CN207659387U - A kind of uplink pressurization heat storage type pyrolysis stove - Google Patents
A kind of uplink pressurization heat storage type pyrolysis stove Download PDFInfo
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- CN207659387U CN207659387U CN201721562423.8U CN201721562423U CN207659387U CN 207659387 U CN207659387 U CN 207659387U CN 201721562423 U CN201721562423 U CN 201721562423U CN 207659387 U CN207659387 U CN 207659387U
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Abstract
The utility model is related to a kind of uplink pressurization heat storage type pyrolysis stoves.Pyrolysis oven includes furnace body, radiant tube and gas distribution grid, furnace body is cylinder, the top of furnace body is equipped with product exit, the bottom of furnace body is equipped with reaction-ure feeding mouth, radiant tube is set in furnace body, above reaction-ure feeding mouth, radiant tube is one group of heat accumulation type radiant tube being vertically intervally arranged；Gas distribution grid is set to the bottom of furnace body, and gas distribution grid includes sprue and runner, and sprue is equipped with air inlet, and runner is equipped with gas vent；Position of the gas distribution grid on the vertical direction of furnace body is less than reaction-ure feeding mouth.The utility model solves the problems, such as that existing pyrolysis is not high pressure resistant, by pressurized control lift gas flow, is accurately controlled to pyrolytic reaction to realize, improves conversion ratio, improves target product yield；The utility model heating process flow is simple, system temperature control is accurate, temperature adjustment is convenient, reduces the failure rate of system, improves the thermal efficiency of system.
Description
Technical field
The utility model is related to pyrolysis oven technical field more particularly to a kind of uplink heat storage type pyrolysis stoves.
Background technology
During coal trans-utilization, such as burning, gasification, liquefaction and pyrolysis are all the first step of chemical reaction, and shadow
Subsequent process is rung, therefore suffers from critically important meaning to coal gasification, liquefaction and burning etc..The pyrolytic process of coal is one
A extremely complex physics, chemical process.In the process in coal each component behavior by property, pyrolytical condition of coal etc. because
The influence of element.Previous people bias toward normal pressure to the R and D work of pyrolysis of coal technology, but with pressurised fluidized bed and whole
Body integrated coal gasification combined cycle system (Integrated Gasification Combined Cycle, referred to as " IGCC ") etc.
The pyrolysis of coal under pressurization is increasingly paid attention in the development of technology, in the past 20 years, countries in the world.Coal pressurized pyrolysis is coal pressure gasification
An important stage, although this stage is very of short duration for entire gasification, almost all of tar is gentle
State hydro carbons all carrys out this stage.
Currently, from the point of view of mode of heating, domestic and international existing pyrolytic process mostly uses porcelain ball and thermal decomposition product semicoke conduct
Coal gas after solid thermal carriers or product char Gasification is as mode of heatings such as gas heat carriers.Existing mode of heating is related to
The processes such as heating, separation to heat carrier, cause system process long, system failure rate is higher.
Moreover, finding that porcelain ball is heated to 600 DEG C or more and recycled repeatedly in experiment, abrasion sex chromosome mosaicism will produce；It is glutinous
Knot property coal can be attached in pyrolytic process on porcelain ball, and only non-caking coal and Iight sticky coal can be used for the technique, usually
Tar yield is not high.
When using semicoke as heat carrier, since a large amount of burnt tiny fragments of stone, coal, etc. fine graineds are brought into tar, solid particulate matter in tar
Content is up to 40%-50%, and the processing and utilization to tar bring difficulty；Using can be because of tar and particle when caking coal
It is aggregated and causes failure；The semicoke of coal and heat is mixed using mechanical agitation, abrasion is more serious, and equipment amplification, which exists, asks
Topic.
Using gas as heat carrier, be related to heating, separation etc., cause system process long, system failure rate compared with
It is high；Using combustible gas as heat carrier, combustible gas in warm if there is leakage phenomenon, may be with the heating of heating room
Media contact brings security risk.
In short, the solid thermal carriers such as semicoke, porcelain ball have seriously affected the processing capacity of pyrolysis furnace apparatus, the air heats such as coal gas
There is also larger security risks for carrier preheating.
