CN110668543B - Recovery system and treatment process of ion exchange regeneration wastewater - Google Patents
Recovery system and treatment process of ion exchange regeneration wastewater Download PDFInfo
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- CN110668543B CN110668543B CN201911019193.4A CN201911019193A CN110668543B CN 110668543 B CN110668543 B CN 110668543B CN 201911019193 A CN201911019193 A CN 201911019193A CN 110668543 B CN110668543 B CN 110668543B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/60—Cleaning or rinsing ion-exchange beds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/05—Conductivity or salinity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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Abstract
The invention relates to a recovery system and a treatment process of ion exchange regeneration wastewater, which relate to the technical field of industrial wastewater reuse and comprise an anion exchanger and a cation exchanger, wherein the anion exchanger is provided with a first recovery main pipe which is connected with a first forward washing recovery pipe and a first middle discharge recovery pipe; the cation exchanger is provided with a second recovery main pipe, and the second recovery main pipe is connected with a second forward washing recovery pipe and a second middle discharge recovery pipe; the first middle discharge recovery pipe and the second middle discharge recovery pipe are connected with a neutralization pond, the neutralization pond is provided with a middle discharge blow-off pipe, and the first forward washing recovery pipe and the second forward washing recovery pipe are connected with a circulating pond. According to the invention, the first forward washing recovery pipe and the second forward washing recovery pipe are introduced into the circulating tank for neutralization and are used as circulating cooling water of a power plant for utilization, so that the part of wastewater is well utilized, the utilization rate of resources is improved, the consumption of resources is reduced, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of industrial wastewater recycling, in particular to a recovery system and a treatment process of ion exchange regeneration wastewater.
Background
The water supply guarantee department for boiler water supply production water between the chemical water plants of the thermal power plant, especially the boiler demineralized water makes up the water yield greatly, to adopting anion and cation exchange to prepare the process of demineralized water production, it is big to the regeneration treatment process consumables desalination water yield after the bed body became invalid, and the acid-base waste water that produces can only neutralize the sodium tube and discharge, waste the water resource and cause the cost of acid-base waste water neutralization treatment again promptly, according to the power plant recirculated cooling water quality standard requirement, the regeneration waste water can be reused as long as meet the requirement.
The disadvantages of the existing systems are: the regenerated wastewater of the anion-cation exchanger completely enters a neutralization tank for neutralization treatment and is discharged to a sewage treatment center for treatment, so that the wastewater resources which should be utilized are wasted, and the overall cost of wastewater treatment is high.
Disclosure of Invention
The invention aims to provide a system for recovering ion exchange regeneration wastewater, which uses wastewater meeting the standard as circulating cooling water of a power plant, improves the utilization rate of resources, reduces the consumption of the resources and saves the cost.
The above object of the present invention is achieved by the following technical solutions:
a recovery system of ion exchange regeneration wastewater comprises an anion exchanger and a cation exchanger, wherein the anion exchanger is provided with a first recovery main pipe, the first recovery main pipe is connected with a first forward washing recovery pipe and a first middle discharge recovery pipe, the first forward washing recovery pipe is provided with a first forward washing recovery valve, and the first middle discharge recovery pipe is provided with a first middle discharge recovery valve;
the cation exchanger is provided with a second recovery main pipe, the second recovery main pipe is connected with a second forward washing recovery pipe and a second middle discharge recovery pipe, the second forward washing recovery pipe is provided with a second forward washing recovery valve, and the second middle discharge recovery pipe is provided with a second middle discharge recovery valve;
the first middle discharge recovery pipe and the second middle discharge recovery pipe are connected with a neutralization pond, the neutralization pond is provided with a middle discharge blow-off pipe, and a middle discharge blow-off valve is arranged on the middle discharge blow-off pipe; the first forward washing recovery pipe and the second forward washing recovery pipe are connected with a circulation tank.
