Gas phase method white carbon black deacidification device and deacidification method

Abstract

The invention discloses a gas phase method white carbon black deacidification device and a deacidification method, and relates to the technical field of chemical equipment. Comprising a deacidification furnace, the deacidification furnace comprises a shell, a deacidification cavity is formed in the shell, a baffle plate is arranged in the deacidification cavity, an input pipe is arranged on the shell, the input pipe is communicated with the deacidification cavity, one end of the shell is connected with a separator, a plurality of output pipes are arranged on the separator, the shell comprises an outer shell and an inner shell, and a plurality of mixing parts are matched to provide multiple groups of air inlet pipes for opposite impact for the mixing parts. The sprayed high-temperature water vapor scatters the fumed silica entering the mixing part through impact force, then the high-temperature water vapor and the fumed silica are fully mixed, the heating assembly heats the inner shell, the outer shell achieves heat preservation, the temperature of the deacidification cavity can continuously meet the requirement of the deacidification process, and the deacidification efficiency is improved. The fumed silica is impacted and mixed by the plurality of mixing parts in sequence, so that the fumed silica is fully mixed, the deacidification effect is good, and the final quality of the fumed silica is improved.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and more specifically, to a gas-phase deacidification device and method for silica. Background Technology

[0002] Silica is a widely used product. Existing silica production processes are generally divided into gas phase method and precipitation method. For silica produced by gas phase method, deacidification is an important process in production, and the deacidification effect directly affects the final quality of silica.

[0003] Existing methods for deacidifying silica typically involve using deacidification furnaces. The deacidification process involves heating the furnaces and injecting steam. To ensure thorough mixing, existing processes typically involve setting up multiple deacidification furnaces. The silica passes through these furnaces sequentially to obtain the final product. However, setting up multiple deacidification furnaces not only requires a large floor space but also significantly increases production costs. Furthermore, the required temperature for the process in multiple furnaces cannot be guaranteed, affecting the deacidification effect and negatively impacting the quality of the silica. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a gas-phase silica deacidification device and method, which uses multiple mixing sections within a deacidification furnace for impact mixing, ensuring thorough mixing of water vapor and gas-phase silica, resulting in a good deacidification effect.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a gas-phase silica deacidification device, comprising an aggregator, a cyclone separator, and a deacidification furnace, wherein the cyclone separator conveys the gas-phase silica in the aggregator to the deacidification furnace, the deacidification furnace comprising a shell, wherein a deacidification chamber is provided inside the shell, wherein a baffle plate is provided inside the deacidification chamber, wherein an input pipe is provided on the shell and the input pipe communicates with the deacidification chamber, wherein a separator is connected to one end of the shell, wherein a plurality of output pipes are provided on the separator, wherein the shell comprises an outer shell and an inner shell, wherein a sandwich layer is provided between the outer shell and the inner shell, and wherein a heating assembly is provided in the sandwich layer.

[0006] The present invention is further configured such that: the input pipe includes a feed pipe and an air inlet pipe, the feed pipe is disposed at one end of the deacidification furnace, the air inlet pipe has multiple sets, each set includes two air inlet pipes, each set of air inlet pipes is disposed opposite to the upper and lower ends of the deacidification furnace, there is a 10-30cm interval between adjacent sets of air inlet pipes, each air inlet pipe is provided with a pneumatic regulating valve, the end of the air inlet pipe away from the pneumatic regulating valve is connected to a steam jet heat pump, the steam jet heat pump has multiple nozzles, and the air inlet pipe is connected to each nozzle in a one-to-one correspondence.

[0007] The invention is further configured such that: the baffles are disposed on the inner wall of the inner shell, and the baffles are in multiple sets, each set including two baffles, the baffles in each set being disposed opposite each other at the top and bottom of the inner wall, the interval between the two baffles in each set forming an airflow port, the width of the airflow port being consistent with the inner diameter of the inner shell, the height of the airflow port being 5-10cm, and two adjacent sets of baffles dividing the deacidification chamber into multiple mixing sections, the multiple mixing sections being connected through the airflow port.

