CN209618975U - A kind of boiler deoxidizing method device - Google Patents
A kind of boiler deoxidizing method device Download PDFInfo
- Publication number
- CN209618975U CN209618975U CN201920243732.1U CN201920243732U CN209618975U CN 209618975 U CN209618975 U CN 209618975U CN 201920243732 U CN201920243732 U CN 201920243732U CN 209618975 U CN209618975 U CN 209618975U
- Authority
- CN
- China
- Prior art keywords
- tank body
- screw rod
- scraper plate
- scraper
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 157
- 229910052742 iron Inorganic materials 0.000 claims abstract description 78
- 239000000084 colloidal system Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000010865 sewage Substances 0.000 claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 230000011218 segmentation Effects 0.000 claims abstract description 4
- 238000007790 scraping Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 238000004140 cleaning Methods 0.000 abstract description 16
- 238000006392 deoxygenation reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000008400 supply water Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Physical Water Treatments (AREA)
Abstract
The utility model relates to a kind of boiler deoxidizing method devices, including support frame and tank body, it is set in tank body tank interior is divided into the filter plate of upper chamber and lower chambers, the sponge iron being arranged in filter plate, the water inlet pipe for being fixed on tank body and being connected to lower chambers and the first sewage pipe, is fixed on tank body and is connected to upper chamber outlet pipe and backwash tube, two pieces of scraper plates are slidably connected in tank body；Tank body both ends are equipped with the second sewage pipe；Tank body is equipped with for driving two pieces of scraper plates to do the driving mechanism that synchronous backward moves along length of tank direction, driving mechanism includes screw rod and stepper motor, screw rod is two opposite segmentations of the hand of spiral, and two segmented threads opposite with the hand of spiral on screw rod cooperate two scraper plates respectively；Driving mechanism further includes the limit assembly being arranged between scraper plate and tank body.Compared to traditional manual cleaning, the program is more preferable to the cleaning effect of iron colloid, and cleaning efficiency is higher, also facilitates the clean operation of operator.
Description
Technical field
The utility model relates to the technical fields of deaerated feedwater equipment, more particularly, to a kind of boiler deoxidizing method device.
Background technique
With the continuous improvement of boiler efficiency and pressure rating, various high temperature, high pressure, high-efficiency boiler are thrown in succession
Enter industrial production, for the safety and stability long-term operation for guaranteeing boiler, boiler supply water deaerating has become boiler safety and economic fortune
Row main indicator.
Currently, domestic industry boiler, which still has when in use using sponge iron, carries out deoxygenation to boiler feed water, sponge iron
Deaerating effect is although excellent, but sponge iron can generate iron colloid in oxygen removal process and prevent the progress of deoxygenation, and iron glue
Body, which can also generate iron dirt, to be influenced the heat transfer of boiler and shortens the service life of boiler.Traditional boiler supply water deaerating device is being cleared up
When the iron colloid generated inside device, often worker's hand-held cleaning tool clears up the iron colloid in working chamber, passes
The manual cleaning of system, cleaning effect is undesirable, time-consuming effort, and cleaning efficiency is very low.
Utility model content
The purpose of the utility model is to provide a kind of boiler deoxidizing method devices, can efficiently clear up the iron colloid of tank interior.
The above-mentioned purpose of utility model of the utility model has the technical scheme that
A kind of boiler deoxidizing method device including support frame and installation tank body on the support frame, is set to tank body in tank body
Inside is divided into the filter plate of upper chamber and lower chambers, be arranged in filter plate for the sponge iron of deoxygenation, be fixed on tank body and
The water inlet pipe and the first sewage pipe that are connected to lower chambers, the outlet pipe for being fixed on tank body and being connected to upper chamber and backwash
It manages, two pieces is slidably connected in the tank body for striking off the scraper plates of tank base iron colloid；The tank body both ends are all provided with useful
In the second sewage pipe of discharge iron colloid；The tank body is equipped with for driving two pieces of scraper plates to synchronize instead along length of tank direction
To the driving mechanism of movement, driving mechanism includes across two pieces of scraper plates and the screw rod that is threadedly engaged with two pieces of scraper plates and being used for
The stepper motor drived screw rod rotation, the screw rod are divided into two opposite segmentations of the hand of spiral, two pieces of scraper plates respectively with screw rod
The opposite two segmented threads cooperation of the upper hand of spiral；Driving mechanism further includes being arranged between scraper plate and tank body to scrape for limiting
The limit assembly that plate is rotated with screw rod.
