Cold hydrogenation vaporizer
By designing a backwashing system in a cold hydrogenated vaporizer, backwashing the slag discharge pipe with silicon tetrachloride solution, the problem of caulking is solved, the product quality is improved and the maintenance cost is reduced.
Patent Information
- Application Number
- CN202421653204.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The vaporizer is prone to blockage, the main reason is that the silicon tetrachloride solution contains impurities and silicon powder, which causes impurities to accumulate during the vaporization process, block the discharge port, affect the product quality and increase maintenance costs.
A cold hydrogenation vaporizer is designed, including a slag discharge pipeline and a flushing pipeline. By backflushing the slag discharge pipe, the blocked impurities and silicon powder are used to rinse the blocked impurities and silicon powder to avoid blockage and remove impurities in time.
It effectively avoids clogging of the discharge port of the vaporizer, ensures timely removal of impurities, improves product quality, and reduces maintenance costs. The backwashing operation does not affect the normal operation of the vaporizer.
Smart Images
Figure CN222804688U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vaporizers, in particular to a cold hydrogenation vaporizer. Background Art
[0002] In the distillation section, the silicon tetrachloride solution purified by the pre-distillation tower is mixed with the recovered hydrogen, heated by a heat exchanger and vaporized. The vaporizer is heated by steam, and the vaporized silicon tetrachloride, hydrogen mixture and silicon powder react in a reactor.
[0003] In the prior art, the vaporizer is prone to clogging. The main reason is that the silicon tetrachloride solution entering the vaporizer contains impurities and silicon powder. Although it is filtered at the inlet filter of the delivery pump, there are still a small amount of impurities and silicon powder in the silicon tetrachloride solution. As time goes by, during the vaporization process, the impurities are resolved and clog the discharge port of the vaporizer, resulting in the inability to remove impurities in the system in time, affecting product quality. In severe cases, the single line needs to be shut down for maintenance before being put into use, and the maintenance cost is relatively high. Utility Model Content
[0004] The utility model aims to develop a cold hydrogenation vaporizer which can backwash the vaporizer to avoid clogging of the vaporizer discharge port.
[0005] The utility model is achieved through the following technical solutions:
[0006] A cold hydrogenation vaporizer, comprising:
[0007] case;
[0008] A heating component is arranged in the shell;
[0009] A feed pipeline and a discharge pipeline are connected to the shell;
[0010] A slag discharge pipeline is arranged at the bottom of the shell and is connected thereto;
[0011] The slag discharge pipeline is connected with a flushing pipeline, the feed pipeline transports silicon tetrachloride and hydrogen, and the flushing pipeline transports silicon tetrachloride.
[0012] Optionally, the heating component includes a head provided on the shell, a vaporization tube bundle connected to the head is provided in the shell, and a steam pipe and a condensate pipe are connected to the vaporization tube bundle.
[0013] Optionally, a first connecting cavity and a second connecting cavity are provided inside the end cap, the vaporization tube bundle is U-shaped and its two ends are respectively connected to the first connecting cavity and the second connecting cavity, the steam pipe is connected to the first connecting cavity, and the condensate pipe is connected to the second connecting cavity.
[0014] Optionally, the slag discharge pipeline includes a slag discharge main pipe and a plurality of slag discharge branch pipes connected to the slag discharge main pipe, the slag discharge branch pipes are connected to the bottom of the shell, and the flushing pipeline is connected to the slag discharge branch pipes.
[0015] Optionally, a second valve is provided on the slag discharge branch pipe, and the second valve is located between the flushing pipeline and the slag discharge main pipe on the slag discharge branch pipe.
[0016] Optionally, the slag discharge main pipe is connected to a washing tower.
[0017] Optionally, the flushing pipeline includes a flushing main pipe and a plurality of flushing branch pipes whose number corresponds to the slag discharge branch pipes, and the plurality of flushing branch pipes are respectively connected to the plurality of slag discharge branch pipes.