In addition, from the point of view of pyrolysis oven type of reactor, pyrolysis oven used at present, majority is fixed bed, or has downlink
The function of fluid bed, pulverized coal pyrolysis is insufficient or the second decomposition of volatility product is serious, leads to conversion ratio and target product yield
It is too low.
From the point of view of pyrolytical condition, domestic and international existing pyrolysis oven majority is suitable for the pyrolytic reaction under condition of normal pressure.Therefore,
It is badly in need of the uplink heat storage type pyrolysis stove that a kind of satisfaction of design carries out pyrolytic reaction under high pressure now.
Utility model content
In view of the above-mentioned problems, carrying out pyrolytic reaction under high pressure to meet, and tar dustiness can be reduced, letter
Change technological process, reduce the failure rate of system so that system temperature control is accurate, temperature adjustment is convenient, to pyrolytic reaction depth and react into
Journey control effectively, and improves converting rate, improves target product yield, improves the thermal efficiency of system, the utility model carries
For a kind of uplink heat storage type pyrolysis stove.
The utility model is intended to provide a kind of uplink pressurization heat storage type pyrolysis stove, and the pyrolysis oven includes furnace body, radiant tube
And gas distribution grid, wherein the furnace body is cylinder, and the top of the furnace body is equipped with product exit, the bottom of the furnace body
Equipped with reaction-ure feeding mouth, the radiant tube is set in the furnace body, is located above the reaction-ure feeding mouth, the radiant tube
The heat accumulation type radiant tube being vertically intervally arranged for one group；The gas distribution grid is set to the bottom of the furnace body, described
Gas distribution grid includes sprue and runner, and the sprue is equipped with gas feed, and the runner goes out equipped with gas
Mouthful；Position of the gas distribution grid on the vertical direction of the furnace body is less than the reaction-ure feeding mouth.
Above-mentioned pyrolysis oven, the sprue penetrate through the two sides of the furnace body, and the runner is in the sprue
Setting is spaced on length direction, each runner intersects with the sprue to be connected to and be divided into two sections by the sprue.
Above-mentioned pyrolysis oven, the radiant tube both ends are both provided with burner, the burner respectively with outside the furnace body
The storage heater in portion is connected, and the burner is corresponded with the storage heater.
On above-mentioned pyrolysis oven, upright projection of the radiant tube on the gas distribution grid and the gas distribution grid
The position of runner do not overlap each other.
Above-mentioned pyrolysis oven, the runner vertical arrangement is between the level interval of two radiant tubes, the shunting
Road is equipped with multiple gas vents；The caliber d of the radiant tube, the width of the level interval D and the runner of the radiant tube
It spends L1 and meets (1/2) (D-d)≤D/L1≤D-d.
Above-mentioned pyrolysis oven, the ratio of the gross area S of gas vent on the length L2 and the runner of the runner
Meet 8≤L2/S≤10.
The top of above-mentioned pyrolysis oven, the furnace body is truncated cone-shaped, and the upper bottom surface radius at the top is bottom radius surface
1.5-3 times, the height at the top is the 1/9-1/8 of the height of the furnace body, and the ratio of height to diameter of the pyrolysis oven is 5-10.
The uplink pressurization heat storage type pyrolysis stove of the utility model, reaction unit is compact-sized, heat transfer efficiency is high, operation is simple
List is convenient for industrialization amplification and continuous production, and compared with traditional fluid bed, material takes part in cycle in uplink fluid bed,
Heat transfer is more uniformly rapid, and reaction is more abundant；Using more heat accumulation type radiant tubes, provided for the reactant in pyrolysis oven
Heat source, without heat carrier and mechanical rotation device, technological process is simple, system temperature control is accurate, temperature adjustment is convenient, without gas and admittedly
Heating, the separation process of body heat carrier, reduce the failure rate of system, in combination with convection current, heat transfer and radiant heat transfer control, carry
The high thermal efficiency of system；Reduce the dustiness of tar；Reaction mass is fully broken up by gas distribution grid, is effectively increased
The big contact area of reaction mass and radiant tube so that heat transfer is more uniformly rapid, and reaction is more abundant, improves anti-
Answer the utilization rate of object and the utilization rate of system thermal；The utility model uses cylindrical pyrolysis oven, solves existing rectangular heat
Not high pressure resistant, the yielding problem that solution stove occurs during pressurized pyrolysis.
