CN206724166U - One kind classification combustion gas low NO - Google Patents
One kind classification combustion gas low NO Download PDFInfo
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- CN206724166U CN206724166U CN201720487549.7U CN201720487549U CN206724166U CN 206724166 U CN206724166 U CN 206724166U CN 201720487549 U CN201720487549 U CN 201720487549U CN 206724166 U CN206724166 U CN 206724166U
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- fuel nozzle
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Abstract
The utility model discloses one kind to be classified combustion gas low NO, belongs to burner arts.The classification combustion gas low NO includes：Distributor, flow path, including body and multiple fuel nozzles are provided for the combustion gas and air, combustion gas sprays in fuel nozzle punishment level；Ignitor；Burner shell；Fire tube, it is fixedly connected with one end of burner shell, the burner shell, the fire tube are arranged in order and are formed at the outside of the distributor and the ignitor by the air-flow direction, and mixing and burning place are provided for combustion gas and air；And baffle plate, it is removably attachable on the inside of the fire tube, by the combustion gas sprayed described in the baffle at fuel nozzle, so that the combustion gas uniformly mixes with the air.The utility model on the inside of fire tube by setting a baffle plate so that the combustion gas short stay at baffle plate sprayed at fuel nozzle so that combustion gas and air mixing are more uniform, so as to reduce the generation of nitrogen oxides.
Description
Technical field
Burner arts are the utility model is related to, combustion gas low NO is classified more particularly to one kind.
Background technology
One of the arch-criminal of nitrogen oxides as atmosphere pollution, discharge limitation of the country to nitrogen oxides constantly become tight, therefore,
Relevant criterion has been formulated in discharge of the China to boiler atmosphere pollution, and the low nitrogen transformation to boiler is very urgent.
The type of combustion apparatus and burner is one of NOx factor for influenceing boiler emission.Some existing low nitrogen combustions
Burner, mainly based on burning classification, bias combustion, but fuel and air unreasonable distribution, incomplete combustion is often resulted in,
The problems such as combustion instability, efficiency of combustion is low, and NOx emission is unsatisfactory for environmental requirement.
Utility model content
The purpose of this utility model is to provide a kind of classification combustion gas low NO, nitrogen oxygen when can effectively reduce fuel gas buring
The generation of compound.
Especially, the utility model provides a kind of classification combustion gas low NO, including：
Distributor, flow path is provided for the combustion gas and air, including：
Body, it is that it is interlayer that it is outside, inside is hollow bulb with cylinder with dissection, by described in interlayer aggregation
Combustion gas, formed with fuel gas inlet at the interlayer, the top of the interlayer formed with spaced apart multiple combustion gas distribution cavitys,
Multiple fuel nozzles, and the multiple combustion gas distribution cavity corresponds and docking connection, each corresponding combustion gas
The corresponding fuel gas flow path that distribution cavity is formed with fuel nozzle, the combustion gas are flowed in corresponding fuel gas flow path
And sprayed in corresponding fuel nozzle punishment level,
Wherein, the space that the hollow bulb, the multiple fuel nozzle surround is collectively forming inlet air flow path；
Ignitor, it is the gas ignition on the outside of the fuel nozzle；
Burner shell, it is hollow cylinder；
Fire tube, it is fixedly connected with one end of the burner shell, the burner shell and the fire tube press the sky
Flow of air direction is arranged in order and is formed at the outside of the distributor and the ignitor, and mixing is provided for combustion gas and air
And burning place；And
Baffle plate, it is removably attachable on the inside of the fire tube, passes through what is sprayed described in the baffle at fuel nozzle
The combustion gas, so that the combustion gas uniformly mixes with the air.
Further, the classification combustion gas low NO also includes flow guiding disc, positioned at going out for the inlet air flow path
At mouthful, make to form Rotating with Uniform air-flow by the air of the flow guiding disc.
