Resin regeneration waste liquid treatment and recovery system and control method thereof

Abstract

The invention relates to a resin regeneration waste liquid treatment and recovery system and a control method thereof, and relates to the technical field of waste liquid treatment.The control method comprises the following steps that S1, parameters are set; s2, the liquid discharging assembly is adjusted to be in a stop state; s3, detecting the pH value in the neutralization water tank; s4, if the pH value in the neutralization water tank is qualified, performing the step S5; if the pH value in the neutralization water tank is not qualified, the step S8 is carried out; s5, draining water from the neutralization water tank; s6, the pH value in the waste liquid outlet pipe is detected; s7, if the pH value in the wastewater outlet pipe is qualified, performing the step S8; if the pH value in the wastewater outlet pipe is not qualified, reporting an error, and carrying out the step S2; s8, detecting the pH value in the waste liquid inlet pipe; and S9, carrying out acid-base neutralization in the neutralization water tank, and carrying out the step S2. The device has the effects that acid liquor or alkali liquor is added in time, and the labor intensity in the waste liquor acid-base neutralization process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid treatment, and in particular to a resin regeneration waste liquid treatment and recovery system and a control method thereof. Background Art

[0002] Boiler, electronics, chemical, food and other industries usually use resin exchange technology to obtain softened water. However, after the resin is saturated after a certain period of time, it is necessary to regenerate the resin. Since the regeneration waste liquid generated during the resin regeneration process will pollute the environment if it is directly discarded, the resin regeneration waste liquid needs to be neutralized with acid and alkali before being discharged.

[0003] At present, during the resin waste liquid treatment process, acid or alkali is added to the waste liquid manually. Since the concentration and flow of the waste liquid are unstable, in order to ensure a higher degree of accuracy in the control of the waste liquid pH, the staff needs to pay attention to the waste liquid pH at all times, so as to achieve the effect of timely addition of acid or alkali, resulting in high labor intensity in the waste liquid acid-base neutralization process. Summary of the invention

[0004] In order to timely add acid or alkali solution and reduce the labor intensity of the waste liquid acid-base neutralization process, the present application provides a resin regeneration waste liquid treatment and recovery system and a control method thereof.

[0005] The present application provides a resin regeneration waste liquid treatment and recovery system control method using the following technical solutions: A resin regeneration waste liquid treatment and recovery system control method comprises the following steps: S1, set the first acidity threshold; set the first alkalinity threshold; set the second acidity threshold; set the second alkalinity threshold; set the third acidity threshold; set the third alkalinity threshold; set the highest liquid level threshold; set the lowest liquid level threshold; set the drainage delay time T1; set the stirring delay time T2; S2, adjusting the discharge assembly to a stopped state; S3, a second acid-base measuring instrument detects the pH value in the neutralization pool; S4, if the pH value in the neutralization pool is qualified, proceed to step S5; if the pH value in the neutralization pool is unqualified, proceed to step S8; S5, neutralize the water tank for drainage; S6, the third acid-base measuring instrument detects the pH value in the waste liquid outlet pipe; S7, if the pH value of the wastewater outlet pipe is qualified, proceed to step S8; if the pH value of the wastewater outlet pipe is unqualified, an error is reported and step S2 is performed; S8, a first acid-base measuring instrument detects the pH value of the waste liquid inlet pipe; S9, neutralize the acid and alkali in the neutralization tank and proceed to step S2.

[0006] Preferably, step S5 comprises the following steps: S51, adjusting the acid solution component and the alkali solution component to a stopped state, and adjusting the stirring component to a stopped state after waiting for a stirring delay time T2; S52, the liquid level meter detects the height value of the neutralization pool liquid level; S53, if the liquid level count value is less than the minimum liquid level threshold, proceed to step S2; if the liquid level count value is greater than the maximum liquid level threshold, the drain component is opened, and after waiting for the drainage delay time T1, proceed to step S6.

[0007] Preferably, the step S9 comprises the following steps: S91, the acid liquid component is started, and step S93 is performed; S92, the alkali solution component is started, and step S93 is performed; S93, the stirring component is started and step S2 is performed.