Description of the drawings
Fig. 1 is the uplink heat storage type pyrolysis stove positive structure diagram of the utility model embodiment；
Fig. 2 is the uplink heat storage type pyrolysis stove overlooking structure diagram of the utility model embodiment；
Fig. 3 is the gas distribution grid structural schematic diagram of the utility model embodiment.
Specific implementation mode
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when the embodiment of the utility model and various aspects.However, specific implementations described below side
Formula and embodiment are for illustrative purposes only, rather than limitations of the present invention.
The heat storage type pyrolysis stove as shown in Figure 1, the uplink that the utility model is implemented is pressurizeed, including furnace body 3, radiant tube 2 are gentle
Body distribution grid 5, wherein the furnace body 3 is cylinder, and the top of the furnace body 3 is equipped with product exit 1, the bottom of the furnace body 3
Equipped with reaction-ure feeding mouth 4, the radiant tube 2 is set in the furnace body 3, is located at 4 top of the reaction-ure feeding mouth, the spoke
It is one group of heat accumulation type radiant tube being vertically intervally arranged to penetrate pipe 2；The gas distribution grid 5 is set to the bottom of the furnace body 3
Portion, the gas distribution grid 5 include sprue 5-2 and runner 5-1, and the sprue 5-2 is equipped with gas feed 6, described
Runner 5-1 is equipped with gas vent 5-3；Position of the gas distribution grid 5 on the vertical direction of the furnace body 3 is less than institute
State reaction-ure feeding mouth 4.
Further, the top of furnace body 3 is truncated cone-shaped, and bottom radius surface is 2-10m, and upper bottom surface radius is bottom surface half
1.5-3 times of diameter, the highly 1/9-1/8 for furnace body height.Pyrolysis oven reactor ratio of height to diameter (H/D) is 5-10.
More heat accumulation type radiant tubes provide heat source for the pyrolytic reaction in pyrolysis oven reactor.The heat accumulation type radiant tube 2
Both ends are both provided with burner 7, and burner 7 is connected with the storage heater outside reactor, and burner is corresponded with storage heater.It is more
Root heat accumulation type radiant tube 2 is vertically intervally arranged, a diameter of 0.1-0.3m of radiant tube 2.
The gas feed 6 is set to reactor bottom, and the caliber of gas feed 6 is the 1/5-1/3 of 2 caliber of radiant tube
Times.
The setting of reaction-ure feeding mouth 4 is located at 5 top 0.2-0.6m high of gas distribution grid in reactor bottom side,
For reaction-ure feeding mouth 4 uniformly distributed 2-4 along same level circumference, the size of reaction-ure feeding mouth 4 is the 1- of 6 size of gas feed
2 times.
Gas distribution grid 5 is installed below pyrolysis oven reaction-ure feeding mouth, it is by gas distribution grid 5 that reaction mass is abundant
It breaks up, so as to effectively increase the contact area of reaction mass and radiant tube 2 so that heat transfer is more uniformly rapid,
Reaction is more abundant, improves the utilization rate of reactant and the utilization rate of system thermal.Sprue 5-2 is horizontally extending,
The sprue 5-2 penetrates through the two sides of the furnace body 3, with multiple runner 5-1 vertical connections.Runner 5-1 is in sprue
Setting is spaced on the length direction of 5-2, each runner 5-1 intersects with the sprue 5-2 to be connected to and by the mainstream
Road 5-2 is divided into two sections.The location of runner 5-1 and projection immediately below radiant tube 2 are not overlapped, and ensure that reactant exists
It is moved upwards along 2 peripheral wall surface of radiant tube under the action of gas, avoids resistance of the radiant tube 2 to uplink reaction mass and gas
Plug, and ensure that the heated uniformity of reaction mass.Preferably to reach said effect, runner 5-1 preferred verticals are arranged in
At the level interval of two radiant tubes 2.Runner 5-1 is equipped with multiple gas vent 5-3.The caliber of radiant tube 2 is d, radiant tube 2
Level interval be D, the width of runner 5-1 is L1, and L1 and D, d meet 1/2 (D-d)≤D/L1≤D-d.Runner 5-1's
Length is L2, and the gross area of gas vent 5-3 is that the ratio of S, L2 and S meet 8≤L2/S≤10 on runner 5-1.
