CN109323256A - A kind of high vanadium titanium furnace charge rotary kiln burner - Google Patents

A kind of high vanadium titanium furnace charge rotary kiln burner Download PDF

Info

Publication number
CN109323256A
CN109323256A CN201811165173.3A CN201811165173A CN109323256A CN 109323256 A CN109323256 A CN 109323256A CN 201811165173 A CN201811165173 A CN 201811165173A CN 109323256 A CN109323256 A CN 109323256A
Authority
CN
China
Prior art keywords
air duct
rotary kiln
head
furnace charge
vanadium titanium
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.)
Pending
Application number
CN201811165173.3A
Other languages
Chinese (zh)
Inventor
杨百顺
廖远峰
魏川
万成
张鹏
田小平
衡红
谢超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Desheng Group Vanadium Titanium Co Ltd
Original Assignee
Sichuan Desheng Group Vanadium Titanium Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sichuan Desheng Group Vanadium Titanium Co Ltd filed Critical Sichuan Desheng Group Vanadium Titanium Co Ltd
Priority to CN201811165173.3A priority Critical patent/CN109323256A/en
Publication of CN109323256A publication Critical patent/CN109323256A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/70Baffles or like flow-disturbing devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

The present invention discloses a kind of high vanadium titanium furnace charge rotary kiln burner, including the first air duct set gradually from the inside to the outside, fuel channel, second air duct, third air duct, first air duct, fuel channel, second air duct and third air duct is successively set with and head flushes, the end of each pipeline successively stretches out in the adjacent pipe end that its outside is set with, and the end of each pipeline and the outer peripheral surface of its adjacent pipeline in inside are tightly connected, the application provides a kind of high vanadium titanium furnace charge rotary kiln burner, the full combustion of fuel gas in fuel can be sufficiently promoted, efficiently use coal gas of converter, energy utilization rate is high, and flame holding is good.

