Saturated activated carbon hydrothermal alkali regeneration apparatus and regeneration method

Abstract

This invention discloses a hydrothermal alkali regeneration device and method for saturated activated carbon, relating to the field of activated carbon regeneration technology. The hydrothermal alkali regeneration device for saturated activated carbon includes a regeneration reactor. The regeneration reactor includes a reactor body, a filter screen, and a heating device. The reactor body has a receiving cavity for containing regeneration alkali solution. The filter screen is disposed within the receiving cavity, dividing it into a heating cavity and a regeneration cavity. The filter screen prevents granular activated carbon from entering the heating cavity. The heating device is disposed within the heating cavity and is used to heat the regeneration alkali solution within the receiving cavity. This design helps prevent the activated carbon from directly contacting the high-temperature heating device during regeneration, and helps avoid damage to the activated carbon due to high temperatures, thus reducing the adsorption performance of the regenerated activated carbon.

Description

Technical Field

[0001] This invention relates to the field of activated carbon regeneration technology, and more specifically, to a hydrothermal alkaline regeneration device and method for saturated activated carbon. Background Technology

[0002] Activated carbon is one of the most effective methods for removing fluoride from water. However, with granular activated carbon, once the removal rate of perfluoroalkyl and polyfluoroalkyl substances (PFAS) reaches a certain level, the removal rate of PFAS decreases rapidly, necessitating replacement after a period of time. Activated carbon is relatively expensive, and frequent replacement increases costs. Therefore, activated carbon regeneration technology is needed to restore its adsorption performance.

[0003] Currently, high-temperature pyrolysis is commonly used to regenerate granular activated carbon adsorbed with PFAS, which typically achieves a high degradation rate of PFAS. However, this process requires very high temperatures, meaning high energy consumption, and places high demands on the equipment's high-temperature and high-pressure resistance. Furthermore, high-temperature pyrolysis regeneration results in significant activated carbon loss, reducing the specific surface area of ​​the granular activated carbon and potentially damaging its micropores, leading to a decrease in the adsorption performance of the regenerated activated carbon. In addition, high-temperature pyrolysis regeneration of granular activated carbon also generates fluorine-containing waste gas. Summary of the Invention

[0004] This invention discloses a hydrothermal alkali regeneration device and method for saturated activated carbon, in order to solve the technical problem that the adsorption capacity of activated carbon decreases significantly after regeneration in the prior art.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] This application provides a hydrothermal alkali regeneration device for saturated activated carbon. The device includes a regeneration reactor. The reactor includes a reactor body, a filter screen, and a heating device. The reactor body has a receiving cavity for containing regenerated alkali solution. The filter screen is disposed within the receiving cavity, dividing it into a heating cavity and a regeneration cavity. The filter screen prevents granular activated carbon from entering the heating cavity. The heating device is disposed within the heating cavity and is used to heat the regenerated alkali solution within the receiving cavity.

[0007] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes an alkali preparation tank and a first heat exchanger. The alkali preparation tank is connected to the receiving cavity. The alkali preparation tank is used to prepare the regenerated alkali solution and supply it to the receiving cavity. The first heat exchanger is located in the alkali preparation tank. The first heat exchanger is connected to the top of the receiving cavity. Steam in the receiving cavity can enter the first heat exchanger and heat the regenerated alkali solution in the alkali preparation tank.

[0008] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a saturated activated carbon container and a second heat exchanger. The saturated activated carbon container holds the saturated activated carbon to be regenerated. The second heat exchanger is located inside the saturated activated carbon container.

[0009] In some schemes, the second heat exchanger is connected to the first heat exchanger, and the fluid passing through the first heat exchanger can enter the second heat exchanger and heat the saturated activated carbon in the saturated activated carbon container.

[0010] In some designs, the second heat exchanger is connected to the top of the containment chamber, allowing steam in the containment chamber to enter the second heat exchanger and heat the saturated activated carbon in the saturated activated carbon container.

[0011] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes an alkali recovery tank. The alkali recovery tank is connected to the bottom of the receiving cavity and is used to store the regenerated alkali solution discharged from the reactor.

[0012] In some designs, the alkali recovery tank is connected to the first heat exchanger, and the fluid passing through the first heat exchanger can enter the alkali recovery tank.

[0013] In some designs, the alkali recovery tank is connected to a second heat exchanger, and the fluid passing through the second heat exchanger can enter the alkali recovery tank.

[0014] In some designs, the regeneration reactor also includes a cleaning device and a regeneration alkali pump. The cleaning device is located within the containment chamber. The bottom of the alkali recovery tank and / or containment chamber is connected to the inlet of the regeneration alkali pump, and the outlet of the regeneration alkali pump is connected to the cleaning device.

[0015] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a first filter box. The first filter box is connected to the reactor body, and the activated carbon in the reactor body can enter the first filter box from the regeneration chamber. The first filter box is connected to the alkali recovery tank, and the regenerated alkali solution separated by the first filter box can enter the alkali recovery tank.

[0016] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a second filter tank, a neutralization and cleaning tank, and a circulation pump. The neutralization and cleaning tank is connected to the reactor body, and the regenerated alkali solution and / or powdered activated carbon in the reactor body can enter the neutralization and cleaning tank. The bottom of the neutralization and cleaning tank is connected to the inlet of the circulation pump. The outlet of the circulation pump is connected to the second filter tank. The second filter tank is connected to the neutralization and cleaning tank, and the liquid separated by the second filter tank can enter the neutralization and cleaning tank.

[0017] In some designs, a neutralization cleaning solution pipeline is installed inside the second filter box, which is used to add neutralizing liquid and / or cleaning liquid into the second filter box.

[0018] In some designs, the neutralization and cleaning tank has a first supernatant pipeline connected to the alkali preparation tank, and the supernatant in the neutralization and cleaning tank can enter the alkali preparation tank along the first supernatant pipeline.

[0019] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a waste cleaning liquid tank. The neutralization cleaning tank has a second supernatant pipeline. The second supernatant pipeline is connected to the waste cleaning liquid tank, and the supernatant in the neutralization cleaning tank can enter the waste cleaning liquid tank along the second supernatant pipeline.

[0020] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a waste neutralization liquid tank. The neutralization cleaning tank has a third supernatant pipeline. The third supernatant pipeline is connected to the waste neutralization liquid tank, and the supernatant in the neutralization cleaning tank can enter the waste neutralization liquid tank through the third supernatant pipeline.

[0021] In some designs, the heating device is an electric heating rod;

[0022] In some designs, the regeneration reactor also includes multiple layers of baffles. These baffles are spaced vertically within the heating chamber. Along the direction from the heating chamber to the receiving chamber, the baffles are inclined upwards.

[0023] In some designs, the filter screen has a cylindrical structure. The filter screen is coaxially arranged with the vessel body, and a heating chamber surrounding the regeneration chamber is formed between the filter screen and the vessel body.