The caliber of sprue 5-2 is consistent with air inlet caliber, and the caliber of runner 5-1 is the 1/2- of sprue 5-1 calibers
3/4 times.
The technique being pyrolyzed using above-mentioned uplink pressurization heat storage type pyrolysis stove is as follows：Reactant is from reaction-ure feeding mouth 4
Into pyrolysis oven reactor bottom, pressurization lift gas enters gas from the lift gas import 6 at pyrolysis oven reactor bottom both ends
Body distribution grid 5, and the gas feed 6 on gas distribution grid 5 enters pyrolysis oven inside reactor.Lift gas can be nitrogen.
Reactant is under the action of lift gas, while along pyrolysis oven reactor lower part to ionized motion.In several seconds, reactant is by spoke
Penetrate pipe 2 and be heated rapidly to 450-950 DEG C, concurrently give birth to pyrolytic reaction, generate gaseous state and liquid product and solid semicoke, product from
Pyrolysis oven reactor head is discharged.
The process of 2 heat-accumulation combustion of above-mentioned heat accumulation type radiant tube is as follows：Heat accumulation type radiant tube 2 is respectively arranged at tube body both ends
Burner, fuel gas and temperature gas enter to setting in the ports radiant tube A after being set the preheating of the regenerative chamber outside pyrolysis oven
Burner combustion reaction occurs, the flame that burner combustion generates at one end along radiant tube length direction forms temperature when spraying
Gradient is spent, i.e., along the ends radiant tube A to the other side ends B, temperature downward trend in gradient.After the completion of A end burnings, A end burnings generate
Flue gas enter to the ends B regenerative chamber, pre-heating fuel and combustion air, the fuel and combustion air after preheating enter to radiation pipe B end combustion
Burner also forms temperature gradient in the flame that other end burner combustion generates when spraying.The burning at same radiant tube both ends
Device replaces reversing combustion.
When the burner at both ends alternately burns, it is formed by two temperature gradient superpositions so that entire heat accumulating type
Radiant tube bulk temperature is evenly distributed.To ensure that pyrolysis oven internal-response material is heated evenly, on single heat accumulation type radiant tube
Temperature difference is not higher than 30 DEG C.In pyrolysis oven inside reactor, more heat accumulation type radiant tubes are vertically intervally arranged, and ensure each
Regional temperature is evenly distributed.Wherein the ends A can be the either port of radiant tube, and the ends B are another corresponding to the ends A of same radiant tube
One end.
The uplink of the utility model is pressurizeed heat storage type pyrolysis stove, by controlling lift gas flow, regulation and control particle speed and
Particle residence time effectively inhibits second pyrolysis, to realize effective control for pyrolytic reaction depth and reaction process,
Conversion ratio is improved, the yield of target product is improved.
The utility model uplink pressurization heat storage type pyrolysis furnace structure it is compact, heat transfer efficiency is high, it is easy to operate, convenient for industry
Change amplification and continuous production, compared with traditional fluid bed, interior material takes part in cycle, and heat transfer is more uniformly fast
Speed, reaction are more abundant.
The utility model use more heat accumulation type radiant tubes, provide heat source for the coal dust in pyrolysis oven, without heat carrier with
Mechanical rotation device, technological process is simple, system temperature control is accurate, temperature adjustment is convenient, is not necessarily to the heating of gas and solid thermal carriers, divides
From process, the failure rate of system is reduced.
The utility model is controlled in combination with convection current, heat transfer and radiant heat transfer, improves the thermal efficiency of system.
The utility model reduces the dustiness of tar compared with semicoke is as heat carrier technique.
The technique of the utility model is strong to coal adaptability, no matter for non-caking coal, Iight sticky coal, strong cohesiveness
Coal is suitable for.
The utility model solves what existing rectangular pyrolysis oven occurred during pressurized pyrolysis using cylindrical pyrolysis oven
Not high pressure resistant, yielding problem.
The lift gas of the utility model is fully broken up reaction mass by gas distribution grid, so as to effectively increase
The contact area of big reaction mass and radiant tube so that heat transfer is more uniformly rapid, and reaction is more abundant, improves reaction
The utilization rate of object and the utilization rate of system thermal.
