Device for recovering phosphorus from graphitized tail gas of phosphorus-containing carbon material

Abstract

The utility model relates to a device for recovering phosphorus in graphitized tail gas of a phosphorus-containing carbon material, in particular to the technical field of ink material treatment devices. Comprising a furnace body, a gas treatment pipeline, an anti-blocking mechanism, a gas inlet pipe, a blow-off pipe and a deposition plate. The phenomenon that ash volatile matters generated in the graphite purification process contain phosphorus, and the phosphorus is extremely easy to chemically convert in a pump body, so that the load of the vacuum pump is too large, and the vacuum pump is stuck and shut down is avoided; and as the ash volatile matters are mixed with phosphorus-containing substances, the blockage phenomenon is easily caused, and the high-temperature purification efficiency in the phosphorus-containing carbon purification process becomes poor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of graphite material processing device, especially to a kind of phosphorus recovery device for phosphorus-containing carbon material graphitization tail gas. BACKGROUND

[0002] Graphitization furnace, a kind of mainly used for sintering and graphitization of carbon material, PI film graphitization, heat-conducting material graphitization, carbon fiber rope sintering, carbon fiber filament sintering graphitization, graphite powder purification and other materials that can be graphitized in carbon environment, etc. High-temperature processing. Its use temperature is as high as 3000 DEG C.

[0003] At present, in the graphitization purification process of self-produced phosphorus-containing carbon material, it is found that due to the phosphorus contained in the carbon material itself and the characteristics of high ash (ash content is 3%-8%), a large amount of ash volatilization is generated in the graphitization purification process, including metal salt and phosphorus-containing substance, which is extracted from the graphite furnace by the vacuum system. This greatly increases the filtration pressure of the filter before the vacuum pump, causing the filter element to be blocked, and the pressure difference is too large to cause the filter element to be broken, resulting in that the ash volatilization is sucked into the vacuum pump system. Since the ash volatilization contains phosphorus, it is easy to chemically transform in the pump body, produce high-concentration phosphoric acid, and after mixing with other volatile condensate, become a substance with extremely high viscosity, causing the vacuum pump to be overloaded, and causing the phenomenon of jamming and shutdown, which causes the use safety risk of the vacuum degree maintenance of the entire graphite furnace system; In addition, in the process of graphite purification, the ash volatilization is mixed with phosphorus-containing substances, which is easy to cause blockage, resulting in a significant decrease in the vacuum degree of the phosphorus-containing carbon in the purification process, and the high-temperature purification efficiency is poor. At the same time, due to the decrease of vacuum degree, the phosphorus-containing substances are again deposited in the furnace and the pipeline, which increases the difficulty of subsequent cleaning process and has the safety hazard of deflagration. UTILITY MODEL CONTENTS

[0004] (1) Technical problem to be solved

[0005] The utility model provides a kind of phosphorus recovery device for phosphorus-containing carbon material graphitization tail gas, overcome the ash volatilization generated in the process of graphite purification contains phosphorus, phosphorus is easy to chemically transform in the pump body, cause the phenomenon of vacuum pump overload and jamming and shutdown;And because its ash volatilization is mixed with phosphorus-containing substances, it is easy to cause blockage, resulting in the problem of poor high-temperature purification efficiency in the purification process of phosphorus-containing carbon.

[0006] (2) Technical scheme

[0007] In order to solve the above technical problems, the utility model provides a kind of phosphorus recovery device for phosphorus-containing carbon material graphitization tail gas, including furnace body, gas treatment pipeline, anti-blocking mechanism, gas inlet pipe, blowdown pipe, deposition plate;

[0008] The furnace body is provided with three or more than three; the furnace body is provided with the gas treatment pipeline above for gas discharge; the gas treatment pipeline is provided with the anti-blocking mechanism; the first electric valve is arranged above the gas treatment pipeline; the gas inlet pipe for gas entering is arranged at the bottom right side of the furnace body; the second electric valve is arranged on the gas inlet pipe; the water inlet pipe is arranged at the top of the furnace body; the spray valve is arranged on the water inlet pipe and communicates with the external water pipe; the sewage discharge pipe for sewage discharge is arranged at the bottom of the furnace body; the sewage valve is arranged on the sewage discharge pipe; the first vacuum pipeline for raw material entering is arranged below the left side of the furnace body; the second vacuum pipeline for raw material output is arranged above the right side of the furnace body; and the deposition plate is arranged in the furnace body.

