CN205435121U - A online steady voltage is in succession arranged and is expected filter for supercritical water processing technology - Google Patents

Abstract

The utility model discloses an on-line continuous pressure-stabilizing discharge filter for supercritical water treatment process, which comprises a filter cavity and a motor arranged on the top of the filter cavity, and an inlet The material port is provided with a filter screen inside the filter chamber, and a clear liquid outlet is provided outside the filter screen. A driving rod driven by a motor is provided on the central axis of the filter chamber, and a number of electric scrapers are arranged on the driving rod. There are two-stage spiral blades at the bottom of the drive rod; a vertical discharge pipe is provided at the bottom of the filter cavity, and a discharge port is provided at the bottom of the vertical discharge pipe, and a liquid-solid rotary sealing valve is also provided on the vertical discharge pipe . The filter has a reasonable structural design, is easy to operate, can realize continuous non-blocking discharge, and can stabilize the internal pressure of the filter cavity.

Description

An online continuous constant pressure discharge filter for supercritical water treatment process

technical field

The utility model belongs to the technical field of filtration and separation, in particular to an online continuous pressure-stabilizing discharge filter used in a supercritical water treatment process.

Background technique

At present, online filters are widely used in industrial production and have many advantages such as high filtration precision, automatic cleaning of filter screens, and PLC intelligent control of discharge. Due to the simple structure, sensitive response and safe use of the solenoid valve, the discharge device of the conventional in-line filter uses the solenoid valve as the switch of the discharge pipe, and the reliability of the solenoid valve in the vertical discharge pipe is very poor. Life is greatly limited, so the discharge pipes of conventional in-line filters are installed horizontally. When a certain amount of slag is accumulated on the inner wall of the filter screen, the monitoring system detects that the pressure difference reaches the cleaning pressure difference or judges that the cleaning time has come according to the time set by the user, then the PLC sends an instruction to start the electric scraper, and the electric scraper starts to rotate. Clean the slag on the inner wall of the filter screen. The slag accumulates to the inlet of the discharge solenoid valve due to the action of gravity sedimentation. At the same time, the PLC sends instructions to the solenoid valve to open the solenoid valve, and the discharge is carried out by using the pressure in the filter and the pressure difference at the outlet of the solenoid valve. . However, the waste liquid or sludge used in the supercritical water treatment process generally has a high material content, and the material content after treatment is still high. The slag cleaned by the brush will accumulate in the discharge pipe and the inlet of the discharge solenoid valve, forming a relatively dense slag layer, which may agglomerate into blocks. At this time, even if the switch of the discharge solenoid valve is turned on, the pressure difference between inside and outside the filter It is also difficult to achieve smooth discharge, and the slag in the filter will accumulate more and more, which will affect the normal operation of the filter. At this time, it is necessary to manually dredge the discharge pipeline to assist the discharge. This method is time-consuming and laborious , the efficiency is extremely low. In addition, even if the material can be discharged smoothly, this intermittent discharge method that relies on pressure difference or time to automatically control the discharge has the biggest disadvantage: there will be pressure fluctuations inside the filter cavity during discharge, which will affect the pressure of the filter inlet pipeline , causing pressure fluctuations throughout the system. Because the cavity of the filter is connected to the atmosphere through the discharge pipe and the discharge solenoid valve during discharge, as the discharge process progresses, the pressure of the filter cavity will gradually decrease. When the discharge process ends, the discharge solenoid valve will Closed, the cavity pressure of the filter will gradually rise again, so the discharge valve is continuously opened and closed, and the pressure cannot be kept stable, which affects the safety of the system.

Utility model content

In order to overcome the above-mentioned defects in the prior art, the purpose of this utility model is to provide an online continuous pressure-stabilized discharge filter for supercritical water treatment process. Blockage discharge, and can stabilize the pressure inside the filter cavity.

The utility model is realized through the following technical solutions:

An on-line continuous pressure-stabilized discharge filter for supercritical water treatment process, including a filter cavity and a motor arranged on the top of the filter cavity, a feed inlet is arranged at the upper end of the filter cavity wall, and the There is a filter screen inside the filter chamber, and a clear liquid outlet is provided on the outside of the filter screen. The central axis of the filter chamber is provided with a drive rod driven by a motor to rotate. There are several electric scrapers on the drive rod. Two-stage spiral blades; a vertical discharge pipe is provided at the bottom of the filter cavity, a discharge port is provided at the bottom of the vertical discharge pipe, and a liquid-solid rotary sealing valve is also provided on the vertical discharge pipe.

The two-stage helical blades sequentially include a stirring blade for stirring the slag layer and a helical blade for loosening the slag layer from top to bottom.

Stirring blades for stirring the slag layer are arranged in the conical cavity at the bottom of the filter cavity; spiral blades for loosening the slag layer are arranged in the vertical discharge pipe.

The distance between the helical blade for loosening the slag layer and the inner wall of the vertical discharge pipe is 1-5mm.

