Sodium sulfonate drying condensate water treatment device and treatment method

Abstract

The present application relates to the field of chemical wastewater treatment, in particular to a sulfonic acid sodium drying condensate water treatment device and method. The sulfonic acid sodium drying condensate water treatment device comprises: a raw water tank for drying condensate water, p-methylphenol sodium, p-methylbenzenesulfonic acid sodium and sulfuric acid reaction to form p-methylphenol, p-methylbenzenesulfonic acid; resin adsorption tower, adsorbing p-methylphenol and p-methylbenzenesulfonic acid to form clear liquid; water tank, storing clear liquid; desorption agent tank, delivering desorption agent to the resin adsorption tower, the desorption agent is configured to react with p-methylphenol, p-methylbenzenesulfonic acid to form p-methylphenol sodium, p-methylsulfonic acid sodium; concentrated liquid tank, acidifying p-methylphenol sodium, p-methylsulfonic acid sodium to recover crude phenol and sulfonic acid sodium. The sulfonic acid sodium drying condensate water treatment device has low processing cost and does not affect the quality of p-cresol, and can recover phenol and sulfonic acid sodium in the drying condensate water, reducing resource waste.

Description

Technical Field

[0001] This invention relates to the field of chemical wastewater treatment, specifically to a sodium sulfonate drying condensate treatment device and method. Background Technology

[0002] In the production process of p-cresol and phenol, toluene and sulfuric acid are used as raw materials. A sulfonation reaction produces p-toluenesulfonic acid. The p-toluenesulfonic acid undergoes an acid-base neutralization reaction with sodium sulfite produced by alkali fusion to generate a sodium p-toluenesulfonate solution. This solution is then dried in a drum dryer to solidify the sodium sulfonate, with the steam condensed. The solid sodium sulfonate reacts with caustic soda flakes in an alkali fusion kettle to produce sodium p-cresolphenolate and sodium sulfite. The sodium p-cresolphenolate undergoes an acidification reaction with sulfur dioxide produced during neutralization to obtain crude phenol. This crude phenol is then produced through dehydration, purification, crystallization, and distillation to obtain p-toluene. Because the solid sodium sulfite used for neutralization contains a large amount of sodium phenolate, this sodium phenolate exists as phenol during the neutralization and drying process. This results in the condensate containing a large amount of phenol and sodium sulfonate, with a COD of approximately 9000-30000 mg / m³. 3 One step is difficult to handle biochemically.

[0003] Currently, the main methods for treating this high-concentration phenol and sodium sulfonate-containing drying condensate include extraction, chemical oxidation or catalytic oxidation, and biochemical methods. Extraction is the most common method, but because the extractant remains in the crude phenol during the back-extraction process, it severely affects the quality indicators such as color and content of p-cresol during subsequent purification, and is now rarely used in the p-cresol industry. The second most common method is chemical oxidation, which requires a large amount of oxidant and cannot effectively recover phenol, resulting in high operating costs. The third method is biochemical treatment, which involves diluting with water and then performing biochemical treatment, but this method involves large wastewater volumes and high operating costs.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problem of high cost in the treatment of phenol- and sodium sulfonate-containing drying condensate in existing technologies, this invention provides a sodium sulfonate drying condensate treatment device. The sodium sulfonate drying condensate treatment device includes: a raw water tank containing dried condensate and sulfuric acid, for reacting sodium p-methylphenolate and sodium p-methylbenzenesulfonate in the dried condensate with the sulfuric acid to form p-methylphenol and p-methylbenzenesulfonic acid; a resin adsorption tower adsorbing the p-methylphenolate and p-methylbenzenesulfonic acid to form a clear liquid; an outlet tank storing the clear liquid; a desorbent tank supplying a desorbent to the resin adsorption tower, the desorbent being configured to react with the p-methylphenolate and p-methylbenzenesulfonic acid to form sodium p-methylphenolate and sodium p-methylbenzenesulfonate; and a concentrate tank acidifying the sodium p-methylphenolate and sodium p-methylbenzenesulfonate to recover crude phenol and sodium sulfonate.

