CN220364447U - Device for recycling regenerated wastewater of primary desalting system in segmented mode - Google Patents

Abstract

The utility model relates to a device for segmented recovery of regeneration wastewater from a primary desalination system, which includes an activated carbon filter, an anode bed, a vacuum degassing tower, and an anode bed that are connected in series through pipelines; the activated carbon filter, anode bed, The negative bed is respectively provided with a forward washing pipeline system for forward washing; the activated carbon filter, the positive bed, and the negative bed are respectively provided with a backwash pipeline system for backwashing; the positive bed and negative bed are respectively provided with a backwash pipeline system for backwashing; the positive bed and negative bed A resin regeneration pipeline system is also provided respectively; the discharge end of the backwash pipeline system of the activated carbon filter is connected to the clarification tank; the discharge ends of the backwash pipeline system of the positive bed and negative bed are connected to the clean water tank ; The backwash pipeline system of the activated carbon filter, anode bed, and negative bed is equipped with a turbidity meter for detecting the turbidity of the backwash water discharged from the activated carbon filter; the forward wash pipeline system of the anode bed and negative bed Both are equipped with a pH meter for detecting the pH of the discharged positive wash water.

Description

A device for segmented recovery of regeneration wastewater from a primary desalination system

Technical field

The utility model relates to a device for segmentally recovering regeneration wastewater from a primary desalination system, and belongs to the technical field of boiler feed water preparation.

Background technique

The water source of a power plant is river water, and the process flow of its boiler feed water treatment system is: the river water passes through a mechanical accelerated clarifier, a sand filter, a first-level reverse osmosis, an activated carbon filter, an anode bed, a vacuum degassing tower, a cathode bed, and a mixed bed. , desalted water tanks and other equipment are used to produce water. Usually activated carbon filters, anode beds, vacuum degassing towers, anode beds and other equipment are combined into a first-level desalination system to desalinize water, and use acid and alkali to neutralize the anode in the anode bed. The resin and anion resin in the anion bed are regenerated to meet the needs of desalination and water production. Acid-base regeneration requires steps such as small backwashing, regeneration liquid introduction, forward washing, and circulating forward washing, which often generates a large amount of wastewater. At the same time, before the first-level desalination system is put into operation, the activated carbon filter needs to be backwashed. Consumes a lot of water.

The Chinese patent with announcement number CN206108984U discloses a boiler feed water desalination treatment wastewater classification collection and reuse system including a positive bed, a negative bed and a mixed bed. The positive bed, negative bed and mixed bed are respectively equipped with water inlets and outlets. , the water outlet of the positive bed is connected to the water inlet of the negative bed, and the water outlet of the negative bed is connected to the water inlet of the mixed bed; there is a return water pipe from the negative bed to the positive bed connected between the water outlet of the negative bed and the water inlet of the positive bed. A first control valve is provided in the return water pipeline from the negative bed to the positive bed; a return water pipeline from the mixed bed to the positive bed is connected between the water outlet of the mixed bed and the water inlet of the positive bed, and there is a return water pipeline from the mixed bed to the positive bed. A second control valve is installed in the middle, so that the equipment flushing water can be directly reused, reducing the discharge of waste water and improving the reuse rate.

When the equipment is backwashed, activated carbon filters, anode beds, anode beds and other equipment are often preset and controlled through the PLC control system. When the degree of activated carbon or resin contamination is low, the backwash time is less than the set value. It can backwash clean, but executing according to the set value will cause an increase in water consumption; when the degree of resin contamination is high, executing according to the set value still cannot backwash the resin clean, which will affect the regeneration effect of the resin. The above-mentioned patent The solution cannot adjust the backwash time according to the degree of contamination of activated carbon or resin, so as to save water and reduce damage to the resin regeneration effect.

Utility model content

In order to overcome the above problems, the present invention provides a device for segmented recycling of regeneration wastewater from a primary desalination system, which can classify and recycle wastewater with different degrees of pollution produced during the regeneration stage for reuse, and adjust the cationic content according to the degree of pollution of the resin. Backwashing time for beds, shade beds and other equipment to reduce water consumption.

