A molten salt chlorination furnace

Abstract

The molten salt chlorination furnace disclosed by the application comprises a furnace body, a feeding device and a stock bin. The feeding device comprises a plurality of feeding assemblies, each feeding assembly is symmetrically arranged on two sides of the furnace body, and each feeding assembly comprises at least two parallelly arranged screw feeding mechanisms. The stock bin is connected with each screw feeding mechanism to convey materials to each screw feeding mechanism. In actual use, the materials in the stock bin are conveyed to each screw feeding mechanism, and the materials are conveyed into the hearth of the furnace body by each screw feeding mechanism. The feeding mode from both sides of the furnace body can improve the phenomenon that the material concentration on one side of the furnace body is too high due to the single-side feeding of the existing furnace body, and improve the uniformity of material distribution. The mode of a plurality of feeding assemblies can make each feeding assembly serve as a backup for each other, and improve the operation reliability of the molten salt chlorination furnace.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and more specifically, to a molten salt chlorination furnace. Background Technology

[0002] The chlorination process for producing titanium tetrachloride involves suspending titanium slag and petroleum coke in a molten salt medium (mainly composed of NaCl, KCl, FeCl2, MgCl2, and CaCl2), which then reacts with chlorine gas to generate titanium tetrachloride. At high temperatures, solid particles suspended in a molten salt system dominated by sodium chloride undergo a carbothermic chlorination reaction. The composition and properties of the solid materials, the behavior of chlorine gas after entering the molten salt, the behavior of the titanium slag and petroleum coke particles, and their physical properties all directly affect the chlorination efficiency and yield.

[0003] The main problem with existing molten salt chlorination furnaces is that when the production capacity increases, the amount of material pushed into the furnace by the screw increases sharply, resulting in a high concentration of solid material on one side of the furnace. In addition, the reaction process is violent, and the amount of titanium tetrachloride and carbon dioxide gas produced locally increases. When the volatilization is large, it can easily cause smoke to come out of the screw feeder or affect its stable material sealing state.

[0004] Therefore, how to improve the uniformity of material distribution in molten salt chlorination furnaces and increase reaction efficiency has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a molten salt chlorination furnace to improve the uniformity of material distribution inside the furnace and improve reaction efficiency.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A molten salt chlorination furnace, comprising:

[0008] Furnace body;

[0009] The feeding device includes multiple feeding components, each of which is symmetrically arranged on both sides of the furnace body, and each feeding component includes at least two parallel spiral feeding mechanisms;

[0010] A hopper, which is connected to each of the screw feed mechanisms to deliver materials to each of the screw feed mechanisms.

[0011] Optionally, in the above-mentioned molten salt chlorination furnace, the screw feeding mechanism includes a screw cylinder, a screw body, and a drive assembly. The screw cylinder is connected to the furnace body, the screw body is rotatably disposed in the screw cylinder, and the drive assembly is connected to the screw body to drive the screw body to rotate.

[0012] The spiral cylinder has a feed inlet and a discharge outlet. The feed inlet is connected to the hopper, and the discharge outlet is connected to the furnace chamber of the furnace body.

[0013] Optionally, in the above-mentioned molten salt chlorination furnace, the spiral cylinder includes a first cylinder and a second cylinder, the first cylinder is connected to the furnace body, the second cylinder is disposed in the first cylinder, the spiral is rotatably disposed in the second cylinder, and the feed inlet and discharge outlet are respectively located at both ends of the second cylinder.

[0014] Optionally, in the above-mentioned molten salt chlorination furnace, the driving assembly includes a driving motor and a transmission assembly, the driving motor being connected to the transmission assembly, and the transmission assembly being connected to the spiral body.

[0015] Optionally, in the above-mentioned molten salt chlorination furnace, the spiral body includes a spiral shaft and a rotating blade assembly. The rotating blade assembly is disposed on the spiral shaft, and there are multiple rotating blade assemblies, with each rotating blade assembly spaced apart along the axial direction of the spiral body.

[0016] Optionally, in the above-mentioned molten salt chlorination furnace, the rotating blade assembly includes a plurality of rotating blades arranged radially along the helical shaft, and each of the rotating blades is arranged in a ring array along the axis of the helical shaft.

[0017] Optionally, in the above-mentioned molten salt chlorination furnace, the spiral shaft is detachably connected to the spiral cylinder, and / or the rotating blade assembly is detachably connected to the spiral shaft.

[0018] Optionally, in the above-mentioned molten salt chlorination furnace, the spiral body includes multiple detachably connected spiral body units.

[0019] Optionally, in the above-mentioned molten salt chlorination furnace, a refractory layer is provided at one end of the spiral cylinder that extends into the furnace body.

