CN216687783U - Condensed water recycling device and pulping device in papermaking process - Google Patents
Condensed water recycling device and pulping device in papermaking process Download PDFInfo
- Publication number
- CN216687783U CN216687783U CN202122634606.9U CN202122634606U CN216687783U CN 216687783 U CN216687783 U CN 216687783U CN 202122634606 U CN202122634606 U CN 202122634606U CN 216687783 U CN216687783 U CN 216687783U
- Authority
- CN
- China
- Prior art keywords
- condensed water
- control valve
- pipeline
- storage tank
- filtering device
- 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.)
- Active
Links
Images
Landscapes
- Paper (AREA)
Abstract
The utility model discloses a condensed water recycling device and pulping equipment in the papermaking process, wherein the condensed water recycling device comprises: a flash tank; the storage tank comprises a clean condensed water storage tank and a middle condensed water storage tank, and an outlet of the flash tank is communicated with an inlet of the clean condensed water storage tank through a pipeline; the filtering device comprises a first filtering device and a second filtering device, an inlet of the first filtering device and an inlet of the second filtering device are communicated with an outlet of the clean condensed water storage tank through a pipeline, and an outlet of the filtering device is connected with an inlet of the middle condensed water storage tank through a pipeline. In this way, the comdenstion water retrieval and utilization equipment of this application has improved the rate of utilization of evaporation comdenstion water, reduces the clear water use amount in the slurrying condensation, reduces the comdenstion water blowdown water yield, has reduced manufacturing cost.
Description
Technical Field
The utility model relates to the technical field of condensed water filtering processes, in particular to condensed water recycling equipment and pulping equipment in a papermaking process.
Background
Black particle impurity and fibre content are high in the papermaking condensate water, and quality of water can not reach pulping service standard, all need discharge for the sewage plant to handle when quality of water is unqualified, and the comdenstion water rate of recovery is low, and a large amount of comdenstion water discharges and can increase sewage treatment cost, also causes the pulping water cost to rise simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the technical problem of providing condensed water recycling equipment and pulping equipment in the papermaking process, which can effectively improve the recycling rate of the condensed water and reduce the sewage treatment cost and the pulping water cost.
In order to solve the technical problem, the utility model adopts a technical scheme that condensed water recycling equipment is provided, and the condensed water recycling equipment comprises a flash tank; the storage tank comprises a clean condensed water storage tank and a middle condensed water storage tank, and an outlet of the flash tank is communicated with an inlet of the clean condensed water storage tank through a pipeline; the filter device comprises a first filter device and a second filter device, wherein the inlet of the first filter device and the inlet of the second filter device are communicated with the outlet of the clean condensate water storage tank through pipelines, and the outlet of the filter device is connected with the inlet of the middle condensate water storage tank through a passageway.
Wherein the flash tank comprises a clean condensate flash tank, a middle condensate flash tank and a heavy sewage condensate flash tank; the outlet of the clean condensed water flash tank, the outlet of the middle condensed water flash tank and the outlet of the heavy sewage condensed water flash tank are connected with the inlet of the clean condensed water storage tank through pipelines.
Wherein, a flash tank pump is also arranged on the pipeline communicated between the flash tank and the clean condensed water storage tank.
Wherein, the pipeline communicated between the clean condensed water storage tank and the filtering device is also provided with a suction pump.
Wherein, still include: and the first control valve is arranged on a pipeline between the extraction pump and the filtering device.
Wherein, still include: the second control valve is close to the first filtering device and is arranged on a pipeline between the first control valve and the first filtering device, and the fifth control valve is close to the second filtering device and is arranged on a pipeline between the first control valve and the second filtering device.
Wherein, still include: the third control valve is connected with the pipeline between the second control valve and the first filtering device through a pipeline, the fourth control valve is connected with the pipeline between the fifth control valve and the second filtering device through a pipeline, and the third control valve is connected with the fourth control valve through a pipeline.
