CN215208811U - Paint spraying wastewater treatment recycling system - Google Patents
Paint spraying wastewater treatment recycling system Download PDFInfo
- Publication number
- CN215208811U CN215208811U CN202121490992.2U CN202121490992U CN215208811U CN 215208811 U CN215208811 U CN 215208811U CN 202121490992 U CN202121490992 U CN 202121490992U CN 215208811 U CN215208811 U CN 215208811U
- Authority
- CN
- China
- Prior art keywords
- extraction
- paint spraying
- filter
- storage tank
- recycling system
- 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
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a paint spraying wastewater treatment recycling system, which comprises a paint spraying wastewater storage tank, a first filter, a second filter, a decoloring device, an extraction/separation device, a water-based solution and extractant mixing storage tank, a back extraction device, a water-based solution storage tank and a membrane concentration device, and then the water-based solution and the extractant mixing storage tank are reused for production; the extractant recovered by the back extraction device is stored in an extractant storage tank for cyclic utilization; the residual liquid generated by the extraction/separation device is stored in the residual liquid storage tank after extraction/separation, and then enters the biochemical device and the advanced oxidation device for treatment and then is discharged after reaching the standard. The utility model provides a processing recycling system who optimizes handles the waste water that sprays paint that discharges away to the automobile manufacturing factory, through setting up processes such as reextraction, membrane concentration, has greatly improved the purity of reuse water nature solvent for adopt after the aqueous solution fluid infusion cyclic utilization after handling, automobile paint spraying technology operation still can normal operating, does not influence the quality effect that sprays paint.
Description
Technical Field
The utility model relates to a waste water treatment technical field, especially a waste water treatment recycling system sprays paint.
Background
At present, the automobile paint spraying production line mainly adopts water paint, and the produced paint spraying waste water is a solution which takes ether mass percent of about 5-15% as a main component (such as ethylene glycol butyl ether and/or diethylene glycol butyl ether), contains about 1% of small amount of alcohol and amine mass, about 0.1-0.5% of salt mass and about 83.9-93.9% of water mass. COD in the wastewaterCrHigh content, CODCrAbout 400000-1500000 mg/L. The paint spraying wastewater has high treatment difficulty due to the characteristics of high organic matter concentration, complex components, certain volatility and the like. In recent years, the use of water-based paint and solvents in the paint spraying field of the industrial manufacturing industry is increased, the wastewater is difficult to treat and is mostly treated as hazardous waste, the operation cost of enterprises is increased, and the volatile gas causes great pollution to the atmosphere. Therefore, the search for a more economical and sustainable method for treating the paint spraying wastewater is a necessary and urgent need of the environmental protection industry.
The characteristics to the waste water that sprays paint, the utility model provides a waste water treatment recycling system sprays paint for useful components in the waste water that sprays paint is higher like ethylene glycol butyl ether or/and diethylene glycol butyl ether or ether rate of recovery and recovery back purity, and the maximize is recycled for production, and remaining incomplete residual liquid is up to standard after handling and is discharged, reaches better social, economic benefits, ecological benefits.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to make up the deficiencies existing in the prior art, the utility model provides a paint spraying wastewater treatment recycling system.
The utility model provides a technical scheme as follows:
the utility model discloses carry out advanced treatment and recycle in production or workshop washing etc. to the waste water that sprays paint, after the waterborne solvent after handling washs water as production line moisturizing and workshop, the production line system still can normal operating, can guarantee the manufacturing effect of product and the clean effect of washing in workshop.
In order to achieve the above and other related objects, the present invention provides a paint spraying wastewater treatment and recycling system, which comprises a paint spraying wastewater storage tank, a first filter, a second filter, a decoloring device, an extraction/separation device, a water-based solution and extractant mixing storage tank, a back extraction device, a water-based solution storage tank, and a membrane concentration device, which are sequentially in fluid communication; wherein the back extraction unit is further in fluid communication with the extraction/separation unit via an extractant sump; the membrane concentration unit is also in fluid communication with the back extraction unit via a pure water sump; the extraction/separation device is also sequentially communicated with the post-extraction/separation residual liquid storage tank, the biochemical device and the advanced oxidation device.
