CN214141593U

CN214141593U - Processing equipment for lithium iron phosphate based on CVD (chemical vapor deposition) process

Info

Publication number: CN214141593U
Application number: CN202022458478.2U
Authority: CN
Inventors: 渡边一矢; 钟海
Original assignee: Foshan Gaosha Industrial Kiln Co ltd
Current assignee: Foshan Gaosha Industrial Kiln Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-09-07
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a processing equipment for lithium iron phosphate is based on CVD technology relates to CVD technology processing equipment field, and the leakproofness that exists to current processing equipment is poor, very easily sneaks into the air, influences product quality, has CVD gas leakage risk, has the potential safety hazard, can't carry out the problem of CVD production, now proposes following scheme, and it includes entry replacement room, roller kiln body structure is installed to entry replacement room lateral wall, roller kiln body structure includes incubator, thermostated container, cooler bin, CVD gas and squeezes into pipe, cooling water shower nozzle, roller conveyor belt and electric heater, roller kiln body structure keeps away from one side of entry replacement room and installs export replacement room, roller kiln body structure lateral wall installs fixed knot and constructs. The utility model discloses novel structure, and sealed effectual, sealed persistence is strong, production safe and reliable practices thrift use cost, accomplishes CVD cladding technology, avoids CVD cladding dead angle, optimizes CVD cladding effect.

Description

Processing equipment for lithium iron phosphate based on CVD (chemical vapor deposition) process

Technical Field

The utility model relates to a CVD technology processing equipment field especially relates to a processing equipment that is used for lithium iron phosphate to be based on CVD technology.

Background

When lithium iron phosphate is fired, liquid CVD gas needs to be converted into a gas state at a high temperature in a trace oxygen environment and then cracked, the cracked product is uniformly coated on the surface of the lithium iron phosphate, the trace oxygen environment generally requires that the oxygen content in a kiln is below tens of ppm, and the method for achieving the oxygen content in the kiln below tens of ppm usually comprises the steps of injecting inert gas with the concentration of 99.999 percent or above into the kiln to replace air in the kiln.

The most approximate equipment that uses in the existing market is ordinary continuous roller kiln body structure, carry the raw materials from roller kiln body structure entry to export, loop through the section of rising the temperature, thermostatted phase and cooling zone are burnt, but current equipment is usually unable to accomplish sealedly, perhaps leakproofness is poor again, very easily sneak into air, influence product quality, inert gas and CVD gas need be squeezed into during production, because current equipment's structural seal nature is poor, there is CVD gas leakage risk, CVD gas leakage has very big potential safety hazard, and the air can't be replaced in the kiln, can't reach the production requirement, can't carry out CVD production, whole compound degree is high, equipment production degree of difficulty is higher, therefore, in order to solve this type of problem, we have proposed a processing equipment based on CVD technology for lithium iron phosphate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a processing equipment for lithium iron phosphate is based on CVD technology has solved the leakproofness that current processing equipment exists poor, very easily sneaks into the air, influences product quality, has CVD gas leakage risk, has the potential safety hazard, can't carry out the problem of CVD technology production.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a processing equipment for lithium iron phosphate is based on CVD technology, includes entry replacement room, roller kiln body structure is installed to entry replacement room lateral wall, roller kiln body structure includes incubator, thermostated container, cooler bin, CVD gas and squeezes into pipe, cooling water shower nozzle, roller conveyor belt and electric heater, roller kiln body structure keeps away from one side of entry replacement room and installs export replacement room, roller kiln body structure lateral wall installs fixed knot and constructs, fixed knot constructs including fixed block and support base, roller kiln body structure installs exhaust structure on top, exhaust structure includes exhaust treatment furnace, dust collector and exhaust fan, roller kiln body structure keeps away from one side of exhaust structure and installs gas and squeezes into the structure, gas squeezes into the structure and includes inert gas and squeeze into the pipeline and inert gas and squeeze into the valve.

