JPS6087838A - Solid liquid mixing equipment - Google Patents

Abstract

PURPOSE:To increase sharply a processing capacity of a titled equipment by reutilizing air used for a quantitative transfer under pressure by a pneumatic system, and press-ejecting powdered granules from a nozzle to liquid being transferred on the way on a closed piping to add said granules thereto. CONSTITUTION:Powdered granules are taken out from a service tank 2 by a feeder 3 and is quantitatively supplied to an ejector 5 using for a pneumatic transfer. Air using for transfer is ejected into the ejector 5 in the inside of a pneumatic transfer pipe 4 via a dehumidifier, header and pressure adjusting valve by a compressor 6. The powdered granules mixed with the air are ejected into sludge from an addition nozzle 9 for the sludge by the shortest route. The air mixed with the powdered granules ejected into the sludge is passed under pressure through a turbulent flow generator 13 in a mixing part 12 arranged close behind an ejector part 11 and is mixed uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION This device is used for adding and mixing powder and granules, which are the core of a sludge dewatering plant, to sludge, or as other solid-liquid mixing devices.

Conventional technology In sludge dewatering plants, equipment for continuously adding and mixing powder and granules to the sludge portion is already generally known, but the conventional equipment is a V-type mixing and stirring tank as shown in Figure 7. 50
The sludge drawn out from the sludge tank 51 by the pump 52 and the granular material from the granular material supply device 53 are put into it and stirred by the agitator 54. The footrest is further pulled out by the pump 55 and sent to the separation +456. Therefore, such conventional equipment requires two pumps, one for drawing out the sludge and one for drawing out the mixture, and since the stirring tank is a rotating type, a powder layer tends to form, and when used continuously, complicated water level control is required. However, there are disadvantages such as the installation area of the entire device is large.

Purpose of the Invention This invention addresses the drawbacks of tj19, and its purpose is to carry out a series of steps from supplying, transporting, adding and mixing powder and granules to final treatment in a closed line, and
The purpose of this method is to transport powder and granules under pressure by pneumatic transportation, use the air to inject them into pipes, and instantaneously mix them due to the turbulent flow generation effect, thereby greatly increasing processing capacity. Further, the purpose of Kc2 is to reduce the number of pumps required by one, reduce the number of mechanically moving parts, and make the entire device compact to increase economic efficiency.

Therefore, in the present invention, there is provided a powder and granular material supplying device equipped with a stationary feeder, etc., and a powder and granular material supplied from the body feeding device is placed in a sealed pipe by an ejector action of pressurized air attached to this feeding device. The pneumatic transport device that pumps the powder to
A liquid and powder addition device is installed immediately after this addition device to mix the liquid and the powder.

A turbulence generator is installed in the mixing section located immediately after the addition device. Moreover, the pneumatic transport device for pumping the powder or granular material may be one or more pneumatic transport devices installed in series.

Example The drawings will be explained below.

Figure 1 shows a system diagram of the sludge dewatering plant equipment.

In the figure, a powder supply device 1 feeds powder into a fixed-rate feeder closed transport pipe 4 consisting of a screw or the like at the bottom of a service tank 2. The transport pipe 4 is equipped with an ejector 5, and the end of the pipe is connected to a compressor 6 to forcefully send pressurized air, thereby causing a shejector action to draw out the powder and force it to be forced forward in the pipe. .

The addition device 7 is provided with a nozzle 9 in a sealed jacket 8, and has a nozzle 9 inside the jacket 8f1. A sludge inlet 10 is provided, and a nozzle 9 is attached to the tip of the transport pipe 4, from which powder and granules are injected under pressure together with air. This injection from the nozzle 9 further generates an ejector action in the ejector section 11 around the nozzle, and powder and granules are added to the sludge being pumped through the ejector section 11.

The mixing section 12 is directly connected immediately after this addition device g'17,
A turbulence generator 13 is provided therein. Even if a turbulence generator is not installed, a strong turbulence effect can be obtained simply by injecting air into the sludge, but it is necessary to add the effect of turbulence generation t) or R1; This will help reduce the amount of air used and reduce power consumption.

This turbulence generator 13 may be one having spiral wave-shaped grooves 13a on the inner wall of a hollow tube as shown in FIG. 5, or one having blades 13b for agitation and dispersion as shown in FIG. It will be done.