Wherein, still include: and the sixth control valve is arranged close to the middle condensed water storage tank and is positioned on a pipeline connected with an inlet of the middle condensed water storage tank.
The outlet of the first filtering device and the outlet of the second filtering device are further connected with one end of a seventh control valve through a pipeline, the other end of the seventh control valve is connected with a forward and reverse washing discharge port through a pipeline, and a pipeline between the seventh control valve and the forward and reverse washing discharge port is connected with a pipeline between a third control valve and a fourth control valve through a pipeline.
In order to solve the above technical problem, the present application adopts another technical solution: providing pulping equipment in a papermaking process, which comprises a pulping workshop and condensed water recycling equipment, wherein the condensed water recycling equipment is the condensed water recycling equipment; the pulping workshop comprises a condensed water injection port, the condensed water injection port is connected with a middle condensed water storage tank of condensed water recycling equipment through a pipeline, and a delivery pump is further arranged on the pipeline between the condensed water injection port and the middle condensed water storage tank.
The utility model has the beneficial effects that: different from the situation of the prior art, the condensed water recycling device comprises a flash tank; the storage tank comprises a clean condensed water storage tank and a middle condensed water storage tank, and an outlet of the flash tank is communicated with an inlet of the clean condensed water storage tank through a pipeline; and the filtering device comprises a first filtering device and a second filtering device, and the inlet of the first filtering device and the inlet of the second filtering device are communicated with the outlet of the clean condensed water storage tank through a pipeline.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic view of a process flow structure of an embodiment of a condensate water recycling apparatus according to the present application;
FIG. 2 is a schematic diagram of an embodiment of a pulping apparatus in a papermaking process according to the present application.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present application clearer, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to reduce the content of black particle impurities and fibers of the condensed water used in the papermaking process, the used condensed water reaches the pulping use standard again, and the recycling rate of the condensed water is improved. The application provides a comdenstion water retrieval and utilization equipment, this comdenstion water retrieval and utilization equipment is provided with two filter equipment, filters out the comdenstion water that contains impurity from evaporating system, filters black particle debris and fibre in the comdenstion water, and qualified comdenstion water gets into the hold up tank, and the reuse pump gives the pulping workshop. The clear water consumption for pulping is reduced, and the production cost is reduced.
The following describes a condensate water recycling apparatus 1 according to the present invention in detail with reference to the following embodiments.
Referring to fig. 1, fig. 1 is a schematic view of a process flow structure of an embodiment of a condensed water recycling apparatus 1 of the present application. The condensed water recycling device 1 comprises a flash tank 10, a storage tank 11 and a filtering device 12.
In this embodiment, the condensed water to be treated is discharged into the flash tank 10 in the pulping workshop, the pressure inside the flash tank 10 is less than the standard atmospheric pressure, and after the high-temperature condensed water enters the flash tank 10, due to the sudden reduction of the pressure, the boiling point of the condensed water is reduced, and the condensed water is rapidly boiled and gasified in the flash tank 10.
In this embodiment, the storage tank 11 comprises a clean condensate storage tank 111 and an intermediate condensate storage tank 112, and the outlet of the flash tank 10 is in communication with the inlet of the clean condensate storage tank 111 via a pipe. Specifically, the condensed water in the flash tank 10 is boiled into gas and then enters the clean condensed water storage tank 111 along with the pipeline, and is condensed into liquid again, and the clean condensed water storage tank 111 is used for temporarily storing the condensed water.
In this embodiment, the filtering device 12 includes a first filtering device 121 and a second filtering device 122, an inlet of the first filtering device 121 and an inlet of the second filtering device 122 are both connected to an outlet of the clean condensed water storage tank 111 through a pipeline, and an outlet of the filtering device 12 is connected to an inlet of the intermediate condensed water storage tank 112 through a pipeline. In this embodiment, the filtering device 12 is a shallow sand filtering device, and in other embodiments, the filtering device 12 may also be other filtering devices such as a quartz sand filtering device, which is not limited herein. In this embodiment, two filtering devices 12 are provided to increase the filtering speed of the condensed water, and in other embodiments, three or other filtering devices 12 may be provided, and the condensed water filtered by the filtering devices 12 may be temporarily stored in the middle condensed water storage tank 112.
