JP3118487U - pH neutralizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pH neutralizer capable of discharging alkaline waste water generated when washing a raw concrete production apparatus or the like by neutralizing with an apparatus having a simple structure and adjusting it to a discharge regulation value.
SOLUTION: It comprises a supply path 2, a chemical tank 3, a neutralization tank 4, a recording tank 5, a chemical pump 6, a neutralization tank pH sensor 7, and a recording tank pH sensor 8. The pH sensor 7 of the neutralization tank 4 is used for neutral adjustment, and the pH sensor 8 of the recording tank 5 is used for discharge monitoring. Ultrasonic transmission type washing machines 14 and 15 are attached to the pH sensor 7 of the neutralization tank 4 and the pH sensor 8 of the recording tank 5.
[Selection] Figure 1

Description

  The present invention relates to an improvement of a pH neutralization device that neutralizes a strong alkaline wastewater generated when washing ready-mixed concrete attached to a production device of a ready-mixed concrete factory, for example, by adjusting it to a discharge regulation value. .

  Conventionally, in the case of wastewater treatment of production equipment in a ready-mixed concrete factory, rainwater drainage treatment in a general factory, or treatment of strong alkaline spring water at a civil engineering work site, a neutralizing agent is mixed to control the pH value (5. 8 to 8.6), it is obliged to discharge the liquid after processing it into a harmless liquid. For example, a pH neutralizing device for a flow sheet as shown in FIG. 2 is provided.

The pH neutralizer 31 includes a supply path 33 to which raw water 32 is supplied, a chemical liquid storage tank 35 in which a chemical liquid 34 is stored, a chemical liquid pump 36 that supplies the chemical liquid 34, and raw water 32 and chemical liquid from the supply path 33. A mixer 37 that forcibly mixes and neutralizes the chemical solution 34 from the pump 36, a discharge recording tank 38 that stores neutralized water from the mixer 37, and neutralized water stored in the discharge recording tank 38. There is known a neutralization device 31 that includes a pH detector 39 for detecting the pH of the discharge and a discharge channel 40 for discharging the neutralized water of the discharge recording tank 38 (for example, Patent Document 1).
Registered Utility Model No. 3049252

  However, the pH neutralization device 31 of Patent Document 1 is a line agitation in which a mixer 37 that forcibly mixes and neutralizes the raw water 32 and the chemical solution 34 is disposed in the pipe. Even though there is an advantage that the space can be reduced, the mixer 37 is hermetically sealed and the inside is complicated by a plurality of mixing chambers 37a, 37a, ... 37a, and the pH value of the neutralized water pushed out from below is It will not be detected in the mixing chamber, but will be detected by the pH detector 39 of the discharge recording tank 38, and the pH value of the discharge value will not be detected at the upper and lower limits, and it may be discharged outside the regulation value. was there.

  The present invention has been researched and developed to solve the above problems, and with a simple structure device, the pH value of the wastewater to be treated can be lowered to the regulated value, and the fluctuation of the discharge pH value can be reduced. It is an object of the present invention to provide a pH neutralizing device that can discharge reliably while complying with the discharge regulation value and can detect abnormalities in the discharged water quality.

  As means for solving the above problems and achieving the object, the present invention includes a supply path to which raw water is supplied, a chemical tank in which the chemical liquid is stored, a chemical pump for supplying the chemical liquid in the chemical tank, and a supply path. Detects the pH value of the neutralization tank to which the raw water and chemical liquid from the chemical pump are supplied, the stirrer for stirring the raw water and the chemical liquid, the recording tank for storing the neutralized water, and the neutralization tank and the recording tank Equipped with a pH sensor with an ultrasonic transmitter that cleans, a discharge switching valve that sends to the discharge side or return side by a signal from the pH sensor of the recording tank, and a CT-type multi-function ammeter in the control panel A pH neutralizer was developed and adopted.

  In the pH neutralization device configured as described above, a pH neutralization device provided with a touch panel and a paperless recorder on the surface of the control panel, and a pH neutralization device equipped with a wireless modem in the control panel were developed and adopted. .

  The supply path to which the raw water is supplied has one end in a sedimentation tank that temporarily stores wastewater discharged from the batcher plant of the ready-mixed concrete factory and wastewater after washing the tank of the concrete mixer truck. Pump and supply to neutralization tank. These wastewaters contain gravel, and if the gravel enters the device, it can cause a failure, so the gravel is sufficiently settled and only alkaline raw water is supplied. The level of raw water is controlled by a level sensor.

  The chemical tank contains sulfuric acid and hydrochloric acid as a chemical for the neutralizer, and includes a chemical pump that pumps the chemical and supplies it to the neutralization layer, and is equipped with a level sensor that detects the level of the chemical.

