A reclaimed water treatment system and treatment process

Abstract

The application relates to the technical field of water treatment technology, and discloses a reclaimed water treatment system and a treatment process, which comprises a first sterilization device, a clarification device, a sand filtration device, an ultrafiltration device, a first reverse osmosis device, a second reverse osmosis device, a mixed ion exchanger and an EDI device which are sequentially connected, the first sterilization device is used for physically sterilizing and treating reclaimed water, the clarification device is used for clarifying the reclaimed water, the sand filtration device, the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device are used for filtering and purifying the reclaimed water, the mixed ion exchanger is used for ion exchanging the reclaimed water, and the EDI device is used for deionizing the reclaimed water, and the application has the effect of improving the quality of the reclaimed water.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment technology, and in particular to a reclaimed water treatment system and treatment process. BACKGROUND

[0002] A thermal power plant refers to a power plant that utilizes the steam extracted or discharged from a steam turbine to supply heat to users while generating power. Compared with a thermal power plant, a thermal power plant has a larger boiler due to its dual functions of power generation and heat supply.

[0003] The existing thermal power plant usually uses tap water as raw water, which is treated by the process of "ultrafiltration + primary reverse osmosis + secondary reverse osmosis + EDI" before being supplied to the boiler. The use of tap water as raw water ensures stable operation of the water treatment system, but the cost is relatively high. If the raw water of the thermal power plant is replaced by reclaimed water produced by a sewage treatment plant, the high-grade water resources can be saved, which has great social benefits.

[0004] The thermal power plant requires reliable water quality (meeting the relevant requirements of GB / T12145 "Water and Steam Quality Standard for Thermal Power Generating Units and Steam Power Equipment") and stable water quantity, so the water treatment system has high reliability requirements, and the water treatment system directly affects the safe operation of the boiler.

[0005] The effluent quality of the sewage treatment plant is affected by the unstable influent quality of the sewage treatment plant, resulting in unstable effluent quality of the reclaimed water plant, which cannot meet the requirements of the thermal power plant for water supply. Therefore, a system for treating reclaimed water is needed. SUMMARY

[0006] In order to improve the water quality of reclaimed water, the present application provides a reclaimed water treatment system and treatment process.

[0007] The reclaimed water treatment system and treatment process provided by the present application adopt the following technical solutions:

[0008] A reclaimed water treatment system, comprising a first sterilization device, a clarification device, a sand filtration device, an ultrafiltration device, a first reverse osmosis device, a second reverse osmosis device, a mixed ion exchanger and an EDI device connected in sequence, wherein the first sterilization device is used for physical sterilization treatment of the reclaimed water, the clarification device is used for clarification of the reclaimed water, the sand filtration device, the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device are used for filtration and purification of the reclaimed water, the mixed ion exchanger is used for ion exchange of the reclaimed water, and the EDI device is used for deionization treatment of the reclaimed water.

[0009] By adopting the technical scheme, the microorganism in the reclaimed water is killed by the first sterilization device; the reclaimed water is filtered by the sand filter device to remove large-particle impurities in the reclaimed water; the reclaimed water is separated and purified by the ultrafiltration device to filter out large molecules, suspended matter, colloidal particles and most dissolved substances in the reclaimed water; the tap water is separated and purified by the first and second reverse osmosis devices to remove ions, organic matter, bacteria and other impurities in the tap water; the ion exchange of the reclaimed water is performed by the mixed ion exchanger to stabilize the water quality of the reclaimed water; and the reclaimed water is deeply desalted by the EDI device to prepare pure water from the reclaimed water, so that the water quality of the reclaimed water after treatment meets the water quality requirement of the boiler processing.

[0010] Optionally, the cleaning device is further included, and the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device are connected with the cleaning device; the cleaning device comprises a cleaning main pipe, the cleaning main pipe is connected with an acidic preparation tank for preparing an acidic medicament and an alkaline preparation tank for preparing an alkaline medicament, the acidic preparation tank is connected with an acid liquid storage tank for storing an acidic solvent, and the alkaline preparation tank is connected with an alkali liquid storage tank for storing an alkaline solvent.

[0011] By adopting the technical scheme, the acidic medicament is prepared by the acidic preparation tank, the alkaline medicament is prepared by the alkaline preparation tank, the dirt in the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device is reacted by the acidic medicament / alkaline medicament, and the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device are cleaned.

[0012] Optionally, the water tank for storing the tap water is further included, and the water tank is used for conveying the tap water to the boiler / cleaning device.