In the present embodiment, the flash tank 10 includes a clean condensate flash tank 101, an intermediate condensate flash tank 102, and a heavy sewage flash tank 103; the outlet of the clean condensate flash tank 101, the outlet of the intermediate condensate flash tank 102 and the outlet of the heavy sewage flash tank 103 are connected to the inlet of the clean condensate storage tank 111 by pipes. Specifically, the middle condensed water flash tank 102 and the heavy sewage condensed water flash tank 103 are used for containing condensed water to be treated, and the clean condensed water flash tank 101 is used for pre-discharging clean forward-washing backwash liquid for forward-washing and backwashing the condensed water recycling equipment.
In this embodiment, a flash tank pump 13 is further provided to the pipe communicating between the flash tank 10 and the clean condensed water storage tank 111. A suction pump 14 is further provided on a pipe communicating between the clean condensate storage tank 111 and the filter device 12. Specifically, the flash tank 10 and the flash tank pump 13 of the clean condensate storage tank 111 are used to pump the gaseous condensate in the flash tank 10 to the clean condensate storage tank 111. The suction pump 14 between the clean condensate storage tank 111 and the filter device 12 is used to pump the liquid condensate in the clean condensate storage tank 111 through the filter device 12.
In this embodiment, the condensed water recycling device 1 further includes a first control valve 15, a second control valve 16, a third control valve 17, a fourth control valve 18, a fifth control valve 19, a sixth control valve 20, and a seventh control valve 21.
As shown in fig. 1, a first control valve 15 is provided on the pipe between the suction pump 14 and the filter device 12. The second control valve 16 is disposed on the pipeline between the first control valve 15 and the first filtering device 121 adjacent to the first filtering device 121, and the fifth control valve 19 is disposed on the pipeline between the first control valve 15 and the second filtering device 122 adjacent to the second filtering device 122. The third control valve 17 is connected with the pipeline between the second control valve 16 and the first filtering device 121 through a pipeline, the fourth control valve 18 is connected with the pipeline between the fifth control valve 19 and the second filtering device 122 through a pipeline, and the third control valve 17 is connected with the fourth control valve 18 through a pipeline. The sixth control valve 20 is provided adjacent to the intermediate condensate storage tank 112 on a pipe connected to an inlet of the intermediate condensate storage tank 112. The outlet of the first filter device 121 and the outlet of the second filter device 122 are further connected with one end of a seventh control valve 21 through a pipeline, the other end of the seventh control valve 21 is connected with a forward and reverse washing discharge port 22 through a pipeline, and a pipeline between the seventh control valve 21 and the forward and reverse washing discharge port 22 is connected with a pipeline between the third control valve 17 and the fourth control valve 18 through a pipeline. Specifically, control valves are arranged on all pipelines of the equipment to prevent backflow of condensed water and other fluids, and the flow direction and the flow rate of the condensed water and other fluids in the pipelines are adjusted through the matching of opening and closing of all the control valves. The intermediate condensed water storage tank 112 temporarily stores the condensed water filtered by the filter device 12. The forward backwash discharge port 22 is used to discharge the sewage after the forward backwash of the filter apparatus 12.
It should be noted that the present embodiment only shows the installation position of the control valve on the pipeline among the clean condensate storage tank 111, the filtering device 12 and the middle condensate storage tank 112, as long as the control valve is installed, the flow direction and flow rate of the condensate and other fluids in the pipeline can be adjusted, so that the condensate can flow through the filtering device 12 for filtering and then performing the forward and backward washing on the filtering device. They are all included in the scope of protection of the condensate water recycling apparatus 1 of the present application and are not specifically limited herein.