[0009] Preferably, the anti-blocking mechanism comprises an arc-shaped plate, a plug rod, a sealing gasket, a limiting block, a reset spring and a scraper.

[0010] The gas treatment pipeline is internally provided with a pair of arc-shaped plates; the plug rod is arranged on the wall of the gas treatment pipeline; the end face of the plug rod on the outer wall of the gas treatment pipeline is provided with the sealing gasket; one end of the plug rod penetrates through the sealing gasket and is provided with the limiting block at the outer end; the other end of the plug rod penetrates into the gas treatment pipeline and is fixedly connected with the arc-shaped plate; the limiting block and the sealing gasket are connected with the reset spring, and the reset spring is sleeved on the plug rod at the outer end of the pipeline.

[0011] Preferably, the arc-shaped plate is fixedly connected with the scraper towards the inside of the gas treatment pipeline.

[0012] Preferably, the scraper is made of a corrosion-resistant metal material capable of adsorbing phosphorus.

[0013] Preferably, the second vacuum pipeline is connected with a pump through a filter.

[0014] Preferably, the sewage discharge pipe is connected with a pre-vacuum pump group.

[0015] (3) Beneficial effects

[0016] The phosphorus recovery device for phosphorus-containing carbon material graphitization tail gas provided by the utility model overcomes the problem that phosphorus is contained in ash volatilization in the process of graphite purification, and the phosphorus is prone to chemical transformation in the pump body, resulting in excessive load of the vacuum pump and causing the phenomenon of jamming and shutdown; and the ash volatilization contains phosphorus-containing substances, which easily causes the phenomenon of blockage, resulting in the problem of poor high-temperature purification efficiency in the process of phosphorus-containing carbon purification.

[0017] 1. In the process of graphite purification, the ash volatilization generated in the process of graphite purification is treated by increasing the furnace body before the vacuum pump filtration, which greatly relieves the problem of excessive load of the vacuum pump and easy jamming and shutdown.

[0018] 2、 The utility model discloses a plurality of graphitization furnaces are set up, and the substances in ash volatile matter are handled through using two methods, and the safety factor of the whole graphite purification system is improved.

[0019] 3、 The utility model discloses set up anti -blocking mechanism, relieve the problem that phosphorus pentoxide smoke is discharged from gas treatment pipeline, and will block the pipeline in the long -term working process. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure diagram of the phosphorus recovery device for phosphorus-containing carbon material graphitization tail gas is provided for the utility model;

[0021] Figure 2 The structure diagram of the enlarged portion in the A place in the utility model; Figure 1

[0022] Figure 3 The cross section schematic view of the gas treatment pipeline inside in the utility model;

[0023] Figure 4 The cross section schematic view of the gas treatment pipeline inside in the utility model;

[0024] Figure 5 The structure diagram of the enlarged portion in the B place in the utility model; Figure 3

[0025] Reference signs: 1-furnace body, 2-gas treatment pipeline, 3-anti -blocking mechanism, 31-arc plate, 32-inserting rod, 33-sealing pad, 34-limiting block, 35-return spring, 36-scraping plate, 4-first electric valve, 5-gas inlet pipe, 6-second electric valve, 7-water inlet pipe, 8-spraying valve, 9-drain pipe, 10-drain valve, 11-first vacuum pipeline, 12-second vacuum pipeline, 13-deposition plate, 14-filter, 15-pump, 16-pre-vacuum pump set. DETAILED DESCRIPTION

[0026] The utility model is further explained in connection with the drawings and examples.