By using above-mentioned technical proposal, for raw water when passing through filter plate and sponge iron, the oxygen in raw water will be with sponge iron
Rapidly and thoroughly oxidation reaction occurs, and then achievees the effect that raw water deoxygenation.The setting of backwash tube and the first sewage pipe, makes
Device is provided with backwashing function, improves the filter effect and filtering times of filter plate and sponge iron.When tank body accumulation have compared with
When more iron colloids, operator starts stepper motor and screw rod is first driven to rotate in the forward direction a period of time, two pieces of scraper plates with fixed angle
Under collective effect of the screw thread with limit assembly by along length of tank direction do it is synchronous move backwards, scraper plate is during exercise just
Iron colloid in inner tank wall can be struck off, and the second sewage pipe that iron colloid is pushed into two sides is discharged.Then step
Screw rod is driven to reversely rotate a period of time, collective effect of two pieces of scraper plates in screw thread and limit assembly with fixed angle again into motor
It is lower by along length of tank direction do it is synchronous move toward one another, scraper plate during exercise will carry out the iron colloid in inner tank wall
It strikes off, and iron colloid is pushed into the first sewage pipe and is discharged.Compared to traditional manual cleaning, the program is clear to iron colloid
Reason effect is more preferable, and cleaning efficiency is higher, also facilitates the clean operation of operator.
The utility model is further arranged to: the limit assembly includes the limit being axially provided on scraper plate along screw rod
Hole is fixed in tank body and the limited post parallel with screw rod, the outer wall of the limited post are pushed against in the inner wall of limit hole.
By using above-mentioned technical proposal, the setting of limit hole and limited post effectively prevents scraper plate with screw rod and does week
It to rotation, move in a straight line scraper plate can only along the axial of screw rod in tank body.
The utility model is further arranged to: on the inner wall of the limit hole roll be embedded with it is multiple with limit column outer wall support
The ball connect.
By using above-mentioned technical proposal, the setting of ball makes the sliding friction that generation is contacted between limit hole and limited post
Become rolling friction, reduce the resistance between scraper plate and limited post, and then makes scraper plate that can more swimmingly slide on tank interior,
Be conducive to improve the cleaning efficiency of iron colloid in tank body.
The utility model is further arranged to: the cross section of the tank body inner bottom wall is V-shaped, corresponding, the scraper plate
Lower end it is also V-shaped and with tank body inner bottom wall cooperation.
By using above-mentioned technical proposal, the V-arrangement of tank body inner bottom wall is arranged, and can have a receipts to the intracorporal iron colloid of tank
Collect guiding role, the iron colloid in tank body can be made to be deposited on the middle part of tank body as far as possible, subsequent scraper plate to iron colloid into
During row strikes off and pushes, what can also more be concentrated is struck off and is pushed to iron colloid, up to iron colloid is pushed into the
One sewage pipe and the discharge of the second sewage pipe, can be improved the cleaning efficiency of tank interior iron colloid.
The utility model is further arranged to: the scraper plate be provided with along the two sides of the screw rod axial direction with it is described
Inner tank wall abuts and pointed scraping edge.
By using above-mentioned technical proposal, pointed scraping edge reduces the contact area between scraper plate and iron colloid, increases
Pressure between the two, is stripped off the iron colloid in inner tank wall more easily successfully.
The utility model is further arranged to: being offered on the scraper plate and multiple iron colloid is allowed to be moved to the scraper plate other side
Through-hole, the through-hole are provided with the position that scraper plate leans on close over.
By using above-mentioned technical proposal, during scraper plate pushes iron colloid to the first sewage pipe and the second sewage pipe,
If the iron colloid of scraper plate side is excessive, iron colloid is moved to the other side of scraper plate by through-hole, reduces iron colloid to scraper plate
Resistance, one reduces the load of stepper motor, to stepper motor plays a degree of protective effect, and two make scraper plate pair
Striking off and pushing for iron colloid is more smooth.
The utility model is further arranged to: multiple groups nozzle is equipped on the inner sidewall of the lower chambers, outside the tank body
Equipped with water tank and the high-pressure hydraulic pump connecting with water tank, water pipe is connected between the high-pressure hydraulic pump and the nozzle.
By using above-mentioned technical proposal, the clear water in water tank successively passes through high-pressure hydraulic pump, water pipe and arrives ejection at nozzle again,
The iron colloid that not only can effectively wash away inner tank wall and blade surface attachment, makes scraper plate striking off and pushing away to iron colloid
It moves more convenient and smooth, makes the intracorporal cleaning effect of tank more preferably.