Further, the flow guiding disc includes：
Shell body, it is the hollow cylinder of both ends open, one end is entrance point, the other end is the port of export, and the air is by institute
State after entrance point enters and flowed out by the port of export；
Multiple guide vanes, one end is arranged at the inwall of the shell body in identical predetermined angle, compartment of terrain, another
End is collectively forming cavity, and space is formed between any two guide vane, makes to form rotary pneumatic by the air in the space
Stream；
Inner housing, it is hollow cylinder, its outside is connected at the cavity with the multiple guide vane；
Closed plate, be arranged at the cavity, the closed plate be connected to the inner side of the inner housing and with the inner casing
The inner side of body forms gap；With
Support frame, one end are fixed with the shell body, and the other end is fixedly connected with the fuel nozzle, pass through the support
The shell body is fixedly mounted at the fuel nozzle by frame.
Further, each fuel nozzle has relative first end and the second end, and the first end is opening
End and with corresponding combustion gas distribution cavity docking, the second end be blind end, close described second in the fuel nozzle
The one-level spout and two level spout with fuel nozzle insertion are sequentially provided with along the air-flow direction at the tube wall of end,
The one-level spout is sprayed towards the burner shell, the two level spout towards the axle center of the body by the one-level
Mouth sprays one-level combustion gas, passes through the two level spout and sprays second gas burning.
Further, the one-level spout is circular tube shaped and protrudes from the tube wall of the fuel nozzle, the one-level spray
The central axis of mouth is in the center line of the fuel nozzle.
Further, the firing tip of the ignitor is close to one-level nozzle one of them described.
Further, the fire tube is in enlarging shape along the air-flow direction, including：
Fire tube cylindrical shell, its one end are fixedly connected on the burner shell；With
Fire tube cone shell, the small one end of its diameter are connected with the other end of the fire tube cylindrical shell.
Further, one end of the fire tube cylindrical shell of the fire tube is provided with multiple first mounting holes, and fastener is worn
Cross every one first mounting hole to be fixedly linked with the burner shell, the fire tube cylindrical shell is close to the fire tube cone shell
Surface be provided with multiple second mounting holes.
Further, the baffle plate includes：
Baffle plate cylindrical shell, its one end are fixedly connected on the fire tube；With
Boss, in annular shape, the inner side of the baffle plate cylindrical shell other end is raised in, and the boss is positioned at described
Multiple one-level spouts are along at the downstream of air flow, to stop the combustion gas of the multiple one-level nozzle.
Further, the baffle plate is located at the fire tube cylindrical shell and fire tube cone shell junction, the baffle plate circle
The surface of post housing is provided with the 3rd mounting hole, and fastener is through second mounting hole and the 3rd mounting hole, by described in
Baffle plate is fixedly connected on the fire tube.
Classification combustion gas low NO of the present utility model, by setting a dismountable baffle plate on the inside of fire tube, from combustion
When expecting on fuel gas injection to the tube wall of the fire tube that jet pipe sprays, due to the stop of baffle plate, the combustion gas is forced in the gear
There is short stay at plate so that combustion gas and air mixing are more uniform, so as to stablize flame, also reduce the life of nitrogen oxides
Into.
Further, the classification combustion gas low NO of the present embodiment in the exit of the inlet air flow path by setting
Flow guiding disc is put so that the air for flowing through the flow guiding disc gap forms swirling eddy, the swirling eddy and the two level spout
The multiply combustion gas thread mixing of ejection, enhances air and combustion gas mixing, shortening flue gas by the eddy flow of the flow guiding disc exists
The residence time of high-temperature region, the temperature of combustion flame is advantageously reduced, the production of nitrogen oxides when further effectively reducing burning
It is raw.
According to the accompanying drawings will be more to the detailed description of the utility model specific embodiment, those skilled in the art
Add clear of the present utility model above-mentioned and other purposes, advantages and features.
Brief description of the drawings
It is described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter more of the present utility model specific real
Apply example.Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that
What these accompanying drawings were not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the sectional view according to the classification combustion gas low NO of the utility model one embodiment；
Fig. 2 is the classification combustion gas low NO according to the utility model one embodiment without burner shell, fire tube
And the right view of baffle plate；
Fig. 3 is to be classified solid of the combustion gas low NO without burner shell according to the utility model one embodiment
Figure；
Fig. 4 be according to the utility model one embodiment classification combustion gas low NO without burner shell, fire
The stereogram of pipe and baffle plate；
Fig. 5 is stood according to the assembling of the fire tube and baffle plate of the classification combustion gas low NO of the utility model one embodiment
Body figure；
Fig. 6 is the stereogram according to the baffle plate of the classification combustion gas low NO of the utility model one embodiment；
Fig. 7 is the front view according to the flow guiding disc of the classification combustion gas low NO of the utility model one embodiment；
Fig. 8 is the right view according to the flow guiding disc of the classification combustion gas low NO of the utility model one embodiment.
