JP4514285B2

JP4514285B2 - PH neutralization treatment equipment for alkaline waste liquid

Info

Publication number: JP4514285B2
Application number: JP2000161600A
Authority: JP
Inventors: 達也千賀; 優一若間; 武幸西村
Original assignee: Tsurumi Manufacturing Co Ltd
Current assignee: Tsurumi Manufacturing Co Ltd
Priority date: 2000-05-31
Filing date: 2000-05-31
Publication date: 2010-07-28
Anticipated expiration: 2020-05-31
Also published as: JP2001340877A

Description

【０００１】
【発明の技術分野】
本発明は、ボイラー洗浄やコンクリートミキサ車の洗車作業によって生じるアルカリ性廃液の炭酸ガスを用いたＰＨ中和処理装置に関するものである。
【０００２】
【従来技術とその問題点】
従来この種の処理装置では図２に示すよう、アルカリ性廃液を原水槽１０８内設置の水中ポンプ１０１によるポンプアップ方式で反応槽１０２内へ揚送させるため、原水槽１０８内が低水位状態となれば水中ポンプ１０１による廃液の揚送が不能となり、従って低水位状態での渇水運動とならないよう原水槽１０８の貯溜容積を確保すると共に液面検出器１００による水中ポンプ１０１の発停制御が必要となる。また、反応槽１０２内への流入と槽外への放出は常に連続状態でのみ行わせられ、反応槽１０２内の容量が少なければ十分な中和処理が施されないままで槽外へ放出されることになるため、反応槽１０２の大型化により設置コストが増大する。更にまた、反応槽１０２内の液面上へ浮き上がる未反応の残留炭酸ガスは、廃液の再処理に利用されることなく大気中に排気され、炭酸ガスの無駄な浪費によってランニングコストも増大することになる。
【０００３】
【発明の目的】
本発明の目的は、原液槽の大きさや形状に制約されることなく低水位までポンプ吸引できると共に、反応槽の容量が少なくても有効な中和処理が施され、コンパクトに構成できて設置コストを引き下げ、かつ、炭酸ガスを有効に利用できてその消費量が少なくて済みランニングコストを低減し得る、アルカリ性廃液のＰＨ中和処理装置を提供することにある。
【０００４】
【発明の構成】
本発明に係るアルカリ性廃液のＰＨ中和処理装置においては、反応槽内に収容された水中ポンプの吐出口から吐水管を導延し、炭酸ガスボンベから気化器を介して導延された炭酸ガス送給管を上記吐水管に合流させ、アルカリ性廃液の原水槽から上導された原水吸引管の終端開口部を、上記吐水管の反応槽内に収容された導延先端部に形成されたるエジェクタ内のノズル外周の負圧部へ導通させてエジェクタのスロート部から反応槽内へ噴射するように構成し、反応槽の上面部から後記流出口の開口位置よりも下方まで達するように導下された仕切板により、反応槽内の上方部を上蓋により密閉されたガス溜室と大気中へ開口される通気室とに区画し、該仕切板の下縁よりも上方位置において通気室内から槽外へ導出される流出口を開設し、前記原水吸引管から分岐して導出された管体の導出先端部を液面上のガス溜室内へ開口させて炭酸ガス再吸引路を構成し、更に要すれば、反応槽内の上方部に形成された通気室を上蓋に立設された通気管および開閉バルブによって大気中と開閉自在に構成する。
【０００５】
【実施例】
以下実施例の図１により説明をする。
【０００６】
１は反応槽２内に収容された水中ポンプ、３は水中ポンプ１の吐出口から導延された吐水管であり、その反応槽２内に収容された先端開口部に形成されるエジェクタ９内のノズル外周（図示せず）には負圧部が繞設されている。４は炭酸ガスボンベ５から気化器６を介して導延された炭酸ガス送給管であり、その先端開口部を上記吐水管３に導通させて気液送給路を構成する。７はアルカリ性廃液の原水槽８から上導された原水吸引管であり、その終端開口部を前記ノズル外周の負圧部へ導通させてエジェクタ９のスロート部２１から反応槽２内へ噴射するように構成する。１０は反応槽２の上面部から導下された仕切板であり、その下縁部１０ｅは後記流出口１１の開口位置よりも下方まで達している。そして該仕切板１０により、反応槽２内の上方部は上蓋１２で密閉されたガス溜室１３と大気中へ開口される通気室１４とに区画されている。１１は仕切板１０の下縁１０ｅよりも上方位置において通気室１４内から槽外へ導出される流出口である。上記通気室１４は、上蓋１２に穿設された通気孔（図示せず）によって大気中と導通し、または、上蓋１２上へ立設された通気管１５および開閉バルブ１６によって大気中と開閉自在に導通される。前記原水吸引管７から分岐して上導された管体１７の上導先端部は液面上のガス溜室１３内へ開口させて炭酸ガス再吸引路を構成する。２０は反応槽２内に設置されたＰＨ電極である。
【０００７】
【作用】
水中ポンプ１の駆動により反応槽２内のアルカリ性廃液はポンプ吸込口から吸込まれ吐出口より吐水管３を通過する際に炭酸ガス送給管４からの炭酸ガスを伴い、かつ、吐水管３を経由してエジェクタ９内のノズルを通過する際に負圧部に負圧が発生し、原水吸込管７により原水槽８内のアルカリ性廃液を吸引して気液混合状態でエジェクタ９のスロート部２１から噴射され、撹拌作用によって中和反応される。中和反応された処理水は流出口１１から溢流して槽外へ送出されるが、未反応の残留炭酸ガスは上昇し反応槽２の上面部から流出口１１の開口位置よりも下方まで達するよう導下された仕切板１０により、反応槽２内の上方部を上蓋１２により区画密閉されたガス溜室１３に蓄溜され、管体１７の上導先端部からエジェクタ９により再吸引されてアルカリ性廃液の再処理に利用される。開閉バルブ１６の閉操作によって通気管１５を閉止しておけば、反応槽２内の水中ポンプ１が発生する吐出圧力により、流出口１１から処理液を槽外へ圧送させることができる。
【０００８】
【発明の効果】
本発明に係るアルカリ性廃液のＰＨ中和処理装置によれば、従来のポンプアップ方式と異なり、反応槽内に収容された水中ポンプでエジェクタを作動させて原水槽内のアルカリ性廃液を上記エジェクタの負圧部へ吸引しスロート部から噴射するという方式であるため、原水槽からの廃液流入が途絶えても中和処理が継続でき、反応槽の容量が少なくても十分な中和処理が可能であり、また、原水槽の大きさや形状に制約されることなく超低水位まで吸引できるため、現場の既設槽やドラム缶等の仮設槽でも原水槽として利用でき、かつ、中和処理に必要な主要機能を反応槽内へ集約ユニット化されているため、従来に比し可搬性にも優れている。そしてコンパクトな構成によりローコストに設置でき、また、炭酸ガスの有効利用によりその消費量が少なくなってランニングコストをも低減させることができるという利点がある。
【図面の簡単な説明】
【図１】本発明に係るアルカリ性廃液のＰＨ中和処理装置の構成図である。
【図２】従来のアルカリ性廃液のＰＨ中和処理装置の構成図である。
【符号の説明】
１水中ポンプ
２反応槽
３吐水管
４炭酸ガス送給管
７原水吸引管
８原水槽
９エジェクタ
１０仕切板
１１流出口
１２上蓋
１３ガス溜室
１４通気室
１５通気管
１６開閉バルブ
１７管体
２１スロート部 [0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a PH neutralization treatment apparatus using alkaline waste liquid carbon dioxide gas generated by boiler washing or concrete mixer truck washing.
[0002]
[Prior art and its problems]
