Expandable graphite preparation device with negative pressure feeding device

Abstract

The utility model provides an expandable graphite preparation device with a negative pressure feeding device, which relates to the field of preparation of expandable graphite and comprises a storage tank and a stirrer connected with the storage tank through a feeding pipe. A negative pressure fan is mounted on the stirrer; a booster pump is installed on one side of the bottom of the material storage tank, and an air outlet of the booster pump is connected with the material storage tank. Compared with the prior art, the negative pressure fan and the booster pump are additionally arranged, automatic feeding can be achieved, a series of safety problems caused by manual feeding are solved, labor cost is saved, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of expandable graphite preparation, in particular to an expandable graphite preparation device with a negative pressure feeding device. Background Art

[0002] Expandable graphite is a graphite intercalation compound produced under liquid phase reaction conditions using inorganic acids such as sulfuric acid, phosphoric acid, and nitric acid or organic acids such as formic acid, acetic acid, and oxalic acid as intercalation agents, and potassium permanganate, hydrogen peroxide, and the like as oxidants. Expandable graphite is widely used in the fields of chemical industry, materials, energy, environmental protection, and building materials. The existing industrial preparation method of expandable graphite is to use concentrated sulfuric acid and hydrogen peroxide solution for reaction. Concentrated sulfuric acid must be added first, and then graphite powder and hydrogen peroxide solution are poured in. When adding materials manually, a large amount of graphite dust will be generated during the process of pouring graphite powder, and it is also easy to cause problems such as splashing of concentrated sulfuric acid. The irritating gas of concentrated sulfuric acid will also cause great damage to the human body. In addition, since large-scale agitators require more resources to work, as much material as possible will be processed at one time, and the agitator is too high, so it is inconvenient to add materials manually. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an expandable graphite preparation device with a negative pressure feeding device, which solves the problem of requiring manual feeding in the prior art.

[0004] According to an embodiment of the utility model, an expandable graphite preparation device with a negative pressure feeding device includes a storage tank and an agitator connected to the storage tank through a feeding pipe; a negative pressure fan is installed at the connection between the agitator and the feeding pipe, and the function of the negative pressure fan is to suck graphite powder from the storage tank into the agitator.

[0005] A booster pump is installed on one side of the bottom of the storage tank, and the air outlet of the booster pump is connected to the storage tank, and an air inlet is installed on the other side of the booster pump. A valve is installed on the side of the feed pipe close to the storage tank. The booster pump can put the storage tank in a high-pressure environment, and when the valve in the feed pipe is opened, the graphite powder can be better sent to the agitator.

[0006] A filter screen is also provided between the negative pressure fan and the agitator to prevent graphite powder from being sucked into the negative pressure fan during feeding, thereby causing problems such as damage to the fan.

[0007] A stirring claw is installed inside the stirrer, and the stirring claw is driven to rotate by the motor above the stirring claw to perform stirring work.

[0008] The side wall of the agitator is equipped with a first water inlet pipe and a second water inlet pipe above the first water inlet pipe, the first water inlet pipe is fed with concentrated sulfuric acid, the second water inlet pipe is fed with hydrogen peroxide solution, and the inner wall of the agitator, the first water inlet pipe and the second water inlet pipe are all made of acid-resistant and alkali-resistant materials. Concentrated sulfuric acid and hydrogen peroxide are raw materials for industrial preparation of expandable graphite.

[0009] A discharge port is provided below the agitator, and after the reaction is completed, all materials are discharged through the discharge port for subsequent treatments such as water washing steps.

[0010] The storage tank is provided with a feeding port on the top, which is hinged to the storage tank, and sealing strips are provided at the upper and lower parts of the feeding port where it contacts the storage tank, so as to avoid the waste of resources of the booster pump when the storage tank is not airtight. The agitator is also in an airtight state after the feeding is completed, so as to ensure the negative pressure environment in the agitator.

[0011] The technical principle of the utility model is: firstly, concentrated sulfuric acid is introduced into the stirrer, the negative pressure fan is turned on, and the booster pump is turned on; after the concentrated sulfuric acid is introduced, the valve is opened, and graphite powder enters the stirrer through the feed pipe, and finally hydrogen peroxide is introduced for reaction.

[0012] Compared with the prior art, the utility model has the following beneficial effects: by adopting a negative pressure fan and a booster pump, it solves the technical problem of manual feeding, avoids the difficulty in manual operation, and circumvents the safety hazards caused by improper manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0014] In the above drawings: 1. Storage tank; 101. Feeding port 2. Feeding pipe; 201. Valve 3. Agitator; 301. Agitating claw; 302. Motor; 304. Discharging port; 4. Negative pressure fan; 401. Filter; 5. Booster pump; 501. Air inlet; 502. Air outlet; 6. Second water inlet pipe; 7. First water inlet pipe. DETAILED DESCRIPTION

[0015] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] like Figure 1 As shown, an embodiment of the utility model proposes a feeding device for preparing expandable graphite, including a storage tank 1, and a stirrer 3 connected to the storage tank 1 through a feeding pipe 2; a negative pressure fan 4 is installed at the connection between the stirrer 3 and the feeding pipe 2, and a filter screen 401 is also arranged in the middle of the connection between the negative pressure fan 4 and the stirrer 3, which can prevent graphite powder from entering the negative pressure fan 4 and causing wear of the negative pressure fan 4.