By adopting the technical scheme, when the anion exchanger and the cation exchanger are just washed, the salt content in the wastewater is higher, the first forward washing recovery valve and the second forward washing recovery valve are closed, the first intermediate discharge recovery valve and the second intermediate discharge recovery valve are opened, the part of wastewater with higher content is conveyed to a neutralization tank for neutralization through the first intermediate discharge recovery pipe and the second intermediate discharge recovery pipe, then the intermediate discharge blowoff valve is opened, and the wastewater is discharged to a sewage treatment center through the intermediate discharge blowoff pipe; when the circulating cooling water of the power plant is washed to the back, the salt content in the waste water is greatly reduced, when the water quality standard requirement of the circulating cooling water of the power plant is met, namely the salt content is reduced to a certain value, the first forward washing recovery valve and the second forward washing recovery valve are opened, the first intermediate discharge recovery valve and the second intermediate discharge recovery valve are closed, the first forward washing recovery pipe and the second forward washing recovery pipe are led into the circulating pool for neutralization, and the circulating cooling water of the power plant is utilized, so that the waste water is better utilized, the utilization rate of resources is improved, the consumption of the resources is reduced, and the cost is saved.
Preferably, the first recovery main pipe is provided with a first conductivity online detection piece electrically connected with the first forward washing recovery valve and the first middle discharge recovery valve, and the second recovery main pipe is provided with a second conductivity online detection piece electrically connected with the second forward washing recovery valve and the second middle discharge recovery valve.
By adopting the technical scheme, the first conductivity online detection piece and the second conductivity online detection piece measure the conductivity of the discharged wastewater so as to judge the salt content in the wastewater and control the opening and closing of the first forward washing recovery valve, the first middle discharge recovery valve, the second forward washing recovery valve and the second middle discharge recovery valve. When the detected conductivity is higher than a set value, opening the first middle discharge recovery valve and the second middle discharge recovery valve, closing the first forward washing recovery valve and the second forward washing recovery valve, and discharging the wastewater to a neutralization tank for neutralization treatment; when the detected conductivity is lower than a set value, the first forward washing recovery valve and the second forward washing recovery valve are opened, the first middle discharge recovery valve and the second middle discharge recovery valve are closed, the wastewater is discharged into the circulating pool for neutralization treatment, and the water discharged into the circulating pool can be used as cooling water of a power plant.
Preferably, the circulating tank is provided with an acid adding box and an alkali adding box, and the circulating tank is provided with a pH detection piece electrically connected with the acid adding box and the alkali adding box.
By adopting the technical scheme, the waste water from the anion exchanger and the cation exchanger can not be neutral after being mixed in the neutralization tank and the circulating tank, and generally needs to be adjusted. Detect through pH detection piece, adjust the waste water in circulation pond to neutral, make the water in circulation pond can satisfy the cooling water requirement of power plant.
Preferably, the circulation tank is provided with a T-shaped three-way pipe, the first and second forward washing recovery pipes are respectively connected with two branch pipes of the three-way pipe which are positioned on the same straight line, and the third branch pipe of the three-way pipe is communicated with the upper part of the circulation tank.
By adopting the technical scheme, the acidic wastewater and the alkaline wastewater are generally discharged into the circulating tank to be mixed, but the acidic wastewater and the alkaline wastewater are dispersed to enter the circulating tank, so that the speed is low in the process of mutual neutralization, and the discharge speed of the wastewater after subsequent circulation is low. The acid wastewater and the alkaline wastewater introduced into the circulating tank are mixed and neutralized in the three-way pipe in advance, so that the time required by subsequent neutralization is shortened, the wastewater treatment speed is increased, the efficiency of conveying the wastewater to be used as cooling water is improved, and the energy consumption of the whole treatment system can be saved.
Preferably, the three-way pipe is located the one end that is close to each other of two pipelines on the same straight line and all is provided with the flow distribution plate, two the flow distribution plate is relative setting, and just two all seted up the through-hole on the flow distribution plate, and two on the flow distribution plate the through-hole is the setting of staggering.
Through adopting above-mentioned technical scheme, the flow distribution plate disperses the rivers of gathering a bundle into more trickle, and the through-hole of staggering the setting makes two strands of waste water can alternate the mixture to further improve the speed of two strands of waste water neutralization reaction, reduce the probability that has not reacted completely after flowing from the three-way pipe.
Preferably, a flow detection piece and a hollow neutralizing disc are sequentially arranged on the third branch pipe of the three-way pipe from one end close to the pipe orifice of the third branch pipe to one end far away from the opening of the third branch pipe, the pH detection piece is arranged on the three-way pipe positioned on the flow detection piece and the neutralizing disc, the neutralizing disc comprises a hollow ball and a plurality of liquid outlet pipes which are arranged on the outer wall of the hollow ball in a launching manner and are positioned on the same horizontal plane, the liquid outlet pipes are connected with the inner wall of the third branch pipe of the three-way pipe, and liquid outlet holes are formed in the liquid outlet pipes;
the acid adding box and the alkali adding box are both provided with adding pipes which penetrate through the pipe wall of the three-way pipe and are connected with the liquid outlet pipe, the adding pipes are both connected with water pumps, and the adding pipes are provided with regulating valves which are electrically connected with the pH detecting piece and the flow detecting piece.