[0020] Optionally, in the above-mentioned molten salt chlorination furnace, a material concentration uniformity detection element is provided inside the furnace body.

[0021] As can be seen from the above scheme, in actual use, the material in the molten salt chlorination furnace disclosed in this application is transported to each screw feeding mechanism, and each screw feeding mechanism transports the material to the furnace chamber of the furnace body. By adopting the feeding method from both sides of the furnace body, the phenomenon of high material concentration on one side of the furnace body caused by single-side feeding in the existing furnace body can be improved, and the uniformity of material distribution can be improved. By adopting multiple feeding components, each feeding component can serve as a backup for the others, which can improve the operational reliability of the molten salt chlorination furnace. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the molten salt chlorination furnace disclosed in the embodiments of this application.

[0024] Among them, 100 is the furnace body, 200 is the feeding device, 210 is the feeding assembly, and 211 is the screw feeding mechanism. Detailed Implementation

[0025] The core of this application is to disclose a molten salt chlorination furnace to improve the uniformity of material distribution inside the furnace and increase reaction efficiency.

[0026] 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] like Figure 1 As shown in the figure, this application discloses a molten salt chlorination furnace, including a furnace body 100, a feeding device 200 and a hopper (not shown in the figure).

[0028] The feeding device 200 includes multiple feeding components 210, each symmetrically arranged on both sides of the furnace body 100. Each feeding component 210 includes at least two parallel spiral feeding mechanisms 211, meaning that material is fed from both sides of the furnace body 100. A hopper is connected to each spiral feeding mechanism 211 to deliver material to it. The figure shows two feeding components 210, each including two parallel spiral feeding mechanisms 211.

[0029] In actual use, the material in the hopper is conveyed to each screw feeding mechanism 211, which then conveys the material into the furnace chamber of the furnace body 100. By feeding from both sides of the furnace body 100, the problem of high material concentration on one side of the furnace body caused by feeding from only one side can be improved, thus enhancing the uniformity of material distribution. The use of multiple feeding components 210 allows each feeding component to serve as a backup for the others, thereby improving the operational reliability of the molten salt chlorination furnace.

[0030] Furthermore, the molten salt chlorination furnace includes a raw material conveying device for conveying materials into a silo. The silo is equipped with a material level detection element that can detect the material level in the silo. Based on the detected material level, the amount of material conveyed into the silo by the raw material conveying device is adjusted, and the amount of material fed from the silo to the screw feeder 211 is also adjusted.

[0031] Furthermore, the screw feeding mechanism 211 includes a screw cylinder, a screw body, and a drive assembly. The screw cylinder is connected to the furnace body 100, and the screw body is rotatably disposed within the screw cylinder. The drive assembly is connected to the screw body to drive the screw body to rotate, thereby conveying the material into the furnace chamber. The screw cylinder has an inlet and an outlet. The inlet is connected to a hopper, and the outlet communicates with the furnace chamber of the furnace body 100. The screw cylinder is preferably made of stainless steel. The material enters the screw feeding mechanism 211 through the inlet, and the screw body rotates, conveying the material to the outlet, from where it enters the furnace body 100.

[0032] Furthermore, in some specific embodiments, the spiral cylinder includes a first cylinder and a second cylinder. The first cylinder is connected to the furnace body 100, and the second cylinder is disposed within the first cylinder. The spiral is rotatably disposed within the second cylinder, with the inlet and outlet located at opposite ends of the second cylinder. Specifically, the second cylinder is inserted into the first cylinder, preferably connected to it by bolts. The first cylinder is preferably welded to the furnace body 100. Material enters through the inlet and exits through the outlet into the furnace chamber. Using a first and second cylinder facilitates the connection between the spiral cylinder and the furnace body 100, while also improving the robustness and stability of the spiral cylinder.

[0033] Furthermore, the drive assembly includes a drive motor and a transmission assembly, with the drive motor connected to the transmission assembly, and the transmission assembly connected to the screw. Specifically, the transmission assembly can be a chain, belt, or gear, preferably connected by a chain, to drive the screw to rotate. Preferably, each screw feeding mechanism 211 is equipped with its own drive assembly.

[0034] Furthermore, the spiral body includes a spiral shaft and rotating blade assemblies. The rotating blade assemblies are disposed on the spiral shaft, and there are multiple rotating blade assemblies, which are spaced apart along the axial direction of the spiral body. A drive motor drives the spiral shaft and rotating blade assemblies to rotate, so as to push the material to the furnace body 100.

