaust pipe 22 is annularly arranged on the inner wall of the waste gas spraying box 1, the exhaust pipe 22 is provided with exhaust ports, the exhaust ports are provided with a plurality of groups, the exhaust ports are provided with separating nets 17, the air supply cavity 15 is arranged on the outer wall of the waste gas spraying box 1, the air supply cavity 15 is positioned below the air suction cavity 14, air sucked by the air suction device 2 enters the air supply cavity 15 and then enters the exhaust pipe 22 from the air supply cavity 15, and the exhaust port on the exhaust pipe 22 discharges the air into the waste gas spraying box 1 again; the detection circulating device 6 mainly comprises a detection box 13, a C-shaped return pipe 16 and an electromagnetic valve 7, wherein one end of the C-shaped return pipe 16 is connected with an exhaust port of the waste gas spraying box 1, the other end of the C-shaped return pipe 16 is communicated with an inner cavity of the waste gas spraying box 1, the electromagnetic valve 7 is arranged between the other end of the C-shaped return pipe 16 and the waste gas spraying box 1, the detection box 13 is arranged on the C-shaped return pipe 16, the electromagnetic valve 7 is also arranged at the position where the C-shaped return pipe 16 is connected with the conveying pipe 9, the electromagnetic valve 7 is positioned at the downstream of the detection box 13, when the sulfur dioxide detector 20 detects that the sulfur dioxide content in the processed gas is unqualified, the electromagnetic valve 7 on the conveying pipe 9 is closed, the electromagnetic valve 7 on the C-shaped return pipe 16 is opened, the gas returns to the waste, closing the electromagnetic valve 7 on the C-shaped return pipe 16, so that the gas enters the reactor 8 from the delivery pipe 9 for reaction; the electromagnetic valve 7 is electrically connected with a gas release timer 10, the gas release timer 10 can set time except for controlling the on-off of the electromagnetic valve 7 by using a sulfur dioxide detector 20, and the electromagnetic valve 7 is opened after the set time is up, so that gas flows into the reactor 8; be equipped with sulfur dioxide detector 20 in the detection case 13, and sulfur dioxide detector 20 and solenoid valve 7's power electric connection, in gaseous entering into detection case 13, sulfur dioxide detector 20 detected gaseous, controlled solenoid valve 7 big power according to the testing result to control solenoid valve 7 open and close.
It should be noted that, in operation, the industrial waste gas dedusting, denitration and desulfurization device, when the device is in use, the waste gas enters the waste gas input pipe 18 from the gas transmission port 11, flows out from the outlet of the waste gas input pipe 18 near the bottom end of the waste gas spraying box 1, enters the waste gas spraying box 1, is sprayed and reacts with the spraying liquid, wherein the waste gas spraying box 1 is provided with the gas suction device 2 and the exhaust device 5, the circulating air suction pump 3 is started, the gas suction pipe 21 of the gas suction device 2 sucks the gas in the waste gas spraying box 1 into the gas suction device 2 and conveys the gas into the exhaust device 5 through the circulating air suction pump 3, and the gas is exhausted from the exhaust pipe 22 of the exhaust device 5. Reenter the waste gas spraying box 1 to continue reaction, thereby increasing the time for the gas to stay in the waste gas spraying box 1, facilitating better chemical reaction with the spraying liquid, increasing the flow of the gas in the waste gas spraying box, leading the gas treated by the waste gas spraying box 1 to enter the C-shaped return pipe 16 of the detection circulating device 6 through the exhaust port and then to flow through the detection box 13 of the C-shaped return pipe 16, closing the electromagnetic valve 7 on the delivery pipe 9, opening the electromagnetic valve 7 on the C-shaped return pipe 16 when the sulfur dioxide detector 20 in the detection box 13 detects that the sulfur dioxide content in the treated gas is unqualified, forming a loop through the C-shaped return pipe 16, leading the gas to return to the waste gas spraying box 1 along the C-shaped return pipe 16 to continue reaction, opening the electromagnetic valve 7 on the delivery pipe 9 after the detection is qualified, closing the electromagnetic valve 7 on the C-shaped return pipe 16, so that the gas enters the reactor 8 from the delivery pipe 9 for reaction, the desulfurization rate of the waste gas spraying box is convenient to ensure by utilizing the detection circulating device 6, and the sulfur dioxide detector 20 adopts PGM-1130 type products.