Quantitative liquid discharging and supplementing device for waste catalyst regeneration and control method

Abstract

The invention relates to a quantitative liquid discharging and supplementing device for waste catalyst regeneration and a control method, the device comprises: an activation tank for wet impregnation of a waste catalyst module; the liquid supplementing assembly is communicated with the activating tank and is used for supplementing activating liquid; the liquid discharging assembly is communicated with the activating tank and is used for discharging the activating liquid; the quantitative liquid discharging and supplementing control assembly is arranged on the liquid discharging assembly, and the quantitative liquid discharging and supplementing control assembly and the controlled activation tank form a communicating device; and the controller is in communication connection with the liquid inlet assembly, the liquid discharging assembly and the quantitative liquid discharging and supplementing control assembly. According to the device, the quantitative liquid discharging and supplementing control assembly and the activation tank form the communicating device to be matched with the controller to achieve variable-volume accurate liquid supplementing and liquid discharging control over the activation liquid easy to bubble, continuous and stable operation of the waste catalyst regeneration process and the quality of regenerated products are guaranteed, and good economical efficiency is achieved.

Description

Technical Field

[0001] The present application relates to the field of hazardous waste recycling, and in particular to a quantitative liquid discharge and replenishment device and a control method for regenerating waste catalysts. Background Art

[0002] At present, the regeneration and utilization of waste flue gas SCR denitrification catalysts requires the process of "ultrasonic cleaning-spray cleaning-chemical cleaning-bubbling cleaning-active substance implantation", among which the most important link is the implantation of active substances. Most active substance implantation processes adopt wet impregnation. The volume of the activation liquid before and after the wet impregnation of each module basically does not change, and the vanadium concentration in the activation liquid will decrease. Therefore, after each wet impregnation of a module, a certain volume of activation liquid needs to be drained, and then the same volume of high-concentration activation liquid is added. Some surfactants such as OP-10 and JFC penetrants are usually added to the activation liquid to promote the entry of active substances into the catalyst micropores. The addition of surfactant substances will cause a large amount of foam to be generated during the process of replenishment and bubbling drainage, which is very easy to cause false liquid level, making it difficult to accurately control the amount of high-concentration replenishment; at the same time, due to the influence of foam in the activation liquid, the liquid level is false during the drainage process, which will also make it difficult to accurately control the drainage volume. If the activation liquid is drained too much or replenished too much, the concentration of the activation liquid will be higher than the original concentration, resulting in a waste of activation liquid and increased regeneration costs; if the activation liquid is drained too little or replenished too little, the concentration of the activation liquid will be lower than the original concentration, and the loading amount of active substances in the regenerated catalyst will be insufficient, resulting in unqualified products. In addition, if the concentration of the activation liquid deviates from the original concentration due to the different vanadium loading amounts of different batches of catalysts, if it is not adjusted in time, it will also cause the regeneration products of the waste catalyst to be unqualified, increase costs, and reduce work efficiency.

[0003] Therefore, it is necessary to design a quantitative liquid discharge and liquid replenishment device and a control method for regenerating waste catalysts to solve the technical problems mentioned above. Summary of the invention

[0004] Based on this, a quantitative drainage and replenishment device and a control method for the regeneration of spent catalysts are provided to solve the problems that the activation liquid is easy to foam during the regeneration of spent denitrification catalysts, making it difficult to accurately control the drainage and replenishment volumes, and the concentration of the activation liquid deviates from the original activation liquid concentration due to different catalyst loadings in different batches.

[0005] To solve the above problems, the present application provides a quantitative drainage and replenishment device for regenerating waste catalysts, comprising: an activation tank, wherein the activation tank is used for wet impregnation of waste catalyst modules; a replenishment component, wherein the replenishment component is connected to the activation tank and is used to replenish the activation liquid; a drainage component, wherein the drainage component is connected to the activation tank and is used to discharge the activation liquid; a quantitative drainage and replenishment control component, wherein the quantitative drainage and replenishment control component is arranged on the drainage component, and the quantitative drainage and replenishment control component and the controlled activation tank form a connector; a controller, wherein the controller is respectively communicated with the replenishment component, the drainage component and the quantitative drainage and replenishment control component; during replenishment, when the liquid level in the quantitative drainage and replenishment control component reaches the replenishment position, the controller controls the drainage component to stop replenishment; during drainage, when the liquid level in the quantitative drainage and replenishment control component reaches the drainage position, the controller controls the drainage component to stop drainage.

[0006] A preferred solution is that the rehydration component includes a rehydration tube and a rehydration vanadium concentration detection instrument; the rehydration tube is connected to the activation tank, and the rehydration vanadium concentration detection instrument is arranged on the rehydration tube; the rehydration tube is also provided with a rehydration control valve for controlling the activation liquid to enter the activation tank through the rehydration tube.

[0007] A preferred solution is that the drainage assembly includes a drainage pipe, which is connected to the activation tank; a drainage control valve is provided on the drainage pipe to control the activation liquid to be discharged from the activation tank through the drainage pipe.

[0008] A preferred solution is that the quantitative drainage and replenishment control component includes a liquid level tube, which is arranged on the drainage pipe and is interconnected, the liquid level tube and the activation tank are parallel to each other, and the liquid level tube and the controlled activation tank form a connector; a sensor for sensing liquid levels of different heights is arranged in the liquid level tube, and the sensor is communicatively connected with the controller; when the sensor senses the replenishment level, the controller can control the opening and closing of the replenishment control valve to achieve quantitative replenishment; when the sensor senses the drainage level, the controller can control the opening and closing of the drainage control valve to achieve quantitative drainage.