Through adopting above-mentioned technical scheme, the pH detects the pH value that the piece detected two strands of waste water mixes, again according to the flow of the waste water that the flow detection piece detected, the size of control governing valve for the solution that comes out from adding sour case or adding the alkali case can basically neutralize with the waste water of mixing, reduces the probability that adjusts again after the later stage entering circulation pond, further shortens the time. And the solution from the acid adding box or the alkali adding box flows out from a plurality of liquid outlet pipes and is dispersed into the three-way pipe, so that the mixing speed is increased, the neutralization speed is increased, and the probability of incomplete reaction after flowing out from the three-way pipe is reduced.
Preferably, the circulating tank is provided with a transition tank, the acid adding tank and the alkali adding tank are arranged on the circulating tank, the transition tank is divided into two parts by a partition plate, and the bottom of the transition tank of each part is provided with a water falling liner; the three-way pipe cleaning device is characterized in that a fixing frame is arranged on the transition box, an outlet end of a third branch pipe of the three-way pipe is connected with an alternate pipe in an L shape in a rotating and sealing mode, a driving assembly for driving the alternate pipe to rotate is arranged on the fixing frame, a water level sensor electrically connected with the driving assembly is arranged in the transition box, the adjusting valve, the flow detection piece, the first forward washing recovery valve and the second forward washing recovery valve are electrically connected, and the waste water amount falling into the transition box in unit time of the three-way pipe is the same as the waste water discharge amount in unit time of the transition box.
By adopting the technical scheme, the fact that the acid liquor or the alkali liquor possibly does not completely react in the tee pipe after being added is considered, and the acid liquor or the alkali liquor can be dispersed after entering the circulating pool, so that the reaction time is prolonged. Therefore, the transition box is arranged, the wastewater of the three-way pipe firstly enters one part of the transition box to fully react after falling, and when the wastewater is full of the critical point of the water-falling liner, the water-falling liner is opened to discharge the wastewater into the circulating pool; and when the water level reaches the point, the water level sensor can send an electric signal to the driving assembly, the driving assembly drives the alternate pipe to rotate, the outlet of the alternate pipe is transferred to the other part of the transition box, and the wastewater is discharged into the other part for full reaction. The pH value of the wastewater entering the circulating tank basically does not need to be adjusted by alternately neutralizing the wastewater in the transition tank, so that the utilization efficiency of the cooling water is further improved. The volume of waste water from transition case exhaust in unit time is certain, after the governing valve has been adjusted according to circulation and pH, governing valve, first just wash the recovery valve, the second just wash the recovery valve and adjust in step again, the adjustment of governing valve has the delay, the delay time is judged according to the length of pipeline and the velocity of flow that detects to satisfy the waste water volume that falls into the transition case in the unit time of three-way pipe and the same condition of transition case waste water discharge volume in the unit time, make the pipe in turn in-process, the progress of two parts of transition case is just opposite.
Preferably, the driving assembly comprises a motor installed on the fixed frame and electrically connected with the water level sensor, a threaded gear installed on an output shaft of the motor, and a gear ring arranged on the outer wall of the alternate pipe and meshed with the threaded gear.
By adopting the technical scheme, when the motor receives an electric signal of the water level sensor, the motor is started, the motor drives the threaded gear to rotate, and the threaded gear drives the gear ring to rotate, so that the rotation of the alternate pipe is realized.
The second purpose of the invention is to provide a process for treating ion exchange regeneration wastewater.
The above object of the present invention is achieved by the following technical solutions:
a process for treating ion exchange regeneration wastewater using a system for recovering ion exchange regeneration wastewater as described in the first object, comprising the steps of:
SP 1: firstly, discharging the waste water of the pressed layers in the anion exchanger and the cation exchanger to a circulating pool through a drain pipe;
SP 2: introducing clear water into the anion exchanger and the cation exchanger through a water injection pipe, cleaning the resin, mixing the waste water cleaned by the anion exchanger and the cation exchanger, and discharging the mixed waste water to a neutralization pond;
SP 3: regeneration, when the numerical values detected by the first conductivity online detection part and the second conductivity online detection part are reduced to a set value, clear water is continuously added at the moment, acid/alkaline solution is correspondingly introduced through a regeneration pipe for replacement regeneration, and wastewater is also mixed and discharged to a neutralization tank;
SP 4: when the values detected by the first conductivity online detecting element and the second conductivity online detecting element are lowered to a set value lower than the set value in SP3, the supply of the acid/alkali solution is stopped, and the water is further cleaned for half an hour, and the wastewater cleaned by the anion exchanger and the cation exchanger is discharged to the circulation tank.