[0013] By adopting the technical scheme, since the dissolved solids in the reclaimed water are high and the salt content is high, the electric conductivity of the reclaimed water is low, the reclaimed water treatment system is prone to failure, and the boiler system cannot be normally watered; in order to ensure the normal operation of the boiler system during the maintenance of the reclaimed water treatment system, the water tank is used for watering the boiler system, the production of the boiler makeup water is not affected, and the reliability of the boiler water supply is improved.

[0014] Optionally, the tap water treatment device for treating the tap water is arranged between the water tank and the boiler, the tap water treatment device comprises an ultrafiltration assembly connected with one end of the water tank, the reverse osmosis assembly is arranged on the side of the ultrafiltration assembly away from the water tank, and the reverse osmosis assembly is connected with the EDI device on the side of the reverse osmosis assembly away from the ultrafiltration assembly.

[0015] By adopting the technical scheme, the tap water is separated and purified by the ultrafiltration assembly to filter out large molecules, suspended matter, colloidal particles and most dissolved substances in the tap water; and the tap water is separated and purified by the reverse osmosis assembly to remove ions, organic matter, bacteria and other impurities in the tap water.

[0016] Optionally, the clarifying device comprises a clarifying tank, a stirring mechanism for stirring the reclaimed water is arranged on the clarifying tank, the stirring mechanism comprises a support frame arranged on the clarifying tank, a stirring rod inserted into the clarifying tank and a stirring motor for driving the stirring rod to rotate are rotationally connected to the support frame, and a stirring plate is arranged on the circumferential surface of the stirring rod.

[0017] By adopting the above technical scheme, the stirring motor drives the stirring rod and the stirring plate to rotate, so that the flocculants in the clarifying tank can react more fully with the impurities in the reclaimed water.

[0018] Optionally, a feeding mechanism is arranged on the stirring plate, a receiving groove for storing the flocculants is formed in the upper portion of the stirring plate, a discharging hole for communicating with the receiving groove is formed in the side of the stirring plate away from the rotating direction of the stirring rod, the feeding mechanism comprises a baffle rotationally connected to the side of the stirring plate, the baffle is used for sealing the discharging hole, and a driving assembly for driving the baffle to rotate is arranged on the stirring plate.

[0019] By adopting the above technical scheme, the driving assembly drives the baffle to rotate to open the discharging hole, so that the flocculants in the receiving groove can enter the clarifying tank through the discharging hole; conversely, the driving assembly drives the baffle to seal the discharging hole, so that the flocculants are not easy to leak from the receiving groove.

[0020] Optionally, a fixing groove below the receiving groove is formed in the side of the stirring plate toward the rotating direction of the stirring rod, a plug hole in the shape of a horizontal waist hole is formed in the inner wall of the fixing groove away from the stirring rod, the driving assembly comprises a driving plate arranged in the fixing groove and a spring, one end of the spring abuts against the driving plate, the other end of the spring abuts against the bottom wall of the fixing groove, a driving rod is arranged on one side of the driving plate and passes through the plug hole, a connecting rod is arranged on the driving rod outside the stirring plate, and a fixing lug hinged to the connecting rod is arranged on the side of the baffle toward the driving shaft.

[0021] By adopting the above technical scheme, when the driving plate moves toward the spring, the driving rod moves synchronously, the baffle is pushed by the connecting rod through the driving rod to rotate to open the discharging hole, so that the flocculants in the receiving groove can be added into the reclaimed water; when the driving rod abuts against the inner wall of the plug hole along the axis of the fixing groove, the driving rod is limited to continue to move, that is, the driving plate is limited to continue to move, so that the limiting effect is achieved.

[0022] Optionally, the stirring plate is provided with a fixed hole communicating with the containing groove and located away from the end face of the fixed groove, and the stirring plate is provided with an adjusting mechanism, the adjusting mechanism comprises a support plate arranged on the inner wall of the containing groove and an operating plate slidingly arranged in the fixed hole, a through hole is formed in the upper portion of the support plate, a partition plate is rotatably connected to the containing groove, the partition plate is located below the support plate and is used for sealing the through hole, and the operating plate is used for driving the partition plate to rotate; when the partition plate seals the through hole, the end face of the operating plate faces the partition plate.

[0023] By adopting the above technical scheme, the operating plate is pulled out of the fixed hole, when the operating plate moves to the side where the hinged shaft of the partition plate is close to the fixed hole, the partition plate rotates due to the gravity of the flocculating agent, that is, the through hole is opened, the flocculating agent falls to the bottom wall of the containing groove, and when the baffle is driven to rotate to open the discharging hole, the flocculating agent enters the clarifier.