[0009] A preferred solution is that the sensing element includes a first electrode liquid level gauge and a second electrode liquid level gauge; the first electrode liquid level gauge and the second electrode liquid level gauge are set with a height difference; the first electrode liquid level gauge is used to sense the replenishing liquid level in the liquid level tube; the second electrode liquid level gauge is used to sense the draining liquid level in the liquid level tube.

[0010] A preferred solution is that a first telescopic control device and a second telescopic control device are provided on both sides of the outside of the liquid level tube; the first telescopic control device is connected to the first electrode liquid level gauge, and is used to control the first electrode liquid level gauge to move up and down in the liquid level tube; the second telescopic control device is connected to the second electrode liquid level gauge, and is used to control the second electrode liquid level gauge to move up and down in the liquid level tube.

[0011] A preferred solution is that an activation tank vanadium concentration detection instrument is provided in the activation tank, and the activation tank vanadium concentration detection instrument is used to detect the vanadium concentration of the activation solution in the activation tank.

[0012] A preferred solution is that a drain pipe is also provided on the activation tank, and the drain pipe is connected to the activation tank; a drain control valve is provided on the drain pipe to control the opening and closing of the drain pipe to discharge the activation liquid cleanly.

[0013] The present application also provides a control method for a quantitative liquid discharge and liquid replenishment device for regenerating a waste catalyst, the method comprising the following steps:

[0014] Step 1, according to the production process requirements, the vanadium content in the initial activation solution of the activation tank is C0 mol / L, the length of the activation tank is a mm, the width is b mm, the initial volume is VL, and the concentration of the high-concentration activation solution is recorded as C1 mol / L;

[0015] Step 2: After the activation tank has finished impregnating the waste catalyst module, read the reading of the vanadium concentration detection instrument in the activation tank. The concentration of the activation liquid is recorded as C2 mol / L, and the volume of the activation tank is VL. To ensure that the liquid volume of the activation tank remains unchanged, the vanadium concentration of the activation liquid is restored to the initial concentration of the activation liquid C0 mol / L. The volume of the activated liquid discharged must be equal to the volume of the high-concentration activated liquid supplemented. The volume of the activated liquid after discharge V1, the liquid level hmm before the activation tank is discharged, and the liquid level Hmm after the activation tank is discharged are obtained, which are described by formulas (1), (2), and (3) respectively:

[0016]

[0017] Step 3: According to the liquid level H after the drainage, the controller controls the second telescopic control device to drive the second electrode liquid level gauge to move to the corresponding liquid level H;

[0018] Step 4, opening the liquid discharge control valve, and when the liquid in the liquid level tube is out of the second electrode liquid level meter, the controller controls the liquid discharge control valve to close to stop the liquid discharge;

[0019] Step 5: According to the liquid level h before the discharge, the controller controls the first telescopic control device to drive the first electrode liquid level gauge to move to the corresponding liquid level h;

[0020] Step 6, opening the liquid replenishment control valve, when the liquid in the liquid level tube contacts the first electrode liquid level meter, the controller controls the liquid replenishment control valve to close to stop liquid replenishment;

[0021] Step 7: After the drainage and replenishment are completed, the reading of the activation tank vanadium concentration detection instrument in the activation tank is read and recorded as the activation solution concentration C. 01 mol / L, and the deviation rate of the activation solution vanadium concentration after the first catalyst loading is obtained, which is described by formula (4):

[0022]

[0023] A preferred solution further includes the following steps:

[0024] Step 8: Repeat steps 2 to 7 based on the calculated volume of the activation solution after drainage and the liquid level of the activation tank before and after drainage. After drainage and refilling, read the reading of the vanadium concentration detection instrument in the activation tank. The concentration of the activation solution is recorded as C. 0n mol / L, the deviation rate of the activation solution vanadium concentration after the nth catalyst loading is β n , described by formula (5):

[0025]

[0026] Step 9: Calculate the average deviation rate of the vanadium concentration of the activation solution after n catalyst loadings based on the obtained vanadium concentration of the activation solution after n catalyst loadings. To determine the vanadium concentration deviation rate control range, it is described by formula (6):

[0027]

[0028] Beneficial effects:

[0029] In the present application, a quantitative drainage and replenishment control component is connected to the controlled activation tank to form a connector, and the liquid level of the quantitative drainage and replenishment control component is observed to determine the actual liquid level in the bubbling activation tank, thereby achieving precise quantitative drainage and replenishment; for changes in the concentration of the activation liquid caused by different batches of catalyst loads, the device and control method can be used to accurately calculate the volume of drainage and replenishment required according to the concentration of the activation liquid after activation through a controller, ensuring that the vanadium concentration of the activation liquid is restored to the original vanadium concentration of the activation liquid after the waste catalyst is loaded, solving the problem of changes in the concentration of the activation liquid caused by different batches of catalyst loads, thereby causing unqualified regenerated products, reducing the cost of regenerating waste catalysts, and improving work efficiency. It has the advantages of simple system structure, high control accuracy, and good operating stability, and can achieve variable volume precise replenishment and drainage control of the easily foaming activation liquid, ensuring the continuous and stable operation of the waste catalyst regeneration process and the quality of the regenerated products, and has good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of a quantitative liquid discharge and liquid replenishment device for regenerating a waste catalyst in this embodiment;

[0031] Figure 2 Schematic diagram of the modules of the controller and the connection operation station in this embodiment.