[0024] In some designs, the heating device is an electric heating rod, and the side wall of the vessel body has multiple mounting holes for installing the heating device. The mounting holes are spaced apart along the vertical direction of the vessel body, and the mounting holes penetrate the side wall of the vessel body and communicate with the heating chamber. The heating device extends into the heating chamber through the mounting holes and is sealed to the vessel body.

[0025] In some designs, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a temperature sensor, a pressure sensor, a pressure regulating valve, and a controller. The temperature sensor detects the temperature within the containment chamber. The pressure sensor detects the pressure within the containment chamber. The controller is connected to the temperature sensor, pressure sensor, pressure regulating valve, and heating device. The controller acquires the temperature information detected by the temperature sensor and the pressure information detected by the pressure sensor. Based on the temperature information, the controller adjusts the power of the heating device, and based on the pressure information, it controls the opening and closing of the pressure regulating valve.

[0026] The technical solution adopted in this invention can achieve the following beneficial effects:

[0027] The hydrothermal alkali regeneration equipment for saturated activated carbon provided in this application offers a regeneration reactor for saturated activated carbon, which facilitates the control of temperature and pressure during the regeneration process. A filter screen divides the containment chamber into a heating chamber and a regeneration chamber, preventing activated carbon particles of a predetermined size from entering the heating chamber. This, in turn, prevents large activated carbon particles from directly contacting the heating device within the heating chamber, thus preventing high-temperature damage to the large activated carbon particles caused by the heating device. Therefore, this solution helps reduce the decrease in adsorption capacity after activated carbon regeneration.

[0028] This application also provides a hydrothermal alkali regeneration method for saturated activated carbon. This hydrothermal alkali regeneration method for saturated activated carbon can be applied to the hydrothermal alkali regeneration equipment for saturated activated carbon provided in this application. The hydrothermal alkali regeneration method for saturated activated carbon includes:

[0029] Step 1: Add the first volume of saturated activated carbon to be regenerated into the regeneration chamber;

[0030] Step 2: Add a second volume of regenerated alkali solution to the receiving cavity. The second volume is 0.7 to 1 times the first volume. The regenerated alkali solution is a 4% to 10% NaOH solution.

[0031] Step 3: Heat the saturated activated carbon and regenerated alkali solution to 250°C to 270°C within a first preset time period, which is 1.5 hours to 2 hours.

[0032] Step 4: Maintain the temperature inside the containment chamber until the regenerated alkali solution reacts fully with the adsorbed substances in the saturated activated carbon;

[0033] Step 5: Adjust the pressure inside the receiving cavity to reduce the pressure inside the receiving cavity to normal pressure at a uniform rate;

[0034] Step 6: Discharge the regenerated alkali solution and activated carbon from the containment chamber. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a cross-section of a regeneration reactor provided in some embodiments of this application. Figure 1 ;

[0037] Figure 2 This application provides the principle of a saturated activated carbon hydrothermal alkali regeneration device in some embodiments. Figure 1 ;

[0038] Figure 3 This application provides the principle of a saturated activated carbon hydrothermal alkali regeneration device in some embodiments. Figure 2 ;

[0039] Figure 4 This is a control principle diagram of a saturated activated carbon hydrothermal alkali regeneration device provided in some embodiments of this application;

[0040] Figure 5 This is a cross-section of a regeneration reactor provided in some embodiments of this application. Figure 2 ;

[0041] Figure 6 This is a cross-section of a regeneration reactor provided in some embodiments of this application. Figure 3 ;

[0042] Figure 7 This is a schematic diagram of the vessel structure of the regeneration reactor provided in some embodiments of this application;

[0043] Figure 8 This is a cross-section of a regeneration reactor provided in some embodiments of this application. Figure 4 ;

[0044] Figure 9 This is a cross-section of a regeneration reactor provided in some embodiments of this application. Figure 5 .

[0045] Figure Labels

[0046] Description: 100-Regeneration reactor; 101-Containing cavity; 102-Heating chamber; 103-Regeneration chamber; 104-Mounting hole; 110-Bottle body; 111-Alkali outlet; 112-Activated carbon outlet; 113-Steam outlet; 120-Filter screen; 130-Heating device; 140-Cleaning device; 141-Rotary nozzle; 150-Regeneration alkali pump; 151-First branch; 152-Second branch; 160-Baffle plate; 161-Flow hole; 200-Alkali preparation tank; 300-First heat exchanger; 400-Saturated activated carbon container; 500-Second heat exchanger; 600-Alkali recovery tank; 700-First filter box; 800-Second filter box; 810-Neutralization Cleaning fluid pipeline; 811-Cleaning fluid pipeline; 812-Neutralizing fluid pipeline; 813-Neutralizing fluid feed pump; 900-Neutralizing cleaning tank; 910-First supernatant pipeline; 920-Second supernatant pipeline; 930-Third supernatant pipeline; 1000-Circulation pump; 1100-Waste cleaning fluid tank; 1200-Waste neutralizing fluid tank; 1300-Temperature sensor; 1400-Pressure sensor; 1500-Pressure regulating valve; 1600-Controller; 1700-Alkali feed pump; 1900-Slurry pump; 191-Third branch; 192-Fourth branch; 2000-Screw feeder; 2100-Water purification device; 2200-Ultrasonic level gauge; 2300-Heat transfer oil heating device. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0048] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0049] The following is in conjunction with the appendix Figures 1 to 6The saturated activated carbon hydrothermal alkali regeneration equipment and regeneration method provided in this application will be described in detail through specific embodiments and application scenarios.

[0050] Reference Figure 2 This application provides a hydrothermal alkaline regeneration device for saturated activated carbon, which can be used for the regeneration of activated carbon adsorbing new pollutants. The device includes a regeneration reactor 100. Specifically, the regeneration reactor 100 provides a regeneration reaction site for the regeneration of saturated activated carbon. (See reference...) Figure 1 The regeneration reactor 100 includes a reactor body 110, a filter screen 120, and a heating device 130. The reactor body 110 is a basic structural component that provides a mounting base for other components.

[0051] For example, such as Figure 1 As shown, the vessel body 110 has a receiving cavity 101. The receiving cavity 101 can be used to contain regenerated alkali solution. A filter screen 120 is disposed in the receiving cavity 101, dividing the receiving cavity 101 into a heating cavity 102 and a regeneration cavity 103. The filter screen 120 can prevent granular activated carbon from entering the heating cavity 102. A heating device 130 is disposed in the heating cavity 102 and is used to heat the regenerated alkali solution in the receiving cavity 101.

[0052] In some embodiments, the filter 120 may be, but is not limited to, a stainless steel filter. Specifically, the filter 120 may be welded or bolted to the vessel body 110. For example, the pore size of the filter 120 may be less than or equal to 30 mesh, which helps to prevent activated carbon particles with a particle size greater than 30 mesh from entering the heating chamber 102.

[0053] During the regeneration of saturated activated carbon, regeneration alkali solution and saturated activated carbon are added to the regeneration chamber 103. Specifically, a portion of the regeneration alkali solution passes through the filter 120 into the heating chamber 102, while the activated carbon particles are separated within the regeneration chamber 103 by the filter 120, thus preventing the activated carbon particles from filling the heating chamber 102. The regeneration alkali solution is then heated by the heating device 130, allowing the substances adsorbed in the activated carbon particles to react with the regeneration alkali solution at a preset temperature, thereby achieving saturated activated carbon regeneration.