[0027] As Figures 1-4 The utility model discloses a kind of phosphorus recovery device for phosphorus-containing carbon material graphitization tail gas, a kind of automatic program-controlled system and device for phosphorus recovery in phosphorus-containing carbon material graphitization tail gas, it is characterized in that, including furnace body 1, gas treatment pipeline 2, anti -blocking mechanism 3, gas inlet pipe 5, drain pipe 9, deposition plate 13;

[0028] ​​The furnace body 1 is provided with three or more than three; the furnace body 1 is provided with the gas treatment pipeline 2 for gas exhaust system for the smoke of phosphorus pentoxide generated by the gas treatment pipeline 2 into the gas washing tower for cleaning; the gas treatment pipeline 2 is provided with the anti-blocking mechanism 3; the first electric valve 4 is arranged above the gas treatment pipeline 2; the first electric valve 4 is used for controlling the gas exhaust work; the gas inlet pipe 5 for gas entering is arranged at the bottom right side of the furnace body 1; the second electric valve 6 is arranged on the gas inlet pipe 5; the water inlet pipe 7 is arranged at the top of the furnace body 1; the spray valve 8 is arranged on the water inlet pipe 7, and the spray valve 8 is communicated with the external water pipe; the sewage discharge pipe 9 for sewage discharge is arranged at the bottom of the furnace body 1; the sewage valve 10 is arranged on the sewage discharge pipe 9; the first vacuum pipeline 11 for raw material entering is arranged below the left side of the furnace body 1; the second vacuum pipeline 12 for raw material output is arranged above the right side of the furnace body 1; the deposition plate 13 is arranged in the furnace body 1.

[0029] The anti-blocking mechanism 3 comprises an arc-shaped plate 31, a plug rod 32, a sealing gasket 33, a limiting block 34, a reset spring 35 and a scraper 36.

[0030] A pair of the arc-shaped plates 31 are arranged in the gas treatment pipeline 2; the plug rod 32 is arranged in the wall of the gas treatment pipeline 2; the sealing gasket 33 is arranged on the end face of the outer wall of the gas treatment pipeline 2; one end of the plug rod 32 penetrates through the sealing gasket 33, and the outer end is provided with the limiting block 34; the other end of the plug rod 32 penetrates into the gas treatment pipeline 2 and is fixedly connected with the arc-shaped plate 31; the reset spring 35 is connected between the limiting block 34 and the sealing gasket 33, and the reset spring 35 is sleeved on the plug rod 32 at the outer end of the pipeline.

[0031] The scraper 36 is fixedly connected to the arc-shaped plate 31 towards the inside of the gas treatment pipeline 2.

[0032] The scraper 36 is made of a corrosion-resistant metal material capable of adsorbing phosphorus.

[0033] The second vacuum pipeline 12 is connected with the pump 15 through the filter 14.

[0034] The sewage discharge pipe 9 is connected with the pre-vacuum pump group 16.

[0035] Working principle: the system comprises three or more than three phosphorus recovery and deposition devices, i.e. the furnace body 1, which can be used alternately by automatic program control system, or can be used simultaneously in parallel.

[0036] When Method 1 is used in parallel: When the phosphorus recovery and deposition device enters the phosphorus recovery process, the first electric valve 4 and the second electric valve 6 are opened. The air system injects a large amount of air into the furnace body 1 and heats the air to 50-60°C, promoting the combustion of white phosphorus deposited on the deposition plate 13. The exhaust system then extracts the resulting phosphorus pentoxide fumes to the scrubber for phosphorus recovery. Through temperature monitoring, when the temperature inside the device drops by more than 5°C, the second electric valve 6 on the air intake is closed. When the spray valve 8 opens and the drain valve 10 is opened simultaneously, the system automatically reduces the exhaust system power and injects spray water to flush the deposition plate 13. When the flushing time is reached, the spray valve 8 is closed and the air valve 6 is opened again, allowing air to enter and heat it to 120-150°C to dry the interior of the furnace body 1. When the set drying time is reached, the heating system is turned off. After a 10-minute delay, the second electric valve 6 on the air intake pipe 5 is closed, and the first electric valve 4 on the air outlet pipe and the exhaust system are also closed.

[0037] Enter the pre-vacuum program to evacuate the dried phosphorus recovery and deposition device. When the vacuum degree is less than 1000 Pa, the pre-vacuum program automatically closes the vacuum valve and then the pre-vacuum pump group 16, and the phosphorus recovery and deposition device enters the standby mode.