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an industrial waste gas removes dust denitration device for desulfurization, includes that waste gas sprays case (1) and reactor (8), reactor (8) set up and spray case (1) one side, its characterized in that at waste gas: the top end of the waste gas spraying box (1) is provided with a gas transmission port (11), the gas transmission port (11) is communicated with the inner cavity of the waste gas spraying box (1), one end of the gas transmission port (11) positioned in the waste gas spraying box (1) is connected with a waste gas input pipe (18), the tail end of the waste gas input pipe (18) is arranged at the bottom end of the inner cavity of the waste gas spraying box (1) and has a distance with the bottom end, the inner wall of the waste gas spraying box (1) is provided with a gas suction device (2) and an exhaust device (5), the exhaust device (5) is positioned below the gas suction device (2), the gas suction device (2) is close to the bottom end of the waste gas spraying box (1), the gas suction device (2) is communicated with the exhaust device (5) through a circulating pipe (4), a circulating air suction pump (3) is installed on the circulating pipe (4), an exhaust port of the reactor (, and the detection circulating device (6) is communicated with the waste gas spraying box (1) through the conveying pipe (9), a spraying pipe (19) is arranged in the waste gas spraying box (1), a plurality of groups of spraying heads are arranged on the spraying pipe (19), and a reaction liquid inlet (12) is communicated with the spraying pipe (19).
2. The device for dedusting, denitrating and desulfurizing industrial waste gas according to claim 1, characterized in that: the air suction device (2) comprises an air suction cavity (14) and air suction pipes (21), the air suction pipes (21) are arranged on the inner wall of the waste gas spraying box (1) in a surrounding mode, air suction ports are formed in the air suction pipes (21), multiple groups of air suction ports are arranged on the air suction ports, the air suction pipes (21) are located on the air suction ports and are provided with separation nets (17) used for filtering gas, and the air suction cavity (14) is arranged on the outer wall of the waste gas spraying box (1).
3. The device for dedusting, denitrating and desulfurizing industrial waste gas according to claim 1, characterized in that: exhaust apparatus (5) are including air cavity (15) and blast pipe (22), blast pipe (22) encircle establish at waste gas spray case (1) inner wall, and seted up the gas vent on blast pipe (22), the multiunit has been seted up to the gas vent, and the gas vent installs and separate net (17), air cavity (15) set up at waste gas spray case (1) outer wall to and air cavity (15) are located air cavity (14) below of breathing in.
4. The device for dedusting, denitrating and desulfurizing industrial waste gas according to claim 1, characterized in that: detect circulating device (6) and mainly include detection case (13), C type back flow (16) and solenoid valve (7), the gas vent that waste gas sprayed case (1) is connected to the one end of C type back flow (16), the other end intercommunication waste gas of C type back flow (16) spray case (1) inner chamber and with waste gas spray install solenoid valve (7) between case (1), install on C type back flow (16) detection case (13), the position that C type back flow (16) and conveyer pipe (9) are connected also is equipped with solenoid valve (7), and solenoid valve (7) are located the low reaches of detection case (13).
5. The device for dedusting, denitrating and desulfurizing industrial waste gas according to claim 4, characterized in that: the electromagnetic valve (7) is electrically connected with an air release timer (10).
6. The device for dedusting, denitrating and desulfurizing industrial waste gas according to claim 4, characterized in that: and a sulfur dioxide detector (20) is arranged in the detection box (13), and the sulfur dioxide detector (20) is electrically connected with a power supply of the electromagnetic valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921240789.2U CN210752038U (en) | 2019-08-02 | 2019-08-02 | Industrial waste gas dust removal denitration device for desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921240789.2U CN210752038U (en) | 2019-08-02 | 2019-08-02 | Industrial waste gas dust removal denitration device for desulfurization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210752038U true CN210752038U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921240789.2U Expired - Fee Related CN210752038U (en) | 2019-08-02 | 2019-08-02 | Industrial waste gas dust removal denitration device for desulfurization |
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| Country | Link |
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| CN (1) | CN210752038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370965A (en) * | 2020-10-28 | 2021-02-19 | 西安建筑科技大学 | Tail gas treatment system for lost foam process |
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2019
- 2019-08-02 CN CN201921240789.2U patent/CN210752038U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112370965A (en) * | 2020-10-28 | 2021-02-19 | 西安建筑科技大学 | Tail gas treatment system for lost foam process |
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