CN210393987U - Coal gasification and fluoride-containing wastewater treatment system of chemical fertilizer plant - Google Patents
Coal gasification and fluoride-containing wastewater treatment system of chemical fertilizer plant Download PDFInfo
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- CN210393987U CN210393987U CN201920852279.4U CN201920852279U CN210393987U CN 210393987 U CN210393987 U CN 210393987U CN 201920852279 U CN201920852279 U CN 201920852279U CN 210393987 U CN210393987 U CN 210393987U
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Abstract
The utility model discloses a coal gasification and fluoride waste water treatment system of chemical fertilizer factory, include: the device comprises an online detector, an adjusting tank, integrated flocculation precipitation equipment, a pH adjusting tank, a buffer tank and a defluorination filter, wherein the adjusting tank is connected with the online detector; the integrated flocculation precipitation equipment is connected with the online detector and the regulating tank; the pH adjusting tank is connected with the adjusting tank; the buffer tank is connected with the pH adjusting tank, and the defluorination filter is connected with the buffer tank. This coal gasification and fluoride waste water treatment system of chemical fertilizer factory can realize having strengthened the flexibility of technology greatly, and operation degree of automation is high, and is simple and convenient, and integration preliminary treatment flocculation and precipitation equipment can change and adjust at any time according to the demand, switches when having the demand and gets into operation operating condition, need not to ask time can switch the stop work and reduce the running cost, and this integration preliminary treatment flocculation and precipitation equipment still can be on-vehicle or hoist and mount, has high practicality and flexibility.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a coal gasification and fluoride-containing wastewater treatment system of a chemical fertilizer plant.
Background
The wastewater treatment is to treat the wastewater by physical, chemical and biological methods, so that the wastewater is purified, the pollution is reduced, the wastewater is recycled and reused, and water resources are fully utilized. The process of separating each pollutant in the wastewater or converting the pollutant into harmless substances attaches more importance to environmental protection along with the continuous development of society, needs to purify industrial wastewater, biological sewage, culture wastewater and the like, avoids polluting the environment, and is important for treating coal gasification fluorine-containing wastewater and fluorine-containing wastewater of chemical fertilizer factories.
At present, the process for treating the coal gasification fluorine-containing wastewater and the fluorine-containing wastewater of chemical fertilizer factories is poor in flexibility, low in operation automation degree and complex in process, and cannot be suitable for sewage treatment with limited spatial position and engineering reconstruction, and can not be changed and adjusted at any time according to requirements by adopting integrated pretreatment flocculation precipitation equipment, so that the coal gasification fluorine-containing wastewater and the fluorine-containing wastewater of chemical fertilizer factories can be switched to enter an operation working state when in demand, the work can be switched to stop working to reduce and reduce the operation cost when in no demand, and the purpose of improving the practicability and flexibility of the integrated pretreatment flocculation precipitation equipment can not be achieved, thereby being very unfavorable for the treatment of the coal gasification fluorine-containing wastewater and the fluorine-containing.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model is not enough to prior art, the utility model provides a coal gasification and fluoride waste water treatment system of chemical fertilizer factory, the technology that current coal gasification fluoride waste water and chemical fertilizer factory fluoride waste water handled has been solved, the flexibility is relatively poor, operation degree of automation is low, and the technology is complicated, can not be applicable to the sewage treatment that spatial position is limited and reform transform the engineering, can not realize changing at any time and adjusting according to the demand through adopting integration preliminary treatment flocculation and precipitation equipment, switch when having the demand and get into operation operating condition, can switch the stop work when not having the demand and reduce running cost, can't reach the problem that improves integration preliminary treatment flocculation and precipitation equipment practicality and flexibility purpose.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a coal gasification and fertilizer plant fluorine-containing wastewater treatment system comprises: the system comprises an online detector, an adjusting tank, integrated flocculation and precipitation equipment, a pH adjusting tank, a buffer tank and a defluorination filter, wherein the online detector is used for detecting the fluorine content of the wastewater; the regulating tank is connected with the online detector and is used for homogenizing and equalizing the wastewater; the integrated flocculation and precipitation equipment is connected with the online detector and the regulating reservoir, when the online detector detects that the fluorine content of the wastewater is less than or equal to a threshold value, the wastewater enters the regulating reservoir, and when the online detector detects that the fluorine content of the wastewater is greater than the threshold value, the wastewater enters the integrated flocculation and precipitation equipment, is treated by the integrated flocculation and precipitation equipment and then enters the regulating reservoir; the pH adjusting tank is connected with the adjusting tank, and the wastewater which is homogenized and equalized by the adjusting tank enters the pH adjusting tank to adjust the pH value; the buffer tank with the pH equalizing basin is connected, the defluorination filter with the buffer tank is connected, and waste water passes through after pH value adjusts the buffer tank, gets into from the bottom the defluorination filter, process the defluorination filter is handled the fluoride content and is discharged after up to standard.