[0024] Optionally, an installation hole in the shape of a horizontal waist-shaped hole is formed in the end face of the containing groove away from the stirring rod, a linkage mechanism is arranged between the driving plate and the operating plate, the linkage mechanism comprises a support rod arranged on the side of the stirring plate away from the stirring rod, a rotating rod is rotatably connected to the support rod, the end face of the rotating rod facing the stirring plate is provided with a first operating hole located below the support rod and a second operating hole located above the support rod, the first operating hole and the second operating hole are in the shape of a waist hole and extend along the length direction of the rotating rod, the driving rod is arranged in the first operating hole, a driven rod is slidingly arranged in the second operating hole, the driven rod passes through the installation hole and is connected with the operating plate.

[0025] By adopting the above technical scheme, when the driving plate moves towards the spring direction, the driving rod drives the operating rod to rotate around the support rod, the operating rod drives the driven rod to move in the installation hole, that is, the operating plate moves towards the inner wall of the containing groove away from the fixed hole, the operating plate drives the partition plate to rotate, and the partition plate reseals the gap.

[0026] A reclaimed water treatment process, comprising the following steps:

[0027] Step one, sterilization step, the reclaimed water is transported into a first sterilization device for physical sterilization treatment;

[0028] Step two, clarification step, the sterilized reclaimed water is transported into a clarifier for clarification of the reclaimed water;

[0029] Step three, filtration step, the clear liquid in the clarifier is sequentially filtered and purified through a sand filter device, an ultrafiltration device, a first reverse osmosis device and a second reverse osmosis device;

[0030] Step four, mixed ion exchange step, the filtered and purified water is transported to the mixed ion exchanger for ion exchange;

[0031] Step five, EDI processing, the ion exchanged water is transported to the EDI device for pure water preparation.

[0032] By adopting the above technical scheme, the reclaimed water is sequentially subjected to sterilization, clarification, filtration, ion exchange and EDI processing, and the pure water meeting the requirements of the boiler is obtained.

[0033] To sum up, the present application has at least one of the following beneficial technical effects:

[0034] 1. The microorganisms in the reclaimed water are killed by the first sterilization device; the sand filtration device is used to filter the reclaimed water to remove the large particle impurities in the reclaimed water; the ultrafiltration device is used to separate and purify the reclaimed water to filter out the relatively large molecules, suspended solids, colloidal particles and most dissolved substances in the reclaimed water; the first and second reverse osmosis devices are used to separate and purify the tap water to remove the ions, organic matter, bacteria and other impurities in the tap water; the mixed ion exchanger is used to ion exchange the reclaimed water to stabilize the water quality of the reclaimed water; and the EDI device is used to remove salt from the reclaimed water to prepare pure water from the reclaimed water, so that the water quality of the reclaimed water after treatment meets the water quality requirements of the boiler processing;

[0035] 2. The cleaning mechanism is arranged to chemically clean the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device to remove the impurities in the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device, that is, to improve the water quality after the reclaimed water treatment;

[0036] 3. The water tank and the tap water treatment mechanism are arranged, and the boiler can normally operate when the cleaning mechanism cleans the ultrafiltration device, the first reverse osmosis device and the second reverse osmosis device. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 is a structural schematic view of the embodiment of the present application;

[0039] Figure 2 is a structural schematic view highlighting the clarification device;

[0040] Figure 3 is a structural schematic view highlighting the feeding mechanism;

[0041] Figure 4is a sectional view highlighting the adjusting mechanism;

[0042] Figure 5 is a partial exploded view highlighting the linkage mechanism.

[0043] 100, first sterilization device; 101, second sterilization device; 200, clarification device; 201, clarification tank; 202, stirring mechanism; 203, feeding mechanism; 204, water storage tank; 205, support frame; 206, stirring rod; 207, stirring plate; 208, stirring motor; 209, accommodating groove; 210, discharge hole; 211, baffle; 212, support lug; 213, driving assembly; 214, fixing groove; 215, driving plate; 216, spring; 217, driving rod; 218, connecting rod; 219, fixing lug; 220, fixing plate; 221, insertion hole; 222, adjusting mechanism; 223, support plate; 224, partition plate; 225, operation plate; 226, through hole; 227, fixing hole; 228, linkage mechanism; 229, support rod; 230, rotating rod; 231, driven rod; 232, mounting hole; 233, first operation hole; 234, second operation hole; 300, sand filtration device; 301, ultrafiltration device; 400, first reverse osmosis device; 401, second reverse osmosis device; 500, mixed ion exchanger; 600, EDI device; 700, water tank; 800, tap water treatment device; 801, ultrafiltration assembly; 802, reverse osmosis assembly; 900, cleaning device; 901, acidic preparation tank; 902, alkaline preparation tank; 903, acid storage tank; 904, alkali storage tank. DETAILED DESCRIPTION

[0044] The following will be described in detail below with reference to the accompanying drawings. Figures 1-5 The present application is further described in detail.