Description

A kind of high vanadium titanium furnace charge rotary kiln burner
Technical field
The present invention relates to burner, in particular to a kind of high vanadium titanium furnace charge rotary kiln burner.
Background technique
Currently, rotary kiln generally uses the gas burner of binary channels and triple channel with gas burner, combustion situation is not User's production requirement can be met well.Gaseous fuel and combustion air cannot be sufficiently mixed and burned by burner, the combustion of fuel Low efficiency is burnt, user can only use pure gas fuel, not become the flame profile and heat force intensity of requirement, binary channels or three That there is also structures is simple for channel gas burner, and burning velocity is slow, and flame diverging is powerless, and the fuel gas in coal gas of converter can not Active combustion causes that energy utilization rate is low, calorific value is low containing a large amount of not sufficiently combusted carbon monoxide in combustion tail gas, can not Meet the rotary kiln sintered energy-saving and environment-friendly requirement of vanadium titanium steel factory.
Summary of the invention
In view of this, the application provides a kind of high vanadium titanium furnace charge rotary kiln burner, can sufficiently promote flammable in fuel The full combustion of gas efficiently uses coal gas of converter, and energy utilization rate is high, and flame holding is good.
In order to solve the above technical problems, technical solution provided by the invention is in view of this, the application provides a kind of high vanadium Titanium furnace charge rotary kiln burner, including the first air duct, fuel channel, the second air duct, the third air duct set gradually from the inside to the outside, First air duct, fuel channel, the second air duct and third air duct are successively set with and head flushes, and the end of each pipeline is successively The adjacent pipe end that its outside is set with is stretched out in, and the end of each pipeline and the outer peripheral surface of pipeline adjacent on the inside of it are equal It is tightly connected.
Preferably, first air duct is provided with the first conical section close to the one end on head, and first conical section is close The diameter of the one end on head is greater than the diameter of the one end of the first conical section far from head, and the head of first conical section is provided with Central distribution device.
Preferably, the central distribution device includes with one heart and the first cover board and the second cover board that are rotatably connected described the The centre bore that can be overlapped one by one is distributed on one cover board and second cover board, the first cover board fixing seal is mounted on The head in the first air duct, the center point of second cover board are fixedly connected with rotation adjusting lever, and the rotation adjusting lever is along institute Radially extending for the first air duct is stated, end is stretched out in the end in the first air duct, and the end of the rotation adjusting lever is provided with hand Dynamic regulating mechanism.
Preferably, the fuel channel includes the first fuel channel and the second fuel channel set gradually from the inside to the outside, First fuel channel and the second fuel channel are provided with the second conical section, second conical section in one end close to head Diameter close to the one end on head is greater than the diameter of one end far from head.
Preferably, the cone angle of the second conical section inner peripheral surface is 2-5 °.
Preferably, second air duct is provided with cyclone close to the one end on head, and the third air duct is close to head One end is provided with axial diversion plate, offers axially disposed hole on the axial diversion plate.
Preferably, third air duct periphery is cast with corundum flame retardant coating.
Preferably, it is respectively arranged with the first air port and the second air port on the third air duct and second air duct, first Air port is sealedly connected with the first branch pipe, and the second air port is sealedly connected with the second branch pipe, first branch pipe and second branch pipe It is parallel with combustion-supporting air duct, the combustion-supporting air duct is connected to first air duct by compensating pipe.
Preferably, the first FlexbleJoint is provided on first branch pipe;The second wave is provided on the third air duct Line compensator, second FlexbleJoint are provided with third on the fuel channel between the first air port and the second air port FlexbleJoint.
Preferably, it is additionally provided with pressure sensor in the third air duct, it is described for detecting the wind pressure in the first air duct Pressure sensor is connected with control system.
Compared with prior art, detailed description are as follows by the application:
This application discloses a kind of high vanadium titanium furnace charge rotary kiln burners, including the first wind set gradually from the inside to the outside Road, the second air duct, third air duct each lead into combustion-supporting gas, and the combustion-supporting gas that the first air duct is sent out is located at center can be with fuel Gas be sufficiently mixed effectively it is combustion-supporting, improve the efficiency of combustion of fuel, the second air duct and third air duct are wrapped in outside fuel gas, no The efficiency of combustion that fuel gas only can be improved can also improve the stability of flame.
First conical section of the head setting in the first air duct can reduce the flow velocity of combustion-supporting gas, and equal from center distributor Even distribution is sent out.
Centre bore on the first cover board and the second cover board of central distribution device corresponds, and the second cover board can be along itself Center of circle rotation adjusts the first air duct and sends out by changing the area of the centre bore intersection on the first cover board and the second cover board Combustion-supporting gas air quantity.When fuel gas is not enough, the area of centre bore intersection can be increased, improve the The air quantity for the combustion-supporting gas that one air duct is sent out can also reduce the area of centre bore intersection, reduce what the first air duct was sent out The air quantity of combustion-supporting gas saves the usage amount of combustion-supporting gas.
First air duct is for spraying combustion-supporting gas;Fuel channel is helped for spraying fuel gas, the second air duct for spraying Combustion gas body, makes combustion-supporting gas form the helical form jet-stream wind for being wrapped in fuel gas periphery, and propellant simultaneously promotes fuel to fire It burns, third air duct is used to form the radial spray air-flow for being wrapped in helical form jet-stream wind periphery, pushes away for spraying combustion-supporting gas Into fuel and promote fuel combustion.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the structural schematic diagram on the head of burner disclosed by the invention;
Fig. 3 is the enlarged drawing in Fig. 1 at A.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention Applying example, the present invention is described in further detail.
As shown in Figure 1 to Figure 2, a kind of high vanadium titanium furnace charge rotary kiln burner, including set gradually from the inside to the outside first Air duct (1), fuel channel, the second air duct (3), third air duct (4), the first air duct (1) is for spraying combustion-supporting gas;Fuel channel For spraying fuel gas, the second air duct (3) make combustion-supporting gas formation be wrapped in fuel gas periphery for spraying combustion-supporting gas Helical form jet-stream wind, propellant simultaneously promotes fuel combustion, and third air duct (4) are used to form for spraying combustion-supporting gas It is wrapped in the radial spray air-flow of helical form jet-stream wind periphery, propellant simultaneously promotes fuel combustion.