[0008] The present invention is further configured such that: each set of the baffles is arranged parallel to each other at the top and bottom of the inner wall, and the two baffles are staggered to form an airflow channel, and the airflow port or airflow channel is used for the flow of fumed silica.

[0009] The present invention is further configured such that: the baffle is one of NS141 high-temperature alloy steel and GH180 high-temperature alloy steel, and the inner wall of the baffle and the inner shell are coated with a corrosion-resistant coating.

[0010] The present invention is further configured such that: an insulation layer is provided on the inner wall of the outer shell; the heating component is an electric heating wire used to heat the inner shell; the outer shell is provided with a first temperature detection port and a first pressure detection port; and the separator is provided with a second temperature detection port and a second pressure detection port.

[0011] The present invention is further configured such that: a first temperature sensor is sealed inside the first temperature detection port, a first pressure sensor is sealed inside the first pressure detection port, a second temperature sensor is sealed inside the second temperature detection port, a second pressure sensor is sealed inside the second pressure detection port, and a sealing flange is provided on the housing, and the housing is sealed to the separator through the sealing flange.

[0012] The present invention is further configured such that: the output pipe includes an air outlet pipe, a material outlet pipe and a slag outlet pipe, the air outlet pipe is located at the top of the separator, the slag outlet pipe is located at the bottom of the separator, and the material outlet pipe is located at the lower part of the separator.

[0013] The present invention is further configured as follows: a method for deacidification of fumed silica using a fumed silica process, comprising the following steps:

[0014] Step 1: After the fumed silica particles are agglomerated into large particles in the agglomerator, the fumed silica particles are fed into the deacidification chamber through the feed pipe by the cyclone separator.

[0015] Step 2: The fumed silica first enters the first mixing section separated by the first set of baffles. The first set of air inlet pipes located in the first mixing section sprays high-temperature water vapor from above and below to mix with the fumed silica.

[0016] Step 3: After mixing high-temperature water vapor with fumed silica, the acidic substances on the fumed silica are desorbed by the high-temperature water vapor.

[0017] Step 4: The air inlet pipes of each group operate alternately and in a staggered manner. The fumed silica moves from the first mixing section near the feed pipe to the separator through each air outlet in sequence. During this process, it passes through 3-5 mixing sections in the deacidification chamber. Each mixing section corresponds to a set of air inlet pipes.

[0018] Step 5: After the fumed silica, which is fully mixed with high-temperature water vapor, enters the separator, it undergoes gas-solid separation. The gas is discharged from the separator through the gas outlet pipe for further processing, the finished fumed silica is discharged and stored through the discharge pipe, and other substances are discharged through the slag outlet pipe.

[0019] In summary, the present invention has the following beneficial effects: multiple mixing sections cooperate to provide multiple sets of air inlet pipes with opposing impacts to the mixing section. The high-temperature water vapor ejected through the impact force disperses the fumed silica entering the mixing section, thereby achieving full mixing of the high-temperature water vapor and the fumed silica. The heating component is an inner shell heating and an outer shell heat preservation, so that the temperature of the deacidification chamber can be continuously maintained as required by the deacidification process. The fumed silica passes through multiple mixing sections in sequence for impact mixing, so that it is fully mixed, has a good deacidification effect, and improves the final quality of the fumed silica. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of another embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the deacidification method of the present invention.

[0023] In the diagram: 1. Deacidification furnace; 2. Deacidification chamber; 21. Mixing section; 3. Shell; 4. Separator; 5. Inlet pipe; 6. Baffle plate; 7. Feed pipe; 8. First temperature detection port; 9. First pressure detection port; 10. Outlet pipe; 11. Second temperature detection port; 12. Second pressure detection port; 13. Discharge pipe; 14. Slag discharge pipe. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1As shown, the present invention discloses a gas-phase silica deacidification device, comprising an aggregator, a cyclone separator 4, and a deacidification furnace 1. The cyclone separator 4 conveys the gas-phase silica from the aggregator to the deacidification furnace 1. The deacidification furnace 1 includes a shell 3, and the sealed internal space of the shell 3 forms a deacidification chamber 2. A baffle 6 is provided in the deacidification chamber 2. An input pipe communicating with the deacidification chamber 2 is provided on the shell 3. The input pipe includes a feed pipe 7 for feeding gas-phase silica and multiple sets of air inlets 5 for high-temperature steam. The feed pipe 7 is located within the shell. One end of the housing 3 is connected to the cyclone separator 4. A separator 4 is provided at one end of the housing 3 away from the feed pipe 7. The separator 4 is connected to the housing 3 through a sealing flange. The housing 3 consists of an outer shell and an inner shell. A heating component is provided in the interlayer between the outer shell and the inner shell. The heating component is an electric heating component. The heating component is used to heat the inner shell. An insulation layer is provided on the wall of the outer shell facing the inner shell. The heating component can provide high temperature for the deacidification chamber 2 to carry out the deacidification process, ensuring that the internal temperature of the deacidification chamber 2 can carry out high-quality deacidification work.

[0026] like Figure 1 As shown, the intake pipe 5 includes 3-5 groups, each group including two intake pipes 5. The two intake pipes 5 in each group are respectively set at the top and bottom of the housing 3, and are arranged opposite each other. After the intake pipe 5 passes through the housing 3 and extends into the deacidification chamber 2, the openings of the intake pipe 5 are also opposite. Each intake pipe 5 is equipped with a pneumatic regulating valve. When the steam jet heat pump delivers high-temperature water vapor to the intake pipe 5, it will first accumulate in the intake pipe 5 and increase the pressure. When the pressure reaches the corresponding pressure value, the high-temperature water vapor will open the pneumatic regulating valve and then rush into the deacidification chamber 2. The two opposite intake pipes 5 simultaneously spray out high-temperature water vapor. The opposing high-temperature water vapor will disperse the fumed silica located here, so that the high-temperature water vapor and fumed silica are fully mixed. The baffle 6 is set in the deacidification chamber 2. The baffle 6 is used to restrict the flow of fumed silica. Specifically, the baffle 6 The baffles 6 are installed on the inner wall of the inner shell. There are 2-4 sets of baffles 6, each set including two baffles 6. The two baffles 6 are arranged opposite each other at the top and bottom of the inner wall. After the two baffles 6 are installed, there is a gap in the middle, which is the air outlet for the gas phase silica mixed with high temperature water vapor to flow through. Since the baffles 6 are installed vertically, the width of the air outlet is consistent with the inner diameter of the inner shell. The height of the air outlet is set to 5-10cm. The multiple sets of baffles 6 are arranged at intervals in the deacidification chamber 2, dividing the deacidification chamber 2 into 3-5 mixing sections 21. Each mixing section 21 is provided with a set of air inlet pipes 5 on the shell 3. Specifically, a set of air inlet pipes 5 is used to provide high temperature water vapor to a mixing section 21. The baffles 6, the inner shell and the interior of the separator 4 are all made of high temperature and corrosion resistant GH180 high temperature alloy steel.

[0027] like Figure 2As shown, in another embodiment of the present invention, the baffle plate 6 has 2-4 groups, each group including two baffle plates 6. The two baffle plates 6 in each group are arranged parallel to each other at the top and bottom of the inner wall. Specifically, the upper and lower positions of the two baffle plates 6 are staggered, and the staggered baffle plates 6 form an airflow channel. This airflow channel increases the movement path of the gas phase silica and improves the mixing effect.

[0028] like Figure 1 As shown, the housing 3 is provided with a first temperature detection port 8 and a first pressure detection port 9, and the separator 4 is provided with a second temperature detection port 11 and a second pressure detection port 12. A first temperature sensor is sealed inside the first temperature detection port 8, a first pressure sensor is sealed inside the first pressure detection port 9, a second temperature sensor is sealed inside the second temperature detection port 11, and a second pressure sensor is sealed inside the second pressure detection port 12. The output pipe includes an exhaust pipe 10, a discharge pipe 13, and a slag discharge pipe 14. The exhaust pipe 10 is located at the top of the separator 4, the slag discharge pipe 14 is located at the bottom of the separator 4, and the discharge pipe 13 is located at the lower part of the separator 4. The temperature sensor is used to detect the real-time temperature in the deacidification chamber 2 and the separator 4, and the pressure sensor is used to detect the real-time pressure in the deacidification chamber 2 and the separator 4. The exhaust pipe is used to discharge gas after the separator 4 performs gas-solid separation. The fumed silica product is discharged and stored through the discharge pipe 13, and other substances are discharged through the slag discharge pipe 14.

[0029] like Figure 1 , Figure 3 As shown, a method for deacidifying fumed silica using a fumed silica process, based on the aforementioned deacidification furnace 1, is implemented through the following steps: Step 1: After the fumed silica particles are agglomerated into larger particles in the agglomerator, the fumed silica is fed into the deacidification chamber 2 through the feed pipe 7 by the cyclone separator 4; Step 2: The fumed silica first enters the first mixing section 21, which is separated by the first set of baffles 6. The first set of air inlet pipes 5, located in the first mixing section 21, simultaneously sprays high-temperature water vapor from above and below to mix with the fumed silica; Step 3: After the high-temperature water vapor mixes with the fumed silica, the high-temperature water vapor is used to desorb the gas. Acidic substances on fumed silica; Step 4: Each group of air inlet pipes 5 operates alternately and intermittently. Fumed silica moves from the first mixing section 21 near the feed pipe 7 through each air outlet toward the separator 4, passing through 3-5 mixing sections 21 in the deacidification chamber 2. Each mixing section 21 corresponds to a group of air inlet pipes 5; Step 5: After the fumed silica, which is fully mixed with high-temperature water vapor, enters the separator 4, it undergoes gas-solid separation in the separator 4. The gas is discharged from the separator 4 through the air outlet pipe 10 for subsequent processing. The finished fumed silica is discharged and stored through the discharge pipe 13, and other substances are discharged through the slag discharge pipe 14.

[0030] Multiple mixing sections 21 cooperate to provide multiple sets of air inlet pipes 5 with opposing impacts to the mixing sections 21. The high-temperature water vapor ejected through the impact force disperses the fumed silica entering the mixing section 21, thereby achieving mixing of the high-temperature water vapor and the fumed silica. The fumed silica passes through multiple mixing sections 21 in sequence, and is subjected to the impact of high-temperature water vapor once in each mixing section 21, so that the fumed silica and high-temperature water vapor are fully mixed, which greatly improves the deacidification efficiency and deacidification effect. Only one deacidification furnace 1 and one separator 4 are needed, which reduces the floor space and production cost. The heating component is an inner shell heating and an outer shell insulation, so that the temperature of the deacidification chamber 2 can be continuously maintained as required by the deacidification process. The fumed silica is subjected to the impact mixing of multiple mixing sections 21 in sequence, which improves the quality of the fumed silica.

[0031] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A gas-phase silica deacidification device, comprising an aggregator, a cyclone separator (4), and a deacidification furnace (1), wherein the cyclone separator (4) conveys the gas-phase silica in the aggregator to the deacidification furnace (1), characterized in that: The deacidification furnace (1) includes a shell (3), a deacidification chamber (2) is provided inside the shell (3), a baffle plate (6) is provided inside the deacidification chamber (2), an input pipe is provided on the shell (3) and the input pipe communicates with the deacidification chamber (2), a separator (4) is connected to one end of the shell (3), and a plurality of output pipes are provided on the separator (4). The shell (3) includes an outer shell and an inner shell, and a sandwich layer is provided between the outer shell and the inner shell. A heating component is provided in the sandwich layer.

2. The gas-phase silica deacidification apparatus according to claim 1, characterized in that: The input pipe includes a feed pipe (7) and an air inlet pipe (5). The feed pipe (7) is located at one end of the deacidification furnace (1). The air inlet pipe (5) has multiple sets, each set including two air inlet pipes (5). Each set of air inlet pipes (5) is arranged opposite to each other at the upper and lower ends of the deacidification furnace (1). There is a 10-30cm interval between two adjacent sets of air inlet pipes (5). Each air inlet pipe (5) is equipped with a pneumatic regulating valve. The end of the air inlet pipe (5) away from the pneumatic regulating valve is connected to a steam jet heat pump. The steam jet heat pump has multiple nozzles. The air inlet pipe (5) is connected to each nozzle in a one-to-one correspondence.

3. The gas-phase silica deacidification apparatus according to claim 1, characterized in that: The baffle (6) is disposed on the inner wall of the inner shell. There are multiple sets of baffles (6), each set including two baffles (6). Each set of baffles (6) is disposed opposite to each other at the top and bottom of the inner wall. The gap between the two baffles (6) disposed opposite to each other in each set forms an airflow port. The width of the airflow port is consistent with the inner diameter of the inner shell. The height of the airflow port is 5-10cm. Two adjacent sets of baffles (6) divide the deacidification chamber (2) into multiple mixing sections (21). The multiple mixing sections (21) are connected to each other through the airflow port.

4. The gas-phase silica deacidification apparatus according to claim 3, characterized in that: Each set of the baffles (6) is arranged parallel to each other at the top and bottom of the inner wall, and the two baffles (6) are staggered to form an airflow channel, through which the airflow port or airflow channel is used for the flow of fumed silica.

5. The gas-phase silica deacidification apparatus according to claim 3, characterized in that: The baffle plate (6) is one of NS141 high-temperature alloy steel or GH180 high-temperature alloy steel, and the baffle plate (6) and the inner wall of the inner shell are coated with a corrosion-resistant coating.

6. The gas-phase silica deacidification apparatus according to claim 1, characterized in that: The inner wall of the outer shell is provided with a heat insulation layer, the heating component is an electric heating wire, the electric heating wire is used to heat the inner shell, the shell (3) is provided with a first temperature detection port (8) and a first pressure detection port (9), and the separator (4) is provided with a second temperature detection port (11) and a second pressure detection port (12).

7. The gas-phase silica deacidification apparatus according to claim 6, characterized in that: A first temperature sensor is sealed inside the first temperature detection port (8), a first pressure sensor is sealed inside the first pressure detection port (9), a second temperature sensor is sealed inside the second temperature detection port (11), a second pressure sensor is sealed inside the second pressure detection port (12), a sealing flange is provided on the housing (3), and the housing (3) is sealed to the separator (4) through the sealing flange.

8. The gas-phase silica deacidification apparatus according to claim 1, characterized in that: The output pipe includes an air outlet pipe (10), a material outlet pipe (13), and a slag outlet pipe (14). The air outlet pipe (10) is located at the top of the separator (4), the slag outlet pipe (14) is located at the bottom of the separator (4), and the material outlet pipe (13) is located at the lower part of the separator (4).

9. A method for deacidification of fumed silica using a fumed silica process, based on the fumed silica deacidification apparatus according to any one of claims 1-8, characterized in that: It also includes the following steps Step 1: After the fumed silica is agglomerated from small particles into large particles in the agglomerator, the fumed silica is fed into the deacidification chamber (2) through the feed pipe (7) by the cyclone separator (4). Step 2: The fumed silica first enters the first mixing section (21) separated by the first set of baffles (6). The first set of air inlet pipes (5) located in the first mixing section (21) sprays high-temperature water vapor from above and below to mix with the fumed silica. Step 3: After mixing high-temperature water vapor with fumed silica, the acidic substances on the fumed silica are desorbed by the high-temperature water vapor. Step 4: Each group of air inlet pipes (5) operates alternately and intermittently. The fumed silica moves from the first mixing section (21) near the feed pipe (7) to the separator (4) through each air outlet in sequence. During this process, it passes through 3-5 mixing sections (21) in the deacidification chamber (2). Each mixing section (21) corresponds to a group of air inlet pipes (5). Step 5: After the fumed silica, which is fully mixed with high-temperature steam, enters the separator (4), it undergoes gas-solid separation in the separator (4). The gas is discharged from the separator (4) through the gas outlet pipe (10) for further processing. The finished fumed silica is discharged and stored through the discharge pipe (13), while other substances are discharged through the slag outlet pipe (14).

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