[0054] Reference Figure 2 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment includes a saturated activated carbon container 400. The saturated activated carbon container 400 can be used to store saturated activated carbon to be regenerated.

[0055] Specifically, during the heating and regeneration of the alkali solution, since large activated carbon particles will not enter the heating chamber 102, activated carbon can be prevented from filling and covering the heating device 130, thereby preventing high temperature damage to the activated carbon on the surface of the heating device 130.

[0056] It should be noted that, in order to ensure that the regenerated alkali solution in the reactor 110 can reach the ideal reaction temperature required for saturated activated carbon regeneration, the actual surface temperature of the heating device 130 is generally higher than the reaction temperature required for saturated activated carbon regeneration. In particular, to increase the activated carbon regeneration rate, it is necessary to quickly raise the regenerated alkali solution to the reaction temperature required for saturated activated carbon regeneration, which further increases the actual surface temperature of the heating device 130. This results in the actual surface temperature of the heating device 130 being higher than the temperature that the activated carbon can withstand, leading to easy damage to the activated carbon in contact with the heating device 130 or a reduction in its adsorption capacity after regeneration. Although the surface temperature of the heating device 130 can be controlled to keep it within the temperature range that the activated carbon can withstand, this reduces the efficiency of the hydrothermal alkali regeneration equipment for processing saturated activated carbon, thereby reducing the utilization rate of the equipment.

[0057] The hydrothermal alkaline regeneration equipment for saturated activated carbon provided in this application can balance the regeneration efficiency of saturated activated carbon with the avoidance of high-temperature damage to activated carbon during the regeneration process, thereby helping to solve the problem of reduced adsorption capacity of activated carbon after regeneration in the prior art.

[0058] In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment provided in this embodiment can also be used for the regeneration of powdered saturated activated carbon. It should be noted that the powdered saturated activated carbon described in this application refers to saturated activated carbon particles with a particle size smaller than that of the filter screen 120. Specifically, during the processing of powdered saturated activated carbon, the activated carbon particles entering through the filter screen 120 are generally small particles. During the heating process of the regeneration alkali solution by the heating device 130, the bubbles generated by the vaporization of the liquid after heating can carry the small activated carbon particles, thereby preventing the activated carbon from being in prolonged contact with the surface of the heating device 130, thus helping to reduce the damage caused by high temperatures during the activated carbon regeneration process or the decrease in adsorption capacity after regeneration.

[0059] Reference Figure 2 and Figure 3 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes an alkali preparation tank 200 and a first heat exchanger 300. The alkali preparation tank 200 is connected to the receiving cavity 101. The alkali preparation tank 200 is used to prepare regenerated alkali and supply it to the receiving cavity 101. The first heat exchanger 300 is disposed in the alkali preparation tank 200. The first heat exchanger 300 is connected to the top of the receiving cavity 101. Steam in the receiving cavity 101 can enter the first heat exchanger 300 and heat the regenerated alkali in the alkali preparation tank 200.

[0060] Specifically, once the temperature inside the reactor 110 reaches the temperature required for the activated carbon regeneration reaction, the temperature can be maintained by continuous heating. If the pressure inside the reactor 110 exceeds a preset value, some steam can be released through a steam valve located at the top of the reactor 110 to stabilize the pressure. Furthermore, after the activated carbon regeneration reaction is complete, some steam can be released through the steam valve at the top of the reactor 110 to reduce the pressure inside the reactor 110 to atmospheric pressure.

[0061] In the above embodiment, the steam emitted from the reactor 110 can be used to preheat the regenerated alkali solution in the alkali solution preparation tank 200. This helps to shorten the heating time for the next activated carbon regeneration and improve the activated carbon regeneration efficiency. In addition, this embodiment also helps to achieve heat recovery and reduce the energy consumption of activated carbon regeneration.

[0062] For example, the first heat exchange device 300 can be, but is not limited to, a heat exchanger. Specifically, such as Figure 2 and Figure 3 As shown, the heat exchange tubes in the first heat exchange device 300 are located at the bottom of the alkali preparation tank 200. In some optional embodiments, the capacity of the alkali preparation tank 200 can be the volume of regenerated alkali required at the maximum processing capacity of the vessel 110.

[0063] In some embodiments, the alkali preparation tank 200 is connected to the heating chamber 102. For example, the heating chamber 102 is provided with an alkali spray pipe, which has multiple spray holes facing the filter screen 120. Specifically, the alkali spray pipe is connected to the alkali preparation tank 200 to clean the heating chamber 102 during the addition of regenerated alkali.

[0064] In some embodiments, the alkali spray pipe is also connected to a cleaning pipeline. Exemplarily, the cleaning pipeline can be, but is not limited to, a pipe for conveying clean water. In some embodiments, the cleaning pipeline can also be a pipeline for conveying supernatant. Optionally, the alkali spray pipe is equipped with a three-way valve. Specifically, the three-way valve on the alkali spray pipe can be used to select whether the cleaning pipeline or the alkali preparation tank 200 provides the cleaning liquid.

[0065] Reference Figure 2 and Figure 3 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment also includes an alkali feed pump 1700. For example, the inlet section of the alkali feed pump 1700 is connected to the alkali preparation tank 200, and the outlet end of the alkali feed pump 1700 is connected to the reactor body 110, so as to provide power for the regenerated alkali to enter the reactor body 110 through the alkali feed pump 1700.

[0066] In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a saturated activated carbon container 400 and a second heat exchange device 500. The saturated activated carbon container 400 is used to contain the saturated activated carbon to be regenerated. The second heat exchange device 500 is disposed within the saturated activated carbon container 400.

[0067] Reference Figure 2 and Figure 3 In some embodiments, the second heat exchange device 500 is connected to the first heat exchange device 300, and the fluid passing through the first heat exchange device 300 can enter the second heat exchange device 500 and heat the saturated activated carbon in the saturated activated carbon container 400. Specifically, the steam discharged from the vessel body 110 first exchanges heat with the regenerated alkali solution in the alkali solution preparation tank 200 through the first heat exchange device 300, and then exchanges heat with the saturated activated carbon in the saturated activated carbon container 400 through the second heat exchange device 500, which is beneficial to improving the utilization rate of thermal energy.

[0068] In some embodiments, the second heat exchange device 500 can also be connected to the top of the receiving cavity 101, allowing steam in the receiving cavity 101 to enter the second heat exchange device 500 and heat the saturated activated carbon in the saturated activated carbon container 400. This embodiment can utilize the steam discharged from the vessel body 110 to heat the saturated activated carbon for the next regeneration, not only achieving heat recovery but also shortening the heating time of the saturated activated carbon regeneration reaction and improving the efficiency of saturated activated carbon regeneration.

