CN114377534A - Acid-base waste gas treatment spray tower - Google Patents
Acid-base waste gas treatment spray tower Download PDFInfo
- Publication number
- CN114377534A CN114377534A CN202011107829.3A CN202011107829A CN114377534A CN 114377534 A CN114377534 A CN 114377534A CN 202011107829 A CN202011107829 A CN 202011107829A CN 114377534 A CN114377534 A CN 114377534A
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- CN
- China
- Prior art keywords
- spray tower
- waste gas
- acid
- filter layer
- fixedly connected
- 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.)
- Pending
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- 239000007921 spray Substances 0.000 title claims abstract description 88
- 239000002912 waste gas Substances 0.000 title claims abstract description 49
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 16
- 239000003513 alkali Substances 0.000 claims description 15
- 239000002585 base Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 238000000746 purification Methods 0.000 abstract description 19
- 239000007795 chemical reaction product Substances 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 230000010405 clearance mechanism Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000006386 neutralization reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
Images
Classifications
-
- 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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- 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
- B01D53/38—Removing components of undefined structure
- B01D53/42—Basic components
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an acid-base waste gas treatment spray tower, and particularly relates to the field of spray towers. According to the scheme, the first spray tower, the neutralizing mechanism and the second spray tower are matched with each other, so that the waste gas is purified by the first spray tower and the second spray tower, the retention time of the waste gas is prolonged, and the purification degree of the waste gas is improved; and through the mutual cooperation of fixed dog and filtering baffle for the impurity that produces can be collected through filtering baffle among the exhaust purification process, and rethread clearance brush is cleaned, has realized the collection processing to reaction product, has improved purification efficiency.
Description
Technical Field
The invention relates to the technical field of spray towers, in particular to an acid-base waste gas treatment spray tower.
Background
In the process of industrial production, a large amount of harmful gases are often generated, wherein the content of acid and alkali waste gases is the highest, the waste gases generated in the industrial production enter the spraying tower through the bottom of the spraying tower, and corresponding atomized neutralizing liquid is sprayed out through the spray head to perform a neutralization reaction, so that the acid and alkali waste gases are neutralized and treated, and the effective evolution of the waste gases is realized.
However, the existing devices still have some problems in the processes of exhaust gas purification and reaction product collection, such as:
firstly, in the existing waste gas treatment process, the contact time of waste gas and a neutralization reactant is short, the purification treatment is insufficient, and the thorough purification of the waste gas cannot be realized;
secondly, the waste gas treatment mode is usually the purification treatment through neutralization reaction, and the products generated by the reaction are not collected and can influence the continuous progress of the reaction.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide an acid-base waste gas treatment spray tower to solve the problems that waste gas is difficult to sufficiently treat and reaction products are difficult to clean in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: an acid-base waste gas treatment spray tower comprises a first spray tower, wherein a waste gas inlet is fixedly connected to the side end of the first spray tower, a cleaning mechanism is slidably mounted at the side end of the first spray tower, a waste gas pipeline is fixedly connected to the top end of the first spray tower, a neutralizing mechanism is placed at the side end of the first spray tower, a suction fan is fixedly connected to the side end of the waste gas pipeline, a vent pipeline is fixedly connected to the other end of the suction fan, a second spray tower is fixedly connected to the side end of the vent pipeline, and the cleaning mechanism is located at the side end of the second spray tower;
the cleaning mechanism comprises a fixed stop block, sealing layers are fixedly mounted at two ends of the top end of the fixed stop block, the top end of each sealing layer is abutted with a filtering baffle, a fixed sliding groove is formed in the side end of each filtering baffle, a sliding pull rod is slidably connected to the inner side of the fixed sliding groove, a sliding frame is fixedly connected to the side end of the sliding pull rod, and a cleaning brush is fixedly connected to the bottom end of the sliding frame;
the neutralizing mechanism comprises a neutralizing agent box, a partition plate is fixedly mounted in the middle of the neutralizing agent box, the partition plate penetrates through the middle of an inner cavity of the neutralizing agent box, a first water pump is placed at the bottom end of the inner cavity of the neutralizing agent box, an alkali liquor pipeline is fixedly connected to a water outlet of the first water pump, a second water pump is placed at the bottom end of the inner cavity of the neutralizing agent box, an acid liquor pipeline is fixedly connected to a water outlet of the first water pump, the first water pump and the alkali liquor pipeline are distributed at two ends of the partition plate, the other end of the alkali liquor pipeline is led to an inner cavity of a first spray tower, a plurality of neutralizing agent nozzles are fixedly mounted at the bottom end of the alkali liquor pipeline, the other end of the acid liquor pipeline is led to an inner cavity of a second spray tower, and the neutralizing agent nozzles are fixedly mounted and = at the bottom end of the acid liquor pipeline.