By adopting the technical scheme, in SP1, the waste water in the pressed layer is cleaner and has lower salt content, so that the waste water can be directly discharged into a circulating pool for recycling; in SP2, because the acid-base concentration existing in the anion exchanger and the cation exchanger is high at the beginning, if the acid-base addition is directly carried out, a large amount of acid-base is consumed, and the acid-base is washed by clean water firstly and then neutralized in the anion exchanger and the cation exchanger, so that the consumption of acid-base can be reduced, and the cost is saved; in SP3, when the conductivity of the mixed wastewater in the anion exchanger and the cation exchanger is reduced to a set value, the regeneration step can be carried out by acid and alkali, and because most of acid and alkali are cleaned in SP2, the acid and alkali consumption is less; in SP4, the first conductivity online detector and the second conductivity online detector detect lower data, when reaching a set value more definite than the set value in SP3, the regeneration is completed, the acid and alkali supply is stopped, the excess acid and alkali are washed away when the clear water supply is carried out, and the salt content of the mixed waste water in the anion exchanger and the cation exchanger is low at this stage, which meets the standards of cooling water and can be discharged into the circulating pool.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the waste water meeting the standard is used as circulating cooling water of a power plant, so that the utilization rate of resources is improved, the consumption of the resources is reduced, and the cost is saved;
2. through in advance neutralizing the waste water of arranging to the circulation pond, shorten the time that waste water treatment can be utilized into power plant's cooling water greatly, improved the treatment effeciency, practiced thrift the cost.
Drawings
FIG. 1 is a schematic view of a three-dimensional structure according to a first embodiment;
fig. 2 is a schematic perspective view of a structure of a transition box and an upper portion thereof according to the first embodiment.
Reference numerals: 1. an anion exchanger; 11. a first recovery main pipe; 111. a first forward wash recovery tube; 112. a first middle row of recovery pipes; 113. a first forward wash recovery valve; 114. a first intermediate discharge recovery valve; 12. a first conductivity online detection piece; 2. a cation exchanger; 21. a second recovery mother pipe; 211. a second forward washing recovery pipe; 212. a second middle row recovery pipe; 213. a second forward wash recovery valve; 214. a second intermediate discharge recovery valve; 22. a second conductivity on-line detecting member; 3. a neutralization pond; 31. a middle drainage blow-off pipe; 32. a middle drainage blowoff valve; 4. a circulation tank; 41. adding an acid box; 42. adding an alkali box; 43. an addition pipe; 44. adjusting a valve; 5. a transition box; 51. a partition plate; 52. a water falling liner; 53. a three-way pipe; 531. a flow distribution plate; 533. a flow rate detecting member; 534. a neutralization disk; 535. a hollow ball; 536. a liquid outlet pipe; 538. a pH detection member; 54. alternating the tubes; 55. a fixed mount; 56. a drive assembly; 561. a motor; 562. a threaded gear; 563. a toothed ring; 57. a water level sensor; 61. a discharge pipe; 62. a water injection pipe; 63. and (4) regenerating the tube.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings.
The first embodiment is as follows:
a recovery system of ion exchange regeneration waste water, referring to figure 1, comprises an anion exchanger 1, a cation exchanger 2, a neutralization tank 3 and a circulation tank 4, wherein the anion exchanger 1 and the cation exchanger 2 are connected with the neutralization tank 3, and the anion exchanger 1 and the cation exchanger 2 are also connected with the circulation tank 4.
A first recovery main pipe 11 is arranged at the bottom of the anion exchanger 1, and the outlet end of the first recovery main pipe 11 is connected with a first forward washing recovery pipe 111 and a first middle discharge recovery pipe 112; a first forward washing recovery valve 113 is arranged on the first forward washing recovery pipe 111, and the first forward washing recovery valve 113 adjusts the on-off and the flow rate of the first forward washing recovery pipe 111; a first intermediate discharge recovery valve 114 is installed on the first intermediate discharge recovery pipe 112, and the first intermediate discharge recovery valve 114 regulates the on/off and the flow rate of the first intermediate discharge recovery pipe 112. The first forward recovery pipe 111 leads to the circulation tank 4, and the first middle discharge recovery pipe 112 leads to the neutralization tank 3. The first forward washing recovery valve 113 and the first middle discharge recovery valve 114 employ solenoid valves.