[0069] In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment includes only two second heat exchange devices 500, wherein at least one second heat exchange device 500 is directly connected to the top of the receiving cavity 101, so that steam in the vessel body 110 can directly enter the second heat exchange device 500 to exchange heat with the saturated activated carbon to be regenerated next. At least one second heat exchange device 500 is connected to the first heat exchange device 300, and the steam in the vessel body 110 first enters the first heat exchange device 300 to exchange heat with the regenerated alkali solution required for the next regeneration, and then enters the second heat exchange device 500 to exchange heat with the saturated activated carbon to be regenerated next.

[0070] In the above embodiments, the ratio of the amount of steam directly entering the second heat exchange device 500 to the amount of steam directly entering the first heat exchange device 300 can be adjusted according to the heat demand of saturated activated carbon and regenerated alkali solution to improve the thermal energy utilization rate.

[0071] like Figure 2 and Figure 3 As shown, in some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes an alkali recovery tank 600. The alkali recovery tank 600 is connected to the bottom of the receiving cavity 101 and is used to store the regenerated alkali solution discharged from the vessel body 110.

[0072] like Figure 2 and Figure 3 As shown, in some embodiments, the alkali recovery tank 600 is connected to the first heat exchange device 300, and the fluid passing through the first heat exchange device 300 can enter the alkali recovery tank 600.

[0073] like Figure 2 and Figure 3 As shown, in some embodiments, the steam discharged from the vessel 110 is heat-exchanged by the first heat exchange device 300, and at least part of the steam condenses into liquid and flows into the alkali recovery tank 600.

[0074] like Figure 2 and Figure 3 As shown, in some embodiments, the alkali recovery tank 600 is connected to the second heat exchange device 500, and the fluid passing through the second heat exchange device 500 can enter the alkali recovery tank 600.

[0075] like Figure 2 and Figure 3 As shown, in some embodiments, the steam discharged from the vessel 110 is heat-exchanged by the second heat exchange device 500, and at least part of the steam is condensed into liquid and flows into the alkali recovery tank 600.

[0076] like Figure 2 and Figure 3 As shown, in some embodiments, the regenerated alkali solution discharged from the reactor body 110 can be precipitated and separated into powdered activated carbon and supernatant in the alkali solution recovery tank 600.

[0077] like Figure 2 and Figure 3 As shown, in some embodiments, the regeneration reactor 100 also includes a regeneration alkali pump 150. For example, the bottom of the regeneration alkali pump 150 is connected to the bottom of the reactor body 110, and the outlet end of the regeneration alkali pump 150 is connected to the alkali recovery tank 600, so that the regeneration alkali pump 150 can pump the liquid in the reactor body 110 into the alkali recovery tank 600.

[0078] Reference Figure 1 In some embodiments, the regeneration reactor 100 further includes a cleaning device 140 disposed in the receiving cavity 101. The bottom of the alkali recovery tank 600 and / or the receiving cavity 101 is connected to the inlet end of the regeneration alkali pump 150, and the outlet end of the regeneration alkali pump 150 is connected to the cleaning device 140.

[0079] Reference Figure 2 For example, the outlet of the regenerated alkali pump 150 is connected to the cleaning device 140 and the alkali recovery tank 600 through independent pipeline branches, and each pipeline branch is equipped with a valve for controlling the opening and closing of the corresponding pipeline branch.

[0080] Reference Figure 2In some embodiments, the inlet end of the regenerated alkali pump 150 is connected to a first branch 151 and a second branch 152, wherein the first branch 151 is connected to the bottom of the vessel body 110, and the second branch 152 is connected to the alkali recovery tank 600.

[0081] In some embodiments, the second branch 152 is connected to the alkali recovery tank 600 at the upper middle part of the alkali recovery tank 600, so as to draw the supernatant in the alkali recovery tank 600.

[0082] Reference Figure 2 In some embodiments, both the first branch 151 and the second branch 152 are equipped with valves to control the opening and closing of the corresponding pipelines. Specifically, when it is necessary to discharge the liquid in the vessel 110, the valve located in the first branch 151 is opened and the valve located in the second branch 152 is closed. When it is necessary to recycle the waste alkali solution, the valve located in the first branch 151 can be closed and the valve located in the second branch 152 can be opened.

[0083] For example, after each activated carbon regeneration, the interior of the vessel body 110 can be rinsed by drawing alkali from the alkali recovery tank 600 using the regeneration alkali pump 150.

[0084] Reference Figure 1 In some embodiments, the cleaning device 140 includes a cavity 101. Exemplarily, the cleaning device 140 has a rotating nozzle 141 disposed within a regeneration chamber 103 and used to clean residual activated carbon within the regeneration chamber 103. In some embodiments, the cleaning device 140 may also be used to inject usable alkali solution from a recovery alkali solution recovery tank 600 into the cavity 101.

[0085] Reference Figure 2 In some embodiments, the outlet end of the regenerated alkali pump 150 can also be connected to the alkali spray pipe in the heating chamber 102 for cleaning the heating chamber 102. In some embodiments, the alkali spray pipe in the heating chamber 102 can also be used to inject usable alkali from the recycled alkali recovery tank 600 into the receiving chamber 101.

[0086] Combination Figure 1 and Figure 2 In some embodiments, the alkali outlet 111 at the bottom of the vessel 110 is equipped with a filter screen to prevent particulate activated carbon from entering the liquid discharge pipe section. For example, the filter screen at the alkali outlet 111 at the bottom of the vessel 110 has a mesh size of 30 or less. The regenerated alkali pump 150 is connected to the alkali outlet 111.

[0087] Reference Figure 2 and Figure 3In some embodiments, the outlet end of the regenerated alkali pump 150 is provided with two branches: one branch connects to the alkali recovery tank 600, and the other branch connects to the alkali preparation tank 200. Furthermore, each of the two branches connected to the outlet end of the regenerated alkali pump 150 is equipped with a valve to control the opening and closing of the corresponding branch. For example, when it is necessary to pump the liquid in the vessel 110 into the alkali recovery tank 600, the valve on the branch connecting to the alkali preparation tank 200 is closed, and the valve on the branch connecting to the alkali recovery tank 600 is opened. When it is necessary to recover the regenerated alkali, the valve on the branch connecting to the alkali preparation tank 200 can be opened, and the valve on the branch connecting to the alkali recovery tank 600 can be closed.

[0088] Reference Figure 2 In some embodiments, the bottom of the alkali recovery tank 600 is designed in a cone shape to facilitate the discharge of powdered activated carbon.

[0089] Reference Figure 1 and Figure 2 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a first filter box 700, which is connected to the vessel body 110, and the activated carbon in the vessel body 110 can enter the first filter box 700 from the regeneration chamber 103. The first filter box 700 is connected to the alkali recovery tank 600, and the regenerated alkali solution separated by the first filter box 700 can enter the alkali recovery tank 600.

[0090] Reference Figure 2 For example, larger particles of activated carbon discharged from the vessel body 110 can enter the first filter box 700 via a screw conveyor 2000. For example, an activated carbon discharge outlet 112 is provided at the bottom of the vessel body 110. The activated carbon discharge outlet 112 can be connected to the screw conveyor 2000 so that the larger particles of activated carbon in the vessel body 110 can be transferred to the first filter box 700 via the screw conveyor 2000.