[0045] The present embodiment discloses a reclaimed water treatment system and process. Referring to Figure 1 A reclaimed water treatment system comprises a first sterilization device 100, a second sterilization device 101, a clarification device 200, a sand filtration device 300, an ultrafiltration device 301, a first reverse osmosis device 400, a second reverse osmosis device 401, a mixed ion exchanger 500, an EDI device 600, a water tank 700, a tap water treatment device 800, and a cleaning device 900.

[0046] Referring to Figure 1 The first sterilization device 100 adopts a pipeline type ultraviolet sterilizer. The pipeline type ultraviolet sterilizer can sterilize the reclaimed water when the reclaimed water passes through. The second sterilization device 101 adopts a chlorination disinfection device. One side of the chlorination disinfection device is connected with the pipeline type ultraviolet sterilizer, so that the reclaimed water can flow from the first sterilization device 100 to the second sterilization device 101, and the microorganisms in the reclaimed water are killed by the chlorination agent.

[0047] Referring to Figure 2 and Figure 3 , the clarifying device 200 is used for clarifying the reclaimed water. The clarifying device 200 comprises a clarifying tank 201, a stirring mechanism 202 and a feeding mechanism 203. The chlorination disinfection device is communicated with the clarifying tank 201, so that the reclaimed water can flow from the chlorination disinfection device to the clarifying tank 201.

[0048] Referring to Figure 2 , the upper end surface of the clarifying tank 201 is provided with a water storage groove 204, and the water storage groove 204 stores the reclaimed water after sterilization. The stirring mechanism 202 is used for stirring the reclaimed water, and the stirring mechanism 202 comprises a support frame 205, a stirring rod 206, a stirring plate 207 and a stirring motor 208.

[0049] Referring to Figure 2 , the support frame 205 is fixedly connected to the ground, the stirring rod 206 is rotatably connected to the support frame 205, and one end of the stirring rod 206 is inserted into the water storage groove 204. The stirring motor 208 is fixedly connected to the upper end surface of the support frame 205, and the output shaft of the stirring motor 208 is fixedly connected with the stirring rod 206.

[0050] Referring to Figure 2 , the stirring plate 207 is provided with two, and the two stirring plates 207 are fixedly connected to the circumferential surface of the stirring rod 206. The two stirring plates 207 are distributed in a circumferential array along the axis of the stirring rod 206. In other embodiments, the stirring plate 207 can also be provided with three, four or other quantities.

[0051] Referring to Figure 2 and Figure 3 , the stirring plate 207 is provided with the feeding mechanism 203, and the feeding mechanism 203 is used for adding flocculating agent into the water storage groove 204. The upper end surface of the stirring plate 207 is provided with a containing groove 209, and the containing groove 209 is used for storing the flocculating agent. The end surface of the stirring plate 207, which is away from the movement direction of the stirring rod 206, is provided with a discharging hole 210, and the discharging hole 210 is communicated with the containing groove 209. The bottom wall height of the containing groove 209 gradually increases away from the discharging hole 210.

[0052] Referring to Figure 2 and Figure 3 , the feeding mechanism 203 comprises a baffle 211, a support lug 212 and a driving assembly 213, the support lug 212 is fixedly connected to the end surface of the stirring plate 207 provided with the discharging hole 210, and the support lug 212 is located above the discharging hole 210. The baffle 211 is hinged with the support lug 212. When the baffle 211 is only subjected to its own gravity, the baffle 211 seals the discharging hole 210, preventing the flocculating agent from discharging.

[0053] Referring to Figure 4 and Figure 5The driving assembly 213 is used for driving the baffle 211 to rotate. The stirring plate 207 is provided with a fixing groove 214 on the end face away from the discharge hole 210. The fixing groove 214 is located below the containing groove 209 and below the water surface of the intermediate water. The driving assembly 213 comprises a driving plate 215, a spring 216, a driving rod 217, a connecting rod 218 and a fixing lug 219. The driving plate 215 and the spring 216 are arranged in the fixing groove 214. One end of the spring 216 is fixedly connected with the bottom wall of the fixing groove 214, and the other end of the spring 216 is fixedly connected with the driving plate 215. The end of the driving plate 215 away from the spring 216 extends out of the fixing groove 214, and the end face of the driving plate 215 away from the spring 216 is fixedly connected with a fixing plate 220. When the stirring plate 207 moves to drive the flow of the intermediate water, the contact area with the intermediate water is increased through the fixing plate 220, the reaction force of the intermediate water on the driving plate 215 is increased, the driving plate 215 is more easily moved towards the spring 216, and the spring 216 is compressed and deformed.