The utility model is further arranged to: the side wall of the tank body is equipped with observation window.
By using above-mentioned technical proposal, operator can very easily observe the feelings of tank interior through observation window
Condition is conducive to the development of iron colloid cleaning work.
In conclusion the advantageous effects of the utility model are as follows:
1. the setting of scraper plate, the second sewage pipe and driving mechanism keeps the cleaning efficiency of iron colloid in tank body higher, cleaning effect
Fruit is more preferably；
2. the V-arrangement of tank body inner bottom wall is arranged, the cleaning efficiency of tank base iron colloid can be improved；
3. the setting of through-hole can play a degree of protective effect to stepper motor, avoid stepper motor load excessive
And it burns.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the broken section structural schematic diagram in the utility model at tank body.
Fig. 3 is the partial enlargement diagram of part A in Fig. 2.
In figure, 1, support frame；2, tank body；3, sponge iron；4, filter plate；5, upper chamber；6, lower chambers；7, water inlet pipe；8,
Outlet pipe；9, backwash tube；10, the first sewage pipe；11, observation window；12, scraper plate；13, scraping edge；14, screw rod；15, stepping electricity
Machine；16, the second sewage pipe；17, limit assembly；171, limit hole；172, limited post；18, ball；19, through-hole；20, nozzle；
21, high-pressure hydraulic pump；22, water tank；23, water pipe.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Figures 1 and 2, a kind of boiler deoxidizing method device, including support frame 1 and be mounted on support frame 1 and cross section is in
The tank body 2 of rectangle is horizontally arranged at 2 inside of tank body and the filter plate 4 of sponge iron 3 is housed, which will draw inside tank body 2
It is divided into 6 two parts of upper chamber 5 and lower chambers；Boiler supply water deaerating device further includes being welded in 2 lower section of tank body and connecting with lower chambers 6
Logical water inlet pipe 7, the outlet pipe 8 for being welded in 2 top of tank body and being connected to upper chamber 5.Raw water enters tank body 2 from water inlet pipe 7
Interior, with the increase of raw water volume, raw water passes through filter plate 4 and sponge iron 3, due to this special metallic iron of sponge iron 3
With huge specific surface area, when passing through filter plate 4, thoroughly oxidation will occur rapidly raw water with sponge iron 3 for the oxygen in water
Reaction, and then achieve the effect that the water to raw water deoxygenation, by deoxygenation injects in subsequent boiler using outlet pipe 8.
The middle part of 2 top of tank body is welded with the backwash tube 9 being connected to upper chamber 5, and the middle part welding of 2 lower section of tank body is useful
In first sewage pipe 10(such as Fig. 1 of discharge iron colloid).After filter plate 4 has filtered raw water, outlet pipe 8 and water inlet pipe 7 are closed,
Clear water is entered in tank body 2 by backwash tube 9 and is discharged from the first sewage pipe 10, with the flowing of clear water, sponge iron 3 and mistake
The iron colloid adhered to below filter plate 4 will be also detached from from filter plate 4 and sponge iron 3 with the flowing of clear water, and iron colloid will be final
It is discharged from first sewage pipe 10(such as Fig. 1), and then filter plate 4 and sponge iron 3 is backwashed, improve 4 He of filter plate
The filter effect and filtering times of sponge iron 3.
Observation window 11 is installed, operator can quickly and easily observe tank body 2 by observation window 11 on 2 side wall of tank body
Internal situation is conducive to the progress that filter plate 4 and sponge iron 3 backwash.
Two pieces are equipped with referring to Fig. 2, inside lower chambers 6 for striking off the scraper plate 12 of iron colloid on 2 inner wall of tank body, two pieces of scraper plates
12 can slide along 2 length of tank body, the integrally V-shaped setting of the lower end of scraper plate 12, corresponding, the inner bottom wall of lower chambers 6
Also V-shaped to be arranged and contacted with 12 lower end of scraper plate.In order to improve scraper plate 12 to the scraping effect of iron colloid, on 12 edge of scraper plate
Pointed scraping edge 13 is fixedly connected on the two sides of 2 length direction of tank body.
