Continuous bleaching device for titanium dioxide by sulfuric acid method

Abstract

The application relates to the technical field of titanium white processing, in particular to a sulfuric acid method titanium white continuous bleaching production device, which comprises a concentration adjusting module, a component adjusting module, a bleaching container, a sizing container and a pre-bleaching buffer container. The pre-bleaching buffer container is connected with a pulp source; the pre-bleaching buffer container is connected with the sizing container and used for receiving and storing the pulp in the pre-bleaching buffer container; the concentration adjusting module is arranged and used for adjusting the pulp concentration in the sizing container; and the component adjusting module is used for adding at least one component into the bleaching container. In the application, the concentration adjusting module and the component adjusting module are arranged, the pulp concentration can be more accurately adjusted, the interference of human factors is reduced, the stability of product quality is improved, continuous automatic production is realized, manual operation links are reduced, the labor intensity of operators is greatly reduced, the labor cost is reduced, meanwhile, the production safety is improved.

Description

Technical Field

[0001] This application relates to the field of titanium dioxide processing technology, and more specifically, to a continuous bleaching production apparatus for titanium dioxide produced using the sulfuric acid process. Background Technology

[0002] The sulfuric acid process for titanium dioxide production is one of the most widely used production methods in the titanium dioxide industry today. The bleaching process, as a key step, directly affects the whiteness and quality indicators of the final product. Traditional bleaching processes typically employ an intermittent operation mode, requiring manual intervention at multiple stages.

[0003] In existing technologies, the specific implementation process of the bleaching process is as follows: the titanium liquid that has completed hydrolysis in the reactor first enters the bleaching section. Operators need to take samples regularly and send them to the laboratory for concentration testing. Based on the test results, process engineers need to consult the process manual to calculate the dosage of reducing agents, stabilizers, and other chemical reagents. Subsequently, various reagents are added to the reaction system in batches, either manually or semi-automatically. The entire bleaching process requires maintaining specific temperature, pressure, and reaction time parameters, and the next process can only begin after the reaction is complete.

[0004] This batch processing mode involves a complete cycle of preparation, reaction, testing, and discharge, with equipment cleaning and operating condition adjustments required between each batch. Because the concentration of the titanium solution fluctuates depending on the source of raw materials and upstream processes, increased sampling frequency is often necessary to ensure process stability in practice. Manual sampling not only introduces time delays but also introduces errors during sample transfer and testing. These factors can cause deviations between the actual addition amount and the theoretical requirement, thus affecting the uniformity of product indicators. Utility Model Content

[0005] The purpose of this application is to provide a continuous bleaching production apparatus for titanium dioxide using the sulfuric acid process, which can improve production efficiency.

[0006] To achieve the above objectives, this utility model provides a continuous titanium dioxide bleaching production apparatus using the sulfuric acid process, comprising: A pre-bleaching buffer container equipped with a stirring blade is connected to a washing pulp source and is used to store the initial washing pulp after preliminary conditioning. A slurry preparation container equipped with a stirring blade is connected to the pre-bleaching buffer container, and the slurry preparation container is used to receive and store the slurry in the pre-bleaching buffer container; A bleaching container equipped with a stirring blade is connected to the slurry preparation container and is used to receive and store the slurry in the slurry preparation container. A concentration adjustment module, configured to adjust the concentration of the slurry in the slurry preparation container; A component adjustment module is used to add at least one component to the bleaching container to bleach the slurry in the bleaching container.

[0007] In an optional implementation, a first temperature control module is further included, which is used to acquire the temperature of the slurry at the bleaching container and adjust the temperature of the slurry in the bleaching container to a first preset temperature based on the acquired temperature.

[0008] In an optional embodiment, the slurry preparation container and the bleaching container are connected by a first pipe, the inlet of the first pipe being connected to the overflow port of the slurry preparation container, and the outlet of the first pipe being located at the bottom of the bleaching container.

[0009] In an optional embodiment, it further includes a heat-insulating homogenization container and a second temperature control module, wherein the heat-insulating homogenization container is connected to the bleaching container and is used to receive and store the bleached slurry in the bleaching container; The heat-insulating homogenizing container is equipped with a stirring blade; The second temperature control module is used to acquire the slurry temperature at the heat-insulating homogenization container and adjust the slurry temperature in the heat-insulating homogenization container to a second preset temperature based on the acquired temperature.