[0035] Furthermore, the rotating blade assembly includes a plurality of rotating blades arranged radially along the helical axis, wherein each rotating blade is arranged in a ring array along the axis of the helical axis.

[0036] Furthermore, to facilitate inspection and maintenance, in some specific embodiments, the helical shaft and the helical cylinder are detachably connected, and / or the rotating blade assembly is detachably connected to the helical shaft. Specifically, both ends of the helical shaft can be supported by bearing seats, and the bearing seats are connected to the helical cylinder via flanges. During disassembly, the helical shaft can be pulled out by loosening the flange bolts for inspection and maintenance. A detachable clamp can be installed on the helical shaft, and a connecting piece is provided outside the clamp. The rotating blade assembly is connected to the connecting piece, specifically via bolts. If part of the rotating blade assembly is damaged, the damaged rotating blade assembly can be replaced by removing the clamp. It should be noted that the above embodiments are merely examples, and other methods may be adopted in practice.

[0037] Furthermore, in some specific embodiments, the helical body includes multiple detachably connected helical body units, that is, the helical shaft includes multiple interconnected segments, which can be connected by flanges. When a certain helical body unit fails and needs to be replaced, it can be removed and replaced without replacing the entire helical body.

[0038] Furthermore, a refractory layer is provided at one end of the spiral cylinder that extends into the furnace body 100. Specifically, the refractory layer can be provided circumferentially along the outer side of the spiral cylinder, and the thickness of the refractory layer can be determined according to the actual situation. Alternatively, the refractory layer can also be provided inside the spiral cylinder and between the spiral shaft. The refractory layer can reduce material coking and also provide heat insulation protection.

[0039] Furthermore, in order to detect the material concentration inside the furnace body 100, a material concentration uniformity detection element is installed inside the furnace body 100 to detect the material concentration inside the furnace body 100. Based on the detection results, the amount of material conveyed by each screw feeding mechanism 211 can be adjusted. Specifically, the material concentration uniformity detection element can be an ultrasonic sensor, or other types can be selected.

[0040] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0041] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0042] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0043] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A molten salt chlorination furnace, characterized in that, include: Furnace body (100); The feeding device (200) includes a plurality of feeding components (210), each of the feeding components (210) being symmetrically arranged on both sides of the furnace body (100), and each of the feeding components (210) including at least two parallel spiral feeding mechanisms (211). A hopper, which is connected to each of the screw feed mechanisms (211) to deliver material to each of the screw feed mechanisms (211).

2. The molten salt chlorination furnace as described in claim 1, characterized in that, The spiral feeding mechanism (211) includes a spiral cylinder, a spiral body and a drive assembly. The spiral cylinder is connected to the furnace body (100). The spiral body is rotatably disposed in the spiral cylinder. The drive assembly is connected to the spiral body to drive the spiral body to rotate. The spiral cylinder has a feed inlet and a discharge outlet. The feed inlet is connected to the hopper, and the discharge outlet is connected to the furnace chamber of the furnace body (100).

3. The molten salt chlorination furnace as described in claim 2, characterized in that, The spiral cylinder includes a first cylinder and a second cylinder. The first cylinder is connected to the furnace body (100), the second cylinder is disposed inside the first cylinder, and the spiral is rotatably disposed inside the second cylinder. The feed inlet and the discharge outlet are located at the two ends of the second cylinder, respectively.

4. The molten salt chlorination furnace as described in claim 2, characterized in that, The drive assembly includes a drive motor and a transmission assembly, the drive motor being connected to the transmission assembly, and the transmission assembly being connected to the helical body.

5. The molten salt chlorination furnace as described in claim 2, characterized in that, The helical body includes a helical shaft and rotating blade assemblies. The rotating blade assemblies are disposed on the helical shaft, and there are multiple rotating blade assemblies, which are spaced apart along the axial direction of the helical body.

6. The molten salt chlorination furnace as described in claim 5, characterized in that, The rotating blade assembly includes a plurality of rotating blades arranged radially along the helical axis, and each of the rotating blades is arranged in a circular array along the axis of the helical axis.

7. The molten salt chlorination furnace as described in claim 6, characterized in that, The helical shaft is detachably connected to the helical cylinder, and / or the rotating blade assembly is detachably connected to the helical shaft.

8. The molten salt chlorination furnace as described in claim 2, characterized in that, The helix comprises multiple detachably connected helix units.

9. The molten salt chlorination furnace as described in claim 2, characterized in that, A refractory layer is provided at one end of the spiral cylinder that extends into the furnace body (100).

10. The molten salt chlorination furnace according to any one of claims 1-9, characterized in that, The furnace body (100) is equipped with a material concentration uniformity detection element.

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