Embodiment
Fig. 1 is the sectional view according to the classification combustion gas low NO of the utility model one embodiment.Fig. 2 is according to this
Right view of the utility model one embodiment without the classification combustion gas low NO of burner shell, fire tube and baffle plate.Fig. 3 is
Stereogram according to the classification combustion gas low NO of the utility model one embodiment without burner shell.Fig. 4 is basis
The stereogram without burner shell, fire tube and baffle plate of the classification combustion gas low NO of the utility model one embodiment.
As shown in figure 1, the classification combustion gas low NO includes distributor 10, ignitor 20 (referring to Fig. 2), burning
Device housing 30, fire tube 40 and baffle plate 50.
The distributor 10 includes body 11 and multiple fuel nozzles 12, to provide flowing road for the combustion gas and air
Footpath.The body 11 is the cylinder with interlayer 101, and it is interlayer 101 that it is outside, inside is hollow bulb 102, passes through the interlayer
101 aggregation combustion gas, formed with fuel gas inlet 103 at the interlayer 101, the top of the interlayer 101 is formed with spaced apart
Multiple combustion gas distribute cavity 104.The multiple fuel nozzle 12 and the multiple combustion gas distribution cavity 104 are corresponded and docked
Connection, the corresponding fuel gas flow path that each corresponding combustion gas distribution cavity 104 is formed with fuel nozzle 12, the combustion gas exist
Flow in corresponding fuel gas flow path and sprayed in corresponding fuel nozzle 12 punishment level.Wherein, the hollow bulb 102, institute
State the space that multiple fuel nozzles 12 surround and be collectively forming inlet air flow path.
As shown in Fig. 2 referring also to Fig. 4, the ignitor 20 is the combustion positioned at the outside of fuel nozzle 12
Gas is lighted a fire.The firing tip 201 (referring to Fig. 4) of the ignitor 20 is at one of them described one-level spout 123.
The burner shell 30 is hollow cylinder.One end of the fire tube 40 and the burner shell 30, which is fixed, to be connected
Connect, the burner shell 30 and the fire tube 40 are arranged in order by the air-flow direction and are formed at the distributor 10
And the outside of the ignitor 20, provide mixing and burning place for combustion gas and air.
The baffle plate 50 is removably attachable to the inner side of fire tube 40, stops the fuel nozzle by the baffle plate 50
The combustion gas sprayed at 12, so that the combustion gas uniformly mixes with the air.
In the present embodiment, as shown in figure 4, each fuel nozzle 12 has relative first end 121 and the second end
122, the first end 121 is openend and docked with corresponding combustion gas distribution cavity 104 that 122, second end is envelope
Closed end, in the fuel nozzle 12 at the tube wall of the second end 122 along the air-flow direction be sequentially provided with
The one-level spout 123 and two level spout 124 that the fuel nozzle 12 penetrates, the one-level spout 123 is towards the burner casing
Body 30, the two level spout 124 spray one-level combustion gas by the one-level spout 123, passed through towards the axle center of the body 11
The two level spout 124 sprays second gas burning.The one-level spout 123 is circular tube shaped and protrudes from the fuel nozzle 12
Tube wall, the central axis of the one-level spout 123 is in the center line of the fuel nozzle 12.
Fig. 5 is stood according to the assembling of the fire tube and baffle plate of the classification combustion gas low NO of the utility model one embodiment
Body figure.As shown in figure 5, the fire tube 40 is in enlarging shape along the air-flow direction, including fire tube cylindrical shell 41 and fire tube
Cone shell 42.One end of the fire tube cylindrical shell 41 is fixedly connected on the burner shell 30.The fire tube Conical Shells With
The small one end of the diameter of body 42 is connected with the other end of the fire tube cylindrical shell 41.
