JP2511755B2 - Liquid chemical injection device for water treatment equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a chlorine treatment agent, a defoaming agent, a pH control agent, and a microorganism in a treatment tank such as a sewage tank, a pH adjusting tank, and an aeration tank of a water treatment device for purifying sewage. The present invention relates to an improvement of an injection device for injecting a drug solution such as a nutrient solution in a drip form.

[0002]

2. Description of the Related Art Means for dripping and injecting a chemical solution into wastewater in a treatment tank of a water treatment apparatus has conventionally been conventionally used.
As shown in FIG. 1, a chemical solution tank 1 is supported by an appropriate supporting member above a treatment tank b in which a liquid to be treated a such as sewage has been filled, and the chemical solution flows out to the bottom thereof. Then, an injection pipe 2 for injecting into the liquid to be treated a in the treatment tank b is connected, and a valve V for adjusting the opening is attached to the injection pipe 2 to control the opening of the valve V. By adjusting the flow of the chemical solution from the injection pipe 2 so as to be dripped in a very small amount in a drip state, or as shown in FIG. A metering pump P for pumping out the medicinal solution is attached to the medicinal solution tank 1 supported above the tank b, and the medicinal solution is treated at the discharge port of the metering pump P.
The injection pipe 2 for flowing out to the liquid to be treated a therein is connected, and by controlling the operation of the metering pump P, the outflow of the chemical liquid from the injection pipe 2 is adjusted so as to be drip-shaped. It is done by that.

Further, by forming the liquid medicine tank 1 in a hermetically sealed container, connecting a ventilation pipe to the upper part of the liquid medicine tank 1, and adjusting the amount of air flowing into the liquid medicine tank 1 made of the hermetically sealed container through the air ventilation pipe, Means for controlling the outflow amount of the drug solution from the injection pipe 2 communicating with the bottom of the drug solution tank 1 is disclosed in Japanese Utility Model Laid-Open No. 47-28.
No. 744 publication.

[0004]

According to the conventional means, in the means shown in FIG. 1, the injection of the liquid medicine from the injection pipe 2 is carried out in a very small amount like a drip. Since the adjustment is performed by adjusting the opening degree of the valve V provided in the pipe 2, the adjusted opening of the valve V becomes a very narrow gap, so that fine dust mixed in the chemical solution or precipitation from the chemical solution is generated. Since the crystal of the chemical liquid component that is present is caught on the opening of the valve V and causes clogging, there is a problem that the stable injection of the chemical liquid cannot be performed.

Further, in the means shown in FIG. 2, since the metering pump P is used, the cost is increased, there is a restriction that a power source is required to drive the metering pump P, and the maintenance is required. There is a problem that becomes extremely troublesome.

Further, in the means disclosed in Japanese Utility Model Laid-Open No. 47-28744, it is difficult to adjust the amount of ventilation to the chemical liquid tank 1 from the ventilation pipe communicating with the upper portion of the chemical liquid tank 1 formed of a closed container. However, there is a problem that it is difficult to adjust and control the amount of ventilation so as to correspond to a predetermined amount of the chemical liquid dropped.

The present invention has been made in order to solve these problems occurring in the conventional means, and the chemical liquid is controlled by controlling the ventilation amount from a ventilation pipe connected to the upper part of the chemical liquid tank which is a closed container. Even though there is fine dust or precipitates in the chemical solution, it is possible to adjust the drop amount of the chemical solution in a drip form in very small amounts, while having a simple configuration that does not use electricity to control the drop amount. It is an object of the present invention to provide a new means for stably performing a drop injection of a drug solution without causing clogging of the injection pipe and the ventilation pipe.

[0008]

SUMMARY OF THE INVENTION The present invention, however, has been completed on the basis of the knowledge obtained through various studies and experiments for the above purpose.

That is, since the conventional means is designed to directly control the outflow amount of the chemical liquid in order to adjust the amount of the chemical liquid dropped from the injection pipe 2, various problems occur. Yes, the chemical solution tank is formed in a closed container, and the outflow of the chemical solution from the injection pipe communicating with the bottom of the chemical solution tank is controlled by the pressure of the air in the chemical solution tank.
An aeration pipe communicating with the outside is connected to the upper part of this chemical solution tank, and a foam collector is connected to the outer end side of the ventilation pipe, and the foam collector is treated in the aeration tank adjacent to the treatment tank. It is inserted into the liquid and a part of the aeration air bubbles blown into the liquid to be treated in the aeration tank is collected by this bubble collector and sent to the chemical liquid tank through the ventilation pipe. The reason for this is that good results were obtained when the ventilation amount of the ventilation pipe was adjusted by the amount of bubbles collected by this foam collector.