Further, the fluorine removal filter needs to be backwashed and regenerated periodically, and the system further comprises: and the backwash liquid storage pool is connected with the defluorination filter, and backwash water and regeneration liquid of the defluorination filter are discharged to the backwash liquid storage pool.
Further, the system further comprises: and the sludge tank is connected with the backwash liquid storage tank, the backwash water and the regeneration liquid are discharged to the backwash liquid storage tank, and after natural sedimentation, bottom sludge is conveyed to the sludge tank.
Further, the system further comprises: and the flocculation and precipitation equipment is connected with the backwash liquid storage tank, the sludge tank and the regulating tank, backwash water and regenerated liquid are discharged to the backwash liquid storage tank, supernatant is conveyed to the flocculation and precipitation equipment after natural precipitation, the supernatant is conveyed to the regulating tank after treatment of the flocculation and precipitation equipment, and bottom sludge is conveyed to the sludge tank.
Further, the system comprises: the device comprises a metering pump and a pipeline mixer, wherein the pipeline mixer is used for connecting the regulating tank and the pH value regulating tank, and acid liquor or alkali liquor is added into the pipeline mixer through the metering pump when wastewater enters the pH value regulating tank from the regulating tank.
Further, a filter screen and/or quartz sand are arranged at the bottom of the defluorination filter, and an activated alumina filler is arranged above the filter screen and/or the quartz sand.
Further, the system further comprises: and the cache pool is connected with the online detector and the integrated flocculation and precipitation equipment and is used for adsorbing and treating the wastewater through the activated carbon.
(III) advantageous effects
The utility model provides a coal gasification and fluoride-containing wastewater treatment system of chemical fertilizer plant. Compared with the prior art, the method has the following beneficial effects: this coal gasification and fluoride waste water treatment system of fertilizer factory includes: the system comprises an online detector, an adjusting tank, integrated flocculation and precipitation equipment, a pH adjusting tank, a buffer tank and a defluorination filter, wherein the online detector is used for detecting the fluorine content of the wastewater; the regulating tank is connected with the online detector and is used for homogenizing and equalizing the wastewater; the integrated flocculation and precipitation equipment is connected with the online detector and the regulating reservoir, when the online detector detects that the fluorine content of the wastewater is less than or equal to a threshold value, the wastewater enters the regulating reservoir, and when the online detector detects that the fluorine content of the wastewater is greater than the threshold value, the wastewater enters the integrated flocculation and precipitation equipment, is treated by the integrated flocculation and precipitation equipment and then enters the regulating reservoir; the pH adjusting tank is connected with the adjusting tank, and the wastewater which is homogenized and equalized by the adjusting tank enters the pH adjusting tank to adjust the pH value; the surge tank with the pH equalizing basin is connected, the defluorination filter with the surge tank is connected, and waste water passes through after pH value adjusts the surge tank, gets into the defluorination filter, passes through the defluorination filter is handled fluoride content and is discharged after up to standard, can realize having strengthened the flexibility of technology greatly, and operation degree of automation is high, and is simple and convenient, especially to spatial position is limited and reform transform the engineering and be particularly suitable for, and integration preliminary treatment flocculation and precipitation equipment can change and adjust at any time according to the demand, switches when having the demand and gets into operation operating condition, can switch the stop work when not having the demand and reduce running cost, and this integration preliminary treatment flocculation and precipitation equipment can also be on-vehicle or hoist a certain idle position and have high practicality and flexibility.