[0032] Figure numerals: 10, activation tank; 11, activation tank vanadium concentration detection instrument; 12, drain pipe; 121, drain control valve; 13, liquid filling port; 14, drain port; 15, drain port; 16, overflow port; 20, liquid filling assembly; 21, liquid filling pipe; 22, liquid filling vanadium concentration detection instrument; 23, liquid filling control valve; 30, liquid discharge assembly; 31, liquid discharge pipe; 32, liquid discharge control valve; 33, manual control valve; 40, quantitative liquid discharge and liquid filling control assembly; 41, liquid level pipe; 42, first electrode liquid level meter; 43, second electrode liquid level meter; 50, controller; 51, liquid filling control valve control signal; 52, first telescopic control device control signal ; 53. Second telescopic control device control signal; 54. Drain control valve control signal; 55. Drain control valve control signal; 56. First electrode liquid level gauge detection signal; 57. Second electrode liquid level gauge detection signal; 58. Replenishment vanadium concentration detection instrument detection signal; 59. Activation tank vanadium concentration detection instrument detection signal; 60. First telescopic control device; 61. First drive member; 62. First telescopic rod; 63. First detachable bracket; 70. Second telescopic control device; 71. Second drive member; 72. Second telescopic rod; 73. Second detachable bracket; 80. First fixed bracket; 90. Second fixed bracket; 100. Operation station. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present application in a schematic manner, and therefore the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] In the prior art, there are problems in that during the regeneration of waste denitration catalysts, the activation liquid is prone to foaming, making it difficult to accurately control the discharge and replenishment volumes, and the concentration of the activation liquid deviates from the original activation liquid concentration due to different catalyst loadings in different batches.

[0036] The embodiment of the present application provides a quantitative drainage and replenishment device and control method for regenerating waste catalysts, which has a simple structure and stable operation, can accurately control the drainage and replenishment volumes of the activation liquid, reduce the cost of regenerating waste catalysts, and has good economic benefits.

[0037] The following is a detailed description of a quantitative liquid discharge and liquid replenishment device for regenerating a waste catalyst provided in this embodiment in conjunction with the accompanying drawings. Figure 1 and Figure 2 As shown, the device includes an activation tank 10, a liquid replenishment component 20, a liquid discharge component 30, a quantitative liquid replenishment control component 40 and a controller 50. The activation tank 10 is used for wet impregnation of the waste catalyst module. The activation tank 10 can be a circular tank body, a square tank body, etc., and its material can be selected from corrosion-resistant materials such as stainless steel, PP, and carbon steel lining, so as to facilitate wet impregnation. A drain port 15 is provided on the bottom side wall of the activation tank 10, and a drain pipe 12 is connected to the drain port 15. The drain pipe 12 is connected to the activation tank 10. A drain control valve 121 is provided on the drain pipe 12, and the opening and closing of the drain control valve 121 is controlled to discharge the activation liquid. An overflow port 16 is also provided on the top side wall of the activation tank 10 to prevent the activation liquid in the activation tank 10 from being too full, and part of the liquid can be discharged from the overflow port 16.

[0038] The rehydration assembly 20 is connected to the activation tank 10 and is used to replenish the activation liquid. In one example, the rehydration assembly 20 includes a rehydration tube 21 and a rehydration vanadium concentration detection meter 22. The top side wall of the activation tank 10 is provided with a rehydration port 13, and the rehydration tube 21 is connected to the activation tank 10 at the position of the rehydration port 13, and the rehydration vanadium concentration detection meter 22 is provided on the rehydration tube 21; the rehydration tube 21 is also provided with a rehydration control valve 23, which is used to control the activation liquid to enter the activation tank 10 through the rehydration tube 21. Specifically, the activation tank 10 is connected to the rehydration control valve 23 and the rehydration tube 21 in sequence through a flange. When rehydration is needed, the rehydration control valve 23 is opened, and the activation liquid flows from the rehydration tube 21 into the activation tank 10, wherein the rehydration vanadium concentration detection meter 22 can detect the concentration of the inflowing activation liquid.

[0039] The drain assembly 30 is connected to the activation tank 10 and is used to discharge the activation liquid. In one example, the drain assembly 30 includes a drain pipe 31, a drain port 14 is provided on the bottom side wall of the activation tank 10, the drain pipe 31 is connected to the position of the drain port 14 and is connected to the activation tank 10, and the drain pipe 31 and the liquid replenishment pipe 21 are respectively arranged on opposite sides of the activation tank 10; a drain control valve 32 is provided on the drain pipe 31, which is used to control the activation liquid to be discharged from the activation tank 10 through the drain pipe 31. Specifically, the activation tank 10 is connected to the drain control valve 32 and the drain pipe 31 in sequence through a flange. When drainage is required, the drain control valve 32 is opened, and the activation liquid flows out of the activation tank 10 from the drain pipe 31. Preferably, a manual control valve 33 is also provided on the drain pipe 31, and the manual control valve 33 is located before the drain control valve 32.

[0040] The quantitative drainage and replenishment control component 40 is arranged on the drainage component 30, and the quantitative drainage and replenishment control component 40 and the controlled activation tank 10 form a coupling. In one example, the quantitative drainage and replenishment control component 40 includes a liquid level tube 41, which is arranged on the drainage pipe 31 and is located on the pipeline between the manual control valve 33 and the drainage control valve 32. The liquid level tube 41 is interconnected with the activation tank 10 through the drainage pipe 31, and the liquid level tube 41 and the activation tank 10 are parallel to each other, and the liquid level tube 41 and the controlled activation tank 10 form a coupling. Specifically, the liquid level tube 41 and the activation tank 10 form a U-shaped tube. According to the U-shaped tube principle, the liquid level in the activation tank 10 is equal to the liquid level height in the replenishment tube 21, which is convenient for the subsequent judgment of the liquid level height in the activation tank 10 according to the liquid level in the liquid level tube 41, so as to realize quantitative control of the activation liquid added to the activation tank 10. Preferably, the liquid level tube 41 can be a circular tube, a square tube, etc. The volume of liquid stored therein is very small relative to the activation tank 10 and can be ignored. The material thereof can be corrosion-resistant materials such as stainless steel, PP, carbon steel lining, etc., preferably 316 stainless steel.