One end of the fire tube cylindrical shell 41 of the fire tube 40 is provided with multiple first mounting holes 401, and fastener passes through
Every one first mounting hole 401 is fixedly linked with the burner shell 30, and the fire tube cylindrical shell 41 is justified close to the fire tube
The surface of cone shell 42 is provided with multiple second mounting holes 402.Preferably, every one first mounting hole 401 is long lumbar hole, consequently facilitating
The installation and regulation of fastener.
Fig. 6 is the stereogram according to the baffle plate of the classification combustion gas low NO of the utility model one embodiment.Such as Fig. 6
Shown, the baffle plate 50 includes baffle plate cylindrical shell 51 and boss 52.One end of the baffle plate cylindrical shell 51 is fixedly connected on
The fire tube 40.The boss 52 is in annular shape, is raised in the inner side of the other end of baffle plate cylindrical shell 51.It is and described convex
Platform 52 is located at the multiple one-level spout 123 along at the downstream of air flow, to stop the institute at the multiple one-level spout 123
State combustion gas.In the present embodiment, the baffle plate 50 is located at the fire tube cylindrical shell 41 and the junction of fire tube cone shell 42, described
The surface of baffle plate cylindrical shell 51 is provided with the 3rd mounting hole 501, and fastener is pacified through second mounting hole 402 and the described 3rd
Hole 501 is filled, the baffle plate 50 is fixedly connected on the fire tube 40.Preferably, every one the 3rd mounting hole 501 is long lumbar hole,
Consequently facilitating the installation and regulation of fastener.
Classification combustion gas low NO of the present utility model sets to obtain optimal combustion gas spouting velocity in the inner side of fire tube 40
A dismountable baffle plate 50 is put, in combustion, when one-level combustion gas is ejected into the tube wall of fire tube 40 by the one-level spout 123
When upper, due to the stop of the boss 52 of the baffle plate 50, the one-level combustion gas was forced to have at the baffle plate 50 of short duration
Stop so that combustion gas and air mixing are more uniform, so as to stablize flame, also reduce the generation of nitrogen oxides.
Fig. 7 is the front view according to the flow guiding disc of the classification combustion gas low NO of the utility model one embodiment.Fig. 8
It is the right view according to the flow guiding disc of the classification combustion gas low NO of the utility model one embodiment.In the another of utility model
In one embodiment, as shown in figure 1, the classification combustion gas low NO also includes flow guiding disc 60, the flow guiding disc 60 is located at
The exit of the inlet air flow path, make to form Rotating with Uniform air-flow by the air of the flow guiding disc 60.As shown in fig. 7,
The flow guiding disc 60 includes shell body 601, multiple guide vanes 602 (referring to Fig. 8), inner housing 603 (referring to Fig. 8), closed plate
604 (referring to Fig. 8) and support frame 605.The shell body 601 is the hollow cylinder of both ends open, and one end is entrance point 606, separately
One end is the port of export 607, and the air is flowed out after being entered by the entrance point 606 by the port of export 607.The multiple guide vane
602 one end is arranged at the inwall of the shell body 601 in identical predetermined angle, compartment of terrain, and the other end is collectively forming sky
Chamber, space is formed between any two guide vane 602, make to form swirling eddy by the air in the space.In described
Housing 603 is hollow cylinder, and its outside is connected at the cavity with the multiple guide vane 602.The closed plate 604 is set
Be placed at the cavity, the closed plate 604 be connected to the inner side of the inner housing 603 and with the inner side of the inner housing 603
Form gap.One end of support frame as described above 605 is fixed with the shell body 601, and the other end and the fuel nozzle 12 are fixed and connected
Connect, the shell body 601 is fixedly mounted at the fuel nozzle 12 by support frame as described above 605.
Based on it is of the present utility model classification combustion gas low NO structure, air by the hollow bulb with it is the multiple
Gap between space, flow guiding disc, two level spout and the flow guiding disc that fuel nozzle 12 surrounds forms three layers of combustion air, according to
Direct current wind, a swirling eddy and gap air centered on secondary difference.The one-level spout and two level spout spray two layers of combustion respectively
Gas.The backlayering time arrangement that three layers of combustion air, two layers of combustion gas and volume are inhaled, so as to reduce in flame temperature and flue gas
The concentration of oxygen, the discharge of nitrogen oxides is effectively reduced, meet existing environmental requirement.