Drawings
FIG. 1 is a schematic view of a system for treating fluorine-containing wastewater from a coal gasification and chemical fertilizer plant according to the present invention;
FIG. 2 is a schematic block diagram of a process for treating fluorine-containing wastewater from coal gasification and fertilizer plants according to an embodiment of the present invention;
FIG. 3 is a front view of an integrated flocculation and sedimentation equipment structure according to an embodiment of the present invention;
FIG. 4 is a top view of an integrated flocculation and sedimentation device structure according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the openings of the water distributor according to the embodiment of the present invention;
FIG. 6 is a schematic view of an opening of a mud pipe according to an embodiment of the present invention;
FIG. 7 is a flow chart of a process for coal gasification and treatment of fluoride-containing wastewater from a fertilizer plant according to an embodiment of the present invention;
FIG. 8 is a data table diagram of various indexes of treated inlet and outlet water quality according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 8, an embodiment of the present invention provides a technical solution: a coal gasification and fertilizer plant fluorine-containing wastewater treatment system comprises: the system comprises an online detector, an adjusting tank, integrated flocculation precipitation equipment, a pH adjusting tank, a buffer tank and a defluorination filter, wherein the online detector is used for detecting the fluorine content of the wastewater; the regulating tank is connected with the online detector and is used for homogenizing and equalizing the wastewater; the integrated flocculation and precipitation equipment is connected with the online detector and the regulating reservoir, when the online detector detects that the fluorine content of the wastewater is less than or equal to a threshold value, the wastewater enters the regulating reservoir, and when the online detector detects that the fluorine content of the wastewater is greater than the threshold value, the wastewater enters the integrated flocculation and precipitation equipment, is treated by the integrated flocculation and precipitation equipment and then enters the regulating reservoir; the pH adjusting tank is connected with the adjusting tank, and the wastewater after being homogenized and equalized in the adjusting tank enters the pH adjusting tank to adjust the pH value; the buffer tank is connected with the pH adjusting tank, the defluorination filter is connected with the buffer tank, the wastewater enters the defluorination filter from the bottom through the buffer tank after being adjusted by the pH value, and the wastewater is discharged after the fluoride content reaches the standard through the defluorination filter.
Optionally, the fluorine removal filter requires periodic backwashing and regeneration, and the system further comprises: and the backwash liquid storage pool is connected with the defluorination filter, and the backwash water and the regeneration liquid of the defluorination filter are discharged to the backwash liquid storage pool.
Optionally, the system further comprises: and the sludge tank is connected with the backwash liquid storage tank, backwash water and regeneration liquid are discharged to the backwash liquid storage tank, and after natural precipitation, bottom sludge is conveyed to the sludge tank.
Optionally, the system further comprises: the flocculation and precipitation equipment is connected with the backwash liquid storage tank, the sludge pool and the regulating reservoir, backwash water and regenerated liquid are discharged to the backwash liquid storage tank, after natural precipitation, supernatant is conveyed to the flocculation and precipitation equipment, after the treatment of the flocculation and precipitation equipment, the supernatant is conveyed to the regulating reservoir, and bottom sludge is conveyed to the sludge pool.
Optionally, the system comprises: the device comprises a metering pump and a pipeline mixer, wherein the pipeline mixer is used for connecting an adjusting tank and a pH value adjusting tank, and acid liquor or alkali liquor is added into the pipeline mixer through the metering pump when waste water enters the pH adjusting tank from the adjusting tank.
Optionally, the bottom of the fluorine removal filter is provided with a screen and/or quartz sand, and an activated alumina filler is arranged above the screen and/or quartz sand.
Optionally, the system further comprises: and the buffer pool is connected with the online detector and the integrated flocculation and precipitation equipment and is used for adsorbing and treating the wastewater through the activated carbon.
The embodiment of the utility model provides a coal gasification and fertilizer factory fluoride waste water treatment process are still provided, and this technology can be used to the utility model discloses a coal gasification and fertilizer factory fluoride waste water treatment system, optionally, this technology includes following step:
s11, online monitoring and treatment of wastewater: the wastewater firstly enters an online detector, when the online detector detects that the fluorine content of the wastewater is less than or equal to a threshold value, the wastewater directly enters an adjusting tank, and when the online detector detects that the fluorine content of the wastewater is greater than the threshold value, the wastewater enters an integrated flocculation and precipitation device, is treated by the integrated device and then enters the adjusting tank.