The main treatment object of the utility model is the solution which takes the ether mass accounting for about 5 percent to 15 percent as the main component (such as ethylene glycol butyl ether and/or diethylene glycol butyl ether), and contains about 1 percent of a small amount of alcohols and amines, about 0.1 percent to 0.5 percent of salt mass and about 83.9 percent to 93.9 percent of water mass. COD in the wastewaterCrHigh content, CODCrAbout 400000-1500000 mg/L, high difficulty in wastewater treatment and requirement for reuse water only by advanced treatment. The utility model removes large particle impurities in the paint spraying wastewater by arranging the first filter and the second filter, and protects the subsequent processing unit device and components; the arranged decoloring device can generate decoloring and deodorizing effects on the paint spraying wastewater; the extraction/separation device can extract and separate the aqueous solvent from the wastewater; then collecting the aqueous solvent and the extracting agent through a mixing storage tank of the aqueous solution and the extracting agent; obtaining aqueous solution containing aqueous solvent and extractant by a back-extraction device, collecting the aqueous solution containing aqueous solvent to an aqueous solution storage tank, obtaining high-purity aqueous solvent concentrated solution by a membrane concentration device, directly reusing the concentrated solution for production, reusing penetrating fluid generated by membrane concentration to the back-extraction device by a pure water storage tank, collecting the extractant obtained by back-extraction to an extractant storage tank, reusing the extractant in an extraction/separation device, collecting residual liquid after extraction/separationThe residual liquid is conveyed to a biochemical device and an advanced oxidation device for treatment and then is discharged after reaching the standard. The utility model provides a but the equal cyclic utilization of the effluent treatment recycling system extractant that sprays paint and membrane concentration penetrant practice thrift the treatment cost, extraction/separation back residual liquid is direct discharges up to standard after biochemical device and advanced oxidation unit handle, does not have secondary pollution, and the production can directly be used back in to the gained concentrate, realizes resource utilization.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a water solution concentration and the index of the waste water treatment recycling system that sprays paint to the waste water treatment back retrieval and utilization of spraying paint can reach the clean usefulness of washing in fluid infusion water quality requirement and the workshop of the production line that sprays paint for production line system cyclic utilization can guarantee the good operation of the production line that sprays paint, has guaranteed the required quality of products, has practiced thrift the operation cost of enterprise greatly.
2. The utility model provides a waste water treatment recycling system sprays paint is to the characteristics of the waste water that sprays paint, through each step in coordination for suspended solid, salt etc. contained in the waste water that sprays paint get rid of thoroughly, through reextraction device and membrane enrichment facility's reasonable setting, the extraction rate of recovery of ethylene glycol butyl ether or/and diethylene glycol butyl ether reaches 97% in the waste water that sprays paint after the processing, greatly improved the purity of reuse water nature solvent, reduce the useless handling capacity of danger in the at utmost, compare before handling, CODCrThe removal rate is about 97 percent, the utility model discloses simple process, efficient, no secondary pollution, low cost, furthest reduced the influence of the emission of industrial waste water to the environment.
Drawings
FIG. 1 is a diagram of the system for treating and recycling paint spraying wastewater. Wherein, the 010-paint spraying waste water storage tank; 020-first filter; 030-a second filter; 040-a decolorizing device; 050-extraction/separation means; 060-aqueous solution and extractant mixing tank; 070-a back extraction device; 080-extractant storage tank; 090-a reservoir for aqueous solution; 100-membrane concentration unit; 110-a pure water storage tank; 120-a tank for the residual liquid after extraction/separation; 130-a biochemical device; 140-advanced oxidation unit.
