CN211255407U - Waste water pH value adjusting device - Google Patents
Waste water pH value adjusting device Download PDFInfo
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- CN211255407U CN211255407U CN201922196870.1U CN201922196870U CN211255407U CN 211255407 U CN211255407 U CN 211255407U CN 201922196870 U CN201922196870 U CN 201922196870U CN 211255407 U CN211255407 U CN 211255407U
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Abstract
The utility model discloses a PH value adjusting device for waste water, which comprises a neutralization treatment device, wherein the inlet of a first water pump of the neutralization treatment device is communicated with the bottom of a neutralization storage tank, the PH value adjusting device also comprises a dilution treatment device, the dilution treatment device comprises a dilution storage tank, a first overflow groove is hoisted in the inner cavity of the dilution storage tank, the outlet of the first water pump is connected with the first overflow groove through a drain pipe, the top of the dilution storage tank is also connected with a dilution water pipe, and the dilution water pipe is provided with a solenoid valve; a PH value detector and a power-off delay relay are arranged on the outer wall of the dilution storage tank, and a probe of the PH value detector is inserted into the first overflow groove; the coil of the power-off delay relay is connected in series with a power supply through a lower limit alarm switch and an upper limit alarm switch which are connected in parallel with the PH value detector, and a first delay disconnection switch of the power-off delay relay controls the electromagnetic valve to be powered on and off. The utility model discloses still dilute processing apparatus through the pH value and handle waste water, further adjust the pH value and the acid-base concentration of waste water.
Description
Technical Field
The utility model relates to a chemical industry equipment technical field especially relates to a waste water pH value adjusting device.
Background
During the production process of the fertilizer, ammonia gas is produced by the reaction of hydrogen and nitrogen, and nitric acid is produced by the reaction of ammonia gas and oxygen.
In the production process, a large amount of waste water is easy to generate, the waste water containing ammonia gas is alkaline, the waste water containing nitric acid is acidic, and the waste water generated in the production process directly enters a subsequent process or is directly discharged into the environment without pH value adjustment, so that health damage is caused to equipment or personnel in the subsequent process, and various organisms in the environment are harmed and killed when the waste water is directly discharged into the environment.
In the prior art, the adjustment of the pH value of wastewater in fertilizer production enterprises is usually achieved by adding strong acid or strong base. The pH value of the wastewater neutralized by strong acid or strong base is monitored and the addition of the strong acid and the strong base is controlled, and the pH value is mostly analyzed by manual sampling at present, so that the addition of the strong acid and the strong base is controlled. The method has large fluctuation of the pH value of the wastewater, can cause the shortage and the excess of strong acid or strong base, further increases the difficulty of wastewater treatment in subsequent procedures, and can also cause the waste of the strong acid and the strong base, thereby increasing the expense of enterprises.
The adjustment fluctuation of the pH value of the wastewater is large, the alkalinity of the overhigh pH value is large, the acidity of the overlow pH value is large, the equipment and the pipeline of the subsequent process are easily corroded, and the leakage is always more or less generated in the subsequent process, so that the personnel in the subsequent process are easily hurt to the health after contacting the wastewater or sucking the steam of the wastewater, particularly ammonia water, nitric acid, hydrochloric acid, phosphoric acid and the like, the higher the concentration is, the more easily the wastewater is volatilized, and the serious harm is often caused to the respiratory system of a human body after the human body sucks the wastewater.
The prior art has the defects that after strong acid or strong base is added into the wastewater for neutralization, the wastewater directly enters the next procedure, the pH value of the wastewater fluctuating up and down is not further regulated, the equipment of the subsequent procedure is easily corroded, and the health of personnel in the subsequent procedure is damaged.