In an optional embodiment, when the online detector detects that the fluorine content is less than or equal to 4, the wastewater directly enters the regulating tank, and when the online detector detects that the fluorine content is greater than 4, the wastewater enters the integrated flocculation and precipitation equipment, is treated by the integrated equipment and then enters the regulating tank. Alternatively, if competitive adsorption ions with relatively high content, such as SO42-, Cl-and the like, exist and the content of organic matters is high, a buffer tank needs to be arranged before the integrated flocculation and precipitation equipment, activated carbon is added for adsorption, and the adsorbed competitive adsorption ions enter the integrated flocculation and precipitation equipment. Optionally, before the water pump is started, whether an inlet valve and an outlet valve are opened or not is checked, whether foreign matters exist on the periphery of a transmission shaft or not is checked, the water level of a self-sucking tank is not lower than one half, and when sampling is carried out for detection, water in a pipeline of a sampling valve is drained firstly, so that a water sample is ensured to be fresh water;
s12, homogenizing and adjusting the pH of the wastewater: homogenizing and homogenizing the wastewater by an adjusting tank, conveying the wastewater to a pH adjusting tank, and adjusting the pH value of the wastewater to a preset range;
in an optional embodiment, the preset range of the pH value is 6.5-7.0, the raw water is homogenized and equalized by a regulating reservoir, and then is lifted to the pH regulating reservoir by a variable frequency conveying pump, concentrated sulfuric acid is added into a pipeline mixer by a metering pump in the process, so that the pH value reaches 6.5-7.0, before the variable frequency water inlet pump is started, a water inlet valve of a defluorination filter or a main pipeline communicating valve needs to be opened, the pressure of a control cabinet is set to be 0.05Mpa, the pressure is increased to the required pressure after half a minute, when the reading of a flowmeter is disordered, an exhaust valve at the upper part of a buffer tank needs to be opened until the water is discharged, and the concentrated sulfuric acid dosing pipeline is prevented from being impacted and;
s13, defluorination treatment of wastewater: and (3) conveying the wastewater in the pH adjusting tank to a buffer tank, and then feeding the wastewater into a defluorination filter from the bottom, wherein a filter screen and/or quartz sand are arranged at the bottom of the defluorination filter, an activated alumina filler is arranged above the filter screen and/or quartz sand, and the wastewater is discharged after the fluoride content of the wastewater reaches the standard.
In an optional embodiment, raw water in the pH adjusting tank is conveyed to the buffer tank through the variable-frequency water inlet pump and then enters the defluorination filter from the bottom, a filter screen and quartz sand are paved at the bottom of the filter, the turbidity and suspended matters of the inlet water can be reduced, a large amount of activated alumina filler is arranged above the quartz sand, fluoride in the water can be effectively adsorbed, and the outlet water is discharged to the main drainage channel after the fluoride content reaches the standard. Optionally, floating impurities in water in the water inlet filter screen and the regulating reservoir are cleaned in time, the defluorination filter is defluorination equipment, the inlet water turbidity is required to meet the requirement, when the water inlet and outlet amount is regulated, the outlet butterfly valve and the direct discharge communicating butterfly valve are slowly rotated, and the communicating butterfly valve is completely closed in normal operation, so that the water quality of outlet water is prevented from being interfered;
optionally, the coal gasification and fluoride-containing wastewater treatment process in a fertilizer plant according to the embodiment of the present invention further includes:
s21, backwashing and regenerating the fluorine removal filter: feeding backwash water from the top of the defluorination filter, discharging water from a bottom backwashing pipe, backwashing the defluorination filter, conveying regeneration liquid into the defluorination filter from the bottom of the defluorination filter until the defluorination filter is full, soaking filter materials, emptying and washing after soaking is finished, and finishing the regeneration of the defluorination filter;
s22, natural precipitation treatment of backwashing water and regeneration liquid: discharging backwash water or regenerated liquid to a backwash liquid storage tank, conveying bottom sludge to a sludge tank after natural sedimentation, and conveying supernate to flocculation precipitation equipment;
s23, flocculation treatment of wastewater: respectively adding calcium ion-containing solution and a flocculating agent into the flocculation precipitation equipment, precipitating the mixed solution, conveying bottom sludge to a sludge tank, and conveying supernatant to a regulating tank.
