Liquid sodium sulfonate drying device

Abstract

The utility model belongs to the technical field of p-methylphenol production, and relates to a liquid sodium sulfonate drying device which comprises a drying machine, a scraper assembly is arranged on one side of the drying machine, a machine base is arranged at the bottom of the drying machine, a housing is arranged on the outer wall of the drying machine, a roller and a charging tray are arranged in the housing, the charging tray is arranged below the roller, and two ends of the roller are connected with shaft sleeves. The outer side of the shaft sleeve is connected with rolling bearings, the outer end of the left rolling bearing is provided with a rotary joint, the roller steam inlet and the roller steam inlet are arranged on the rotary joint, the outer end of the right rolling bearing is provided with a bull gear, the bottom of the bull gear is meshed with a pinion, the outer sides of the bull gear and the pinion are provided with protective covers, and the pinion is connected to a speed reducer. In the drying process, sodium sulfate generated by the drying machine is discharged in time, the content of dried sodium sulfonate is increased, and the device has the advantages of being high in automation degree, drying efficiency and product purity.

Description

Technical Field

[0001] This utility model belongs to the field of p-methylphenol production technology, specifically relating to a liquid sodium sulfonate drying device. Background Technology

[0002] Currently, the domestic production process for p-cresol and phenol uses the toluene-sulfuric acid sulfonation-alkali fusion method. This involves reacting sulfuric acid with toluene to produce p-toluenesulfonic acid. The p-toluenesulfonic acid then undergoes an acid-base neutralization reaction with sodium sulfite produced during alkali fusion, generating a sodium p-toluenesulfonate solution. The sodium sulfonate then reacts with caustic soda flakes in an alkali fusion reactor to produce sodium p-cresolphenolate and sodium sulfite. The sodium p-cresolphenolate is then acidified with sulfur dioxide produced during neutralization to obtain crude phenol. This crude phenol is then processed through dehydration, continuous purification, crystallization, and distillation to obtain p-cresol.

[0003] When sodium p-toluenesulfonate reacts with alkali fusion, the moisture and salt content of the sodium sulfonate significantly affect the consumption of toluene and caustic soda flakes in p-methylphenol. Currently, the main methods for alkali fusion of sodium sulfonate and caustic soda flakes are as follows:

[0004] (1) Using liquid sodium sulfonate and caustic soda flakes for direct alkali fusion. This method requires a large amount of coal gas for evaporation during the alkali fusion process because the liquid sodium sulfonate has a high water content. This not only wastes energy, but also produces high-temperature water vapor containing a large amount of phenol, which puts great pressure on environmental protection.

[0005] (2) A rolling scraper is used to dry liquid sodium sulfonate, but due to the current limitations of the dryer, a large amount of sodium sulfate is generated during the drying process and cannot be removed, which causes the sodium sulfate in the sodium sulfonate to rise and affects the alkali fusion reaction.

[0006] Increasing the sodium sulfonate content and reducing its moisture content are persistent challenges in the para-cresol industry. Therefore, a liquid sodium sulfonate drying device has been proposed specifically for this unique material. Utility Model Content

[0007] The purpose of this invention is to provide a liquid sodium sulfonate drying device, which has the function of drying liquid sodium sulfonate and solves the problems in the background art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a liquid sodium sulfonate drying device, including a dryer. A scraper assembly is provided on one side of the dryer, and the outer wall of the dryer is set as a cover. A roller and a material tray are provided inside the cover. The material tray is located below the roller. The two ends of the roller are connected to bushings. Rolling bearings are connected to the outer side of the bushings. A rotary joint is provided at the outer end of the left rolling bearing, and a large gear is provided at the outer end of the right rolling bearing. A small gear meshes with the bottom of the large gear, and the small gear is connected to a reducer.

[0009] The dryer is equipped with a sodium sulfonate inlet at the front, a steam inlet for the material tray at the front bottom, a steam outlet for the material tray at the rear bottom, an exhaust outlet at the top, a drum steam inlet and a drum steam return outlet on one side, and a return outlet on one side of the bottom.