Conventionally, in this type of processing apparatus, as shown in FIG. 2, since the alkaline waste liquid is pumped up into the reaction tank 102 by the pump-up method using the submersible pump 101 installed in the raw water tank 108, the inside of the raw water tank 108 becomes a low water level state. Therefore, it is impossible to lift the waste liquid by the submersible pump 101. Therefore, it is necessary to secure the storage volume of the raw water tank 108 and prevent the submersible pump 101 from being started and stopped by the liquid level detector 100 so as not to cause the drought movement at the low water level. Become. Moreover, inflow into the reaction tank 102 and discharge to the outside of the tank are always performed only in a continuous state, and if the capacity in the reaction tank 102 is small, it is discharged outside the tank without being sufficiently neutralized. Therefore, the installation cost increases due to the increase in the size of the reaction vessel 102. Furthermore, the unreacted residual carbon dioxide gas floating above the liquid level in the reaction tank 102 is exhausted to the atmosphere without being used for the reprocessing of the waste liquid, and the running cost increases due to the wasteful waste of carbon dioxide gas. become.
[0003]
OBJECT OF THE INVENTION
The object of the present invention is that the pump can be sucked to a low water level without being restricted by the size and shape of the stock solution tank, and effective neutralization treatment is performed even if the reaction tank capacity is small, and it can be configured compactly and installed cost. It is another object of the present invention to provide a PH neutralization treatment apparatus for alkaline waste liquid that can reduce the running cost by reducing carbon dioxide gas and effectively using carbon dioxide gas and consuming less.
[0004]
[Structure of the invention]
In the alkaline waste liquid PH neutralization treatment apparatus according to the present invention, a carbon dioxide gas feed is introduced from a discharge port of a submersible pump accommodated in a reaction tank and from a carbon dioxide cylinder through a vaporizer. the supply tube is combined with the water discharge pipe, that the end opening of Ueshirube the raw water suction pipe from the raw water tank of alkaline waste liquid formed in Shirubenobe tip housed in the reaction vessel of the water discharge pipe ejector It is configured to be conducted to the negative pressure part on the outer periphery of the nozzle and injected from the throat part of the ejector into the reaction tank, and guided from the upper surface part of the reaction tank to reach below the opening position of the outlet described later. The partition plate partitions the upper part of the reaction tank into a gas reservoir chamber sealed by an upper lid and a vent chamber opened to the atmosphere, and from the vent chamber to the outside of the tank at a position above the lower edge of the partition plate. Establish an outlet that leads to A leading end of the pipe branched off from the raw water suction pipe is opened into the gas reservoir chamber above the liquid level to form a carbon dioxide gas re-suction passage, and if necessary, in the upper part of the reaction tank The formed ventilation chamber is configured to be openable and closable in the atmosphere by a ventilation pipe and an opening / closing valve erected on the upper lid.
[0005]
【Example】
The embodiment will be described below with reference to FIG.
[0006]
1 stowed submersible pump into the reaction vessel 2, 3 is a water discharge pipe which is cast guide from the discharge port of the water pump 1, the reactor contained a distal opening in the formed Ru ejector 9 in the 2 A negative pressure portion is provided on the outer periphery (not shown) of the nozzle. Reference numeral 4 denotes a carbon dioxide gas supply pipe led from the carbon dioxide gas cylinder 5 through the vaporizer 6, and a gas-liquid supply path is formed by connecting the tip opening to the water discharge pipe 3. Reference numeral 7 denotes a raw water suction pipe led from the alkaline waste liquid raw water tank 8 so that the terminal opening is connected to the negative pressure part on the outer periphery of the nozzle and is injected into the reaction tank 2 from the throat part 21 of the ejector 9. It is configured. Reference numeral 10 denotes a partition plate guided from the upper surface portion of the reaction tank 2, and the lower edge portion 10 e reaches below the opening position of the outlet 11 described