CN2589041Y

CN2589041Y - Drainage arrangement for heavy filtering medium percolator

Info

Publication number: CN2589041Y
Application number: CN 02293088
Authority: CN
Inventors: 吴文华; 陈铁军
Original assignee: YIXING ENVIRONMENTAL EQUIPMENT MANUFACTURING Co Ltd
Current assignee: YIXING ENVIRONMENTAL EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2002-12-25
Filing date: 2002-12-25
Publication date: 2003-12-03
Anticipated expiration: 2012-12-25

Abstract

The utility model relates to an improvement of a backwashing drainage device of a filter for heavy filter materials, particularly a filter drainage device which can effectively prevent the filter materials escaping in backwashing. The utility model is characterized in that the periphery of a dirt collecting funnel is provided with a settling funnel without an outfall tube. Thus, the formed backwashing drainage device preventing 'material escape' can cause partial filter materials rising with backwashing water to first go into the settling funnel, settle and return into the filter, so as to effectively prevent filter material loss caused by the 'material escape' in backwashing. A distance and a fall between the settling funnel and the backwashing draining dirt collecting funnel are regulated, so that broken fine filter materials go in the draining dirt collecting funnel with the backwashing water, while most carried filter materials can only fall into the settling funnel, settle and return into the filter.

Description

Heavy filtering material filter drainage arrangement

Technical field

Utility model is about the improvement to heavy filtering material filter backwash drainage arrangement, relates in particular to prevent effectively that when backwash filtrate from running the filter drainage arrangement that loses.

Background technology

Adopt the filter of heavy filtrate (as quartz sand, activated carbon, anthracite etc.), the dirt when effectively getting rid of backwash is provided with funnel shaped backwash drainage arrangement usually in filter.When filter operation a period of time,, need filtrate is carried out backwash because holding back of suspension dirt can cause the media filtration resistance to rise in the water.Yet in backwash process, owing to be subjected to the impact of high strength backwash water, the part filtrate tends to enter drain bucket with the backwash water rising and causes loss, " the running material " that promptly claims usually, this " running material " is particularly when adopting the air water mix backwash, the filtrate loss is particularly serious, causes the decline of strainability.

Summary of the invention

The purpose of utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of simple in structure, can effectively prevent the heavy filtering material filter drainage arrangement that filtrate " runs and loses " when backwash.

The utility model purpose realizes, the main improvement is the big sand setting funnel of setting up comb outside the nothing in the dirty funnel periphery of filter backwash draining collection, part filtrate with recoil liter waterborne when making recoil at first enters, and still enter filter, thereby prevented that effectively filtrate from entering water drain funnel and causing " running material " at this post precipitation.Specifically, utility model heavy filtering material filter drainage arrangement includes the dirt water drain funnel that drainpipe and the dirty funnel of collection are formed, and it is characterized in that the dirty funnel periphery of said collection has the sand setting funnel of the outer comb of a nothing.

The periphery of the said sand setting funnel of utility model, according to the filter size, back washing strength, the filtering material particle diameter, filtrate density proportion, comparatively suitable with 300-1000mm especially with the dirty funnel periphery of center draining collection spacing, the larger area sand deposition hopper has been slowed down the flow velocity of recoil water at the top, and the filtrate that the water that helps preventing recoiling carries enters dirt collecting bucket and causes " running material "; Said sand setting funnel inner peripheral surface can be tiltedly to face directly, also can be curved surface; Said sand setting funnel upper edge hole and water drain funnel upper edge hole can maintain an equal level, but wherein especially with low slightly for well, comparatively moderate with whereabouts 20-50mm, low slightly sand deposition hopper, the filtrate that the water that also helps preventing recoiling carries enters dirt collecting bucket, favourable filtrate recovery; The line of rabbet joint of sand setting funnel bottom is comparatively suitable with 20-60mm, and the line of rabbet joint is crossed detailed rules and regulations and can be caused filtrate to stop up, and is unfavorable for that the precipitation filtrate returns filter in the sand setting funnel, and the line of rabbet joint is wide, causes recoil water to be poured in the precipitation of unfavorable filtrate by the bottom easily.For the water that effectively prevents to recoil is poured in by the sand deposition hopper bottom, a wall that can constitute the sand setting funnel extends, and blocks the line of rabbet joint of funnel bottom, also can be the baffle plate that other form is set in funnel bottom.

Utility model is owing to the big sand setting funnel that has additional comb outside the nothing in the dirty funnel periphery of draining collection, anti-" running material " backwash drainage arrangement of forming, can make the part filtrate that rises with backwashing water, at first enter the sand setting funnel, obtain precipitation and return in the filter at this, thus the filtrate loss that " running material " when effectively having prevented backwash causes.Regulate the dirty funnel distance of sand setting funnel and backwash draining collection, and both drops, can reach the tiny filtrate that can make fragmentation and enter the dirty funnel of draining collection with backwash water, major part is carried filtrate then can only fall into the sand setting funnel, and precipitation is returned in the filter.

Below in conjunction with two kinds of specific embodiment, further specify the utility model structure.

Description of drawings

Fig. 1 is a prior art filter drainage arrangement structural representation.

Fig. 2 is utility model embodiment 1 a drainage arrangement structural representation.

Fig. 3 is utility model embodiment 2 drainage arrangement structural representations.

The specific embodiment

Embodiment 1: referring to Fig. 2, utility model heavy filtering material filter is got rid of the water device, include outer drainpipe 2, the dirty funnel 1 of draining collection, dirty funnel 1 periphery of draining collection has crossing

swash plate

4 and 5 to surround, than the big 50mm of the dirty funnel periphery of draining collection, and the sand deposition hopper 6 that falls to hanging down 30mm, the sediment outflow line of rabbet joint 7 of sand setting funnel bottom is 30mm, for preventing that backwash water from directly pouring in the sand setting funnel from the bottom, influence the filtrate precipitation, the swash plate 4 of forming the sand setting funnel has the outer water fender 8 that extends.

During backwash, backwashing water is entered by filtering layer 3 bottoms and lifts filtrate, backwash water is carried dirt and a small amount of filtrate secretly, at first overflow into sand setting funnel cross section, and obtain slowing down at this, filtrate sinks to being returned in the filter by the line of rabbet joint 7 because of gravity, and dirt and broken filtrate are then because lighter relatively, flow into the dirty funnel of draining collection with backwash water, discharge with backwash water.

Embodiment 2: referring to Fig. 3, as embodiment 1, the sand setting funnel of the dirty funnel periphery of draining collection is only surrounded by single swash plate 9, and the following line of rabbet joint is provided with water fender 8 outward in addition.

Claims

1, a kind of heavy filtering material filter drainage arrangement includes the dirt water drain funnel that drainpipe and the dirty funnel of collection are formed, and it is characterized in that the dirty funnel periphery of said collection has the sand setting funnel of the outer comb of a nothing.

2,, it is characterized in that the dirty funnel periphery of said sand setting funnel periphery and draining collection spacing is 300-1000mm according to the described heavy filtering material filter of claim 1 drainage arrangement.

3,, it is characterized in that said sand setting funnel upper edge hole is lower than the dirty funnel bead of draining collection 20-50mm according to the described heavy filtering material filter of claim 1 drainage arrangement.

4, according to the described heavy filtering material filter of claim 1 drainage arrangement, the line of rabbet joint that it is characterized in that said sand setting funnel bottom is 20-60mm.