[0006] The sodium sulfonate drying condensate treatment device of the present invention includes a raw water tank, a resin adsorption tower, an outlet tank, a desorption tank, and a concentrate tank. The raw water tank is used to contain drying condensate and sulfuric acid. Sodium p-methylphenol and sodium p-methylbenzenesulfonate in the drying condensate react with the sulfuric acid to form p-methylphenol and p-methylbenzenesulfonic acid. Then, it enters the resin adsorption tower for adsorption. Utilizing the unique channels between the polymer resins, p-methylphenol and p-methylbenzenesulfonic acid are intercepted in the resin. The clear liquid after adsorption is transported to the outlet tank for biochemical treatment. Subsequently, the adsorbed resin is desorbed. The desorbent reacts with p-methylphenol and p-methylbenzenesulfonic acid to form sodium p-methylphenol and sodium p-methylsulfonate. Finally, the formed sodium p-methylphenol and sodium p-methylsulfonate are transported to the concentrate tank for acidification to recover crude phenol and sodium sulfonate. In the treatment process of dried condensate, no large amount of oxidant is required for oxidation, nor is a large amount of water needed for dilution, resulting in low treatment costs. Simultaneously, the polymer resin does not chemically react with p-cresol or p-toluenesulfonic acid, thus having no impact on the quality of p-cresol. Through the above-described configuration, the sodium sulfonate dried condensate treatment device of this invention has low processing costs, does not affect the quality of p-cresol, and can recover phenol and sodium sulfonate from the dried condensate, reducing resource waste.

[0007] In the preferred embodiment of the sodium sulfonate drying condensate treatment device described above, the resin adsorption tower is connected to a water washing tank, which is configured to flush clean water into the resin adsorption tower to clean the resin inside. Through this configuration, the washed resin can effectively remove residual substances, ensuring the purity and quality of the resin; simultaneously, the washing process also helps to recover residual products within the resin adsorption tower, improving resource utilization.

[0008] In the preferred embodiment of the above-mentioned sodium sulfonate drying condensate treatment device, the resin adsorption tower is connected to a waste liquid storage tank. The waste liquid storage tank is configured to store the clean water used to clean the resin in the resin adsorption tower, and the waste liquid storage tank is connected to the raw water tank. Through this configuration, the clean water generated during the washing process can be transported to the raw water tank to adjust the pH value, facilitating the reaction between sulfuric acid and sodium p-methylphenolate and sodium p-methylbenzenesulfonate, thus reducing the amount of sulfuric acid used.

[0009] In the preferred embodiment of the above-mentioned sodium sulfonate drying condensate treatment device, the resin adsorption tower is connected to an acid washing tank, which is configured to flush sulfuric acid into the resin adsorption tower. Through this arrangement, the resin in the resin adsorption tower is acidified with sulfuric acid after washing, which improves the adsorption effect of the resin and facilitates the next adsorption cycle of the resin adsorption tower.

[0010] In a preferred embodiment of the above-described sodium sulfonate drying condensate treatment apparatus, a heat exchanger is provided between the desorbent tank and the resin adsorption tower. The heat exchanger is configured to heat the desorbent to 30°C-60°C. This configuration, by heating the desorbent before it is injected into the resin adsorption tower, improves the adsorption efficiency of the adsorbent.

[0011] In the preferred embodiment of the sodium sulfonate drying condensate treatment device described above, an online chemical oxygen demand (COD) analyzer is installed on the outlet tank, and a backup adsorption tower is connected between the outlet tank and the raw water tank. Through this arrangement, the online COD analyzer can automatically adjust the adsorption and desorption times based on the detection results, reducing manual intervention; simultaneously, the backup adsorption tower ensures adsorption stability and improves the treatment efficiency of the dried condensate.

