Condensate polishing resin regeneration system

Abstract

The utility model relates to the technical field of condensate polishing, in particular to a condensate polishing resin regeneration system which comprises a separating tower, a negative tower, a positive tower and a first resin conveying pipe capable of conveying invalid mixed resin to the separating tower, and the separating tower is respectively connected with the bottom of the negative tower and the upper portion of the positive tower through a second resin conveying pipe. The second resin conveying pipe is connected with the first resin conveying pipe; the middle part of the separation tower is connected with the upper part of the negative tower through a negative resin conveying pipe; wherein the negative tower is connected with a chlorine meter, a phosphorus meter, a first pH meter and a first conductivity meter, and the positive tower is connected with a sodium meter, an ammonium meter, a second pH meter and a second conductivity meter. An on-line meter can be used for tracking and monitoring ion concentration indexes in eluent in the regeneration process of cation resin of a cation tower and anion resin of an anion tower, and a regeneration end point is judged from the tracking indexes.

Description

Technical Field

[0001] The utility model relates to the technical field of condensate polishing, in particular to a condensate polishing resin regeneration system. Background Art

[0002] At present, the acid and alkali dosage of resin regeneration in the high-speed mixed bed of the condensate polishing system of many thermal power plants is mostly calculated theoretically during the commissioning period, but when the water vapor quality, resin quantity and other conditions of the power plant change during operation, they are not adjusted to a reasonable amount accordingly. At the same time, due to the different water quality components and impurity ion contents in the condensate of each power plant, the complete regeneration of the resin cannot be guaranteed by referring to the data of other operating power plants.

[0003] The above-mentioned problem of acid and alkali dosage for regeneration of fine treatment resin will lead to two situations: one is insufficient acid and alkali dosage during regeneration, and the other is excessive acid and alkali dosage during regeneration. The former will cause incomplete resin regeneration, reduce water production during the fine treatment high-mix cycle, thus leading to the regeneration frequency of resin, and increase the amount of hydrochloric acid, sodium hydroxide and demineralized water used for regeneration; the latter will cause waste of regenerated acid and alkali, and increase the regeneration cost.

[0004] The Chinese patent with the announcement date of May 20, 2022 and the announcement number CN114515608A discloses the invention patent of "Condensate polishing high tower method resin in vitro separation and regeneration system and its control method". The patent discloses the condensate polishing high tower method resin in vitro separation and regeneration system and its control method, including a resin separation tower, anion resin tower, cation resin tower, resin feed pipe, main conveying pipe and fat mixing tank, separation discharge pipe, anion resin discharge pipe, cation resin conveying pipe, anion resin output pipe, fat mixing output pipe, and fat mixing discharge pipe. The condensate polishing high tower method resin in vitro separation and regeneration system of the invention does not need to install position detection equipment such as photoelectric detection, ultrasonic detection or image intelligent recognition to detect and identify the position of the resin, avoiding the deviation of the cation and anion resin ratio caused by failure and error of the detection and identification equipment, and improving the accuracy and reliability of the operation of the entire system. However, the patent does not involve the use of online meters to track and monitor the concentration indicators of various ions in the eluent during the regeneration process of the cation tower cation resin and the anion tower anion resin, and determine the regeneration end point from the tracking indicators. Utility Model Content

[0005] Therefore, the utility model aims to overcome the technical problems in the prior art, thereby providing a condensate polishing resin regeneration system.

[0006] The utility model provides a condensate polishing resin regeneration system, comprising: a separation tower, a negative tower and a positive tower, and a first resin delivery pipe capable of delivering failed mixed fat to the separation tower, wherein the separation tower is respectively connected to the bottom of the negative tower and the upper part of the positive tower through a second resin delivery pipe, the second resin delivery pipe is connected to the first resin delivery pipe, and the middle part of the separation tower is connected to the upper part of the negative tower through the negative resin delivery pipe;

[0007] The anion tower is connected to a chlorine meter, a phosphorus meter, a first pH meter and a first conductivity meter, and the cation tower is connected to a sodium meter, an ammonium meter, a second pH meter and a second conductivity meter.

