A method for improving the recovery rate in the preparation process of crude titanium tetrachloride

Abstract

The present invention relates to the field of preparing crude titanium tetrachloride, and in particular to a method for improving the recovery rate in the preparation process of crude titanium tetrachloride. The method is to discharge the tail gas after treatment through a tail gas cyclone recovery device; the tail gas cyclone recovery device comprises a shell, and a tail gas inlet (4) and a tail gas outlet (7) are arranged on the shell; the inside of the shell is divided into more than one partition space by a partition wall (10); a cyclone cooling part, i.e., a spiral cooling wall (14), is arranged in one of the partition spaces, and a fin heat exchange part is arranged in another partition space; the separated tail gas is captured and condensed again, so that the single channel of the spiral airflow cooling space (12) of the capture device has a sedimentation function and the state of the fin heat exchange and cyclone structure therein, and the gas that has not been completely condensed at the front end is collected for a second time, and the gas is recovered by relying on the structural particularity of the device, while solving the stability of the tail gas system and improving the recovery rate of the crude titanium tetrachloride preparation.

Description

Technical Field

[0001] The invention relates to the field of preparing crude titanium tetrachloride, and in particular to a method for improving the recovery rate in the preparation process of crude titanium tetrachloride. Background Art

[0002] At present, the post-preparation process of preparing crude titanium tetrachloride is to separate the gas and liquid phases through elution and condensation through a gas-liquid separator and then enter the tail gas system for treatment. However, in the process, the gas phase titanium tetrachloride cannot be completely cooled due to the front-end cooling. After reaching the gas-liquid separator, the gas phase directly enters the tail gas system, causing the loss of part of the titanium tetrachloride recovered by condensation and causing the tail gas system to be blocked, resulting in the breakdown of system stability.

[0003] A search using "crude titanium tetrachloride and cooling" as the abstract keyword in the Chinese patent disclosure database did not find any relevant patents. Summary of the invention

[0004] Purpose of the invention: To provide a method for improving the recovery rate in the preparation process of crude titanium tetrachloride with better effect. The specific purpose is shown in the multiple substantial technical effects of the specific implementation part.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A method for improving the recovery rate in the preparation process of crude titanium tetrachloride, characterized in that:

[0007] This method discharges the tail gas after being processed by a tail gas cyclone recovery device;

[0008] The tail gas cyclone recovery device comprises a shell, on which a tail gas inlet 4 and a tail gas outlet 7 are arranged;

[0009] The interior of the housing is divided into more than one partition space by a partition wall 10;

[0010] A cyclone cooling part, i.e., a spiral cold wall 14, is arranged in one of the partitioned spaces, and a fin heat exchange part is arranged in another partitioned space;

[0011] A spiral airflow cooling space 12 is arranged in the middle of the spiral cooling wall 14. The spiral airflow cooling space 12 includes a one-way channel. The exhaust gas can fully exchange heat with the water-cooled wall through the one-way channel. The spiral cooling wall 14 is a sandwich structure that connects the spiral cooling water inlet 13 and the spiral cooling water return port 15.

[0012] The fin heat exchange part includes a fin heat exchanger water inlet 16 and one or more fin heat exchanger water return ports;

[0013] The lower part of the shell includes a slag discharge port;

[0014] The separated tail gas is captured and condensed again, so the single channel of the spiral airflow cooling space 12 of the capture equipment has a sedimentation function and the state of the fin heat exchange and cyclone structure therein, and the gas that has not been completely condensed at the front end is collected for a second time and recovered by relying on the structural particularity of this equipment, while solving the stability of the tail gas system and improving the recovery rate of crude titanium tetrachloride preparation.

[0015] A further technical solution of the present invention is that the circulating elution device 1 is connected to the intercooling device 2 and then connected to the gas-liquid separator 3 , and the gas pipeline of the gas-liquid separator 3 is connected to the tail gas inlet 4 .

[0016] A further technical solution of the present invention is that a spray system is arranged in the housing.

[0017] A further technical solution of the present invention is that a water outlet is arranged below the shell, and the water outlet is connected to the circulating rinsing device 1.

[0018] A further technical solution of the present invention is that the partition wall 10 includes two partition walls, the cyclone cooling part is arranged in the leftmost partition wall, and the exhaust gas inlet 4 is correspondingly arranged thereon.

[0019] A further technical solution of the present invention is that the exhaust gas outlet 7 is connected to the exhaust gas system 6 .

[0020] The present invention adopting the above technical solution has the following beneficial effects compared with the prior art: after this technical improvement, the tail gas separated by the enterprise is captured and condensed again. Therefore, due to the particularity of the capture equipment, the single channel has a sedimentation function and the state of the fin heat exchange and cyclone structure, the gas that has not been completely condensed at the front end is collected for the second time, and it is recovered by relying on the structural particularity of this equipment. At the same time, the stability of the tail gas system is solved and the recovery rate of crude titanium tetrachloride preparation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to further illustrate the present invention, the following is further described in conjunction with the accompanying drawings:

[0022] Figure 1 A schematic diagram of the invention;

[0023] Figure 2 Figure 1 is a diagram of the prior art;

[0024] Among them: 1. Circulating elution device; 2. Intercooling device; 3. Gas-liquid separator; 4. Exhaust gas inlet; 5. Exhaust gas outlet pipe; 6. Exhaust gas system; 7. Exhaust gas outlet; 8. Fin heat exchanger return water port 1; 9. Fin heat exchanger return water port 2; 10. Partition wall; 11. Fin heat exchanger; 12. Spiral airflow cooling space; 13. Spiral cold water inlet; 14. Spiral cold wall; 15. Spiral cooling return water port; 16. Fin heat exchanger water inlet. DETAILED DESCRIPTION

[0025] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] This patent provides a variety of parallel solutions. The different expressions are improved solutions or parallel solutions based on the basic solution. Each solution has its own unique characteristics. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The fixing method not described in the text can be any fixing method such as thread fixing, bolt fixing or glue bonding.