Embodiment one
A kind of uplink pressurization heat accumulating type jet coal low-temperature rapid thermal solution stove, as shown in Figure 1.Heat accumulating type fast pyrogenation stove is a height of
12m, top exit a diameter of 0.8m, base diameter 2m, 26 heat accumulation type radiant tubes of vertically arranging inside pyrolysis oven
2.The caliber of radiant tube 2 is 160mm, and horizontal and vertical spacing is respectively 300mm to radiant tube 2 two-by-two.Lift gas distribution grid 5
It is made of a sprue 5-2 and five runner 5-1, runner 5-1 width is 110mm, is arranged successively on five runner 5-1
Cloth 6,8,10,8 and 6 gas vent 5-3, gas vent 5-3 calibers are 40mm, and the vertical spacing of gas vent 5-3 is
200mm.The jet coal containing 8.24% moisture after drying is crushed to 6mm hereinafter, coal particle size is distributed as shown in table 1, coal
The Industrial Analysis and elemental analysis of powder are as shown in table 2 and table 3.100kg/ (m are taken respectively at twice in different heating temperatures2﹒ s)
Coal dust enter pyrolysis oven reactor bottom from reaction-ure feeding mouth 4, lift gas nitrogen is with the pressure of 0.6Mpa and 7m/s
Speed enters gas distribution grid 5 from lift gas import 6, enters runner 5-2 along sprue 5-1, continues along runner 5-2
Gas vent 5-3 enters pyrolysis oven inside reactor.Coal dust is under the action of lift gas nitrogen, along pyrolysis oven reactor lower part
To ionized motion.In 5s, coal dust is heated rapidly to 450 DEG C and 500 DEG C by radiant tube 2 respectively, concurrently gives birth to pyrolytic reaction.Adding
When hot temperature is 500 DEG C, 15.51% pyrolysis gas, 9.51% pyrolysis water, 9.33% tar and 65.65% semicoke are generated；Adding
When hot temperature is 450 DEG C, 13.22% pyrolysis gas, 10.58% pyrolysis water, 11.31% tar and 64.89% semicoke are generated.Heat
Product is solved to be discharged from pyrolysis oven reactor head.
1 jet coal particle diameter distribution of table
2 long flame proximate analysis of coal (%) of table
3 long flame ultimate analysis of coal (%) of table
M hereinadRepresent moisture；AadRepresent ash content；VadRepresent volatile matter；CadRepresent fixed carbon content；HadRepresent hydrogen
Content；OadRepresent oxygen content；NadRepresent nitrogen content；SadRepresent sulfur content.
Embodiment two
A kind of uplink pressurization heat accumulating type lignite low-temperature rapid thermal solution stove, as shown in Figure 1.Heat accumulating type fast pyrogenation stove is a height of
12m, a diameter of 0.8m of top exit, bottom are a diameter of 2m, 26 heat accumulating type radiation of vertically arranging inside pyrolysis oven
Pipe.The caliber of radiant tube 2 is 160mm, and horizontal and vertical spacing is respectively 300mm to radiant tube 2 two-by-two.Lift gas distribution grid
5 are made of a sprue 5-2 and five runner 5-1, and runner 5-1 width is 110mm, on five runner 5-1 successively
Arrange 6,8,10,8 and 6 gas vent 5-3, and the caliber of gas vent 5-3 is 40mm, and the vertical spacing of gas vent 5-3 is equal
For 200mm.The lignite containing 15.10% or so moisture after drying is crushed to 6mm hereinafter, coal particle size distribution is such as 4 institute of table
Show, the Industrial Analysis and elemental analysis of coal dust are as shown in table 5 and table 6.100kg/ is taken respectively at twice in different heating temperatures
(m2﹒ s) coal dust enter pyrolysis oven reactor bottom from reaction-ure feeding mouth 4, lift gas nitrogen with the pressure of 0.6Mpa and
The speed of 5m/s from lift gas feed inlet 4 even into pyrolysis oven reactor bottom, and the gas on gas distribution grid 5 into
Mouth 6 enters pyrolysis oven inside reactor.Coal dust is transported under the action of lift gas nitrogen, along pyrolysis oven reactor lower part to top
It is dynamic.In 7s, coal dust is heated rapidly to 800 DEG C and 950 DEG C by radiant tube 2 respectively, concurrently gives birth to pyrolytic reaction.It is in heating temperature
At 800 DEG C, 30.71% pyrolysis gas, 7.62%% pyrolysis water, 1.10% tar and 60.27% semicoke are generated；In heating temperature
When being 950 DEG C, 35.65% pyrolysis gas, 5.16%% pyrolysis water, 0.96% tar and 58.23% semicoke are generated.Product is from warm
Solve the discharge of stove reactor head.