[0054] With reference to Figure 4 and Figure 5 , the stirring plate 207 is provided with a jack 221 on the end face away from the stirring plate 207. The jack 221 is in the shape of a horizontal waist hole. The driving rod 217 is slidingly arranged in the jack 221. One end of the driving rod 217 is fixedly connected with the end face of the driving plate 215 away from the stirring rod 206, and the other end of the driving rod 217 extends out of the stirring plate 207.

[0055] With reference to Figure 4 and Figure 5 , the fixing lug 219 is fixedly connected with the end face of the baffle 211 facing the driving rod 217. The connecting rod 218 is hingedly connected with the fixing lug 219. The connecting rod 218 is provided with a round hole, and the driving rod 217 is arranged in the round hole.

[0056] With reference to Figure 4 and Figure 5 , the stirring plate 207 is provided with an adjusting mechanism 222. The adjusting mechanism 222 comprises a supporting plate 223, a partition plate 224 and an operating plate 225. The supporting plate 223 is fixedly connected with the inner wall of the containing groove 209 and is located above the discharge hole 210. The supporting plate 223 separates the containing groove 209. The supporting plate 223 is provided with a through hole 226 above.

[0057] With reference to Figure 4 and Figure 5 , the partition plate 224 is rotatably connected with the inner wall of the containing groove 209 and is located below the supporting plate 223. When the operating plate 225 is in a horizontal state, the partition plate 224 seals the opening below the through hole 226, so that the flocculating agent above the partition plate 224 cannot reach below the supporting plate 223.

[0058] With reference to Figure 4And Figure 5 The end face of the stirring plate 207 away from the fixed groove 214 is provided with a fixed hole 227 in communication with the accommodating groove 209, and the fixed hole 227 is located above the discharging hole 210. The operation plate 225 is slidingly arranged in the fixed hole 227, and when the upper end face of the operation plate 225 is attached to the operation plate 225, the operation plate 225 is in a horizontal state.

[0059] Referring to Figure 4 And Figure 5 When the operation plate 225 moves to the side of the partition plate 224 close to the discharging hole 210, the weight of the partition plate 224 and the flocculating agent causes the partition plate 224 to rotate, opening the through hole 226, so that the flocculating agent above the partition plate 224 falls below the support plate 223 through the through hole 226.

[0060] Referring to Figure 4 And Figure 5 A linkage mechanism 228 is arranged between the driving plate 215 and the operation plate 225. The linkage mechanism 228 includes a support rod 229, a rotating rod 230 and a driven rod 231. The end face of the accommodating groove 209 away from the stirring rod 206 is provided with a mounting hole 232 in the shape of a horizontal waist hole. The driven rod 231 is slidingly arranged in the mounting hole 232, and one end of the driven rod 231 is fixedly connected to the operation plate 225.

[0061] Referring to Figure 4 And Figure 5 The support rod 229 is fixedly connected to the end face of the stirring plate 207 away from the stirring rod 206, and the support rod 229 is located between the mounting hole 232 and the insertion hole 221. The rotating rod 230 is sleeved outside the support rod 229, and the rotating rod 230 is located on the side of the connecting rod 218 away from the stirring plate 207. The end face of the rotating rod 230 facing the stirring plate 207 is provided with a first operation hole 233 and a second operation hole 234, both of which are in the shape of a waist hole, and both of which extend along the length direction of the rotating rod 230.

[0062] Referring to Figure 4 And Figure 5 The first operation hole 233 is located below the support rod 229, and the driving rod 217 is inserted into the first operation hole 233 away from the driving plate 215. The second operation hole 234 is located above the support plate 223, and the driven rod 231 is inserted into the second operation hole 234 away from the operation plate 225.

[0063] Referring to Figure 4 And Figure 5When the rotating rod 230 rotates, the driving rod 217 and the driven rod 231 move towards / away from each other. When the driving plate 215 does not move towards the spring 216, the baffle plate 211 seals the discharge hole 210, and the partition plate 224 does not seal the through hole 226, so that the flocculating agent above the supporting plate 223 can fall below the supporting plate 223.