[0010] In an optional embodiment, the bleaching container and the heat-insulating homogenizing container are connected by a second pipe, the inlet of which is connected to the overflow port of the bleaching container, and the outlet of which is located at the bottom of the heat-insulating homogenizing container.

[0011] In an optional embodiment, a post-bleaching buffer container is also included, which is connected to the heat-insulating homogenizing container and is used to receive and store the slurry in the heat-insulating homogenizing container. The bleached buffer container is equipped with a stirring blade.

[0012] In an optional embodiment, the pre-bleaching buffer container and the slurry preparation container are connected by a third pipe, the inlet of which is connected to the bottom of the pre-bleaching buffer container, and the outlet of which is located at the bottom of the slurry preparation container.

[0013] In an optional embodiment, the concentration adjustment module is disposed on the third pipe, and the concentration adjustment module is configured to acquire the density and flow rate of the slurry in the third pipe, and adjust the concentration of the slurry discharged into the slurry preparation container through the third pipe based on the acquired density and flow rate.

[0014] In an optional embodiment, a fourth pipe is provided at the overflow port of the heat-insulating homogenizing container, and the outlet of the fourth pipe extends to the bottom of the bleaching buffer container.

[0015] In an optional embodiment, the component adjustment module includes a sulfuric acid component source, a trivalent titanium component source, and an R seed crystal component source.

[0016] In this application, by setting up a concentration adjustment module and a component adjustment module, the slurry concentration and added components can be adjusted more precisely, reducing interference from human factors, improving the stability of product quality, realizing continuous automated production, reducing manual operation links, greatly reducing the labor intensity of operators, reducing labor costs, and also improving production safety.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of one embodiment of the sulfuric acid process titanium dioxide continuous bleaching production apparatus provided in this application.

[0020] icon: 110 - Pre-bleaching buffer container; 120 - Slurry preparation container; 130 - Bleaching container; 140 - Insulated homogenization container; 150 - Post-bleaching buffer container; 200 - Concentration adjustment module; 210 - First regulating valve; 220 - First flow meter; 230 - Second flow meter; 235 - Sixth flow meter; 240 - Kernel density meter; 300 - Component preparation module; 310 - Sulfuric acid component source; 312 - Second regulating valve; 314 - Third flow meter; 320 - Trivalent titanium component source; 322 - Third regulating valve; 324 - Fourth flow meter; 330-R Seed Component Source; 332-Fourth Control Valve; 334-Fifth Flow Meter; 400 - First temperature control module; 410 - Fifth regulating valve; 420 - First thermometer; 430 - First steam source; 500 - Second temperature control module; 510 - Sixth regulating valve; 520 - Second thermometer; 530 - Second steam source; 600 - First pipe; 610 - Second pipe; 620 - Third pipe; 630 - Fourth pipe; 700 - Agitator blade; 710 - Primary washing slurry source; 720 - Secondary washing recycled water source; 730 - Conveying pump. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] like Figure 1 As shown, embodiments of this application provide a continuous titanium dioxide bleaching production apparatus using the sulfuric acid process, including a pre-bleaching buffer container 110, a slurry preparation container 120, a bleaching container 130, a concentration adjustment module 200, and a component adjustment module 300.

[0025] The pre-bleaching buffer container 110 is connected to a washing pulp source 710 and is used to store the pre-conditioned washing pulp. Exemplarily, the washing pulp is pre-conditioned before entering the pre-bleaching buffer container 110, for example by adding water to reduce the concentration of the washing pulp for easier transport.

[0026] The pre-bleaching buffer container 110 is equipped with an agitator blade 700, which is used to agitate the washed pulp in the pre-bleaching buffer container 110.

[0027] The slurry preparation container 120 is connected to the pre-bleaching buffer container 110, and the slurry preparation container 120 is used to receive and store the slurry in the pre-bleaching buffer container 110. Exemplarily, a transfer pump 730 is provided between the pre-bleaching buffer container 110 and the slurry preparation container 120, and the transfer pump 730 is used to transfer a washed slurry in the pre-bleaching buffer container 110 to the slurry preparation container 120.

[0028] The slurry preparation container 120 is equipped with a stirring blade 700, which is used to stir the slurry in the slurry preparation container 120.

[0029] The bleaching container 130 is connected to the mixing container 120 and is used to receive and store the slurry in the mixing container 120.

[0030] The bleaching container 130 is provided with a stirring blade 700, which is used to stir the slurry in the bleaching container 130.

[0031] The concentration adjustment module 200 is configured to adjust the slurry concentration in the slurry preparation container 120.

[0032] The component adjustment module 300 is used to add at least one component to the bleaching container 130 to bleach the slurry in the bleaching container 130.

[0033] like Figure 1 As indicated by the arrows, a first-wash slurry is continuously fed into the pre-bleaching buffer container 110. The delivery pump 730 continuously delivers the first-wash slurry from the pre-bleaching buffer container 110 to the mixing container 120. Simultaneously, the concentration adjustment module 200 adjusts the slurry concentration in the mixing container 120 to meet the requirements of subsequent processing steps. The slurry in the mixing container 120 is continuously delivered to the bleaching container 130. The component adjustment module 300 adds at least one component to the bleaching container 130 to bleach the slurry in the bleaching container 130. The bleaching container 130 continuously delivers the bleached slurry outwards.

[0034] Traditional bleaching processes employ an intermittent operation mode, involving complete preparation, reaction, testing, and discharge cycles. Equipment cleaning and operational adjustments are also required between batches, consuming significant time. This device, however, connects a pre-bleaching buffer container 110, a slurry preparation container 120, and a bleaching container 130 in sequence. Combined with equipment such as a delivery pump 730, this allows for a continuous flow of washed slurry into the pre-bleaching buffer container 110, followed by sequential delivery to the slurry preparation container 120 and the bleaching container 130. This achieves continuous production, reduces waiting time between batches, and significantly improves production efficiency.

[0035] Continuous production helps stabilize the rhythm of the entire production process, avoiding the time waste and production instability caused by frequent equipment starts and stops in intermittent production. This makes the production process smoother, allowing more washing pulp to be processed per unit time, thereby increasing overall output.

[0036] In traditional processes, samples are manually taken and sent to a laboratory for concentration testing. Process engineers then consult manuals to calculate the required chemical reagent dosage, followed by manual or semi-automatic batch addition of the reagents. Manual operation not only introduces time delays but also introduces errors during sample transfer and testing, leading to discrepancies between the actual dosage and theoretical requirements, thus affecting the uniformity of product indicators. This device, with its concentration adjustment module 200 and component adjustment module 300, can more precisely adjust the slurry concentration and added components, reducing human interference and improving product quality stability.

[0037] Because the concentration of titanium solution fluctuates with the source of raw materials and upstream processes, traditional processes require increased sampling frequency to ensure process stability, but it is still difficult to completely avoid the impact of concentration fluctuations on product quality. This device's continuous production mode can monitor and adjust the slurry concentration and composition in real time, adapting promptly to changes in titanium solution concentration and ensuring that the slurry quality at each stage is within a suitable range, thereby improving the whiteness and uniformity of the final product's quality indicators.

[0038] Manual sampling, sample handling, calculation of dosage, and batch addition of reagents are not only tedious but also labor-intensive. This device achieves continuous automated production, reduces manual operation steps, greatly alleviates the labor intensity of operators, lowers labor costs, and also improves production safety.

[0039] To accelerate the bleaching speed of the slurry in bleaching container 130, such as Figure 1 As shown, in one embodiment, the sulfuric acid process titanium dioxide continuous bleaching production apparatus further includes a first temperature control module 400, which is used to acquire the slurry temperature at the bleaching container 130 and adjust the slurry temperature in the bleaching container 130 to a first preset temperature based on the acquired temperature.

[0040] For example, the first temperature control module 400 includes a first processor, a first thermometer 420, and a heater. The first processor is electrically connected to the first thermometer 420 and the heater. The first thermometer 420 is used to obtain the temperature of the slurry in the bleaching container 130 and convert it into an electrical signal to be sent to the first processor. The heater is used to heat the slurry in the bleaching container 130. The first processor can control the start and stop of the heater. During use, the first thermometer 420 obtains the temperature of the slurry in the bleaching container 130. If the slurry temperature is lower than a first preset temperature, the first processor starts the heater to heat the slurry in the bleaching container 130.

[0041] The first preset temperature can be set according to the actual needs of the project. The first preset temperature can be a single-point discrete value or a range value. When the first preset temperature is a single-point discrete value, the first preset temperature is, for example, 40℃, 42℃, 45℃ or 50℃, etc. When the first preset temperature is a range value, the first preset temperature is, for example, 40℃-42℃, 42℃-45℃ or 45℃-50℃, etc.

[0042] The first thermometer 420 is, for example, an infrared temperature sensor or a thermistor temperature sensor.

[0043] In this embodiment, for example, the heater includes a steam pipe and a first steam source 430. A fifth regulating valve 410 is provided on the steam pipe and is electrically connected to a first processor. The steam pipe is disposed in the bleaching container 130, and the first steam source 430 is used to provide steam and is connected to the steam pipe. The first processor controls the fifth regulating valve 410 to open, so that steam from the first steam source 430 enters the steam pipe to heat the slurry in the bleaching container 130. The first steam source 430 is, for example, steam generated in a steam boiler or other production process. However, in other embodiments, the heater includes, but is not limited to, a resistance heater, an electromagnetic heater, an infrared heater, a fuel heater, etc.

[0044] To achieve connection between the slurry preparation container 120 and the bleaching container 130, such as Figure 1 As shown, in one embodiment, the mixing container 120 and the bleaching container 130 are connected by a first pipe 600. The inlet of the first pipe 600 is connected to the overflow port of the mixing container 120. When the pre-bleaching buffer container 110 continuously supplies slurry to the mixing container 120, the slurry in the mixing container 120 enters the first pipe 600 from the overflow port, so that the mixing container 120 can continuously supply slurry to the bleaching container 130.

[0045] The outlet of the first pipe 600 is located at the bottom of the bleaching container 130, which prevents the slurry discharged from the first pipe 600 from being discharged from the bleaching container 130 again immediately, increases the stirring time of the slurry in the bleaching container 130, and improves the bleaching effect.

[0046] To ensure a more stable output quality of the bleaching container 130, such as Figure 1 As shown, in one embodiment, the sulfuric acid process titanium dioxide continuous bleaching production apparatus further includes a heat-insulating homogenization container 140 and a second temperature control module 500.

[0047] The heat-insulating homogenizing container 140 is connected to the bleaching container 130 and is used to receive and store the bleached slurry in the bleaching container 130.

[0048] The heat-insulating homogenizing container 140 is equipped with a stirring blade 700, which is used to stir the slurry in the heat-insulating homogenizing container 140.

[0049] The second temperature control module 500 is used to acquire the slurry temperature at the heat-insulating homogenization container 140 and adjust the slurry temperature in the heat-insulating homogenization container 140 to a second preset temperature based on the acquired temperature.

[0050] For example, the second temperature control module 500 includes a second processor, a second thermometer 520 and a heater. The second processor is electrically connected to the second thermometer 520 and the heater. The second thermometer 520 is used to obtain the temperature of the slurry in the heat-insulating homogenization container 140 and convert it into an electrical signal and send it to the second processor. The heater is used to heat the slurry in the heat-insulating homogenization container 140. The second processor can control the start and stop of the heater.

[0051] During use, the slurry in the bleaching container 130 is transported to the heat-insulating homogenizing container 140 to prevent the slurry from being over-bleached in the bleaching container 130. The stirring blades 700 on the heat-insulating homogenizing container 140 stir the slurry in the heat-insulating homogenizing container 140, thereby improving the homogenization of the slurry. At the same time, the second temperature control module 500 obtains the temperature of the slurry in the heat-insulating homogenizing container 140. If the slurry temperature is lower than the second preset temperature, the second processor starts the heater to heat the slurry in the heat-insulating homogenizing container 140.

[0052] The second preset temperature can be set according to the actual needs of the project. The second preset temperature can be a single-point discrete value or a range value. When the second preset temperature is a single-point discrete value, the second preset temperature is, for example, 40℃, 42℃, 45℃ or 50℃, etc. When the second preset temperature is a range value, the second preset temperature is, for example, 40℃-42℃, 42℃-45℃ or 45℃-50℃, etc.

[0053] The second thermometer 520 is, for example, an infrared temperature sensor or a nuclear thermometer.

[0054] like Figure 1 As shown, exemplarily, in this embodiment, the heater includes a steam pipe and a second steam source 530. A sixth regulating valve 510 is provided on the steam pipe, and the sixth regulating valve 510 is electrically connected to a second processor. The steam pipe is disposed in the heat-insulating homogenization container 140, and the second steam source 530 is used to provide steam and is connected to the steam pipe. The second processor controls the sixth regulating valve 510 to open, so that steam from the second steam source 530 enters the steam pipe, thereby heating the slurry in the heat-insulating homogenization container 140. However, in other embodiments, the heater includes, but is not limited to, a resistance heater, an electromagnetic heater, an infrared heater, a fuel heater, etc.

[0055] like Figure 1As shown, in one embodiment, the bleaching container 130 and the heat-insulating homogenizing container 140 are connected by a second pipe 610.

[0056] The inlet of the second pipe 610 is connected to the overflow port of the bleaching container 130, enabling the bleaching container 130 to continuously supply slurry to the heat-insulating homogenizing container 140.

[0057] The outlet of the second pipe 610 is located at the bottom of the heat-insulating homogenizing container 140, which prevents the slurry discharged from the second pipe 610 from being discharged from the heat-insulating homogenizing container 140 again immediately. This increases the stirring time of the slurry in the heat-insulating homogenizing container 140, making the slurry more uniform and preventing sedimentation.

[0058] like Figure 1 As shown, in one embodiment, the sulfuric acid process titanium dioxide continuous bleaching production apparatus further includes a post-bleaching buffer container 150, which is connected to an insulated homogenizing container 140 and is used to receive and store the slurry in the insulated homogenizing container 140 for use in the subsequent second washing slurry process of the production line.

[0059] The slurry in the heat-insulating homogenizing container 140 is continuously supplied to the bleaching buffer container 150, so that the bleaching buffer container 150 can continuously provide a steady stream of slurry to the subsequent production line processes, ensuring production continuity and improving production efficiency.

[0060] The bleaching buffer container 150 is equipped with a stirring blade 700, which is used to stir the slurry in the bleaching buffer container 150 to prevent sedimentation, etc.

[0061] like Figure 1 As shown, in one embodiment, the pre-bleaching buffer container 110 and the slurry preparation container 120 are connected by a third pipe 620. The inlet of the third pipe 620 is connected to the bottom of the pre-bleaching buffer container 110 to prevent slurry sedimentation and accumulation at the bottom of the pre-bleaching buffer container 110.

[0062] For example, the delivery pump 730 is disposed in the third conduit 620.

[0063] When the first batch of slurry is initially introduced into the pre-bleaching buffer container 110, it has not been fully stirred and is prone to sedimentation at the bottom of the pre-bleaching buffer container 110. By setting the inlet of the third pipe 620 at the bottom of the pre-bleaching buffer container 110, it is easier for the third pipe 620 and the delivery pump 730 to extract the slurry sedimented at the bottom of the pre-bleaching buffer container 110, thereby reducing the amount of slurry sedimented at the bottom of the pre-bleaching buffer container 110 to a certain extent.

[0064] The outlet of the third pipe 620 is located at the bottom of the slurry mixing container 120. The slurry in the slurry mixing container 120 is discharged through the overflow port, which increases the mixing time of the slurry and improves the mixing effect.

[0065] like Figure 1 As shown, in one embodiment, a concentration adjustment module 200 is disposed on a third pipe 620. The concentration adjustment module 200 is configured to acquire the density and flow rate of the slurry in the third pipe 620, and adjust the concentration of the slurry discharged into the slurry preparation container 120 through the third pipe 620 based on the acquired density and flow rate.

[0066] For example, the concentration adjustment module 200 includes a third processor, a water pipe, a secondary wash recovery water source 720, a first regulating valve 210, a first flow meter 220, a second flow meter 230, and a nuclear density meter 240. One end of the water pipe is connected to the secondary wash recovery water source 720, and the other end of the water pipe is installed on the third pipe 620. The secondary wash recovery water source 720 is used to flow water into the water pipe. The water pipe is equipped with a first flow meter 220 for obtaining the flow rate of the secondary wash recovery water source 720 and a first regulating valve 210 for controlling the opening and closing of the water pipe. The first regulating valve 210 is electrically connected to the third processor, and the third processor controls the opening and closing of the first regulating valve 210.

[0067] The second flow meter 230 and the nuclear density meter 240 are installed on the third pipe 620 and electrically connected to the third processor. The second flow meter 230 is used to obtain the flow rate of the slurry in the third pipe 620 and send it to the third processor. The nuclear density meter 240 is used to obtain the density of the slurry in the third pipe 620 and send it to the third processor.

[0068] The third processor controls the opening and closing of the first regulating valve 210 based on the flow rate and density of the slurry in the third pipe 620. For example, if the density of the slurry is detected to be high, the third processor controls the first regulating valve 210 to open more fully, allowing water from the secondary washing and recovery water source 720 to flow into the third pipe 620. Alternatively, if the density of the slurry is detected to be low, the third processor controls the first regulating valve 210 to close less fully.

[0069] like Figure 1 As shown, in one embodiment, a fourth pipe 630 is provided at the overflow port of the heat-insulating homogenizing container 140, and the outlet of the fourth pipe 630 extends to the bottom of the bleaching buffer container 150.

[0070] like Figure 1 As shown, in one embodiment, the component adjustment module 300 includes a fourth processor, a sulfuric acid component source 310, a trivalent titanium component source 320, and an R seed crystal component source 330.

[0071] For example, a sulfuric acid source 310 is connected to a bleaching container 130 via a pipe, which is equipped with a second regulating valve 312 and a third flow meter 314 electrically connected to a fourth processor. The sulfuric acid source 310 is used to supply sulfuric acid to the bleaching container 130.

[0072] For example, a trivalent titanium component source 320 is connected to a bleaching container 130 via a pipe, which is equipped with a third regulating valve 322 and a fourth flow meter 324 electrically connected to a fourth processor. The trivalent titanium component source 320 is used to supply trivalent titanium to the bleaching container 130.

[0073] For example, the R seed crystal component source 330 is connected to the bleaching container 130 via a pipe, which is equipped with a fourth regulating valve 332 and a fifth flow meter 334 electrically connected to a fourth processor. The R seed crystal component source 330 is used to supply R seeds to the bleaching container 130.

[0074] For example, a sixth flow meter 235 is provided in the first pipe 600. The sixth flow meter 235 is electrically connected to the fourth processor. The sixth flow meter 235 is used to obtain the flow rate of the slurry in the first pipe 600 and convert it into an electrical signal and send it to the fourth processor.

[0075] The fourth processor adjusts the opening degree of the second regulating valve 312, the third regulating valve 322, and the fourth regulating valve 332 according to the slurry flow rate in the first pipe 600 obtained by the sixth flow meter 235. For example, if the sixth flow meter 235 detects that the slurry flow rate in the first pipe 600 is small, assuming that the detected slurry flow rate in the first pipe 600 is 3L / s, the fourth processor controls the second regulating valve 312, the third regulating valve 322, and the fourth regulating valve 332 to reduce the opening degree, thereby reducing the supply of sulfuric acid, trivalent titanium, and R seed crystals to the bleaching container 130.

[0076] For example, if the sixth flow meter 235 detects that the slurry flow rate in the first pipe 600 is large, assuming that the detected slurry flow rate in the first pipe 600 is 8L / s, then the fourth processor controls the second regulating valve 312, the third regulating valve 322 and the fourth regulating valve 332 to increase the opening degree, so as to increase the supply of sulfuric acid, trivalent titanium and R seed crystals to the bleaching container 130.

[0077] For example, the first processor, the second processor, the third processor and the fourth processor can be integrated into one processor, or they can be separated into at least two processors.

[0078] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A continuous titanium dioxide bleaching production apparatus using the sulfuric acid process, characterized in that, include: A pre-bleaching buffer container (110) equipped with a stirring blade (700) is connected to a washing pulp source (710) and used to store the washing pulp after initial conditioning. A slurry preparation container (120) equipped with a stirring blade (700) is connected to the pre-bleaching buffer container (110), and the slurry preparation container (120) is used to receive and store the slurry in the pre-bleaching buffer container (110); A bleaching container (130) equipped with a stirring blade (700) is connected to the slurry preparation container (120) and is used to receive and store the slurry in the slurry preparation container (120); A concentration adjustment module (200) is configured to adjust the slurry concentration in the slurry preparation container (120); A component adjustment module (300) is used to add at least one component to the bleaching container (130) to bleach the slurry in the bleaching container (130).

2. The continuous titanium dioxide bleaching production apparatus according to claim 1, characterized in that, It also includes a first temperature control module (400), which is used to obtain the slurry temperature at the bleaching container (130) and adjust the slurry temperature in the bleaching container (130) to a first preset temperature based on the obtained temperature.

3. The continuous titanium dioxide bleaching production apparatus according to claim 1, characterized in that, The slurry preparation container (120) and the bleaching container (130) are connected by a first pipe (600), the inlet of the first pipe (600) is connected to the overflow port of the slurry preparation container (120), and the outlet of the first pipe (600) is located at the bottom of the bleaching container (130).

4. The continuous titanium dioxide bleaching production apparatus according to claim 1, characterized in that, It also includes an insulated homogenizing container (140) and a second temperature control module (500), wherein the insulated homogenizing container (140) is connected to the bleaching container (130) and is used to receive and store the bleached slurry in the bleaching container (130); The heat-insulating homogenizing container (140) is equipped with a stirring blade (700). The second temperature control module (500) is used to obtain the slurry temperature at the heat-insulating homogenizing container (140) and adjust the slurry temperature in the heat-insulating homogenizing container (140) to a second preset temperature based on the obtained temperature.

5. The continuous titanium dioxide bleaching production apparatus according to claim 4, characterized in that, The bleaching container (130) and the heat-insulating homogenizing container (140) are connected by a second pipe (610), the inlet of the second pipe (610) is connected to the overflow port of the bleaching container (130), and the outlet of the second pipe (610) is located at the bottom of the heat-insulating homogenizing container (140).

6. The continuous titanium dioxide bleaching production apparatus according to claim 4, characterized in that, It also includes a post-bleaching buffer container (150), which is connected to the heat-insulating homogenizing container (140) and is used to receive and store the slurry in the heat-insulating homogenizing container (140); The bleached buffer container (150) is equipped with a stirring blade (700).

7. The continuous titanium dioxide bleaching production apparatus according to claim 6, characterized in that, The pre-bleaching buffer container (110) and the slurry preparation container (120) are connected by a third pipe (620). The inlet of the third pipe (620) is connected to the bottom of the pre-bleaching buffer container (110), and the outlet of the third pipe (620) is located at the bottom of the slurry preparation container (120).

8. The continuous titanium dioxide bleaching production apparatus according to claim 7, characterized in that, The concentration adjustment module (200) is disposed on the third pipe (620). The concentration adjustment module (200) is configured to obtain the density and flow rate of the slurry in the third pipe (620) and adjust the concentration of the slurry discharged into the slurry preparation container (120) through the third pipe (620) based on the obtained density and flow rate.

9. The continuous titanium dioxide bleaching production apparatus according to claim 6, characterized in that, The insulated homogenizing container (140) is provided with a fourth pipe (630) at its overflow port, and the outlet of the fourth pipe (630) extends to the bottom of the bleached buffer container (150).

10. The continuous titanium dioxide bleaching production apparatus according to claim 1, characterized in that, The component adjustment module (300) includes a sulfuric acid component source (310), a trivalent titanium component source (320), and an R seed crystal component source (330).

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