CN205435120U - A helixseal continuous material discharge filter for supercritical water processing technology - Google Patents

Abstract

The utility model discloses a spiral-sealed continuous discharge filter used for supercritical water treatment technology, which comprises a filter cavity and a motor arranged on the top of the filter cavity, and a feed material is arranged at the upper end of the filter cavity wall. There is a filter screen inside the filter cavity, a clear liquid outlet on the outside of the filter screen, and a vertical discharge pipe at the bottom of the filter cavity; The driving rod is provided with several electric scrapers, and the bottom of the driving rod is also provided with two-stage helical blades. Since there is a vertical discharge pipe at the bottom of the filter cavity, the filter residue in the discharge pipe is easier to discharge than the filter residue in the horizontal discharge pipe due to gravity and pressure; there are two stages at the bottom of the drive rod The helical blade can prevent the phenomenon of extrusion and agglomeration caused by too much filter residue, and at the same time, the helical blade that acts as a seal and pushes the filter residue to promote the discharge of the filter residue.

Description

A spiral seal continuous discharge filter for supercritical water treatment process

technical field

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

Background technique

At present, continuous filters are widely used in chemical production, and have many advantages such as simple structure, high filtration accuracy, automatic cleaning of filter screens, and PLC intelligent control of discharge. Due to the sensitive response, safe use and low price of the solenoid valve, the discharge device of the conventional continuous 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. The service life is greatly limited, so the discharge pipes of conventional continuous filters are installed horizontally. The normal discharge process of the continuous filter is: the filtrate enters the filter screen through the liquid inlet, passes through the filter screen from the inside to the outside, and the filtered clear liquid enters the subsequent process through the clear liquid outlet. When the inner wall of the filter screen accumulates a certain amount of filter residue, 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 Rotate to clean the filter residue on the inner wall of the filter screen. The filter residue accumulates to the inlet of the discharge solenoid valve due to gravity sedimentation. At the same time, the PLC sends instructions to the solenoid valve to open the solenoid valve, and the pressure difference between the pressure inside the filter and the outlet of the solenoid valve is used for discharge. . 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 filter residue cleaned by the brush will accumulate in the discharge pipe and the inlet of the discharge solenoid valve, forming a relatively dense filter residue layer, which may agglomerate into blocks. At this time, even if the switch of the discharge solenoid valve is turned on, the pressure difference inside and outside the filter will be very It is difficult to achieve smooth discharge, and the filter residue 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 pipe to assist the discharge. This method is time-consuming and laborious, and the efficiency is extremely high. 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, the pressure cannot be kept stable, which will inevitably affect 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 a spiral-sealed continuous discharge filter for supercritical water treatment process. Discharge, and the internal pressure of the filter chamber is stable during discharge.

The utility model is realized through the following technical solutions:

A spiral-sealed continuous 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 a There is a filter screen inside the cavity, a clear liquid outlet is provided on the outside of the filter screen, and a vertical discharge pipe is provided at the bottom of the filter cavity; the central axis of the filter cavity is provided with a drive rod driven by a motor, and the drive rod There are several electric scrapers on the top, and there are two-stage helical blades at the bottom of the drive rod.

The two-stage helical blades sequentially include a stirring blade for stirring the filter residue and a helical blade for sealing and pushing the filter residue from top to bottom.

Stirring blades for stirring the filter residue are arranged in the conical cavity at the bottom of the filter cavity; spiral blades for sealing and pushing the filter residue are arranged in the vertical discharge pipe.

The distance between the helical blade for sealing and pushing the filter residue and the inner wall of the vertical discharge pipe is 0.15-1mm.

The diameter of the stirring blade used for stirring the filter residue is larger than the diameter of the helical blade used for sealing and pushing the filter residue.

The number of stirring blades for stirring the filter residue is 2 to 8 pieces.

The number of spiral blades used for sealing and pushing the filter residue is 2-10.

A discharge opening is welded at the bottom of the vertical discharge pipe.

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

The utility model discloses a spiral-sealed continuous discharge filter used for supercritical water treatment technology. A vertical discharge pipe in a vertical direction is arranged at the bottom of the filter cavity, so that the filter residue in the discharge pipe is arranged in a higher ratio than the horizontal one. The filter residue in the discharge pipe is easier to discharge due to gravity and pressure, which effectively solves the problem of easy blockage of the continuous filter for filtering high-content liquid. At the same time, there are two-stage helical blades at the bottom of the drive rod to stir, seal, and push the filter residue layer. The two-stage helical blades play a corresponding role in different positions where the material falls, ensuring effective material discharge and stable filtration. pressure inside the cavity. The spiral seal continuous discharge filter designed by the utility model cancels the setting of the discharge electromagnetic valve, which can ensure smoother discharge, and the pressure is stable and the system is safe. Therefore, the spiral-sealed continuous discharge filter of the utility model can be widely used in waste liquid or sludge treatment of supercritical water treatment process.

Further, the two-stage spiral blades include a stirring blade for stirring the filter residue and a spiral blade for sealing and pushing the filter residue from top to bottom. The stirring blade for stirring the filter residue is to prevent excessive accumulation and extrusion of the filter residue layer. The problem of agglomeration into blocks and difficult to move down, the helical blade that seals and pushes the filter residue is to seal the filter residue to stabilize the pressure in the filter cavity and push the filter residue to discharge during the discharge process.

