Safe feeding system of gas-liquid two-phase reaction kettle
By combining the adsorption tower and the drying chamber, the problem of incomplete removal of impurities in hydrogen was solved, the stability of hydrogen feed and effective control of reactor temperature were achieved, and product quality and production efficiency were improved.
Patent Information
- Application Number
- CN202423317507.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing equipment fails to effectively remove carbon dioxide, carbon monoxide, and water vapor from hydrogen, resulting in low product quality. Furthermore, the hydrogen feed is unstable, the reactor temperature is prone to sudden rises, and the cooling is not timely, affecting the stability of the equipment and product quality.
An adsorption tower and a drying chamber are used together to remove carbon dioxide and carbon monoxide from hydrogen. Water vapor is removed through the drying chamber. The hydrogen feed is stabilized by a pressure regulating valve and a flow controller. The temperature of the reactor is controlled by a coolant storage tank and an outlet pipeline to ensure stability.
It significantly improves the impurity removal rate of hydrogen, enhances product quality, ensures the stability of hydrogen feed, improves production efficiency and equipment operation stability, and prevents cooling reactions when the reactor temperature rises sharply.
Smart Images
Figure CN223717068U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to crude terephthalic acid hydrogenation refining technical field, concretely is gas -liquid two phase reaction kettle safe feeding system. BACKGROUND
[0002] In the polyester production process, the hydrogenation refining of crude terephthalic acid is a key step. Crude terephthalic acid may contain some colored impurities and impurities that have adverse effects on polyester production. These impurities can be removed by hydrogenation reaction to obtain high-purity terephthalic acid for producing high-quality polyester fibers and polyester bottles and other products.
[0003] When hydrogenation refining of crude terephthalic acid is performed, excessive temperature can cause an increase in side reactions, such as decomposition of terephthalic acid itself, and also affect the service life of the catalyst. Moreover, the entry of impurities is minimized to avoid catalyst deactivation. This requires a high purity of hydrogen gas. However, the existing device only adsorbs water contained in the hydrogen gas by drying, but does not treat carbon dioxide, carbon monoxide, acetylene and other impurities contained therein, resulting in low product quality. In addition, there are problems of unstable hydrogen gas feed, sudden temperature rise of the reaction kettle, and untimely cooling. SUMMARY
[0004] In view of the above deficiencies in the prior art, the utility model aims to provide a gas-liquid two-phase reaction kettle safe feeding system. By using the adsorption tower and the drying box together, carbon dioxide and carbon monoxide contained in the hydrogen gas are first removed, and then water vapor is removed by the drying box, greatly improving the hydrogen gas impurity removal rate and product quality. By using the pressure regulating valve and the flow controller together, the hydrogen gas feed is more stable. By providing the adsorption tower, the molecular sieve replacement is faster, improving the production efficiency. By using the cooling liquid tank, the high-level liquid outlet pipeline and the bottom liquid outlet pipeline together, under normal circumstances, the reaction kettle is temperature-controlled through the high-level liquid outlet pipeline, and when the temperature of the reaction kettle rises suddenly, the reaction kettle is cooled through the bottom liquid outlet pipeline, greatly improving the stability of the device operation.
[0005] The utility model is implemented by using the following technical solutions:
[0006] The utility model discloses a gas-liquid two-phase reaction kettle safe feeding system, which comprises an adsorption tower and a liquid preparation tank, the adsorption tower is connected with a drying box, the drying box is connected with a reaction kettle through a flow controller, the adsorption tower is connected with a pressure regulating valve through a pipeline, a hydrogen gas inlet pipeline is arranged on the pressure regulating valve, a reaction kettle temperature control sleeve is arranged on the outside of the reaction kettle, the liquid preparation tank is connected with the reaction kettle through a feed pump, a feed pipeline is connected between the feed pump and the reaction kettle, and the feed pipeline extends into the inside of the reaction kettle.
[0007] The hydrogen in the pressure regulating valve enters the lower part of the inclined support plate through a pipeline, and then enters the isolation through-hole column through the air vent, and the isolation through-hole column is provided with adsorbing material such as molecular sieve between the vertical wall of the adsorption tower, and the hydrogen passes through the adsorbing material and then is discharged from the adsorption tower through the gas phase outlet.
[0008] The vertical wall of the adsorption tower is provided with a molecular sieve outlet, and the adsorption tower is provided with a molecular sieve inlet and a gas phase outlet above the adsorption tower, and the molecular sieve inlet and the gas phase outlet are located on both sides of the isolation through-hole column, the upper part of the isolation through-hole column is in a sealed state, and the molecular sieve outlet is located above the inclined support plate.
[0009] The inside of the reaction kettle is provided with a stirring paddle, and the reaction kettle is connected with a vacuum pump.
[0010] The gas-liquid two-phase reaction kettle safety feeding system further comprises a refrigerator, the refrigerator is connected with the reaction kettle temperature control sleeve inlet through a cooling liquid storage tank, and the reaction kettle temperature control sleeve outlet is connected with the refrigerator through a pipeline.