The sludge is drawn out from the storage tank 15 by the pump 14.

12, through which sludge that has been strongly mixed and agitated with powder is introduced. Just before dehydrator 17 a
Collection I'! An IJ flow rate of 18 is provided, through which coagulation (polymer) is added to the sludge.

FIGS. 2 and 3 show a case in which the distance from the granular material service tank 2-6 to the dehydrator 17 is made into a unit in order to minimize the distance. Further, as shown in FIG. 4, the powder supply device 1 can be divided into a plurality of parts, arranged in series, and supplied into the respective service pipes 4.

It is taken out by the feeder 3 and supplied in full to an ejector 6 for pneumatic transportation. Air for transportation is supplied by compressor 6.
The air is then injected into the ejector 6 in the air transport pipe 4 via a dehumidifier, a header, and a pressure regulating valve (not shown). The powder mixed with air is vigorously injected into the sludge from the sludge addition nozzle 9 through the shortest route. The air mixed with the powder and granular material injected into the sludge is forced into the mixing section 12 located immediately after the ejector section 11 and passes through the turbulence generator 13, so it is strongly turbulently stirred and instantaneously mixes the sludge and powder. The grains are uniform.
mixed with

The sludge mixed and stirred with the powder and granules by the turbulence generator 13 is
A flocculant is added immediately before the dehydrator, and the product is introduced into the dehydrator 17, where it is separated into three parts: solid, liquid, and gas.

The liquid separated by the dehydrator 17 is sent out of the system through the liquid feed pipe 19 and stored in a storage tank 22, shipped as appropriate, and used as landfill material.

Effects of the Invention As explained above, the present invention uses a pneumatic transport method in a constant pressure feeding line for powder and granules, and further utilizes the air used for quantitative pressure feeding to transfer powder and granules to liquids being transferred on sealed piping. It is added by spraying under pressure from a nozzle, and it generates turbulent flow in the mixing section installed immediately after the spray nozzle, which instantly mixes and stirs the powder and liquid, allowing for sealed transportation. On line.

No dust is generated, only one pump is needed for the sludge line, and the conventional pump for pumping the mixture can be omitted. Therefore, the present invention has great advantages when the properties of the granular material are poor and there are concerns about corrosion of the pump or rotary stirrer after addition, a decrease in performance due to wear, a decrease in life, etc.

In addition, the conventional type using an open mixing stirring tank requires complicated control of water level, etc. during continuous use, but such control is unnecessary, which is advantageous in terms of instrumentation and control operation. In addition, there are few mechanically moving parts, making it suitable for mixing powder and granular materials.
The entire device is compact and requires a small installation area.

Furthermore, in the present invention, addition and mixing of powder and granules. The power source required for transfer is concentrated in the power of the air supply source, and the air source can be used with other devices, making it highly economical.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Fig. 1 is a system diagram of sludge dewatering plant equipment, Figs. 2 and 3 are side views showing an embodiment when unitized, and Fig. 4 is a diagram of a sludge dewatering plant. 5 and 6 are longitudinal sectional side views of the turbulence generator, and FIG. 7 is a system diagram of a conventional device. ■...1 granule supply device 3...Quantitative feeder 4.
... Sealed transport pipe 5 ... Ejector 7 ... Addition device
9... Nozzle 11... Ejector part 12... Mixing part 13... Turbulence generator 14... Pump 15... Meda mud storage tank
17... Dehydration applicant Marusei Heavy Industries Co., Ltd. 14th branch Sairikawa, 73 e+ KaM

Claims (1)

[Scope of Claims] 0) A granular material supply device equipped with a quantitative feeder, etc., and a granular material attached to this supply device and supplied from the granular material supply device by an ejector action using pressurized air, in a sealed pipe. A pneumatic conveying device for pressurizing the powder and granules, and a mixing section for mixing the pressurized powder and granules by spraying them together with air under pressure from a nozzle and adding them to the liquid being transferred on the pipe, are directly connected. Liquid mixing equipment. (2) Patent 0, characterized in that a turbulence generator is incorporated in the mixing section provided immediately after the additive production.
The solid-liquid mixing equipment according to claim 1, characterized in that the solid-liquid mixing equipment is provided in series.