From this, in the present invention,
As a means for achieving the above-mentioned object, a chlorine agent, an antifoaming agent, a PH adjusting agent, a microorganism, An injection pipe for dropping a liquid medicine such as a nutrient solution is provided, and the base end side of the injection pipe is connected and communicated with the bottom of a liquid medicine tank consisting of a closed container whose liquid medicine inlet is sealed by an opening / closing lid. Is supported so that its bottom portion is located higher than the tip opening of the injection pipe, and a ventilation pipe for allowing gas to flow into the chemical liquid tank from the outside is connected to the upper end portion side of the chemical liquid tank. A reverse funnel-shaped foam collector is connected to the end side, and this foam collector is blown into the liquid to be treated in the aeration tank adjacent to the treatment tank to capture a part of the aeration air bubbles that swirl and flow. The aeration tube is inserted into the liquid to be treated so that it collects and the amount of bubbles collected by the foam collector Is intended to raise the infusion of the chemical in the water treatment apparatus adapted to control the dropping amount of the chemical liquid from the injection tube to control the amount of aeration.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a chemical injection device for a water treatment device according to the present invention will be described in detail below with reference to the drawings. In addition, the drawing symbols are
The same reference numerals are used for components having the same effect as those of the conventional means.

FIG. 3 is a partially cutaway front view of a chemical injection device of a water treatment apparatus according to the present invention. In the figure, 1 is a chemical tank, 2 is an injection pipe, and b is a liquid to be treated a. A treatment tank of the water treatment apparatus, c is an aeration tank adjacent to the water treatment apparatus, 3 is a ventilation pipe, and d is an adjusting means.

The chemical liquid tank 1 is formed as a hermetically sealed container, and a chemical liquid inlet 10 for pouring the chemical liquid is provided on the upper surface side, but it is sealed by a detachable opening / closing lid 11. There is. Then, the chemical liquid tank 1 is arranged above the processing tank b that requires the dropping and injection of the chemical liquid into the object to be processed, and is supported by an appropriate supporting member.

The injection pipe 2 has a base end side connected and communicated with the lower end side of the chemical liquid tank 1, and a front end side thereof faces above an open port on the upper surface side of the processing tank b. An on-off valve 20 that is manually opened and closed is connected to the middle of the injection pipe 2. The on-off valve 20 prevents the chemical solution existing in the chemical solution tank 1 from flowing out at a time when the opening / closing lid 11 is opened to load the chemical solution into the chemical solution tank 1. It is an on-off valve.

The vent pipe 3 is connected to the upper end side of the chemical liquid tank 1 so that the base end side thereof communicates with the air layer above the liquid level L of the chemical liquid loaded in the chemical liquid tank 1. Reference numeral 30 denotes an on-off valve which is provided at a portion of the ventilation pipe 3 protruding from the chemical liquid tank 1 and which is manually opened and closed.
This open / close valve 30 is also for closing the vent pipe 3 when the chemical liquid is loaded into the chemical liquid tank 1.

The ventilation amount adjusting means d provided in the ventilation pipe 3 is
An aeration funnel-shaped foam collector 4 is connected to the outer end side of the ventilation pipe 3, and the aeration air, such as a contact aeration tank provided adjacent to the treatment tank b, is connected to the foam collector 4. The blower device 5 is introduced to the aeration tank c blown into the object to be treated, and the lower end opening 40 is immersed in the liquid e to be treated in the aeration tank c.
The liquid to be treated e in the aeration tank c, which is pressure-fed by the air-feeding pipe 50 communicating with
By collecting a part of air bubbles 52 for aeration that are blown into the liquid e to be swirled in the liquid e to be treated and sent to the ventilation pipe 3, Bubble 52 ...
The ventilation amount of the ventilation pipe 3 is adjusted by adjusting the collection amount.