[0011] The cooling liquid storage tank and the reaction kettle temperature control sleeve are provided with a cooling liquid frequency conversion pump, the bottom of the cooling liquid storage tank is connected with the cooling liquid frequency conversion pump through a bottom liquid outlet pipeline, and the cooling liquid storage tank and the cooling liquid frequency conversion pump are further connected with a high liquid outlet pipeline, and the connection position of the high liquid outlet pipeline and the cooling liquid storage tank is located at 1 / 2-2 / 3 of the vertical wall. The connection position of the high liquid outlet pipeline and the cooling liquid storage tank is located at 1 / 2-2 / 3 of the bottom surface of the cooling liquid storage tank.
[0012] Under normal circumstances, the reaction kettle is controlled in temperature through the high liquid outlet pipeline, and when the temperature of the reaction kettle rises suddenly, the working power of the cooling liquid frequency conversion pump is increased, and the reaction kettle is cooled through the bottom liquid outlet pipeline.
[0013] The working principle of the utility model is:
[0014] Before the reaction starts, the air blower and the vacuum pump are started, and the gas in the reaction kettle is replaced, and after the replacement is completed, the solvent and the catalyst are fed through the liquid preparation tank; then the hydrogen enters the adsorption tower through the pressure regulating valve, and the organic matter in the adsorption tower is adsorbed, and after the treatment is completed, the hydrogen enters the reaction kettle through the drying box and the flow controller, and the stirring paddle starts to work, and the reaction starts; under normal circumstances, the reaction kettle is controlled in temperature through the high liquid outlet pipeline, and when the temperature of the reaction kettle rises suddenly, the working power of the cooling liquid frequency conversion pump is increased, and the reaction kettle is cooled through the bottom liquid outlet pipeline. The molecular sieve outlet is connected with the lowest end of the inclined support plate, and the adsorption tower is provided with a vibrator on the outside, so that the molecular sieve can be quickly replaced.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This utility model's safe feeding system for a gas-liquid two-phase reactor utilizes an adsorption tower and a drying chamber to first remove carbon dioxide and carbon monoxide from the hydrogen, followed by water vapor removal via the drying chamber. This significantly improves the hydrogen impurity removal rate and enhances product quality. The coordinated use of a pressure regulating valve and a flow controller ensures more stable hydrogen feeding. The adsorption tower allows for faster molecular sieve replacement, improving production efficiency. The combined use of a coolant storage tank, a high-level outlet pipe, and a bottom outlet pipe allows for temperature control of the reactor under normal conditions via the high-level outlet pipe, and for cooling of the reactor during sudden temperature increases via the bottom outlet pipe, greatly improving the stability of the system's operation. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the safe feeding system for the gas-liquid two-phase reactor of this utility model;
[0018] Figure 2 This is a top view of the adsorption tower of this utility model.
[0019] In the diagram: 1. Adsorption tower; 2. Liquid preparation tank; 3. Drying oven; 4. Reactor; 5. Coolant storage tank; 6. Refrigeration unit; 7. Pressure regulating valve; 8. Flow controller; 9. Inclined support plate; 10. Isolation through-hole column; 11. Molecular sieve inlet; 12. Gas phase outlet; 13. Molecular sieve outlet; 14. Stirring paddle; 15. Feed pump; 16. Vacuum pump; 17. Feed pipe; 18. Coolant frequency conversion pump; 19. High-level liquid outlet pipe; 20. Bottom liquid outlet pipe; 21. Reactor temperature control jacket. Detailed Implementation
[0020] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0021] Example 1
[0022] like Figure 1 As shown, the reactor includes an adsorption tower 1 and a liquid preparation tank 2. The adsorption tower 1 is connected to a drying chamber 3, which is connected to a reaction vessel 4 via a flow controller 8. The adsorption tower 1 is connected to a pressure regulating valve 7 via a pipeline, and the pressure regulating valve 7 has a hydrogen inlet pipe. A reaction vessel temperature control sleeve 21 is installed on the outside of the reaction vessel 4. The liquid preparation tank 2 is connected to the reaction vessel 4 via a feed pump 15, and a feed pipe 17 is connected between the feed pump 15 and the reaction vessel 4, extending into the interior of the reaction vessel 4. Figure 2As shown, the inside of the adsorption tower 1 is provided with an inclined support plate 9, the inclined support plate 9 is provided with an isolation through-hole column 10, and the inclined support plate 9 is provided with a ventilation hole. The hydrogen in the pressure regulating valve 7 enters the lower part of the inclined support plate 9 through the pipeline, and then enters the isolation through-hole column 10 through the ventilation hole. The isolation through-hole column 10 is provided with adsorption materials such as molecular sieve between the isolation through-hole column 10 and the vertical wall of the adsorption tower 1. After the hydrogen passes through the adsorption materials, it is discharged from the adsorption tower through the gas phase outlet 12. The vertical wall of the adsorption tower 1 is provided with a molecular sieve outlet 13. The upper part of the adsorption tower 1 is provided with a molecular sieve inlet 11 and a gas phase outlet 12. The molecular sieve inlet 11 and the gas phase outlet 12 are located on both sides of the isolation through-hole column 10. The upper part of the isolation through-hole column 10 is in a sealed state. The molecular sieve outlet 13 is located above the inclined support plate 9. The inside of the reaction kettle 4 is provided with a stirring paddle 14. The reaction kettle 4 is connected with a vacuum pump 16. It also includes a refrigerator 6. The refrigerator 6 is connected with the inlet of the reaction kettle temperature control sleeve 21 through the cooling liquid storage tank 5. The outlet of the reaction kettle temperature control sleeve 21 is connected with the refrigerator 6 through the pipeline. The cooling liquid storage tank 5 and the reaction kettle temperature control sleeve 21 are provided with a cooling liquid frequency conversion pump 18. The bottom of the cooling liquid storage tank 5 is connected with the cooling liquid frequency conversion pump 18 through the bottom liquid outlet pipeline 20. The cooling liquid storage tank 5 and the cooling liquid frequency conversion pump 18 are also connected with a high-level liquid outlet pipeline 19. The connection between the high-level liquid outlet pipeline 19 and the cooling liquid storage tank 5 is located at the vertical wall 2 / 3.