[0064] Referring to Figure 4 and Figure 5 When the stirring motor 208 drives the stirring rod 206 and the stirring plate 207 to rotate, the water resistance is applied to the fixed plate 220, so that the driving plate 215 and the driving rod 217 move towards the spring 216, and the spring 216 is compressed and deformed. The driving rod 217 drives the operating plate 225 to move through the rotating rod 230, drives the partition plate 224 to rotate through the operating plate 225, and re-seals the through hole 226, so that the flocculating agent no longer passes through the through hole 226. In addition, the driving rod 217 drives the baffle plate 211 to rotate through the connecting rod 218 to open the discharge hole 210, so that the flocculating agent falls into the clarifier 201 through the discharge hole 210, thereby controlling the amount of flocculating agent added to the clarifier 201 each time.

[0065] Referring to Figure 4 and Figure 5 When the stirring motor 208 stops running, the spring 216 drives the driving plate 215 and the driving rod 217 to reset. The driving rod 217 drives the baffle plate 211 to rotate in the opposite direction through the connecting rod 218, so that the baffle plate 211 re-seals the discharge hole 210. In addition, the driving rod 217 drives the operating plate 225 to move in the opposite direction through the rotating rod 230, and the operating plate 225 drives the partition plate 224 to rotate in the opposite direction, so that the partition plate 224 no longer seals the through hole 226, and the flocculating agent moves from above the supporting plate 223 to below the supporting plate 223, thereby preparing for the next addition of flocculating agent by the feeding mechanism 203.

[0066] Referring to Figure 4 The sand filter device 300 is used to remove suspended solids, particles, silt and other solid impurities in the reclaimed water. The sand filter device 300 comprises a storage box connected with the clarifier 201, so that the reclaimed water can flow from the clarifier 201 to the storage box. The storage box is paved with a filter material layer, and the particle size of the filter material is arranged in layers from fine to coarse along the direction from the water inlet to the water outlet, so as to filter different particle sizes of impurities.

[0067] Referring to Figure 5 The ultrafiltration device 301 is used to filter out large molecules, suspended solids, colloidal particles and most dissolved substances in the reclaimed water. The storage box is connected with the ultrafiltration device 301, so that the reclaimed water flows from the storage box to the ultrafiltration device 301.

[0068] Referring to Figure 1The first reverse osmosis device 400 and the second reverse osmosis device 401 are used for removing the particulate matters such as suspended solids, bacteria and viruses in the reclaimed water. One end of the first reverse osmosis device 400 is connected with the ultrafiltration device 301, and the other end of the first reverse osmosis device 400 is connected with the second reverse osmosis device 401, so that the reclaimed water sequentially passes through the first reverse osmosis device 400 and the second reverse osmosis device 401.

[0069] With reference to Figure 1 The mixed ion exchanger 500 is used for ion exchange of the reclaimed water, so as to stabilize the water quality of the reclaimed water. The mixed ion exchanger 500 is connected with the second reverse osmosis device 401, so that the reclaimed water flows from the second reverse osmosis device 401 to the mixed ion exchanger 500. The EDI device 600 is used for deep desalination of the reclaimed water, so as to prepare the reclaimed water into pure water. One end of the EDI device 600 is connected with the mixed ion exchanger 500, and the other end of the EDI device 600 is connected with the boiler, so that the reclaimed water enters the boiler after passing through the EDI device 600.

[0070] With reference to Figure 1 The water tank 700 is used for storing tap water, and the water tank 700 is used for conveying the tap water to the boiler. The water tank 700 is provided with the tap water treatment device 800 between the water tank 700 and the boiler, and the tap water treatment device 800 is used for treating the tap water. The tap water treatment device 800 comprises an ultrafiltration assembly 801 and a reverse osmosis assembly 802.

[0071] With reference to Figure 1 The ultrafiltration assembly 801 is used for filtering the macromolecular matters such as suspended matters, colloids, proteins and microorganisms in the tap water. One end of the ultrafiltration assembly 801 is communicated with the water tank 700, and the other end of the ultrafiltration assembly 801 is connected with the reverse osmosis assembly 802.

[0072] With reference to Figure 1 One end of the reverse osmosis assembly 802 is connected with the EDI device. The reverse osmosis assembly 802 is used for effectively removing the pollutants in the water and providing high-quality water.

[0073] With reference to Figure 1 The cleaning device 900 is used for cleaning the ultrafiltration device 301, the first reverse osmosis device 400 and the second reverse osmosis device 401. The cleaning device 900 comprises a cleaning main pipe, an alkaline preparation tank 902, an alkaline solution storage tank 904, an acid preparation tank 901 and an acid solution storage tank 903.