  The neutralization tank is an upwardly open tank, and is supplied with raw water from the supply path and chemical liquid from the chemical liquid tank. It is equipped with a stirrer that mixes and stirs the raw water and chemical solution, and is equipped with a pH sensor dedicated to pH adjustment with an ultrasonic transmission type washer. The state of is maintained.

  The recording tank is adjacent to the neutralization tank, a recording chamber provided with a pH sensor for pH monitoring and recording with an introduction chamber into which neutralized water is introduced, and a lower part communicating with the introduction chamber and an ultrasonic transmission type washer. It is divided into rooms. In addition, a discharge switching valve is attached to the discharge pipe connected to the recording tank, and if it is a regulation value, normal discharge is performed, and when the water quality is abnormal, the apparatus is returned to the sedimentation tank for reprocessing without stopping the device. Can do.

  The control panel used in the present invention is equipped with a CT type multi-function ammeter, which can manage the status of overcurrent protection, undercurrent protection, deficient operation protection, reverse phase protection, lock rotor protection, and stall protection. Repairs can be made accurately and quickly. In addition, there are touch panels that show precipitation tanks, chemical tanks, neutralization tanks, recording tank volume, pH status display, pump, motor unit display, valve status display, and operating status display, and recording electronic media instead of paper. A paperless recorder that records data and a wireless modem are provided so that abnormalities can be communicated.

  In the present invention, pH sensors are provided in the neutralization tank and the recording tank, the pH sensor of the neutralization tank is dedicated to adjustment, and the pH sensor of the recording tank is dedicated to monitoring and recording the discharge pH value. Fluctuations can be reduced, discharges can be made with strict adherence to regulated discharge values, and abnormalities in discharged water quality can be detected. In addition, since the ultrasonic sensor is attached to the pH sensor, the detection sensitivity does not adhere to the detection unit and the detection sensitivity is improved over a long period of time.

  In addition, since the discharge switching valve is provided in the discharge pipe connected to the recording tank, if an abnormal signal is output to the pH sensor, the abnormal water quality is returned to the sedimentation tank without stopping the device, and then restarted. The treatment can be performed, and the discharge is not performed while the pH value remains high.

  In addition, since a CT-type multi-function ammeter is installed in the control panel, it is possible to identify the cause of trips, overcurrent, lock rotor, stall, deficiency, reverse phase, undercurrent, unbalanced current, etc. Can be done accurately and quickly.

  In addition, since the control panel is provided with a touch panel, details of the operation status are displayed so that the operator can know the status of the apparatus at a glance, and since a paperless recorder is provided, there is no omission of recording due to running out of paper. It can be transmitted to a personal computer and stored, and centralized management is possible. Furthermore, since there is a wireless modem in the control panel, an abnormal signal can be received by telephone or mobile phone even when the manager of the apparatus is not nearby at the time of abnormality, and remote monitoring becomes possible.

  Hereinafter, the embodiment of the present invention will be described with reference to the flow sheet of FIG. 1. The pH neutralizing apparatus 1 of the present invention can be roughly divided into a supply path 2 for supplying raw water A, a chemical tank 3, , A neutralization tank 4, a recording tank 5, a chemical pump 6, and pH sensors 7 and 8.

  The supply channel 2 has one end placed in a sedimentation tank 9 for temporarily storing strong alkaline waste water discharged from the batcher plant of the ready-mixed concrete factory, and the other end is faced above the neutralization tank 4. The raw water A is pumped up by the submersible pump 10 and supplied to the neutralization tank 4. 11 is a level sensor of the sedimentation tank 9, which detects the level of the raw water A so as to store a certain amount.

  On the other hand, sulfuric acid B is accommodated in the chemical tank 3 and pumped up by the chemical pump 6 and supplied to the neutralization tank 4 through the feed pipe 12. Reference numeral 13 denotes a stirrer, in which raw water A and sulfuric acid B are sufficiently mixed and stirred for neutralization, and a pH value is detected by an adjustment pH sensor 7 to which an ultrasonic transmission type washing machine 14 is added.

  The recording tank 5 is divided into an introduction chamber 5a and a recording chamber 5b, but communicates at the lower part, and a pH sensor 8 for monitoring the discharge is provided in the recording chamber 5b. This pH sensor 8 is also provided with an ultrasonic transmission type washing machine 15 to detect the pH value for discharge.

  Reference numeral 16 denotes a discharge switching valve provided in the discharge pipe 17 connected to the recording tank 5. If the pH value is within the regulation value, normal discharge is performed via the discharge pipe 18, but the apparatus is stopped when a water quality abnormality is detected. Without causing the abnormal water to return to the sedimentation tank 9 through the pipe 19, reprocessing is performed.

  20 is a control panel, and a CT-type multi-function ammeter 21 is provided in the upper part of the front, managing the status of overcurrent protection, undercurrent protection, deficient operation protection, reverse phase protection, lock rotor protection, and stall protection. At the same time, it is possible to identify the cause of the trip described above, and to repair the equipment accurately and promptly.