[0041] In one example, a sensing element for sensing liquid levels of different heights is provided in the liquid level tube 41, and the sensing element is in communication connection with the controller 50; when the sensing element senses the liquid replenishment level, the controller 50 can control the opening and closing of the liquid replenishment control valve 23 to achieve quantitative liquid replenishment; when the sensing element senses the liquid discharge level, the controller 50 can control the opening and closing of the liquid discharge control valve 32 to achieve quantitative liquid discharge.

[0042] Specifically, the sensing element includes a first electrode level gauge 42 and a second electrode level gauge 43. The first electrode level gauge 42 and the second electrode level gauge 43 are respectively inserted into the level tube 41 from the top of the level tube 41, and a height difference is set between the first electrode level gauge 42 and the second electrode level gauge 43. The bottom end of the first electrode level gauge 42 is higher than the bottom end of the second electrode level gauge 43. In other words, the vertical height from the bottom end of the first electrode level gauge 42 to the drain pipe 31 is greater than the vertical height from the bottom end of the second electrode level gauge 43 to the drain pipe 31. The bottom end of the first electrode level gauge 42 is recorded as the replenishment level, and the bottom end of the second level gauge is recorded as the drainage level. During the replenishment process, when the liquid level in the level tube 41 reaches the replenishment level, that is, the liquid level rises and contacts the bottom end of the first electrode level gauge 42, the controller 50 controls the replenishment control valve 23 to close to achieve quantitative replenishment. During the liquid discharge process, when the liquid level in the liquid level tube 41 reaches the liquid discharge level, that is, the liquid level drops to contact the bottom end of the second electrode liquid level gauge 43, the controller 50 controls the liquid discharge control valve 32 to close to achieve quantitative liquid discharge.

[0043] In another example, a first telescopic control device 60 and a second telescopic control device 70 are arranged on both sides of the outside of the liquid level tube 41. The first telescopic control device 60 is connected to the first electrode liquid level gauge 42 and is used to control the first electrode liquid level gauge 42 to move up and down in the liquid level tube 41; the second telescopic control device 70 is connected to the second electrode liquid level gauge 43 and is used to control the second electrode liquid level gauge 43 to move up and down in the liquid level tube 41.

[0044] Specifically, the first telescopic control device 60 is fixedly connected to the side wall of the liquid level tube 41 through the first fixed bracket 80, and the first telescopic control device 60 includes a first telescopic rod 62 and a first driving member 61. The first driving member 61 is connected to the lower end of the first telescopic rod 62, and the upper end of the first telescopic rod 62 is detachably connected to the upper end of the first electrode liquid level gauge 42 through the first detachable bracket 63, and the extension and shortening of the first telescopic rod 62 can be controlled by the first driving member 61. The second telescopic control device 70 is fixedly connected to the side wall of the liquid level tube 41 through the second fixed bracket 90, and the second telescopic control device 70 includes a second telescopic rod 72 and a second driving member 71. The second driving member 71 is connected to the lower end of the second telescopic rod 72, and the upper end of the second telescopic rod 72 is detachably connected to the upper end of the second electrode liquid level gauge 43 through the second detachable bracket 73, and the extension and shortening of the second telescopic rod 72 can be controlled by the second driving member 71. The first drive member 61 and the second drive member 71 can adopt an electric drive mechanism, a pneumatic drive mechanism, or a hydraulic drive mechanism. Here, a servo motor or a stepper motor is adopted, and the control accuracy is less than or equal to 1 mm. By starting the first drive member 61 to control the first telescopic rod 62 to move up and down, the corresponding first electrode liquid level gauge 42 is driven to move up and down in the liquid level tube 41, so as to adjust the height of the liquid replenishment level as needed; by starting the second drive member 71 to control the second telescopic rod 72 to move up and down, the corresponding second electrode liquid level gauge 43 is driven to move up and down in the liquid level tube 41, so as to adjust the height of the liquid discharge level as needed.

[0045] In some embodiments, the controller 50 is respectively connected to the infusion assembly 20, the drainage assembly 30 and the quantitative drainage and infusion control assembly 40; when the liquid level in the quantitative drainage and infusion control assembly 40 reaches the infusion level, the controller 50 controls the infusion assembly 20 to stop infusion; when the liquid level in the quantitative drainage and infusion control assembly 40 reaches the drainage level, the controller 50 controls the drainage assembly 30 to stop drainage. Therefore, the infusion control valve control signal 51, the first telescopic control device control signal 52, the second telescopic control device control signal 53, the drainage control valve control signal 54, the drain control valve control signal 55, the first electrode liquid level meter detection signal 56, the second electrode liquid level meter detection signal 57, the infusion vanadium concentration detection instrument detection signal 58, and the activation tank vanadium concentration detection instrument detection signal 59 are all connected to the controller 50 (programmable controller) through a signal cable, and the controller 50 is connected to the operation station 100 through a communication cable.

[0046] Specifically, according to the situation that the liquid level of the activation tank 10 is always consistent with the liquid level of the liquid level tube 41 of the quantitative liquid discharge and replenishment component 20, when the liquid replenishment control valve 23 is opened, the high-concentration activation liquid starts to be replenished. The high-concentration activation liquid generates a large amount of foam in the activation tank 10 due to the impact of the liquid surface and air disturbance, which makes the liquid level uncontrollable. The liquid level in the liquid level tube 41 is not affected, and its liquid level can reflect the liquid level in the activation tank 10. Therefore, when the liquid in the liquid level tube 41 rises and contacts the first electrode liquid level gauge 42, the controller 50 receives a signal to control the liquid replenishment control valve 23 to automatically close and stop replenishment, thereby achieving precise liquid replenishment control; when the liquid discharge control valve 32 is opened, the activation liquid starts to be discharged. As the liquid in the liquid level tube 41 drops and contacts the second electrode liquid level gauge 43, the controller 50 receives a signal to control the liquid discharge control valve 32 to automatically close and stop discharge, thereby achieving precise liquid discharge control. In addition, the liquid replenishment control valve 23, the liquid discharge control valve 32 and the drain control valve 121 can be electric valves or pneumatic valves, and more preferably, pneumatic valves with fast switching speeds can be selected.