SUMMERY OF THE UTILITY MODEL
In view of at least one defect of prior art, the utility model aims at providing a waste water pH value adjusting device, add strong acid or alkali to waste water and carry out the neutralization back, still handle waste water through diluting processing apparatus, further adjust the pH value and the acid-base concentration of waste water, reduce the corruption to the subsequent handling equipment, reduce the health harm to the subsequent handling personnel.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a PH value adjusting device for waste water comprises a neutralization treatment device, the neutralization treatment device is provided with a neutralization storage tank, the neutralization storage tank is provided with a waste water conveying pipe, an acid adding device, an alkali adding device, a stirring device and a first water pump, an inlet of the first water pump is communicated with the bottom of the neutralization storage tank, the key is that,
the device comprises a dilution storage tank, an annular first overflow groove is hung in the center of the top of an inner cavity of the dilution storage tank, the top of the first overflow groove is open, an outlet of a first water pump is connected with a drain pipe, an outlet of the drain pipe extends into the dilution storage tank and is positioned above the opening of the first overflow groove, the top of the dilution storage tank is also connected with a dilution water pipe, and the dilution water pipe is provided with an electromagnetic valve;
the outer wall of the dilution storage tank is provided with a PH value detector and a power-off delay relay, the PH value detector is connected with a probe, the probe is positioned below an outlet of the drain pipe, the PH value detector is provided with an upper limit alarm switch and a lower limit alarm switch, and the lower limit alarm switch is connected with the upper limit alarm switch in parallel; a coil of the power-off delay relay is connected in series with a power supply through a lower limit alarm switch and an upper limit alarm switch which are connected in parallel, and a first delay disconnection switch of the power-off delay relay controls the electromagnetic valve to be powered on and off;
the bottom of the dilution tank is provided with a discharge port to which a second water pump is connected.
An upper floating ball switch and a lower floating ball switch are arranged in the dilution storage tank, and the lower floating ball switch is lower than the upper floating ball switch; the upper floating ball switch and the lower floating ball switch are connected with the second water pump through a liquid level control circuit to control the switches of the second water pump and the lower floating ball switch.
Through foretell structure setting, at the preliminary treatment stage, waste water duct connection has waste water suction pump, with waste water suction neutralization storage tank, carries out its pH value of assay analysis through artifical sample, if waste water is acidity and is less than the pH value of settlement, then adds the alkali through adding alkali equipment and carries out neutralization, reduces the concentration of sour in the waste water.
On the contrary, if the wastewater is alkaline and is more than the set pH value, strong acid is added through an acid adding device for neutralization, so that the concentration of the alkali in the wastewater is reduced.
The stirring equipment is used for neutralizing and stirring when strong acid or strong alkali is added, and the first water pump is used for inputting the wastewater subjected to neutralization treatment to the subsequent process.
The acid-base concentration of the wastewater treated in the pretreatment stage often fluctuates above and below a set pH value, the alkalinity of an excessively high pH value is high, the acidity of an excessively low pH value is high, corrosion is easily caused to equipment and pipelines of a subsequent process, and personnel in the subsequent process easily cause harm to body health after contacting the wastewater or sucking steam of the wastewater, particularly ammonia water, nitric acid, hydrochloric acid and phosphoric acid are high in concentration and easy to volatilize, and after being sucked by a human body, serious harm is often caused to a respiratory system of the human body.
The first water pump is used for inputting the neutralized wastewater into an annular first overflow trough, the top of the first overflow trough is open, and the outer diameter of the first overflow trough is slightly smaller than the radius of the dilution storage tank.
The probe of the PH value detector is positioned below the outlet of the drain pipe and above the opening of the first overflow groove, so that the probe of the PH value detector can conveniently detect the PH value of the neutralized wastewater. In the prior art, the probe is mostly directly placed into the dilution storage tank for measurement, and because the fluctuation degree of the pH value of the neutralized wastewater is very small, water is often added into the dilution storage tank, the wastewater is added while the water is added, the fluctuation of detection data is easily caused, the frequent on-off of an electromagnetic valve is easily caused, and the equipment is damaged. The probe of the PH value detector directly detects the PH value of the wastewater in the drain pipe, and the fluctuation is small.
Because diluting the storage tank often the volume very big, first overflow launder has two effects, firstly conveniently dilutes the storage tank with the even joining of waste water in, can with the water intensive mixing that dilutes the water pipe and add, dilutes more evenly.
In addition, a via hole is formed in the middle of the first overflow groove, so that a stirring rod of the stirring device can conveniently pass through the via hole.
The water flowing into the dilution water pipe can be tap water which mainly plays a role in diluting and reducing acid-base concentration, and the water is preferably neutral water with the pH value being approximately equal to 7.
The PH value detector is provided with an upper limit alarm switch and a lower limit alarm switch, when the PH value exceeds the set upper limit, the upper limit alarm switch is closed, and when the PH value exceeds the set lower limit, the lower limit alarm switch is closed.