4 lignite particle diameter distribution of table
5 lignite Industrial Analysis (%) of table
6 lignite elemental analysis (%) of table
Can be seen that from above-described embodiment, the uplink of the utility model pressurization heat accumulating type solution stove meet under high pressure into
Row pyrolytic reaction, and tar dustiness can be reduced, technological process is simplified, the failure rate of system is reduced so that system control
Warm accurate, temperature adjustment conveniently, control effectively to pyrolytic reaction depth and reaction process, improves converting rate, improve mesh
Product yield is marked, the thermal efficiency of system is improved.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And it does not limit the embodiments.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among changes and variations that derived from are still in the scope of protection of the utility model.
Claims (7)
- The heat storage type pyrolysis stove 1. a kind of uplink is pressurizeed, which is characterized in that the pyrolysis oven includes furnace body, radiant tube and gas distribution Plate, whereinThe furnace body is cylinder, and the top of the furnace body is equipped with product exit, and the bottom of the furnace body is equipped with reaction-ure feeding Mouthful；The radiant tube is set in the furnace body, is located above the reaction-ure feeding mouth, and the radiant tube is one group along vertical The heat accumulation type radiant tube that direction is intervally arranged；The gas distribution grid is set to the bottom of the furnace body, and the gas distribution grid includes sprue and runner, the master Runner is equipped with gas feed, and the runner is equipped with gas vent；Vertical side of the gas distribution grid in the furnace body Upward position is less than the reaction-ure feeding mouth.
- 2. pyrolysis oven according to claim 1, which is characterized in that the sprue penetrates through the two sides of the furnace body, institute It states runner and is spaced setting on the length direction of the sprue, each runner intersects with the sprue to be connected to simultaneously It is divided into two sections by the sprue.
- 3. pyrolysis oven according to claim 1, which is characterized in that the radiant tube both ends are both provided with burner, described Burner is connected with the storage heater outside the furnace body respectively, and the burner is corresponded with the storage heater.
- 4. pyrolysis oven according to claim 2, which is characterized in that the radiant tube is vertical on the gas distribution grid It projects and is not overlapped each other with the position of the runner on the gas distribution grid.
- 5. pyrolysis oven according to claim 2, which is characterized in that the runner vertical arrangement is in two radiant tubes Level interval between, the runner be equipped with multiple gas vents；The caliber d of the radiant tube, the level of the radiant tube The width L1 of space D and the runner meets (1/2) (D-d)≤D/L1≤D-d.
- 6. pyrolysis oven according to claim 2, which is characterized in that gas on the length L2 and the runner of the runner The ratio of the gross area S of body outlet meets 8≤L2/S≤10.
- 7. pyrolysis oven according to claim 1, which is characterized in that the top of the furnace body is truncated cone-shaped, the top Upper bottom surface radius is 1.5-3 times of bottom radius surface, and the height at the top is the 1/9-1/8 of the height of the furnace body, described The ratio of height to diameter of pyrolysis oven is 5-10.
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| CN107903923A (en) * | 2017-11-21 | 2018-04-13 | 北京神雾电力科技有限公司 | A kind of uplink pressurization heat storage type pyrolysis stove and method for pyrolysis |
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Cited By (1)
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| CN107903923A (en) * | 2017-11-21 | 2018-04-13 | 北京神雾电力科技有限公司 | A kind of uplink pressurization heat storage type pyrolysis stove and method for pyrolysis |
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Effective date of registration: 20201118 Address after: 102209 226, 2nd floor, building 71, 30 Litang Road, Changping District, Beijing Patentee after: Beijing Hengfeng Yaye Technology Development Co., Ltd Address before: 102200 Beijing city Changping District Machi Town kamis Road No. 18 building 201 room 2 Patentee before: BEIJING SHENWU POWER TECHNOLOGY Co.,Ltd. |