In the apparatus of this embodiment, a chemical solution is loaded into the chemical solution tank 1, the chemical solution inlet 10 is sealed with an opening / closing lid 11, and an open / close valve 20 provided in the injection pipe 2 and an open / close valve provided in the ventilation pipe 3 are provided. Thirty
If and are opened, if there is no collection of air bubbles in the foam collector 4, the inside of the chemical solution tank 1 via the ventilation pipe 3 to the foam collector 4 will be in a sealed state, The outflow of the drug solution from the opening of the injection pipe 2 is maintained in a stopped state.

The air bubbles 52 for aeration that are pressure-fed by the air feed pipe 50 connected to the blower device 5 and are blown out from the air diffuser 51 into the liquid e to be treated in the aeration tank c are ... When entering into the inside from the opening 40 at the lower end of the bubble collector 4, the gas flows into the liquid medicine tank 1 from the ventilation pipe 3 by the amount of the bubbles, and the liquid medicine drips from the injection pipe 2 correspondingly. Become.

Therefore, by changing the shape, size, and location of the bubble collector 4 to adjust the amount of trapped air bubbles 52 of the aeration air, the amount of the chemical liquid dropped from the injection pipe 2 can be adjusted. Will be adjusted.

[0020]

As described above, according to the means of the present invention, the amount of the chemical liquid dropped from the injection pipe 2 connected to the chemical liquid tank 1 to the liquid a to be treated in the treatment tank b of the water treatment device is adjusted. In order to control, a part of the flow of the bubbles of the air for aeration sent to the liquid e to be treated in the aeration tank c adjacent to the treatment tank b is collected by the bubble collector 4, and this is collected. Chemical tank 1 via aeration pipe 3
The shape and size of the foam collector 4 are controlled by controlling the amount of bubbles collected by this foam collector so as to control the amount of the drug solution dripped from the injection pipe 2. By adjusting the arrangement position and changing the arrangement position as desired to adjust the amount of trapped air bubbles 52 of the aeration air, the amount of the chemical liquid dropped from the injection pipe 2 can be controlled as desired.

Therefore, the ventilation amount of the ventilation pipe 3 connected to the upper portion of the chemical liquid tank 1 is controlled to control the dripping amount of the chemical liquid from the injection pipe 2, without using electricity, and the maintenance is easy. , Can be obtained with a remarkably simple mechanism.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of conventional means.

FIG. 2 is a partially cutaway front view of another conventional means.

FIG. 3 is a partially cutaway front view of the chemical liquid injector of the water treatment device according to the present invention.

FIG. 4 is a partially cutaway front view of another example.

FIG. 5 is a partially cutaway front view of still another example.

[Explanation of symbols]

a ... liquid to be treated, b ... treatment tank, c ... aeration tank, d ... adjusting means, e ... liquid to be treated, V ... valve, P ... pump, L ... liquid level, 1 ... chemical liquid tank, 10 ... chemical liquid inlet , 11 ... open / close lid, 2 ... injection pipe, 20 ... open / close valve, 3 ... vent pipe, 30 ... open / close valve, 4 ... foam collector, 40 ... open port, 5 ... blower device,
50 ... Air supply pipe, 51 ... Air diffuser, 52 ... Bubbles, 6 ... Orifice.

Claims (1)

(57) [Claims] 1. A chemical liquid such as a chlorine agent, an antifoaming agent, a pH adjusting agent, a microbe, a nutrient, etc. above the upper opening of a treatment tank b such as a sewage tank, a pH adjusting tank, and an aeration tank of a water treatment device. An injection pipe 2 for dripping is provided, and the base end side of the injection pipe 2 is connected and communicated with the bottom of the chemical liquid tank 1 which is a closed container in which the chemical liquid inlet 10 is sealed by an opening / closing lid 11. 1 is supported so that its bottom portion is positioned higher than the tip opening of the injection pipe 2, and a ventilation pipe 3 is connected to the upper end portion side of the chemical liquid tank 1 for allowing gas to flow into the chemical liquid tank 1 from the outside. An inverted funnel-shaped foam collector 4 is connected to the outer end side of the ventilation pipe 3, and the foam collector 4 is swirled and flown by being blown into the liquid e to be treated e in the aeration tank c adjacent to the treatment tank b. The air collected by the bubble collector 4 is inserted into the liquid e to be treated so as to collect a part of the bubbles of the aeration air. A chemical injection device in a water treatment device in which the ventilation amount of the ventilation pipe 3 is controlled by the amount of bubbles to control the dropping amount of the chemical liquid from the injection pipe 2.