Because the PH value of the wastewater after neutralization treatment is in an up-and-down fluctuation state, an upper limit alarm switch and a lower limit alarm switch are usually in a frequent on-off state, in order to avoid frequent switching of an electromagnetic valve, a power-off delay relay is required to be arranged, when the PH value of the wastewater exceeds an upper limit and a lower limit, a coil of the power-off delay relay is connected with a power supply, a first delay off switch of the power-off delay relay is instantly closed, and if the coil of the power-off delay relay is powered off, the first delay off switch is in delay off, and the electromagnetic valve is controlled to be; the frequent switching of the electromagnetic valve can be avoided, and if the water pump is used for replacing the electromagnetic valve to add water, the frequent starting of the water pump can be avoided.
And the second water pump introduces the diluted wastewater into the next working procedure.
An annular second overflow groove is hung in the center of the top of the inner cavity of the dilution storage tank, the top of the second overflow groove is open, the inner diameter of the second overflow groove is larger than the outer diameter of the first overflow groove, and a dilution water pipe is connected into the second overflow groove.
Through foretell structure setting, dilute the water pipe and insert in the second overflow launder, through the overflow of second overflow launder income dilution storage tank, with the even joining dilution storage tank of adding of water, make the waste water misce bene of the water and the drain pipe inflow that dilutes the water pipe and add.
Dilute the storage tank and be provided with agitating unit, agitating unit is including setting firmly the motor at dilution storage tank top outer wall, and the output shaft of motor has the puddler, and the upper end and the output shaft of puddler link to each other, and the lower extreme of puddler is connected with the impeller after the through-hole that dilutes the storage tank top and set up deeply in the dilution storage tank.
Through the structure, the motor drives the impeller to rotate, so that water added by the dilution water pipe and wastewater flowing into the drain pipe are uniformly mixed.
And overflow holes are formed in the periphery of the outer wall of the first overflow groove.
Through foretell structure setting, when the drain pipe flow is less, dilute the storage tank through the even interpolation of overflow hole with waste water, when the drain pipe flow is great, unnecessary waste water then overflows around the upper portion opening of first overflow launder.
And the dilution water pipe is also provided with a flow regulating valve.
The flow regulating valve is used for regulating the flow of water added into the dilution water pipe. The larger the flow of the dilution water pipe is, the more water is added, and the manual adjustment is carried out by a user according to the requirement.
The utility model provides a waste water pH value adjusting device, after adding strong acid or alkali to waste water and neutralizing, still handle waste water through pH value dilution processing apparatus, further adjust the pH value and the acid-base concentration of waste water, reduce the corruption to the follow-up process equipment, reduce the health harm to the follow-up process personnel.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a control circuit diagram of the solenoid valve;
FIG. 3 is a block diagram of a first isopipe;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a block diagram of a second isopipe;
FIG. 6 is a top view of FIG. 5;
FIG. 7 is a control circuit diagram of the second water pump;
fig. 8 is a structural view of a control circuit of the power door.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-8, a PH adjusting device for wastewater comprises a neutralization treatment device 1, wherein the neutralization treatment device 1 is provided with a neutralization storage tank 11, the neutralization storage tank 11 is provided with a wastewater delivery pipe 12, an acid adding device 13, an alkali adding device 14, a stirring device 15 and a first water pump 16, and an inlet of the first water pump 16 is communicated with the bottom of the neutralization storage tank 1;
the device comprises a dilution treatment device 2, wherein the dilution treatment device 2 comprises a dilution storage tank 21, an annular first overflow groove 22 is hung in the center of the top of an inner cavity of the dilution storage tank 21, the top of the first overflow groove 22 is open, an outlet of a first water pump 16 is connected with a drain pipe 161, an outlet of the drain pipe 161 extends into the dilution storage tank 21 and is positioned above the opening of the first overflow groove 22, the top of the dilution storage tank 21 is also connected with a dilution water pipe 23, and the dilution water pipe 23 is provided with an electromagnetic valve 231;
the top of the dilution storage tank 21 is provided with a drain pipe 161 and a via hole into which the dilution water pipe 23 extends; the through hole is larger than the outer diameters of the drain pipe 161 and the dilution water pipe 23, and ventilation is possible.