Detailed Description
A paint spraying wastewater treatment and recycling system, as shown in fig. 1, comprising a paint spraying wastewater storage tank 010, a first filter 020, a second filter 030, a decoloring device 040, an extraction/separation device 050, an aqueous solution and extractant mixing storage tank 060, a back extraction device 070, an aqueous solution storage tank 090 and a membrane concentration device 100 which are sequentially in fluid communication; wherein the back extraction apparatus 070 is also in fluid communication with the extraction/separation apparatus 050 via an extractant sump 080; the membrane concentration unit 100 is also in fluid communication with the back-extraction unit 070 via a pure water reservoir 110; the extraction/separation device 050 is also in fluid communication with the post extraction/separation raffinate reservoir 120, the biochemical device 130, and the advanced oxidation device 140, in that order.
In a preferred embodiment of the present invention, the paint spraying waste water storage tank 010 is a conical bottom or inclined bottom storage tank.
In a preferred embodiment of the present invention, the first filter 020 is any one of a cartridge filter, a bag filter, or a pleated cartridge filter; in some preferred embodiments of the present invention, the first filter 020 has a filter fineness of 5um to 100um, preferably 5um to 30 um.
In a preferred embodiment of the present invention, the second filter 030 is a lamination filter, a bag filter, a cartridge filter or an ultrafiltration filter; in some preferred embodiments of the present invention, the second filter 030 has a filtering precision of 0.1um to 100um, preferably 0.1 um.
In a preferred embodiment of the present invention, the decoloring device 040 is a membrane filtration device, an adsorption device, or a distillation device. In some preferred embodiments of the present invention, the membrane filtration material used in the membrane filtration device is an ultrafiltration membrane incompatible with the aqueous solvent in the paint spraying wastewater, and is selected from one of polyethersulfone, nylon, PVDF (polyvinylidene fluoride), ceramic, metal, glass, molecular sieve and graphene oxide; the adsorption device is an activated carbon or resin adsorption device; the distillation device is a normal-temperature or low-temperature evaporation device.
In a preferred embodiment of the present invention, the extraction/separation device 050 is a multi-stage counter-current extraction device or a multi-stage oil-water separation device; in some preferred embodiments of the present invention, the device further comprises an extractant feeding device for feeding the extractant to the extraction/separation device.
In a preferred embodiment of the present invention, the aqueous solution and extractant mixing tank 060 may be configured as a gas leakage prevention device and a negative pressure prevention tank, which improves the system's ability to cope with load impacts and safety.
In a preferred embodiment of the present invention, the back extraction device 070 is a multi-stage counter-current extraction device or a multi-stage oil-water separation device.
In a preferred embodiment of the present invention, the membrane concentration device 100 is a reverse osmosis membrane concentration device; in some preferred embodiments of the present invention, the membrane concentration unit is a high pressure RO membrane reverse osmosis unit or a DTRO reverse osmosis membrane unit; the reverse osmosis membrane concentration device performs separation and concentration at normal temperature, and has low energy consumption and low operating cost. In some preferred embodiments of the present invention, the filtration precision of the membrane concentration device 100 is 0.5 to 100nm, preferably 0.5 to 50 nm; when the filtration precision is within the range of 0.5-50 nm, the high interception rate can be ensured, and the water flux is high.
In the preferred embodiment of the present invention, the biochemical device 130 is A2O-MBR membrane bioreactor or A2O + coagulating sedimentation treatment device; in some preferred embodiments of the present invention, the device further comprises a nutrient adding device for adding the nutrient to the biochemical device 130. In some preferred embodiments of the present invention, the device further comprises a sludge dewatering device, and the biochemical device 130 is communicated with the sludge dewatering device, and is used for dewatering the sludge generated by the biochemical device 130, so as to facilitate subsequent treatment.