[0038] When using method 2 alternately: Figure 1 Taking the three phosphorus recovery and deposition devices included in as an example, through program setting, the first phosphorus recovery and deposition device is started, which is the furnace body 1 described in this article. After the set time is reached, the system automatically shuts down the first phosphorus recovery and deposition device. Start the second phosphorus recovery and deposition device, and at the same time start the phosphorus recovery program of the first phosphorus recovery and deposition device. When the second phosphorus recovery and deposition device reaches the operating time, the system automatically shuts down the second phosphorus recovery and deposition device, starts the third phosphorus recovery and deposition device, and the first phosphorus recovery and deposition device enters the phosphorus recovery program. At this time, the first phosphorus recovery and deposition device is in standby mode, and so on and so forth, operating alternately. Contents not described in detail in this specification belong to the prior art known to professionals and technicians in this field.

[0039] Pushing the limit block 34 can move the arc 31, and the arc plate 31 drives the scraper 36 to move, so as to achieve mutual scraping between 36, prevent internal blockage, and further improve the purification efficiency of carbon-phosphorus.

[0040] The above-described embodiments merely represent preferred embodiments of the present invention, and their descriptions are relatively specific and detailed. However, the present invention is not limited to these embodiments. It should be noted that any improvements made without departing from the spirit of the present invention are within the scope of protection of the present invention. Therefore, the scope of protection of this utility model patent shall be based on the appended claims.

Claims

1. A device for recovering phosphorus from a graphitization tail gas of a phosphorus-containing carbon material, characterized by comprising: It comprises a furnace body (1), a gas treatment pipeline (2), a anti-blocking mechanism (3), an air inlet pipe (5), a sewage pipe (9), a deposition plate (13); The furnace body (1) is provided with three or more than three; the furnace body (1) is provided with the gas treatment pipeline (2) for gas discharge above; the gas treatment pipeline (2) is provided with the anti-blocking mechanism (3) inside; the gas treatment pipeline (2) is provided with the first electric valve (4) above; the furnace body (1) is provided with the air inlet pipe (5) for gas entering at the bottom right side; the air inlet pipe (5) is provided with the second electric valve (6); the furnace body (1) is provided with the water inlet pipe (7) at the top; the water inlet pipe (7) is provided with the spray valve (8), and the spray valve (8) is communicated with the external water pipe; the bottom of the furnace body (1) is provided with the sewage pipe (9) for sewage discharge; the sewage pipe (9) is provided with the sewage valve (10); the left side of the furnace body (1) is provided with the first vacuum pipeline (11) for raw material entering below; the right side of the furnace body (1) is provided with the second vacuum pipeline (12) for raw material output above; the furnace body (1) is provided with the deposition plate (13) inside.

2. A device for recovering phosphorus from a graphitization tail gas containing phosphorus carbon material according to claim 1, characterized in that, The anti-blocking mechanism (3) comprises an arc plate (31), a plug rod (32), a sealing gasket (33), a limiting block (34), a reset spring (35), and a scraper (36); The gas treatment pipeline (2) is provided with a pair of arc plates (31) inside; the plug rod (32) is inserted into the wall of the gas treatment pipeline (2); the end face of the plug rod (32) located on the outer wall of the gas treatment pipeline (2) is provided with the sealing gasket (33); one end of the plug rod (32) penetrates the sealing gasket (33), and the outer end is provided with the limiting block (34); the other end of the plug rod (32) penetrates into the gas treatment pipeline (2) and is fixedly connected with the arc plate (31); the limiting block (34) and the sealing gasket (33) are connected with the reset spring (35), and the reset spring (35) is sleeved on the plug rod (32) at the outer end of the pipeline.

3. A device for recovering phosphorus from a graphitization tail gas containing phosphorus carbon material according to claim 2, characterized in that, The arc plate (31) is fixedly connected with the scraper (36) towards the inside of the gas treatment pipeline (2).

4. A device for recovering phosphorus from a graphitization tail gas containing phosphorus carbon material according to claim 3, characterized in that, The scraper (36) is made of corrosion-resistant metal material capable of adsorbing phosphorus.

5. The device for recovering phosphorus from the graphitization tail gas of phosphorus-containing carbon material according to claim 1, characterized in that, The second vacuum pipeline (12) is connected with the pump (15) through the filter (14).

6. The device for recovering phosphorus from the graphitization tail gas of phosphorus-containing carbon material according to claim 1, characterized in that, The sewage pipe (9) is connected with the pre-vacuum pump group (16).

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