Referring to Fig. 2 and Fig. 3,6 inner rotation of lower chambers is connected with a screw rod 14, which passes perpendicularly through two pieces of scraper plates
12, and screw rod 14 is axially set in parallel with 2 length direction of tank body.Thread groove on screw rod 14 is divided into opposite two of the hand of spiral
A segmentation, opposite with the hand of spiral on the screw rod 14 two segmented threads cooperation respectively of two pieces of scraper plates 12.It wears one end of screw rod 14
2 side wall of tank body and the stepper motor 15 for inverting circuit sequentially again for driving screw rod 14 first to rotate forward with fixed angle is installed out,
Stepper motor 15 connects to power supply block by electric wire, and the both ends of 2 lower section of tank body are welded with the second blowdown being connected to lower chambers 6
Pipe 16.It is additionally provided with the limit assembly 17 rotated for limiting scraper 12 with screw rod 14 between tank body 2 and scraper plate 12, limits
Component 17 includes axially through the limit hole 171 that is provided on scraper plate 12 and being fixed on 2 inner wall of tank body along screw rod 14 and passing through limit
The limited post 172 in position hole 171,172 length direction of limited post are set in parallel with 2 length direction of tank body, the inner wall of limit hole 171
Upper rolling is embedded there are six the ball 18 abutted with 172 periphery wall of limited post, and six balls 18 are uniform around the axis of limited post 172
Distribution.Stepper motor 15 first drives screw rod 14 to rotate in the forward direction a period of time with fixed angle after starting, then drive screw rod 14 again
A period of time is reversely rotated with fixed angle and is looped back and forth like this, and two pieces of scraper plates 12 are in screw thread, limited post 172 and limit hole
Synchronous counter motion will be done along 2 length direction of tank body under 171 collective effect, so to the iron colloid of 2 inner wall of tank body into
Row strikes off, and iron colloid is pushed into the first sewage pipe 10 and the second sewage pipe 16 is discharged.
Referring to Fig. 2, the length direction on scraper plate 12 along tank body 2 offers the rounded through-hole 19 in multiple groups section, through-hole 19
It is provided with the position that scraper plate 12 leans on close over.Opening up for through-hole 19 can make scraper plate 12 when striking off iron colloid, make excessive iron
Colloid passes through the other side that through-hole 19 flow to scraper plate 12, reduces the resistance that scraper plate 12 is subject to, and then reduce stepper motor 15
Load, play a protective role to stepper motor 15.
Referring to Figures 1 and 2, multiple nozzles 20 are installed on the inner wall of lower chambers 6, high-pressure hydraulic pump 21 is installed outside tank body 2
With water tank 22,21 one end of high-pressure hydraulic pump is connect with water tank 22, and the other end of high-pressure hydraulic pump 21 is equipped with water pipe 23, and water pipe 23 is separate
One end of high-pressure hydraulic pump 21 is connected to multiple nozzles 20, in addition, high-pressure hydraulic pump 21 is connect by electric wire with same power supply.High pressure
After water pump 21 starts, the clear water in water tank 22 successively passes through high-pressure hydraulic pump 21, water pipe 23 and finally sprays from nozzle 20, scraper plate
12 when striking off iron colloid, and the clear water sprayed at nozzle 20 can effectively wash away 2 inner wall of tank body and scraper plate 12
The iron colloid of surface attachment makes iron colloid be easier to be discharged from the first sewage pipe 10 and the second sewage pipe 16.