  22 is a touch panel provided on the front part of the control panel 20, a precipitation tank, a chemical tank, a neutralization tank, a liquid volume of a recording tank, a pH status display, a pump, a motor status display, a valve status display, and an operation status. The display etc. are shown, and the status of the device is easy to understand.

  Reference numeral 23 denotes a paperless recorder provided at the lower part of the touch panel, which records the recording on an electronic medium with paper. If there is a notebook personal computer or the like, the data can be stored by directly connecting a cable. In addition, data cannot be altered at all.

  Reference numeral 24 denotes a wireless modem built in the control panel 20, which individually transmits the contents of the abnormality when an abnormality occurs. As a form of transmission, it is transmitted by e-mail to a mobile phone or a personal computer, or a voice call is directly made to the telephone.

  The usage state of the pH neutralizing apparatus configured as described above will be described together with the action and effect. One end of the supply path 2 is put into the sedimentation tank 9 and the raw water A is pumped up by the submersible pump 10 and supplied to the neutralization tank 4. . On the other hand, sulfuric acid B in the chemical liquid tank 3 is injected into the neutralization tank 4 through the feed pipe 12 by the chemical liquid pump 6 and mixed and stirred by the agitator 13 with the raw water contained in the neutralization layer to cause a neutralization reaction. The pH value is adjusted to a neutral range, and the value can be confirmed by the pH sensor 7.

  The neutralized water neutralized in the neutralization tank 4 is introduced into the introduction chamber 5a of the adjacent recording tank 5, then transferred to the recording chamber 5b, and detected by the monitoring pH sensor 8 for the discharge pH value. When the regulation value 5.8 to 8.6 is confirmed by the pH sensor 8, it is discharged from the discharge pipe 17. Thereby, the fluctuation | variation of discharge | release pH value can be reduced and abnormality of discharge | released water quality can be detected.

  The pH sensors 7 and 8 of the neutralization tank 4 and the recording tank are provided with ultrasonic transmission type washing machines 14 and 15, and a lime film adheres to the detection part within a few days in a conventional pH sensor without a washing machine. However, the sensitivity is lowered and the pH value is adversely affected. However, such a situation disappears, and the detection unit can maintain good sensitivity for a long time.

  Since a discharge pipe 17 is connected to the recording tank 5 and a discharge switching valve 16 is provided in the middle of the recording tank 5, if a processing failure occurs due to a change in water quality or a malfunction of the equipment, the abnormal water is returned to the sedimentation tank 9. Can be reprocessed and the device does not need to be stopped.

  In addition, since the control panel 20 is equipped with a CT-type multi-function ammeter, it can be specified if there is an overcurrent, lock rotor, stall, deficiency, reverse phase, undercurrent, or unbalanced current caused by a trip. Repair can be performed quickly and accurately.

  As mentioned above, although main embodiment of this invention was described, this invention is not limited to said embodiment, For example, if the precipitation substance is not mixed in the wastewater to process, it will settle. It is not necessary to use a tank, and sometimes a raw water tank is used. In addition, it is possible to use a chemical solution other than sulfuric acid. In short, the object of the present invention can be achieved, and various design changes can be made without departing from the scope of the invention.

  The present invention can be used as a wastewater treatment device for wastewater discharged from a batcher plant of a ready-mixed concrete plant, as a treatment device for rainwater drainage at a general plant, or as a treatment device for strong alkaline spring water at a civil engineering work site. is there.

It is a flow sheet of the pH neutralization device of the present invention. It is a flow sheet of a conventional pH neutralizer.

Explanation of symbols

1 pH neutralizer 2 Supply path 3 Chemical tank
4 Neutralization tank 5 Recording tank 6 Chemical pump 7 pH sensor 8 pH sensor 13 Stirrer 14 Ultrasonic transmission type washer 15 Ultrasonic transmission type washer 16 Discharge switching valve 20 Control panel 21 CT type multi-function ammeter 22 Touch panel 23 Paperless recorder 24 Wireless modem A Raw water B Chemical solution

Claims (3)

A supply path for supplying raw water, a chemical tank for storing chemical liquid, a chemical pump for supplying chemical liquid in the chemical tank, a neutralization tank for supplying raw water from the supply path and chemical liquid pump, and raw water From a stirrer that stirs the liquid and the chemical solution, a recording tank that stores neutralized water, a pH sensor with an ultrasonic transmission type washing machine that detects pH values of the neutralizing tank and the recording tank, and a pH sensor from the recording tank A pH neutralizing apparatus comprising a discharge switching valve that sends a signal to the discharge side or the return side, and a CT type multi-function ammeter on the control panel. 2. The pH neutralizing apparatus according to claim 1, wherein a touch panel and a paperless recorder are provided on the surface of the control panel. The pH neutralizing apparatus according to claim 1 or 2, wherein a wireless modem is provided in the control panel.