[0008] Preferably, step S8 comprises the following steps: S81, a first acid-base measuring instrument detects the pH value of the waste liquid inlet pipe; S82, if the value of the first acid-base measuring instrument is greater than the first acidity threshold, proceed to step S91; if the value of the first acid-base measuring instrument is less than the first acidity threshold, proceed to step S93; S83, a first acid-base measuring instrument detects the pH value in the waste liquid inlet pipe; S84, if the value of the first acid-base measuring instrument is less than the first alkalinity threshold, proceed to step S92; if the value of the first acid-base measuring instrument is greater than the first alkalinity threshold, proceed to step S93; S85, a first acid-base measuring instrument detects the pH value in the waste liquid inlet pipe; S86. If the value of the first acid-base measuring instrument is greater than the first alkalinity threshold, proceed to step S91; if the value of the first acid-base measuring instrument is less than the first acidity threshold, proceed to step S92; if the value of the first acid-base measuring instrument is between the first acidity threshold and the first alkalinity threshold, proceed to step S3.

[0009] Preferably, step S4 includes the following steps: if the value of the second acid-base measuring instrument is between the second acidity threshold and the second alkalinity threshold, proceed to step S5; if the value of the second acid-base measuring instrument is greater than the second alkalinity threshold, proceed to step S81; if the value of the second acid-base measuring instrument is less than the second acidity threshold, proceed to step S83.

[0010] Preferably, the step S7 includes the following steps: the step S7 includes the following steps: if the value of the third acid-base measuring instrument is between the third acidity threshold and the third alkalinity threshold, proceed to step S85; if the value of the third acid-base measuring instrument is greater than the third alkalinity threshold, report an error and proceed to step S2; if the value of the third acid-base measuring instrument is less than the third acidity threshold, report an error and proceed to step S2.

[0011] The present application provides a resin regeneration waste liquid treatment and recovery system that adopts the following technical solutions: A resin regeneration waste liquid treatment and recovery system comprises a neutralization water tank, wherein a waste liquid inlet pipe and a waste liquid outlet pipe are connected to the neutralization water tank, a liquid level gauge is arranged on the neutralization water tank, a drainage component is arranged between the waste liquid outlet pipe and the neutralization water tank, the drainage component is used to guide the liquid in the neutralization water tank into the waste liquid outlet pipe, a first acid-base measuring instrument is arranged on the waste liquid inlet pipe, a second acid-base measuring instrument is arranged on the neutralization water tank, a third acid-base measuring instrument is arranged on the waste liquid outlet pipe, an acid component and an alkali component are connected to the neutralization water tank, the acid component is used to inject acid into the neutralization water tank, the alkali component is used to inject alkali into the neutralization water tank, and a stirring component is arranged on the neutralization water tank, the stirring component is used to stir the liquid in the neutralization water tank.

[0012] Preferably, the stirring assembly includes a Roots blower and an air outlet pipe, one end of the air outlet pipe is located in the neutralization water tank, the other end of the air outlet pipe is located outside the neutralization water tank, and the outlet branch pipe is located outside the neutralization water tank and is connected to the air outlet end of the Roots blower.

[0013] Preferably, the drainage assembly includes a drainage pump 1, a drainage pump 2, a waste liquid branch pipe 1 and a waste liquid branch pipe 2, the input end of the drainage pump 1 and the input end of the drainage pump 2 are both interconnected with the neutralization water tank, the waste liquid branch pipe 1 is connected and arranged between the output end of the drainage pump 1 and the waste liquid outlet pipe, and the waste liquid branch pipe 2 is connected and arranged between the output end of the drainage pump 2 and the waste liquid outlet pipe.