In the preferred embodiment of the present invention, the advanced oxidation device 140 is a combination of ozone advanced oxidation, electrocatalytic oxidation, fenton advanced oxidation, or iron-carbon micro-degradation and fenton reaction system. Through combining ozone advanced oxidation, electrocatalytic oxidation, Fenton advanced oxidation or iron-carbon micro-degradation and Fenton reaction system, can get rid of all kinds of difficult degradation organic pollutants more thoroughly, improve a water CODcr clearance for it can direct discharge to reach standard to go out water, stops secondary pollution.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
Examples
The paint spraying wastewater produced by the automobile paint spraying production line of certain automobile manufacturing factory in China: the yield is about 2000m3A, mainly using a solution with the mass ratio of ethers of about 5-15% as a main component (such as ethylene glycol butyl ether and/or diethylene glycol butyl ether), and containing about 1% of small amount of alcohols and amines, about 0.1-0.5% of salt and about 83.9-93.9% of water; COD in the wastewaterCrHigh content, CODCrAbout 400000-1500000 mg/L; COD in the wastewaterCrHigh content, CODCrAbout 400000-1500000 mg/L; there is a paint color present. The wastewater treatment difficulty is high, the requirement of recycling and supplementing the aqueous solvent can be met only by advanced treatment, the recycled solvent is used for cyclic utilization of a production line system, the enterprise operation cost is saved, and the influence of the discharge of industrial wastewater on the environment is reduced to the maximum extent.
The treatment capacity of the paint spraying wastewater treatment recycling system is about 2000m3The year, as shown in fig. 1, includes a paint spraying waste water storage tank 010, a first filter 020, a second filter 030, a decoloring device 040, an extraction/separation device 050, an aqueous solution and extractant mixing tank 060, a back extraction device 070, an aqueous solution storage tank 090, a membrane concentration device 100, which are in fluid communication in this order; wherein the back extraction apparatus 070 is also in fluid communication with the extraction/separation apparatus 050 via an extractant sump 080; the membrane concentration unit 100 is also in fluid communication with the back-extraction unit 070 via a pure water reservoir 110; the extraction/separation device 050 is also sequentially connected with the extraction/separation deviceThe raffinate sump 120, biochemical unit 130 and advanced oxidation unit 140 are in fluid communication.
The paint spraying wastewater treatment and recycling system is shown in figure 1. The paint spraying wastewater is collected by a workshop wastewater storage tank and then is conveyed by a water pump, the paint spraying wastewater is transferred into a paint spraying wastewater storage tank 010 of a paint spraying wastewater treatment and recycling system, 2 water lifting pumps are arranged behind the paint spraying wastewater storage tank 010, 1 water lifting pump is used for 1 water lifting pump, and the flow of each water pump is 0.5m3H is used as the reference value. Conveying the paint spraying wastewater to a first filter 020 by a water lifting pump, filtering the paint spraying wastewater, then, allowing the paint spraying wastewater to enter a second filter 030 for filtering treatment, and then, allowing the paint spraying wastewater to enter a decoloring device 040 for decoloring treatment, wherein the decoloring device 040 is a graphene oxide membrane filtering device, the decoloring rate is about 100%, the effluent of the decoloring device 040 enters a multistage countercurrent extraction device or a multistage oil-water separation tank 050 for extraction and separation treatment, and an aqueous solvent is extracted and separated from the wastewater, wherein an extracting agent is n-hexane, and the mass ratio of the extracting agent to a water body entering the multistage countercurrent extraction device or the multistage oil-water separation tank 050 is 1: 1-1.2: 1; the extraction device is a four-stage countercurrent extraction device, and the treatment capacity is 0.5m3H; the aqueous solution generated by the separation and extraction treatment enters a mixed storage tank 060 for storing the aqueous solution and the extracting agent; the residual liquid generated by the separation and extraction treatment enters an extraction/separated residual liquid storage tank 120 for storage; arranging 2 lifting pumps (1 is spare 1) behind a mixed storage tank 060 of the aqueous solution and the extractant, conveying the aqueous solvent into an aqueous solution storage tank 090 for storage after extraction treatment by a back extraction device 070, arranging 2 lifting pumps (1 is spare 1) behind the aqueous solution storage tank 090, carrying out concentration treatment on an aqueous solution conveying membrane concentration device 100, and conveying the concentrated solution to a workshop aqueous paint spraying production line for use; the produced permeate enters a pure water storage tank 110 for storage and is used as a stripping agent; 2 lifting pumps (1 is used for 1) are arranged behind the residual liquid storage tank 120 after extraction/separation, and residual liquid is sent to the biochemical device 130 and the advanced oxidation device 140 for treatment and then is discharged after reaching the standard. Sludge generated in the biochemical treatment process of the biochemical device 130 is dewatered, the sludge can be placed in a sludge tank, and then is conveyed into a sludge dewatering machine for dewatering after being added with chemicals through a sludge conditioning and dosing device.