First air duct (1), fuel channel, the second air duct (3) and third air duct (4) are successively set with, and each pipeline is used It is flushed in the head for ejecting air-flow, the end of each pipeline successively stretches out in the adjacent pipe end that its outside is set with, tool Body, the end of second air duct (3) is stretched out outside third air duct (4) end, and the end of fuel channel is stretched out in institute It states outside the second air duct (3) end, the end of each pipeline outside the fuel channel end is stretched out in the end of the first air duct (1) The outer peripheral surface of adjacent pipeline is tightly connected with its inside.
Wherein:
The head of first air duct (1) is provided with the first conical section, and first conical section is close to the straight of head side Diameter is greater than the diameter that the first conical section leans on proximal end side.The head of first conical section is provided with central distribution device (11).
The central distribution device (11) includes the first cover board (111) and the second cover board (112) with one heart and being rotatably connected, The centre bore (113) that can be overlapped one by one is distributed on first cover board (111) and second cover board (112), it is described First cover board (111) fixing seal is mounted on the head of the first air duct (1), and the center point of second cover board (112) is fixed to be connected It is connected to rotation adjusting lever (114), rotation adjusting lever (114) the radially extending along the first air duct (1), end is stretched Out in the end of the first air duct (1), the end of the rotation adjusting lever (114) is provided with manual adjustment means (115), adjusts manually Section mechanism (115) includes a pair for being set to the external screw thread and first air duct end suit of rotation adjusting lever (114) end Nut, two nuts are mutually compressed and are matched with the external screw thread, when rotating two nuts, rotation adjusting lever (114) and spiral shell Mother is rotated with identical angular speed, the face of centre bore (113) intersection on the first cover board (111) and the second cover board (112) Product changes, the air quantity of the combustion-supporting gas for adjusting the first air duct (1) submitting.
The flow velocity for the combustion-supporting gas that first air duct (1) is passed through is 50-60m3/ min, wind pressure 30-35kPa.Combustion-supporting gas Body flow velocity at the first conical section reduces, and uniform diffusion profile is passed through from from centre bore (113), is formed and is located at Central Fuel Combustion air current.
The centre wind cover board includes the first cover board (111) and the second cover board (112) with one heart and being rotatably connected, described It is distributed with centre bore (113) on first cover board (111) and second cover board (112), the fixed peace of first cover board (111) Mounted in nozzle end, second cover board (112) is fixedly connected with rotation adjusting lever (114), the rotation adjusting lever (114) The other end stretches out the other end in nozzle, and the end of the rotation adjusting lever (114) is provided with screw thread, the nozzle tail portion suit There is a nut, the nut matches and relatively fixed with the screw thread.
The fuel channel includes the first fuel channel (21) and the second fuel channel (22) set gradually from the inside to the outside, First fuel channel (21) and the second fuel channel (22) are being provided with the second conical section close to head side, and described second Conical section is greater than the diameter of the second conical section principle head side close to the diameter of head one end.The inner circumferential of second conical section The cone angle in face is 2-5 °.First fuel channel (21) is for being passed through the first fuel gas, for spraying upon initiation;Described first Fuel gas is based on component, including 1 part of coke-stove gas, 2.5-3.2 parts of coal gas of converter;The first fuel gas wind pressure is 6- 10kPa.Second fuel channel (22) for being passed through the second fuel gas, second fuel gas based on component, including 1 part of coke-stove gas, 3-4 parts of coal gas of converter;The first fuel gas wind pressure is 8-12kPa.
Spray gun disclosed in the present application, in igniting, the first fuel channel (21) is passed through coke-stove gas content higher the One fuel gas includes mainly hydrogen, methane in coke-stove gas, and carbon monoxide content is lower, and calorific value is relatively high, in igniting For igniting;The coal gas of converter content that second fuel channel (22) is passed through higher second fuel gas includes in coal gas of converter There is a large amount of carbon monoxide, calorific value is relatively low, is the toxic gas recycled in pneumatic steelmaking, fills by mixing with coke-stove gas Divide using the combustible characteristic of carbon monoxide in coal gas of converter, recycles coal gas of converter and simultaneously pass through the first air duct (1), the second wind Road (3) and third air duct (4) are mixed into combustion-supporting gas and guarantee that carbon monoxide full combustion is carbon dioxide.
The head of second air duct (3) is provided with cyclone (31), and the cyclone (31) is for making the second air duct (3) In gas formed helical airflow.The flow velocity of the combustion-supporting gas is 55-65m in second air duct (3)3/ min, wind pressure For 33-40kPa.The flow velocity for the combustion-supporting gas that second air duct (3) is sent out is greater than the combustion-supporting gas that the first air duct (1) is sent out, therefore, The gas that second air duct (3) is sent out forms wind pressure, wraps the combustion-supporting gas of the first air duct (1) submitting, and the second air duct (3) are sent out Helical airflow the first fuel gas and the second fuel gas can be made to form helical form package air-flow, promote the first fuel gas Body and the conveying of the second fuel gas, at the same the first air duct (1) combustion-supporting gas for sending out in the wind pressure of helical airflow with first Fuel gas and the second fuel gas are sufficiently mixed, and make the first fuel gas and the second fuel gas full combustion.
The third air duct (4) is provided with axial diversion plate (41) far from one end of the feeding pipe, and the axial direction is led Flowing plate offers axially disposed hole on (41).The axial diversion plate (41) is used to make the gas shape in third air duct (4) The air-flow radially sprayed, the air-flow is for making air import further combustion-supporting second fuel gas.In the third air duct (4) The flow velocity for the combustion-supporting gas being passed through is 60-65m3/ min, wind pressure 35-40kPa.
Third air duct (4) periphery is cast with corundum flame retardant coating (5).
The first air port (43) and the second air port are respectively arranged on the third air duct (4) and second air duct (3) (32), the first air port (43) are sealedly connected with the first branch pipe (44), and the second air port (32) are sealedly connected with the second branch pipe (33), institute It states the first branch pipe (44) and second branch pipe (33) is parallel with combustion-supporting air duct (6), the combustion-supporting air duct (6) passes through compensation pipe (61) it is connected to first air duct (1).
The first FlexbleJoint (45) are provided on first branch pipe (44);Is provided on the third air duct (4) Two FlexbleJoints (46), second FlexbleJoint (46) are described between the first air port (43) and the second air port (32) Third FlexbleJoint (23) are provided between second combustion-supporting air port and main road gas entry.
Pressure sensor (47) are additionally provided in the third air duct (4), for detecting the wind pressure in the first air duct (1), The filters pressing sensor is connected with control system (6), the control system (6) according to the pressure value of detection and the first air duct (1), The initial pressure value of fuel channel, the second air duct (3) and third air duct (4) infers to obtain the gas pressure value in each channel.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change It also should be regarded as protection scope of the present invention into retouching.