[0018] Optionally, a first valve is provided on the flushing branch pipe.
[0019] Optionally, a pressure gauge is provided on the flushing main pipe.
[0020] The beneficial effects of the utility model are:
[0021] The utility model can backwash the slag discharge branch pipe connected to the vaporizer to wash away the impurities and silicon powder blocking the pipeline, thereby avoiding the blockage that causes the impurities to be unable to be removed in time and affects the product quality. The backwashing operation does not affect the work of the vaporizer, and the silicon tetrachloride used for backwashing can also be used as a material to supplement the vaporizer. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a structural schematic diagram of the utility model.
[0024] Figure numerals: 1. Shell; 2. Vaporization tube bundle; 3. Head; 4. Steam pipe; 5. Condensate pipe; 6. Feed pipeline; 7. Discharge pipeline; 8. Flushing main pipe; 9. Flushing branch pipe; 10. First valve; 11. Slag discharge branch pipe; 12. Second valve; 13. Slag discharge main pipe; 14. Scrubber. DETAILED DESCRIPTION
[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0026] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0027] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.
[0028] like Figure 1 As shown, the utility model discloses a cold hydrogenation vaporizer, comprising a shell 1, a heating component is arranged inside the shell 1, and a feed pipeline 6 and a discharge pipeline 7 are connected to the shell 1.
[0029] The heating assembly includes a head 3 arranged on a shell 1, a vaporization tube bundle 2 connected to the head 3 is arranged in the shell 1, a first connecting cavity and a second connecting cavity are arranged inside the head 3, the vaporization tube bundle 2 is U-shaped and the two ends are respectively connected to the first connecting cavity and the second connecting cavity, and a steam pipe 4 connected to the first connecting cavity and a condensate pipe 5 connected to the second connecting cavity are arranged on the head 3.
[0030] The feed pipeline 6 is connected to the upper part of the shell 1, and the feed pipeline 6 transports silicon tetrachloride and hydrogen. The discharge pipeline 7 is connected to the upper part of the shell 1, and the vaporized silicon tetrachloride and the heated hydrogen are output through the discharge pipeline 7.
[0031] The slag discharge pipeline is connected to the bottom of the shell 1, and includes three slag discharge branch pipes 11 and a slag discharge main pipe 13. The three slag discharge branch pipes 11 are respectively connected to the bottom of the shell 1, and the three slag discharge branch pipes 11 are connected to the shell 1 at equal intervals in the length direction of the shell 1. The three slag discharge branch pipes 11 are all connected to the slag discharge main pipe 13, and the slag discharge main pipe 13 is connected to the washing tower 14.
[0032] The slag discharge pipeline is connected with a flushing pipeline, which includes a flushing main pipe 8, which conveys silicon tetrachloride solution. The flushing main pipe 8 is provided with a pressure gauge. The flushing main pipe 8 is connected with three flushing branch pipes 9, which are respectively connected with three slag discharge branch pipes 11. The three flushing branch pipes 9 are each provided with a first valve 10, and the three slag discharge branch pipes 11 are each provided with a second valve 12. The second valve 12 is provided between the flushing branch pipe 9 and the slag discharge main pipe 13 on the slag discharge branch pipe 11. After the second valve 12 is closed, the material output from the flushing branch pipe 9 is blocked by the second valve 12 and does not enter the slag discharge main pipe 13.