The diameter of the stirring blade for stirring the slag layer is larger than the diameter of the helical blade for loosening the slag layer.

The number of stirring blades for stirring the slag layer is 2-8.

The number of spiral blades used for loosening the slag layer is 1-4.

The number of electric scrapers is 2 to 8 pieces.

One end of the liquid-solid rotary sealing valve is connected with the vertical discharge pipe through the pipe flange.

The other end of the liquid-solid rotary seal valve is connected to the discharge port through a pipe flange.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model discloses an on-line continuous pressure-stabilized discharge filter for supercritical water treatment process. Firstly, a vertical discharge pipe in the vertical direction is arranged at the bottom of the filter cavity, so that the discharge pipe in the discharge pipe The filter residue is easier to discharge than the filter residue in the horizontally arranged discharge pipe due to gravity and pressure, which effectively solves the problem of easy blockage of the continuous filter for filtering high-content liquid. Secondly, there are two-stage helical blades at the bottom of the drive rod to stir and loosen the slag layer. The two-stage helical blades play a corresponding role in different positions where the material falls, ensuring effective discharge of materials and stabilizing the filter. cavity internal pressure. Finally, the liquid-solid rotary seal valve is applied to the discharge design of the online filter. The discharge direction of the slag is vertically downward, from the inlet section of the liquid-solid rotary seal valve to the outlet section. Using the characteristics of the liquid-solid rotary seal valve, Realized the continuous steady pressure discharge of the online filter. The device of the utility model can realize continuous non-clogging discharge, and can stabilize the internal pressure of the filter cavity, so it can be widely used in the waste liquid or sludge treatment of the supercritical water treatment process.

Further, the two-stage spiral blades sequentially include a stirring blade for stirring the slag layer and a helical blade for loosening the slag layer from top to bottom. The arrangement of the stirring blades is to stir the slag layer. Loose the slag layer to prevent the problem that it is difficult to discharge smoothly due to agglomeration and agglomeration caused by excessive accumulation and extrusion of the slag layer.

Description of drawings

Fig. 1 is a schematic structural view of the online continuous pressure-stabilizing discharge filter used in the supercritical water treatment process of the present invention.

Among them, 1. Motor; 2. Liquid inlet; 3. Filter screen; 4. Electric scraper; 5. Clear liquid outlet; 6. Stirring blade for stirring the slag layer; Spiral blade; 8. Vertical discharge pipe; 9. Liquid-solid rotary sealing valve; 10. Discharge port.

detailed description

The utility model will be further described in detail below in conjunction with specific embodiments, which are explanations of the utility model rather than limitations.

Referring to Fig. 1, a kind of on-line continuous pressure-stabilized discharge filter for supercritical water treatment process of the present utility model comprises a filter cavity and a motor 1 arranged on the top of the filter cavity, and the filter cavity wall The upper end is provided with a feed port 2, and a filter screen 3 is provided inside the filter chamber, and a clear liquid outlet 5 is provided on the outside of the filter screen 3, and a drive rod driven by a motor 1 is provided at the central axis of the filter chamber, and the drive rod There are a number of electric scrapers 4 on the top, and two-stage spiral blades are provided at the bottom of the drive rod; a vertical discharge pipe 8 is provided at the bottom of the filter cavity, and a liquid-solid rotary sealing valve 9 is provided at the bottom of the vertical discharge pipe 8. The other end of the liquid-solid rotary sealing valve 9 is connected with the discharge port 10 .

The two-stage helical blades sequentially include a stirring blade 6 for stirring the slag layer and a helical blade 7 for loosening the slag layer from top to bottom. The stirring blade 6 for stirring the slag layer is arranged in the conical cavity at the bottom of the filter cavity; the helical blade 7 for loosening the slag layer is arranged in the vertical discharge pipe 8 . The distance between the helical blade 7 for loosening the slag layer and the inner wall of the vertical discharge pipe 8 is 1-5mm. The diameter of the stirring blade 6 for stirring the slag layer is larger than the diameter of the helical blade 7 for loosening the slag layer. The number of helical blades of the stirring blade 6 for stirring the slag layer is 2-8. The number of helical blades 7 for loosening the slag layer is 1-4. The quantity of the electric wipers 4 is 2 to 8 pieces. The liquid-solid rotary sealing valve 9 is connected with the vertical discharge pipe 8 through a pipe flange. The other end of the liquid-solid rotary sealing valve 9 is also connected to the discharge port 10 through a pipe flange.