[0047] The activation tank 10 is also provided with an activation tank vanadium concentration detection instrument 11, through which the vanadium concentration of the activation liquid in the activation tank 10 can be detected, thereby providing data basis for subsequent adjustment of the liquid level height.

[0048] The implementation principle of the present application is as follows: a liquid level tube 41 is arranged on the drain pipe 31 of the activation tank 10, the liquid level tube 41 is connected with the activation tank 10 through the drain pipe 31, and the liquid level tube 41 and the controlled activation tank 10 form a connector, and the actual liquid level in the foaming activation tank 10 is determined by observing the liquid level in the liquid level tube 41, thereby realizing accurate quantitative liquid discharge and replenishment, reducing costs and improving work efficiency;

[0049] This application is different from the existing method of using magnetic flap liquid level control to replenish and drain liquid, which generates a lot of foam during the replenishment and drainage process, and the replenishment amount and the amount of replenishment are difficult to control. The device of the embodiment of the present application can not only be used for the precise quantitative control of the replenishment and drainage of the waste catalyst regeneration activation liquid, but also can be used for the precise quantitative addition and quantitative drainage of many different types of foaming solutions;

[0050] The present application is different from the existing fixed volume liquid discharge and liquid replenishment control method, and cannot solve the problem of different activation liquid concentration changes caused by different catalyst loads in different batches, which in turn causes unqualified regenerated products.

[0051] The device and control method of the embodiment of the present application can accurately calculate the volume of liquid required for drainage and replenishment according to the concentration of the activation liquid after activation, ensuring that the vanadium concentration of the activation liquid is restored to the original vanadium concentration of the activation liquid after loading the waste catalyst, and the average deviation rate of the cumulative vanadium concentration can be controlled below 5%.

[0052] The present application also provides a quantitative liquid discharge and liquid replenishment control method for regenerating a waste catalyst, the method comprising the following steps:

[0053] Step 1, according to the production process requirements, the vanadium content in the initial activation solution of the activation tank 10 is C0 mol / L, the length of the activation tank 10 is a mm, the width is b mm, the initial volume is VL, and the concentration of the high-concentration activation solution is recorded as C1 mol / L;

[0054] Step 2: After the activation tank 10 has finished impregnating the waste catalyst module, the reading of the activation tank vanadium concentration detection instrument 11 is read. The concentration of the activation liquid is recorded as C2 mol / L, and the volume of the activation tank 10 is VL. To ensure that the liquid volume of the activation tank 10 remains unchanged, the vanadium concentration of the activation liquid is restored to the initial activation liquid concentration C0 mol / L. The volume of the activated liquid discharged must be equal to the volume of the high-concentration activated liquid supplemented. The volume of the activated liquid after discharge V1, the liquid level hmm before the activation tank is discharged, and the liquid level Hmm after the activation tank is discharged are obtained, which are described by formulas (1), (2), and (3) respectively:

[0055]

[0056] Step 3: According to the liquid level Hmm obtained after the drainage, the controller 50 controls the second telescopic control device 70 to drive the second electrode liquid level gauge 43 to move to the corresponding liquid level H;

[0057] Step 4, opening the drain control valve 32, when the liquid in the liquid level tube 41 is separated from the second electrode liquid level gauge 43, the controller 50 controls the drain control valve 32 to close to stop draining;

[0058] Step 5: According to the liquid level hmm before the discharge, the controller 50 controls the first telescopic control device 60 to drive the first electrode liquid level gauge 42 to move to the corresponding liquid level h;

[0059] Step 6, opening the liquid replenishment control valve 23, when the liquid in the liquid level tube 41 contacts the first electrode liquid level gauge 42, the controller 50 controls the liquid replenishment control valve 23 to close to stop liquid replenishment;

[0060] Step 7: After the drainage and replenishment are completed, the reading of the activation tank vanadium concentration detection instrument 11 in the activation tank 10 is read and recorded as the activation solution concentration C 01 mol / L, and the deviation rate of the activation solution vanadium concentration after the first catalyst loading is obtained, which is described by formula (4):

[0061]

[0062] Step 8: Repeat steps 2 to 7 according to the calculated volume of the activation solution after drainage and the liquid level of the activation tank before and after drainage. After drainage and replenishment, read the reading of the vanadium concentration detection instrument 11 in the activation tank. The concentration of the activation solution is recorded as C. 0n mol / L, the deviation rate of the activation solution vanadium concentration after the nth catalyst loading is β n , described by formula (5):

[0063]

[0064] Step 9: Calculate the average deviation rate of the vanadium concentration of the activation solution after n catalyst loadings based on the obtained vanadium concentration of the activation solution after n catalyst loadings. To determine the vanadium concentration deviation rate control range, it is described by formula (6):

[0065]

[0066] The effects of the embodiments of the present application are further illustrated below through Examples 1-4.

[0067] Example 1

[0068] Step 1: According to the production process requirements, the vanadium content in the initial activation solution of the activation tank is 0.025 mol / L, the activation tank is 2100 mm long, 1130 mm wide, the initial volume is 3500 L, the concentration of the high-concentration activation solution is 0.15 mol / L, the theoretical vanadium loading capacity of a single module is 17.4 mol, and the wet loading method is adopted, and only one loading is performed. The implementation goal is to control the concentration of the activation solution at 0.025 mol / L after the module is loaded and drained and replenished, and the vanadium concentration deviation rate is controlled below 5%.