In an optional embodiment, according to the water quality and quantity of inlet water, the fluorine removal filter needs to be regularly backwashed and regenerated, backwashing water is raw water, water is fed from the top of the filter, water is discharged from a bottom backwashing pipe, regenerated liquid is aluminum sulfate solution prepared by clean water or raw water with lower turbidity and is conveyed into the filter from the bottom of the filter through a regeneration pump until the filter is full and circulated for 15 minutes, then the regeneration pump is stopped, a regeneration electric valve is closed, filter materials are soaked, the filter materials are emptied and washed after soaking is completed, then the filter materials are put into normal use, a certain time is needed for opening and closing an electric butterfly valve on the fluorine removal filter, about 15 seconds are needed, after the electric butterfly valve is completely opened or closed in daily operation, next operation is carried out, the electric valve is prohibited to be opened simultaneously in an automatic mode and a manual mode, and during regeneration, the regenerated, opening a corresponding filter regeneration electric valve, starting a regeneration pump, filling the regeneration tank with liquid medicine, stopping the regeneration pump, closing the regeneration electric valve, emptying the filter, starting an emptying electric valve and opening a sampling valve; discharging backwash water and regeneration liquid to a backwash liquid storage tank, conveying bottom sludge to a sludge tank through a sludge pump after natural sedimentation, and lifting supernatant to flocculation precipitation equipment through a supernatant pump; simultaneously to adding calcium chloride, polyaluminium chloride flocculating agent PAC and polyacrylamide flocculating agent PAM respectively in the flocculation and precipitation equipment, calcium chloride can form the calcium fluoride solid with aquatic high-content fluoride, PAC and PAM can effectively carry out the flocculation and precipitation to aquatic suspended solid and solid, mix liquid behind the pipe chute sedimentation tank, bottom mud passes through the sludge pump and carries to the sludge impoundment, and the supernatant overflows to the clean water basin, returns to the equalizing basin through the clean water pump.
In an optional embodiment, raw water is lifted to an integrated flocculation and precipitation device, the raw water is stirred for three times and four times in the integrated device, calcium chloride is added for the first time, the rotating speed of a stirrer is controlled to be 60-80r/min and the time is 10-15min, polyaluminium chloride flocculant PAC is added for the second time, the stirrer is controlled to be two-stage rotating speed, the rotating speed of a first-stage stirrer is controlled to be 15-30r/min and the stirring time is 5-10min, the rotating speed of a second-stage stirrer is controlled to be 8-15r/min and the time is 10-15min, and the rotating speed of a third-time polyacrylamide flocculant PAM stirrer is controlled to be 5-10r/min and the time is 10-15 min.
In an optional example, the raw water is lifted to a pH adjusting tank by a variable frequency delivery pump, the operation is stopped when the water level of the adjusting tank is lower than 0.5m or the water level of the pH adjusting tank is higher than the designed normal water level by 0.5m by controlling the frequency by an ultrasonic liquid level meter, the low-frequency operation of 10Hz is performed when the water level of the pH adjusting tank is lower than the highest water level and higher than the designed normal water level, and the full-load operation of 50Hz is performed when the water level of the pH adjusting tank is lower than the normal designed water level.
In an optional embodiment, raw water after pH adjustment is pressurized to a defluorination filter through a variable frequency water inlet pump, the frequency is controlled through a constant-pressure water supply power distribution cabinet, after the operating pressure is set, a pressure gauge feedback signal is remotely transmitted through a main pipeline, when the operating pressure is lower than the set pressure, the frequency is increased until the actual pressure is equal to the set pressure, when a first water pump runs at full frequency and does not meet the pressure, a second water pump is automatically started, the frequency is gradually increased, and the like.
In an alternative embodiment, the preset range of the pH value of the wastewater in the pH adjusting tank is 6.5-7.0, concentrated sulfuric acid is added to the pipeline mixer through a metering pump, the pH of raw water is adjusted, monitoring is carried out through an online pH meter, after the metering pump is started, when the pH of the raw water in the water tank is higher than 7.0, sulfuric acid is automatically added, and when the pH of the water tank is lower than 6.5, the metering pump automatically stops running.