[0008] Furthermore, a first electric valve is installed on the first resin delivery pipe, and the first electric valve is located between the second resin delivery pipe and the separation tower, a second electric valve is installed on the anion resin delivery pipe, and a third electric valve and a fourth electric valve are installed on the second resin delivery pipe, the third electric valve is located between the first resin delivery pipe and the separation tower, the fourth electric valve is located between the anion tower and the yang tower, the bottom of the separation tower is connected to the second resin delivery pipe through a third resin output pipe, and a fifth electric valve is installed on the third resin output pipe.

[0009] Furthermore, the spent mixed fat is hydraulically stratified in a separation tower to form an anion resin at the top and a cation resin at the bottom. The anion resin at the top of the separation tower is transferred to the anion tower via an anion resin transfer pipe, and the cation resin at the bottom of the separation tower is transferred to the cation tower via a second resin transfer pipe.

[0010] Furthermore, an alkali inlet pipe is connected to the upper part of the cathode tower, and a sixth electric valve is installed on the alkali inlet pipe; a fourth resin output pipe and a cathode water outlet pipe are arranged at the bottom of the cathode tower; one end of the fourth resin output pipe is connected to the bottom of the cathode tower, and the other end is connected to the second resin transmission pipe, and a seventh electric valve is installed on the fourth resin output pipe; one end of the cathode water outlet pipe is connected to the bottom of the cathode tower, and the other end is connected to the sewage pipe, and an eighth electric valve is installed on the cathode water outlet pipe; the end of the cathode water outlet pipe away from the cathode tower is connected to a first sampling tube, and a first manual valve is installed on the first sampling tube.

[0011] Furthermore, the chlorine meter, phosphorus meter, first pH meter and first conductivity meter are all connected to the end of the first sampling tube away from the anion tower.

[0012] Furthermore, an acid inlet pipe is connected to the upper part of the yang tower, and a ninth electric valve is installed on the acid inlet pipe; a fifth resin output pipe and a yang tower water outlet pipe are arranged at the bottom of the yang tower; one end of the fifth resin output pipe is connected to the bottom of the yang tower, and the other end is connected to the second resin transmission pipe, and a tenth electric valve is installed on the fifth resin output pipe; one end of the yang tower water outlet pipe is connected to the bottom of the yang tower, and the other end is connected to the sewage pipe, and an eleventh electric valve is installed on the yang tower water outlet pipe; a second sampling pipe is connected to the end of the yang tower water outlet pipe away from the yang tower, and a second manual valve is installed on the second sampling pipe.

[0013] Furthermore, the sodium meter, the ammonium meter, the second pH meter and the second conductivity meter are all connected to the end of the second sampling tube away from the cathode tower.

[0014] Furthermore, it also includes a PLC1 controller, and the chlorine meter, phosphorus meter, first pH meter, first conductivity meter and sixth electric valve are all connected to the PLC1 controller. The PLC1 controller receives signals from the chlorine meter, phosphorus meter, first pH meter, first conductivity meter and sixth electric valve, and controls the switch of the sixth electric valve according to the signals from the chlorine meter, phosphorus meter, first pH meter and first conductivity meter.

[0015] Furthermore, it also includes a PLC2 controller, and the sodium meter, ammonium meter, second pH meter, second conductivity meter and ninth electric valve are all connected to the PLC2 controller. The PLC2 controller receives signals from the sodium meter, ammonium meter, second pH meter, second conductivity meter and ninth electric valve, and controls the switch of the ninth electric valve according to the signals from the sodium meter, ammonium meter, second pH meter and second conductivity meter.

[0016] The technical solution of the utility model has the following advantages:

[0017] The utility model provides a condensate polishing resin regeneration system, which can track and monitor the ion concentration indicators of the eluent in the regeneration process of the cation tower cation resin and the anion tower anion resin by using an online meter, and judge the regeneration end point from the tracking indicators; when the system judges the regeneration end point of the cation resin and the anion resin, the system automatically stops introducing acid and alkali, which can save water consumption and acid and alkali consumption; the system stops introducing acid and alkali after automatically judging the regeneration end point, ensures the complete regeneration effect each time, prolongs the cycle water production of the polishing mixed bed, reduces the number of polishing resin regeneration times, indirectly reduces the water consumption and acid and alkali consumption of regeneration, and simultaneously reduces the wastewater discharge and treatment volume; the whole system design has the characteristics of online monitoring, automatic judgment, high safety and obvious energy saving and consumption reduction, and is suitable for industrial promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model.

[0020] Description of reference numerals;

[0021] 1. Separation tower; 2. Yin tower; 3. Yang tower; 4. First resin delivery pipe; 5. First electric valve; 6. Second resin delivery pipe; 7. Fourth electric valve; 8. Third resin output pipe; 9. Fifth electric valve; 10. Fourth resin output pipe; 11. Seventh electric valve; 12. Fifth resin output pipe; 13. Tenth electric valve; 14. Yin resin delivery pipe; 15. Second electric valve; 16. Yin tower water outlet pipe; 17. Eighth electric valve; 18. First sampling pipe; 19. First manual valve; 20 , the positive tower outlet pipe; 21, the eleventh electric valve; 22, the second sampling tube; 23, the second manual valve; 24, the sewage pipe; 25, the alkali inlet pipe; 26, the sixth electric valve; 27, the acid inlet pipe; 28, the ninth electric valve; 29, the chlorine meter; 30, the phosphorus meter; 31, the first pH meter; 32, the first conductivity meter; 33, the sodium meter; 34, the ammonium meter; 35, the second pH meter; 36, the second conductivity meter; 37, the PLC1 controller; 38, the PLC2 controller; 39, the third electric valve. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example

[0027] like Figure 1 A specific embodiment of a condensate polishing resin regeneration system is shown, which comprises: a separation tower 1, a negative tower 2 and a positive tower 3, and a first resin delivery pipe 4 that can deliver spent mixed fat to the separation tower 1, wherein the separation tower 1 is connected to the bottom of the negative tower 2 and the upper part of the positive tower 3 respectively through a second resin delivery pipe 6, the second resin delivery pipe 6 is connected to the first resin delivery pipe 4, and the middle part of the separation tower 1 is connected to the upper part of the negative tower 2 through a negative resin delivery pipe 14;

[0028] The anion tower 2 is connected to a chlorine meter 29 , a phosphorus meter 30 , a first pH meter 31 and a first conductivity meter 32 , and the cation tower 3 is connected to a sodium meter 33 , an ammonium meter 34 , a second pH meter 35 and a second conductivity meter 36 .

[0029] Furthermore, a first electric valve 5 is installed on the first resin delivery pipe 4, and the first electric valve 5 is located between the second resin delivery pipe 6 and the separation tower 1. A second electric valve 15 is installed on the anion resin delivery pipe 14, and a third electric valve 39 and a fourth electric valve 7 are installed on the second resin delivery pipe 6, and the third electric valve 39 is located between the first resin delivery pipe 4 and the separation tower 1, and the fourth electric valve 7 is located between the anion tower 2 and the yang tower 3. The bottom of the separation tower 1 is connected to the second resin delivery pipe 6 through a third resin output pipe 8, and a fifth electric valve 9 is installed on the third resin output pipe 8.

[0030] Furthermore, the spent mixed fat is hydraulically stratified in the separation tower 1 to form an anion resin at the top and a cation resin at the bottom. The anion resin at the top of the separation tower 1 is transferred to the anion tower 2 via the anion resin transfer pipe 14, and the cation resin at the bottom of the separation tower 1 is transferred to the cation tower 3 via the second resin transfer pipe 6.

[0031] Furthermore, an alkali inlet pipe 25 is connected to the upper part of the annulus tower 2, and a sixth electric valve 26 is installed on the alkali inlet pipe 25; a fourth resin output pipe 10 and an annulus tower water outlet pipe 16 are arranged at the bottom of the annulus tower 2; one end of the fourth resin output pipe 10 is connected to the bottom of the annulus tower 2, and the other end is connected to the second resin transfer pipe 6, and a seventh electric valve 11 is installed on the fourth resin output pipe 10; one end of the annulus tower water outlet pipe 16 is connected to the bottom of the annulus tower 2, and the other end is connected to the sewage pipe 24, and an eighth electric valve 17 is installed on the annulus tower water outlet pipe 16; the end of the annulus tower water outlet pipe 16 away from the annulus tower 2 is connected to a first sampling pipe 18, and a first manual valve 19 is installed on the first sampling pipe 18.

[0032] Furthermore, the chlorine meter 29 , the phosphorus meter 30 , the first pH meter 31 and the first conductivity meter 32 are all connected to the end of the first sampling tube 18 away from the anion tower 2 .

[0033] Furthermore, an acid inlet pipe 27 is connected to the upper part of the positive tower 3, and a ninth electric valve 28 is installed on the acid inlet pipe 27; a fifth resin output pipe 12 and a positive tower water outlet pipe 20 are arranged at the bottom of the positive tower 3; one end of the fifth resin output pipe 12 is connected to the bottom of the positive tower 3, and the other end is connected to the second resin transfer pipe 6, and a tenth electric valve 13 is installed on the fifth resin output pipe 12; one end of the positive tower water outlet pipe 20 is connected to the bottom of the positive tower 3, and the other end is connected to the sewage pipe 24, and an eleventh electric valve 21 is installed on the positive tower water outlet pipe 20; a second sampling pipe 22 is connected to the end of the positive tower water outlet pipe 20 away from the positive tower 3, and a second manual valve 23 is installed on the second sampling pipe 22.

[0034] Furthermore, the sodium meter 33 , the ammonium meter 34 , the second pH meter 35 and the second conductivity meter 36 are all connected to the end of the second sampling tube 22 away from the cathodic tower 3 .

[0035] Furthermore, it also includes a PLC1 controller 37. The chlorine meter 29, the phosphorus meter 30, the first pH meter 31, the first conductivity meter 32 and the sixth electric valve 26 are all connected to the PLC1 controller 37. The PLC1 controller 37 receives signals from the chlorine meter 29, the phosphorus meter 30, the first pH meter 31, the first conductivity meter 32 and the sixth electric valve 26, and controls the switch of the sixth electric valve 26 according to the signals from the chlorine meter 29, the phosphorus meter 30, the first pH meter 31 and the first conductivity meter 32.

[0036] Furthermore, it also includes a PLC2 controller 38, and the sodium meter 33, ammonium meter 34, second pH meter 35, second conductivity meter 36 and ninth electric valve 28 are all connected to the PLC2 controller 38. The PLC2 controller 38 receives signals from the sodium meter 33, ammonium meter 34, second pH meter 35, second conductivity meter 36 and ninth electric valve 28, and controls the switch of the ninth electric valve 28 according to the signals from the sodium meter 33, ammonium meter 34, second pH meter 35 and second conductivity meter 36.

[0037] The working process of the above-mentioned condensate polishing resin regeneration system is as follows:

[0038] The failed mixed fat enters the separation tower: the third electric valve 39, the fifth electric valve 9 and the second electric valve 15 are closed, and the first electric valve 5 is opened. The failed mixed fat passes through the first resin delivery pipe 4 to the separation tower 1; after the failed mixed fat is delivered, the first electric valve 5 is closed.

[0039] Backwashing and stratification of the separation tower: close the first electric valve 5, the fifth electric valve 9 and the second electric valve 15; after the mixed fat in the separation tower 1 is scrubbed with air, backwashing and stratification are performed (some pipeline valves in the separation tower 1 are not drawn), the upper part of the separation tower 1 is the anion resin, and the lower part of the separation tower 1 is the cation resin. The dividing line between the anion and anion resins is located 10-20 cm below the height position where the separation tower 1 is connected to the anion resin transfer pipe 14.

[0040] Anion resin is transported to the anion tower: the seventh electric valve 11, the first manual valve 19, and the sixth electric valve 26 are closed, and the second electric valve 15 and the eighth electric valve 17 are opened. The anion resin on the upper part of the separation tower 1 is hydraulically transported to the anion tower 2 through the anion resin transfer pipe 14, and the drainage in the anion tower 2 is discharged from the anion tower outlet pipe 16 through the sewage pipe 24; after the anion resin above the height of the anion resin transfer pipe 14 in the separation tower 1 is transferred, the second electric valve 15 and the eighth electric valve 17 are closed.

[0041] Cationic resin is transported to the cationic tower: the second electric valve 15, the seventh electric valve 11, the eighth electric valve 17, the sixth electric valve 26, the tenth electric valve 13, the ninth electric valve 28 and the second manual valve 23 are closed, and the first electric valve 5, the third electric valve 39, the fifth electric valve 9, the fourth electric valve 7 and the eleventh electric valve 21 are opened. The cationic resin at the bottom of the separation tower 1 is transported to the cationic tower 3 through the third resin output pipe 8 and the second resin transmission pipe 6, and the drainage in the cationic tower 3 is discharged from the cationic tower outlet pipe 20 through the sewage pipe 24; when the interface between the cationic and cationic resins in the separation tower 1 reaches the photoelectric signal alarm, the transmission of the cationic resin is stopped (some pipeline valves and photoelectric signal equipment of the separation tower 1 are not drawn), and the first electric valve 5, the third electric valve 39, the fifth electric valve 9, the fourth electric valve 7 and the eleventh electric valve 21 are closed.

[0042] Scrubbing the resin in the cathode tower: close the second electric valve 15, the seventh electric valve 11, the sixth electric valve 26 and the first manual valve 19, and open the eighth electric valve 17; the cathode grease in the cathode tower 2 is scrubbed with air and water, and the drainage is discharged from the cathode tower outlet pipe 16 through the sewage pipe 24. After scrubbing for a certain period of time, stop (some pipeline valves of the cathode tower 2 are not drawn), and close the eighth electric valve 17.

[0043] Scrubbing the resin in the yang tower: close the ninth electric valve 28, the tenth electric valve 13 and the second manual valve 23, and open the eleventh electric valve 21; the yang resin in the yang tower 3 is scrubbed with air and water, and the drainage is discharged from the yang tower outlet pipe 20 through the sewage pipe 24. After scrubbing for a certain period of time, stop (some pipeline valves of the yang tower 3 are not drawn), and close the eleventh electric valve 21.

[0044] Resin regeneration in the anion tower: close the second electric valve 15, the seventh electric valve 11, and the sixth electric valve 26; open the eighth electric valve 17 and the first manual valve 19; put the chlorine meter 29, the phosphorus meter 30, the first pH meter 31, the first conductivity meter 32 and the PLC1 controller 37 into operation. Open the sixth electric valve 26, and the alkali solution of a certain temperature, flow rate and concentration enters the anion tower 2 to regenerate the anion resin. The chlorine meter 29, the phosphorus meter 30, the first pH meter 31 and the first conductivity meter 32 respectively detect the index data of the anion resin regeneration eluent, and transmit the detection data to the PLC1 controller 37. The PLC1 controller 37 receives all the data and generates a curve chart of the change of each index. When the PLC1 controller 37 monitors that the chlorine content, phosphate, pH value and conductivity in the eluent have reached the highest value, they have dropped to the lowest point for a period of time and remain stable. At this time, the anion resin is completely regenerated, and the alkali solution can be stopped. The PLC1 controller 37 automatically closes the sixth electric valve 26 and the eighth electric valve 17.

[0045] Resin regeneration in the cation tower: close the fourth electric valve 7, the tenth electric valve 13, and the ninth electric valve 28; open the eleventh electric valve 21 and the second manual valve 23; put the sodium meter 33, the ammonium meter 34, the second pH meter 35, the second conductivity meter 36 and the PLC2 controller 38 into operation. Open the ninth electric valve 28, and a certain flow and concentration of acid solution enters the cation tower 3 to regenerate the cation resin. The sodium meter 33, the ammonium meter 34, the second pH meter 35 and the second conductivity meter 36 detect the index data of the cation resin regeneration eluent, and transmit the detection data to the PLC2 controller 38. The PLC2 controller 38 receives all the data and generates a curve chart of the change of each index. When the PLC2 controller 38 monitors that the sodium content, ammonium concentration, pH value and conductivity in the eluent have reached the highest value, they have dropped to the lowest point for a period of time and remain stable. At this time, the cation resin is completely regenerated, and the acid solution can be stopped. The PLC2 controller 38 automatically closes the ninth electric valve 28 and the eleventh electric valve 21.

[0046] Resin replacement and positive washing of the anion tower: "alkali solution of a certain temperature, flow rate and concentration is replaced by desalted water of a certain temperature and flow rate", that is, no alkali is added to the desalted water in the anion tower, and other operations are the same as the "resin regeneration in the anion tower" process. When the PLC1 controller 37 detects that the chlorine content, phosphate, pH value and conductivity in the eluent have reached a low point and remain stable, the process can be stopped, and the PLC1 controller 37 automatically closes the sixth electric valve 26 and the eighth electric valve 17.

[0047] Resin replacement and positive washing in the positive tower: "acid solution of a certain flow rate and concentration is replaced by desalted water of a certain flow rate", that is, no acid is added to the desalted water entering the positive tower, and other operations are the same as the "resin regeneration in the positive tower" process. When the PLC2 controller 38 detects that the sodium content, ammonium concentration, pH value and conductivity in the eluent have dropped to the lowest point and remain stable, the process can be stopped, and the PLC2 controller 38 automatically closes the ninth electric valve 28 and the eleventh electric valve 21.

[0048] The anion resin in the anion tower is transported to the yang tower: close the second electric valve 15, the sixth electric valve 26, the eighth electric valve 17, the first electric valve 5, the fifth electric valve 9, the third electric valve 39, the tenth electric valve 13, and the ninth electric valve 28; open the sixth electric valve 26, the seventh electric valve 11, the fourth electric valve 7, and the eleventh electric valve 21; a certain flow of deionized water without alkali is passed through the alkali inlet pipe 25 into the anion tower 2; the anion resin in the anion tower 2 is passed through the fourth resin output pipe 10 and the second resin transfer pipe 6 to the yang tower 3; when the anion resin in the anion tower 2 is completely transferred, stop adding deionized water through the alkali inlet pipe 25; and close the sixth electric valve 26, the seventh electric valve 11, the fourth electric valve 7, and the eleventh electric valve 21.

[0049] Mixing fat in the positive tower: close the fourth electric valve 7, the ninth electric valve 28, the tenth electric valve 13 and the second manual valve 23, open the eleventh electric valve 21, mix the positive and negative resins in the positive tower 3 through backwashing water, and after backwashing for a certain period of time, the upper top pressure drainage is discharged through the positive tower outlet pipe 20 and the sewage pipe 24 to drain all the water in the positive tower 3 (some pipeline valves of the positive tower 3 are not drawn).

[0050] Mixed fat positive washing in the positive tower: close the fourth electric valve 7 and the tenth electric valve 13, open the eleventh electric valve 21, the ninth electric valve 28, and the second manual valve 23, and a certain flow of deionized water without acid is passed through the acid inlet pipe 27 to enter the positive tower 3, and the second conductivity meter 36 and the PLC2 controller 38 are put into operation. The drainage in the positive tower 3 is discharged through the positive tower outlet pipe 20 and the sewage pipe 24. When the PLC2 controller 38 monitors that the conductivity in the positive washing water has dropped to the lowest point and remains stable, the positive washing is complete at this time, and the deionized water can be stopped. The PLC2 controller 38 automatically controls the closing of the ninth electric valve 28 and the eleventh electric valve 21. At this point, the mixed positive and negative resins in the positive tower 3 have been completely regenerated and are in standby mode.

[0051] The spare resin is transferred to the operating mixed bed: the first electric valve 5, the fifth electric valve 9, the seventh electric valve 11, the eleventh electric valve 21 and the fourth electric valve 7 are closed, and the ninth electric valve 28, the tenth electric valve 13 and the third electric valve 39 are opened. A certain flow of deionized water without acid is passed through the acid inlet pipe 27 into the positive tower 3, and the mixed fat in the positive tower 3 is passed through the fifth resin output pipe 12, the second resin transfer pipe 6 and the first resin transfer pipe 4 to the operating mixed bed. When the mixed fat in the positive tower 3 is completely transferred, the ninth electric valve 28, the tenth electric valve 13 and the third electric valve 39 can be closed.

[0052] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A condensate polishing resin regeneration system, characterized in that: include: A separation tower (1), a negative tower (2) and a positive tower (3), and a first resin delivery pipe (4) capable of delivering spent mixed fat to the separation tower (1); the separation tower (1) is connected to the bottom of the negative tower (2) and the top of the positive tower (3) respectively through a second resin delivery pipe (6); the second resin delivery pipe (6) is connected to the first resin delivery pipe (4); and the middle of the separation tower (1) is connected to the top of the negative tower (2) through a negative resin delivery pipe (14); The anion tower (2) is connected to a chlorine meter (29), a phosphorus meter (30), a first pH meter (31) and a first conductivity meter (32), and the cation tower (3) is connected to a sodium meter (33), an ammonium meter (34), a second pH meter (35) and a second conductivity meter (36).

2. The condensate polishing resin regeneration system according to claim 1, characterized in that: A first electric valve (5) is installed on the first resin delivery pipe (4), and the first electric valve (5) is located between the second resin delivery pipe (6) and the separation tower (1). A second electric valve (15) is installed on the anion resin delivery pipe (14), and a third electric valve (39) and a fourth electric valve (7) are installed on the second resin delivery pipe (6). The third electric valve (39) is located between the first resin delivery pipe (4) and the separation tower (1), and the fourth electric valve (7) is located between the anion tower (2) and the yang tower (3). The bottom of the separation tower (1) is connected to the second resin delivery pipe (6) through a third resin output pipe (8), and a fifth electric valve (9) is installed on the third resin output pipe (8).

3. The condensate polishing resin regeneration system according to claim 1, characterized in that: The spent mixed fat is hydraulically stratified in the separation tower (1) to form an anion resin at the top and a cation resin at the bottom. The anion resin at the top of the separation tower (1) is transferred to the anion tower (2) via an anion resin transfer pipe (14), and the cation resin at the bottom of the separation tower (1) is transferred to the cation tower (3) via a second resin transfer pipe (6).

4. The condensate polishing resin regeneration system according to claim 1, characterized in that: The upper part of the annulus tower (2) is connected to an alkali inlet pipe (25), and a sixth electric valve (26) is installed on the alkali inlet pipe (25); a fourth resin output pipe (10) and an annulus tower water outlet pipe (16) are arranged at the bottom of the annulus tower (2); one end of the fourth resin output pipe (10) is connected to the bottom of the annulus tower (2), and the other end is connected to the second resin transmission pipe (6), and a seventh electric valve (11) is installed on the fourth resin output pipe (10); one end of the annulus tower water outlet pipe (16) is connected to the bottom of the annulus tower (2), and the other end is connected to the sewage pipe (24), and an eighth electric valve (17) is installed on the annulus tower water outlet pipe (16); the end of the annulus tower water outlet pipe (16) away from the annulus tower (2) is connected to a first sampling pipe (18), and a first manual valve (19) is installed on the first sampling pipe (18).

5. The condensate polishing resin regeneration system according to claim 4, characterized in that: The chlorine meter (29), the phosphorus meter (30), the first pH meter (31) and the first conductivity meter (32) are all connected to the end of the first sampling tube (18) away from the anion tower (2).

6. The condensate polishing resin regeneration system according to claim 4, characterized in that: The upper part of the yang tower (3) is connected to an acid inlet pipe (27), and a ninth electric valve (28) is installed on the acid inlet pipe (27); a fifth resin output pipe (12) and a yang tower water outlet pipe (20) are arranged at the bottom of the yang tower (3); one end of the fifth resin output pipe (12) is connected to the bottom of the yang tower (3), and the other end is connected to the second resin transmission pipe (6), and a tenth electric valve (13) is installed on the fifth resin output pipe (12); one end of the yang tower water outlet pipe (20) is connected to the bottom of the yang tower (3), and the other end is connected to the sewage pipe (24), and an eleventh electric valve (21) is installed on the yang tower water outlet pipe (20); the end of the yang tower water outlet pipe (20) away from the yang tower (3) is connected to a second sampling pipe (22), and a second manual valve (23) is installed on the second sampling pipe (22).

7. The condensate polishing resin regeneration system according to claim 6, characterized in that: The sodium meter (33), the ammonium meter (34), the second pH meter (35) and the second conductivity meter (36) are all connected to the end of the second sampling tube (22) away from the cathode tower (3).

8. The condensate polishing resin regeneration system according to claim 4, characterized in that: The invention also includes a PLC1 controller (37), and the chlorine meter (29), the phosphorus meter (30), the first pH meter (31), the first conductivity meter (32) and the sixth electric valve (26) are all connected to the PLC1 controller (37). The PLC1 controller (37) receives signals from the chlorine meter (29), the phosphorus meter (30), the first pH meter (31), the first conductivity meter (32) and the sixth electric valve (26), and controls the switch of the sixth electric valve (26) according to the signals from the chlorine meter (29), the phosphorus meter (30), the first pH meter (31) and the first conductivity meter (32).

9. The condensate polishing resin regeneration system according to claim 6, characterized in that: The invention also includes a PLC2 controller (38), and the sodium meter (33), the ammonium meter (34), the second pH meter (35), the second conductivity meter (36) and the ninth electric valve (28) are all connected to the PLC2 controller (38). The PLC2 controller (38) receives signals from the sodium meter (33), the ammonium meter (34), the second pH meter (35), the second conductivity meter (36) and the ninth electric valve (28), and controls the switch of the ninth electric valve (28) according to the signals from the sodium meter (33), the ammonium meter (34), the second pH meter (35) and the second conductivity meter (36).

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