[0033] The feed pipeline 6 transports silicon tetrachloride and hydrogen into the shell 1. The high-temperature steam flowing in the vaporization tube bundle 2 heats the silicon tetrachloride and hydrogen. After the silicon tetrachloride is vaporized, it is discharged from the discharge pipeline 7 with hydrogen. The silicon powder and impurities precipitated in the silicon tetrachloride are discharged from the slag discharge pipeline. Three slag discharge branch pipes 11 are arranged at the bottom of the vaporizer. Impurities and silicon powder are discharged from the shell 1 through the three slag discharge branch pipes 11 and merged into the slag discharge main pipe 13 and then input into the washing tower 14. After a period of time, the slag discharge pipe 11 and the connection between the slag discharge pipe 11 and the shell 1 may be blocked by impurities and silicon powder. At this time, the second valve 12 is closed, and the first valve 10 on the flushing pipe 9 connected thereto is opened to ensure that the feed pressure in the flushing main pipe 8 is greater than the internal pressure of the shell 1. The silicon tetrachloride solution transported by the flushing pipe 9 flows upward in the slag discharge pipe 11 to achieve backwashing, so that the impurities and silicon powder that block or adhere to the slag discharge pipe 11 fall off. During the flushing process, the first valve 10 is opened and closed intermittently, so that the silicon tetrachloride solution pulses and flushes the slag discharge pipe 11. After the flushing is completed, the first valve 10 is closed and the second valve 12 is opened to resume the slag discharge work of the slag discharge pipe 11. The slag discharge pipeline is provided with three slag discharge branch pipes 11. When one or two of the slag discharge branch pipes 11 are backwashed, the other slag discharge branch pipes 11 can work normally to ensure the progress of the slag discharge operation. At the same time, there is no need to stop the vaporizer. Backwashing is performed through silicon tetrachloride solution, and the silicon tetrachloride entering the vaporizer can be directly vaporized without introducing other media or impurities.
[0034] The utility model can backwash the slag discharge branch pipe 11 connected to the vaporizer to wash away impurities and silicon powder blocking the pipeline, thereby avoiding the blockage that causes the impurities to be unable to be removed in time and affects the product quality. The backwashing operation does not affect the work of the vaporizer, and the silicon tetrachloride used for backwashing can also be used as a material to supplement the vaporizer.
[0035] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.
Claims
1. A cold hydrogenation vaporizer, characterized in that: include: case; A heating component is disposed in the shell; A feed pipeline and a discharge pipeline are connected to the shell; A slag discharge pipeline is arranged at the bottom of the shell and is connected thereto; The slag discharge pipeline is connected with a flushing pipeline, the feed pipeline transports silicon tetrachloride and hydrogen, and the flushing pipeline transports silicon tetrachloride.
2. The cold hydrogenation vaporizer according to claim 1, characterized in that: The heating component comprises a sealing head arranged on a shell, a vaporization tube bundle connected to the sealing head is arranged in the shell, and a steam pipe and a condensate pipe are connected to the vaporization tube bundle.
3. The cold hydrogenation vaporizer according to claim 2, characterized in that: A first connecting cavity and a second connecting cavity are arranged inside the end cap, the vaporization tube bundle is U-shaped and its two ends are respectively connected to the first connecting cavity and the second connecting cavity, the steam tube is connected to the first connecting cavity, and the condensate tube is connected to the second connecting cavity.
4. The cold hydrogenation vaporizer according to claim 1, characterized in that: The slag discharge pipeline includes a slag discharge main pipe and a plurality of slag discharge branch pipes connected to the slag discharge main pipe, the slag discharge branch pipes are connected to the bottom of the shell, and the flushing pipeline is connected to the slag discharge branch pipes.
5. The cold hydrogenation vaporizer according to claim 4, characterized in that: The slag discharge branch pipe is provided with a second valve, and the second valve is located between the flushing pipeline and the slag discharge main pipe on the slag discharge branch pipe.
6. The cold hydrogenation vaporizer according to claim 4, characterized in that: The slag discharge main pipe is communicated with the washing tower.
7. The cold hydrogenation vaporizer according to claim 5, characterized in that: The flushing pipeline includes a flushing main pipe and a plurality of flushing branch pipes corresponding in number to the slag discharge branch pipes, and the plurality of flushing branch pipes are respectively connected to the plurality of slag discharge branch pipes.
8. The cold hydrogenation vaporizer according to claim 7, characterized in that: The flushing branch pipe is provided with a first valve.
9. The cold hydrogenation vaporizer according to claim 8, characterized in that: A pressure gauge is provided on the flushing main pipe.