The technical solution of the present utility model is as follows:

A device for segmented recovery of regeneration wastewater from a primary desalination system, including an activated carbon filter, a positive bed, a vacuum degassing tower, and a negative bed connected in series through pipelines; the activated carbon filter, positive bed, and negative bed are respectively provided with There is a forward washing pipeline system for forward washing; the activated carbon filter, the positive bed, and the negative bed are respectively equipped with a backwash pipeline system for backwashing; the positive bed and the negative bed are also respectively equipped with Resin regeneration pipeline system; the discharge end of the backwash pipeline system of the activated carbon filter is connected to the clarification tank; the discharge ends of the backwash pipeline system of the positive bed and negative bed are connected to the clean water tank; the activated carbon The backwash piping systems of the filter, anode bed, and negative bed are all equipped with turbidity meters for detecting the turbidity of the backwash water discharged from them; the forward wash piping systems of the anode bed and negative bed are all equipped with A pH meter for detecting the pH of the discharged positive wash water; each pH meter is connected to the clean water tank through a clean water pipe and connected to the waste water tank through a waste water pipe.

Further, the forward washing piping system of the activated carbon filter includes a carbon filter water inlet pipe placed on the upper part of the activated carbon filter, and a carbon filter water outlet pipe placed on the lower part of the activated carbon filter; the backwashing piping system of the activated carbon filter It includes a carbon filter backwash water inlet branch pipe and a carbon filter backwash pipe; both ends of the carbon filter backwash water inlet pipe are connected to the carbon filter water inlet pipe and the carbon filter water outlet pipe respectively; the carbon filter backwash pipe Both ends are connected to the carbon filter water inlet pipe and the clarification tank respectively; the carbon filter backflow pipe is placed between the carbon filter backwash water inlet branch pipe and the activated carbon filter.

Further, the positive washing pipeline system of the sun bed includes a sun bed water inlet pipe placed on the upper part of the sun bed, and a sun bed water outlet pipe placed on the lower part of the sun bed, and the sun bed water inlet pipe is connected to the carbon filter outlet pipe; The backwash pipeline system of the anode bed includes an anode bed backwash water inlet pipe and an anode bed backwash pipe; both ends of the anode bed backwash water inlet pipe are respectively connected to the carbon filter outlet pipe and anode bed water outlet pipe; The two ends of the positive bed backflow pipe are connected to the positive bed water inlet pipe and the clean water pool respectively.

Further, the upper part of the vacuum degassing tower is provided with a degassing tower water inlet pipe, and the lower part is provided with a degassing tower water outlet pipe; the degassing tower water inlet pipe is connected to the sun bed water outlet pipe.

Further, the upper part of the shade bed is provided with a shade bed water inlet pipe, and the lower part is provided with a shade bed water outlet pipe; the shade bed water inlet pipe is connected to the degassing tower outlet pipe; the shade bed water outlet pipe is provided with The lower water inlet branch pipe is provided with a positive washing water inlet pipe of the negative bed, and the discharge end of the positive washing water inlet pipe of the negative bed is connected with the negative water inlet pipe of the negative bed; the positive washing pipeline system of the negative bed includes a positive washing pipe of the negative bed. The positive washing water inlet pipe and the cathode bed outlet pipe; the backwash pipeline system of the cathode bed includes a lower water inlet branch pipe and a cathode bed backwash pipe. The two ends of the cathode bed backwash pipe are respectively connected to the cathode bed water inlet pipe and the cathode bed water outlet pipe. It is said that the clear water pool is connected.

Further, the clean water pipe connected to each of the pH meters is connected to the clean water inlet pipe of the clean water pool, and the clean water outlet pipe of the clean water pool is connected to the carbon filter inlet pipe; the discharge end of the clean water outlet pipe is located On the side of the carbon filter backflow pipe away from the activated carbon filter; the waste water pipes connected to each of the pH meters are connected to the waste water inlet pipe of the waste pool; all the waste water pipes connected to the same pH meter are connected to the waste water inlet pipe of the waste pool. The clean water pipe and the waste water pipe are arranged in parallel.