A PH value detector 24 and a power-off delay relay 25 are arranged on the outer wall of the dilution storage tank 21, the PH value detector 24 is connected with a probe 241, the probe 24 is positioned below the outlet of the drain pipe 161, the PH value detector 24 is provided with an upper limit alarm switch 243 and a lower limit alarm switch 242, and the lower limit alarm switch 242 and the upper limit alarm switch 243 are connected in parallel; a coil KT1-1 of the power-off delay relay 25 is connected in series with a power supply through a lower limit alarm switch 242 and an upper limit alarm switch 243 which are connected in parallel, and a first delay disconnection switch KT1-2 of the power-off delay relay 25 controls the electromagnetic valve 231 to be powered on and off;
the bottom of the dilution tank 21 is provided with a discharge port to which a second water pump 26 is connected.
The second water pump 26 is used for pumping the diluted wastewater to the next process.
An upper floating ball switch 261 and a lower floating ball switch 262 are arranged in the dilution storage tank 21, and the lower floating ball switch 262 is lower than the upper floating ball switch 261; the upper floating ball switch 261 and the lower floating ball switch 262 are connected with the second water pump 26 through a liquid level control circuit to control the switches.
The dilution storage tank 21 comprises a Q235 carbon structural steel layer 211 on the outer wall and a stainless steel layer 212 on the inner wall, the Q235 carbon structural steel layer 211 plays a role in strengthening and supporting, and the stainless steel layer 212 plays a role in corrosion prevention. The Q235 carbon structural steel layer 211 and the inner wall stainless steel layer 212 are welded together.
Since the volume of the dilution tank 21 is generally large, it is manufactured using the above-described structure, which plays a role of both corrosion prevention and cost reduction.
The delay time of the power-off delay relay 25 can be adjusted, and the delay time can be adjusted according to the requirement. Wherein, the PH value detector 24 adopts a Mike MIK-pH8.0 high-precision industrial online PH detector; the method is widely applied to the continuous monitoring of the PH value or the ORP value and the temperature in solutions of thermal power, chemical fertilizers, metallurgy, environmental protection, pharmacy, biochemistry, food, tap water and the like.
As shown in figure 1, through the above-mentioned structural arrangement, in the pretreatment stage, the wastewater delivery pipe 12 is connected with a wastewater suction pump to pump wastewater into the neutralization tank 11, the top of the neutralization tank 11 is provided with a through hole into which the wastewater delivery pipe 12 is inserted, the pH value of the wastewater is analyzed by manual sampling, if the wastewater is acidic and is less than the set pH value, the wastewater is neutralized by adding strong base through the alkali adding device 14, and the top of the neutralization tank 11 is provided with a through hole into which the delivery pipe 141 of the alkali adding device 14 is inserted, so that the concentration of acid in the wastewater is reduced.
On the contrary, if the wastewater is alkaline and is greater than the set pH value, the strong acid is added through the acid adding device 13 for neutralization, and the top of the neutralization storage tank 11 is provided with a through hole for the delivery pipe 131 of the acid adding device 13 to access, so that the concentration of the alkali in the wastewater is reduced.
The stirring device 15 is used for neutralizing and stirring when strong acid or strong alkali is added, and the first water pump 16 is used for inputting the neutralized wastewater into the subsequent process.
The acid-base concentration of the wastewater treated in the pretreatment stage often fluctuates above and below a set pH value, the alkalinity of an excessively high pH value is high, the acidity of an excessively low pH value is high, corrosion is easily caused to equipment and pipelines of a subsequent process, and personnel in the subsequent process easily cause harm to body health after contacting the wastewater or sucking steam of the wastewater, particularly ammonia water, nitric acid, hydrochloric acid and phosphoric acid are high in concentration and easy to volatilize, and after being sucked by a human body, serious harm is often caused to a respiratory system of the human body.
The first water pump 16 is used for inputting the neutralized wastewater into the annular first overflow trough 22, the top of the first overflow trough 22 is open, the outer diameter of the first overflow trough 22 is slightly smaller than the radius of the dilution tank 21, as shown in fig. 3, the first overflow trough 22 is provided with a suspension arm 221, the lower end of the suspension arm 221 is fixedly connected with the first overflow trough 22, and the upper end of the suspension arm is fixedly connected with the top of the inner cavity of the dilution tank 21.
The height of the edges of the top openings of the first overflow launders 22 is equal. Facilitating the overflow of wastewater from the open-topped rim of the first overflow launder 22.