In an optional example, the flocculation and precipitation equipment is used for treating wastewater in a backwash liquid storage pool, when the water level of the pool is higher than 2m, a supernatant liquid pump is automatically started, subsequent related equipment is also automatically started, the subsequent related equipment comprises a calcium salt stirrer on the flocculation and precipitation equipment, 3 flocculation stirrers, a calcium chloride metering pump, a PAC metering pump and a PAC tank stirrer, supernatant liquid in the backwash water pool is subjected to precipitation treatment, when the water level of the backwash liquid storage pool is lower than 2m, the supernatant liquid pump is automatically stopped, the related equipment is also stopped, the operation of the related equipment is simultaneously stopped, the state of the supernatant liquid pump is noticed during inspection, an auxiliary clear water pump of the flocculation equipment is controlled to be started and stopped through a floating ball liquid level switch, high liquid level is automatically started, clear water is conveyed to an adjusting.
In an optional embodiment, when the flocculation sedimentation equipment is in operation, the sludge pump is manually started every 4 hours to discharge sludge for 1 hour, the sludge pump of the backwashing water storage pool discharges sludge according to the sludge amount at the bottom of the water pool as required, if the liquid level of the backwashing water pool is higher, and the filter needs backwashing drainage, backwashing water can be discharged to the sludge pool by the sludge pump, and the liquid level height of the backwashing water pool is reduced.
In an optional embodiment, the defluorination filter is in a corresponding operation state by clicking a corresponding key on an electric valve control panel, when the water inlet pressure is increased and the water outlet flow is reduced, backwashing is needed, and when the water quality of the inlet water is normal and the water outlet after backwashing still does not reach the standard, regeneration is needed.
In an optional embodiment, the utility model discloses a control index and technical parameter have:
1. the inlet water is required to contain ① fluorine less than or equal to 5mg/L, ② turbidity less than or equal to 20NTU, too high turbidity can block the filter material pores and affect the defluorination effect, ③ pH value is 6.5-7.0, too high pH value can affect the defluorination effect, ④ ferro-manganese ion content is less than or equal to 0.3mg/L, too high ferro-manganese ion content can block the filter material pores, alumina poisoning is caused, and the service life of the filter material is seriously affected.
2. The working environment parameters are as follows: the pressure of a main pipeline is less than or equal to 0.1Mpa, the pressure of an outlet of a water pump is less than or equal to 0.25Mpa, the working temperature is less than or equal to 40 ℃, the particle size of a filter material is within the range of 1.0-3.0mm, the filtering speed is within the range of 2-10m/h, the pH value and the filtering diameter of the filter material are larger, the filtering speed is lower, the operation period is determined according to the quality of raw water, a backwashing mode adopts raw water washing, the backwashing time is 10-15min, the washing time after regeneration is 20-30min, the backwashing strength is within the range of 18-25L/s.m 2, a regeneration liquid adopts 5-7% of aluminum sulfate, the regeneration time is 3-4h, the regeneration strength is within the range of 8-10L/s.m. 2, calcium chloride is 2% of calcium chloride solution, PAC is 2% of polyaluminium chloride solution, and PA.