later. The upper part of the reaction tank 2 is partitioned by the partition plate 10 into a gas reservoir chamber 13 sealed with an upper lid 12 and a vent chamber 14 opened to the atmosphere. Reference numeral 11 denotes an outlet that is led out of the tank from the inside of the ventilation chamber 14 at a position above the lower edge 10e of the partition plate 10. The vent chamber 14 is electrically connected to the atmosphere by a vent hole (not shown) formed in the upper lid 12, or can be opened and closed to the atmosphere by a vent pipe 15 and an opening / closing valve 16 erected on the upper lid 12. Is conducted. The leading end of the pipe 17 branched from the raw water suction pipe 7 is opened into the gas reservoir 13 on the liquid surface to constitute a carbon dioxide gas re-suction passage. Reference numeral 20 denotes a PH electrode installed in the reaction tank 2.
[0007]
[Action]
Alkaline wastewater in the reaction vessel 2 by driving the water pump 1 is associated with a carbon dioxide gas from the carbon dioxide gas feed pipe 4 while passing through the water discharge pipe 3 from being sucked from the pump suction port discharge port, and a water discharge pipe 3 A negative pressure is generated in the negative pressure portion when passing through the nozzle in the ejector 9 via the throat portion 21 of the ejector 9 in a gas-liquid mixed state by sucking the alkaline waste liquid in the raw water tank 8 through the raw water suction pipe 7. And neutralized by stirring action. The treated water subjected to the neutralization reaction overflows from the outlet 11 and is sent out of the tank. However, the unreacted residual carbon dioxide gas rises and reaches from the upper surface of the reaction tank 2 to below the opening position of the outlet 11. By the partition plate 10 thus guided, the upper part in the reaction tank 2 is stored in a gas reservoir chamber 13 partitioned and sealed by the upper lid 12 , and is re-suctioned by the ejector 9 from the leading end part of the tube body 17. Used for reprocessing alkaline waste liquid. If the vent pipe 15 is closed by closing the open / close valve 16, the treatment liquid can be pumped out of the tank from the outlet 11 by the discharge pressure generated by the submersible pump 1 in the reaction tank 2.
[0008]
【The invention's effect】
According to the PH neutralization treatment apparatus for alkaline waste liquid according to the present invention, unlike the conventional pump-up system, the ejector is operated by a submersible pump accommodated in the reaction tank, so that the alkaline waste liquid in the raw water tank is negatively charged by the ejector. Because it is a method of sucking into the pressure part and injecting from the throat part, neutralization can be continued even if the waste liquid inflow from the raw water tank stops, and sufficient neutralization can be performed even if the capacity of the reaction tank is small In addition, since it can be sucked to ultra-low water level without being restricted by the size and shape of the raw water tank, it can be used as a raw water tank in existing tanks and drum tanks, etc. Is integrated into the reaction tank, so it is superior in portability compared to conventional units. And it has the advantage that it can be installed at a low cost by a compact configuration, and the consumption can be reduced and the running cost can be reduced by the effective use of carbon dioxide gas.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a pH neutralization treatment apparatus for alkaline waste liquid according to the present invention.
FIG. 2 is a configuration diagram of a conventional alkaline waste liquid PH neutralization treatment apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Submersible pump 2 Reaction tank 3 Water discharge pipe 4 Carbon dioxide gas supply pipe 7 Raw water suction pipe 8 Raw water tank 9 Ejector 10 Partition plate 11 Outlet 12 Upper cover 13 Gas reservoir room 14 Venting chamber 15 Venting pipe 16 On-off valve 17 Tube
21 Throat