[0012] To address the aforementioned technical problems, this invention also discloses a method for treating sodium sulfonate drying condensate. This method includes: controlling a raw water tank to contain dried condensate and sulfuric acid, and allowing sodium p-methylphenolate, sodium p-methylbenzenesulfonate, and sulfuric acid in the dried condensate to react and form p-methylphenol and p-methylbenzenesulfonic acid; controlling a resin adsorption tower to adsorb the p-methylphenol and p-methylbenzenesulfonic acid to form a clear liquid; controlling a water storage tank to store the clear liquid; controlling a desorbent tank to supply a desorbent to the resin adsorption tower, the desorbent being configured to react with the p-methylphenol and p-methylbenzenesulfonic acid to form sodium p-methylphenolate and sodium p-methylbenzenesulfonate; and controlling a concentrate tank to acidify the sodium p-methylphenolate and sodium p-methylbenzenesulfonate to recover crude phenol and sodium sulfonate. With the above setup, the treatment of dried condensate does not require a large amount of oxidant or a large amount of water for dilution, resulting in lower treatment costs. At the same time, the polymer resin does not react chemically with p-methylphenol or p-methylbenzenesulfonic acid, and has no impact on the quality of p-cresol, thus reducing resource waste.

[0013] In the preferred embodiment of the above-mentioned method for treating sodium sulfonate drying condensate, the step of controlling the delivery of desorbent from the desorbent tank to the resin adsorption tower includes: controlling the desorbent tank to deliver the desorbent to the heat exchanger; controlling the heat exchanger to heat the desorbent to 30℃-60℃; and delivering the heated desorbent to the resin adsorption tower. Through the above arrangement, the desorbent is heated before being injected into the resin adsorption tower, which improves the adsorption efficiency of the adsorbent.

[0014] In the preferred embodiment of the above-mentioned method for treating the condensate from the drying of sodium sulfonate, after the heated desorbent is conveyed to the resin adsorption tower, the method further includes controlling a water washing tank to flush clean water into the resin adsorption tower to clean the resin inside the tower. Through this setup, the washed resin can effectively remove residual substances, ensuring the purity and quality of the resin; simultaneously, the washing process also helps to recover residual products within the resin adsorption tower, improving resource utilization.

[0015] In the preferred embodiment of the above-mentioned method for treating the condensate from the drying of sodium sulfonate, the step of controlling the water washing tank to flush clean water into the resin adsorption tower to clean the resin in the resin adsorption tower includes: controlling the water washing tank to flush clean water into the resin adsorption tower; conveying the clean water used to clean the resin in the resin adsorption tower to a waste liquid storage tank; and conveying the clean water in the waste liquid storage tank to the raw water tank. Through the above setup, the clean water during the washing process can be conveyed to the raw water tank to adjust the pH value in the raw water tank, facilitating the reaction of sulfuric acid with sodium p-methylphenol and sodium p-methylbenzenesulfonate, and reducing the amount of sulfuric acid used. Attached Figure Description

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a schematic diagram of an embodiment of the sodium sulfonate drying and condensate treatment device of the present invention.

[0018] Figure 2 This is a flowchart of the sodium sulfonate drying and condensate treatment method of the present invention.

[0019] Figure 3 This is a flowchart of step S4 in the sodium sulfonate drying and condensate treatment method of the present invention.

[0020] Figure 4 This is a flowchart of step S6 in the sodium sulfonate drying and condensate treatment method of the present invention.

[0021] List of reference numerals in the attached diagram: 1. Raw water tank; 2. Resin adsorption tower; 3. Outlet water tank; 4. Desorbent tank; 5. Heat exchanger; 6. Washing tank; 7. Acid washing tank; 8. Waste liquid storage tank; 9. Concentrated liquid tank; 10. Acidifier. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] To improve or solve the technical problem of high cost in the treatment of phenol- and sodium sulfonate-containing drying condensate in existing technologies, this invention provides a sodium sulfonate drying condensate treatment device. This device includes: a raw water tank 1, which contains drying condensate and sulfuric acid, and allows sodium p-methylphenolate and sodium p-methylbenzenesulfonate in the drying condensate to react with sulfuric acid to form p-methylphenol and p-methylbenzenesulfonic acid; a resin adsorption tower 2, which adsorbs p-methylphenol and p-methylbenzenesulfonic acid to form a clear liquid; an outlet tank 3, which stores the clear liquid; a desorbent tank 4, which supplies desorbent to the resin adsorption tower 2, the desorbent being formulated to react with p-methylphenol and p-methylbenzenesulfonic acid to form sodium p-methylphenolate and sodium p-methylbenzenesulfonate; and a concentrate tank 9, which acidifies the sodium p-methylphenolate and sodium p-methylbenzenesulfonate to recover crude phenol and sodium sulfonate.