Preferably, the top fixing clamping of first spray tower inner chamber has first filter layer, the top fixing clamping of second spray tower inner chamber has the second filter layer, first filter layer closely laminates with the inner wall of first spray tower, the second filter layer closely laminates with the inner wall of second spray tower.
Preferably, the first filter layer and the second filter layer are absorbent cotton members, the first filter layer is acidic, and the second filter layer is alkaline.
Preferably, the clearance brush is the nylon material component, the length of clearance brush is greater than the width of filtering baffle, the bottom of clearance brush and the top butt of filtering baffle.
Preferably, first filter layer, neutralizer shower nozzle, clearance mechanism are in proper order from last to installing in the inner chamber of first spray column down, second filter layer, neutralizer shower nozzle, clearance mechanism are in proper order from last to installing in the inner chamber of second spray column down.
Preferably, the sealing layer is a rubber component, two ends of the sealing layer are respectively abutted against the inner walls of the filtering baffle and the first spray tower, and two ends of the sealing layer are respectively abutted against the inner walls of the filtering baffle and the second spray tower.
Preferably, the length of the sliding pull rod is consistent with that of the filtering baffle, the outer surface of the sliding pull rod is smooth, the bottom end of the sliding pull rod is provided with a rectangular bump, and the outer surface of the bump is rough.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the first spray tower, the neutralizing mechanism and the second spray tower are matched with each other, so that the waste gas is purified by the first spray tower and the second spray tower, the retention time of the waste gas is prolonged, and the purification degree of the waste gas is improved; and through mutually supporting of fixed dog and filtering baffle for the impurity that produces can be collected through filtering baffle in the exhaust purification process, and rethread clearance brush is cleaned, has realized the collection processing to reaction product, has improved purification efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the external structure of the present invention;
FIG. 3 is a schematic view of the cleaning mechanism of the present invention;
FIG. 4 is a schematic view of a partial structure of the cleaning mechanism of the present invention;
FIG. 5 is a schematic view of the neutralizer tank of the present invention.
[ reference numerals ]
1. A first spray tower; 2. an exhaust gas inlet; 3. a cleaning mechanism; 4. a neutralizer spray head; 5. a first filter layer; 6. an exhaust gas conduit; 7. a neutralization mechanism; 8. a suction fan; 9. an air duct; 10. a second spray tower; 11. a second filter layer; 31. a sealing layer; 32. fixing a stop block; 33. a filtering baffle; 34. fixing the chute; 35. a sliding pull rod; 36. a carriage; 37. cleaning the brush; 71. a neutralizer box; 72. a first water pump; 73. an alkali liquor pipeline; 74. an acid liquor pipeline; 75. and a second water pump.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides an acid-base waste gas treatment spray tower as shown in fig. 1 to 5, which comprises a first spray tower 1, wherein a waste gas inlet 2 is fixedly connected to the side end of the first spray tower 1, a cleaning mechanism 3 is slidably mounted on the side end of the first spray tower 1, a waste gas pipeline 6 is fixedly connected to the top end of the first spray tower 1, a neutralizing mechanism 7 is placed on the side end of the first spray tower 1, a suction fan 8 is fixedly connected to the side end of the waste gas pipeline 6, the other end of the suction fan 8 is fixedly connected with an air duct 9, the side end of the air duct 9 is fixedly connected with a second spray tower 10, and the cleaning mechanism 3 is located on the side end of the second spray tower 10;
the cleaning mechanism 3 comprises a fixed stop 32, sealing layers 31 are fixedly mounted at two ends of the top end of the fixed stop 32, the top end of each sealing layer 31 is abutted with a filtering baffle 33, a fixed sliding groove 34 is formed in the side end of each filtering baffle 33, a sliding pull rod 35 is slidably connected to the inner side of each fixed sliding groove 34, a sliding frame 36 is fixedly connected to the side end of each sliding pull rod 35, and a cleaning brush 37 is fixedly connected to the bottom end of each sliding frame 36;
the neutralizing mechanism 7 comprises a neutralizing agent box 71, a partition board is fixedly arranged in the middle of the neutralizing agent box 71 and penetrates through the middle of an inner cavity of the neutralizing agent box 71, a first water pump 72 is arranged at the bottom end of the inner cavity of the neutralizing agent box 71, an alkali liquor pipeline 73 is fixedly connected to a water outlet of the first water pump 72, a second water pump 75 is arranged at the bottom end of the inner cavity of the neutralizing agent box 71, an acid liquor pipeline 74 is fixedly connected to a water outlet of the first water pump 72, the first water pump 72 and the alkali liquor pipeline 73 are distributed at two ends of the partition board, the other end of the alkali liquor pipeline 73 is communicated with the inner cavity of the first spray tower 1, a plurality of neutralizing agent nozzles 4 are fixedly arranged at the bottom end of the alkali liquor pipeline 73, the other end of the acid liquor pipeline 74 is communicated with the inner cavity of the second spray tower 10, the neutralizing agent nozzles 4 are fixedly arranged at the bottom end of the acid liquor pipeline 74, a first filter layer 5 is fixedly clamped at the top end of the inner cavity of the first spray tower 1, a second filter layer 11 is fixedly clamped at the top end of the inner cavity of the second spray tower 10, first filter layer 5 closely laminates with the inner wall of first spray column 1, second filter layer 11 closely laminates with the inner wall of second spray column 10, first filter layer 5, neutralizer shower nozzle 4, clearance mechanism 3 is in proper order from last to installing in the inner chamber of first spray column 1 down, second filter layer 11, neutralizer shower nozzle 4, clearance mechanism 3 is in proper order from last to installing in the inner chamber of second spray column 10 down, the length of slide pull rod 35 is unanimous with the length of filtering baffle 33, the surface of slide pull rod 35 is smooth, the bottom of slide pull rod 35 is the rectangle lug, the lug surface is coarse.