[0069] Step 2. After the activation tank has impregnated one waste catalyst module, read the reading of the activation tank vanadium concentration detection instrument. The concentration of the activation liquid is 0.02 mol / L. The volume of the activation liquid after drainage can be calculated to be 3365 L. The liquid level of the activation tank before drainage is 1475 mm, and the liquid level after drainage is 1418 mm.

[0070] Step 3, according to the activation liquid level height 1418 mm after the drainage, the controller 50 controls the second telescopic control device 70 to drive the second electrode liquid level gauge 43 to move to the corresponding liquid level 1418 mm;

[0071] Step 4: Open the drain control valve 32. When the liquid in the liquid level tube 41 is separated from the second electrode liquid level gauge 43, the controller 50 controls the drain control valve 32 to close to stop draining.

[0072] Step 5: According to the activation liquid level height of 1475 mm before the drainage, the controller 50 controls the first telescopic control device 60 to drive the first electrode liquid level gauge 42 to move to the corresponding liquid level of 1475 mm;

[0073] Step 6, opening the liquid replenishment control valve 23, when the liquid in the liquid level tube 41 contacts the first electrode liquid level gauge 42, the controller 50 controls the liquid replenishment control valve 23 to close to stop liquid replenishment;

[0074] Step 7, after the drainage and replenishment are completed, the reading of the activation tank vanadium concentration detection instrument 11 is read, and the activation solution concentration is 0.0254 mol / L. Based on this calculation, the vanadium concentration control deviation rate is 1.6%, which is below the vanadium concentration deviation rate control range of 5%.

[0075] Example 2

[0076] Step 1: Set the given conditions to be the same as in Example 1, the theoretical loading amount of module vanadium is 19.6 mol, and the wet loading method is adopted. The implementation target is to control the concentration of the activation solution after module loading, drainage and rehydration to 0.025 mol / L, and the vanadium concentration deviation rate is controlled below 5%.

[0077] Step 2, after the activation tank has impregnated one waste catalyst module, the reading of the activation tank vanadium concentration detection instrument is read, and the concentration of the activation solution is 0.0194 mol / L. It can be calculated that the volume of the activation solution after drainage is 3350L, the liquid level of the activation tank before drainage is 1475mm, and the liquid level after drainage is 1412mm;

[0078] Step 3, according to the obtained activation liquid level height of 1412 mm after drainage, the controller 50 controls the second telescopic control device 70 to drive the second electrode liquid level gauge 43 to move to the corresponding liquid level 1412 mm;

[0079] Step 4, opening the drain control valve 32, when the liquid in the liquid level tube 41 is separated from the second electrode liquid level gauge 43, the controller 50 controls the drain control valve 32 to close to stop draining;

[0080] Step 5: According to the activation liquid level height of 1475 mm before the drainage, the controller 50 controls the first telescopic control device 60 to drive the first electrode liquid level gauge 42 to move to the corresponding liquid level of 1475 mm;

[0081] Step 6, opening the liquid replenishment control valve 23, when the liquid in the liquid level tube 41 contacts the first electrode liquid level gauge 42, the controller 50 controls the liquid replenishment control valve 23 to close to stop liquid replenishment;

[0082] Step 7, after the drainage and replenishment are completed, the reading of the vanadium concentration detection instrument of the activation tank is read, and the concentration of the activation solution is 0.0256 mol / L. Based on this calculation, the vanadium concentration control deviation rate is 2.4%, which is below the vanadium concentration deviation rate control range of 5%.

[0083] Example 3

[0084] Step 1, setting the given conditions as compared with Example 1, increasing the number of load modules, comparing the cumulative deviation values, and implementing the goal of controlling the concentration of the activation solution after module loading, drainage and rehydration to 0.025 mol / L, and controlling the average deviation rate of the cumulative vanadium concentration to less than 5%;

[0085] Step 2, when the activation tank has finished impregnating one waste catalyst module, read the reading of the activation tank vanadium concentration detection instrument, the activation solution concentration is 0.02 mol / L, and the volume of the activation solution after drainage can be calculated to be 3365L, the liquid level of the activation tank before drainage is 1475mm, and the liquid level after drainage is 1418mm;

[0086] Step 3, according to the activation liquid level height 1418 mm after the drainage, the controller 50 controls the second telescopic control device 70 to drive the second electrode liquid level gauge 43 to move to the corresponding liquid level 1418 mm;

[0087] Step 4, opening the drain control valve 32, when the liquid in the liquid level tube 41 is separated from the second electrode liquid level gauge 43, the controller 50 controls the drain control valve 32 to close to stop draining;

[0088] Step 5: According to the activation liquid level height of 1475 mm before the drainage, the controller 50 controls the first telescopic control device 60 to drive the first electrode liquid level gauge 42 to move to the corresponding liquid level of 1475 mm;

[0089] Step 6, opening the liquid replenishment control valve 23, when the liquid in the liquid level tube 41 contacts the first electrode liquid level gauge 42, the controller 50 controls the liquid replenishment control valve 23 to close to stop liquid replenishment;

[0090] Step 7, after the drainage and replenishment are completed, the reading of the activation tank vanadium concentration detection instrument 11 is read, and the activation solution concentration is 0.0254 mol / L. Based on this calculation, the vanadium concentration control deviation rate is 1.6%, which is below the vanadium concentration deviation rate control range of 5%;

[0091] Step 8, repeating step 1, when the activation tank 10 has impregnated two waste catalyst modules, the concentration measured by the activation tank vanadium concentration detection instrument 11 is 0.0210 mol / L, and the volume of the activation liquid after drainage can be calculated to be 3391 L, the liquid level of the activation tank 10 before drainage is 1475 mm, and the liquid level after drainage is 1429 mm;

[0092] Step 9: Calculate the result according to step 8 and repeat steps 3 to 6;

[0093] Step 10, repeating step 7, reading the reading of the activation tank vanadium concentration detection instrument 11, the activation solution concentration is 0.0249 mol / L, and thus calculated, the vanadium concentration control deviation rate of this method is 0.4%;

[0094] Step 11, repeating step 2, when the activation tank 10 has impregnated three waste catalyst modules, the concentration measured by the activation tank vanadium concentration detection instrument 11 is 0.0198 mol / L, and the volume of the activation liquid after drainage can be calculated to be 3360 L, the liquid level of the activation tank 10 before drainage is 1475 mm, and the liquid level after drainage is 1416 mm;

[0095] Step 12: Calculate the result according to step 11 and repeat steps 3 to 6;

[0096] Step 13, repeating step 7, reading the reading of the activation tank vanadium concentration detection instrument 11, the activation solution concentration is 0.0255 mol / L, and thus calculated, the vanadium concentration control deviation rate of this method is 2.0%;

[0097] Step 14: Calculate the average deviation rate of the vanadium concentration of the activation solution after the three catalyst loadings based on the obtained vanadium concentration of the activation solution after the three catalyst loadings. The value is 1.33%, which is below 5% in the control range of the cumulative vanadium concentration deviation rate.

[0098] Example 4

[0099] Step 1, setting the given condition to a high concentration activation solution concentration of 0.2 mol / L, and the rest is the same as in Example 1; the implementation goal is to control the activation solution concentration at 0.025 mol / L after module loading and drainage and rehydration, and the vanadium concentration deviation rate is controlled below 5%;

[0100] Step 2, when the activation tank 10 has finished impregnating one waste catalyst module, the reading of the activation tank vanadium concentration detection instrument 11 is read, and the concentration of the activation solution is 0.02 mol / L. The volume of the activation solution after drainage can be calculated to be 3403 L, the liquid level of the activation tank 10 before drainage is 1475 mm, and the liquid level after drainage is 1434 mm;

[0101] Step 3, according to the obtained activation liquid level height of 1434 mm after drainage, the controller 50 controls the second telescopic control device 70 to drive the second electrode liquid level gauge 43 to move to the corresponding liquid level 1434 mm;

[0102] Step 4, opening the drain control valve 32, when the liquid in the liquid level tube 41 is separated from the second electrode liquid level gauge 43, the controller 50 controls the drain control valve 32 to close to stop draining;

[0103] Step 5: According to the activation liquid level height of 1475 mm before the drainage, the controller 50 controls the first telescopic control device 60 to drive the first electrode liquid level gauge 42 to move to the corresponding liquid level of 1475 mm;

[0104] Step 6, opening the liquid replenishment control valve 23, when the liquid in the liquid level tube 41 contacts the first electrode liquid level gauge 42, the controller 50 controls the liquid replenishment control valve 23 to close to stop liquid replenishment;

[0105] Step 7, after the drainage and replenishment are completed, the reading of the activation tank vanadium concentration detection instrument 11 is read, and the activation solution concentration is 0.0258 mol / L. Based on this calculation, the vanadium concentration control deviation rate is 3.2%, which is below the vanadium concentration deviation rate control range of 5%.

[0106] According to Examples 1 to 4, it can be found that the concentration of the activation liquid changes due to different catalyst loads in different batches. The device and control method can accurately calculate the volume of the required drainage and replenishment according to the concentration of the activation liquid after activation, ensuring that the vanadium concentration of the activation liquid is restored to the original vanadium concentration of the activation liquid after the waste catalyst is loaded. The average deviation rate of the cumulative vanadium concentration can be controlled below 5%, which solves the problem of changes in the concentration of the activation liquid caused by different catalyst loads in different batches, thereby causing unqualified regenerated products, reducing the cost of regenerating waste catalysts and improving work efficiency.

[0107] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A quantitative liquid discharge and liquid replenishment device for regenerating waste catalysts, characterized in that: include: An activation tank (10), wherein the activation tank (10) is used for wet impregnation of the waste catalyst module; A liquid replenishing component (20), the liquid replenishing component (20) being in communication with the activation tank (10) and being used for replenishing the activation liquid; a liquid discharge component (30), the liquid discharge component (30) being in communication with the activation tank (10) and being used for discharging the activation liquid; A quantitative drainage and replenishment control component (40), wherein the quantitative drainage and replenishment control component (40) is arranged on the drainage component (30), and the quantitative drainage and replenishment control component (40) and the activated tank (10) to be controlled form a connector; A controller (50), the controller (50) being communicatively connected with the fluid replenishment component (20), the fluid discharge component (30) and the quantitative fluid discharge and replenishment control component (40) respectively; During fluid replenishment, when the liquid level in the quantitative fluid replenishment control component (40) reaches the fluid replenishment level, the controller (50) controls the fluid replenishment component (20) to stop fluid replenishment; During liquid discharge, when the liquid level in the quantitative liquid discharge and replenishment control component (40) reaches the liquid discharge level, the controller (50) controls the liquid discharge component (30) to stop liquid discharge.

2. The device according to claim 1, characterized in that The liquid replenishment component (20) comprises a liquid replenishment tube (21) and a liquid replenishment vanadium concentration detection instrument (22); The liquid replenishment pipe (21) is connected to the activation tank (10), and the liquid replenishment vanadium concentration detection instrument (22) is arranged on the liquid replenishment pipe (21); The liquid replenishment pipe (21) is also provided with a liquid replenishment control valve (23) for controlling the activation liquid to enter the activation tank (10) through the liquid replenishment pipe (21).

3. The device according to claim 2, characterized in that The liquid discharge assembly (30) comprises a liquid discharge pipe (31), and the liquid discharge pipe (31) is connected to the activation tank (10); The liquid discharge pipe (31) is provided with a liquid discharge control valve (32) for controlling the activation liquid to be discharged from the activation tank (10) through the liquid discharge pipe (31).

4. The device according to claim 3, characterized in that The quantitative liquid discharge and replenishment control component (40) comprises a liquid level pipe (41), the liquid level pipe (41) is arranged on the liquid discharge pipe (31) and is interconnected, the liquid level pipe (41) and the activation tank (10) are parallel to each other, and the liquid level pipe (41) and the activated tank (10) to be controlled form a connector; The liquid level pipe (41) is provided with a sensing element for sensing liquid levels of different heights, and the sensing element is communicatively connected with the controller (50); When the sensing element senses the liquid replenishment level, the controller (50) can control the liquid replenishment control valve (23) to open or close to achieve quantitative liquid replenishment; When the sensing element senses the liquid discharge level, the controller (50) can control the liquid discharge control valve (32) to open or close to achieve quantitative liquid discharge.

5. The device according to claim 4, characterized in that The sensing element comprises a first electrode liquid level gauge (42) and a second electrode liquid level gauge (43); The first electrode liquid level gauge (42) and the second electrode liquid level gauge (43) are provided with a height difference; The first electrode liquid level meter (42) is used to sense the liquid replenishment level in the liquid level tube (41); The second electrode liquid level meter (43) is used to sense the discharge level in the liquid level tube (41).

6. The device according to claim 5, characterized in that A first telescopic control device (60) and a second telescopic control device (70) are provided on both sides of the outside of the liquid level tube (41); the first telescopic control device (60) is connected to the first electrode liquid level gauge (42) and is used to control the first electrode liquid level gauge (42) to move up and down in the liquid level tube (41); the second telescopic control device (70) is connected to the second electrode liquid level gauge (43) and is used to control the second electrode liquid level gauge (43) to move up and down in the liquid level tube (41).

7. The device according to claim 1, characterized in that An activation tank vanadium concentration detection instrument (11) is provided in the activation tank (10), and the activation tank vanadium concentration detection instrument (11) is used to detect the vanadium concentration of the activation solution in the activation tank (10).

8. The device according to claim 1, characterized in that The activation tank (10) is also provided with a drain pipe (12), and the drain pipe (12) is connected to the activation tank (10); The drain pipe (12) is provided with a drain control valve (121) for controlling the opening and closing of the drain pipe (12) to drain the activation liquid completely.

9. A control method for a quantitative liquid discharge and liquid replenishment device for regenerating a waste catalyst according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: Step 1, according to the production process requirements, the vanadium content in the initial activation solution of the activation tank (10) is C0 mol / L, the length of the activation tank (10) is a mm, the width is b mm, the initial volume is VL, and the concentration of the high-concentration activation solution is recorded as C1 mol / L; Step 2: After the activation tank (10) has been impregnated with the waste catalyst module, the reading of the activation tank vanadium concentration detection instrument (11) is read. The activation liquid concentration is recorded as C2 mol / L, and the volume of the activation tank (10) is VL. To ensure that the liquid volume of the activation tank (10) remains unchanged, the vanadium concentration of the activation liquid is restored to the initial activation liquid concentration C0 mol / L. The volume of the activated liquid discharged must be equal to the volume of the high-concentration activated liquid supplemented. The volume V1 of the activated liquid after discharge, the liquid level hmm of the activation tank (10) before discharge, and the liquid level Hmm of the activation tank (10) after discharge are obtained, which are described by formulas (1), (2), and (3) respectively: Step 3: According to the liquid level H obtained after the drainage, the controller (50) controls the second telescopic control device (70) to drive the second electrode liquid level gauge (43) to move to the corresponding liquid level H; Step 4, opening the liquid discharge control valve (32), and when the liquid in the liquid level pipe (41) is separated from the second electrode liquid level gauge (43), the controller (50) controls the liquid discharge control valve (32) to close to stop the liquid discharge; Step 5: Based on the liquid level h obtained before the discharge, the controller (50) controls the first telescopic control device (60) to drive the first electrode liquid level gauge (42) to move to the corresponding liquid level h; Step 6, opening the liquid replenishment control valve (23), when the liquid in the liquid level tube (41) contacts the first electrode liquid level gauge (42), the controller (50) controls the liquid replenishment control valve (23) to close to stop liquid replenishment; Step 7: After the drainage and replenishment are completed, the reading of the activation tank vanadium concentration detection instrument (11) in the activation tank (10) is read and recorded as the activation solution concentration C. 01 mol / L, and the deviation rate of the activation solution vanadium concentration after the first catalyst loading is obtained, which is described by formula (4):

10. The method according to claim 9, characterized in that The method further comprises the steps of: Step 8: Repeat steps 2 to 7 based on the calculated volume of the activation solution after drainage and the liquid level of the activation tank before and after drainage. After drainage and replenishment, read the reading of the vanadium concentration detection instrument (11) in the activation tank, and record the concentration of the activation solution as C. 0n mol / L, the deviation rate of the activation solution vanadium concentration after the nth catalyst loading is β n , described by formula (5): Step 9: Calculate the average deviation rate of the vanadium concentration of the activation solution after n catalyst loadings based on the obtained vanadium concentration of the activation solution after n catalyst loadings. To determine the vanadium concentration deviation rate control range, it is described by formula (6):

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