In addition, the classification combustion gas low NO of the present embodiment is led by being set in the exit of the inlet air flow path
Flow table 60 so that the air for flowing through the blade gaps of flow guiding disc 60 forms swirling eddy, and the swirling eddy sprays with the two level
The multiply combustion gas threads mixing that mouth 124 sprays, enhances air and combustion gas mixing, is shortened by the eddy flow of the flow guiding disc 60
Flue gas advantageously reduces the temperature of combustion flame, nitrogen oxidation when further effectively reducing burning in the residence time of high-temperature region
The generation of thing.
So far, although those skilled in the art will appreciate that detailed herein have shown and described of the present utility model show
Example property embodiment, still, still can be according to disclosed in the utility model in the case where not departing from the spirit and scope of the utility model
Content directly determines or derived many other variations or modifications for meeting the utility model principle.Therefore, it is of the present utility model
Scope is understood that and regarded as to cover other all these variations or modifications.
Claims (10)
1. one kind classification combustion gas low NO, including：
Distributor, flow path is provided for the combustion gas and air, including：
Body, it is that it is interlayer that it is outside, inside is hollow bulb with cylinder with dissection, the combustion gas is assembled by the interlayer,
Cavitys are distributed formed with spaced apart multiple combustion gas formed with fuel gas inlet, the top of the interlayer at the interlayer,
Multiple fuel nozzles, and the multiple combustion gas distribution cavity corresponds and docking connection, each corresponding combustion gas distribution
The corresponding fuel gas flow path that cavity is formed with fuel nozzle, the combustion gas flowed in corresponding fuel gas flow path and
Corresponding fuel nozzle punishment level sprays,
Wherein, the space that the hollow bulb, the multiple fuel nozzle surround is collectively forming inlet air flow path；
Ignitor, it is the gas ignition on the outside of the fuel nozzle；
Burner shell, it is hollow cylinder；
Fire tube, it is fixedly connected with one end of the burner shell, the burner shell and the fire tube press the air stream
Dynamic direction is arranged in order and is formed at the outside of the distributor and the ignitor, and mixing and combustion are provided for combustion gas and air
Burn place；And
Baffle plate, it is removably attachable on the inside of the fire tube, described in being sprayed described in the baffle at fuel nozzle
Combustion gas, so that the combustion gas uniformly mixes with the air.
2. classification combustion gas low NO according to claim 1, it is characterised in that the classification combustion gas low NO
Also include flow guiding disc, positioned at the exit of the inlet air flow path, make to form Rotating with Uniform by the air of the flow guiding disc
Air-flow.
3. classification combustion gas low NO according to claim 2, it is characterised in that
The flow guiding disc includes：
Shell body, be both ends open hollow cylinder, one end is entrance point, the other end is the port of export, the air by it is described enter
Flowed out after entering by the port of export at mouth end；
Multiple guide vanes, one end are arranged at the inwall of the shell body in identical predetermined angle, compartment of terrain, and the other end is common
With cavity is formed, space is formed between any two guide vane, makes to form swirling eddy by the air in the space；
Inner housing, it is hollow cylinder, its outside is connected at the cavity with the multiple guide vane；
Closed plate, be arranged at the cavity, the closed plate be connected to the inner side of the inner housing and with the inner housing
Inner side forms gap；With
Support frame, one end are fixed with the shell body, and the other end is fixedly connected with the fuel nozzle, will by support frame as described above
The shell body is fixedly mounted at the fuel nozzle.
4. classification combustion gas low NO according to claim 1, it is characterised in that
Each fuel nozzle has relative a first end and the second end, the first end be openend and with corresponding combustion
Qi leel is docked with cavity, and the second end be blind end, edge at the tube wall of the close the second end in the fuel nozzle
The air-flow direction is sequentially provided with one-level spout and two level spout with fuel nozzle insertion, the one-level spout court
To the burner shell, the two level spout sprays one-level combustion gas towards the axle center of the body, by the one-level spout,
Second gas burning is sprayed by the two level spout.