The cation exchanger 2 is provided with a second recovery main pipe 21, and the second recovery main pipe 21 is connected with a second forward washing recovery pipe 211 and a second middle discharge recovery pipe 212; a second forward washing recovery valve 213 is arranged on the second forward washing recovery pipe 211, and the second forward washing recovery valve 213 adjusts the on-off and the flow rate of the second forward washing recovery pipe 211; the second middle discharge recovery pipe 212 is provided with a second middle discharge recovery valve 214, and the second middle discharge recovery valve 214 adjusts the on-off and the flow rate of the second middle discharge recovery pipe 212. The second forward washing recovery valve 213 and the second intermediate discharge recovery valve 214 employ solenoid valves.
The first recovery main pipe 11 is provided with a first conductivity online detector 12 electrically connected with the first forward washing recovery valve 113 and the first middle discharge recovery valve 114, the second recovery main pipe 21 is provided with a second conductivity online detector 22 electrically connected with the second forward washing recovery valve 213 and the second middle discharge recovery valve 214, and the first conductivity online detector 12 and the second conductivity online detector 22 both adopt GTCON-400AG online conductivity meters. Judging the flow direction of the wastewater according to the detected conductivity results of the first conductivity online detector 12 and the second conductivity online detector 22, and when the flow direction is higher than a set value, opening the first middle discharge recovery valve 114 and the second middle discharge recovery valve 214, and closing the first forward washing recovery valve 113 and the second forward washing recovery valve 213; below the set value, the opposite is true.
Referring to fig. 2, a transition box 5 is fixedly arranged on the circulation tank 4, the interior of the transition box 5 is divided into two identical parts by a partition plate 51, and a water falling liner 52 is arranged at the bottom of the transition box 5 of each part. The circulation tank 4 is provided with a T-shaped three-way pipe 53, the first forward washing recovery pipe 111 and the second forward washing recovery pipe 211 are respectively connected with the branch pipes of the three-way pipe 53 which are positioned on the same straight line, and the two waste waters are mixed in the three-way pipe 53. The three-way pipe 53 is located the one end that is close to each other of two pipelines on the collinear and all is provided with flow distribution plate 531, and two flow distribution plates 531 are relative setting, and all seted up the through-hole (not shown in the figure) on two flow distribution plates 531, and the through-hole on two flow distribution plates 531 is the setting of staggering for the trickle of two strands of waste water can crisscross converge, accelerates the speed of neutralization.
The third branch pipe of the three-way pipe 53 is communicated to the upper part of the partition plate 51 of the transition box 5, an L-shaped alternate pipe 54 is rotatably and hermetically connected to the outlet end of the third branch pipe of the three-way pipe 53, and the alternate pipe 54 horizontally rotates.
A fixing frame 55 is fixed on the transition box 5, a driving assembly 56 for driving the alternating pipe 54 to rotate is arranged on the fixing frame 55, the driving assembly 56 comprises a motor 561, a threaded gear 562 and a toothed ring 563, the motor 561 is fixedly arranged on the fixing frame 55, the threaded gear 562 is arranged on an output shaft of the motor 561, the toothed ring 563 is arranged on the outer wall of the alternating pipe 54, and the toothed ring 563 is meshed with the threaded gear 562; the output shaft of the motor 561 rotates to drive the threaded gear 562 to rotate, the threaded gear 562 rotates to drive the toothed ring 563 to rotate, the alternating pipe 54 and the toothed ring 563 synchronously rotate, and the rotation of the alternating pipe 54 is achieved.
Each part inside the transition box 5 is provided with a water level sensor 57, the water level sensor 57 is electrically connected with the motor 561, and the position where the water level sensor 57 is installed corresponds to the highest water level of the downpipe 52, i.e., when the water level sensor 57 receives a signal, the downpipe 52 is at a moment to be opened. When one of the fall bladders 52 is opened, the motor 561 is activated, passing the outlet of the alternate tube 54 from one section of the transition box 5 to the other, injecting the waste water into the other section.