[0010] Preferably, the drum steam inlet and the drum steam inlet are located on the rotary joint.

[0011] Preferably, the bottom of the cover is provided with a viewing window, the middle of the cover is provided with an angle steel flange, and the top of the cover is provided with a handhole cover.

[0012] Preferably, the large gear and the small gear are provided with protective covers on their outer sides.

[0013] Preferably, the bottom of the dryer is equipped with a sodium sulfate screw conveyor connected to a sodium sulfate tank, and the sodium sulfate tank is equipped with a sodium sulfate inclined auger connected to a sodium sulfate tubular chain machine.

[0014] Preferably, the dryer is provided with an organic base at the bottom.

[0015] Preferably, the bottom outer wall of the cover is provided with heat-insulating angle steel.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] This invention discharges sodium sulfate produced by the dryer in a timely manner during the drying process, thereby increasing the sodium sulfonate content in the dried product. It has the advantages of high automation, high drying efficiency, and high product purity. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A formal structural diagram of a liquid sodium sulfonate drying device;

[0020] Figure 2 A partial structural side view of a liquid sodium sulfonate drying device;

[0021] In the above figures, 1. Sodium sulfate screw conveyor, 2. Rotary joint, 3. Rolling bearing, 4. Bushing, 5. Drum, 6. Handhole cover, 7. Viewing window, 8. Angle steel flange, 9. Large gear, 10. Protective cover, 11. Reducer, 12. Machine base, 13. Material tray, 14. Cover, 15. Scraper assembly, 16. Insulated angle steel, 17. Small gear, 18. Sodium sulfate inclined screw conveyor;

[0022] a. Sodium sulfonate inlet, b. Steam inlet of the material tray, c. Steam outlet of the material tray, d. Exhaust gas outlet, e. Steam inlet of the drum, f. Steam outlet of the drum, g. Return port. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Example 1, as Figure 1-2 As shown, a liquid sodium sulfonate drying device includes a dryer. A scraper assembly 15 is provided on one side of the dryer. The outer wall of the dryer is a cover 14. A roller 5 and a material tray 13 are provided inside the cover 14. The material tray 13 is located below the roller 5. The roller 5 is connected to bushings 4 at both ends. Rolling bearings 3 are connected to the outer side of the bushings 4. A rotary joint 2 is provided at the outer end of the left rolling bearing 3. A large gear 9 is provided at the outer end of the right rolling bearing 3. The bottom of the large gear 9 meshes with a small gear 17. The small gear 17 is connected to a reducer 11.

[0026] The dryer is equipped with a sodium sulfonate inlet a at the front, a steam inlet b at the bottom front, a steam outlet c at the bottom rear, an exhaust outlet d at the top, a drum steam inlet e and a drum steam outlet f on one side, and a return port g at the bottom side, which returns the incompletely dried sodium sulfonate slurry to storage for reprocessing.

[0027] Drum 5 serves as the primary drying medium, with high-temperature steam introduced inside. Heat conduction through the drum wall rapidly dehydrates the sodium sulfonate slurry. The rotational motion promotes material dispersion, increases the heat transfer area, and improves drying efficiency. Simultaneously, steam is introduced into tray 13 through steam inlet b to dry the remaining liquid sodium sulfonate.

[0028] The feed pan 13 is located below the drum 5. Liquid sodium sulfonate enters the dryer through the sodium sulfonate inlet a via a sodium sulfonate feed pump. The drum 5 is above the feed pan 13. When the liquid level in the feed pan 13 is high, the liquid sodium sulfonate solution is evenly distributed on the outer wall of the drum 5. As the liquid sodium sulfonate rotates with the drum 5 and the liquid level in the feed pan 13 is low, steam is introduced into the feed pan 13 for drying. The water vapor generated during drying is discharged through the exhaust outlet d. The solid sodium sulfonate produced during drying is scraped by the scraper assembly 15 to the sodium sulfonate screw conveyor, and then exits the dryer, peeling the dried sodium sulfonate layer off the drum 5.

[0029] The roller 5 is connected to the large gear 9, the small gear 17, and the reducer 11. The motor provides power and drives the reducer 11, the small gear 17, the large gear 9, and the roller 5 to roll.