5. it is according to claim 4 classification combustion gas low NO, it is characterised in that the one-level spout be circular tube shaped simultaneously
And the tube wall of the fuel nozzle is protruded from, the central axis of the one-level spout is in the center line of the fuel nozzle.
6. classification combustion gas low NO according to claim 5, it is characterised in that the firing tip of the ignitor leans on
One of them nearly described one-level nozzle.
7. the classification combustion gas low NO according to any one of claim 1-6, it is characterised in that the fire tube is along institute
It is in enlarging shape to state air-flow direction, including：
Fire tube cylindrical shell, its one end are fixedly connected on the burner shell；With
Fire tube cone shell, the small one end of its diameter are connected with the other end of the fire tube cylindrical shell.
8. classification combustion gas low NO according to claim 7, it is characterised in that the fire tube cylinder of the fire tube
One end of housing is provided with multiple first mounting holes, and fastener passes through every one first mounting hole and the burner shell stationary phase
Even, the fire tube cylindrical shell is provided with multiple second mounting holes close to the surface of the fire tube cone shell.
9. classification combustion gas low NO according to claim 8, it is characterised in that the baffle plate includes：
Baffle plate cylindrical shell, its one end are fixedly connected on the fire tube；With
Boss, in annular shape, the inner side of the baffle plate cylindrical shell other end is raised in, and the boss is positioned at the multiple
One-level spout is along at the downstream of air flow, to stop the combustion gas of the multiple one-level nozzle.
10. classification combustion gas low NO according to claim 9, it is characterised in that the baffle plate is located at the fire tube
Cylindrical shell and fire tube cone shell junction, the surface of the baffle plate cylindrical shell are provided with the 3rd mounting hole, and fastener passes through
Second mounting hole and the 3rd mounting hole, the fire tube is fixedly connected on by the baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720487549.7U CN206724166U (en) | 2017-05-04 | 2017-05-04 | One kind classification combustion gas low NO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720487549.7U CN206724166U (en) | 2017-05-04 | 2017-05-04 | One kind classification combustion gas low NO |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206724166U true CN206724166U (en) | 2017-12-08 |
Family
ID=60508598
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720487549.7U Active CN206724166U (en) | 2017-05-04 | 2017-05-04 | One kind classification combustion gas low NO |
Country Status (1)
| Country | Link |
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| CN (1) | CN206724166U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099425A (en) * | 2018-10-22 | 2018-12-28 | 北京泷涛环境科技有限公司 | A kind of interior super low NO of circulation of flue gas |
| CN112628725A (en) * | 2021-01-12 | 2021-04-09 | 哈尔滨工业大学 | Radial grading low NOx pulverized coal combustion device |
| CN114110580A (en) * | 2018-04-25 | 2022-03-01 | 北京兴达奇热工控制设备有限公司 | Low-nitrogen combustor |
-
2017
- 2017-05-04 CN CN201720487549.7U patent/CN206724166U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110580A (en) * | 2018-04-25 | 2022-03-01 | 北京兴达奇热工控制设备有限公司 | Low-nitrogen combustor |
| CN109099425A (en) * | 2018-10-22 | 2018-12-28 | 北京泷涛环境科技有限公司 | A kind of interior super low NO of circulation of flue gas |
| CN109099425B (en) * | 2018-10-22 | 2022-06-28 | 北京泷涛环境科技有限公司 | Flue gas inner loop ultralow nitrogen combustor |
| CN112628725A (en) * | 2021-01-12 | 2021-04-09 | 哈尔滨工业大学 | Radial grading low NOx pulverized coal combustion device |
| CN112628725B (en) * | 2021-01-12 | 2021-11-12 | 哈尔滨工业大学 | Radial grading low NOx pulverized coal combustion device |
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Address after: 100072, Fengtai District Beijing Park South Road, cross industry building 515 Patentee after: Beijing shuimuqingyuan Environmental Protection Technology Co., Ltd Address before: 100072, Fengtai District Beijing Park South Road, cross industry building 515 Patentee before: Beijing Shuimu Xingyuan Environmental Protection Technology Co., Ltd. |