Claims

A water discharge pipe is led from the discharge port of the submersible pump accommodated in the reaction tank, and the carbon dioxide gas supply pipe led from the carbon dioxide gas cylinder through the vaporizer is joined to the water discharge pipe, so that an alkaline waste liquid raw water tank Ueshirube been the terminating opening of the raw water suction pipe from the throat portion of the made conductive to negative pressure ejector nozzle periphery of the ejector Shirubenobe Ru is formed on the tip portion which is accommodated in the reaction vessel of the water discharge pipe adapted to inject into the reaction vessel from the partition plate which is made as guide to reach lower than the opening position of the later outlet from the top of the reaction vessel, the upper portion of the reaction vessel is sealed by the upper lid It is divided into a gas reservoir chamber and a vent chamber that opens to the atmosphere, and an outlet that leads out of the tank from the vent chamber is opened at a position above the lower edge of the partition plate, and branches off from the raw water suction pipe. On the liquid surface Is opened to the gas reservoir chamber, characterized in that it has the carbon dioxide gas re suction path, PH neutralization apparatus alkaline waste.

2. The alkaline waste liquid according to claim 1, wherein a vent chamber formed in an upper portion of the reaction tank is configured to be openable and closable in the atmosphere by a vent pipe and an open / close valve provided upright on an upper lid. PH neutralizer.