[0074] With reference to Figure 1 The acid solution storage tank 903 is used for storing the acid solvent. One end of the acid preparation tank 901 is connected with the acid solution storage tank 903, and the other end of the acid preparation tank 901 is connected with the water tank 700. The acid agent is prepared by the acid solvent and the tap water.

[0075] With reference to Figure 1The alkali storage tank 904 is used for storing the alkali solvent. One end of the alkali preparation tank 902 is connected with the alkali storage tank 904, and the other end of the alkali preparation tank 902 is connected with the water tank 700. The acidic medicament is prepared by the alkali solvent and tap water.

[0076] With reference to Figure 1 Figure 1 Figure 1 The alkali preparation tank 902, the acidic preparation tank 901 and the water tank 700 are all communicated with the cleaning main pipe, and a plurality of cleaning branch pipes are connected with the cleaning main pipe. The ultrafiltration device 301, the first reverse osmosis device 400 and the second reverse osmosis device 401 are connected with the cleaning main pipe through the cleaning branch pipes. Thus, the ultrafiltration device 301, the first reverse osmosis device 400 and the second reverse osmosis device 401 can be cleaned, and the impurities in the ultrafiltration device 301, the first reverse osmosis device 400 and the second reverse osmosis device 401 can be cleaned.

[0077] A water treatment process, comprising the following steps:

[0078] Step one, sterilization step, the water is transported to the first sterilization device 100 for physical sterilization treatment;

[0079] Step two, clarification step, the sterilized water is transported to the clarification tank 201 for clarification of the water;

[0080] Step three, filtration step, the clear liquid in the clarification tank 201 is sequentially filtered and purified through the sand filtration device 300, the ultrafiltration device 301, the first reverse osmosis device 400 and the second reverse osmosis device 401;

[0081] Step four, mixed ion exchange step, the filtered and purified water is transported to the mixed ion exchanger 500 for ion exchange;

[0082] Step five, EDI treatment, the ion exchanged water is transported to the EDI device 600 for pure water preparation.

[0083] Further, in step one, the water is transported to the second sterilization device 101 for chemical sterilization treatment, so that the bacteria and mycelium that cannot be eliminated by the first sterilization device 100 are eliminated, the influence of the bacteria and mycelium on the subsequent treatment process is prevented, and the water treatment system can deliver reliable water for the boiler.

[0084] The implementation principle of the water treatment system and the treatment process in the embodiment of the application is that the water is sequentially subjected to sterilization, clarification, filtration, ion exchange and EDI treatment, and finally stable and reliable water quality is obtained, so that sufficient raw water is provided for the thermal power plant.

[0085] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the terms "first", "second" or "third" and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. The terms "one", "another", "an" or "some" as well as similar referents in the context of describing the application are to be understood to be equivalent. The terms "including" and / or "containing" shall be considered as disclosing the presence of stated elements or integers or groups of elements / integers but not precluding the presence of one or more other elements or integers or groups of elements / integers. The terms "above" and "below" as well as "upper" and "lower" or "right" and "left" are used only for ease of description and do not indicate that a described position is relative to a position of use or working of the application, and thus they are intended to be interchangeable under the circumstances.

[0086] The preferred embodiments of the present application are described above, and the above description is merely illustrative of the present application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A reclaimed water treatment system, characterized by: The application relates to a water treatment device, which comprises a first sterilization device (100), a clarifying device (200), a sand filtering device (300), an ultrafiltration device (301), a first reverse osmosis device (400), a second reverse osmosis device (401), a mixed ion exchanger (500) and an EDI device (600) connected in sequence, wherein the first sterilization device (100) is used for physical sterilization treatment of reclaimed water, the clarifying device (200) is used for clarifying the reclaimed water, the sand filtering device (300), the ultrafiltration device (301), the first reverse osmosis device (400) and the second reverse osmosis device (401) are used for filtering and purifying the reclaimed water, the mixed ion exchanger (500) is used for ion exchange of the reclaimed water, and the EDI device (600) is used for deionization treatment of the reclaimed water. The clarifying device (200) comprises a clarifying tank (201), wherein a stirring mechanism (202) for stirring the reclaimed water is arranged on the clarifying tank (201), the stirring mechanism (202) comprises a support frame (205) arranged on the clarifying tank (201), a stirring rod (206) inserted into the clarifying tank (201) and a stirring motor (208) for driving the stirring rod (206) to rotate are rotationally connected to the support frame (205), and a stirring plate (207) is arranged on the circumferential surface of the stirring rod (206). The stirring plate (207) is provided with a feeding mechanism (203), a containing groove (209) for storing a flocculating agent is formed above the stirring plate (207), a discharging hole (210) communicating with the containing groove (209) is formed on the side of the stirring plate (207) away from the rotating direction of the stirring rod (206), the feeding mechanism (203) comprises a baffle (211) rotationally connected to one side of the stirring plate (207), the baffle (211) is used for sealing the discharging hole (210), and a driving assembly (213) for driving the baffle (211) to rotate is arranged on the stirring plate (207). The stirring plate (207) is provided with a fixing groove (214) below the containing groove (209) on the side towards the rotating direction of the stirring rod (206), a jack (221) in the shape of a horizontal waist hole is formed in the inner wall of the fixing groove (214) away from the stirring rod (206), the driving assembly (213) comprises a driving plate (215) and a spring (216) arranged in the fixing groove (214), one end of the spring (216) abuts against the driving plate (215), the other end of the spring (216) abuts against the bottom wall of the fixing groove (214), a driving rod (217) passing through the jack (221) is arranged on one side of the driving plate (215), a connecting rod (218) is sleeved on the driving rod (217) outside the stirring plate (207), and a fixing lug (219) hinged to the connecting rod (218) is arranged on the side of the baffle (211) towards the driving shaft.