[0014] Preferably, the acid liquid component comprises an acid liquid inlet pipe, an acid adding pump and an acid liquid tank, one end of the acid liquid inlet pipe is interconnected with the neutralization water tank, the other end of the acid liquid inlet pipe is interconnected with the output end of the acid adding pump, and the input end of the acid adding pump is interconnected with the acid liquid tank; the alkali liquid component comprises an alkali liquid inlet pipe, an alkali adding pump and an alkali liquid tank, one end of the alkali liquid inlet pipe is interconnected with the neutralization water tank, the other end of the alkali liquid inlet pipe is interconnected with the output end of the alkali adding pump, and the input end of the alkali adding pump is interconnected with the alkali liquid tank.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. According to the liquid level height in the neutralization pool, the pH value in the neutralization pool, the pH value in the waste liquid inlet pipe and the pH value in the waste liquid outlet pipe, the acid pump, alkali pump, drainage pump 1 and drainage pump 2 are automatically started and stopped dynamically, reducing the need for staff to always pay attention to the pH value of the waste liquid, while achieving the effect of timely addition of acid or alkali solution, reducing the labor intensity of the waste liquid acid-base neutralization process; 2. By setting up the Roots blower and the air outlet pipe, the liquid in the neutralization pool can be stirred, the mixing rate of the liquid in the neutralization pool can be accelerated, and the acid-base neutralization of the liquid in the neutralization pool can be quickly carried out; 3. By setting up drainage pump 1, drainage pump 2, waste liquid branch pipe 1 and waste liquid branch pipe 2, drainage pump 1 and drainage pump 2 are used as a backup, which facilitates the discharge of liquid inside the neutralization pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a resin regeneration waste liquid treatment and recovery system in an embodiment of the present application.

[0017] Figure 2 It is a flow chart of a control method of a resin regeneration waste liquid treatment and recovery system in an embodiment of the present application.

[0018] Figure 3 This is a flow chart for controlling the start and stop of drainage pump 1 and drainage pump 2 in an embodiment of the present application.

[0019] Explanation of the reference numerals: 1. waste liquid inlet pipe; 11. first acid-base measuring instrument; 2. neutralization water tank; 21. second acid-base measuring instrument; 3. waste liquid outlet pipe; 31. third acid-base measuring instrument; 4. liquid level gauge; 5. drainage assembly; 51. drainage pump one; 52. drainage pump two; 53. waste liquid branch pipe one; 54. waste liquid branch pipe two; 6. acid assembly; 61. acid inlet pipe; 62. acid adding pump; 63. acid tank; 7. alkali assembly; 71. alkali inlet pipe; 72. alkali adding pump; 73. alkali tank; 8. stirring assembly; 81. Roots blower; 82. air outlet pipe. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-3 This application is described in further detail.

[0021] The present application discloses a resin regeneration waste liquid treatment and recovery system. Figure 1, including a neutralization pool 2, on which a waste liquid inlet pipe 1 and a waste liquid outlet pipe 3 are connected. A liquid level meter 4 is installed on the neutralization pool 2, and the liquid level meter 4 is used to detect the liquid level in the neutralization pool 2. A first acid-base measuring instrument 11 is installed on the waste liquid inlet pipe 1, and the first acid-base measuring instrument 11 is used to detect the acidity and alkalinity of the liquid in the waste liquid inlet pipe 1; a second acid-base measuring instrument 21 is installed on the neutralization pool 2, and the second acid-base measuring instrument 21 is used to detect the acidity and alkalinity of the liquid in the neutralization pool 2; a third acid-base measuring instrument 31 is installed on the waste liquid outlet pipe 3, and the third acid-base measuring instrument 31 is used to detect the acidity and alkalinity of the liquid in the waste liquid outlet pipe 3.

[0022] Reference Figure 1 A drainage assembly 5 is installed between the waste liquid outlet pipe 3 and the neutralization pool 2. The drainage assembly 5 is used to guide the liquid in the neutralization pool 2 into the waste liquid outlet pipe 3. The drainage assembly 5 includes a drainage pump 1 51, a drainage pump 2 52, a waste liquid branch pipe 1 53 and a waste liquid branch pipe 2 54. The input end of the drainage pump 1 51 and the input end of the drainage pump 2 52 are both connected to the neutralization pool 2. The waste liquid branch pipe 1 53 is connected and arranged between the output end of the drainage pump 1 51 and the waste liquid outlet pipe 3. The waste liquid branch pipe 2 54 is connected and arranged between the output end of the drainage pump 2 52 and the waste liquid outlet pipe 3. When the pH value in the neutralization pool 2 is between 6 and 9, and the liquid level in the neutralization pool 2 is higher than 3 meters, the drainage pump 1 51 or the drainage pump 2 52 is started. When the liquid level in the neutralization pool 2 is lower than 1 meter, the drainage pump 1 51 and the drainage pump 2 52 are stopped. When the pH value of the wastewater outlet pipe is lower than 6 or higher than 9, the drainage pump 1 51 and the drainage pump 2 52 stop.