Claims (10)

1. a kind of high vanadium titanium furnace charge rotary kiln burner, which is characterized in that including the first air duct set gradually from the inside to the outside (1), fuel channel, the second air duct (3), third air duct (4), first air duct (1), fuel channel, the second air duct (3) and Three air ducts (4) are successively set with and head flushes, and the end of each pipeline successively stretches out in the adjacent pipeline end that its outside is set with End, and the end of each pipeline and outer peripheral surface of adjacent pipeline is tightly connected on the inside of it, first air duct (1), second Air duct (3) is respectively used to be passed through the combustion-supporting gas that pressure is different, flow velocity is different with third air duct (4), and fuel channel is for being passed through Fuel gas.
2. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 1, which is characterized in that first air duct (1) one end close to head is provided with the first conical section, and the diameter of the one end of first conical section close to head is greater than first The diameter of the one end of conical section far from head, the head of first conical section are provided with central distribution device (11).
3. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 2, which is characterized in that the central distribution device It (11) include the first cover board (111) and the second cover board (112) with one heart and being rotatably connected, first cover board (111) and institute State the centre bore (113) for being distributed with and being overlapped on the second cover board (112) one by one, the first cover board (111) fixing seal It is mounted on the head of the first air duct (1), the center point of second cover board (112) is fixedly connected with rotation adjusting lever (114), institute Rotation adjusting lever (114) radially extending along the first air duct (1) is stated, end is stretched out in the end of the first air duct (1), The end of the rotation adjusting lever (114) is provided with manual adjustment means (115).
4. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 1, which is characterized in that the fuel channel packet Include the first fuel channel (21) and the second fuel channel (22) set gradually from the inside to the outside, first fuel channel (21) and Second fuel channel (22) is provided with the second conical section, the one end of second conical section close to head in one end close to head Diameter be greater than far from head one end diameter.
5. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 4, which is characterized in that second conical section The cone angle of inner peripheral surface is 2-5 °.
6. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 1, which is characterized in that second air duct (3) one end close to head is provided with cyclone (31), and the third air duct (4) is provided with axial diversion close to the one end on head Plate (41) offers axially disposed hole (42) on the axial diversion plate (41).
7. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 1, which is characterized in that the third air duct (4) periphery is cast with corundum flame retardant coating (5).
8. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 1, which is characterized in that the third air duct (4) and on second air duct (3) it is respectively arranged with the first air port (43) and the second air port (32), the first air port (43) sealing connects It is connected to the first branch pipe (44), the second air port (32) are sealedly connected with the second branch pipe (33), first branch pipe (44) and described Two branch pipes (33) are parallel with combustion-supporting air duct (6), and the combustion-supporting air duct (6) is connected to first air duct by compensation pipe (61) (1)。
9. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 8, which is characterized in that first branch pipe (44) the first FlexbleJoint (45) are provided on;It is provided with the second FlexbleJoint (46) on the third air duct (4), it is described Second FlexbleJoint (46) is provided with third wave between the first air port (43) and the second air port (32) on the fuel channel Line compensator (23).
10. a kind of high vanadium titanium furnace charge rotary kiln burner according to claim 1, which is characterized in that the third air duct (4) pressure sensor (47) are additionally provided in, for detecting the wind pressure in the first air duct (1), the pressure sensor (47) is even It is connected to control system (6).
CN201811165173.3A 2018-09-30 2018-09-30 A kind of high vanadium titanium furnace charge rotary kiln burner Pending CN109323256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811165173.3A CN109323256A (en) 2018-09-30 2018-09-30 A kind of high vanadium titanium furnace charge rotary kiln burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811165173.3A CN109323256A (en) 2018-09-30 2018-09-30 A kind of high vanadium titanium furnace charge rotary kiln burner