Different from the prior art, the application provides a condensate water recycling device, which comprises a flash tank; the storage tank comprises a clean condensed water storage tank and a middle condensed water storage tank, and an outlet of the flash tank is communicated with an inlet of the clean condensed water storage tank through a pipeline; and the filtering device comprises a first filtering device and a second filtering device, and the inlet of the first filtering device and the inlet of the second filtering device are communicated with the outlet of the clean condensed water storage tank through a pipeline. And each connecting pipeline is also provided with a control valve. The condensate water recycling equipment adjusts the flow direction and the flow of condensate water and other fluids in the pipeline through the matching of opening and closing of each control valve, and leads the condensate water to flow through the filtering device for filtering.
The present application further provides a pulping apparatus in a papermaking process, and specifically, referring to fig. 2, the pulping apparatus 300 in the papermaking process includes a pulping workshop 32 and a condensed water recycling apparatus 31.
The pulping workshop 32 comprises a condensed water injection port (not shown), the condensed water injection port is connected with a middle condensed water storage tank (not shown) of the condensed water recycling device 31 through a pipeline, and a delivery pump is further arranged on the pipeline between the condensed water injection port and the middle condensed water storage tank. Specifically, the condensate water filtered by the condensate water recycling device 31 comes from sewage discharge after the condensate water in the pulping workshop 32 is used, the condensate water to be filtered with more impurities is filtered by the condensate water recycling device 31, the water quality reaches the use standard of the condensate water, and the condensate water is pumped into the pulping workshop 32 through the delivery pump again, so that the purpose of condensate water recycling is achieved, and the recycling rate of the condensate water is improved.
Referring back to fig. 1, the flow of the condensed water recycling apparatus 1 of the present invention will be further described with reference to fig. 1.
S11: and (5) filtering the condensed water.
Specifically, during the filtration, the first control valve 15, the second control valve 16, the fifth control valve 19, and the sixth control valve 20 are opened, and the third control valve 17, the fourth control valve 18, and the seventh control valve 21 are closed. After being pumped by the pump 14, the liquid condensate to be filtered in the clean condensate storage tank 111 enters the first filter device 121 and the second filter device 122 through the first control valve 15, the second control valve 16 and the fifth control valve 19, respectively, and after being filtered by the filter device 12, the treated condensate enters the middle condensate storage tank 112 through the sixth control valve 20 for temporary storage. The filtered condensate water temporarily stored in the intermediate condensate water storage tank 112 can be sent to the pulping workshop again through the sending pump for condensation.
S12: the filter apparatus 12 is backwashed.
Specifically, the backwashing of the filter device 12 is divided into the backwashing of the first filter device 121 and the backwashing of the second filter device 122.
When the first filter device 121 is backwashed, the first control valve 15, the third control valve 17, and the fifth control valve 19 are opened, and the second control valve 16, the fourth control valve 18, the sixth control valve 20, and the seventh control valve 21 are closed. After the cleaning water in the cleaning condensed water flash tank 101 is pumped to the cleaning condensed water storage tank 111 by the flash tank pump 13, the cleaning water is pumped by the pump 14 to sequentially pass through the first control valve 15, the fifth control valve 19 and the second filtering device 122, then the cleaning water enters from the first filtering outlet and is discharged from the inlet of the first filtering device 121, and then the cleaning water is discharged from the third control valve 17 through the positive and negative washing discharge port 22, the cleaning water enters from the outlet of the first filtering device 121, and is discharged from the inlet of the first filtering device 121 to realize the back washing of the first filtering device 121.
After the backwashing of the first filter device 121 is completed, the second filter device 122 is backwashed. During the backwashing of the second filter device 122, the first control valve 15, the second control valve 16 and the fourth control valve 18 are opened, and the third control valve 17, the fifth control valve 19, the sixth control valve 20 and the seventh control valve 21 are closed. After the cleaning water in the cleaning condensed water flash tank 101 is pumped to the cleaning condensed water storage tank 111 by the flash tank pump 13, the cleaning water is pumped by the pump 14 to sequentially pass through the first control valve 15, the second control valve 16 and the first filtering device 121, then the cleaning water enters from the outlet of the second filtering device 122 and is discharged from the inlet of the second filtering device 122, and then is discharged from the forward and reverse washing discharge port 22 by the fourth control valve 18, the cleaning water enters from the outlet of the second filtering device 122, and is discharged from the inlet of the second filtering device 122 to realize the reverse washing of the second filtering device 122.