The transition box 5 is provided with an acid adding box 41 and an alkali adding box 42, a flow detection piece 533 and a hollow neutralizing disc 534 are sequentially arranged on a branch pipe 53 connected with an alternate pipe 54 from one end close to a pipe orifice to one end far away from an opening of the branch pipe, a pH detection piece 538 is arranged on the branch pipe 53 positioned on the flow detection piece 533 and the neutralizing disc 534, the flow detection piece 533 adopts an electromagnetic flowmeter with the model of MIK-LDG, and the pH detection piece 538 adopts a pH controller with the model of SIN-pH 160. The neutralizing disc 534 comprises a hollow ball 535 and a plurality of liquid outlet pipes 536, the liquid outlet pipes 536 are fixedly arranged on the outer wall of the hollow ball 535 in a launching manner and are positioned on the same horizontal plane, one ends of the liquid outlet pipes 536, which are connected with the hollow ball 535, are communicated with the hollow ball 535, one ends of the liquid outlet pipes 536, which are far away from the hollow ball 535, are respectively and fixedly arranged on the inner wall of the three-way pipe 53, and one side, facing the outlet of the three-way pipe 53, of the liquid outlet pipes 536 is provided with liquid outlet holes.
The acid adding box 41 and the alkali adding box 42 are respectively provided with an adding pipe 43 which passes through the pipe wall of the three-way pipe 53 and is connected with the liquid outlet pipe 536, each adding pipe 43 is connected with a water pump, the adding pipe 43 is provided with an adjusting valve 44, the adjusting valve 44 adopts an electromagnetic valve, the adjusting valve 44 is electrically connected with the flow detection piece 533 and the pH detection piece 538, and the adjusting valve 44 controls the flow of the adding pipe 43 according to the detection results of the flow detection piece 533 and the pH detection piece 538 so that the adding amount can be neutralized with the waste water.
In order to control the amount of wastewater that falls into the transition tank 5 per unit time of the three-way pipe 53 to be equal to the amount of wastewater discharged per unit time of the transition tank 5 and to reduce the amount of wastewater that falls into the transition tank 5 excessively or excessively, the regulating valve 44, the flow rate detector 533, the first forward-wash recovery valve 113, and the second forward-wash recovery valve 213 are electrically connected. The discharge amount of the wastewater from the transition tank 5 to the circulation tank 4 is constant, and after the adjusting valve 44 is adjusted according to the flow rate and the pH value, the adjusting valve 44, the first forward washing recovery valve 113 and the second forward washing recovery valve 213 are synchronously adjusted again to meet the condition that the amount of the wastewater falling into the transition tank 5 in the unit time of the three-way pipe 53 is the same as the discharge amount of the wastewater in the unit time of the transition tank 5, so that the progress of the two parts of the transition tank 5 is just opposite in the alternation process of the alternation pipe 54.
Referring to fig. 1, the neutralization tank 3 is provided with the same structure as the circulation tank 4, and the purpose of rapid neutralization is achieved, so that wastewater can be treated in time. The neutralization tank 3 is provided with a middle drainage and discharge pipe 31 for discharging the wastewater to a wastewater treatment center; the middle drainage and sewage discharge pipe 31 is provided with a middle drainage and sewage discharge valve 32, and the middle drainage and sewage discharge valve 32 adopts an electromagnetic valve and is used for controlling the on-off and the flow of the middle drainage and sewage discharge valve 32.
The working principle of the embodiment is as follows:
after the anion exchanger 1 and the cation exchanger 2 are cleaned, the waste water of the anion exchanger 1 is discharged from the first recovery main pipe 11, the waste water of the cation exchanger 2 is discharged from the second recovery main pipe 21, the flow direction of the waste water is judged according to the conductivity results detected by the first conductivity online detection piece 12 and the second conductivity online detection piece 22, when the flow direction of the waste water is higher than a set value, the first middle discharge recovery valve 114 and the second middle discharge recovery valve 214 are opened, and the first forward washing recovery valve 113 and the second forward washing recovery valve 213 are closed; below the set value, the opposite is true.
If the amount of the wastewater is less than the set value, the wastewater flows into the three-way pipe 53, then passes through the diversion of the diversion plate 531, the two wastewater flows in a staggered manner, and then passes through the detection of the flow rate detection member 533 and the pH detection member 538, and the amount of the acid or the alkali introduced is adjusted by the adjusting valve 44 according to the detected result. After comparing the discharge amount of the transition tank 5, the first and second forward- wash recovery valves 113 and 213 are adjusted, and the regulating valve 44 is delay-adjusted until the discharge amount of the transition tank 5 is close to or equal.