[0023] The above-mentioned gas-liquid two-phase reaction kettle safety feeding system, when working, includes the following steps:
[0024] (1) Before the reaction starts, open the air blower and the vacuum pump to displace the gas in the reaction kettle 4. After displacement is completed, solvent and catalyst are fed through the liquid preparation tank 2; (2) Then, hydrogen enters the adsorption tower 1 through the pressure regulating valve 7 to adsorb the organic matter in it. After treatment is completed, it enters the reaction kettle 4 through the drying box 3 and the flow controller 8. The stirring paddle 14 starts to work, and the reaction starts; (3) Under normal circumstances, the reaction kettle 4 is temperature-controlled through the high-level liquid outlet pipeline 19. When the temperature of the reaction kettle 4 rises sharply, the working power of the cooling liquid frequency conversion pump 18 is increased to cool the reaction kettle 4 through the bottom liquid outlet pipeline 20.
Claims
1. A gas-liquid two-phase reactor safe feeding system, characterized in that, Including adsorption tower (1), liquid preparation tank (2), adsorption tower (1) is connected with drying box (3), drying box (3) is connected with reaction kettle (4) by flow controller (8), adsorption tower (1) is connected with pressure regulating valve (7) by pipeline, pressure regulating valve (7) is equipped with hydrogen inlet pipeline, the outside of reaction kettle (4) is equipped with reaction kettle temperature control cover (21), liquid preparation tank (2) is connected with reaction kettle (4) by feed pump (15), feed pump (15) is connected with feed pipeline (17) between reaction kettle (4), feed pipeline (17) extends into the inside of reaction kettle (4).
2. The gas-liquid two-phase reactor safe feeding system according to claim 1, characterized in that, The inside of the adsorption tower (1) is equipped with an inclined support plate (9), the inclined support plate (9) is equipped with a partitioning through-hole column (10), and the inclined support plate (9) is equipped with a ventilation hole.
3. The gas-liquid two-phase reactor safe feeding system according to claim 2, characterized in that, The vertical wall of the adsorption tower (1) is equipped with a molecular sieve outlet (13), the upper part of the adsorption tower (1) is equipped with a molecular sieve inlet (11) and a gas phase outlet (12), the molecular sieve inlet (11) and the gas phase outlet (12) are located on both sides of the partitioning through-hole column (10), the upper part of the partitioning through-hole column (10) is in a sealed state, and the molecular sieve outlet (13) is located above the inclined support plate (9).
4. The gas-liquid two-phase reactor safe feeding system according to claim 1, characterized in that, The inside of the reaction kettle (4) is equipped with a stirring paddle (14), and the reaction kettle (4) is connected with a vacuum pump (16).
5. The gas-liquid two-phase reactor safe feeding system according to claim 4, characterized in that, It also includes a refrigerator (6), which is connected with the inlet of the reaction kettle temperature control cover (21) through a cooling liquid storage tank (5), and the outlet of the reaction kettle temperature control cover (21) is connected with the refrigerator (6) through a pipeline.
6. The gas-liquid two-phase reactor safe feeding system according to claim 5, characterized in that, The cooling liquid storage tank (5) and the reaction kettle temperature control cover (21) are equipped with a cooling liquid frequency conversion pump (18), the bottom of the cooling liquid storage tank (5) is connected with the cooling liquid frequency conversion pump (18) through a bottom liquid outlet pipeline (20), and the cooling liquid storage tank (5) and the cooling liquid frequency conversion pump (18) are also connected with a high-level liquid outlet pipeline (19), and the connection between the high-level liquid outlet pipeline (19) and the cooling liquid storage tank (5) is located at 1 / 2-2 / 3 of the vertical wall.