Further, the lower part of the anode bed is also provided with an acid inlet pipe for the acid liquid to enter, and the middle part of the anode bed is provided with an acid discharge pipe; the lower part of the anode bed is also provided with an alkali inlet pipe for the alkali liquid to enter, and the middle part of the anode bed is provided with an alkali inlet pipe. There is an alkali discharge pipe; the other ends of the acid discharge pipe and the alkali discharge pipe are connected to the wastewater inlet pipe; the acid inlet pipe and the alkali inlet pipe are provided with a metering pump for extracting the solution.

Further, the two ends of the carbon filter backwash water inlet branch pipe, the two ends of the positive bed backwash water inlet pipe, the two ends of the negative bed forward wash water inlet pipe, the two ends of the positive bed reverse discharge pipe, and the negative bed reverse discharge pipe. Both ends of the carbon filter water inlet pipe, carbon filter water outlet pipe, sun bed water inlet pipe, sun bed water outlet pipe, shade bed water inlet pipe, shade bed water outlet pipe, and lower water inlet branch pipe are all equipped with No. 1 for guiding the flow of liquid. Valve, No. 1 valve is controlled by PLC controller to open or close to guide the flow of liquid flowing through it.

Further, the acid inlet pipe, the alkali inlet pipe, the acid discharge pipe, the alkali discharge pipe, each of the clean water pipes, and each of the waste water pipes are provided with a No. 2 valve for guiding the flow of liquid. The No. 2 valve They are all controlled by a PLC controller to open or close to guide the flow of liquid flowing through them.

The utility model has the following beneficial effects:

1. This utility model sets turbidity meters on the carbon filter backwash pipe, anode bed backwash pipe, and cathode bed backwash pipe respectively, and detects the turbidity of the activated carbon filter, anode bed, and cathode bed backwash water, and utilizes The PLC controller controls the backwashing time of each equipment when the turbidity is different. When the turbidity of the backwash water flowing through it is detected to be low, the backwashing of the equipment can be ended in advance even if the backwashing time is less than the set value. When the turbidity is high, by extending the backwashing time of the equipment until the turbidity reaches the required level, the backwashing is completed, thereby adjusting the water use in small backwashing steps, improving the backwashing effect while preventing the waste of water resources. .

2. This utility model discharges the carbon filter backwash water with good backwash water quality into the clarification tank through the carbon filter back-discharge pipe for water reuse, so that it can be put back into the water treatment system through the clarification tank, saving raw water as raw water. The amount of river water used; the pH meter of the positive washing water of the positive bed and negative bed can be monitored through the pH meter installed on the positive and negative bed outlet pipes. When the pH is high, the normal washing water of each equipment will be discharged into In the wastewater pool, when the pH decreases, the PLC controller switches the valve to discharge the positive wash water into the clean water tank, and at the same time, all the backwash water from the anode bed and the negative bed is discharged into the clean water tank to avoid damaging the normal operation of the equipment during the regeneration process. All washing water and backwash water are discharged into the wastewater pool, which reduces the amount of water that needs to be neutralized in the wastewater pool and greatly saves treatment costs.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

The reference marks in the figure are:

1. Activated carbon filter; 11. Carbon filter water inlet pipe; 12. Carbon filter reverse discharge pipe; 13. Carbon filter outlet pipe; 14. Yang bed backwash water inlet pipe; 15. Carbon filter backwash water inlet branch pipe; 2. Yang bed backwash water inlet pipe; bed; 21. Yang bed water inlet pipe; 22. Yang bed reverse discharge pipe; 23. Yang bed water outlet pipe; 24. Acid inlet pipe; 25. Acid discharge pipe; 3. Vacuum degassing tower; 31. Degassing tower water inlet pipe ; 32. Degassing tower outlet pipe; 4. Yin bed; 41. Yin bed water inlet pipe; 42. Yin bed reverse discharge pipe; 43. Yin bed outlet pipe; 44. Alkali inlet pipe; 45. Alkali discharge pipe; 46. Lower water inlet branch pipe; 47. Yin bed positive washing water inlet pipe; 5. Clarification tank; 6. Clean water tank; 61. Clean water inlet pipe; 611. Clean water pipe; 62. Clean water outlet pipe; 7. Wastewater pool; 71. Wastewater inlet Water pipe; 711, waste water pipe; 8, turbidity meter; 9, PH meter; 10, metering pump; 101, valve No. 1; 101', valve No. 2.