As shown in fig. 1, the first filter layer 5 and the second filter layer 11 are absorbent cotton members, the first filter layer 5 is acidic, and the second filter layer 11 is alkaline.
Specifically, the first filter layer 5 and the second filter layer 11 are absorbent cotton members, the first filter layer 5 is acidic, and the second filter layer 11 is alkaline, so that the waste gas can be secondarily purified through treatment and purification.
As shown in fig. 4, the cleaning brush 37 is made of nylon material, the length of the cleaning brush 37 is greater than the width of the filtering baffle 33, and the bottom end of the cleaning brush 37 abuts against the top end of the filtering baffle 33.
Specifically, clearance brush 37 is the nylon material component, clearance brush 37's length is greater than the width of filtering baffle 33, clearance brush 37's bottom and filtering baffle 33's top butt for reaction product can fully clear up.
As shown in fig. 3, the sealing layer 31 is made of rubber, both ends of the sealing layer 31 are respectively in contact with the filtering baffle 33 and the inner wall of the first spray tower 1, and both ends of the sealing layer 31 are respectively in contact with the filtering baffle 33 and the inner wall of the second spray tower 10.
Specifically, the sealing layer 31 is a rubber component, two ends of the sealing layer 31 are respectively abutted to the inner walls of the filtering baffle 33 and the first spray tower 1, and two ends of the sealing layer 31 are respectively abutted to the inner walls of the filtering baffle 33 and the second spray tower 10, so that the first spray tower 1 and the second spray tower 10 are internally sealed, and the waste gas is prevented from escaping.
Wherein the first water pump 72 and the second water pump 75 are YHY 80; the suction fan 8 is of the type CZTD.
The working process of the invention is as follows:
in the scheme, through the mutual matching of the first spray tower 1, the neutralizing mechanism 7 and the second spray tower 10, so that the waste gas firstly passes through the inner cavity of the first spray tower 1, the alkaline neutralizing liquid in the alkaline liquor pipeline 73 is dispersed through the neutralizing agent nozzle 4 to fully contact and react with the acid gas in the waste gas, and then the alkaline neutralizing liquid is primarily purified with the alkaline gas in the waste gas through the first filter layer 5, the preliminarily purified waste gas is pumped by the suction fan 8 to the inner cavity of the second spray tower 10, the acid neutralizing liquid in the acid liquor pipeline 74 is dispersed in the alkaline gas in the waste gas through the neutralizing agent sprayer 4 for purification, and then the second filter layer 11 reacts with the acid gas in the waste gas, so that the retention time of the waste gas is prolonged, the purification degree of the waste gas is improved, the problem that the purification effect is low due to the short waste gas purification time is avoided, and the purification efficiency is ensured.