[0028] Embodiment 1: Combination Figure 1 and Figure 2 For comparison; A method for improving the recovery rate in the preparation process of crude titanium tetrachloride, characterized in that,

[0029] This method discharges the tail gas after being processed by a tail gas cyclone recovery device;

[0030] The tail gas cyclone recovery device comprises a shell, on which a tail gas inlet 4 and a tail gas outlet 7 are arranged;

[0031] The interior of the housing is divided into more than one partition space by a partition wall 10;

[0032] A cyclone cooling part, i.e., a spiral cold wall 14, is arranged in one of the partitioned spaces, and a fin heat exchange part is arranged in another partitioned space;

[0033] A spiral airflow cooling space 12 is arranged in the middle of the spiral cooling wall 14. The spiral airflow cooling space 12 includes a one-way channel. The exhaust gas can fully exchange heat with the water-cooled wall through the one-way channel. The spiral cooling wall 14 is a sandwich structure that connects the spiral cooling water inlet 13 and the spiral cooling water return port 15.

[0034] The fin heat exchange part includes a fin heat exchanger water inlet 16 and one or more fin heat exchanger water return ports;

[0035] The lower part of the shell includes a slag discharge port;

[0036] The substantial technical effect of the technical solution herein and its implementation process, i.e., the basic function, are as follows: the separated tail gas is captured and condensed again, so the single channel of the spiral airflow cooling space 12 of the capture device has a sedimentation function and the fin heat exchange and cyclone structure therein, and the gas that has not been completely condensed at the front end is collected for the second time, and is recovered by relying on the structural particularity of this equipment, while solving the stability of the tail gas system and improving the recovery rate of crude titanium tetrachloride preparation.

[0037] Embodiment 2: As a further improved solution or parallel solution or optional independent solution, the circulating elution device 1 is connected to the intercooling device 2 and then connected to the gas-liquid separator 3, and the gas pipeline of the gas-liquid separator 3 is connected to the tail gas inlet 4. The substantial technical effect and the realization process of the technical solution here, i.e. the basic function, are as follows: the liquid after the gas-liquid separator 3 is further processed.

[0038] Embodiment 3: As a further improved solution or a parallel solution or an optional independent solution, a spray system is arranged in the shell. A water outlet is arranged below the shell, and the water outlet is connected to the circulating shower device 1.

[0039] Embodiment 4: As a further improved solution or parallel solution or optional independent solution, the partition wall 10 includes two, and the leftmost partition wall is provided with the cyclone cooling part, on which the exhaust gas inlet 4 is correspondingly provided. The exhaust gas outlet 7 is connected to the exhaust gas system 6. The substantial technical effect and the implementation process of the technical solution here, i.e., the basic function, are as follows: the partition wall 10 preferably contacts the upper side of the spiral cooling wall 14.

[0040] It should be noted that the multiple solutions provided by this patent include the basic solution itself, which are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects together.

[0041] The basic principle, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the protection required.

Claims

1. A method for improving the recovery rate in the preparation process of crude titanium tetrachloride, characterized in that: This method discharges the tail gas after being processed by a tail gas cyclone recovery device; The tail gas cyclone recovery device comprises a shell, on which a tail gas inlet (4) and a tail gas outlet (7) are arranged; The interior of the housing is divided into more than one partitioned space by a partition wall (10); A cyclone cooling part, i.e. a spiral cooling wall (14), is arranged in one of the partitioned spaces, and a fin heat exchange part is arranged in another partitioned space; A spiral airflow cooling space (12) is arranged in the middle of the spiral cooling wall (14). The spiral airflow cooling space (12) includes a one-way channel. The exhaust gas can fully exchange heat with the water-cooled wall through the one-way channel. The spiral cooling wall (14) is a sandwich structure that connects the spiral cooling water inlet (13) and the spiral cooling water return port (15). The fin heat exchange part comprises a fin heat exchanger water inlet (16) and one or more fin heat exchanger water return ports; The lower part of the shell includes a slag discharge port; The separated tail gas is captured and condensed again, and the one-way channel of the spiral airflow cooling space (12) has a sedimentation function, a fin heat exchange function, and a cyclone function, and the gas that has not been completely condensed at the front end is collected for a second time, and the gas is recovered by the structural particularity of this equipment, thereby solving the problem of the stability of the tail gas system and improving the recovery rate of the crude titanium tetrachloride preparation; The partition wall (10) includes two partition walls, the cyclone cooling part is arranged in the leftmost partition wall, and the exhaust gas inlet (4) is correspondingly arranged on the partition wall; the partition wall (10) contacts the upper part of the spiral cooling wall (14).

2. A method for improving the recovery rate in the preparation process of crude titanium tetrachloride as claimed in claim 1, characterized in that: The circulating elution device (1) is connected to the intercooling device (2) and then to the gas-liquid separator (3), and the gas pipeline of the gas-liquid separator (3) is connected to the tail gas inlet (4).

3. A method for improving the recovery rate in the preparation process of crude titanium tetrachloride as claimed in claim 2, characterized in that: A spray system is arranged in the shell.

4. A method for improving the recovery rate in the preparation process of crude titanium tetrachloride as claimed in claim 3, characterized in that: A water outlet is arranged below the shell, and the water outlet is connected to the circulating rinsing device (1).

5. A method for improving the recovery rate in the preparation process of crude titanium tetrachloride as claimed in claim 1, characterized in that: The tail gas outlet (7) is connected to the tail gas system (6).

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