The probe 241 of the PH detector 24 is mounted on the boom 221.
The probe 241 of the PH detector 24 is located below the outlet of the drain pipe 161 and above the opening of the first overflow tank 22, so that the probe 241 of the PH detector 24 can detect the PH of the neutralized wastewater. In the prior art, the probe 241 is mostly directly placed in the dilution storage tank 21 for measurement, and the frequent on-off of the electromagnetic valve 231 is reduced because the fluctuation of the pH value after neutralization is very small. The probe 241 of the PH detector 24 directly detects the PH of the wastewater in the drain pipe 161, and the fluctuation is small.
The first overflow groove 22 has two functions, one is to facilitate the wastewater to be uniformly added into the dilution storage tank 21, and the dilution is more uniform.
In addition, a via hole is formed in the middle of the first overflow groove 22, so that a stirring rod of the stirring device can conveniently pass through the via hole.
The dilution water pipe 23 can be tap water, mainly for diluting and reducing acid-base concentration, and the water is preferably neutral water with pH value about 7; and drugs which have a neutralization reaction with acid and alkali can be adopted to play a fine adjustment role, the dosing amount is less at the moment, the time delay of the power-off time delay relay 25 is shorter, and the addition of excessive drugs is avoided.
The PH detector 24 is provided with an upper limit alarm switch 243 and a lower limit alarm switch 242, the upper limit alarm switch 243 is closed when the PH value exceeds a set upper limit of the PH value, and the lower limit alarm switch 242 is closed when the PH value exceeds a set lower limit of the PH value.
Because the PH value of the neutralized wastewater is in a vertical fluctuation state, the upper limit alarm switch 243 and the lower limit alarm switch 242 are usually in a frequent on-off state, in order to avoid frequent switching of the electromagnetic valve 231, a power-off delay relay 25 is needed to be arranged, when the PH value of the wastewater exceeds the upper limit and the lower limit, a coil KT1-1 of the power-off delay relay 25 is connected with a power supply, a first delay off switch KT1-2 of the power-off delay relay 25 is instantly closed, and if the coil KT1-1 of the power-off delay relay 25 is powered off, the first delay off switch KT1-2 is in delayed off, so that the electromagnetic valve 231 is controlled to be powered; frequent switching of the solenoid valve 231 can be avoided, and if a water pump is used to replace the solenoid valve 231 to add water, frequent starting of the water pump can be avoided.
An annular second overflow groove 29 is hung in the center of the top of the inner cavity of the dilution storage tank 21, the top of the second overflow groove 29 is open, the inner diameter of the second overflow groove 29 is larger than the outer diameter of the first overflow groove 22, and the dilution water pipe 23 is connected into the second overflow groove 29.
The second overflow groove 29 and the first overflow groove 22 are coaxially provided with respect to the axis of the dilution tank 21, and the second overflow groove 29 is located outside the first overflow groove 22.
The peripheral edges of the top opening of the second overflow groove 29 are equal in height. The height of the top opening is equal to the ground height, so that the wastewater can conveniently overflow from the peripheral edge of the top opening.
The outer wall of the second overflow trough 29 may also be uniformly distributed with some water spray holes to uniformly spray water into the dilution tank 21.
As shown in fig. 5, the second overflow trough 29 is provided with a suspension rod 291, a lower end of the suspension rod 291 is fixedly connected to the second overflow trough 29, and an upper end of the suspension rod 291 is fixedly connected to the top of the inner cavity of the dilution storage tank 21.
Through the above-mentioned structure, the dilution water pipe 23 is connected to the second overflow trough 29, and overflows into the dilution tank 21 through the second overflow trough 29, and water is uniformly added into the dilution tank 21, so that the water added by the dilution water pipe 23 and the wastewater flowing in the drain pipe 161 are uniformly mixed.
The dilution storage tank 21 is provided with a stirring device 27, the stirring device 27 comprises a motor 271 fixedly arranged on the outer wall of the top of the dilution storage tank 21, an output shaft of the motor 271 is connected with a stirring rod 272, the upper end of the stirring rod 272 is connected with the output shaft, and the lower end of the stirring rod 272 penetrates into the dilution storage tank 21 through a through hole formed in the top of the dilution storage tank 21 and is connected with a impeller 273.
Through the above-mentioned structure, the motor 271 drives the impeller 273 to rotate, so that the water added by the dilution water pipe 23 and the wastewater flowing into the drain pipe 161 are uniformly mixed.