[0018] A booster pump 5 is installed on one side of the bottom of the material storage tank 1 , an air outlet 502 of the booster pump 5 is connected to the material storage tank 1 , and an air inlet 501 is installed on the other side of the booster pump 5 .

[0019] A feeding port 101 is provided above the storage tank 1. During the feeding process of the storage tank 1, the staff needs to wear dust masks and goggles, and turn on the dust removal system configured in the factory. The feeding port 101 is hinged to the storage tank 1 above, and sealing strips are provided at the upper and lower parts of the feeding port 101 that contact the storage tank 1, so that the graphite powder in the storage tank 1 is in a closed state, not easily affected by moisture, and can also be in a high-pressure environment under the action of the booster pump 5. The function of the booster pump 5 is to ensure the high-pressure environment in the storage tank 1 after the graphite powder enters the storage tank 1, so that there is a large pressure difference between the storage tank 1 and the agitator 3, and the booster pump 4 has the function of blowing air, which can loosen the graphite powder and improve the feeding efficiency.

[0020] A valve 201 is installed on the side of the feed pipe 2 close to the storage tank 1. Its function is to ensure that the high-pressure environment in the storage tank 1 and the negative-pressure environment in the agitator 3 do not affect each other when the valve 201 is not opened; after the valve 201 is opened, due to the large pressure difference between the storage tank 1 and the agitator 3, the graphite powder in the storage tank 1 can smoothly enter the agitator 5.

[0021] The side wall of the stirrer 3 is provided with a first water inlet pipe 7 and a second water inlet pipe 6 above the first water inlet pipe 7. The function of the first water inlet pipe 7 is to introduce concentrated sulfuric acid, and the function of the second water inlet pipe 6 is to introduce hydrogen peroxide solution. A stirring claw 301 is installed inside the stirrer 3, and the stirring claw 301 is driven to rotate and stir through the motor 302 above it. During the process of adding materials and reacting, the stirring claw 301 can break up the materials to make the reaction more complete. Since a large amount of heat is released during the reaction process and it is in a strong acidic environment, the stirring claw 301, the stirrer 3, the first water inlet pipe 7, and the second water inlet pipe 6 are usually made of acid-resistant and alkali-resistant materials, such as 45 steel, and the surface is painted. Since a large amount of heat is released during the reaction process and there is a lot of dust in the factory environment, a spray device is generally installed to cool the stirrer 3 and reduce dust in the factory area. The spray port of the spray device is similar to a shower head, and sprays downward from the top of the factory building.

[0022] A discharge port 304 is provided below the stirrer 3 to allow the reacted materials to be discharged smoothly for subsequent processing.

[0023] When in use, first add graphite powder into the storage tank 1 through the feeding port 101 and close and seal it, then start the booster pump 5 and the negative pressure fan 4, set the storage tank 1 to a high pressure environment, and change the agitator 3 to a negative pressure environment; after the pressurization is completed, turn off the booster pump 5, and at the same time, pass concentrated sulfuric acid into the agitator 3 through the first water inlet pipe 7, and turn on the motor 302, the stirring claw 301 starts to rotate for stirring, after the concentrated sulfuric acid is passed, open the valve 201, and use the pressure difference between the two environments to pass a certain amount of graphite powder into the agitator 3 through the feeding pipe 2, after the passing is completed, close the valve 2, and feed the storage tank 1 to prepare for the next round of reaction; continue to pass the hydrogen peroxide solution through the second water inlet pipe 6, during this process the stirring claw 301 is continuously stirred by the motor 302 to ensure sufficient reaction, after the reaction is completed, turn off the negative pressure fan 4 and the motor 302, and open the discharge port 304 for discharge.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An expandable graphite preparation device with a negative pressure feeding device, characterized in that: The invention comprises a material storage tank (1), and an agitator (3) connected to the material storage tank (1) via a feed pipe (2); a negative pressure fan (4) is installed on the agitator (3); a booster pump (5) is installed on one side of the bottom of the material storage tank (1), and an air outlet (502) of the booster pump (5) is connected to the material storage tank (1).

2. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: A filter screen (401) is also provided at the connection between the negative pressure fan (4) and the stirrer (3).

3. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: A stirring claw (301) is installed inside the stirrer (3), and the stirring claw (301) is driven to rotate and stir by a motor (302) above it.

4. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: The side wall of the agitator (3) is provided with a first water inlet pipe (7) and a second water inlet pipe (6) above the first water inlet pipe (7).

5. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: A discharge port (304) is provided below the stirrer (3).

6. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: A valve (201) is installed in the feed pipe (2) on the side close to the storage tank (1).

7. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: A feeding port (101) is provided above the material storage tank (1), the feeding port (101) is hinged to the material storage tank (1) above, and a sealing strip is provided at the contact point between the feeding port (101) and the material storage tank (1) below.

8. The expandable graphite preparation device with a negative pressure feeding device according to claim 1, characterized in that: The booster pump is also provided with an air inlet (501).

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