The main equipment involved in the paint spraying wastewater treatment and recycling system in this example is summarized in table 1 below.
TABLE 1 Main units involved in the paint spraying wastewater treatment and recycling system
After the paint spraying wastewater treatment and recycling system is put into operation, the effluent quality is stable and no color exists, and the main indexes are as follows 2:
table 2: index of water quality treatment effect of paint spraying wastewater inlet and outlet water
COD of the wastewater from the system before and after treatmentCrThe removal rate was about 97%.
The utility model provides a waste water treatment recycling system sprays paint of optimization, carry out advanced treatment and reuse in the washing cleanness of the production line fluid infusion of spraying paint or workshop industrial equipment to the waste water that sprays paint and use, through setting up reextraction and the concentrated process of membrane, the purity of reuse water nature solvent has greatly been improved, reduce the useless amount of disposition of danger to the at utmost, in order to reach energy saving and emission reduction's purpose, the production effect of product and the cleaning performance such as industrial equipment in the workshop have been guaranteed, win splendid quality reputation for the customer, good economic benefits has been gained, social, ecological benefits.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. The paint spraying wastewater treatment and recycling system is characterized by comprising a paint spraying wastewater storage tank (010), a first filter (020), a second filter (030), a decoloring device (040), an extraction/separation device (050), an aqueous solution and extractant mixing storage tank (060), a back extraction device (070), an aqueous solution storage tank (090) and a membrane concentration device (100) which are sequentially in fluid communication; wherein the back-extraction device (070) is further in fluid communication with the extraction/separation device (050) via an extractant sump (080); the membrane concentration unit (100) is also in fluid communication with the back-extraction unit (070) via a pure water sump (110); the extraction/separation device (050) is also in fluid communication with the post-extraction/separation raffinate tank (120), the biochemical device (130), and the advanced oxidation device (140), in that order.
2. The paint spraying wastewater treatment and recycling system according to claim 1, further comprising at least one of the following technical features:
1) the paint spraying waste water storage tank (010) is a storage tank with a conical bottom or an inclined bottom;
2) the first filter (020) is a laminated filter, a bag filter or a filter element filter;
3) the second filter (030) is a laminated filter, a bag filter, a filter element filter or an ultrafiltration filter;
4) the decolorization device (040) is a membrane filtration device, an adsorption device or a distillation device;
5) the extraction/separation device (050) is a multi-stage countercurrent extraction device or a multi-stage oil-water separation device;
6) the back extraction device (070) is a multi-stage countercurrent extraction device or a multi-stage oil-water separation device;
7) the membrane concentration device (100) is a reverse osmosis membrane separation device;
8) the biochemical device (130) is an A2O-MBR membrane bioreactor or an A2O + coagulating sedimentation treatment device;
9) the paint spraying wastewater treatment and recycling system also comprises a nutrient adding device which is used for adding a nutrient to the biochemical device;
10) the advanced oxidation device (140) is a combination of ozone advanced oxidation, Fenton advanced oxidation or iron-carbon micro-degradation and Fenton reaction systems;
11) the extraction/separation device is characterized by also comprising an extractant adding device which is used for adding an extractant into the extraction/separation device (050);
12) the paint spraying wastewater treatment and recycling system further comprises a sludge dewatering device, and the biochemical device (130) is communicated with the sludge dewatering device and is used for dewatering sludge generated by the biochemical device.
3. The paint spraying wastewater treatment and recycling system according to claim 2, wherein in the characteristic 2), the first filter (020) has a filtering precision of 5um-100 um.