Above-mentioned scheme, through mutually supporting of fixed dog 32 and filtering baffle 33, make the impurity that produces among the exhaust purification process can collect through filtering baffle 33, take off fixed dog 32, make filtering baffle 33 slope, rethread fixed chute 34 slides at filtering baffle 33's side and drives carriage 36 and slide, and then drive clearance brush 37 and clean filtering baffle 33's surface, realized the collection processing to reaction product, purification efficiency is improved, reaction product has been avoided piling up influences the purification process, the continuation of exhaust treatment work is gone on has been guaranteed.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. An acid-base waste gas treatment spray tower comprises a first spray tower, wherein a waste gas inlet is fixedly connected to the side end of the first spray tower, and the acid-base waste gas treatment spray tower is characterized in that a cleaning mechanism is slidably mounted at the side end of the first spray tower, a waste gas pipeline is fixedly connected to the top end of the first spray tower, a neutralizing mechanism is placed at the side end of the first spray tower, a suction fan is fixedly connected to the side end of the waste gas pipeline, a vent pipeline is fixedly connected to the other end of the suction fan, a second spray tower is fixedly connected to the side end of the vent pipeline, and the cleaning mechanism is located at the side end of the second spray tower;
the cleaning mechanism comprises a fixed stop block, sealing layers are fixedly mounted at two ends of the top end of the fixed stop block, the top end of each sealing layer is abutted with a filtering baffle, a fixed sliding groove is formed in the side end of each filtering baffle, a sliding pull rod is slidably connected to the inner side of the fixed sliding groove, a sliding frame is fixedly connected to the side end of the sliding pull rod, and a cleaning brush is fixedly connected to the bottom end of the sliding frame;
the neutralizing mechanism comprises a neutralizing agent box, a partition plate is fixedly mounted in the middle of the neutralizing agent box, the partition plate penetrates through the middle of an inner cavity of the neutralizing agent box, a first water pump is placed at the bottom end of the inner cavity of the neutralizing agent box, an alkali liquor pipeline is fixedly connected to a water outlet of the first water pump, a second water pump is placed at the bottom end of the inner cavity of the neutralizing agent box, an acid liquor pipeline is fixedly connected to a water outlet of the first water pump, the first water pump and the alkali liquor pipeline are distributed at two ends of the partition plate, the other end of the alkali liquor pipeline is led to an inner cavity of a first spray tower, a plurality of neutralizing agent nozzles are fixedly mounted at the bottom end of the alkali liquor pipeline, the other end of the acid liquor pipeline is led to an inner cavity of a second spray tower, and the neutralizing agent nozzles are fixedly mounted and = at the bottom end of the acid liquor pipeline.
2. The acid-base waste gas treatment spray tower of claim 1, wherein a first filter layer is fixedly clamped at the top end of the inner cavity of the first spray tower, a second filter layer is fixedly clamped at the top end of the inner cavity of the second spray tower, the first filter layer is tightly attached to the inner wall of the first spray tower, and the second filter layer is tightly attached to the inner wall of the second spray tower.
3. The acid-base waste gas treatment spray tower of claim 2, wherein the first filter layer and the second filter layer are absorbent cotton members, the first filter layer is acidic, and the second filter layer is alkaline.
4. The acid-base waste gas treatment spray tower of claim 1, wherein the cleaning brush is a nylon member, the cleaning brush has a length greater than the width of the filtering baffle, and the bottom end of the cleaning brush abuts against the top end of the filtering baffle.
5. The acid-base waste gas treatment spray tower of claim 1, wherein the first filter layer, the neutralizer nozzle and the cleaning mechanism are sequentially installed in an inner cavity of the first spray tower from top to bottom, and the second filter layer, the neutralizer nozzle and the cleaning mechanism are sequentially installed in an inner cavity of the second spray tower from top to bottom.
6. The acid-base exhaust gas treatment spray tower of claim 1, wherein the sealing layer is a rubber member, both ends of the sealing layer are respectively abutted against the filtering baffle and the inner wall of the first spray tower, and both ends of the sealing layer are respectively abutted against the filtering baffle and the inner wall of the second spray tower.
7. The acid-base waste gas treatment spray tower of claim 1, wherein the length of the sliding pull rod is consistent with that of the filtering baffle, the outer surface of the sliding pull rod is smooth, the bottom end of the sliding pull rod is provided with a rectangular bump, and the outer surface of the bump is rough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011107829.3A CN114377534A (en) | 2020-10-16 | 2020-10-16 | Acid-base waste gas treatment spray tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011107829.3A CN114377534A (en) | 2020-10-16 | 2020-10-16 | Acid-base waste gas treatment spray tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114377534A true CN114377534A (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011107829.3A Pending CN114377534A (en) | 2020-10-16 | 2020-10-16 | Acid-base waste gas treatment spray tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN114377534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115849669A (en) * | 2023-02-21 | 2023-03-28 | 山东成达环保科技有限公司 | Sludge conveying and treating device and implementation method thereof |
-
2020
- 2020-10-16 CN CN202011107829.3A patent/CN114377534A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115849669A (en) * | 2023-02-21 | 2023-03-28 | 山东成达环保科技有限公司 | Sludge conveying and treating device and implementation method thereof |
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Application publication date: 20220422 |