Use case
Certain waste water treatment enterprise adopts the utility model discloses a waste water treatment system of embodiment handles coal gasification fluorine-containing waste water and chemical fertilizer factory fluorine-containing waste water, can know by table 7, and the content and the turbidity of the fluoride when handling out water are all than intaking low, consequently the utility model discloses the technology adopts and throws the calcium chloride of throwing and generate calcium fluoride and deposit, and the solubility of calcium fluoride in aqueous when 18 ℃ is 16.3mg/L, is 7.9mg/L according to the fluorine ion meter, and the calcium fluoride of here solubility can form the precipitate. The rate of precipitate formation is slowed down with residual fluorine levels of 10-20 mg/L. The solubility of calcium fluoride is increased when the water contains a certain amount of salts, such as sodium chloride, sodium sulfate, ammonium chloride. Therefore, the fluorine content in the waste water treated by lime is generally not lower than 20-30mg/L, the flexibility of the process can be greatly enhanced, the operation automation degree is high, the operation is simple and convenient, the device is particularly suitable for limited space positions and reconstruction projects, the integrated pretreatment flocculation precipitation device can be changed and adjusted at any time according to requirements, the device is switched to enter an operation working state when in need, the device can be switched to stop working when in no need to reduce and reduce the operation cost, and the integrated pretreatment flocculation precipitation device can be mounted on a vehicle or hoisted to a certain idle position and has high practicability and flexibility.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a coal gasification and fluoride waste water treatment system of fertilizer factory which characterized in that, the system includes: an on-line detector, an adjusting tank, an integrated flocculation precipitation device, a pH adjusting tank, a buffer tank and a defluorination filter, wherein,
the online detector is used for detecting the fluorine content of the wastewater;
the regulating tank is connected with the online detector and is used for homogenizing and equalizing the wastewater;
the integrated flocculation and precipitation equipment is connected with the online detector and the regulating reservoir, when the online detector detects that the fluorine content of the wastewater is less than or equal to a threshold value, the wastewater enters the regulating reservoir, and when the online detector detects that the fluorine content of the wastewater is greater than the threshold value, the wastewater enters the integrated flocculation and precipitation equipment, is treated by the integrated flocculation and precipitation equipment and then enters the regulating reservoir;
the pH adjusting tank is connected with the adjusting tank, and the wastewater which is homogenized and equalized by the adjusting tank enters the pH adjusting tank to adjust the pH value;
the buffer tank with the pH equalizing basin is connected, the defluorination filter with the buffer tank is connected, and waste water passes through after pH value adjusts the buffer tank, gets into from the bottom the defluorination filter, process the defluorination filter is handled the fluoride content and is discharged after up to standard.
2. The coal gasification and fertilizer plant fluorine-containing wastewater treatment system of claim 1, wherein the defluorination filter requires periodic backwashing and regeneration, the system further comprising: and the backwash liquid storage pool is connected with the defluorination filter, and backwash water and regeneration liquid of the defluorination filter are discharged to the backwash liquid storage pool.
3. The coal gasification and fertilizer plant fluorine-containing wastewater treatment system according to claim 2, wherein said system further comprises: and the sludge tank is connected with the backwash liquid storage tank, the backwash water and the regeneration liquid are discharged to the backwash liquid storage tank, and after natural sedimentation, bottom sludge is conveyed to the sludge tank.
4. The coal gasification and fertilizer plant fluorine-containing wastewater treatment system according to claim 3, wherein said system further comprises: and the flocculation and precipitation equipment is connected with the backwash liquid storage tank, the sludge tank and the regulating tank, backwash water and regenerated liquid are discharged to the backwash liquid storage tank, supernatant is conveyed to the flocculation and precipitation equipment after natural precipitation, the supernatant is conveyed to the regulating tank after treatment of the flocculation and precipitation equipment, and bottom sludge is conveyed to the sludge tank.
5. The coal gasification and fertilizer plant fluorine-containing wastewater treatment system according to claim 1, wherein said system comprises: the device comprises a metering pump and a pipeline mixer, wherein the pipeline mixer is used for connecting the regulating tank and the pH value regulating tank, and acid liquor or alkali liquor is added into the pipeline mixer through the metering pump when wastewater enters the pH value regulating tank from the regulating tank.
6. The coal gasification and fertilizer plant fluorine-containing wastewater treatment system according to claim 1, wherein a filter screen and/or quartz sand is arranged at the bottom of the fluorine removal filter, and an activated alumina filler is arranged above the filter screen and/or quartz sand.
7. The coal gasification and fertilizer plant fluorine-containing wastewater treatment system according to claim 1, wherein said system further comprises: and the cache pool is connected with the online detector and the integrated flocculation and precipitation equipment and is used for adsorbing and treating the wastewater through the activated carbon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920852279.4U CN210393987U (en) | 2019-06-06 | 2019-06-06 | Coal gasification and fluoride-containing wastewater treatment system of chemical fertilizer plant |
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| CN201920852279.4U CN210393987U (en) | 2019-06-06 | 2019-06-06 | Coal gasification and fluoride-containing wastewater treatment system of chemical fertilizer plant |
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| CN201920852279.4U Active CN210393987U (en) | 2019-06-06 | 2019-06-06 | Coal gasification and fluoride-containing wastewater treatment system of chemical fertilizer plant |
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2019
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