CN109081428B - Filler collection device and method for water treatment SIFAS system - Google Patents

Abstract

The present invention discloses a filler collecting device for a water treatment SIFAS system. The water treatment pool is provided with a drain outlet, a filler intercepting device is provided in front of the drain outlet, the upper edge of the filler intercepting device is kept at a distance or flush with the liquid surface in the water treatment pool, and a collection ditch is provided behind the upper edge of the filler intercepting device. The present invention utilizes the characteristics of the fillers being piled up in front of the filler intercepting device and pushing and climbing up each other, so that the filler pile arches out of the height of the filler intercepting device and falls into the collection ditch, thereby avoiding shutdown caused by serious accumulation of fillers, having a high filler export rate, being safe and energy-saving, and being suitable for various water treatment pools that need to put fillers.

Description

Filler collection device and method for water treatment SIFAS system

Technical Field

The invention relates to the technical field of water treatment.

Background technique

At present, fillers need to be put into the filler pool of the biochemical section of water treatment to attach microorganisms and increase the amount of microorganisms. A filler interception device is set in the water treatment filler pool to prevent the filler from flowing out of the filler pool. However, the filler will always flow to the interception device with the water flow and accumulate on the filler interception device. As time goes by, the accumulation amount will become larger and larger, blocking the filler interception device. In order to avoid blockage and slow down the accumulation, the technical means used in the prior art include adding a propeller in the filler pool, speeding up the flow rate, and using water flow to impact and evacuate the accumulated filler. This method undoubtedly consumes a lot of energy and will cause wear on the filler and equipment; or use a special spiral centrifugal pump to export the accumulated filler to the front end of the filler pool for recirculation, but this method consumes a lot of energy and will also bring a large amount of water to the front end.

In actual engineering experience, the above two methods cannot avoid the problem of shutdown due to excessive packing accumulation due to machine failure. Severe packing accumulation affects the efficiency of water treatment. What's worse, once the packing accumulates too much and overflows the water treatment tank, it will cause serious production accidents. Therefore, the work of evacuating the accumulated packing cannot be ignored. For a large-volume water treatment tank, the work of evacuating the accumulated packing generally requires a week of shutdown, and the corresponding upstream and downstream processes are forced to shut down. The economic loss is generally hundreds of thousands per day. For sewage treatment, there are more risks in terms of ecological and environmental protection.

Summary of the invention

The technical problem solved by the present invention is to provide a filler collection device and method for a water treatment SIFAS system with high filler collection rate and no energy consumption.

The technical solution adopted by the present invention is a filler collecting device for a water treatment SIFAS system. A filler intercepting device is arranged in a water treatment tank, and a collection ditch is arranged behind the filler intercepting device.

The front end of the aggregate ditch is fitted with the filler intercepting device.

The upper edge of the filler interception device is kept flush with or at a distance from the liquid surface in the water treatment tank.

The distance between the upper edge of the filler interception device and the liquid level in the water treatment tank is no more than 30 cm.

The distance between the upper edge of the filler interception device and the liquid surface shall not exceed 80cm.

The filler interception device is a cylindrical interception net, a plate interception net or a combined interception net.

The cross section of the aggregate ditch is U-shaped, V-shaped, rectangular or wedge-shaped with the opening facing upward, and the front end of the aggregate ditch is not higher than the upper edge of the filler interception device.

The rear end of the aggregate ditch is higher than the liquid level.

The aggregate ditch is built with building materials or formed by processing metal plates or plastic plates.

The upper end of the filler intercepting device is a lifting structure.

By using the filler collection device method of the water treatment SIFAS system, a filler interception device is provided in the water treatment tank, and a collection ditch is provided behind the filler interception device; the front end of the collection ditch is fitted with the filler interception device;

As the filler pool operates, water flows through the filler intercepting device, and the filler is intercepted by the filler intercepting device. The filler gathers more and more in front of the filler intercepting device and continues to climb to form a filler pile. When the height of the filler pile is higher than the upper edge of the filler intercepting device, the filler on the top of the filler pile falls into the aggregate ditch, and the filler in the aggregate ditch is collected.

The beneficial effect of the present invention is that the filler collection device and method for the water treatment SIFAS system of the present invention has a high filler extraction rate, completely avoiding the risk of shutdown due to filler accumulation, and the extraction process does not require the addition of high-energy consumption equipment, and the extraction process consumes little or no energy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a filler outlet method of the present invention.

FIG. 2 is another embodiment of the filler collecting device for the water treatment SIFAS system of the present invention.

FIG. 3 is a schematic diagram of an implementation of the present invention applicable to different water treatment tanks.

Markings in the figure are: 1-filler interception device, 2-aggregate ditch, 3-filler, 4-filler pile, 5-cylindrical interception net, 7-drainage outlet.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Among them, SIFAS refers to: S-SYSTEM system, IFAS process and hardware facilities are integrated into a system. IFAS refers to the biofilm/activated sludge combined process.