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to Figure 1, a device for segmented recovery of regeneration wastewater from a primary desalination system includes an activated carbon filter 1, an anode bed 2, a vacuum degassing tower 3, and an anode bed 4 connected in series through pipelines; the activated carbon filter 1. The positive bed 2 and the negative bed 4 are respectively provided with a forward washing pipeline system for forward washing; the activated carbon filter 1, the positive bed 2 and the negative bed 4 are respectively provided with a backwash system for backwashing them. Wash pipeline system; the anode bed 2 and the anode bed 4 are also respectively provided with a resin regeneration pipeline system; the discharge end of the backwash pipeline system of the activated carbon filter 1 is connected to the clarifier 5; the anode bed 2. The discharge ends of the backwash piping system of the cathode bed 4 are connected to the clean water tank 6; the backwash piping systems of the activated carbon filter 1, the cathode bed 2, and the cathode bed 4 are all equipped with sensors for detecting their discharge. A turbidity meter 8 for the turbidity of the backwash water; a PH meter 9 for detecting the pH of the discharged positive wash water is provided on the forward wash pipeline systems of the anode bed 2 and the anode bed 4; each of the PH meters 9 are respectively connected to the clean water pool 6 through a clean water pipe 611 and the waste water pool 7 through a waste water pipe 711.

Further, the positive cleaning pipeline system of the activated carbon filter 1 includes a carbon filter water inlet pipe 11 placed on the upper part of the activated carbon filter 1, and a carbon filter water outlet pipe 13 placed on the lower part of the activated carbon filter 1; the activated carbon filter 1 The backwash pipeline system includes a carbon filter backwash water inlet branch pipe 15 and a carbon filter backwash pipe 12; the two ends of the carbon filter backwash water inlet branch pipe 15 are respectively connected with the carbon filter water inlet pipe 11 and the carbon filter water outlet pipe. 13 is connected; both ends of the carbon filter backwash pipe 12 are connected to the carbon filter water inlet pipe 11 and the clarification tank 5 respectively; the carbon filter backwash pipe 12 is placed in the carbon filter backwash water inlet branch pipe 15 and the activated carbon filter 1.

Further, the positive washing pipeline system of the sun bed 2 includes a sun bed water inlet pipe 21 placed on the upper part of the sun bed 2, and a sun bed water outlet pipe 23 placed on the lower part of the sun bed 2. The sun bed water inlet pipe 21 is connected with the carbon bed. The filter outlet pipe 13 is connected; the backwash pipeline system of the anode bed 2 includes an anode backwash water inlet pipe 14 and an anode bed backwash pipe 22; both ends of the anode backwash water inlet pipe 14 are connected to the carbon bed respectively. The filter outlet pipe 13 and the anode bed water outlet pipe 23 are connected; the two ends of the anode bed backflow pipe 22 are connected to the anode bed water inlet pipe 21 and the clean water pool 6 respectively.

Furthermore, a degassing tower water inlet pipe 31 is provided at the upper part of the vacuum degassing tower 3, and a degassing tower water outlet pipe 32 is provided at the lower part thereof; the degassing tower water inlet pipe 31 is connected to the sun bed water outlet pipe 23.

Further, the upper part of the negative bed 4 is provided with a negative bed water inlet pipe 41, and the lower part is provided with a negative bed water outlet pipe 43; the negative bed water inlet pipe 41 is connected to the degassing tower outlet pipe 32; the negative bed The water outlet pipe 43 is provided with a lower water inlet branch pipe 46, and the lower water inlet branch pipe 46 is provided with a cathode bed positive washing water inlet pipe 47. The discharge end of the cathode bed positive washing water inlet pipe 47 is connected to the cathode bed water inlet pipe 41; The positive washing pipeline system of the negative bed 4 includes the positive washing water inlet pipe 47 of the negative bed and the negative water outlet pipe 43; the backwashing pipeline system of the negative bed 4 includes a lower water inlet branch pipe 46 and a negative discharge pipe 42. Both ends of the bed backflow pipe 42 are connected to the negative bed water inlet pipe 41 and the clean water pool 6 respectively.

Further, the clean water pipe 611 connected to each of the pH meters 9 is connected to the clean water inlet pipe 61 of the clean water tank 6, and the clean water outlet pipe 62 of the clean water tank 6 is connected to the carbon filter inlet pipe 11; The discharge end of the clean water outlet pipe 62 is placed on the side of the carbon filter backflow pipe 12 away from the activated carbon filter 1; the waste water pipe 711 connected to each of the pH meters 9 is connected to the waste water in the waste pool 7 The water inlet pipe 71 is connected; the clean water pipe 611 and the waste water pipe 711 connected to the same pH meter 9 are arranged in parallel.

Further, the lower part of the anode bed 2 is also provided with an acid inlet pipe 24 for the acid liquid to enter, and the middle part of the anode bed 2 is provided with an acid discharge pipe 25; the lower part of the anode bed 4 is also provided with an alkali inlet pipe for the alkali liquid to enter. 44. There is an alkali discharge pipe 45 in the middle of the cathode bed 4; the other ends of the acid discharge pipe 25 and the alkali discharge pipe 45 are connected to the wastewater inlet pipe 71; the acid inlet pipe 24 and the alkali inlet pipe 44 are provided with There is a metering pump 10 for pumping the solution.

Further, the two ends of the carbon filter backwash water inlet branch pipe 15, the two ends of the anode bed backwash water inlet pipe 14, the two ends of the cathode bed forward wash water inlet pipe 47, the two ends of the cathode bed backwash pipe 22, the cathode bed backwash inlet pipe 14, Both ends of the bed reverse discharge pipe 42, as well as the carbon filter water inlet pipe 11, the carbon filter water outlet pipe 13, the anode bed water inlet pipe 21, the anode bed water outlet pipe 23, the anode bed water inlet pipe 41, the anode bed water outlet pipe 43, and the lower water inlet branch pipe 46 are equipped with a No. 1 valve 101 for guiding the flow of liquid. The No. 1 valve 101 is controlled by a PLC controller to open or close to guide the flow of liquid flowing through it.

Further, the acid inlet pipe 24, the alkali inlet pipe 44, the acid discharge pipe 25, the alkali discharge pipe 45, each of the clean water pipes 611, and each of the waste water pipes 711 are provided with two pipes for guiding the flow of liquid. The No. 1 valve 101' and the No. 2 valve 101' are controlled by the PLC controller to open or close to guide the flow direction of the liquid flowing through them.

The working principle of this utility model:

Referring to Figure 1, when clean water is undergoing primary desalination, the clean water flows in from the carbon filter inlet pipe 11, and sequentially flows through the carbon filter outlet pipe 13, anode bed inlet pipe 21, anode bed outlet pipe 23, degassing tower inlet pipe 31, The water outlet pipe 32 of the degassing tower and the water inlet pipe 41 of the cathode bed finally flow out from the water outlet pipe 43 of the cathode bed and enter the next water treatment process.

After the first-level desalination is carried out, it is necessary to perform a small backwash on the activated carbon filter 1, anode bed 2, and cathode bed 4 respectively to wash out the suspended matter and colloidal matter brought by the clean water deposited in each equipment. Prevent it from affecting the efficiency of subsequent acid-base regeneration in the anode bed 2 and the cathode bed 4.

The small backwash process of activated carbon filter 1: the backwash water is clean water. The clean water enters from the carbon filter backwash inlet branch pipe 15 and exits from the carbon filter backwash pipe 12. Since the quality of the backwash water of the activated carbon filter 1 is good, Discharge it into the clarifier 5 and let it enter the boiler feed water treatment system through the clarifier 5 to realize the recycling of the backwash water of the activated carbon filter 1.

The small backwash process of the anode bed 2: the backwash water is the discharge water from the carbon filter outlet pipe 13, which enters from the anode bed backwash inlet pipe 14 and exits from the anode bed backwash pipe 22.

The small backwash process of the cathode bed 4: the backwash water needs to use another water source, which enters from the lower water inlet branch pipe 46 and exits from the cathode bed backwash pipe 42.

In order to control the backwash time of each equipment according to the different turbidity of the backwash water of activated carbon filter 1, anode bed 2 and anode bed 4, so as to achieve the purpose of saving water, the carbon filter backwash pipe 12 and anode bed backwash pipe 22. Turbidity meters 8 for detecting the turbidity of the backwash water are respectively installed on the negative bed backwash pipe 42. When the turbidity meter 8 detects that the turbidity of the backwash water flowing through it is less than 1 FTU (turbidity unit) , the PLC controller ends the backwashing of the equipment in advance, and when the backwash water turbidity is greater than 1FTU, the PLC controller extends the backwashing of the equipment.

After the anode bed 2 and the anode bed 4 desalinize the clean water in sequence, the cation resin in the anode bed 2 and the anion resin in the anode bed 4 need to be regenerated so that they can continue to be put into use. Therefore, acid solution needs to be fed to the anode bed. In the bed 2, the alkali liquid is introduced into the anode bed 4, and then the acid-base regeneration waste liquid after the reaction is discharged, and the anode bed 2 and the anode bed 4 are respectively forward washed to prevent the regeneration waste liquid from remaining.

The regeneration and positive washing process of the anode bed 2 and anode bed 4 is as follows: the acid liquid is introduced from the acid inlet pipe 24, the acid liquid reacts with the cation resin in the anode bed 2 for regeneration, and the waste liquid generated by the reaction is discharged from the acid discharge pipe 25. After the anode bed 2 is discharged, the positive wash water of the anode bed 2 is the water discharged from the carbon filter outlet pipe 13, which enters from the anode bed water inlet pipe 21 and goes out from the anode bed water outlet pipe 23; The alkali pipe 44 enters, and the alkali liquid reacts with the anion resin in the cathode bed 4 for regeneration. After the waste liquid produced by the reaction comes out of the alkali discharge pipe 45, the cathode bed 4 is washed. The water for the cathode bed 4 is washed from the bottom. The water flowing out from the water inlet branch pipe 46 enters from the cathode bed positive washing water inlet pipe 47, flows through the cathode bed water inlet pipe 41 and then flows out from the cathode bed outlet pipe 43; among them, the acid inlet pipe 24 and the alkali inlet pipe 44 are provided The metering pump 10 is used to extract the solution, and the acid-base regeneration waste liquid is discharged into the waste pool 7 through the acid discharge pipe 25 and the alkali discharge pipe 45 respectively.

The pH value of the positive washing water of the positive bed 2 and the negative bed 4 is detected by the pH meter 9 respectively installed on the positive bed outlet pipe 23 and the negative bed water outlet pipe 43. According to the difference in pH value, the positive wash water flows to the clear pool 6 or Wastewater pool 7: When the pH value of the positive washing water is less than 6 or greater than 8, the positive washing water discharged from the positive bed outlet pipe 23 and the negative bed outlet pipe 43 is discharged into the wastewater inlet pipe 71 through the wastewater pipe 711 connected thereto, respectively. It can be discharged into the wastewater pool 7 for neutralization treatment of the wastewater; when the pH value of the positive washing water is between 6 and 8, the positive washing water discharged from the positive bed outlet pipe 23 and the negative bed outlet pipe 43 are connected to them respectively. The clean water pipe 611 flows into the clean water inlet pipe 61 to enter the clean water pool 6 for recycling. For example, the clean water outlet pipe 62 is connected to the carbon filter inlet pipe 11, and the water in the clean water pool 6 is used as the inlet water of the activated carbon filter 1. , so that it can be put back into use in the boiler feed water treatment system.

Among them, the two ends of the carbon filter backwash water inlet branch pipe 15, the two ends of the anode backwash water inlet pipe 14, the two ends of the negative bed forward wash water inlet pipe 47, the two ends of the anode bed reverse discharge pipe 22, the negative bed reverse discharge pipe Both ends of the pipe 42, as well as the carbon filter inlet pipe 11, carbon filter outlet pipe 13, anode bed inlet pipe 21, anode bed outlet pipe 23, anode bed water inlet pipe 41, anode bed outlet pipe 43, and lower water inlet branch pipe 46 are all connected There is a No. 1 valve 101; an acid inlet pipe 24, an alkali inlet pipe 44, an acid discharge pipe 25, an alkali discharge pipe 45, each clean water pipe 611, and each waste water pipe 711 are provided with a No. 2 valve 101', and a No. 1 valve Both valve 101 and valve 2 101' are controlled by a PLC controller to open or close to guide the flow of liquid flowing through them.

The above descriptions are only examples of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly used in other applications Relevant technical fields are similarly included in the scope of patent protection of the present utility model.

Claims (9)

1. A device for segmented recovery of regeneration wastewater from a primary desalination system, including an activated carbon filter (1), a positive bed (2), a vacuum degassing tower (3), and a negative bed (4) connected in series through pipelines ; The activated carbon filter (1), the anode bed (2), and the anode bed (4) are respectively provided with a forward washing pipeline system for forward washing; the activated carbon filter (1), anode bed (2) ) and the negative bed (4) are respectively provided with backwash pipeline systems for backwashing them; the positive bed (2) and the negative bed (4) are also respectively provided with a resin regeneration pipeline system; it is characterized by: : The discharge end of the backwash piping system of the activated carbon filter (1) is connected to the clarifier (5); the discharge ends of the backwash piping system of the positive bed (2) and negative bed (4) are both connected to The clean water pool (6) is connected; the backwash pipeline system of the activated carbon filter (1), anode bed (2), and cathode bed (4) is equipped with a turbidity tester for detecting the turbidity of the backwash water discharged therefrom. Instrument (8); the positive washing pipeline system of the positive bed (2) and negative bed (4) is equipped with a pH meter (9) for detecting the pH of the positive washing water discharged therefrom; each of the pH meters (9) Connect the clean water pool (6) through the clean water pipe (611) and connect the waste water pool (7) through the waste water pipe (711). 2. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 1, characterized in that: the positive washing pipeline system of the activated carbon filter (1) includes a device placed on the activated carbon filter (1). ), the carbon filter water inlet pipe (11) on the upper part, and the carbon filter water outlet pipe (13) placed on the lower part of the activated carbon filter (1); the backwash pipeline system of the activated carbon filter (1) includes the carbon filter backwash water inlet Branch pipe (15), carbon filter backwash pipe (12); the two ends of the carbon filter backwash water inlet branch pipe (15) are connected to the carbon filter water inlet pipe (11) and the carbon filter water outlet pipe (13) respectively; Both ends of the carbon filter backflow pipe (12) are connected to the carbon filter water inlet pipe (11) and the clarification tank (5) respectively; the carbon filter backflow pipe (12) is placed on the carbon filter Backwash between the water inlet branch pipe (15) and the activated carbon filter (1). 3. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 2, characterized in that: the positive washing pipeline system of the anode bed (2) includes a device placed on the upper part of the anode bed (2). The sun bed water inlet pipe (21), the sun bed water outlet pipe (23) placed at the lower part of the sun bed (2), the sun bed water inlet pipe (21) is connected with the carbon filter water outlet pipe (13); the sun bed (2) The backwash pipeline system of 2) includes an anode backwash inlet pipe (14) and an anode backwash pipe (22); both ends of the anode backwash inlet pipe (14) are connected to the carbon filter outlet pipe respectively. (13) and the sun bed water outlet pipe (23) are connected; the two ends of the sun bed backflow pipe (22) are connected to the sun bed water inlet pipe (21) and the clean water pool (6) respectively. 4. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 3, characterized in that: the upper part of the vacuum degassing tower (3) is provided with a degassing tower water inlet pipe (31), A degassing tower water outlet pipe (32) is provided at its lower part; the degassing tower water inlet pipe (31) is connected to the sun bed water outlet pipe (23). 5. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 4, characterized in that: the upper part of the cathode bed (4) is provided with a cathode bed water inlet pipe (41), and the lower part is provided with a cathode bed water inlet pipe (41). There is a water outlet pipe (43) of the negative bed; the water inlet pipe (41) of the negative bed is connected with the water outlet pipe (32) of the degassing tower; the water outlet pipe (43) of the negative bed is provided with a lower water inlet branch pipe (46) , the lower water inlet branch pipe (46) is provided with a negative bed positive washing water inlet pipe (47), and the discharge end of the negative bed positive washing water inlet pipe (47) is connected to the negative bed water inlet pipe (41); the negative bed (47) The forward washing pipeline system of 4) includes the positive washing water inlet pipe (47) of the negative bed and the negative water outlet pipe (43); the backwash pipeline system of the negative bed (4) includes the lower water inlet The branch pipe (46) and the negative bed reverse discharge pipe (42) are connected to the negative bed water inlet pipe (41) and the clear water pool (6) at both ends. 6. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 2, characterized in that: the clean water pipes (611) connected to each of the pH meters (9) are all connected to the clean water pipes (611). The clean water inlet pipe (61) of the pool (6) is connected, and the clean water outlet pipe (62) of the clean water pool (6) is connected with the carbon filter inlet pipe (11); the discharge end of the clean water outlet pipe (62) is placed on The carbon filter backflow pipe (12) is on the side away from the activated carbon filter (1); the wastewater pipe (711) connected to each of the pH meters (9) is connected to the wastewater pool (7). The waste water inlet pipe (71) is connected; the clean water pipe (611) and the waste water pipe (711) connected to the same pH meter (9) are arranged in parallel. 7. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 6, characterized in that: the lower part of the anode bed (2) is also provided with an acid inlet pipe (24) for acid liquid to enter. , the positive bed (2) is provided with an acid discharge pipe (25) in the middle; the lower part of the negative bed (4) is also provided with an alkali inlet pipe (44) for alkali liquid to enter, and the negative bed (4) is provided with an alkali discharge pipe in the middle (45); the other ends of the acid discharge pipe (25) and the alkali discharge pipe (45) are connected to the wastewater inlet pipe (71); the acid inlet pipe (24) and the alkali inlet pipe (44) are A metering pump (10) for extracting solution is provided. 8. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 5, characterized in that: both ends of the carbon filter backwash inlet branch pipe (15) and the positive bed backwash inlet pipe (14), both ends of the negative bed positive washing water inlet pipe (47), both ends of the positive bed reverse discharge pipe (22), both ends of the negative bed reverse discharge pipe (42), and the carbon filter water inlet pipe ( 11), Carbon filter outlet pipe (13), Yang bed water inlet pipe (21), Yang bed water outlet pipe (23), Yin bed water inlet pipe (41), Yin bed water outlet pipe (43), Lower water inlet branch pipe (46) The No. 1 valve (101) is equipped with a No. 1 valve (101) for guiding the flow of liquid. The No. 1 valve (101) is controlled by a PLC controller to open or close to guide the flow of liquid flowing through it. 9. A device for segmented recovery of regeneration wastewater from a primary desalination system according to claim 7, characterized in that: the acid inlet pipe (24), the alkali inlet pipe (44), and the acid discharge pipe (25) , the alkali discharge pipe (45), each of the clean water pipes (611), and each of the waste water pipes (711) are provided with a No. 2 valve (101') for guiding the flow of liquid. The No. 2 valve (101' ) are controlled by a PLC controller to open or close to guide the flow of liquid flowing through it.