Preferably, the inert gas is squeezed into the pipeline and is evenly distributed at rising temperature case, thermostated container and cooler bin lateral wall, and the inert gas is squeezed into the pipeline and all runs through the lateral wall of rising temperature case, thermostated container and cooler bin, the valve is squeezed into to the inert gas and installs the one end that is close to rising temperature case, thermostated container and cooler bin at the inert gas pipeline of squeezing into.

Preferably, incubator and cooler bin are connected to the thermostated container, the entry replacement room is connected with one side that the incubator is kept away from to the incubator, the export replacement room is connected with one side that the thermostated container was kept away from to the cooler bin, the gaseous pipe of squeezing into of CVD is located the thermostated container inboard, the cooling water shower nozzle is located the cooler bin inboard, electric heater is evenly distributed at incubator and thermostated container inboard, the roll table conveyer belt runs through incubator, thermostated container and cooler bin.

Preferably, the roller kiln body structure runs through the fixed block, the fixed block bottom lateral wall and support base fixed connection, the fixed block and support base all use the axis of roller kiln body structure to be the symmetric distribution as the symmetry axis.

Preferably, the exhaust treatment furnace is connected with the top end of the roller kiln body structure, the exhaust treatment furnace is connected with the side wall of the roller kiln body structure, an exhaust port on one side of the exhaust treatment furnace, which is far away from the roller kiln body structure, is connected with an inlet of a dust collector, and an output port on one side of the dust collector, which is far away from the exhaust treatment furnace, is connected with an input port of an exhaust fan.

Preferably, the joints of the inlet replacement chamber, the roller kiln body structure, the outlet replacement chamber, the fixing structure, the exhaust structure and the gas pumping structure are provided with a sealing connecting block and a sealing gasket.

The utility model has the advantages that:

1. carry out sealing process to each hookup location of kiln through setting up sealing material for the inert gas and the CVD gas of beating into can not leak, make equipment can reach the required trace oxygen environmental requirement of lithium iron phosphate calcination when using, can keep under this state for a long time, optimize sealed effect, strengthen sealed persistence, make production safe and reliable, reduced inert gas and CVD gaseous use amount when guaranteeing the gas tightness, practiced thrift use cost.

2. The CVD gas injection pipe is arranged in the thermostat, and the CVD gas injection nozzle is designed in the whole thermostat section, so that the CVD gas can participate in burning when the highest temperature is reached, and is uniformly sprayed, the CVD coating process is completed, the CVD coating dead angle is avoided, and the CVD coating effect is optimized.

In conclusion, the equipment has the advantages of good sealing effect, strong sealing durability, safe and reliable production, use cost saving, completion of the CVD coating process, avoidance of CVD coating dead angles and optimization of the CVD coating effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Reference numbers in the figures: 1. an inlet replacement chamber; 2. an exhaust structure; 201. an exhaust gas treatment furnace; 202. A dust collector; 203. an exhaust fan; 3. a temperature raising box; 4. a thermostat; 5. a cooling tank; 6. An outlet replacement chamber; 7. pumping inert gas into the pipeline; 8. the inert gas is pumped into the valve; 9. a fixed block; 10. a support base; 11. injecting CVD gas into the pipe; 12. cooling water spray heads; 13. a roller conveyor belt; 14. an electric heater.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, a processing equipment for lithium iron phosphate based on CVD technology, includes entry replacement chamber 1, roller kiln body structure is installed to entry replacement chamber 1 lateral wall, roller kiln body structure includes incubator 3, thermostated container 4, cooler bin 5, CVD gas squeezes into pipe 11, cooling water shower nozzle 12, roller conveyor 13 and electric heater 14, roller kiln body structure keeps away from one side of entry replacement chamber 1 and installs export replacement chamber 6, roller kiln body structure lateral wall installs fixed knot and constructs, fixed knot constructs including fixed block 9 and support base 10, roller kiln body structure installs exhaust structure 2 in the top, exhaust structure 2 includes exhaust treatment furnace 201, dust collector 202 and exhaust fan 203, roller kiln body structure keeps away from one side of exhaust structure 2 and installs the gas and squeezes into the structure, the gas squeezes into the structure and includes inert gas squeezes into pipeline 7 and inert gas and squeezes into valve 8, the inert gas is squeezed into pipeline 7 and is evenly distributed at rising temperature case 3,

thermostated container

4 and 5 lateral walls of cooler bin, and inert gas squeezes into pipeline 7 and all runs through the lateral walls of rising temperature case 3, thermostated container 4 and cooler bin 5, inert gas squeezes into valve 8 and installs the one end that inert gas squeezes into pipeline 7 and is close to rising temperature case 3, thermostated container 4 and cooler bin 5, rising temperature case 3 and cooler bin 5 are connected to thermostated container 4, entry replacement room 1 is connected with one side that rising temperature case 3 kept away from thermostated container 4, export replacement room 6 is connected with one side that thermostat bin 4 was kept away from to cooler bin 5, CVD gas is squeezed into pipe 11 and is located thermostated container 4 inboard, cooling water shower nozzle 12 is located cooler bin 5 inboard, electric heater 14 is evenly distributed at rising temperature case 3 and thermostated container 4 inboard, roll table conveyer belt 13 runs through rising temperature case 3, thermostated container 4 and cooler bin 5, roller kiln body structure runs through

fixed block

9, 9 bottom lateral walls of fixed block and support base 10 fixed connection, fixed block 9 and support base 10 all use the axis of roller kiln body structure to be the symmetric distribution as the symmetry axis, exhaust treatment furnace 201 is connected with the top of roller kiln body structure, and exhaust treatment furnace 201 and roller kiln body structure's lateral wall, exhaust treatment furnace 201 keeps away from the gas vent of one side of roller kiln body structure and the entry linkage of dust collector 202, dust collector 202 keeps away from the delivery outlet of exhaust treatment furnace 201 one side and exhaust fan 203's input port connection, entry replacement room 1, roller kiln body structure, export replacement room 6, fixed knot construct, exhaust structure 2 and the junction that the structure was squeezed into to the gas all are provided with sealing connection piece and seal gasket.

The working principle is as follows: when the processing equipment for the lithium iron phosphate based on the CVD process is used, firstly, lithium iron phosphate to be sintered is filled into a graphite container, an inlet replacement chamber 1 is opened according to a kiln temperature rising curve, the lithium iron phosphate to be sintered is placed into a roller kiln body structure from the inlet replacement chamber 1, a roller conveyor belt 13, an inert gas injection valve 8, an electric heater 14, an exhaust structure 2, a CVD gas injection pipe 11, a cooling water spray head 12 and an outlet replacement chamber 6 in the roller kiln body structure are immediately opened according to transmission requirements, the roller conveyor belt 13 rotates and moves in work, so that the raw material of the lithium iron phosphate to be sintered is conveyed through the roller conveyor belt 13 in the roller kiln body structure, the raw material is sequentially sintered through a temperature rising section, a constant temperature section and a cooling section, the inert gas injection valve 8 is opened in an open state in the sintering process, and the inert gas is injected into a pipeline 7 and the inert gas injection valve 8, the roller kiln body structure can reach the requirement of micro oxygen environment required by lithium iron phosphate sintering, the electric heater 14 works to heat the roller kiln body structure for sintering, the exhaust structure 2 works to discharge gas generated by sintering into the exhaust treatment furnace 201, the exhaust treatment furnace 201 burns the gas, harmful gas or asphalt in tail gas is treated, then the gas reaches the dust collector 202 through a pipeline, dust generated in the combustion process is filtered and collected, finally the gas discharged into the atmosphere meets the emission standard, the gas is discharged through the exhaust fan 203, the CVD gas in the constant temperature section is pumped into the pipe 11 through the CVD gas pumped into the roller kiln body structure through the CVD gas pumped into the pipe 11 and is uniformly sprayed, so that the CVD gas can participate in sintering when the lithium iron phosphate raw material is sintered at the highest temperature, and the CVD gas after being pumped is immediately cracked at the high temperature, the cracked product is uniformly coated on the surface of the lithium iron phosphate raw material to meet the process performance requirement, the cooling water spray head 12 is started at the cooling section, so that the cooling water uniformly cools the lithium iron phosphate raw material sintered inside the roller kiln body structure through the cooling water spray head 12 to finish sintering, and the sintered product is aligned in the outlet replacement chamber 6 and then transferred to an external circulation line.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a processing equipment for lithium iron phosphate is based on CVD technology, includes entry replacement room (1), its characterized in that, roller kiln body structure is installed to entry replacement room (1) lateral wall, roller kiln body structure includes rising temperature case (3), thermostated container (4), cooler bin (5), CVD gas and squeezes into pipe (11), cooling water shower nozzle (12), roller conveyor belt (13) and electric heater (14), roller kiln body structure keeps away from one side of entry replacement room (1) and installs export replacement room (6), roller kiln body structure lateral wall installs fixed knot and constructs, fixed knot constructs including fixed block (9) and supporting base (10), exhaust structure (2) is installed on roller kiln body structure top, exhaust structure (2) are including exhaust treatment stove (201), dust collector (202) and exhaust fan (203), the roller kiln body structure is kept away from one side of exhaust structure (2) and is installed gas and squeeze into the structure, gas is squeezed into the structure and is squeezed into pipeline (7) and inert gas and squeeze into valve (8) including inert gas, entry replacement room (1), roller kiln body structure, export replacement room (6), fixed knot construct, exhaust structure (2) and the junction that gas squeezed into the structure all are provided with sealing connection piece and seal gasket.

2. The processing equipment for the lithium iron phosphate based on the CVD process according to claim 1, wherein the inert gas driving pipelines (7) are uniformly distributed on the side walls of the heating box (3), the constant temperature box (4) and the cooling box (5), the inert gas driving pipelines (7) penetrate through the side walls of the heating box (3), the constant temperature box (4) and the cooling box (5), and the inert gas driving valve (8) is installed at one end, close to the heating box (3), the constant temperature box (4) and the cooling box (5), of the inert gas driving pipelines (7).

3. The processing equipment for the lithium iron phosphate based on the CVD process according to claim 1, wherein the thermostat (4) is connected with the heating box (3) and the cooling box (5), the inlet replacement chamber (1) is connected with one side of the heating box (3) far away from the thermostat (4), the outlet replacement chamber (6) is connected with one side of the cooling box (5) far away from the thermostat (4), the CVD gas is injected into the pipe (11) and is located on the inner side of the thermostat (4), the cooling water spray head (12) is located on the inner side of the cooling box (5), the electric heaters (14) are uniformly distributed on the inner sides of the heating box (3) and the thermostat (4), and the roller conveyor belt (13) penetrates through the heating box (3), the thermostat (4) and the cooling box (5).

4. The processing equipment for the lithium iron phosphate based on the CVD process according to claim 1, wherein the roller kiln body structure penetrates through a fixing block (9), the side wall of the bottom end of the fixing block (9) is fixedly connected with a supporting base (10), and the fixing block (9) and the supporting base (10) are symmetrically distributed by taking the central axis of the roller kiln body structure as a symmetry axis.

5. The processing equipment for the lithium iron phosphate based on the CVD process according to claim 1, wherein the exhaust gas treatment furnace (201) is connected with the top end of the roller kiln body structure, the exhaust gas treatment furnace (201) is connected with the side wall of the roller kiln body structure, an exhaust port on one side of the exhaust gas treatment furnace (201) far away from the roller kiln body structure is connected with an inlet of a dust collector (202), and an output port on one side of the dust collector (202) far away from the exhaust gas treatment furnace (201) is connected with an input port of an exhaust fan (203).