Description of drawings

Fig. 1 is a structural schematic diagram of a spiral-sealed continuous discharge filter used in a 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 filter residue; 7. Spiral blade for sealing and pushing filter residue ; 8. Vertical discharge pipe; 9. 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 spiral seal continuous discharge filter that is used for supercritical water treatment process of the present utility model, comprises filter chamber and is arranged on the motor 1 of filter chamber top, is provided with on the filter chamber wall upper end There is a feed port 2, a filter screen 3 is provided inside the filter cavity, and a clear liquid outlet 5 is provided on the outside of the filter screen 3. The filter cavity is cylindrical, and the filter screen is also cylindrical. The outside of the type filter screen is the clear liquid outlet. After the filtrate is filtered through the filter screen, the solids in the filtrate are trapped on the inner wall of the filter screen by the filter screen, and the filtered clear liquid is discharged through the clear liquid outlet; There is a vertical discharge pipe 8; the central axis of the filter cavity is provided with a driving rod driven by the motor 1, and a number of electric scrapers 4 are arranged on the driving rod, and two-stage helical blades are also provided at the bottom of the driving rod.

The two-stage helical blades sequentially include a stirring blade 6 for stirring the filter residue and a helical blade 7 for sealing and pushing the filter residue from top to bottom. The stirring blade 6 for stirring the filter residue is set in the conical cavity at the bottom of the filter cavity; the spiral blade 7 for sealing and pushing the filter residue is set in the vertical discharge pipe 8 and welded at the bottom of the vertical discharge pipe 8 There is a discharge port 9.

Example 1

The screw seal continuous discharge filter used in the supercritical water treatment process in this embodiment includes a conventional continuous 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 2 stirring blades 6 and 4 stirring blades for stirring the filter residue from top to bottom. For sealing and pushing the helical blade 7 of the filter residue, the blade diameter of the stirring blade 6 for stirring the filter residue is larger than that of the blade diameter of the helical blade 7 for sealing and pushing the filter residue, and the blade of the helical blade 7 for sealing and pushing the filter residue The distance between the edge and the inner wall of the vertical discharge pipe is 0.15-1mm. A discharge opening 9 is welded at the bottom of the vertical discharge pipe 8 . 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 0.2MPa, and the fluctuation value does not exceed 5%.

Example 2

The screw seal continuous discharge filter used in the supercritical water treatment process in this embodiment includes a conventional continuous 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 4 stirring blades for stirring the filter residue from top to bottom. For sealing and pushing the helical blade 7 of the filter residue, the blade diameter of the stirring blade 6 for stirring the filter residue is larger than that of the blade diameter of the helical blade 7 for sealing and pushing the filter residue, and the blade of the helical blade 7 for sealing and pushing the filter residue The distance between the edge and the inner wall of the vertical discharge pipe is 0.15-1mm. A discharge opening 9 is welded at the bottom of the vertical discharge pipe 8 . 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 0.2MPa, and the fluctuation value does not exceed 5%.

Example 3

The screw seal continuous discharge filter used in the supercritical water treatment process in this embodiment includes a conventional continuous 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 6 for stirring the filter residue from top to bottom. For sealing and pushing the helical blade 7 of the filter residue, the blade diameter of the stirring blade 6 for stirring the filter residue is larger than that of the blade diameter of the helical blade 7 for sealing and pushing the filter residue, and the blade of the helical blade 7 for sealing and pushing the filter residue The distance between the edge and the inner wall of the vertical discharge pipe is 0.15-1mm. A discharge opening 9 is welded at the bottom of the vertical discharge pipe 8 . 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 0.2MPa, and the fluctuation value does not exceed 5%.

Since the vertical discharge pipe 8 is vertically placed under the discharge port of the continuous filter, the filter residue in the discharge pipe is more easily discharged than the filter residue in the horizontally arranged discharge pipe because of gravity and pressure; The lower end of the driving rod driven by the motor and provided with the electric scraper 4 is equipped with a stirring blade 6 for stirring the filter residue and a helical blade 7 for sealing and pushing the filter residue, which can prevent the phenomenon of extrusion and agglomeration caused by too much filter residue, and at the same time pass through Seal and push the helical blade of the filter residue to push the filter residue out.

The three embodiments above 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 (8)

1. the helixseal continuous pulp 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), is provided with vertical drainage conduit (8) at filter cavity bottom；Position, filter cavity axis is provided with the drive rod being rotated by motor (1), and drive rod is provided with some electronic wipers (4), is additionally provided with two-stage screw blade bottom drive rod.

Helixseal continuous pulp 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 filtering residue and the most successively for sealing and promote the helical blade (7) of filtering residue.

Helixseal continuous pulp 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 filtering residue；Helical blade (7) for sealing and promote filtering residue is arranged in vertical drainage conduit (8).

Helixseal continuous pulp discharge filter for supercritical water treatment technique the most according to claim 3, it is characterised in that the helical blade (7) being used for sealing and promoting filtering residue is 0.15～1mm apart from the distance of vertical drainage conduit inwall.

Helixseal continuous pulp 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 sealing and promote filtering residue of the stirring vane (6) of filtering residue.

Helixseal continuous pulp discharge filter for supercritical water treatment technique the most according to claim 2, it is characterised in that the quantity of the stirring vane (6) for stirring filtering residue is 2～8.

Helixseal continuous pulp discharge filter for supercritical water treatment technique the most according to claim 2, it is characterised in that the quantity being used for sealing and promoting the helical blade (7) of filtering residue is 2～10.

Helixseal continuous pulp discharge filter for supercritical water treatment technique the most according to claim 1, it is characterised in that have discharge gate (9) at vertical drainage conduit (8) bottom welding.