As shown in FIG. 2, the power-off delay relay 25 is provided with a second delay disconnecting switch KT1-3, and the second delay disconnecting switch KT1-3 can control the motor 271 to be powered off in a delayed manner. The working principle is the same as that of the first time-delay disconnection switch KT1-2 control electromagnetic valve 231.
At least one circle of overflow holes 222 are further formed in the periphery of the outer wall of the first overflow groove 22, and when the waste water is less, the waste water can be conveniently and uniformly added into the dilution storage tank 21 through the overflow holes 222.
Wherein the overflow aperture 222 is near the bottom of the first overflow launder 22.
The dilution water pipe 23 is also provided with a flow regulating valve 28.
As shown in fig. 1, the flow rate adjustment valve 28 is provided in front of the solenoid valve 231.
As shown in fig. 1, a water level detection device is arranged in the dilution tank 21, and the water level detection device comprises an upper float switch 261 and a lower float switch 262 which are arranged in the dilution tank 21, wherein the lower float switch 262 is lower than the upper float switch 261; the upper floating ball switch 261 and the lower floating ball switch 262 are connected with the second water pump 26 through a liquid level control circuit to control the switches.
The liquid level control circuit is either a PLC control circuit, a combinational logic circuit or a hysteresis comparator circuit, and the hysteresis comparator circuit is preferably used in the application.
The hysteresis comparator circuit comprises a resistor R26, one end of a normally open switch of the upper floating ball switch 261 is connected with a power supply through a resistor R26, the other end of the normally open switch of the upper floating ball switch 261 is grounded through a resistor R25, one end of the normally open switch of the lower floating ball switch 262 is connected with the power supply through a resistor R27, and the other end of the normally open switch of the lower floating ball switch 262 is connected with the other end of the normally open switch of the upper floating ball switch 261; the other end of the normally open switch of the floating ball switch 261 is also connected with the inverting input end of the hysteresis comparator;
the non-inverting input end of the hysteresis comparator is connected with a reference circuit, the output end of the hysteresis comparator is connected with the base electrode of a switching triode Q21, the switching triode Q21 controls a coil J2-1 of the contactor to be powered on and powered off, and a normally open switch J2-2 of the contactor controls the second water pump to be powered on and powered off. The reference circuit is used for generating a reference voltage.
The hysteresis comparator is provided with two positive return difference voltages, namely a lower threshold voltage and an upper threshold voltage;
through the structural arrangement, when the water level in the dilution storage tank 21 rises from a position lower than the lower floating ball switch 262, the normally open switches of the lower floating ball switch 262 and the upper floating ball switch 261 are both turned off because of sinking;
the voltage of the inverting input end of the hysteresis comparator is lower than the lower threshold voltage, the output end of the hysteresis comparator outputs positive voltage, the switching triode Q21 is conducted to control the coil J2-1 of the contactor to be powered on, and the normally closed switch J2-2 of the contactor is switched off to control the second water pump 26 to be powered off.
When the water level in the dilution storage tank 21 is higher than the lower floating ball switch 262 and lower than the upper floating ball switch 261, the normally open switch of the lower floating ball switch 262 is closed, and the normally open switch of the upper floating ball switch 261 is opened;
the voltage of the inverting input end of the hysteresis comparator is higher than the lower threshold voltage and lower than the upper threshold voltage, the output end of the hysteresis comparator outputs positive voltage, the switching triode Q21 is conducted to control the coil J2-1 of the contactor to be powered on, and the normally closed switch J2-2 of the contactor is disconnected to control the second water pump 26 to be powered off.
When the water level in the dilution storage tank 21 is higher than the upper floating ball switch 261, the normally open switch of the lower floating ball switch 262 is closed, and the normally open switch of the upper floating ball switch 261 is closed;
the voltage of the inverting input end of the hysteresis comparator is higher than the upper threshold voltage, the output end of the hysteresis comparator outputs negative voltage, the switching triode Q21 is cut off, the coil J2-1 of the contactor is controlled to be powered off, and the normally closed switch J2-2 of the contactor is closed to control the second water pump 26 to be powered on.