2. The system of claim 1, wherein: The cleaning device (900) is connected with the ultrafiltration device (301), the first reverse osmosis device (400) and the second reverse osmosis device (401); the cleaning device (900) comprises a cleaning main pipe, an acidic preparation tank (901) for preparing an acidic medicament and an alkaline preparation tank (902) for preparing an alkaline medicament, the acidic preparation tank (901) is connected with an acid liquid storage tank (903) for storing an acidic solvent, and the alkaline preparation tank (902) is connected with an alkali liquid storage tank (904) for storing an alkaline solvent.

3. The system of claim 2, wherein: The water tank (700) is used for conveying tap water to the boiler / cleaning device (900).

4. The system of claim 3, wherein: The water tank (700) is provided with a tap water treatment device (800) for treating tap water, the tap water treatment device (800) comprises an ultrafiltration assembly (801) connected with one end of the water tank (700), the ultrafiltration assembly (801) is provided with a reverse osmosis assembly (802) away from the water tank (700), and the reverse osmosis assembly (802) is connected with the EDI device (600) away from the ultrafiltration assembly (801).

5. The system of claim 1, wherein: The stirring plate (207) is provided with a fixed hole (227) communicating with the containing groove (209) at an end surface away from the fixed groove (214), and the stirring plate (207) is provided with an adjusting mechanism (222), the adjusting mechanism (222) comprises a support plate (223) arranged on an inner wall of the containing groove (209) and an operation plate (225) slidingly arranged in the fixed hole (227), a through hole (226) is formed in the support plate (223), a partition plate (224) is rotationally connected in the containing groove (209), the partition plate (224) is located below the support plate (223) and is used for sealing the through hole (226), and the operation plate (225) is used for driving the partition plate (224) to rotate; when the partition plate (224) seals the through hole (226), an end surface of the operation plate (225) faces the support plate (223) and abuts against the partition plate (224).

6. The system of claim 5, wherein: The accommodating groove (209) is provided with a horizontal waist-shaped mounting hole (232) away from the end surface of the stirring rod (206), a linkage mechanism (228) is arranged between the driving plate (215) and the operating plate (225), the linkage mechanism (228) comprises a supporting rod (229) arranged on the stirring plate (207) away from the stirring rod (206), the supporting rod (229) is rotatably connected with a rotating rod (230), the rotating rod (230) is provided with a first operating hole (233) below the supporting rod (229) and a second operating hole (234) above the supporting rod (229) towards the end surface of the stirring plate (207), the first operating hole (233) and the second operating hole (234) are both waist-shaped and extend along the length direction of the rotating rod (230), the driving rod (217) is arranged in the first operating hole (233), the second operating hole (234) is slidably provided with a driven rod (231), the driven rod (231) passes through the mounting hole (232) and is connected with the operating plate (225).

7. A water treatment process using the water treatment system of any one of claims 1-6, comprising the following steps: Step one, sterilization step, the water is transported into the first sterilization device (100) for physical sterilization treatment; Step two, clarification step, the sterilized water is transported into the clarification tank (201) for clarification of the water; Step three, filtration step, the clarified liquid in the clarification tank (201) is sequentially filtered and purified by the sand filter device (300), the ultrafiltration device (301), the first reverse osmosis device (400) and the second reverse osmosis device (401); Step four, mixed ion exchange step, the filtered and purified water is transported into the mixed ion exchanger (500) for ion exchange; Step five, EDI treatment, the ion exchanged water is transported into the EDI device (600) for pure water production.

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