[0026] Figure 1 This is a schematic diagram of an embodiment of the sodium sulfonate drying and condensate treatment device of the present invention. Figure 1 As shown, in one or more embodiments, the sodium sulfonate drying condensate treatment device of the present invention includes a raw water tank 1, a resin adsorption tower 2, an outlet water tank 3, an adsorbent tank and a concentrated liquid tank 9.

[0027] See also Figure 1 Raw water tank 1 is used to contain dried condensate and sulfuric acid, and to allow sodium p-methylphenol and sodium p-toluenesulfonate in the dried condensate to react with sulfuric acid to form p-methylphenol and p-toluenesulfonic acid. Specifically, raw water tank 1 is connected to a raw water pipeline and a sulfuric acid delivery pipeline. The raw water pipeline is used to deliver dried condensate containing phenol and sodium sulfonate into raw water tank 1. The COD (Chemical Oxygen Demand) in the dried condensate is 9000-30000 mg / m³. 3 Furthermore, a pH meter is installed on the raw water tank 1 to detect the pH value within the tank. Preferably, the pH in the raw water tank 1 is 2-6 to facilitate the reaction of sulfuric acid with sodium p-methylphenol and sodium p-toluenesulfonate. Further, a mixer is installed inside the raw water tank 1 to ensure sufficient reaction between the sulfuric acid and sodium p-methylphenol and sodium p-toluenesulfonate. Exemplarily, the mixer can be a stirring structure driven by a motor. Further, an acid regulating valve is installed on the raw water tank 1 to adjust the pH value within the tank. Preferably, the acid regulating valve is a solenoid valve and is connected to the pH meter. When the pH meter reading is lower than a preset value, the acid regulating valve opens, adding acid to the raw water tank 1.

[0028] See also Figure 1The resin adsorption tower 2 is connected to the raw water tank 1 and is used to adsorb p-methylphenol and p-toluenesulfonic acid. The dried condensate after adsorption forms a clear liquid. Specifically, the resin adsorption tower 2 is filled with a porous polymer resin. When the dried condensate comes into contact with the polymer resin, various components in the dried condensate diffuse to the outer surface and the inner surface of the micropores of the polymer resin and are adsorbed onto the resin through van der Waals forces or other intermolecular forces. Furthermore, two resin adsorption towers 2 are provided, one of which is connected to the raw water tank 1, and the other is a backup. Pneumatic shut-off valves are installed on both resin adsorption towers 2 to disconnect the connection between the resin adsorption tower 2 and the raw water tank 1. Furthermore, a compressed air purging device is arranged inside the resin adsorption tower 2 to purge the liquid inside the resin adsorption tower 2. Preferably, the sulfuric acid is a dilute acid with a concentration of 1%-10%.