The implementation principle of the present embodiment are as follows: when observer sees that 6 bottom of lower chambers is attached with more iron through observation window 11
When colloid, operator starts stepper motor 15 and screw rod 14 is first driven to rotate in the forward direction a period of time, two pieces of scraper plates 12 with fixed angle
Under screw thread, limited post 172 and the collective effect of limit hole 171 by along 2 length direction of tank body do it is synchronous move backwards, scrape
Plate 12 will strike off the iron colloid of 6 inner wall of lower chambers, and the second sewage pipe 16 that iron colloid is pushed into 2 both ends of tank body is carried out
Discharge.Subsequent stepper motor 15 drives screw rod 14 to reversely rotate a period of time with fixed angle again, and two pieces of scraper plates 12 are in screw thread, limit
Position column 172 under the collective effect of limit hole 171 by along 2 length direction of tank body do it is synchronous move toward one another, scraper plate 12 will again
The secondary iron colloid to 6 inner wall of lower chambers strikes off, and the first sewage pipe 10 that iron colloid is pushed into 2 lower section middle part of tank body is carried out
Discharge, screw rod 14 successively positive and negative rotation and so recycle under the driving of stepper motor 15.In addition, in the process for striking off iron colloid
In, the clear water that nozzle 20 sprays can also wash away the iron colloid adhered on 2 inner wall of tank body and scraper plate 12, enable iron colloid more
Successfully it is cleaned.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (8)
1. a kind of boiler deoxidizing method device including support frame (1) and the tank body (2) being mounted on support frame (1), is set to tank body
(2) filter plate (4) for being divided into upper chamber (5) and lower chambers (6) inside tank body (2), setting are used to remove in filter plate (4) in
The sponge iron (3) of oxygen, the water inlet pipe (7) for being fixed on tank body (2) and being connected to lower chambers (6) and the first sewage pipe (10) are consolidated
The outlet pipe (8) and backwash tube (9) for being connected on tank body (2) and being connected to upper chamber (5), it is characterised in that: the tank body (2)
Two pieces are inside slidably connected for striking off the scraper plate (12) of tank body (2) bottom iron colloid；Tank body (2) both ends, which are equipped with, to be used for
The second sewage pipe (16) of iron colloid is discharged；The tank body (2) is equipped with for driving two pieces of scraper plates (12) along tank body (2) length
Direction do synchronous backward movement driving mechanism, driving mechanism include across two pieces of scraper plates (12) and with two pieces of equal spiral shells of scraper plate (12)
The screw rod (14) that line cooperates and the stepper motor (15) for driving screw rod (14) to rotate, the screw rod (14) are divided into spiral side
To opposite two segmentations, two segmented threads opposite with the hand of spiral on screw rod (14) cooperate two pieces of scraper plates (12) respectively；
Driving mechanism further includes being arranged between scraper plate (12) and tank body (2) to rotate for limiting scraper (12) with screw rod (14)
Limit assembly (17).
2. a kind of boiler deoxidizing method device according to claim 1, it is characterised in that: the limit assembly (17) includes along silk
Limit hole (171) that bar (14) is axially provided on scraper plate (12) is fixed in tank body (2) and the limit parallel with screw rod (14)
The outer wall of column (172), the limited post (172) is pushed against in the inner wall of limit hole (171).
3. a kind of boiler deoxidizing method device according to claim 2, it is characterised in that: on the inner wall of the limit hole (171)
Rolling is embedded with multiple balls (18) abutted with limited post (172) outer wall.
4. a kind of boiler deoxidizing method device according to claim 1, it is characterised in that: tank body (2) inner bottom wall it is transversal
Face is V-shaped, corresponding, and the lower end of the scraper plate (12) is also V-shaped and cooperates with the inner bottom wall of tank body (2).
5. a kind of boiler deoxidizing method device according to claim 1, it is characterised in that: the scraper plate (12) is along the screw rod
(14) it is provided with and is abutted with the tank body (2) inner wall and pointed scraping edge (13) on axial two sides.
6. a kind of boiler deoxidizing method device according to claim 1, it is characterised in that: offered on the scraper plate (12) multiple
Iron colloid is allowed to be moved to the through-hole (19) of scraper plate (12) other side, the through-hole (19) is provided with the position that scraper plate (12) lean on close over
It sets.
7. a kind of boiler deoxidizing method device according to claim 1, it is characterised in that: on the inner sidewall of the lower chambers (6)
It is equipped with multiple groups nozzle (20), the high-pressure hydraulic pump (21) that the tank body (2) is externally provided with water tank (22) and connect with water tank (22),
Water pipe (23) are connected between the high-pressure hydraulic pump (21) and the nozzle (20).
8. a kind of boiler deoxidizing method device according to claim 1, it is characterised in that: the side wall of the tank body (2) is equipped with
Observation window (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920243732.1U CN209618975U (en) | 2019-02-26 | 2019-02-26 | A kind of boiler deoxidizing method device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920243732.1U CN209618975U (en) | 2019-02-26 | 2019-02-26 | A kind of boiler deoxidizing method device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209618975U true CN209618975U (en) | 2019-11-12 |
Family
ID=68454974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920243732.1U Expired - Fee Related CN209618975U (en) | 2019-02-26 | 2019-02-26 | A kind of boiler deoxidizing method device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209618975U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112933677A (en) * | 2021-02-02 | 2021-06-11 | 江苏海洋大学 | Sewage removing device for sewage pool of chemical plant |
-
2019
- 2019-02-26 CN CN201920243732.1U patent/CN209618975U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112933677A (en) * | 2021-02-02 | 2021-06-11 | 江苏海洋大学 | Sewage removing device for sewage pool of chemical plant |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |