A treatment system for resin regeneration wastewater in thermal power plants

Abstract

The present invention provides a treatment system for resin regeneration wastewater in a thermal power plant, which relates to the technical field of wastewater treatment. The system comprises a wastewater collection module, a sedimentation treatment module, a flotation treatment module, a filtration module, a reverse osmosis treatment module, a concentration module and an electrolysis treatment module, which are connected in sequence to form a complete treatment process for resin regeneration wastewater in a thermal power plant. Through the joint action of each module, effective treatment of resin regeneration wastewater in the thermal power plant is achieved; at the same time, effective treatment of resin regeneration wastewater is achieved, and the treated product can be reused for resin regeneration, thereby reducing pollution to the environment and achieving recycling of resources. Therefore, the above invention achieves standard discharge or resource utilization of wastewater through an efficient and environmentally friendly wastewater treatment system, which is of great significance for promoting the green development of thermal power plants.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a treatment system for resin regeneration wastewater in a thermal power plant. Background Art

[0002] During the operation of the power plant, resin plays an important role in water treatment, including softening water, desalination, removal of heavy metal ions, organic matter, odor, color, etc. What is needed is to regenerate the resin for repeated use to save resources and reduce production costs. However, a certain amount of wastewater will be generated during the resin regeneration process. The wastewater mainly comes from backwash wastewater, salt absorption wastewater, slow wash and fast flushing wastewater.

[0003] At present, resin regeneration produces a large amount of wastewater containing high concentrations of salt, organic matter and trace amounts of heavy metals. If these wastewaters are discharged directly, they will not only pollute the environment, but also waste the water resources and potential useful substances in them. The existing technology cannot effectively remove pollutants in wastewater through multi-stage treatment processes, and it is difficult to recover the useful substances contained in them, so as to achieve standard discharge or resource utilization of wastewater. Therefore, it is urgent to design a treatment system for resin regeneration wastewater in thermal power plants to solve the above problems. Summary of the invention

[0004] The present invention provides a treatment system for resin regeneration wastewater in a thermal power plant, which is used to solve at least one of the problems raised by the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a treatment system for resin regeneration wastewater in a thermal power plant, comprising:

[0006] Wastewater collection module, used to collect wastewater generated during the resin regeneration process of thermal power plants;

[0007] Sedimentation treatment module, adding CaCl to wastewater 2 and NaOH to precipitate calcium ions, magnesium ions, sulfate and silicate in wastewater;

[0008] The flotation treatment module introduces the supernatant and flocculant after precipitation into the auxiliary treatment device to form flocculation precipitation;

[0009] A filtration module, which pumps the supernatant treated by the flotation treatment module to a filter for filtration;

[0010] The reverse osmosis treatment module introduces the filtered water into the reverse osmosis device for concentration, and the resulting diluted liquid is stored in a water tank for backwashing;

[0011] Concentration module, which introduces the concentrated liquid after reverse osmosis treatment into a rotary film evaporator to form a saturated NaCl solution, and the obtained diluted liquid is stored in a condensation water tank for liquid preparation;

[0012] The electrolytic treatment module introduces the saturated NaCl solution formed in the concentration module into the electrolyzer for electrolysis. The gas generated by the anode and cathode is passed into the synthesis tower to react and generate HCl. The residual material in the electrolytic cell is reused as NaOH solution for resin regeneration.

[0013] Preferably, the flocculant is polyaluminium chloride, polyacrylamide or a mixture of the two.

[0014] Preferably, the filter in the filtration module is a security filter, the reverse osmosis device in the reverse osmosis treatment module is equipped with a reverse osmosis loose membrane dedicated to concentrated water, and the electrolytic cell in the electrolytic treatment module is a vertical diaphragm electrolytic cell.

[0015] Preferably, the auxiliary treatment device comprises: a box body, a filter box and a sedimentation box are arranged inside the box body, the filter box is fixedly installed at the top of the box body, the sedimentation box is fixedly installed at the bottom of the box body, and the water outlet at the bottom of the filter box is connected with the water inlet at the top of the sedimentation box through a first water pipe, a valve 1 is arranged on the first water pipe, a coagulation and sedimentation mechanism is arranged on one side of the box body, and the coagulation and sedimentation mechanism is connected with the water outlet of the sedimentation box through a second water pipe;

[0016] A coarse filter screen, a quartz sand filter screen and an activated carbon adsorption layer are sequentially arranged in the filter box from top to bottom, and both sides of the coarse filter screen, the quartz sand filter screen and the activated carbon adsorption layer are fixedly connected to the inner wall of the filter box.

[0017] Preferably, a feeding box one and a feeding box two are fixedly installed on the top of the sedimentation tank, and the discharge ports of the feeding box one and the feeding box two are connected to the feeding port of the sedimentation tank. The water pump is fixedly installed on the side wall of the sedimentation tank through a mounting plate one, and the water pump is connected to the second water pipe.

[0018] Preferably, the coagulation and sedimentation mechanism includes a waste residue recovery box, which is fixedly installed at the bottom of the box body, a processing box is fixedly installed at the top of the waste residue recovery box, and a mixing box is fixedly installed on the top of the processing box, and the storage box is arranged on one side of the waste residue recovery box, and the first liquid storage tank and the second liquid storage tank are fixedly installed on the inner wall of the box body through a second mounting plate, and the liquid outlets at the bottom of the first liquid storage tank and the second liquid storage tank are connected to the top liquid inlet of the mixing box through a first infusion pipe and a second infusion pipe respectively, and a pressure pump is connected to the first infusion pipe and the second infusion pipe respectively, and one end of the stirring rod rotates through the side wall of the mixing box and then a first driven pulley is fixedly installed thereon, and a valve 2 is provided at the connection between the bottom water outlet of the mixing box and the water inlet at the top of the processing box.

[0019] Preferably, it also includes a driving motor, which is fixedly mounted on the processing box, and the output shaft of the driving motor is fixedly mounted with a driving shaft, a support plate is fixedly mounted on the top of the processing box, and one end of the driving shaft rotates through the support plate and is fixedly mounted with a first driving pulley, a second driving pulley is fixedly mounted on the driving shaft, the second driving pulley is connected to the first driven pulley through a first belt, one end of the spiral feeding rod rotates through the side wall of the processing box and is fixedly mounted with a second driven pulley, and the first driving pulley is connected to the second driven pulley through a second belt.

[0020] Preferably, it also includes a fixing plate, which is fixedly installed on the inner walls on both sides of the processing box, and the filter screen is embedded in the fixing plate, the two sides of the partition are respectively fixedly connected to the fixing plate and the top of the processing box, the servo motor is fixedly installed on the top of the processing box, the output shaft of the servo motor is fixedly installed with a cam, and the connecting rod 1 slides through the partition and is hinged with the connecting rod 2, one end of the connecting rod 2 is hinged to the cam away from the center, and a scraper is fixedly installed on one end of the connecting rod 1, and the bottom of the scraper contacts with the top of the filter screen.

[0021] Preferably, it also includes a concentration performance detection device for detecting the working state of the rotary film evaporator when the liquid to be concentrated is introduced into the rotary film evaporator to form a saturated NaCl solution, and the concentration performance detection device includes:

[0022] Mass flow meter, used to detect the mass of water vapor produced by the rotary film evaporator per unit time;

[0023] A mass sensor, used to detect the mass of the liquid to be concentrated remaining after the rotary film evaporator works for a unit time;

[0024] Temperature sensor 1, used to detect the temperature of the liquid to be concentrated in the rotary film evaporator;

[0025] Temperature sensor 2, used to detect the temperature of the remaining liquid to be concentrated after the rotary film evaporator works for a unit time;

[0026] Temperature sensor three, used to detect the temperature of high-pressure steam when it enters the rotary film evaporator;

[0027] Temperature sensor 4, used to detect the temperature of high-pressure steam output by the rotary film evaporator after a unit of working time;

[0028] A controller and an alarm, wherein the controller is electrically connected to a mass flow meter, a mass sensor, a temperature sensor 1, a temperature sensor 2, a temperature sensor 3, a temperature sensor 4 and the alarm, and the controller controls the operation of the alarm based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4.

[0029] Preferably, the controller controls the alarm to work based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4, comprising the following steps:

[0030] According to the following formula and the detection values ​​of the mass flow meter, mass sensor, temperature sensor 1, temperature sensor 2, temperature sensor 3 and temperature sensor 4, the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time is calculated, and the controller compares the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time with a preset total heat transfer coefficient range. If the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time is not within the preset total heat transfer coefficient range, the controller controls the alarm to sound an alarm;

[0031]

[0032] Where W is the total heat transfer coefficient of the rotary film evaporator per unit time when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution, C p is the constant pressure specific heat capacity of the liquid to be concentrated, M 1 M is the detection value of the mass flow meter for the water vapor mass produced by the rotary film evaporator in unit time. 2 is the detection value of the mass sensor for the remaining concentrated liquid mass after the rotary film evaporator works for a unit time, T 0 is the saturation temperature of water vapor, t 1 is the detected value of the temperature of the liquid to be concentrated in the rotary film evaporator delivered by the temperature sensor, t 2 is the detection value of the temperature of the remaining concentrated liquid after the rotary film evaporator works for a unit time by the temperature sensor 2, R is the latent heat of vaporization of water, A is the total area of ​​evaporation heat transfer in the rotary film evaporator, δ is the unit time, T 1 is the temperature value detected by the temperature sensor when the high-pressure steam enters the rotary film evaporator, T 2 It is the detection value of the temperature sensor on the high-pressure steam output temperature of the rotary film evaporator after a unit of working time.

[0033] The present invention provides a treatment system for resin regeneration wastewater in a thermal power plant. Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The above-mentioned thermal power plant resin regeneration wastewater treatment system is connected in sequence through the wastewater collection module, sedimentation treatment module, flotation treatment module, filtration module, reverse osmosis treatment module, concentration module and electrolysis treatment module, forming a complete thermal power plant resin regeneration wastewater treatment process. Through the joint action of each module, the effective treatment of the thermal power plant resin regeneration wastewater is achieved; at the same time, the resin regeneration wastewater is effectively treated, and the treated product can be reused for resin regeneration, thereby reducing pollution to the environment and realizing the recycling of resources.

[0035] 2. The auxiliary treatment device mentioned above can realize the pretreatment of wastewater. First, it can remove suspended matter, organic matter and microorganisms in the wastewater to prevent clogging of subsequent treatment equipment; second, it can form flocs through coagulation, and then remove suspended matter, colloids and some soluble organic matter in the wastewater by sedimentation, thereby reducing the pollution of wastewater discharge to the environment and complying with the concept of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a system for treating resin regeneration wastewater from a thermal power plant provided by an embodiment of the present invention;

[0038] Figure 2 A schematic structural diagram of an auxiliary treatment device of a treatment system for resin regeneration wastewater in a thermal power plant provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the internal structure of a treatment box of a treatment system for resin regeneration wastewater in a thermal power plant provided by an embodiment of the present invention.

[0040] Reference numerals:

[0041] 1. Auxiliary treatment device; 2. Box; 3. Filter box; 4. Sedimentation box; 5. First water pipe; 6. Valve 1; 7. Coagulation and sedimentation mechanism; 8. Second water pipe; 9. Coarse filter; 10. Quartz sand filter; 11. Activated carbon adsorption layer; 12. Feeding box 1; 13. Feeding box 2; 14. Water pump; 15. Mounting plate 1; 16. Waste residue recovery box; 17. Treatment box; 18. Mixing box; 19. First liquid storage tank; 20. Second liquid storage tank; 21. First liquid infusion pipe; 22. Second liquid infusion pipe; 23. Pressure pump; 24, mounting plate 2; 25, stirring rod; 26, first driven pulley; 27, valve 2; 28, driving motor; 29, driving shaft; 30, supporting plate; 31, first driving pulley; 32, second driving pulley; 33, first belt; 34, spiral feeding rod; 35, second driven pulley; 36, second belt; 37, fixing plate; 38, filter screen; 39, partition; 40, servo motor; 41, cam; 42, connecting rod 1; 43, connecting rod 2; 44, scraper; 45, storage box. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The present invention provides the following embodiments

[0044] Example 1

[0045] The embodiment of the present invention provides a system for treating resin regeneration wastewater in a thermal power plant, such as Figure 1 As shown, including:

[0046] Wastewater collection module, used to collect wastewater generated during the resin regeneration process of thermal power plants;

[0047] Sedimentation treatment module, adding CaCl to wastewater 2 and NaOH to precipitate calcium ions, magnesium ions, sulfate and silicate in wastewater;

[0048] The flotation treatment module introduces the supernatant liquid and flocculant after precipitation into the auxiliary treatment device to form flocculation precipitation, and the colloids and suspended matter in the water are separated from the water body to obtain the supernatant liquid, and the scum is removed from the surface of the water body;

[0049] A filtration module, which pumps the supernatant treated by the flotation treatment module to a filter for filtration;

[0050] The reverse osmosis treatment module introduces the filtered water into the reverse osmosis device for concentration, and the resulting diluted liquid is stored in a water tank for backwashing;

[0051] Concentration module, which introduces the concentrated liquid after reverse osmosis treatment into a rotary film evaporator to form a saturated NaCl solution, and the obtained diluted liquid is stored in a condensation water tank for liquid preparation;

[0052] The electrolytic treatment module introduces the saturated NaCl solution formed in the concentration module into the electrolyzer for electrolysis. The gas generated by the anode and cathode is passed into the synthesis tower to react and generate HCl. The residual material in the electrolytic cell is reused as NaOH solution for resin regeneration.

[0053] Preferably, the flocculant is polyaluminium chloride, polyacrylamide or a mixture of the two.

[0054] Preferably, the filter in the filtration module is a security filter, the reverse osmosis device in the reverse osmosis treatment module is equipped with a reverse osmosis loose membrane dedicated to concentrated water, and the electrolytic cell in the electrolytic treatment module is a vertical diaphragm electrolytic cell.

[0055] The working principle and beneficial effects of the above technical solution are:

[0056] The present invention discloses a system for treating wastewater from resin regeneration in a thermal power plant. The system comprises a wastewater collection module for collecting wastewater generated in the process of resin regeneration in the thermal power plant; a precipitation treatment module for adding CaCl 2and NaOH to precipitate calcium ions, magnesium ions, sulfate and silicate in the wastewater; an air flotation treatment module, introducing the supernatant and flocculant after precipitation into an auxiliary treatment device to form a flocculation precipitation, wherein the flocculant is polyaluminium chloride, polyacrylamide or a mixture of the two, and the colloid and suspended matter in the water are separated from the water body to obtain a supernatant, and the scum is removed from the surface of the water body; a filtration module, pumping the supernatant treated by the air flotation treatment module to the filter for filtration; a reverse osmosis treatment module, introducing the filtered water into the reverse osmosis device for concentration, and the obtained dilution is stored in the water tank for backwashing; a concentration module, introducing the concentrated solution after reverse osmosis treatment into a rotary film evaporator to form a saturated NaCl solution, and the obtained dilution is stored in a condensation water tank for liquid preparation; an electrolysis treatment module, introducing the saturated NaCl solution formed in the concentration module into an electrolyser for electrolysis, and the gas generated by the anode and the cathode is introduced into the synthesis tower to react to generate HCl, and the residual material in the electrolytic cell is reused as NaOH liquid preparation for resin regeneration. The filter in the filtration module is a security filter, which has a very high filtration accuracy and can effectively remove tiny impurities such as suspended particles, colloids, microorganisms, and organic fragments in the fluid. The reverse osmosis device in the reverse osmosis treatment module is equipped with a reverse osmosis loose membrane dedicated to concentrated water, which has a high selective permeability to solutes and can efficiently remove harmful substances in the water while retaining some minerals that are beneficial to the human body. The electrolytic cell in the electrolysis treatment module is a vertical diaphragm electrolytic cell, which can achieve high current density and high chemical reaction rate, and therefore has efficient electrolysis and ensures the stability and consistency of the electrolysis reaction.

[0057] The above-mentioned thermal power plant resin regeneration wastewater treatment system is connected in sequence through a wastewater collection module, a sedimentation treatment module, a flotation treatment module, a filtration module, a reverse osmosis treatment module, a concentration module and an electrolysis treatment module to form a complete thermal power plant resin regeneration wastewater treatment process. Through the joint action of each module, the effective treatment of the thermal power plant resin regeneration wastewater is achieved; at the same time, the resin regeneration wastewater is effectively treated, and the treated product can be reused for resin regeneration, thereby reducing pollution to the environment and realizing the recycling of resources. Therefore, the above-mentioned invention achieves standard discharge or resource utilization of wastewater through an efficient and environmentally friendly wastewater treatment system, which is of great significance for promoting the green development of thermal power plants.

[0058] Example 2

[0059] On the basis of Example 1, Figure 2As shown, the auxiliary treatment device 1 comprises: a box body 2, a filter box 3 and a sedimentation box 4 are arranged inside the box body 2, the filter box 3 is fixedly installed at the top of the box body 2, the sedimentation box 4 is fixedly installed at the bottom of the box body 2, and the water outlet at the bottom of the filter box 3 is connected with the water inlet at the top of the sedimentation box 4 through a first water pipe 5, a valve 6 is arranged on the first water pipe 5, a coagulation and sedimentation mechanism 7 is arranged on one side of the box body 2, and the coagulation and sedimentation mechanism 7 is connected with the water outlet of the sedimentation box 4 through a second water pipe 8;

[0060] The filter box 3 is provided with a coarse filter screen 9 , a quartz sand filter screen 10 and an activated carbon adsorption layer 11 in sequence from top to bottom, and both sides of the coarse filter screen 9 , the quartz sand filter screen 10 and the activated carbon adsorption layer 11 are fixedly connected to the inner wall of the filter box 3 .

[0061] Preferably, a feeding box 12 and a feeding box 2 13 are fixedly installed on the top of the sedimentation tank 4, and the discharge ports of the feeding box 12 and the feeding box 2 13 are connected to the feeding port of the sedimentation tank 4, and the water pump 14 is fixedly installed on the side wall of the sedimentation tank 4 through a mounting plate 15, and the water pump 14 is connected to the second water pipe 8.

[0062] The working principle and beneficial effects of the above technical solution are:

[0063] The filter box 3 and the sedimentation box 4 set by the auxiliary treatment device 1 can pre-treat the wastewater to be treated, effectively remove suspended matter, organic matter and microorganisms contained in the wastewater, prevent clogging of subsequent treatment equipment and affect the subsequent wastewater treatment process, and at the same time can precipitate calcium ions, magnesium ions, sulfate and silicate in the wastewater. By sequentially arranging a coarse filter screen 9, a quartz sand filter screen 10 and an activated carbon adsorption layer 11 in the filter box 3 from top to bottom, and the two sides of the coarse filter screen 9, the quartz sand filter screen 10 and the activated carbon adsorption layer 11 are fixedly connected to the inner wall of the filter box 3, the coarse filter screen 9 can effectively filter the large suspended particles and debris contained in the wastewater; the main principle of the quartz sand filter screen 10 is pressure filtration. When the incoming water flows through the quartz sand filter layer from top to bottom, the suspended matter, organic matter, colloidal particles, microorganisms and other impurities in the water are intercepted by the filter layer, thereby reducing the turbidity of the water and achieving the purpose of purifying the water quality. At the same time, the quartz sand filter material also has a certain adsorption effect, which can adsorb some heavy metal ions, chlorine, odor and other impurities in the water; the activated carbon adsorption layer 11 has a high-efficiency adsorption capacity and can remove a variety of pollutants in gas or liquid, such as organic matter, inorganic matter, heavy metal ions, etc. At the same time, the wastewater filtered by the filter element is transported to the sedimentation tank 4 through the first water pipe 5, and the CaCl 2and NaOH are added into the sedimentation box 4 to react with the waste water, thereby effectively removing the calcium ions, magnesium ions, sulfate and silicate in the waste water. The precipitated waste residue is discharged out of the box body 2 through the residue outlet arranged at the bottom of the sedimentation box 4.

[0064] Example 3

[0065] On the basis of Example 1 or 2, Figure 2-Figure 3 As shown, the coagulation and sedimentation mechanism 7 includes a waste residue recovery box 16, which is fixedly installed at the bottom of the box body 2, and a processing box 17 is fixedly installed on the top of the waste residue recovery box 16, and a mixing box 18 is fixedly installed on the top of the processing box 17, and the storage box 45 is arranged on one side of the waste residue recovery box 16, and a first liquid storage tank 19 and a second liquid storage tank 20 are fixedly installed on the inner wall of the box body 2 through a second mounting plate 24, and the liquid outlets at the bottom of the first liquid storage tank 19 and the second liquid storage tank 20 are respectively connected to the top liquid inlet of the mixing box 18 through a first infusion pipe 21 and a second infusion pipe 22, and a pressure pump 23 is connected to the first infusion pipe 21 and the second infusion pipe 22, respectively, and one end of the stirring rod 25 rotates through the side wall of the mixing box 18 and then a first driven pulley 26 is fixedly installed, and a valve 27 is provided at the connection between the bottom water outlet of the mixing box 18 and the water inlet at the top of the processing box 17.

[0066] Preferably, it also includes a driving motor 28, which is fixedly mounted on the processing box 17, and the output shaft of the driving motor 28 is fixedly mounted with a driving shaft 29, a support plate 30 is fixedly mounted on the top of the processing box 17, and one end of the driving shaft 29 rotates through the support plate 30 and is fixedly mounted with a first driving pulley 31, a second driving pulley 32 is fixedly mounted on the driving shaft 29, the second driving pulley 32 is connected to the first driven pulley 26 through a first belt 33, one end of a spiral feeding rod 34 rotates through the side wall of the processing box 17 and is fixedly mounted with a second driven pulley 35, and the first driving pulley 31 is connected to the second driven pulley 35 through a second belt 36.

[0067] Preferably, it also includes a fixing plate 37, which is fixedly installed on the inner walls on both sides of the processing box 17, and the filter screen 38 is embedded in the fixing plate 37, the two sides of the partition 39 are respectively fixedly connected to the fixing plate 37 and the top of the processing box 17, the servo motor 40 is fixedly installed on the top of the processing box 17, and the output shaft of the servo motor 40 is fixedly installed with a cam 41, and the connecting rod 1 42 slides through the partition and is hinged with a connecting rod 2 43, one end of the connecting rod 2 43 is hinged to the cam 41 away from the center, and a scraper 44 is fixedly installed on one end of the connecting rod 1 42, and the bottom of the scraper 44 contacts the top of the filter screen 38.

[0068] The working principle and beneficial effects of the above technical solution are:

[0069] The coagulation and sedimentation mechanism 7 arranged in the auxiliary treatment device 1 can transport the supernatant after precipitation in the sedimentation tank 4 to the treatment tank 17 through the second water pipe 8 and the water pump 14, and add a flocculant (such as polyaluminum chloride, polyacrylamide or a mixture of the two) to form flocculation precipitation. At the same time, the colloids and suspended matter in the water are separated in the flotation tank, and the scum is removed from the surface of the water to complete the removal. When the supernatant in the sedimentation tank 4 is transported to the mixing box 18, the first liquid storage tank 19 and the second liquid storage tank 20 are fixedly installed on the inner wall of the box body 2 through the second mounting plate 24, and the liquid outlets at the bottom of the first liquid storage tank 19 and the second liquid storage tank 20 are connected to the top liquid inlet of the mixing box 18 through the first infusion pipe 21 and the second infusion pipe 22 respectively, and the first infusion pipe 21 and the second infusion pipe 22 are respectively connected with a pressure pump 23, and the polyaluminum chloride and polyacrylamide stored in the first liquid storage tank 19 and the second liquid storage tank 20 are added to the mixing box 18 through the pressure pump 23, and the first driven pulley 26 and the second driving pulley 32 are connected to the second drive pulley 32 through the second belt 36 after one end of the stirring rod 25 rotates to penetrate the side wall of the mixing box 18. At this time, the stirring rod 25 is started. The driving motor 28 is driven, so that the first driving pulley 31 and the second driving pulley 32 fixedly connected to the output shaft of the driving motor 28 rotate synchronously, thereby driving the first driven pulley 26 to rotate, and at the same time, the stirring rod 25 connected to the first driven pulley 26 completes the full mixing of the supernatant and flocculant in the mixing box 18, and then the mixed liquid is transported to the treatment box 17 after opening the valve 27. At this time, the wastewater is filtered by the filter screen 38 embedded in the fixed plate 37, and then flows into the bottom of the treatment box 17, and then the sediment is formed in the wastewater. The first driving pulley 31 drives the second driven pulley 35 to rotate through the first belt 33, so that the spiral feeding rod 34 connected to the second driven pulley 35 transports the waste residue settled at the bottom of the treatment box 17 to the waste residue recovery box 16 for collection.

[0070] At the same time, the servo motor 40 arranged in the processing box 17 is started, and the output shaft of the servo motor 40 is fixedly installed with a cam 41. The connecting rod 1 42 slides through the partition and is hinged with a connecting rod 2 43. One end of the connecting rod 2 43 is hinged with the cam 41 away from the center. The cam 41, the connecting rod 1 42 and the connecting rod 2 43 form a cam 41 connecting rod mechanism, so that a scraper 44 is fixedly installed at one end of the connecting rod 1 42 for horizontal movement. The bottom of the scraper 44 contacts the top of the filter screen 38, thereby pushing the scum filtered by the filter screen 38 into the storage box 45.

[0071] Example 4

[0072] On the basis of Example 1, a concentration performance detection device is further included, which is used to detect the working state of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution. The concentration performance detection device includes:

[0073] Mass flow meter, used to detect the mass of water vapor produced by the rotary film evaporator per unit time;

[0074] A mass sensor, used to detect the mass of the liquid to be concentrated remaining after the rotary film evaporator works for a unit time;

[0075] Temperature sensor 1, used to detect the temperature of the liquid to be concentrated in the rotary film evaporator;

[0076] Temperature sensor 2, used to detect the temperature of the remaining liquid to be concentrated after the rotary film evaporator works for a unit time;

[0077] Temperature sensor three, used to detect the temperature of high-pressure steam when it enters the rotary film evaporator;

[0078] Temperature sensor 4, used to detect the temperature of high-pressure steam output by the rotary film evaporator after a unit of working time;

[0079] A controller and an alarm, wherein the controller is electrically connected to a mass flow meter, a mass sensor, a temperature sensor 1, a temperature sensor 2, a temperature sensor 3, a temperature sensor 4 and the alarm, and the controller controls the operation of the alarm based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4.

[0080] Preferably, the controller controls the alarm to work based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4, comprising the following steps:

[0081] According to the following formula and the detection values ​​of the mass flow meter, mass sensor, temperature sensor 1, temperature sensor 2, temperature sensor 3 and temperature sensor 4, the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time is calculated, and the controller compares the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time with a preset total heat transfer coefficient range. If the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time is not within the preset total heat transfer coefficient range, the controller controls the alarm to sound an alarm;

[0082]

[0083] Where W is the total heat transfer coefficient of the rotary film evaporator per unit time when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution, C p is the constant pressure specific heat capacity of the liquid to be concentrated (unit: J / (Kg·K)), M 1 M is the detection value of the mass flow meter for the water vapor mass produced by the rotary film evaporator in unit time. 2 is the detection value of the mass sensor for the remaining concentrated liquid mass after the rotary film evaporator works for a unit time, T 0 is the saturation temperature of water vapor (obtained by looking up the table), r 1 is the detected value of the temperature of the liquid to be concentrated in the rotary film evaporator delivered by the temperature sensor, t 2 is the detection value of the temperature of the remaining concentrated liquid after the rotary film evaporator works for a unit time by the temperature sensor 2, and R is the latent heat of vaporization of water (the value is 2.226×10 3 J / Kg), A is the total area of ​​evaporation heat transfer in the rotary film evaporator, δ is the unit time, T 1 is the temperature value detected by the temperature sensor when the high-pressure steam enters the rotary film evaporator, T 2 It is the detection value of the temperature sensor on the high-pressure steam output temperature of the rotary film evaporator after a unit of working time.

[0084] The beneficial effects of the above technical scheme are as follows: first, according to the formula and the detection values ​​of the mass flow meter, mass sensor, temperature sensor 1, temperature sensor 2, temperature sensor 3 and temperature sensor 4, the total heat transfer coefficient W of the rotary film evaporator when the liquid to be concentrated is introduced into the rotary film evaporator to form a saturated NaCl solution, the constant pressure specific heat capacity of the liquid to be concentrated, the mass of water vapor generated by the rotary film evaporator working per unit time, the mass of the liquid to be concentrated remaining after the rotary film evaporator works per unit time, the saturation temperature of water vapor, the temperature of the liquid to be concentrated transported to the rotary film evaporator, the temperature of the liquid to be concentrated remaining after the rotary film evaporator works per unit time, the latent heat of vaporization of water, the total area of ​​evaporation heat transfer in the rotary film evaporator, the temperature of the high-pressure steam when entering the rotary film evaporator, and the temperature of the high-pressure steam output by the rotary film evaporator after the working unit time are calculated per unit time, so that the calculation result is more accurate and reliable.

[0085] Secondly, the controller controls the alarm to work based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4. If the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution in the current unit time is not within the preset total heat transfer coefficient range, the controller controls the alarm to sound an alarm, thereby reminding the staff to check the rotary film evaporator in time, and perform maintenance on the rotary film evaporator according to the actual inspection results to maintain the use requirements of the rotary film evaporator for wastewater concentration, while ensuring the normal operation of the rotary film evaporator as a whole, and effectively improving the service life of the rotary film evaporator, and further meeting the use requirements of the rotary film evaporator for the reliability and stability of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution. By monitoring the working status of the rotary film evaporator in real time when concentrating the concentrated liquid in unit time, not only the concentration efficiency of the rotary film evaporator is improved, but also it is ensured that the rotary film evaporator can be quickly discovered and repaired in time after a fault occurs.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A treatment system for resin regeneration wastewater from a thermal power plant, characterized in that: include: Wastewater collection module, used to collect wastewater generated during the resin regeneration process of thermal power plants; The precipitation treatment module adds CaCl2 and NaOH to the wastewater to precipitate calcium ions, magnesium ions, sulfate and silicate in the wastewater; The flotation treatment module introduces the supernatant and flocculant after precipitation into the auxiliary treatment device to form flocculation precipitation; A filtration module, which pumps the supernatant treated by the flotation treatment module to a filter for filtration; The reverse osmosis treatment module introduces the filtered water into the reverse osmosis device for concentration, and the resulting diluted liquid is stored in a water tank for backwashing; Concentration module, which introduces the concentrated liquid after reverse osmosis treatment into a rotary film evaporator to form a saturated NaCl solution, and the obtained diluted liquid is stored in a condensation water tank for liquid preparation; The electrolytic treatment module introduces the saturated NaCl solution formed in the concentration module into the electrolyzer for electrolysis. The gas generated by the anode and cathode is passed into the synthesis tower to react and generate HCl. The residual material in the electrolytic cell is reused as NaOH solution for resin regeneration.

2. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 1, characterized in that: The flocculant is polyaluminium chloride, polyacrylamide or a mixture of the two.

3. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 1, characterized in that: The filter in the filtration module is a security filter, the reverse osmosis device in the reverse osmosis treatment module is equipped with a reverse osmosis loose membrane dedicated to concentrated water, and the electrolytic cell in the electrolytic treatment module is a vertical diaphragm electrolytic cell.

4. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 1, characterized in that: The auxiliary treatment device (1) comprises: a box body (2), wherein a filter box (3) and a sedimentation box (4) are arranged inside the box body (2), wherein the filter box (3) is fixedly installed at the top of the box body (2), and the sedimentation box (4) is fixedly installed at the bottom of the box body (2), and the water outlet at the bottom of the filter box (3) is connected to the water inlet at the top of the sedimentation box (4) through a first water pipe (5), and a valve (6) is arranged on the first water pipe (5), and a coagulation and sedimentation mechanism (7) is arranged on one side of the box body (2), and the coagulation and sedimentation mechanism (7) is connected to the water outlet of the sedimentation box (4) through a second water pipe (8); The filter box (3) is provided with a coarse filter screen (9), a quartz sand filter screen (10) and an activated carbon adsorption layer (11) in sequence from top to bottom, and both sides of the coarse filter screen (9), the quartz sand filter screen (10) and the activated carbon adsorption layer (11) are fixedly connected to the inner wall of the filter box (3).

5. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 4, characterized in that: A feeding box 1 (12) and a feeding box 2 (13) are fixedly installed on the top of the sedimentation box (4), and the discharge ports of the feeding box 1 (12) and the feeding box 2 (13) are connected to the feeding port of the sedimentation box (4). The water pump (14) is fixedly installed on the side wall of the sedimentation box (4) through a mounting plate 1 (15), and the water pump (14) is connected to the second water pipe (8).

6. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 4, characterized in that: The coagulation and sedimentation mechanism (7) comprises a waste residue recovery box (16), the waste residue recovery box (16) is fixedly mounted at the bottom of the box body (2), a processing box (17) is fixedly mounted on the top of the waste residue recovery box (16), and a mixing box (18) is fixedly mounted on the top of the processing box (17), the storage box (45) is arranged on one side of the waste residue recovery box (16), a first liquid storage tank (19) and a second liquid storage tank (20) are fixedly mounted on the inner wall of the box body (2) via a second mounting plate (24), and the first liquid storage tank The liquid outlets at the bottom of the first liquid storage tank (19) and the second liquid storage tank (20) are connected to the top liquid inlet of the mixing box (18) through the first liquid infusion pipe (21) and the second liquid infusion pipe (22), respectively. The first liquid infusion pipe (21) and the second liquid infusion pipe (22) are respectively connected to a pressure pump (23). One end of the stirring rod (25) rotates through the side wall of the mixing box (18) and is fixedly installed with a first driven pulley (26). A valve second (27) is provided at the connection between the bottom water outlet of the mixing box (18) and the water inlet at the top of the processing box (17).

7. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 6, characterized in that: The invention also comprises a driving motor (28), wherein the driving motor (28) is fixedly mounted on the processing box (17), the output shaft of the driving motor (28) is fixedly mounted with a driving shaft (29), a support plate (30) is fixedly mounted on the top of the processing box (17), and one end of the driving shaft (29) rotates through the support plate (30) and is fixedly mounted with a first driving pulley (31), a second driving pulley (32) is fixedly mounted on the driving shaft (29), the second driving pulley (32) is connected to the first driven pulley (26) through a first belt (33), one end of a spiral feeding rod (34) rotates through the side wall of the processing box (17) and is fixedly mounted with a second driven pulley (35), the first driving pulley (31) is connected to the second driven pulley (35) through a second belt (36).

8. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 6, characterized in that: It also includes a fixing plate (37), wherein the fixing plate (37) is fixedly mounted on the inner walls of both sides of the processing box (17), and the filter screen (38) is embedded in the fixing plate (37), and the two sides of the partition (39) are respectively fixedly connected to the fixing plate (37) and the top of the processing box (17), and the servo motor (40) is fixedly mounted on the top of the processing box (17), and the output shaft of the servo motor (40) is fixedly mounted with a cam (41), and a connecting rod (42) is slidably passed through the partition and is hingedly connected with a connecting rod (43), and one end of the connecting rod (43) is hingedly connected to the cam (41) away from the center, and a scraper (44) is fixedly mounted on one end of the connecting rod (42), and the bottom of the scraper (44) contacts the top of the filter screen (38).

9. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 1, characterized in that: It also includes a concentration performance detection device for detecting the working state of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution, and the concentration performance detection device includes: Mass flow meter, used to detect the mass of water vapor produced by the rotary film evaporator per unit time; A mass sensor, used to detect the mass of the liquid to be concentrated remaining after the rotary film evaporator works for a unit time; Temperature sensor 1, used to detect the temperature of the liquid to be concentrated in the rotary film evaporator; Temperature sensor 2, used to detect the temperature of the remaining liquid to be concentrated after the rotary film evaporator works for a unit time; Temperature sensor three, used to detect the temperature of high-pressure steam when it enters the rotary film evaporator; Temperature sensor 4, used to detect the temperature of high-pressure steam output by the rotary film evaporator after a unit of working time; A controller and an alarm, wherein the controller is electrically connected to a mass flow meter, a mass sensor, a temperature sensor 1, a temperature sensor 2, a temperature sensor 3, a temperature sensor 4 and the alarm, and the controller controls the operation of the alarm based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4.

10. A treatment system for resin regeneration wastewater from a thermal power plant according to claim 9, characterized in that: The controller controls the alarm to work based on the mass flow meter, the mass sensor, the temperature sensor 1, the temperature sensor 2, the temperature sensor 3 and the temperature sensor 4, including the following steps: According to the following formula and the detection values ​​of the mass flow meter, mass sensor, temperature sensor 1, temperature sensor 2, temperature sensor 3 and temperature sensor 4, the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time is calculated, and the controller compares the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time with a preset total heat transfer coefficient range. If the total heat transfer coefficient W of the rotary film evaporator when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution per unit time is not within the preset total heat transfer coefficient range, the controller controls the alarm to sound an alarm; Where W is the total heat transfer coefficient of the rotary film evaporator per unit time when the concentrated liquid is introduced into the rotary film evaporator to form a saturated NaCl solution, C p is the constant pressure specific heat capacity of the liquid to be concentrated, M1 is the detection value of the mass flowmeter on the mass of water vapor generated by the rotary film evaporator working in unit time, M2 is the detection value of the mass sensor on the mass of the liquid to be concentrated remaining after the rotary film evaporator works in unit time, T0 is the saturation temperature of water vapor, t1 is the detection value of the temperature of the liquid to be concentrated delivered to the rotary film evaporator by the first temperature sensor, t2 is the detection value of the temperature of the liquid to be concentrated remaining after the rotary film evaporator works in unit time by the second temperature sensor, R is the latent heat of vaporization of water, A is the total area of ​​evaporation heat transfer in the rotary film evaporator, δ is the unit time, T1 is the detection value of the temperature when the high-pressure steam enters the rotary film evaporator by the third temperature sensor, and T2 is the detection value of the high-pressure steam output temperature of the rotary film evaporator after the working unit time by the temperature sensor.

Images