[0029] See also Figure 1 The effluent tank 3 is connected to the resin adsorption tower 2 and is used to store the clarified liquid. Specifically, the COD of the clarified liquid in the resin adsorption tower 2 is reduced to 1000 mg / m³. 3 Within this range, the sterilization effect of the water is significantly reduced, which is more conducive to the next step of biochemical treatment. Furthermore, an online chemical oxygen demand (COD) monitor is installed inside the effluent tank 3. The COD monitor is used to detect the COD of the clarified liquid inside the effluent tank 3. Preferably, the COD monitor is set with a predetermined value, which can be set to 200-1500 mg / m³. 3 Furthermore, the pneumatic shut-off valve of resin adsorption tower 2 is linked to the online chemical oxygen demand (COD) analyzer. When the COD analyzer reaches a predetermined value, the pneumatic shut-off valve of resin adsorption tower 2 closes, and the pneumatic shut-off valve of the standby adsorption tower opens, switching the connection between the raw water pipe and resin adsorption tower 2 to the standby adsorption tower. At this time, the compressed air purging device inside resin adsorption tower 2 activates, compressing the clarified liquid into the outlet tank 3. Alternatively, the pneumatic shut-off valve can be a three-way valve, connecting the raw water tank 1, resin adsorption tower 2, and standby adsorption tower via a single pneumatic shut-off valve. The online COD analyzer is linked to the pneumatic shut-off valve, automatically adjusting the adsorption and desorption times based on the detection results. This high degree of automation eliminates the need for manual control and is unrestricted in treating dried condensate with large fluctuations in phenol and sodium sulfonate concentrations.

[0030] See also Figure 1The desorbent tank 4 is connected to the resin adsorption tower 2 and is used to supply the desorbent into the resin adsorption tower 2. The desorbent reacts with p-methylphenol and p-toluenesulfonic acid to form sodium p-methylphenolate and sodium p-methanesulfonate, thereby separating them from the resin. Specifically, the desorbent is a 1%-10% sodium hydroxide solution. In one or more embodiments, the concentrate tank 9 is connected to the resin adsorption tower 2 and is used to acidify the sodium p-methylphenolate and sodium p-methanesulfonate. Specifically, after the desorbent enters the adsorption tower, it is soaked for a period of time to react. Subsequently, the compressed air purging device in the resin adsorption tower 2 is activated to compress the solution in the resin adsorption tower 2 into the concentrate tank 9. The concentrate tank 9 is connected to an acidifier 10, and the solution in the concentrate tank 9 is acidified in the acidifier 10 to recover the crude phenol and sodium sulfonate. Furthermore, a heat exchanger 5 is provided between the desorbent tank 4 and the resin adsorption tower 2. The heat exchanger 5 is used to heat the temperature of the desorbent to 30°C-60°C. Preferably, the heat exchanger 5 is a shell-and-tube heat exchanger 5.

[0031] See also Figure 1 In one or more embodiments, the resin adsorption tank is connected to a water washing tank 6, which is used to flush clean water into the resin adsorption tower 2 to clean the resin inside the tower. The clean water after washing is acidic. Further, the water washing tank 6 is connected to a heat exchanger 5, and the clean water in the water washing tank 6 first flows into the heat exchanger 5 and then into the resin adsorption tank. Further, the resin adsorption tower 2 is connected to a waste liquid storage tank 8, which is used to store the clean water used to clean the resin and is connected to the raw water tank 1. Sulfuric acid or the clean water in the waste liquid storage tank 8 can be used to adjust the pH value in the raw water tank 1. Further, the resin adsorption tower 2 is also connected to an acid washing tank 7, which is used to flush sulfuric acid into the resin adsorption tower 2. Specifically, the sulfuric acid can be a dilute acid with a concentration of 1%-10%. Acidifying the washed resin with sulfuric acid can improve the adsorption effect, preparing it for the next adsorption cycle. Furthermore, the pickling tank 7 is connected to the heat exchanger 5. The sulfuric acid in the pickling tank 7 is first transported to the heat exchanger 5 and then flows to the resin adsorption tank.

[0032] In order to improve or solve the technical problem of high cost in the treatment of condensate containing phenol and sodium sulfonate in the prior art, the present invention provides a method for treating condensate containing sodium sulfonate.