Publications (1)

Publication Number Publication Date
CN109323256A true CN109323256A (en) 2019-02-12

Family

ID=65266704

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811165173.3A Pending CN109323256A (en) 2018-09-30 2018-09-30 A kind of high vanadium titanium furnace charge rotary kiln burner

Country Status (1)

Country Link
CN (1) CN109323256A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010053453A (en) * 1998-12-10 2001-06-25 에릭 오펠스트럽 매드센 Burner
CN1945118A (en) * 2006-09-20 2007-04-11 小霍华德·C·奥利弗 Fuel jet device
CN102213422A (en) * 2011-04-21 2011-10-12 扬州市银焰机械厂 Multi-channel mixed gas burner
CN203464279U (en) * 2013-08-09 2014-03-05 襄阳中和机电技术有限公司 Low-nitrogen-oxide calcium carbide furnace gas burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010053453A (en) * 1998-12-10 2001-06-25 에릭 오펠스트럽 매드센 Burner
CN1945118A (en) * 2006-09-20 2007-04-11 小霍华德·C·奥利弗 Fuel jet device
CN102213422A (en) * 2011-04-21 2011-10-12 扬州市银焰机械厂 Multi-channel mixed gas burner
CN203464279U (en) * 2013-08-09 2014-03-05 襄阳中和机电技术有限公司 Low-nitrogen-oxide calcium carbide furnace gas burner

Similar Documents

Publication Publication Date Title
CN203869039U (en) Three-level air distribution gas burner
CN103672886A (en) Local oxygen-enriched combustor for cement kiln furnace
CN108728168A (en) Gasification burner
CN201462853U (en) Combustion nozzle used in lime rotary kiln
CN109611832B (en) Burner for multi-channel double-vortex rotary kiln
CN104791792B (en) A kind of low NOx gaseous fuel burners and combustion method
CN101629718A (en) Low-nitrogen-oxide multi-tube axial eddy pulverized-coal burner
CN106122946A (en) A kind of Flat Flame Burner
CN109323256A (en) A kind of high vanadium titanium furnace charge rotary kiln burner
CN101718432A (en) Swirl injection type pulverized fuel burner
CN104633658B (en) A kind of low Nox burner
CN207094614U (en) Four-channel coal burner for cement kiln
CN208090692U (en) Micro- gas combines altar lamp ignition system
CN202209676U (en) Coal spraying jet
CN203703959U (en) Cement kiln local oxygen-enriched combustor
CN105953224A (en) Saturated steam catalytic burner used for cement decomposition furnace
WO1987002756A1 (en) Radiant tube burner
CN104990079A (en) Biomass gas burner
CN115264500A (en) Double-cyclone burner for cement clinker production
CN209726202U (en) Burner nozzle axis stream air passage structure and burner nozzle
CN207751345U (en) Rotary kiln adjustable burner
CN209726203U (en) Six channel burner nozzles of one kind and burner
CN209819539U (en) Novel combustor suitable for multiple working conditions
CN104154538B (en) Multifunctional universal cyclone flaming nozzle
CN208750705U (en) A kind of torch oil gun

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190212

RJ01 Rejection of invention patent application after publication