[0030] The specific design of the aforementioned key components will be discussed in detail below:

[0031] The drum steam inlet e and the drum steam outlet e are located on the rotary joint 2. The drum 5 is connected to the rotary joint 2, which has a drum steam inlet e and a drum steam outlet f. Steam enters the inside of the drum 5 of the dryer along the drum steam inlet e. After heat exchange, the generated steam condensate is discharged through the drum steam outlet f.

[0032] The cover 14 has a viewing window 7 at its bottom, an angle steel flange 8 in its middle, and a handhole cover 6 at its top. The angle steel flange 8 is used to connect the handhole cover 6. The viewing window 7 is used to observe the drying status of the roller 5, and the handhole cover 6 provides an access point for maintenance. The high-temperature resistant glass viewing window 7 facilitates real-time monitoring, and the quick-opening handhole cover 6 simplifies the maintenance process.

[0033] A protective cover 10 is provided on the outside of the large gear 9 and the small gear 17. The protective cover 10 is used to protect the large gear 9 and the small gear 17 and prevent foreign objects from falling in.

[0034] The dryer is equipped with a sodium sulfate screw conveyor 1 at the bottom, which connects to a sodium sulfate tank. The sodium sulfate tank is equipped with a sodium sulfate inclined auger 18, which connects to a sodium sulfate tubular chain machine. During the drying process of liquid sodium sulfonate, as the concentration continuously increases, sodium sulfate continuously precipitates and accumulates at the bottom of the dryer. It is then output to the sodium sulfate tank by the sodium sulfate screw conveyor 1. The sodium sulfate tank is equipped with a sodium sulfate inclined auger 18, which transports the sodium sulfate produced by the dryer to the sodium sulfate tubular chain machine.

[0035] The dryer is provided with a base 12 at the bottom, which is used for support and load bearing.

[0036] The bottom outer wall of the cover 14 is provided with heat-insulating angle steel 16, and the inside of the heat-insulating angle steel is filled with heat-insulating material, such as aluminum silicate fiber or rock wool, to form a heat insulation layer to reduce the loss of heat inside the dryer to the external environment through the metal cover.

[0037] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A liquid sodium sulfonate drying apparatus, characterized in that, The dryer includes a scraper assembly on one side, a cover on the outer wall of the dryer, a roller and a material tray inside the cover, the material tray being located below the roller, bushings connecting both ends of the roller, rolling bearings connecting the outer sides of the bushings, a rotary joint being provided at the outer end of the left rolling bearing, a large gear being provided at the outer end of the right rolling bearing, a small gear meshing at the bottom of the large gear, and the small gear being connected to a reducer. The dryer is equipped with a sodium sulfonate inlet at the front, a steam inlet for the material tray at the front bottom, a steam outlet for the material tray at the rear bottom, an exhaust outlet at the top, a drum steam inlet and a drum steam outlet on one side, and a reflux port on one side of the bottom.

2. The liquid sodium sulfonate drying apparatus according to claim 1, characterized in that, The drum steam inlet and the drum steam inlet are located on the rotary joint.

3. The liquid sodium sulfonate drying apparatus according to claim 1, characterized in that, The bottom of the cover is provided with a viewing window, the middle of the cover is provided with an angle steel flange, and the top of the cover is provided with a handhole cover.

4. The liquid sodium sulfonate drying apparatus according to claim 1, characterized in that, The large gear and small gear are provided with protective covers on their outer sides.

5. The liquid sodium sulfonate drying apparatus according to claim 1, characterized in that, The dryer is equipped with a sodium sulfate screw conveyor at the bottom, which is connected to a sodium sulfate tank. The sodium sulfate tank is equipped with a sodium sulfate inclined auger, which is connected to a sodium sulfate tubular chain machine.

6. The liquid sodium sulfonate drying apparatus according to claim 1, characterized in that, The dryer is equipped with an organic base at its bottom.

7. The liquid sodium sulfonate drying apparatus according to claim 1, characterized in that, The bottom outer wall of the cover is provided with heat-insulating angle steel.

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