[0023] Reference Figure 1 , an acid liquid assembly 6 is installed on the neutralization water pool 2, and the acid liquid assembly 6 is used to inject acid liquid into the neutralization water pool 2. The acid liquid assembly 6 comprises an acid liquid inlet pipe 61, an acid adding pump 62 and an acid liquid tank 63, one end of the acid liquid inlet pipe 61 is interconnected with the neutralization water pool 2, the other end of the acid liquid inlet pipe 61 is interconnected with the output end of the acid adding pump 62, and the input end of the acid adding pump 62 is interconnected with the acid liquid tank 63.

[0024] Reference Figure 1 The alkali liquid component 7 is installed on the neutralization pool 2, and the alkali liquid component 7 is used to inject alkali liquid into the neutralization pool 2. The alkali liquid component 7 includes an alkali liquid inlet pipe 71, an alkali adding pump 72 and an alkali liquid tank 73, one end of the alkali liquid inlet pipe 71 is interconnected with the neutralization pool 2, the other end of the alkali liquid inlet pipe 71 is interconnected with the output end of the alkali adding pump 72, and the input end of the alkali adding pump 72 is interconnected with the alkali liquid tank 73.

[0025] Reference Figure 1, a stirring assembly 8 is installed on the neutralization pool 2, and the stirring assembly 8 is used to stir the liquid in the neutralization pool 2. The stirring assembly 8 includes a Roots blower 81 and an air outlet pipe 82, one end of the air outlet pipe 82 is located in the neutralization pool 2, and the other end of the air outlet pipe 82 is located outside the neutralization pool 2, and the outlet branch pipe is located outside the neutralization pool 2 and is interconnected with the air outlet end of the Roots blower 81. After the Roots blower 81 is started, air is blown into the neutralization pool 2 to achieve the effect of stirring the liquid inside the neutralization pool 2, accelerate the mixing rate of the liquid inside the neutralization pool 2, and facilitate the rapid acid-base neutralization of the liquid inside the neutralization pool 2. When the acid pump 62 or the alkali pump 72 stops for 5 minutes, the Roots blower 81 stops running.

[0026] The implementation principle of a resin regeneration waste liquid treatment and recovery system in an embodiment of the present application is: when the waste liquid is discharged into the neutralization water tank 2 from the waste liquid inlet pipe 1, the first acid-base measuring instrument 11 detects the pH value in the waste liquid inlet pipe 1, and the second acid-base measuring instrument 21 detects the pH value in the neutralization water tank 2.

[0027] When the pH value in the neutralization tank 2 is greater than 9 and the pH value in the wastewater inlet pipe is greater than 6, the acid adding pump 62 starts to add acid into the neutralization tank 2; when the pH value in the neutralization tank 2 is greater than 9 and the pH value in the wastewater inlet pipe is less than 6, the waste liquid in the wastewater inlet pipe is neutralized with the waste liquid in the neutralization tank 2.

[0028] When the pH value in the neutralization tank 2 is less than 6 and the pH value in the wastewater inlet pipe is less than 9, the alkali adding pump 72 starts to add alkali solution into the neutralization tank 2; when the pH value in the neutralization tank 2 is less than 6 and the pH value in the wastewater inlet pipe is greater than 9, the waste liquid in the wastewater inlet pipe is neutralized with the waste liquid in the neutralization tank 2.

[0029] When the pH value in the neutralization tank 2 is between 6-9, and the pH value of the waste liquid inlet pipe 1 is greater than 9, the acid pump 62 is started. When the pH value in the neutralization tank 2 is between 6-9, and the pH value of the waste liquid inlet pipe 1 is less than 6, the alkali pump 72 is started. When the pH value in the neutralization tank 2 is between 6-9, and the pH value of the waste liquid inlet pipe 1 is between 6-9, the alkali pump 72 and the acid pump 62 are stopped. When no liquid in the waste liquid inlet pipe 1 is discharged into the neutralization tank 2, and the pH value in the neutralization tank 2 is between 6-9, the acid pump 62 and the alkali pump 72 are stopped.

[0030] When the pH value in the neutralization pool 2 is between 6 and 9, and the liquid level in the neutralization pool 2 is higher than 3 meters, the drainage pump 1 51 or the drainage pump 2 52 is started to discharge the waste liquid in the neutralization pool 2 that meets the pH discharge requirements through the waste liquid outlet pipe 3. When the liquid level in the neutralization pool 2 is lower than 1 meter, the drainage pump 1 51 and the drainage pump 2 52 stop running.

[0031] When the waste liquid is discharged from the waste liquid outlet pipe 3, the third acid-base measuring instrument 31 detects the pH value in the waste liquid outlet pipe 3. When the pH value in the waste liquid outlet pipe 3 is between 6 and 9, the drainage pump 1 51 and the drainage pump 2 52 operate normally; when the pH value in the waste liquid outlet pipe 3 is lower than 6 or higher than 9, the drainage pump 1 51 and the drainage pump 2 52 stop operating and report an error.

[0032] According to the liquid level height in the neutralization pool 2, the pH value in the neutralization pool 2, the pH value in the waste liquid inlet pipe 1 and the pH value in the waste liquid outlet pipe 3, the acid pump 62, the alkali pump 72, the drainage pump 1 51 and the drainage pump 2 52 are automatically started and stopped dynamically, reducing the need for staff to always pay attention to the pH value of the waste liquid, while achieving the effect of timely adding acid or alkali solution, reducing the labor intensity of the waste liquid acid-base neutralization process.

[0033] The present application embodiment discloses a control method for a resin regeneration waste liquid treatment and recovery system. Figures 1 to 3 , including the following steps.

[0034] S1. Set parameters. Set the first acidity threshold to 6; set the first alkalinity threshold to 9; set the second acidity threshold to 6; set the second alkalinity threshold to 9; set the third acidity threshold to 6; set the third alkalinity threshold to 9; set the highest liquid level threshold to 3 meters; set the lowest liquid level threshold to 1 meter; set the drainage delay time T1 to 1 minute; set the stirring delay time T2 to 5 minutes.

[0035] S2. Adjust the drainage pump 1 51 and the drainage pump 2 52 in the drainage assembly 5 to a stopped state.

[0036] S3. The second acid-base measuring instrument 21 detects the pH value in the neutralization water pool 2.

[0037] S4. If the value of the second acid-base measuring instrument 21 is between the second acidity threshold 6 and the second alkalinity threshold 9, proceed to step S5; if the value of the second acid-base measuring instrument 21 is greater than the second alkalinity threshold 9, proceed to step S81; if the value of the second acid-base measuring instrument 21 is less than the second acidity threshold 6, proceed to step S83.

[0038] S5, neutralizing the pool 2 to drain water, step S5 comprises the following steps: S51, adjusting the acid adding pump 62 in the acid solution assembly 6 and the alkali adding pump 72 in the alkali solution assembly 7 to a stopped state, waiting for the stirring delay time T2 and then stopping the Roots blower 81 in the stirring assembly 8, the stirring delay time T2 being 5 minutes; S52, the liquid level meter 4 detects the liquid level height value of the neutralization pool 2; S53. If the value of the liquid level gauge 4 is less than the minimum liquid level threshold of 1 meter, proceed to step S2; if the value of the liquid level gauge 4 is greater than the maximum liquid level threshold of 3 meters, turn on the drainage pump 1 51 in the drainage component 5 or turn on the drainage pump 2 52 in the drainage component 5, wait for the drainage delay time T1 and then proceed to step S6, the drainage delay time T1 is 1 minute.

[0039] S6. The third acid-base measuring instrument 31 detects the pH value in the waste liquid outlet pipe 3.

[0040] S7. If the value of the third acid-base measuring instrument 31 is between the third acidity threshold and the third alkalinity threshold, proceed to step S85; if the value of the third acid-base measuring instrument 31 is greater than the third alkalinity threshold, an error is reported and step S2 is performed; if the value of the third acid-base measuring instrument 31 is less than the third acidity threshold, an error is reported and step S2 is performed.

[0041] S8 includes the following steps: S81, a first acid-base measuring instrument 11 detects the pH value in the waste liquid inlet pipe 1; S82, if the value of the first acid-base measuring instrument 11 is greater than the first acidity threshold 6, proceed to step S91; if the value of the first acid-base measuring instrument 11 is less than the first acidity threshold 6, proceed to step S93; S83, the first acid-base measuring instrument 11 detects the pH value in the waste liquid inlet pipe 1; S84, if the value of the first acid-base measuring instrument 11 is less than the first alkalinity threshold 9, proceed to step S92; if the value of the first acid-base measuring instrument 11 is greater than the first alkalinity threshold 9, proceed to step S93; S85, the first acid-base measuring instrument 11 detects the pH value in the waste liquid inlet pipe 1; S86. If the value of the first acid-base measuring instrument 11 is greater than the first alkalinity threshold 9, proceed to step S91; if the value of the first acid-base measuring instrument 11 is less than the first acidity threshold 6, proceed to step S92; if the value of the first acid-base measuring instrument 11 is between the first acidity threshold 6 and the first alkalinity threshold 9, proceed to step S3.

[0042] S9, neutralization pool 2 performs acid-base neutralization, step S9 includes the following steps.

[0043] S91, the acid adding pump 62 in the acid solution assembly 6 is started, and step S93 is performed; S92, the alkali pump 72 in the alkali solution assembly 7 is started, and step S93 is performed; S93, the Roots blower 81 in the stirring assembly 8 is started, and step S2 is performed.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A control method for a resin regeneration waste liquid treatment and recovery system, characterized in that: The following steps are involved: S1, set the first acidity threshold; set the first alkalinity threshold; set the second acidity threshold; set the second alkalinity threshold; set the third acidity threshold; set the third alkalinity threshold; set the highest liquid level threshold; set the lowest liquid level threshold; set the drainage delay time T1; set the stirring delay time T2; S2, adjusting the discharge assembly to a stopped state; S3, a second acid-base measuring instrument detects the pH value in the neutralization pool; S4, if the pH value in the neutralization pool is qualified, proceed to step S5; if the pH value in the neutralization pool is unqualified, proceed to step S8; S5, neutralize the water tank for drainage; S6, the third acid-base measuring instrument detects the pH value in the waste liquid outlet pipe; S7, if the pH value of the wastewater outlet pipe is qualified, proceed to step S8; if the pH value of the wastewater outlet pipe is unqualified, an error is reported and step S2 is performed; S8, a first acid-base measuring instrument detects the pH value of the waste liquid inlet pipe; S9, neutralize the acid and alkali in the neutralization tank and proceed to step S2.

2. A resin regeneration waste liquid treatment and recovery system control method according to claim 1, characterized in that: The step S5 comprises the following steps: S51, adjusting the acid solution component and the alkali solution component to a stopped state, and adjusting the stirring component to a stopped state after waiting for a stirring delay time T2; S52, the liquid level meter detects the height value of the neutralization pool liquid level; S53, if the liquid level count value is less than the minimum liquid level threshold, proceed to step S2; if the liquid level count value is greater than the maximum liquid level threshold, the drain component is opened, and after waiting for the drainage delay time T1, proceed to step S6.

3. The control method for a resin regeneration waste liquid treatment and recovery system according to claim 1, characterized in that: The step S9 comprises the following steps: S91, the acid liquid component is started, and step S93 is performed; S92, the alkali solution component is started, and step S93 is performed; S93, the stirring component is started and step S2 is performed.

4. A resin regeneration waste liquid treatment and recovery system control method according to claim 3, characterized in that: The step S8 comprises the following steps: S81, a first acid-base measuring instrument detects the pH value of the waste liquid inlet pipe; S82, if the value of the first acid-base measuring instrument is greater than the first acidity threshold, proceed to step S91; if the value of the first acid-base measuring instrument is less than the first acidity threshold, proceed to step S93; S83, a first acid-base measuring instrument detects the pH value in the waste liquid inlet pipe; S84, if the value of the first acid-base measuring instrument is less than the first alkalinity threshold, proceed to step S92; if the value of the first acid-base measuring instrument is greater than the first alkalinity threshold, proceed to step S93; S85, a first acid-base measuring instrument detects the pH value in the waste liquid inlet pipe; S86. If the value of the first acid-base measuring instrument is greater than the first alkalinity threshold, proceed to step S91; if the value of the first acid-base measuring instrument is less than the first acidity threshold, proceed to step S92; if the value of the first acid-base measuring instrument is between the first acidity threshold and the first alkalinity threshold, proceed to step S3.

5. A resin regeneration waste liquid treatment and recovery system control method according to claim 4, characterized in that: The step S4 includes the following steps: if the value of the second acid-base measuring instrument is between the second acidity threshold and the second alkalinity threshold, proceed to step S5; if the value of the second acid-base measuring instrument is greater than the second alkalinity threshold, proceed to step S81; if the value of the second acid-base measuring instrument is less than the second acidity threshold, proceed to step S83.

6. A resin regeneration waste liquid treatment and recovery system control method according to claim 4, characterized in that: The step S7 includes the following steps: if the value of the third acid-base measuring instrument is between the third acidity threshold and the third alkalinity threshold, proceed to step S85; if the value of the third acid-base measuring instrument is greater than the third alkalinity threshold, an error is reported and step S2 is performed; if the value of the third acid-base measuring instrument is less than the third acidity threshold, an error is reported and step S2 is performed.

7. A resin regeneration waste liquid treatment and recovery system, applicable to the control method according to any one of claims 1 to 6, comprising a neutralization water tank, wherein a waste liquid inlet pipe and a waste liquid outlet pipe are connected to the neutralization water tank, and characterized in that: A liquid level meter is arranged on the neutralization water pool, a drainage assembly is arranged between the waste liquid outlet pipe and the neutralization water pool, the drainage assembly is used to guide the liquid in the neutralization water pool into the waste liquid outlet pipe, a first acid-base measuring instrument is arranged on the waste liquid inlet pipe, a second acid-base measuring instrument is arranged on the neutralization water pool, a third acid-base measuring instrument is arranged on the waste liquid outlet pipe, an acid assembly and an alkali assembly are connectedly arranged on the neutralization water pool, the acid assembly is used to inject acid into the neutralization water pool, the alkali assembly is used to inject alkali into the neutralization water pool, a stirring assembly is arranged on the neutralization water pool, and the stirring assembly is used to stir the liquid in the neutralization water pool.

8. A resin regeneration waste liquid treatment and recovery system according to claim 7, characterized in that: The stirring assembly includes a Roots blower and an air outlet pipe, one end of the air outlet pipe is located in the neutralization water tank, the other end of the air outlet pipe is located outside the neutralization water tank, and the outlet branch pipe is located outside the neutralization water tank and is connected to the air outlet end of the Roots blower.

9. A resin regeneration waste liquid treatment and recovery system according to claim 7, characterized in that: The drainage component includes a drainage pump 1, a drainage pump 2, a waste liquid branch pipe 1 and a waste liquid branch pipe 2. The input end of the drainage pump 1 and the input end of the drainage pump 2 are both connected to the neutralization tank. The waste liquid branch pipe 1 is connected and arranged between the output end of the drainage pump 1 and the waste liquid outlet pipe, and the waste liquid branch pipe 2 is connected and arranged between the output end of the drainage pump 2 and the waste liquid outlet pipe.

10. A resin regeneration waste liquid treatment and recovery system according to claim 7, characterized in that: The acid liquid component includes an acid liquid inlet pipe, an acid adding pump and an acid liquid tank, one end of the acid liquid inlet pipe is interconnected with the neutralization water tank, the other end of the acid liquid inlet pipe is interconnected with the output end of the acid adding pump, and the input end of the acid adding pump is interconnected with the acid liquid tank. The alkali liquid component includes an alkali liquid inlet pipe, an alkali adding pump and an alkali liquid tank, one end of the alkali liquid inlet pipe is interconnected with the neutralization water tank, the other end of the alkali liquid inlet pipe is interconnected with the output end of the alkali adding pump, and the input end of the alkali adding pump is interconnected with the alkali liquid tank.

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