The wastewater in the three-way pipe 53 is firstly discharged into one part of the transition box 5, when the water level sensor 57 detects that the water level reaches a set point, the water level sensor 57 sends an electric signal to the motor 561, the motor 561 is started to drive the alternate pipe 54 to rotate, and meanwhile, the water dropping liner 52 is opened, so that the wastewater falls into the circulating tank 4; the water outlet of the alternate pipe 54 is transferred to the other part of the transition box 5, the wastewater is filled, when the water level sensor 57 of the part also detects the wastewater, the alternate pipe 54 is transferred to the original part of the transition box 5 again in the same way, and the wastewater of the original part of the transition box 5 is discharged and is sequentially repeated.
The principle of the neutralization tank 3 is the same as that of the circulation tank 4, and the neutralization tank 3 discharges the wastewater to a wastewater treatment center through a middle discharge drain pipe 31. The water from the circulation tank 4 is then fed to the power plant for use as cooling water.
An ion exchange regeneration wastewater treatment process, as shown in figure 1, comprises the following steps:
SP 1: firstly, discharging the waste water of the pressed layers in the anion exchanger 1 and the cation exchanger 2 to a circulating pool 4 through a water discharge pipe 61, and collecting the part of water with low salt content;
SP 2: introducing clean water into the anion exchanger 1 and the cation exchanger 2 through a water injection pipe 62, washing the resin, mixing and discharging the waste water washed by the anion exchanger 1 and the cation exchanger 2 to a neutralization tank 3, and reducing the amount of acid or alkali in the anion exchanger 1 and the cation exchanger 2;
SP 3: regeneration, when the values detected by the first conductivity online detector 12 and the second conductivity online detector 22 are reduced to a set value, the clear water is continuously added, the acid/alkaline solution is correspondingly introduced through the regeneration pipe 63 for replacement regeneration, and the wastewater is also mixed and discharged into the neutralization tank 3;
SP 4: when the values detected by the first conductivity online detecting element 12 and the second conductivity online detecting element 22 decrease to a set value lower than the set value in SP3, the supply of the acid/alkali solution is stopped, and the water is further supplied for half an hour, and the wastewater cleaned by the anion exchanger 1 and the cation exchanger 2 is discharged to the circulation tank 4.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and it should be understood that a person having ordinary skill in the art can make several modifications and decorations without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A recovery system of ion exchange regeneration waste water, comprising an anion exchanger (1) and a cation exchanger (2), characterized in that: the anion exchanger (1) is provided with a first recovery main pipe (11), the first recovery main pipe (11) is connected with a first forward washing recovery pipe (111) and a first middle discharge recovery pipe (112), the first forward washing recovery pipe (111) is provided with a first forward washing recovery valve (113), and the first middle discharge recovery pipe (112) is provided with a first middle discharge recovery valve (114);
the cation exchanger (2) is provided with a second recovery main pipe (21), the second recovery main pipe (21) is connected with a second forward washing recovery pipe (211) and a second middle discharge recovery pipe (212), a second forward washing recovery valve (213) is arranged on the second forward washing recovery pipe (211), and a second middle discharge recovery valve (214) is arranged on the second middle discharge recovery pipe (212);
the first middle discharge recovery pipe (112) and the second middle discharge recovery pipe (212) are connected with a neutralization tank (3), the neutralization tank (3) is provided with a middle discharge blow-off pipe (31), and the middle discharge blow-off pipe (31) is provided with a middle discharge blow-off valve (32); the first forward washing recovery pipe (111) and the second forward washing recovery pipe (211) are connected with a circulation tank (4);
the first recovery main pipe (11) is provided with a first conductivity online detection piece (12) which is electrically connected with the first forward washing recovery valve (113) and the first middle discharge recovery valve (114), and the second recovery main pipe (21) is provided with a second conductivity online detection piece (22) which is electrically connected with the second forward washing recovery valve (213) and the second middle discharge recovery valve (214).