Conversely, when the water in the dilution tank 21 is sucked away, the water level drops from the position of the float ball switch 261;
when the water level in the dilution storage tank 21 is higher than the lower floating ball switch 262 and lower than the upper floating ball switch 261, the normally open switch of the lower floating ball switch 262 is closed, and the normally open switch of the upper floating ball switch 261 is opened;
the voltage of the inverting input end of the hysteresis comparator is higher than the lower threshold voltage and lower than the upper threshold voltage, the output end of the hysteresis comparator outputs negative voltage, the switch triode Q21 is cut off, the coil J2-1 of the contactor is controlled to be powered off, and the normally closed switch J2-2 of the contactor is closed to control the second water pump 26 to be powered on.
When the water level in the dilution storage tank 21 is lowered to the position of the lower float switch 262, the normally open switches of the lower float switch 262 and the upper float switch 261 are both turned off because the lower float switch 262 and the upper float switch 261 sink;
the voltage of the inverting input end of the hysteresis comparator is lower than the lower threshold voltage, the output end of the hysteresis comparator outputs positive voltage, the switching triode Q21 is conducted to control the coil J2-1 of the contactor to be powered on, and the normally closed switch J2-2 of the contactor is switched off to control the second water pump 26 to be powered off.
The above process is repeated, and the water level line of the dilution tank 21 moves back and forth between the lower float switch 262 and the upper float switch 261. The liquid level control circuit can automatically control the second water pump 26 to pump water, and manual control of the second water pump 26 to be switched on and off according to the position of the liquid level is not needed.
After the neutralization treatment and the dilution treatment, the acid and alkali concentration in the wastewater is quite low, the wastewater is generally not required to be treated, and the wastewater is input into the subsequent working procedures.
The top of the dilution storage tank 21 is also provided with a maintenance inlet 32, the maintenance inlet 32 is provided with an electric door 33, the top of the dilution storage tank 21 is also provided with a fan 34, an outlet of the fan 34 extends into the dilution storage tank 21, the fan 34 is provided with a power switch SB, the dilution storage tank further comprises an electrifying delay relay 35, a coil of the electrifying delay relay 35 is connected with a power supply through the power switch SB, and the electric door 33 is connected with the power supply through a normally open switch of the electrifying delay relay 35;
a maintenance ladder 36 is arranged below the maintenance inlet 32, and the maintenance ladder 36 is fixedly arranged on the side wall of the inner cavity of the dilution storage tank 21;
the bottom of the side wall of the dilution storage tank 21 is also provided with a cleaning opening 3, and the cleaning opening 3 is provided with a sealing door 31.
To facilitate cleaning of the service dilution tank 21, the top of the dilution tank 21 is also provided with a service inlet 32.
Will deposit a large amount of harmful gas in diluting storage tank 21 sometimes, the people in the chemical industry field generally know, it is very dangerous to get into the dilution storage tank 21 that has harmful gas, harmful gas can cause the maintenance personal to faint suddenly, therefore, set up fan 34 at the top of diluting storage tank 21, when getting into maintenance entry 32, open switch SB, fan 34 circular telegram is ventilated to diluting storage tank 21, circular telegram delay relay 35 time delay period back, its normally open switch just time delay is closed, electrically operated gate 33 just can be opened, maintenance personal just can get into through maintenance entry 32 and dilute in the storage tank 21, and is safer.
An illumination lamp may also be provided in the dilution tank 21.
The bottom of the dilution tank 21 deposits a large amount of sediment for a long time, and the sediment can be discharged from the cleaning port 3 by opening the sealing door 31.
Of course, the neutralization tank 11 may be provided with the same maintenance structure as described above for easy maintenance.
Finally, it is noted that: the above list is only the concrete implementation example of the present invention, and of course those skilled in the art can make modifications and variations to the present invention, and if these modifications and variations fall within the scope of the claims of the present invention and their equivalent technology, they should be considered as the protection scope of the present invention.