In the backwashing process, clean water continuously enters the upper part of the sand layer from the bottom of the sand layer of the filtering device 12 to be squeezed and flushed, so that the sand layer continuously rolls, and pollutants accumulated in the filtering process are flushed away.
S13: the filter apparatus 12 is washed.
Specifically, the first filtering device 121 and the second filtering device 122 are subjected to the normal washing at the same time. During the forward washing, the second control valve 16, the fifth control valve 19 and the seventh control valve 21 are opened, and the third control valve 17, the fourth control valve 18 and the sixth control valve 20 are closed. After the cleaning water in the cleaning condensed water flash tank 101 is pumped to the cleaning condensed water storage tank 111 by the flash tank pump 13, the cleaning water is pumped by the pump 14 to pass through the first control valve 15, the second control valve 16 and the fifth control valve 19, respectively enter from the inlets of the first filtering device 121 and the second filtering device 122, and is discharged from the outlets of the first filtering device 121 and the second filtering device 122, and the water discharged from the first filtering device 121 and the second filtering device 122 is discharged from the back-and-forth washing discharge port 22 by the seventh control valve 21, so that the back washing of the first filtering device 121 and the second filtering device 122 is realized.
In this embodiment, after the device performs a period of condensed water filtration, the condensed water recycling device 1 needs to be backwashed and washed. The condensed water filtering time period may be preset to be 12 hours, and in other embodiments, the condensed water filtering time period may also be preset to be 8 hours, 10 hours, 14 hours, and the like, which is not specifically limited herein. The purpose of backwashing and forward washing the first and second filtering devices 121 and 122 is to remove the dirt accumulated in the filtering device 12 and recover the condensed water filtering capability of the filtering device 12, wherein the backwashing order of the first and second filtering devices 121 and 122 is not fixed, and in other embodiments, the second filtering device 122 may be backwashed first, and then the first filtering device 121 may be backwashed, which are all included in the protection scope of the condensed water recycling device 1 of the present invention, and are not limited specifically herein.
The above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all modifications that can be made by using equivalent structures or equivalent principles in the contents of the specification and the drawings or directly or indirectly applied to other related technical fields are also included in the scope of the present application.
Claims (10)
1. A condensed water recycling apparatus, characterized in that the condensed water recycling apparatus comprises:
a flash tank;
the storage tank comprises a clean condensed water storage tank and a middle condensed water storage tank, and an outlet of the flash tank is communicated with an inlet of the clean condensed water storage tank through a pipeline;
the filter device comprises a first filter device and a second filter device, wherein the inlet of the first filter device is communicated with the inlet of the second filter device through a pipeline, and the outlet of the first filter device is connected with the inlet of the middle condensed water storage tank through a pipeline.
2. The condensate water recycling apparatus according to claim 1,
the flash tank comprises a clean condensate flash tank, a middle condensate flash tank and a heavy sewage condensate flash tank; the outlet of the clean condensed water flash tank, the outlet of the middle condensed water flash tank and the outlet of the heavy sewage condensed water flash tank are connected with the inlet of the clean condensed water storage tank through pipelines.
3. The condensate water recycling apparatus according to claim 2,
and a flash tank pump is also arranged on a pipeline communicated between the flash tank and the clean condensed water storage tank.
4. The condensate water recycling apparatus according to claim 3,
and a suction pump is also arranged on a pipeline communicated between the clean condensed water storage tank and the filtering device.
5. The apparatus for recycling condensed water according to claim 4, further comprising:
the first control valve is arranged on a pipeline between the extraction pump and the filtering device.