[0091] Reference Figure 2 and Figure 3 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a second filter box 800, a neutralization and cleaning box 900, and a circulation pump 1000. The neutralization and cleaning box 900 is connected to the reactor body 110, and the regenerated alkali solution and / or powdered activated carbon in the reactor body 110 can enter the neutralization and cleaning box 900. The bottom of the neutralization and cleaning box 900 is connected to the inlet end of the circulation pump 1000. The outlet end of the circulation pump 1000 is connected to the second filter box 800, which is connected to the neutralization and cleaning box 900, and the liquid separated by the second filter box 800 can enter the neutralization and cleaning box 900.

[0092] Reference Figure 2For example, a slurry pump 1900 is provided between the neutralization and cleaning tank 900 and the vessel body 110. For example, the inlet end of the slurry pump 1900 is connected to the liquid outlet at the bottom of the vessel body 110, and the outlet end of the slurry pump 1900 is connected to the neutralization and cleaning tank 900, so that the slurry pump 1900 can pump the liquid in the vessel body 110 and the powdered activated carbon mixed in the liquid into the neutralization and cleaning tank 900.

[0093] In some embodiments, the bottom of the neutralization and cleaning tank 900 is designed in a cone shape to facilitate the discharge of powdered activated carbon.

[0094] Reference Figure 2 In some embodiments, the inlet end of the slurry pump 1900 is connected to a third branch 191 and a fourth branch 192. Exemplarily, the third branch 191 is connected to the bottom liquid outlet of the vessel body 110. The fourth branch 192 is used to connect to the bottom of the first filter box 700, so that the slurry pump 1900 can pump the mixture of bottom liquid from the first filter box 700 and powdered activated carbon into the neutralization and cleaning tank 900.

[0095] Reference Figure 2 In some embodiments, a neutralization cleaning solution pipeline 810 is provided inside the second filter tank 800. The neutralization cleaning solution pipeline 810 is used to add neutralizing liquid and / or cleaning liquid into the second filter tank 800. Exemplarily, the neutralization cleaning solution pipeline 810 includes a cleaning liquid pipeline 811 and a neutralizing liquid pipeline 812. The cleaning liquid pipeline 811 is used to inject cleaning liquid into the second filter tank 800. The neutralizing liquid pipeline 812 is used to inject neutralizing liquid into the second filter tank 800. Exemplarily, the cleaning liquid can be, but is not limited to, clean water. The neutralizing liquid can be, but is not limited to, an acidic solution.

[0096] Reference Figure 2 In some embodiments, the second filter box 800 is connected to the first filter box 700. Specifically, the first filter box 700 and the second filter box 800 are connected via a screw conveyor 2000. Specifically, the large-particle activated carbon filtered in the first filter box 700 can be transferred to the second filter box 800 via the screw conveyor 2000 for neutralization, cleaning, and filtration.

[0097] Reference Figure 2 In some embodiments, the neutralization and cleaning tank 900 has a first supernatant line 910. The first supernatant line 910 is connected to the alkali preparation tank 200, and the supernatant in the neutralization and cleaning tank 900 can enter the alkali preparation tank 200 along the first supernatant line 910.

[0098] For example, in the process of processing powdered saturated activated carbon, usable regenerated alkali solution can be recovered through the first supernatant pipeline 910. Specifically, after the mixture of liquid and powdered activated carbon in the reactor 110 settles in the neutralization and washing tank 900, the supernatant in the neutralization and washing tank 900 can be recovered to the alkali preparation tank 200 through the first supernatant pipeline 910. Then, the circulation pump 1000 and the neutralization liquid pipeline 812 are turned on to neutralize the activated carbon and the liquid. Finally, the washing liquid pipeline 811 is turned on to wash the activated carbon in the neutralization and washing tank 900 and / or the second filter tank 800. For example, the neutralization liquid pipeline 812 is connected to the neutralization liquid feed pump 813 to pump the neutralization liquid into the second filter tank 800.

[0099] Reference Figure 2 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a waste cleaning liquid tank 1100. The neutralization cleaning tank 900 has a second supernatant pipeline 920. The second supernatant pipeline 920 is connected to the waste cleaning liquid tank 1100, and the supernatant in the neutralization cleaning tank 900 can enter the waste cleaning liquid tank 1100 along the second supernatant pipeline 920. Exemplarily, the waste cleaning liquid tank 1100 is used to store waste liquid generated during the cleaning process.

[0100] Reference Figure 2 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a waste neutralization liquid tank 1200. The neutralization washing tank 900 has a third supernatant line 930. The third supernatant line 930 is connected to the waste neutralization liquid tank 1200, and the supernatant in the neutralization washing tank 900 can enter the waste neutralization liquid tank 1200 along the third supernatant line 930. Exemplarily, the waste neutralization liquid tank 1200 is used to store waste liquid generated during the neutralization process.

[0101] Reference Figure 2 In some embodiments, the cleaning fluid line 811 may be connected to the water purification device 2100 to inject cleaning fluid into the second filter box 800 through the water purification device 2100.

[0102] Reference Figure 2 In some embodiments, the water purification device 2100 is connected to the alkali preparation tank 200 to provide clean water for preparing regenerated alkali solution into the alkali preparation tank 200.

[0103] For example, the water purification device 2100 can be a sodium ion exchanger including a brine tank and a brine pump. Specifically, the water purification device 2100 softens tap water and uses it as makeup water for regeneration alkali solution, neutralization solution, and cleaning water, minimizing the impact of scale on the entire device, thus saving energy and extending the maintenance cycle.

[0104] Reference Figure 1 , Figure 3 and Figure 5 ,in Figure 5 The filter pore structure of filter screen 120 is not shown in the diagram. In some embodiments, heating device 130 is an electric heating rod. For example, regeneration reactor 100 has multiple electric heating rods, which are spaced apart and evenly distributed along the circumference of reactor body 110. For example, eight electric heating rods are arranged along the circumference of reactor body 110.

[0105] Reference Figure 1 , Figure 4 and Figure 5 In some embodiments, the regeneration reactor 100 further includes multiple layers of guide plates 160. The guide plates 160 are distributed vertically at intervals within the heating chamber 102. The guide plates 160 are inclined upwards along the direction from the heating chamber 102 to the receiving chamber 101.

[0106] In the above embodiment, the guide plate 160 can effectively block the vertical rise of bubbles generated during the heating process of the electric heating device 130, thus extending the trajectory of the bubbles formed during heating within the regenerated alkali solution, which is beneficial for the rapid heating of the regenerated alkali solution. Furthermore, the guide plate 160 is inclined upwards along the direction from the heating chamber 102 to the receiving chamber 101. This facilitates the movement of bubbles generated during heating into the regeneration chamber 103, thereby rapidly transferring heat to the regeneration chamber 103 and increasing the heating rate within the regeneration chamber 103.

