JPS6311043B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a strainer for a slurry line, and particularly to a strainer that is easy to clean.

[Conventional technology]

in exhaust gas using limestone or lime slurry.
In wet desulfurization equipment that absorbs and removes SO ₂ , scaling on the walls and internal parts of absorption towers or tanks cannot be completely prevented.
The scale formed on these surfaces is partially detached during operation or when starting or stopping, and becomes large and small scale fragments that enter the absorption tower circulation system and piping system.

These scale pieces accelerate wear on the pump and piping, and cause blockages in parts with throttles such as spray nozzles or flow control valves, so a strainer is usually provided at the pump inlet to collect and remove them.

A cross-sectional view of a conventional strainer is shown in FIG.

In this figure, the slurry containing scale pieces is
Slurry enters the casing 3 through the inlet pipe 1, is filtered by a cylindrical screen 4 with many holes built into the casing 3, and is then sucked into the pump through the outlet pipe 2. The collected scale pieces are stored in a pocket 12 at the bottom of the casing.

On the other hand, since the screen 4 gradually becomes clogged during operation, it is necessary to periodically clean it. When cleaning the screen 4, the structure is such that the door 9 is opened and the pressure from the spring 8 is released, and then the screen 4 is taken out upward. It's summery. At this time, the scale pieces and slurry accumulated in the casing 3 are discharged by opening the drain valve 11.

[Problem that the invention seeks to solve]

A strainer having such a structure has the following drawbacks and inconveniences.

(1) Since the drain seat 10 is blocked by slurry accumulation and collected scale pieces, it becomes difficult to remove the deposits from the drain seat 10 after removing the screen 4.

(2) As the capacity increases, the height of the casing 3 increases, and the screen 4 also becomes larger and heavier, making it difficult to remove the screen 4 from inside the casing 3.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a strainer for a slurry line that is easy to handle.

[Means for solving problems]

The gist of the present invention is a strainer for a slurry line equipped with a screen for collecting scale debris and a casing incorporating the screen.
Slide rails made of half pipes are attached to the upper and lower ends of the screen, and a chevron-shaped protrusion rail that can slide on the slide rails is provided on the casing side opposite to the slide rails;
A strainer for a slurry line, characterized in that a screen extraction door is provided in the lateral direction of the casing.

[Effect]

A slide rail is attached to the upper and lower ends of the screen, a chevron-shaped protrusion rail that can slide on the slide rail is provided on the casing side opposite to the slide rail, and a screen extraction door is provided in the lateral direction of the casing. Therefore, with the weight of the screen on the slide rail, it can be easily pulled out laterally without lifting the screen.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. FIG. 2 is a partially cutaway plan view showing the plane of the slurry line strainer according to the embodiment of the present invention, and FIG.
The figure shows a sectional view taken along the line -- in FIG.

In FIG. 2, the slurry containing scale particles flowing in from the inlet pipe 1 passes in an almost uniform flow over the entire surface of the screen 4 formed by bending a perforated plate, and the scale particles are removed by the screen 4. The separated scale pieces are deposited on the bottom of the screen 4 shown in FIG. On the other hand, the slurry filtered by the screen 4 passes through the outlet pipe 2 shown in FIG. 2 and is sucked into the pump provided ahead.

When viewed from above, the screen 4 is curved into a mountain shape relative to the slurry flow as shown in FIG. 2, and approximately the center of the screen 4 is welded to the stay 13, and a plurality of screens are attached and formed according to the required filtration area. It is something. In addition, there are third
As shown in the figure, a slide rail 15 made of a half-split pipe is attached to the stay 13 over its entire length in the longitudinal direction. Note that reinforcing perforated plates 14 are also attached to the triangular upper and lower surfaces of the screen 4, thereby expanding the filtration area and reinforcing the screen 4.

On the other hand, a rail 16 having a chevron-shaped protrusion is provided on the casing 3 so as to face the slide rail 15. By inserting the slide rail 15 located above and below the screen 4 along the rail 16, It has a structure that allows it to be fixed in place. If the screen 4 gradually becomes clogged during operation and the screen 4 is to be cleaned periodically, first remove the slurry in the strainer and piping from the drain valve 11 from the drain seat 10 provided on the piping before and after the strainer. Most of the slurry remaining at the bottom of the strainer is discharged from the drain seat 10.

Even if this drain seat 10 should become clogged with scale pieces and a small amount of accumulated slurry, the amount of slurry remaining will be small due to the shape of the casing 3. Therefore, the door 9 shown in FIG. 2 can be opened and the screen 4 can be easily pulled out. Further, since the slide rail 15 on the screen 4 side and the rail 16 on the casing 3 side are in line contact, the frictional force is small, making it easy to pull out the screen 4 and clean the screen 4. Scale pieces accumulated at the bottom of the casing 3 can be easily scraped out through the opening of the door 9.

According to the above-mentioned embodiment of the present invention, since there is no large difference between the casing diameter and the inlet/outlet pipe diameter, there is no flow stagnation, making it difficult for slurry to accumulate, and it is easy to put in and take out the screen and scrape out collected scale pieces. There is an effect that

In other embodiments of the invention, the screen may be arcuate instead of folded. Also,
A wire mesh can also be used to further reduce weight. In addition, using an expansion tube at the connection part of the inlet and outlet tubes,
It is also possible to create a more uniform flow of liquid in the longitudinal direction of the casing.

〔Effect of the invention〕

According to the present invention, slide rails are provided at the upper and lower ends of the screen, and a door for removing the screen is provided in the lateral direction of the casing, making it easier to remove the screen from the casing and improving workability in cleaning the strainer. It has the effect of

[Brief explanation of the drawing]

FIG. 1 shows a sectional view of a conventional strainer, FIG. 2 shows a partially cutaway plan view of a strainer according to an embodiment of the present invention, and FIG. 3 shows a sectional view taken along the line -- in FIG. 1...Inlet pipe, 2...Outlet pipe, 3...Casing, 4
...Screen, 5...Screen holder, 6...Reinforcement ring,
7... Seal ring, 8... Spring, 9... Door,
10...Drain extraction seat, 11...Drain valve, 12
... pocket part, 13 ... stay, 14 ... reinforced perforated plate, 15 ... slide rail, 16 ... rail.

Claims (1)

[Claims] 1. A strainer for a slurry line equipped with a screen for collecting scale fragments and a casing containing the screen, in which half-pipe slide rails are attached to the upper and lower ends of the screen, A chevron-shaped protrusion rail that is slidable on the slide rail is provided on the casing side facing the slide rail, and a screen extraction door is provided in the lateral direction of the casing. Strainer for slurry line. 2. A strainer for a slurry line according to claim 1, wherein the diameter of the slurry inlet/outlet pipe is defined to be similar to the diameter of the casing.