Claims (7)
1. A PH value adjusting device for waste water comprises a neutralization treatment device (1), wherein the neutralization treatment device (1) is provided with a neutralization storage tank (11), the neutralization storage tank (11) is provided with a waste water conveying pipe (12), an acid adding device (13), an alkali adding device (14), a stirring device (15) and a first water pump (16), an inlet of the first water pump (16) is communicated with the bottom of the neutralization storage tank (11), and the PH value adjusting device is characterized in that,
the device comprises a dilution storage tank (21), the dilution storage tank (21) comprises a Q235 carbon structural steel layer (211) on the outer wall and a stainless steel layer (212) on the inner wall, an annular first overflow groove (22) is hung in the center of the top of an inner cavity of the dilution storage tank (21), the top of the first overflow groove (22) is open, an outlet of a first water pump (16) is connected with a drain pipe (161), an outlet of the drain pipe (161) extends into the dilution storage tank (21) and is positioned above the opening of the first overflow groove (22), the top of the dilution storage tank (21) is also connected with a dilution water pipe (23), and the dilution water pipe (23) is provided with an electromagnetic valve (231);
a PH value detector (24) and a power-off delay relay (25) are arranged on the outer wall of the dilution storage tank (21), the PH value detector (24) is connected with a probe (241), the probe (241) is positioned below an outlet of the drain pipe (161), and the PH value detector (24) is provided with an upper limit alarm switch (243) and a lower limit alarm switch (242); a coil of the power-off delay relay (25) is connected in series with a power supply through a lower limit alarm switch (242) and an upper limit alarm switch (243) which are connected in parallel, and a first delay disconnection switch of the power-off delay relay (25) controls the electromagnetic valve (231) to be switched on and off;
the bottom of the dilution tank (21) is provided with a discharge port to which a second water pump (26) is connected.
2. The apparatus for PH adjustment of wastewater as claimed in claim 1, wherein: the top of the dilution storage tank (21) is also provided with a maintenance inlet (32), the maintenance inlet (32) is provided with an electric door (33), the top of the dilution storage tank (21) is also provided with a fan (34), an outlet of the fan (34) extends into the dilution storage tank (21), the fan (34) is provided with a power switch, the dilution storage tank further comprises a power-on delay relay (35), a coil of the power-on delay relay (35) is connected with a power supply through the power switch, and the electric door (33) is connected with the power supply through a normally open switch of the power-on delay relay (35);
a maintenance ladder (36) is arranged below the maintenance inlet (32), and the maintenance ladder (36) is fixedly arranged on the side wall of the inner cavity of the dilution storage tank (21);
the bottom of the side wall of the dilution storage tank (21) is also provided with a cleaning opening (3), and the cleaning opening (3) is provided with a sealing door (31).
3. The apparatus for PH adjustment of wastewater as claimed in claim 1, wherein: and overflow holes (222) are also formed in the periphery of the outer wall of the first overflow groove (22).
4. The apparatus for PH adjustment of wastewater as claimed in claim 1, wherein: an upper floating ball switch (261) and a lower floating ball switch (262) are arranged in the dilution storage tank (21), and the lower floating ball switch (262) is lower than the upper floating ball switch (261); the upper float ball switch (261) and the lower float ball switch (262) are connected with the second water pump (26) through a liquid level control circuit to control the switches.
5. The apparatus for PH adjustment of wastewater as claimed in claim 1, wherein: an annular second overflow groove (29) is hung in the center of the top of an inner cavity of the dilution storage tank (21), the top of the second overflow groove (29) is open, the inner diameter of the second overflow groove (29) is larger than the outer diameter of the first overflow groove (22), and the dilution water pipe (23) is connected into the second overflow groove (29).
6. The apparatus for PH adjustment of wastewater as claimed in claim 1, wherein: dilute storage tank (21) and be provided with agitating unit (27), agitating unit (27) are including setting firmly motor (271) at dilute storage tank (21) top outer wall, and the output shaft of motor (271) is connected with puddler (272), and the upper end and the output shaft of puddler (272) link to each other, and the lower extreme of puddler (272) is after the through-hole that dilutes storage tank (21) top was seted up deepened and is diluted storage tank (21) and be connected with impeller (273).
7. The apparatus for PH adjustment of wastewater as claimed in claim 1, wherein: the dilution water pipe (23) is also provided with a flow regulating valve (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922196870.1U CN211255407U (en) | 2019-12-10 | 2019-12-10 | Waste water pH value adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922196870.1U CN211255407U (en) | 2019-12-10 | 2019-12-10 | Waste water pH value adjusting device |
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| Publication Number | Publication Date |
|---|---|
| CN211255407U true CN211255407U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922196870.1U Active CN211255407U (en) | 2019-12-10 | 2019-12-10 | Waste water pH value adjusting device |
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| Country | Link |
|---|---|
| CN (1) | CN211255407U (en) |
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