[0107] Reference Figure 2 and Figure 6 In some embodiments, the heating device 130 may also be a heat transfer oil heat exchanger. For example, the heat transfer oil heat exchanger is disposed within the heating chamber 102 for heat exchange with the regenerated alkali solution within the heating chamber 102. Specifically, the heat transfer oil heat exchanger is connected to a heat transfer oil heating device 2300 outside the vessel body 110.

[0108] Reference Figure 1 In some embodiments, the filter 120 has a cylindrical structure, and the filter 120 is coaxially arranged with the vessel body 110, and a heating chamber 102 surrounding the regeneration chamber 103 is formed between the filter 120 and the vessel body 110. Exemplarily, the heating chamber 102 is a cylindrical cavity structure surrounding the outer periphery of the regeneration chamber 103.

[0109] In some embodiments, the outer layer of the vessel body 110 is provided with a heat insulation layer to reduce the energy consumption of the saturated activated carbon hydrothermal alkali regeneration equipment.

[0110] Reference Figure 4In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a temperature sensor 1300 and a controller 1600. Exemplarily, the temperature sensor 1300 is used to detect temperature information within the receiving cavity 101, and the controller 1600 is connected to both the temperature sensor 1300 and the heating device 130, and is used to acquire the temperature information detected by the temperature sensor 1300. Specifically, the controller 1600 can adjust the power of the heating device 130 according to the temperature information.

[0111] Reference Figure 4 In some embodiments, the saturated activated carbon hydrothermal alkali regeneration equipment also includes a pressure sensor 1400. The pressure sensor 1400 is used to detect pressure information within the receiving cavity 101. A controller 1600 is connected to both the pressure sensor 1400 and the pressure regulating valve 1500, and is used to control the opening and closing of the pressure regulating valve 1500 based on the pressure information. For example, when the pressure inside the vessel 110 is greater than a first preset pressure value, the pressure regulating valve 1500 is opened. Specifically, the pressure regulating valve 1500 can be a steam valve located at the top of the vessel 110. When the pressure inside the vessel 110 is less than or equal to the first preset pressure value, the pressure regulating valve 1500 is closed. For example, the first preset pressure is 3 MPa to 6.6 MPa. Preferably, the first preset pressure is 6 MPa.

[0112] Reference Figure 1 and Figure 2 For example, a steam outlet 113 is provided at the top of the vessel body 110. For example, a pressure regulating valve 1500 is provided at the steam outlet 113 and is used to control the opening or closing of the steam outlet 113.

[0113] In some embodiments, the top of the filter 120 is below the surface of the regenerated alkali solution inside the vessel 110.

[0114] In some embodiments, the guide plate 160 has a spiral structure. Specifically, the regenerated alkali solution in the heating chamber 102 can flow along the guide plate 160 to the bottom of the vessel body 110.

[0115] In some embodiments, the flow guide plate 160 has a flow passage 161 on the side adjacent to the inner wall of the vessel body 110. Exemplarily, the flow passage 161 extends through the flow guide plate 160 so that the regenerated alkali solution in the heating chamber 102 can flow along the flow passage 161 to the bottom of the vessel body 110.

[0116] Reference Figure 4In some embodiments, the regeneration reactor 100 further includes an ultrasonic level gauge 2200. Exemplarily, the ultrasonic level gauge 2200 is used to detect the liquid level and activated carbon level within the regeneration reactor 100. The ultrasonic level gauge 2200 is connected to a controller 1600, and the controller 1600 is used to acquire the liquid level and activated carbon level information detected by the ultrasonic level gauge 2200 within the regeneration reactor 100, and to control the volume of regenerated alkali solution and saturated activated carbon added to the reactor body 110 based on the detected liquid level and activated carbon level information.

[0117] Specifically, saturated activated carbon can be added into the regeneration reactor 100 via a screw feeder 2000.

[0118] For example, controller 1600 is connected to screw feeder 2000 and alkali feed pump 1700, which are connected to the feed inlet of regeneration reactor 100, respectively, to control the start-up or shutdown of screw feeder 2000 and / or alkali feed pump 1700. For example, saturated activated carbon can be added to regeneration chamber 103 from feed inlet of regeneration reactor 100.

[0119] Reference Figure 7 and Figure 8 In some embodiments, the heating device 130 is an electric heating rod. The side wall of the vessel body 110 is provided with a plurality of mounting holes 104 for mounting the heating device 130. The mounting holes 104 are spaced apart along the vertical direction of the vessel body 110 and penetrate through the side wall of the vessel body 110 and communicate with the heating chamber 102. The heating device 130 extends into the heating chamber 102 through the mounting hole 104 and is sealed with the vessel body 110.

[0120] Reference Figure 9 In some embodiments, the filter 120 can be fitted onto the electric heating rod to prevent the heating wire of the electric heating rod from directly contacting the activated carbon particles. For example, when assembling or disassembling the electric heating rod, the filter 120 can also protect the heating wire of the electric heating rod, which helps to prevent the heating wire of the electric heating rod from colliding and being damaged by the vessel body 110.

[0121] Reference Figure 8 In some embodiments, the filter screen 120 can also be disposed on the inner wall of the vessel body 110, and the mounting hole 104 is coaxially disposed with the filter screen 120. During the installation process, the electric heating rod can be horizontally inserted into the mounting hole 104 to cover the electric heating rod with the filter screen 120 to prevent activated carbon particles larger than the pore size of the filter screen 120 from contacting the electric heating rod.

[0122] In the above embodiment, the electric heating rod is horizontally positioned in the reactor body 110. This allows for selective activation of the heating rod below the liquid level based on the liquid level within the reactor body 110. This facilitates flexible adjustment of the amount of saturated activated carbon processed in a single batch. Furthermore, the horizontal insertion portion of the electric heating rod can extend to the center of the internal space of the reactor body 110, directly heating the regenerated alkali solution in the central region of the reactor body 110. This promotes rapid heating of the alkali solution within the reactor body 110, thereby improving the efficiency of the regeneration reactor 100 in processing saturated activated carbon.

[0123] In some embodiments, the mounting holes 104 can be spirally arranged around the vessel body 110. This ensures that electric heating rods at different heights heat the regenerated alkali solution, improving the temperature uniformity within the vessel body 110 in the vertical direction, and also allows for uniform distribution of heating rods along the circumference of the vessel body 110. Therefore, this embodiment is beneficial in ensuring that the regenerated alkali solution within the vessel body 110 is heated evenly, thus improving the temperature uniformity throughout the vessel body 110.

[0124] Reference Figure 8 and Figure 9 In some embodiments, the electric heating rod can be inserted radially into the vessel body 110, which can avoid interference between two adjacent electric heating rods and facilitate the disassembly and assembly of the electric heating rod.

[0125] In some embodiments, the number and / or heating power of the electric heating rods decrease from the bottom to the top of the vessel 110. This is beneficial for temperature uniformity within the vessel 110.

[0126] This application also provides a hydrothermal alkali regeneration method for saturated activated carbon. This hydrothermal alkali regeneration method for saturated activated carbon can be applied to the hydrothermal alkali regeneration equipment for saturated activated carbon provided in this application.