2. The system for recovering ion exchange regeneration wastewater according to claim 1, wherein: the circulating pool (4) is provided with an acid adding box (41) and an alkali adding box (42), and the circulating pool (4) is provided with a pH detection piece (538) which is electrically connected with the acid adding box (41) and the alkali adding box (42);
the circulation tank (4) is provided with a T-shaped three-way pipe (53), the first and second forward washing recovery pipes (111, 211) are respectively connected with the branch pipes of the three-way pipe (53) which are positioned on the same straight line, and the third branch pipe of the three-way pipe (53) is communicated to the upper part of the circulation tank (4);
a flow detection piece (533) and a hollow neutralizing disc (534) are sequentially arranged on the third branch pipe of the three-way pipe (53) from one end close to the pipe orifice to one end far away from the opening of the third branch pipe, the pH detection piece (538) is arranged on the three-way pipe (53) positioned on the flow detection piece (533) and the neutralizing disc (534), the neutralizing disc (534) comprises a hollow ball (535) and a plurality of liquid outlet pipes (536) which are arranged on the outer wall of the hollow ball (535) in a launching manner and are positioned on the same horizontal plane, the liquid outlet pipes (536) are connected with the inner wall of the third branch pipe of the three-way pipe (53), and liquid outlet holes are formed in the liquid outlet pipes (536);
the acid adding box (41) and the alkali adding box (42) are respectively provided with an adding pipe (43) which penetrates through the pipe wall of the three-way pipe (53) and is connected with the liquid outlet pipe (536), the adding pipes (43) are respectively connected with a water pump, and the adding pipes (43) are respectively provided with a regulating valve (44) which is electrically connected with the pH detecting piece (538) and the flow detecting piece (533).
3. The system for recovering ion exchange regeneration wastewater according to claim 2, wherein: the three-way pipe (53) is located the one end that is close to each other of two pipelines on the same straight line and all is provided with flow distribution plate (531), two flow distribution plate (531) are relative setting, and two all seted up the through-hole on flow distribution plate (531), and two on flow distribution plate (531) the through-hole is the setting of staggering.
4. The system for recovering ion exchange regeneration wastewater according to claim 2, wherein: the circulating tank (4) is provided with a transition tank (5), the acid adding tank (41) and the alkali adding tank (42) are arranged on the circulating tank (4), the transition tank (5) is divided into two parts by a partition plate (51), and the bottom of the transition tank (5) of each part is provided with a water falling liner (52); the three-way pipe tee joint is characterized in that a fixing frame (55) is arranged on the transition box (5), an outlet end of a third branch pipe of the three-way pipe (53) is rotatably and hermetically connected with an L-shaped alternate pipe (54), a driving assembly (56) for driving the alternate pipe (54) to rotate is arranged on the fixing frame (55), a water level sensor (57) electrically connected with the driving assembly (56) is arranged in the transition box (5), the adjusting valve (44), the flow detection member (533), the first forward washing recovery valve (113) and the second forward washing recovery valve (213) are electrically connected, and the waste water amount falling into the transition box (5) in unit time of the three-way pipe (53) is the same as the waste water discharge amount in unit time of the transition box (5).
5. The system for recovering ion exchange regeneration wastewater according to claim 4, wherein: the driving assembly (56) comprises a motor (561) which is installed on the fixed frame (55) and is electrically connected with the water level sensor (57), a threaded gear (562) which is installed on an output shaft of the motor (561), and a toothed ring (563) which is arranged on the outer wall of the alternating pipe (54) and is meshed with the threaded gear (562).
6. An ion exchange regeneration wastewater treatment process using the recovery system of ion exchange regeneration wastewater according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
SP 1: firstly, discharging the waste water of the pressed layers in the anion exchanger (1) and the cation exchanger (2) to a circulating pool (4) through a drain pipe (61);
SP 2: introducing clean water into the anion exchanger (1) and the cation exchanger (2) through a water injection pipe (62), cleaning the resin, mixing the wastewater cleaned by the anion exchanger (1) and the cation exchanger (2) and discharging the wastewater to a neutralization pond (3);
SP 3: regeneration, when the values detected by the first conductivity online detection part (12) and the second conductivity online detection part (22) are reduced to set values, clear water is continuously added at the moment, acid/alkaline solution is correspondingly introduced through a regeneration pipe (63) for replacement regeneration, and wastewater is also mixed and discharged into the neutralization tank (3);
SP 4: when the values detected by the first conductivity online detection element (12) and the second conductivity online detection element (22) decrease to a set value lower than the set value in SP3, the supply of the acid/alkali solution is stopped, and the water is further supplied for half an hour, and the wastewater cleaned by the anion exchanger (1) and the cation exchanger (2) is discharged to the circulation tank (4).
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