Example 1

This embodiment is used for the online continuous pressure-stabilized discharge filter of the supercritical water treatment process, including a conventional online filter. The driving rod driven by the motor 1 is installed in the center of the filter cavity, and the driving rod is provided with an electric scraper. 4. There is a vertical discharge pipe 8 at the bottom of the filter cavity, and the lower end of the driving rod with the electric scraper 4 driven by the motor 1 is sequentially equipped with 4 stirring blades 6 and 2 for stirring the slag layer from top to bottom. The sheet is used for the screw blade 7 of the loose material slag layer, and the blade diameter of the stirring blade 6 for stirring the material slag layer is larger than the blade diameter of the helical blade 7 for the loose material slag layer, and the spiral blade for loose material slag layer The distance between the edge of the blade 7 and the inner wall of the vertical discharge pipe is 1-5 mm. The vertical discharge pipe 8 is connected to the inlet of the liquid-solid rotary sealing valve 9 through a pipe flange, and the outlet of the liquid-solid rotary sealing valve 9 is also connected to the discharge port 10 through a pipe flange. In the process of filtering and discharging, the inlet pressure is maintained at 0.4MPa, and the pressure in the inner cavity of the filter is always maintained at about 0.3MPa, and the fluctuation value does not exceed 3%.

Example 2

This embodiment is used for the online continuous pressure-stabilized discharge filter of the supercritical water treatment process, including a conventional online filter. The driving rod driven by the motor 1 is installed in the center of the filter cavity, and the driving rod is provided with an electric scraper. 4. There is a vertical discharge pipe 8 at the bottom of the filter cavity, and the lower end of the driving rod with the electric scraper 4 driven by the motor 1 is sequentially equipped with 8 stirring blades 6 and 4 for stirring the slag layer from top to bottom. The sheet is used for the screw blade 7 of the loose material slag layer, and the blade diameter of the stirring blade 6 for stirring the material slag layer is larger than the blade diameter of the helical blade 7 for the loose material slag layer, and the spiral blade for loose material slag layer The distance between the edge of the blade 7 and the inner wall of the vertical discharge pipe is 1-5mm. The vertical discharge pipe 8 is connected to the inlet of the liquid-solid rotary sealing valve 9 through a pipe flange, and the outlet of the liquid-solid rotary sealing valve 9 is also connected to the discharge port 10 through a pipe flange. In the process of filtering and discharging, the inlet pressure is maintained at 0.4MPa, and the pressure in the inner cavity of the filter is always maintained at about 0.3MPa, and the fluctuation value does not exceed 3%.

Because the bottom of the online filter is provided with a vertical discharge pipe 8, the slag in the discharge pipe is easier to discharge than the slag in the horizontally arranged discharge pipe because of the simultaneous action of gravity and pressure; The lower end of the drive rod with electric scraper is equipped with a stirring blade for stirring the slag layer and a spiral blade for loosening the slag layer, which can prevent the extrusion and agglomeration phenomenon caused by too much slag and assist the discharge of slag; A liquid-solid rotary sealing valve is installed in the middle of the vertical discharge pipe, which utilizes the characteristics of the liquid-solid rotary sealing valve to realize continuous and stable pressure discharge.

The above two embodiments of the utility model have been described in detail, but the content described is only a preferred embodiment of the utility model, and cannot be considered as limiting the implementation scope of the utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (10)

1. the on-line continuous voltage stabilizing discharge filter for supercritical water treatment technique, it is characterized in that, including filter cavity and the motor (1) that is arranged on filter cavity top, it is provided with charging aperture (2) in filter chamber body wall upper end, it is provided with drainage screen (3) in filter inside cavity, drainage screen (3) outside is provided with purified liquor outlet (5), position, filter cavity axis is provided with the drive rod being rotated by motor (1), drive rod is provided with some electronic wipers (4), is provided with two-stage screw blade bottom drive rod；Being provided with vertical drainage conduit (8) at filter cavity bottom, vertical drainage conduit (8) bottom is provided with discharge gate (10), vertical drainage conduit (8) is additionally provided with liquid-solid rotary seal valve (9).

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 1, it is characterized in that, described two-stage screw blade includes the stirring vane (6) for stirring material slag blanket and the helical blade (7) for loose material slag blanket the most successively.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 1, it is characterised in that be arranged in the conical cavity of filter cavity bottom for stirring the stirring vane (6) of material slag blanket；Helical blade (7) for loose material slag blanket is arranged in vertical drainage conduit (8).

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 3, it is characterised in that the helical blade (7) for loose material slag blanket is 1～5mm apart from the distance of vertical drainage conduit (8) inwall.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 2, it is characterized in that, for stirring the diameter diameter more than the helical blade (7) for loose material slag blanket of the stirring vane (6) of material slag blanket.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 2, it is characterised in that the quantity being used for stirring the stirring vane (6) of material slag blanket is 2～8.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 2, it is characterised in that the quantity for the helical blade (7) of loose material slag blanket is 1～4.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 1, it is characterised in that the quantity of electronic wiper (4) is 2～8.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 1, it is characterised in that liquid-solid rotary seal valve (9) is connected with vertical drainage conduit (8) by pipe flange.

On-line continuous voltage stabilizing discharge filter for supercritical water treatment technique the most according to claim 1, it is characterised in that discharge gate (10) is connected with liquid-solid rotary seal valve (9) by pipe flange.