6. The apparatus for recycling condensed water according to claim 5, further comprising:
the second control valve is close to the first filtering device and arranged on a pipeline between the first control valve and the first filtering device, and the fifth control valve is close to the second filtering device and arranged on a pipeline between the first control valve and the second filtering device.
7. The apparatus for recycling condensed water according to claim 6, further comprising:
the third control valve is connected with the second control valve and the pipeline between the first filtering devices through a pipeline, the fourth control valve is connected with the fifth control valve and the pipeline between the second filtering devices through a pipeline, and the third control valve is connected with the fourth control valve through a pipeline.
8. The apparatus for recycling condensed water according to claim 1, further comprising:
and the sixth control valve is arranged close to the middle condensed water storage tank and is positioned on a pipeline connected with an inlet of the middle condensed water storage tank.
9. The condensate water recycling apparatus according to claim 7,
the outlet of the first filtering device and the outlet of the second filtering device are further connected with one end of a seventh control valve through a pipeline, the other end of the seventh control valve is connected with a forward and reverse washing discharge port through a pipeline, and a pipeline between the seventh control valve and the forward and reverse washing discharge port is connected with a pipeline between the third control valve and the fourth control valve through a pipeline.
10. Pulping equipment in a papermaking process is characterized by comprising a pulping workshop and condensed water recycling equipment, wherein the condensed water recycling equipment is the condensed water recycling equipment in any one of claims 1 to 9;
the pulping workshop comprises a condensed water injection port, the condensed water injection port is connected with a middle condensed water storage tank of condensed water recycling equipment through a pipeline, and a delivery pump is further arranged on the pipeline between the condensed water injection port and the middle condensed water storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122634606.9U CN216687783U (en) | 2021-10-29 | 2021-10-29 | Condensed water recycling device and pulping device in papermaking process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122634606.9U CN216687783U (en) | 2021-10-29 | 2021-10-29 | Condensed water recycling device and pulping device in papermaking process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216687783U true CN216687783U (en) | 2022-06-07 |
Family
ID=81830177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122634606.9U Active CN216687783U (en) | 2021-10-29 | 2021-10-29 | Condensed water recycling device and pulping device in papermaking process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216687783U (en) |
-
2021
- 2021-10-29 CN CN202122634606.9U patent/CN216687783U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216687783U (en) | Condensed water recycling device and pulping device in papermaking process | |
| CN107265568A (en) | A kind of circulating filtration sewage water treatment method capable of washing | |
| CN212236750U (en) | Double-membrane-group filtering device | |
| CN213347942U (en) | Filtering device of rainwater irrigation system | |
| CN212055352U (en) | Self-cleaning formula circulating filtration system | |
| CN210340418U (en) | Resin bed leaks resin detection device | |
| CN111644069A (en) | Efficient backwashing intelligent filter and backwashing method thereof | |
| CN208898622U (en) | A kind of ultrafiltration membrane decoloration component | |
| CN214158728U (en) | Resin trapper with prevent blockking up effect | |
| CN207795555U (en) | A kind of pump entry strainer | |
| CN211864116U (en) | Backwashing system of industrial water filter | |
| CN213361103U (en) | Inner chamber clearance type valve | |
| CN212236763U (en) | High-efficient backwash intelligent filter | |
| CN213707829U (en) | Ceramic membrane water purifier with pressure barrel | |
| CN214719052U (en) | Descaling circulating pipe for reduction denitration | |
| CN212833625U (en) | Oil-water impurity purifying device for finished product | |
| CN216537345U (en) | Water tank goes out water edulcoration device | |
| CN217323618U (en) | Filter device | |
| CN218573028U (en) | Electrolyte filtering pipeline and system | |
| CN212417563U (en) | Water purifying device | |
| CN207792855U (en) | A kind of reverse osmosis unit being used to prepare production pure water | |
| CN210358431U (en) | Cleaning system for cleaning machine | |
| CN217410028U (en) | Low-loss water filtering device | |
| CN109157910A (en) | self-cleaning reverse osmosis treatment device | |
| CN220224596U (en) | Textile pretreatment spraying equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |