High-temperature-resistant dust removal system for oxygen emission of lithium electric furnace kiln

Abstract

The utility model relates to the technical field of lithium electric raw material production, and discloses a high-temperature-resistant dust removal system for oxygen emission of a lithium electric furnace kiln, which is characterized in that a delivery pipe is arranged on an exhaust manifold and is arranged on an ash hopper of a high-temperature-resistant dust remover; a ceramic fiber filter cartridge and a blowing pipe are arranged in the high-temperature-resistant dust remover; the ceramic fiber filter cartridge is arranged above the ash hopper, and the blowing pipe is arranged above the ceramic fiber filter cartridge; the blowing pipe penetrates out of the high-temperature-resistant dust remover, the pulse valve and the air inlet connector are installed on the blowing pipe outside the high-temperature-resistant dust remover in parallel, and the air inlet connector is located between the pulse valve and the high-temperature-resistant dust remover; a clamping sleeve joint is arranged on the air inlet joint; and a stainless steel air pipe is arranged on the clamping sleeve joint. During use, normal-temperature compressed air enters the blowing pipe through the air inlet connector, high-temperature air in the blowing pipe is isolated, the temperature of the blowing pipe on the outer side of the high-temperature-resistant dust remover is reduced, and the pulse valve is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery raw material production, and is used at the tail gas emission outlet of a lithium battery furnace, in particular to a high temperature resistant dust removal system for oxygen emission from a lithium battery furnace. Background Art

[0002] During the production process of lithium battery raw materials, ternary lithium and lithium iron phosphate, oxygen needs to be passed through the production kiln to stabilize the battery material structure and produce chemical reactions. The temperature in the production kiln is about 800℃. There is an exhaust main pipe on the top of the kiln. The exhaust gas in the kiln is collected by the exhaust branch pipe on the top of the kiln to the exhaust main pipe. There is an induced draft fan at the end of the exhaust main pipe. The exhaust gas is directly discharged into the atmosphere through the induced draft fan. The flue gas temperature at the end of the exhaust main pipe is about 550℃. The exhaust gas contains a lot of dust, and the dusty exhaust gas is directly discharged into the atmosphere through the exhaust main pipe, which seriously pollutes the atmosphere.

[0003] It is necessary to set up a high temperature resistant dust removal system to filter the exhaust gas to meet the national emission requirements and operate normally at a temperature of 600°C. Since the upper limit of the pulse valve is 200°C, ordinary pulse cleaning devices can no longer be used on dust collectors at such high temperatures, and a high temperature resistant pulse backwash cleaning system must be set up.

[0004] Related reference CN201735287U discloses a ceramic filter cartridge high-temperature dust collector, which has a shell and an ash hopper, the shell includes an upper box body and a middle box body, the ash hopper is located below the middle box body, and a high-temperature gas blowing and cleaning device is arranged in the upper box body. The blowing and cleaning device adopts a pulse cleaning method, and a heater and a pulse valve combination are arranged on the air inlet channel of the blowing and cleaning device. After the compressed air of the back-blowing air source is heated to a preset temperature by the heater, it is back-blown from each nozzle into the ceramic filter cartridge. Although back-blowing and cleaning can be achieved, it cannot be used in production furnaces with a temperature of about 800°C, and the pulse valve is easily damaged. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a high temperature resistant dust removal system for lithium battery furnace oxygen discharge, which can prevent the pulse valve from being damaged and reduce the temperature of heavy exhaust gas entering the high temperature resistant dust collector.

[0006] In order to solve the above technical problems, the utility model provides a high-temperature resistant dust removal system for oxygen emission from a lithium battery furnace, a delivery pipe is arranged on the exhaust main pipe, and the delivery pipe is installed on the ash hopper of the high-temperature resistant dust collector; a ceramic fiber filter cartridge and a blow pipe are arranged in the high-temperature resistant dust collector; the ceramic fiber filter cartridge is arranged above the ash hopper, and a blow pipe is arranged above the ceramic fiber filter cartridge; the blow pipe passes through the outside of the high-temperature resistant dust collector, and a pulse valve and an air intake joint are installed in parallel on the blow pipe outside the high-temperature resistant dust collector, and the air intake joint is located between the pulse valve and the high-temperature resistant dust collector; a ferrule joint is arranged on the air intake joint, and a stainless steel air pipe is arranged on the ferrule joint.

[0007] By adopting the above technical solution, an air inlet joint is provided on the blow pipe outside the high temperature resistant dust collector, a ferrule joint is screwed into the air inlet joint, the ferrule joint is connected to a stainless steel air pipe, and the other end of the stainless steel air pipe is connected to normal temperature compressed air. During normal use, normal temperature compressed air enters the blow pipe through the air inlet joint, isolating the high temperature gas in the blow pipe, reducing the temperature of the blow pipe outside the high temperature resistant dust collector, and preventing the pulse valve from being damaged.

[0008] Preferably, the shell material of the high temperature resistant dust collector is stainless steel.

[0009] Preferably, the frame of the high temperature resistant dust collector is made of stainless steel. By adopting the above technical solution, the present application adopts stainless steel material to ensure that the dust collector can withstand a temperature of 600°C.

[0010] Preferably, a temperature sensor is arranged in the conveying pipe. By adopting the above technical solution, the present application monitors the temperature of the exhaust gas entering the dust collector through the temperature sensor.

[0011] Preferably, an air mixing valve is provided on the delivery pipe, and the air mixing valve is located behind the temperature sensor.

[0012] By adopting the above technical solution, the present application opens the air mixing valve when the temperature of the exhaust gas entering the dust collector exceeds 600°C, thereby reducing the temperature of the exhaust gas entering the dust collector to less than 600°C.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model sets an air inlet joint on the blow pipe outside the high temperature dust collector, screws a ferrule joint into the air inlet joint, connects a stainless steel air pipe to the ferrule joint, and connects the other end of the stainless steel air pipe to normal temperature compressed air. In normal use, normal temperature compressed air enters the blow pipe through the air inlet joint, isolates the high temperature gas in the blow pipe, reduces the temperature of the blow pipe outside the high temperature dust collector, and prevents the pulse valve from being damaged.

[0015] 2. The utility model provides an air mixing valve on the conveying pipe. When the temperature of the exhaust gas entering the dust collector exceeds 600°C, the air mixing valve is opened to reduce the temperature of the exhaust gas entering the dust collector to less than 600°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of installing an air inlet connector on the blowing pipe of the utility model;

[0018] Figure 3 It is a partial enlarged view of the utility model;

[0019] Figure 4 This is a schematic diagram of installing an air mixing valve on a delivery pipe of the utility model.

[0020] Figure number: 1. High temperature resistant dust collector, 2. Ash hopper, 3. Blowing pipe, 4. Pulse valve, 5. Compression fitting, 6. Ceramic fiber filter cartridge, 7. Blowing pipe, 8. Conveying pipe, 9. Air mixing valve, 10. Ash unloading ball valve, 11. Air inlet joint, 12. Stainless steel air pipe. DETAILED DESCRIPTION

[0021] like Figure 1 As shown, a high temperature dust removal system is used for oxygen emission of lithium electric furnace, and a conveying pipe 8 is arranged on the exhaust main pipe, and the conveying pipe 8 is installed on the ash hopper 2 of the high temperature dust collector 1. A ash unloading ball valve 10 is arranged at the bottom of the ash hopper 2. A set of high temperature pulse backwashing cleaning device is configured for the high temperature dust collector 1, and a ceramic fiber filter cartridge 6 and a blowing pipe 7 are arranged in the high temperature dust collector 1. The high temperature ceramic fiber filter cartridge is used in the dust collector to replace the traditional knitted filter bag to filter the exhaust gas. The ordinary knitted filter bag can only withstand a maximum temperature of 250°C, while the ceramic fiber filter cartridge 6 can withstand a temperature of 600°C, is not easy to corrode, has a long service life, improves the high temperature resistance of the dust collector, and increases the service life of the filter. The ceramic fiber filter cartridge 6 is arranged above the ash hopper 2. The resistance of the ordinary knitted filter bag is about 1500pa, while the normal operating resistance of the ceramic fiber filter cartridge 6 can be reduced to about 1200pa, which can reduce the operating frequency of the furnace discharge fan and reduce energy consumption. A blowing pipe 7 is arranged above the ceramic fiber filter cartridge 6. The blowing pipe 7 passes through the outside of the high temperature resistant dust collector 1. The shell of the high temperature resistant dust collector 1 is made of stainless steel, and the frame of the high temperature resistant dust collector 1 is also made of stainless steel. The use of stainless steel ensures that the dust collector can withstand a temperature of 600°C.

[0022] like Figure 2 As shown, a pulse valve 4 and an air inlet connector 11 are installed in parallel on the injection pipe 7 outside the high temperature dust collector 1. The air inlet connector 11 is located between the pulse valve 4 and the high temperature dust collector 1. Figure 3 As shown, a ferrule joint 5 is provided on the air inlet joint 11, and a stainless steel air pipe 12 is provided on the ferrule joint 5. In the present application, an air inlet joint 11 is provided on the blow pipe 7 outside the high temperature resistant dust collector 1, a ferrule joint 5 is screwed into the air inlet joint 11, and the ferrule joint 5 is connected to a stainless steel air pipe 12, and the other end of the stainless steel air pipe 12 is connected to normal temperature compressed air. During normal use, normal temperature compressed air enters the blow pipe 7 through the air inlet joint 11, isolates the high temperature gas in the blow pipe 7, reduces the temperature of the blow pipe 7 outside the high temperature resistant dust collector 1, and prevents the pulse valve 4 from being damaged.

[0023] A temperature sensor is arranged in the conveying pipe 8 (not shown in the figure), and the temperature of the exhaust gas entering the dust collector is monitored by the temperature sensor.

[0024] like Figure 4As shown, a mixing air valve 9 is provided on the conveying pipe 8, and the mixing air valve 9 is located behind the temperature sensor. At the inlet of the dust collector, a fully automatic mixing air valve 9 is provided on the conveying pipe 8. When the temperature of the exhaust gas entering the dust collector exceeds 600°C, the mixing air valve 9 is automatically opened to reduce the temperature of the exhaust gas entering the dust collector to less than 600°C.

[0025] A high-temperature dust removal system is installed on the exhaust main pipe of the production furnace to filter the dust in the exhaust gas. The dust collector can withstand a temperature of 600°C. A mixing valve 9 is installed at the inlet of the dust collector to keep the temperature of the exhaust gas entering the dust collector within 600°C. An air intake joint 11 is fixedly installed on the injection pipe 3, and a ferrule joint 5 is installed on the air intake joint 11. The ferrule joint 5 is connected to the stainless steel air pipe 12, and the stainless steel air pipe 12 is connected to normal temperature compressed air. Normal temperature compressed air enters the injection pipe 3 through the air intake joint 11, isolates the high-temperature gas in the injection pipe 3, reduces the temperature of the injection pipe 3 outside the high-temperature dust collector, and prevents the pulse valve (the pulse valve of the ordinary pulse back-blowing cleaning system has a maximum temperature resistance of 200°C) from being damaged. The high-temperature dust collector of this application is used to purify the exhaust gas of the furnace, and the dust concentration of the emission is ≤5mg / m³, so that the exhaust gas emission reaches or even exceeds the requirements stipulated by the state, greatly reducing the environmental pollution of the exhaust gas.

[0026] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. High temperature resistant dust removal system for oxygen emission from lithium battery furnace, characterized by: A delivery pipe (8) is arranged on the exhaust main pipe, and the delivery pipe (8) is installed on the ash hopper (2) of the high-temperature resistant dust collector (1); a ceramic fiber filter cartridge (6) and a blow pipe (7) are arranged in the high-temperature resistant dust collector (1), the ceramic fiber filter cartridge (6) is arranged above the ash hopper (2), and the blow pipe (7) is arranged above the ceramic fiber filter cartridge (6); the blow pipe (7) passes through the outside of the high-temperature resistant dust collector (1), and a pulse valve (4) and an air intake joint (11) are installed in parallel on the blow pipe (7) outside the high-temperature resistant dust collector (1), and the air intake joint (11) is located between the pulse valve (4) and the high-temperature resistant dust collector (1); a ferrule joint (5) is arranged on the air intake joint (11), and a stainless steel air pipe (12) is arranged on the ferrule joint (5).

2. The high temperature resistant dust removal system for oxygen emission from lithium battery furnace according to claim 1, characterized in that: The shell material of the high temperature resistant dust collector (1) is stainless steel.

3. The high temperature resistant dust removal system for oxygen emission from lithium battery furnace according to claim 1, characterized in that: The frame of the high temperature resistant dust collector (1) is made of stainless steel.

4. The high temperature resistant dust removal system for oxygen emission from lithium battery furnace according to claim 1, characterized in that: A temperature sensor is arranged in the delivery pipe (8).

5. The high temperature resistant dust removal system for oxygen emission from lithium battery furnace according to claim 4, characterized in that: An air mixing valve (9) is provided on the delivery pipe (8), and the air mixing valve (9) is located behind the temperature sensor.

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