4. The paint spraying wastewater treatment and recycling system according to claim 2, wherein in the characteristic 3), the second filter (030) has a filtering precision of 0.1 to 100 um.
5. The paint spraying wastewater treatment and recycling system according to claim 2, wherein in the characteristic 7), the membrane concentration device (100) is a high pressure RO membrane reverse osmosis device or a DTRO reverse osmosis membrane device.
6. The paint spraying wastewater treatment and recycling system according to claim 2, wherein in the characteristic 7), the filtration precision of the membrane concentration device (100) is 0.5-100 nm.
7. The paint spraying wastewater treatment and recycling system according to claim 2, wherein in the step 4), the membrane filtration material used by the membrane filtration device is an ultrafiltration membrane incompatible with a water solvent in the paint spraying wastewater, and is selected from one of polyethersulfone, nylon, PVDF, ceramics, metal, glass, molecular sieves and graphene oxide; the adsorption device is an activated carbon or resin adsorption device; the distillation device is a normal-temperature or low-temperature evaporation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121490992.2U CN215208811U (en) | 2021-07-01 | 2021-07-01 | Paint spraying wastewater treatment recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121490992.2U CN215208811U (en) | 2021-07-01 | 2021-07-01 | Paint spraying wastewater treatment recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215208811U true CN215208811U (en) | 2021-12-17 |
Family
ID=79432470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121490992.2U Active CN215208811U (en) | 2021-07-01 | 2021-07-01 | Paint spraying wastewater treatment recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215208811U (en) |
-
2021
- 2021-07-01 CN CN202121490992.2U patent/CN215208811U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111807617A (en) | Water-based paint waste liquid treatment and recycling system and method | |
| CN101254985B (en) | PTA refined mother liquor reclaiming method and system | |
| CN109761386B (en) | Water paint washs useless solvent processing apparatus | |
| CN104609605A (en) | Device and method for realizing printing and dyeing dyed wastewater reuse and dye recovery | |
| CN102993039A (en) | Method for recovering dimethyl acetamide in polyether sulfone spinning wastewater | |
| CN201793456U (en) | Oily sewage treatment system | |
| CN105712302A (en) | System and method for recycling sulfuric acid of waste lead storage batteries | |
| CN113354126A (en) | Paint spraying wastewater recycling system and treatment and recycling method | |
| CN215208811U (en) | Paint spraying wastewater treatment recycling system | |
| CN210030202U (en) | Water paint washs useless solvent processing apparatus | |
| CN210457852U (en) | Automobile parts finished product and/or raw and other materials wash waste water treatment recycling system | |
| CN105585212B (en) | A kind of PTA produces waste water method for reusing synthesized | |
| CN101585514A (en) | Method for reclaiming sulfuric acid from liquid-phase catalytic oxidation-biological method flue gas desulfurization by-product dilute acid solution by adopting film technology | |
| CN216129446U (en) | Industrial waste acid recycling and purifying system | |
| CN106865696B (en) | High-temperature high-salinity oil extraction wastewater recycling method based on combined membrane process | |
| CN212924740U (en) | Water paint waste liquid treatment recycling system | |
| CN205953785U (en) | High -concentration organic wastewater treatment device | |
| CN213141738U (en) | Washing waste liquid and waste emulsion treatment and recycling system | |
| CN210367323U (en) | High concentration industry organic waste water zero release processing system | |
| CN210065340U (en) | System for high concentration COD waste water resourceful treatment | |
| CN211004887U (en) | Waste incineration power plant waste water processing system | |
| CN203429005U (en) | Device for recycling catalysts and process water from PTA (Pure Terephthalic Acid) refined mother solution | |
| CN113480412A (en) | Method for recovering phenol in alkylphenol production wastewater | |
| CN106430705A (en) | Electroplating wastewater reverse osmosis concentrated liquor treatment process and special device thereof | |
| CN111499070A (en) | Oil-containing emulsified waste liquid reduction treatment system and treatment method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |