Automatic joint control titanium tetrachloride vanadium removal system

Abstract

The automatic joint control titanium tetrachloride vanadium removal system comprises an oil storage tank, a pump A, a regulating valve A, a mass flow meter A, a titanium tetrachloride storage tank, a pump B, a regulating valve B, a mass flow meter B, a mixer, a pipeline A and a pipeline B, the other end of the pipeline A is connected with one end of the pipeline B and then is connected with the mixer; the other end of the pipeline B is connected with a titanium tetrachloride storage tank; the pipeline A is a vanadium removal oil supply pipeline and is sequentially provided with a pump A, a regulating valve A and a mass flow meter A in the fluid direction; the pipeline B is a titanium tetrachloride supply pipeline and is sequentially provided with a pump B, a regulating valve B and a mass flow meter B in the fluid direction. The device can realize automatic, accurate and stable regulation and control of the adding mass ratio of the vanadium removal oil to the titanium tetrachloride, and has important engineering application value and practical significance for improving the titanium sponge production efficiency, reducing the material consumption cost and guaranteeing the product quality stability.

Description

Technical Field

[0001] This invention relates to an automated, interconnected titanium tetrachloride vanadium removal system, belonging to the field of sponge titanium production technology. Background Technology

[0002] Titanium sponge, as a key strategic metallic material, occupies an indispensable position in high-tech fields such as aerospace, advanced chemicals, and biomedicine due to its excellent specific strength, corrosion resistance, and biocompatibility. In the industrial production process of titanium sponge, the mainstream process is the magnesothermic reduction method (Klauer process). This process uses high-purity titanium tetrachloride as the core raw material, and the purity of the raw material directly determines the performance and quality of the final titanium sponge product. However, the crude titanium tetrachloride prepared in the chlorination stage is generally accompanied by vanadium-based impurities, mainly vanadium oxychloride. These impurities have similar physicochemical properties to titanium tetrachloride. If not effectively removed, they will accumulate four times in the product matrix during the subsequent reduction process, significantly degrading the purity, plasticity, and mechanical properties of the titanium sponge. Therefore, deep vanadium removal from crude titanium tetrachloride is the core process in the refining of titanium sponge.

[0003] Currently, the industry widely adopts organic vanadium removal processes. The technical principle is as follows: vanadium-removing oil (such as mineral oil) is quantitatively added to a pre-distilled titanium tetrachloride system. Utilizing the reducing properties of the active components in the vanadium-removing oil, vanadium impurities are converted into solid vanadium compounds insoluble in titanium tetrachloride. The impurities are then removed through solid-liquid separation. The key to this process lies in precisely controlling the mass ratio of vanadium-removing oil to titanium tetrachloride. In industrial production, this ratio typically needs to be stably controlled at around 3-6 kg / t to ensure effective vanadium removal.

[0004] Traditional vanadium removal oil dosing control is primarily manual. The process involves operators manually adjusting valve openings based on readings from glass rotor flowmeters or ordinary differential pressure flowmeters on the pipeline, thus controlling the vanadium removal oil dosing rate. This control method has several technical drawbacks: First, low control accuracy; subjective errors are easily introduced by manual readings and valve adjustments, making it difficult to maintain a stable oil dosing ratio over the long term. Second, sluggish response; when the titanium tetrachloride feed flow fluctuates, manual adjustments cannot achieve real-time dynamic matching, easily causing the oil dosing ratio to deviate from the process threshold during the control window. Third, high labor intensity; dedicated personnel are required to continuously monitor flowmeter readings and frequently perform valve adjustments. Fourth, significant material loss; an excessively high oil dosing ratio leads to ineffective consumption of vanadium removal oil, while an excessively low ratio results in incomplete vanadium removal, requiring rework of substandard materials and increasing production costs. Fifth, product quality fluctuations; instability in the oil dosing ratio directly affects vanadium removal efficiency, making it difficult to guarantee the consistency of the final sponge titanium product quality.

[0005] In summary, developing a device capable of automatically, accurately, and stably controlling the mass ratio of vanadium-removing oil to titanium tetrachloride is of significant engineering application value and practical importance for improving the production efficiency of sponge titanium, reducing material consumption costs, and ensuring product quality stability. Summary of the Invention

[0006] The present invention aims to solve the technical problem of developing a device that can automatically, accurately, and stably control the mass ratio of vanadium-removing oil to titanium tetrachloride, which has important engineering application value and practical significance for improving the production efficiency of sponge titanium, reducing material consumption costs, and ensuring product quality stability.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An automated, interconnected titanium tetrachloride vanadium removal system includes an oil storage tank, pump A, regulating valve A, mass flow meter A, titanium tetrachloride storage tank, pump B, regulating valve B, mass flow meter B, mixer, pipeline A, and pipeline B. The oil storage tank is connected to one end of pipeline A, and the other end of pipeline A is connected to one end of pipeline B and then to the mixer. The other end of pipe B is connected to a titanium tetrachloride storage tank; Pipeline A is a vanadium-removing oil supply pipeline, and pump A, regulating valve A and mass flow meter A are sequentially installed along the fluid direction; The titanium tetrachloride supply pipeline B is equipped with a pump B, a regulating valve B, and a mass flow meter B in sequence along the fluid direction.

[0008] Mass flow meter A, mass flow meter B, regulating valve A, and regulating valve B are all electrically connected to the central control unit.

[0009] The central control unit is configured to execute the following logic control method: Real-time reception of the actual mass flow signal Q-TiCl4 of titanium tetrachloride detected by the mass flow meter B; Based on the preset target mass ratio K = 0.003~0.006 (i.e. 3~6 kg / t), the target set flow rate of vanadium-removing oil, Q-Oil Setpoint = Q-TiCl4× K, is calculated in real time. The actual mass flow rate signal Q-Oil of the vanadium-removing oil detected by the mass flow meter A is received in real time. The target set flow rate Q-Oil Setpoint is compared with the actual flow rate Q-Oil, and the calculation is performed using the built-in PID control algorithm, and a control signal is output to the regulating valve A; The regulating valve A adjusts its opening degree according to the received control signal, so that the actual flow rate Q-Oil of the vanadium-removing oil dynamically follows and stabilizes at the target set flow rate Q-Oil Setpoint.

[0010] The beneficial effects of adopting the above technical solution are: Compared with the prior art, the present invention has the following significant advantages: 1. Precise control and high stability: By adopting a high-precision mass flow meter and PLC closed-loop control, the oil-to-fuel ratio can be precisely controlled near the set value with minimal fluctuation, completely solving the problem of low precision in manual control.

[0011] 2. Rapid response and dynamic control: The PLC performs real-time calculations, enabling the system to respond instantly to any changes in the titanium tetrachloride flow rate and automatically adjust the vanadium removal oil flow rate, thus achieving dynamic synchronous control of the main and auxiliary materials.

[0012] 3. High degree of automation, reduced manpower: The vanadium removal process is automated and unattended, which greatly reduces the labor intensity of operators and the rate of human error, and improves production efficiency.

[0013] 4. Cost savings and significant benefits: Precise ratio control avoids waste of vanadium removal oil while ensuring the vanadium removal effect, reducing rework losses, and bringing direct economic benefits to enterprises.

[0014] 5. Ensuring quality and enhancing competitiveness: Stable process conditions ensure a high degree of consistency in the purity of titanium tetrachloride products after vanadium removal, laying a solid raw material foundation for the production of high-quality sponge titanium and enhancing the product's market competitiveness.

[0015] 6. Compared with the control method that relies on weighing sensors to obtain the dosage of vanadium removal oil, this solution fundamentally avoids the metering deviation problem caused by the vanadium removal oil stagnation and wall adhesion in the pipeline from the storage tank to the reaction unit by online detection and dynamic quantitative calculation of the real-time flow rate of vanadium removal oil in the delivery pipeline, and realizes precise control of the dosage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the automatic control system for removing vanadium from titanium tetrachloride according to the present invention.

[0017] In the diagram: 1-Oil storage tank, 2-Pump A, 3-Regulating valve A, 4-Mass flow meter A, 5-Titanium tetrachloride storage tank, 6-Pump B, 7-Regulating valve B, 8-Mass flow meter B, 9-Mixer, 10-Pipeline A, 11-Pipeline B. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the examples in the specification.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0020] Please see the appendix Figure 1 This invention provides an automated, interconnected titanium tetrachloride vanadium removal device. The device mainly consists of a vanadium removal oil supply unit, a titanium tetrachloride supply unit, a mixing reaction unit, and a central control unit.

[0021] The vanadium-removing oil supply unit includes 1-vanadium-removing oil storage tank, 2-pump A, 3-regulating valve A, 4-mass flow meter A, and 10-pipeline A. The vanadium-removing oil in storage tank 1 is pressurized by pump A2 and then transported through pipeline A10. Regulating valve A3 and mass flow meter A4 are sequentially installed on pipeline A10 to measure and regulate the flow rate of the vanadium-removing oil.

[0022] The titanium tetrachloride supply unit includes 5-titanium tetrachloride storage tank, 6-pump B, 7-regulating valve B, 8-mass flow meter B, and 11-pipeline B. Liquid TiCl4 in the 5-titanium tetrachloride storage tank is pressurized by pump B6 and then transported through pipeline B11. Regulating valve B7 and mass flow meter B8 are sequentially installed on pipeline B11 for measuring and regulating the flow rate of TiCl4.

[0023] The mixing reaction unit is a 9-mixing reactor. The ends of pipes A10 and B11 are connected to the 9-mixing reactor to fully mix TiCl4 and vanadium-removing oil and complete the vanadium removal reaction.

[0024] The central control unit is a programmable logic controller (PLC). Mass flow meter A4, mass flow meter B8, regulating valve A3, and regulating valve B7 are all connected to the PLC via signal lines.

[0025] The working process of this embodiment is as follows: After the system starts up, pumps A2 and B6 begin to work, pumping vanadium oil and TiCl4 to their respective pipelines.

[0026] Mass flow meter B8 monitors the mass flow rate Q-TiCl4 of TiCl4 in pipe B11 in real time and sends this data (such as a 4-20mA standard signal) to the PLC.

[0027] Upon receiving Q-TiCl4, the PLC immediately calculates the required target flow rate Q-Oil Setpoint for vanadium removal by multiplying it by the proportional coefficient K according to its internal preset program.

[0028] At the same time, the mass flow meter A4 also sends the detected actual flow rate of vanadium-removing oil Q-Oil to the PLC in real time.

[0029] The PLC compares the Q-Oil Setpoint with the Q-Oil, performs calculations using the PID algorithm, and outputs an adjustment signal to the control valve A3.

[0030] The regulating valve A3 precisely adjusts its valve opening based on this signal, increasing or decreasing the flow rate of vanadium-removing oil, so that the actual flow rate Q-Oil always tracks and equals the target set flow rate Q-Oil Setpoint.

[0031] When the production load changes (taking K=0.004 as an example), for instance, when the TiCl4 flow rate increases from 10 t / h to 12 t / h, the mass flow meter B8 immediately transmits the new flow rate to the PLC. The PLC then immediately adjusts the target flow rate of the vanadium removal oil from 40 kg / h (10*4) to 48 kg / h (12*4) and drives the regulating valve A3 to open wider. The entire process is completed within a few seconds, achieving automatic control.

[0032] Optional Implementation Examples: The system can be configured with a human-machine interface (HMI touch screen) and connected to a PLC to display real-time process parameters, set the oil-fuel ratio, switch between manual / automatic modes, and display alarm information.

[0033] To further stabilize the system, regulating valve B7 can also be controlled by a PLC to stabilize the total supply flow of TiCl4, providing a more stable foundation for subsequent precise proportioning.

[0034] The system can integrate data recording functions to store historical flow, oil-fuel ratio, and other data, facilitating production traceability and process optimization.

Claims

1. An automated, interconnected titanium tetrachloride vanadium removal system, characterized in that: It includes an oil storage tank (1), pump A (2), regulating valve A (3), mass flow meter A (4), titanium tetrachloride storage tank (5), pump B (6), regulating valve B (7), mass flow meter B (8), mixer (9), pipeline A (10), and pipeline B (11). The oil storage tank (1) is connected to one end of pipe A (10), and the other end of pipe A (10) is connected to one end of pipe B (11) and then connected to the mixer (9); The other end of the pipe B (11) is connected to the titanium tetrachloride storage tank (5); The pipeline A (10) is a vanadium-free oil supply pipeline, and a pump A (2), a regulating valve A (3) and a mass flow meter A (4) are arranged sequentially along the fluid direction. The pipeline B (11) is a titanium tetrachloride supply pipeline, and a pump B (6), a regulating valve B (7) and a mass flow meter B (8) are arranged sequentially along the fluid direction.

2. The automatic control system for removing vanadium from titanium tetrachloride according to claim 1, characterized in that: The mass flow meter A (4), mass flow meter B (8), regulating valve A (3) and regulating valve B (7) are all electrically connected to the central control unit.

3. The central control unit of the automatic control system for removing vanadium from titanium tetrachloride as described in claim 2 is configured to execute the following logic control method, including the following steps: The actual mass flow rate signal of titanium tetrachloride, Q-TiCl4, detected by the mass flow meter B (8) is received in real time. Based on the preset target mass ratio K = 0.003~0.006 (i.e. 3~6 kg / t), the target set flow rate of vanadium-removing oil, Q-Oil Setpoint = Q-TiCl4 × K, is calculated in real time. The actual mass flow rate signal Q-Oil of the vanadium-free oil detected by the mass flow meter A (4) is received in real time. The target set flow rate Q-Oil Setpoint is compared with the actual flow rate Q-Oil, and the calculation is performed by the built-in PID control algorithm, and a control signal is output to the regulating valve A (3); The regulating valve A (3) adjusts its opening according to the received control signal so that the actual flow rate Q-Oil of the vanadium-removing oil dynamically follows and stabilizes at the target set flow rate Q-Oil Setpoint.

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