[0033] Figure 2 This is a flowchart of the sodium sulfonate drying and condensate treatment method of the present invention. Figure 2 As shown, the method for treating sodium sulfonate drying condensate includes:

[0034] Step S1: Control the raw water tank 1 to contain dry condensate and sulfuric acid, and allow the sodium p-methylphenol, sodium p-methylbenzenesulfonate in the dry condensate to react with sulfuric acid to form p-methylphenol and p-methylbenzenesulfonic acid;

[0035] Step S2: Control the adsorption of p-methylphenol and p-methylbenzenesulfonic acid in resin adsorption tower 2 to form a clear liquid;

[0036] Step S3: Control the storage tank to store the clear liquid;

[0037] Step S4: Control the desorbent tank 4 to deliver the desorbent into the resin adsorption tower 2. The desorbent is prepared to react with p-methylphenol and p-methylbenzenesulfonic acid to form sodium p-methylphenolate and sodium p-methylsulfonate.

[0038] Step S5: Control the concentrated liquid tank 9 to acidify sodium p-methylphenol and sodium p-methanesulfonate in order to recover crude phenol and sodium sulfonate.

[0039] Specifically, in step S1, the sulfuric acid is a dilute acid with a concentration of 1%-10%. The pH value in the raw water tank 1 is controlled between 2 and 6. Further, in steps S2 and S3, two resin adsorption towers 2 are provided, one connected to the raw water tank 1 and the other as a backup. An online chemical oxygen demand (COD) monitor is installed in the outlet tank 3. The COD monitor is used to detect the COD of the clarified liquid in the outlet tank 3. Preferably, the COD monitor has a predetermined value, which can be set to 200-1500 mg / m³. Further, the pneumatic shut-off valve of the resin adsorption tower 2 is linked to the COD monitor. When the COD reading reaches the predetermined value, the pneumatic shut-off valve of the resin adsorption tower 2 closes, the pneumatic shut-off valve of the backup adsorption tower opens, and the raw water pipe switches from being connected to the resin adsorption tower 2 to being connected to the backup adsorption tower; at this time, the compressed air purging device in the resin adsorption tower 2 activates, compressing the clarified liquid into the outlet tank 3. Alternatively, a three-way valve can be used as the pneumatic shut-off valve, connecting the raw water tank 1, resin adsorption tower 2, and standby adsorption tower. The online chemical oxygen demand (COD) analyzer is linked to the pneumatic shut-off valve, automatically adjusting the adsorption and desorption times based on the detection results. This provides a high degree of automation, requires no manual control, and is unrestricted in handling dried condensate with large fluctuations in phenol and sodium sulfonate concentrations. Furthermore, in steps S3 and S4, a compressed air purging device is installed inside the resin adsorption tower 2. This device compresses the clarified liquid into the outlet tank 3 and the solution within the resin adsorption tower 2 into the concentrate tank 9. Further, in step S4, the desorbent is a 1%-10% sodium hydroxide solution.

[0040] Figure 3 This is a flowchart of step S4 in the sodium sulfonate drying and condensate treatment method of the present invention. For example... Figure 3 As shown, in one or more embodiments, step S4 controls the desorbent tank 4 to deliver desorbent into the resin adsorption tower 2, including:

[0041] Step S41: Control the desorbent tank 4 to deliver desorbent to the heat exchanger 5;

[0042] Step S42: Control the heat exchanger 5 to heat the desorbent to 30℃-60℃;

[0043] Step S43: The heated desorbent is transported to the resin adsorption tower 2.

[0044] Figure 4 This is a flowchart of step S6 in the sodium sulfonate drying and condensate treatment method of the present invention. For example... Figure 2 and Figure 4 As shown, in one or more embodiments, after step S5, step S6 is further included: controlling the water washing tank 6 to flush clean water into the resin adsorption tower 2 to clean the resin in the resin adsorption tower 2.

[0045] Specifically, step S6 includes:

[0046] Step S61: Control the water washing tank 6 to flush clean water into the resin adsorption tower 2;

[0047] Step S62: The clean water used to clean the resin in the resin adsorption tower 2 is transferred to the waste liquid storage tank 8.

[0048] Step S63: Transfer the clean water in the waste liquid storage tank 8 to the raw water tank 1.

[0049] See also Figure 4 In one or more embodiments, step S7 is included after step S6, controlling the acid washing tower to flush sulfuric acid into the resin adsorption tower 2. Furthermore, both the water washing tank 6 and the acid washing tank 7 are connected to the heat exchanger 5, and the desorbent, water, and sulfuric acid are preheated before being transported into the resin adsorption tower 2.