[0127] In some embodiments, the hydrothermal alkali regeneration method for saturated activated carbon provided in this application includes:

[0128] Step 1: Add the first volume of saturated activated carbon to be regenerated into the regeneration chamber;

[0129] Step 2: Add a second volume of regenerated alkali solution to the receiving cavity. The second volume is 0.7 to 1.2 times the first volume. The regenerated alkali solution is a 4% to 10% NaOH solution.

[0130] Step 3: Heat the saturated activated carbon and regenerated alkali solution to 250°C to 270°C within a first preset time period, which is 1.5 hours to 2 hours.

[0131] Step 4: Maintain the temperature inside the containment chamber until the regenerated alkali solution reacts fully with the adsorbed substances in the saturated activated carbon;

[0132] Step 5: Adjust the pressure inside the receiving cavity to reduce the pressure inside the receiving cavity to normal pressure at a uniform rate;

[0133] Step 6: Discharge the regenerated alkali solution and activated carbon from the containment chamber.

[0134] In some embodiments, the hydrothermal alkali regeneration method for saturated activated carbon further includes:

[0135] If the pressure inside the regeneration reactor exceeds the first preset pressure, the steam valve at the top of the regeneration reactor is opened to release some steam and maintain the pressure inside the reactor within a reasonable range. For example, the first preset pressure is 3 MPa to 6.6 MPa. Preferably, the first preset pressure is 6 MPa.

[0136] For example, the level of the regenerated alkali solution is higher than the level of the saturated activated carbon. Specifically, the level of the alkali solution is 1 / 3 to 3 / 5 higher than the level of the activated carbon.

[0137] For example, it is expected to be 0.5m 3 The amount of regenerated alkali solution corresponding to the waste activated carbon is estimated to be approximately 300-400 kg. The single addition volume of the regenerated alkali solution is approximately 0.4 m³. 3 (Approximately 417 kg). The volume ratio of saturated activated carbon to regenerated alkali solution can be determined based on the volume expansion of the solution when it reaches thermal saturation during the heating and pressurization process and the vaporization loss of the solution during the cooling and depressurization process. This ensures that the liquid surface always covers the surface of the activated carbon when the pressure is reduced to atmospheric pressure, thus preventing the activated carbon from leaking out of the water and being damaged by high temperature. This, in turn, helps to reduce the reduction in the adsorption capacity of the activated carbon after regeneration.

[0138] For example, under normal pressure, the enthalpy of water at 25°C is 25 kcal / kg, the enthalpy of water at 100°C is 100 kcal / kg, and the enthalpy of saturated steam at 100°C is 638.8 kcal / kg. Under conditions of 6 MPa pressure and 270°C, the enthalpy of water is 283.1 kcal / kg. The volume of activated carbon is 0.5 m³. 3 The amount of regenerated alkali solution added at one time is approximately 0.4m³. 3 The water content is approximately 400 kg.

[0139] 400 kg of water at 6 MPa and 270°C releases 73,200 kcal of heat when cooled to atmospheric pressure and 100°C. Specifically, this heat is released as saturated steam. Heating 400 kg of water from 25°C to 100°C requires 30,000 kcal of heat. Ignoring the heat absorption and release of activated carbon, the heat released when the reactor is cooled and depressurized from 6 MPa and 270°C to atmospheric pressure and 100°C is more than 43,200 kcal of heat released when heating 400 kg of water from 25°C to 100°C. Therefore, the steam discharged from the regeneration reactor 100 after the regeneration reaction can be used to heat the regenerated alkali solution required for the next regeneration. In some embodiments, the steam discharged from the regeneration reactor 100 after the regeneration reaction can be used to heat the regenerated alkali solution required for the next regeneration to 100°C through the first heat exchanger 300. Furthermore, the remaining heat can be used through the second heat exchanger 500 to heat the saturated activated carbon to be regenerated next time.

[0140] When the reactor is cooled and depressurized from 6 MPa and 270℃ to atmospheric pressure and 100℃, approximately 114.6 kg of water can evaporate. This means that when the reactor is cooled and depressurized from 6 MPa and 270℃ to atmospheric pressure and 100℃, 285.4 kg of water will remain out of the initial 400 kg of water. Under atmospheric pressure, the specific volume of water at 100℃ is 0.0010407 m³ / s. 3 / kg, when the reactor is heated to 6MPa and 270℃, the specific volume of water is 0.0013149m³. 3 / kg, the volume of 400kg of water will increase by 0.10968m³. 3 .

[0141] In some embodiments, after the regeneration reactor 100 is depressurized to atmospheric pressure, the bottom valve of the regeneration reactor 100 is opened to discharge the activated carbon. At the same time, regenerated alkali is input from the alkali recovery tank 600 to the rotary nozzle 141 so as to rinse the residual activated carbon through the regenerated alkali sprayed by the top rotary nozzle 141, so that the activated carbon in the reactor body 110 can flow out of the reactor with the liquid.

[0142] The granular activated carbon inside the vessel 110 is conveyed to the first filter box 700 via a screw conveyor 2000. The granular activated carbon filtered by the first filter box 700 can then be conveyed to the second filter box 800 via the screw conveyor 2000. In the second filter box 800, the granular activated carbon is neutralized, washed, and then unloaded, bagged, and transferred.

[0143] When the saturated activated carbon being processed contains powdered saturated activated carbon, the waste alkali solution and powdered activated carbon at the bottom of the regeneration reactor 100 are directly fed into the alkali recovery tank 600 for sedimentation via the regeneration alkali solution pump 150. Pressurized water from the supernatant at the top of the alkali recovery tank 600 is pumped by the regeneration alkali solution pump 150 and sprayed into the rotary nozzle 141 to clean the activated carbon on the reactor wall. After cleaning, the reactor continues to run for 1-2 minutes to flush the pipes and prevent them from being blocked by the powdered activated carbon.

[0144] The powdered activated carbon at the bottom of the alkali recovery tank 600 is pumped into the neutralization and cleaning tank 900 by the corrosion-resistant slurry pump 1900 for neutralization and cleaning to obtain regenerated powdered activated carbon with a higher moisture content.

[0145] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0146] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A saturated activated carbon hydrothermal alkali regeneration device, characterized in that, The reactor includes a regeneration reactor (100), which includes a reactor body (110), a filter screen (120), and a heating device (130). The reactor body (110) has a receiving cavity (101) which can be used to contain regenerated alkali solution. The filter screen (120) is disposed in the receiving cavity (101) and divides the receiving cavity (101) into a heating cavity (102) and a regeneration cavity (103). The filter screen (120) can block granular activated carbon from entering the heating cavity (102). The heating device (130) is disposed in the heating cavity (102) and is used to heat the regenerated alkali solution in the receiving cavity (101).

2. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 1, characterized in that, It also includes an alkali preparation tank (200) and a first heat exchange device (300). The alkali preparation tank (200) is connected to the receiving cavity (101). The alkali preparation tank (200) is used to prepare the regenerated alkali and supply the regenerated alkali to the receiving cavity (101). The first heat exchange device (300) is disposed in the alkali preparation tank (200) and is connected to the top of the receiving cavity (101). Steam in the receiving cavity (101) can enter the first heat exchange device (300) and heat the regenerated alkali in the alkali preparation tank (200).

3. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 2, characterized in that, It also includes a saturated activated carbon container (400) and a second heat exchange device (500), wherein the saturated activated carbon container (400) is used to contain saturated activated carbon to be regenerated, and the second heat exchange device (500) is disposed inside the saturated activated carbon container (400); The second heat exchange device (500) is connected to the first heat exchange device (300), and the fluid passing through the first heat exchange device (300) can enter the second heat exchange device (500) and heat the saturated activated carbon in the saturated activated carbon container (400); and / or, the second heat exchange device (500) is connected to the top of the receiving cavity (101), and the steam in the receiving cavity (101) can enter the second heat exchange device (500) and heat the saturated activated carbon in the saturated activated carbon container (400).

4. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 3, characterized in that, It also includes an alkali recovery tank (600); The alkali recovery tank (600) is connected to the bottom of the receiving cavity (101) and is used to store the regenerated alkali solution discharged from the vessel body (110); And / or, the alkali recovery tank (600) is connected to the first heat exchange device (300), and the fluid passing through the first heat exchange device (300) can enter the alkali recovery tank (600). And / or, the alkali recovery tank (600) is connected to the second heat exchange device (500), and the fluid passing through the second heat exchange device (500) can enter the alkali recovery tank (600).

5. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 4, characterized in that, The regeneration reactor (100) also includes a cleaning device (140) and a regeneration alkali pump (150). The cleaning device (140) is disposed in the receiving cavity (101). The bottom of the alkali recovery tank (600) and / or the receiving cavity (101) is connected to the inlet end of the regeneration alkali pump (150), and the outlet end of the regeneration alkali pump (150) is connected to the cleaning device (140).

6. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 5, characterized in that, The saturated activated carbon hydrothermal alkali regeneration equipment also includes a first filter box (700), which is connected to the vessel body (110). The activated carbon in the vessel body (110) can enter the first filter box (700) from the regeneration chamber (103). The first filter box (700) is connected to the alkali recovery tank (600), and the regenerated alkali solution separated by the first filter box (700) can enter the alkali recovery tank (600).

7. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 6, characterized in that, The saturated activated carbon hydrothermal alkali regeneration equipment also includes a second filter box (800), a neutralization and cleaning box (900), and a circulation pump (1000). The neutralization and cleaning box (900) is connected to the reactor body (110), and the regenerated alkali solution and / or powdered activated carbon in the reactor body (110) can enter the neutralization and cleaning box (900). The bottom of the neutralization and cleaning box (900) is connected to the inlet end of the circulation pump (1000), and the outlet end of the circulation pump (1000) is connected to the second filter box (800). The second filter box (800) is connected to the neutralization and cleaning box (900), and the liquid separated by the second filter box (800) can enter the neutralization and cleaning box (900).

8. The saturated activated carbon hydrothermal alkali regeneration equipment according to claim 7, characterized in that, The second filter box (800) is provided with a neutralization cleaning fluid pipeline (810), which is used to add neutralizing liquid and / or cleaning liquid into the second filter box (800); And / or, the neutralization and cleaning tank (900) has a first supernatant line (910) connected to the alkali preparation tank (200), and the supernatant in the neutralization and cleaning tank (900) can enter the alkali preparation tank (200) along the first supernatant line (910). And / or, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a waste cleaning liquid tank (1100), the neutralization cleaning tank (900) has a second supernatant pipeline (920), the second supernatant pipeline (920) is connected to the waste cleaning liquid tank (1100), and the supernatant in the neutralization cleaning tank (900) can enter the waste cleaning liquid tank (1100) along the second supernatant pipeline (920); And / or, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a waste neutralization liquid tank (1200), the neutralization cleaning tank (900) has a third supernatant pipeline (930), the third supernatant pipeline (930) is connected to the waste neutralization liquid tank (1200), and the supernatant in the neutralization cleaning tank (900) can enter the waste neutralization liquid tank (1200) along the third supernatant pipeline (930).

9. The saturated activated carbon hydrothermal alkali regeneration equipment according to any one of claims 1 to 8, characterized in that, The heating device (130) is an electric heating rod; And / or, the regeneration reactor (100) further includes multiple layers of guide plates (160), which are distributed vertically at intervals in the heating chamber (102) and are inclined upward along the direction from the heating chamber (102) to the receiving chamber (101); And / or, the filter (120) is a cylindrical structure, the filter (120) is coaxially arranged with the vessel body (110), and the filter (120) and the vessel body (110) form the heating chamber (102) surrounding the regeneration chamber (103). And / or, the saturated activated carbon hydrothermal alkali regeneration equipment further includes a temperature sensor (1300), a pressure sensor (1400), a pressure regulating valve (1500), and a controller (1600). The temperature sensor (1300) is used to detect the temperature information in the receiving cavity (101); the pressure sensor (1400) is used to detect the pressure information in the receiving cavity (101); the controller (1600) is connected to the temperature sensor (1300), the pressure sensor (1400), the pressure regulating valve (1500), and the heating device (130) respectively; the controller (1600) is used to acquire the temperature information detected by the temperature sensor (1300) and the pressure information detected by the pressure sensor (1400); the controller (1600) is used to adjust the power of the heating device (130) according to the temperature information; and the controller is used to control the opening and closing of the pressure regulating valve (1500) according to the pressure information. Alternatively, the heating device (130) is an electric heating rod, and the side wall of the vessel body (110) is provided with a plurality of mounting holes (104) for mounting the heating device (130). The mounting holes (104) are spaced apart along the vertical direction of the vessel body (110), and the mounting holes (104) penetrate the side wall of the vessel body (110) and communicate with the heating chamber (102). The heating device (130) extends into the heating chamber (102) from the mounting holes (104) and is sealed with the vessel body (110).

10. A method for hydrothermal alkali regeneration of saturated activated carbon, characterized in that, This method can be applied to the saturated activated carbon hydrothermal alkali regeneration equipment according to any one of claims 1 to 9, wherein the saturated activated carbon hydrothermal alkali regeneration method includes: Add a first volume of saturated activated carbon to be regenerated into the regeneration chamber; A second volume of regenerated alkali solution is added into the receiving cavity, the second volume being 0.7 to 1.2 times the first volume, and the regenerated alkali solution being a 4% to 10% NaOH solution; The saturated activated carbon and the regenerated alkali solution are heated to 250°C to 270°C within a first preset time period, which is 1.5 hours to 2 hours. Maintain the temperature inside the containment cavity until the regenerated alkali solution fully reacts with the adsorbed substances in the saturated activated carbon; Adjust the pressure inside the receiving cavity to reduce the pressure inside the receiving cavity to normal pressure at a uniform rate; The regenerated alkali solution and activated carbon in the containment cavity are discharged.

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