[0050] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A sodium sulfonate drying and condensate treatment device, characterized in that, include: Raw water tank (1) contains dry condensate and sulfuric acid, and provides sodium p-methylphenol and sodium p-methylbenzenesulfonate in the dry condensate to react with the sulfuric acid to form p-methylphenol and p-methylbenzenesulfonic acid; The resin adsorption tower (2) adsorbs the p-methylphenol and the p-methylbenzenesulfonic acid to form a clear liquid; The water outlet tank (3) stores the clarified liquid; Desorbent tank (4) delivers desorbent into the resin adsorption tower (2), the desorbent being configured to react with p-methylphenol and p-methylbenzenesulfonic acid to form sodium p-methylphenolate and sodium p-methylsulfonate; Concentrated liquid tank (9) is used to acidify the sodium p-methylphenol and the sodium p-methanesulfonate to recover crude phenol and sodium sulfonate; The resin adsorption tower (2) is connected to a water washing tank (6), which is configured to flush clean water into the resin adsorption tower (2) to clean the resin inside the resin adsorption tower (2). The resin adsorption tower (2) is connected to a waste liquid storage tank (8), which is configured to store clean water for cleaning the resin in the resin adsorption tower (2), and the waste liquid storage tank (8) is connected to the raw water tank (1). An online chemical oxygen demand (COD) detector is installed on the outlet tank (3), and a backup adsorption tower is connected between the outlet tank (3) and the raw water tank (1).

2. The sodium sulfonate drying and condensate treatment device according to claim 1, characterized in that, The resin adsorption tower (2) is connected to an acid washing tank (7), which is configured to flush sulfuric acid into the resin adsorption tower (2).

3. The sodium sulfonate drying and condensate treatment apparatus according to claim 1, characterized in that, A heat exchanger (5) is provided between the desorbent tank (4) and the resin adsorption tower (2), and the heat exchanger (5) is configured to heat the temperature of the desorbent to 30°C-60°C.

4. A method for treating condensate from sodium sulfonate drying, characterized in that, include: The raw water tank (1) contains dry condensate and sulfuric acid, and the sodium p-methylphenol and sodium p-methylbenzenesulfonate in the dry condensate react with the sulfuric acid to form p-methylphenol and p-methylbenzenesulfonic acid; The resin adsorption tower (2) is controlled to adsorb the p-methylphenol and the p-methylbenzenesulfonic acid to form a clear liquid; Control the storage tank to store the clarified liquid; The desorbent tank (4) is controlled to deliver the desorbent into the resin adsorption tower (2), the desorbent being configured to react with the p-methylphenol and the p-methylbenzenesulfonic acid to form sodium p-methylphenolate and sodium p-methylsulfonate; The concentrated liquid tank (9) is used to acidify the sodium p-methylphenol and the sodium p-methanesulfonate to recover crude phenol and sodium sulfonate; After the heated desorbent is delivered to the resin adsorption tower (2), the process also includes controlling the water washing tank (6) to flush clean water into the resin adsorption tower (2) to clean the resin inside the resin adsorption tower (2). The step of the controlled water washing tank (6) flushing clean water into the resin adsorption tower (2) to clean the resin in the resin adsorption tower (2) includes: Control the water washing tank (6) to flush clean water into the resin adsorption tower (2); The clean water used to clean the resin in the resin adsorption tower (2) is transported to the waste liquid storage tank (8). The clean water in the waste liquid storage tank (8) is transported to the raw water tank (1).

5. The method for treating sodium sulfonate drying condensate according to claim 4, characterized in that, The step of controlling the desorbent tank (4) to deliver the desorbent into the resin adsorption tower (2) includes: controlling the desorbent tank (4) to deliver the desorbent to the heat exchanger (5); controlling the heat exchanger (5) to heat the temperature of the desorbent to 30℃-60℃; and delivering the heated desorbent to the resin adsorption tower (2).

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