As shown in Figure 1, the water-facing surface of the filler interception device 1 is the front, and the water-receiving surface is the rear, and the water flows from the water-facing surface through the filler interception device 1 to the water-receiving surface. The water treatment SIFAS system of the present invention uses a filler collection device, and a filler interception device 1 is provided in the water treatment pool, and a collection ditch 2 is provided behind the filler interception device 1. The filler interception device 1 is arranged in the filler pool, and in most cases, it is arranged in front of the drain port 7, and it may also be arranged at the end of the filler area. The filler interception device 1 is used to intercept fillers 3 in the water. The fillers 3 are sometimes also called carriers or filter materials. Microorganisms are attached to the fillers 3 to decompose pollutants in the water. The fillers 3 are generally granular and move freely in the pool. The internal multi-void structure makes the surface area for attaching microorganisms large. The fillers 3 can only play a role in the water treatment pool, and once the fillers 3 leak out or overflow the water treatment pool, a serious production accident will occur. In order to ensure the safety of filler interception, the upper edge of the filler interception device 1 of the present invention can be higher than the liquid level in the water treatment tank by a certain distance, lower than the liquid level by a certain distance, or flush with the liquid level. In short, it is necessary to ensure that the filler can safely overflow from the top of the filler interception device. A collection groove 2 is provided behind the upper edge of the filler interception device 1. The front end of the collection groove 2 is in contact with the filler interception device 1, and the front end of the collection groove 2 must be lower than the upper edge of the filler interception device 1. The collection groove 2 is used to receive the filler overflowing from the filler interception device 1.

When the length of the aggregate ditch 2 and the filler interception device 1 is the same, the aggregate ditch 2 as a whole extends along the length direction of the filler interception device 1, and is consistent with the direction of the upper edge of the filler interception device 1. The aggregate ditch 2 can be segmented, and multiple aggregate ditch 2 units are combined to form an aggregate ditch 2. Especially in the case of special pool shapes and the coexistence of multiple collection systems, it is not necessary to set the aggregate ditch 2 behind the entire filler interception device 1.

As the water treatment pool operates, the filler 3 is continuously accumulated in front of the filler intercepting device 1 along with the water flow. When the filler 3 accumulates more and more, and under the action of the water flow, aeration and the friction and pushing between the filler 3, a continuously rising filler pile 4 is formed in front of the filler intercepting device 1. When the height of the filler pile 4 is higher than the upper edge of the filler intercepting device 1, the filler 3 on the top will fall into the aggregate ditch 2; the filler 3 in the aggregate ditch 2 can be collected and put into the water treatment pool again, so that the water treatment pool can continue to operate.

The upper edge of the filler interception device 1 can be higher or lower than the liquid level in the water treatment tank by a certain distance. When the upper edge of the filler interception device 1 is higher than the liquid level, the filler pile 4 first climbs above the liquid level, and then continues to climb to cross the upper edge of the filler interception device 1 before falling into the aggregate ditch 2. In this way, there is very little liquid in the aggregate ditch. The distance between the upper edge of the filler interception device 1 and the liquid level should be a safe overflow distance. The safe overflow distance means that when the filler is accumulated to cross the upper edge of the filler interception device 1, the filler accumulation will not overflow the water treatment tank, and the filler accumulation will not affect the safety and filtration performance of the filler interception device 1. The safe overflow distance above the liquid level is generally not more than 30cm. For water treatment tanks with severe accumulation and high accumulation speed, 20cm can generally be adopted. The stacking height of the filler 3 depends on many factors, such as: filler input ratio, filler specific gravity, aeration, water flow rate, filler interception device 1 area and filler interception device 1 structure.

The upper edge of the filler interception device 1 can also be lower than the liquid surface. As shown in FIG2, at this time, the filler 3 on the top of the filler pile 4 will enter the aggregate ditch 2 together with the water flow. However, because the density of the filler 3 is generally less than that of water, the filler 3 gathers more on the liquid surface, so the amount of filler 3 entering the aggregate ditch is large. At this time, the distance between the upper edge of the filler interception device 1 and the liquid surface should be controlled not to be greater than the safe distance, otherwise the proportion of water in the aggregate ditch will be too high. The distance between the upper edge of the filler interception device 1 and the liquid surface can be up to 80 cm at most. When the filling density of the filler pool is small and the packing speed is small, the distance can be shortened by 60 cm, 40 cm, 20 cm or even shorter when the required conveying volume is small.

The upper edge of the filler interception device 1 can also be kept flush with the liquid surface. In order to arbitrarily adjust the distance between the upper edge of the filler interception device 1 and the liquid surface, the upper end of the filler interception device 1 is set to be liftable. A common movable connection method can be used between the liftable part of the upper part of the filler interception device 1 and the fixed part of the lower part. The liftable part of the filler interception device can also be realized by overlapping and removing the movable weir body, and the movable weir body unit can be made of plates, profiles, etc.

The filler interception device 1 as a whole can be a cylindrical interception net 5, a plate interception net or a combined interception net, or other forms of filler interception devices used in the industry, as shown in FIG2 and FIG3.

The cross section of the aggregate ditch 2 is U-shaped, V-shaped, wedge-shaped with the opening facing upward, rectangular or other polygonal; the cross-sectional shape and size can be specifically selected according to actual conditions and technical requirements, such as the packing stacking speed, the packing transfer method, etc. For example, if the amount of filler collected is large, then a larger cross section may be required. For example, if the filler is transferred by equipment, then the cross-sectional shape needs to be compatible with the transfer equipment. The aggregate ditch 2 can also be a variable cross-sectional shape, or the bottom can be tilted to facilitate the collection of the filler 3 in one direction, etc., which can be diversified according to actual use needs. The aggregate ditch 2 can be built with building materials or processed and formed by metal plates or plastic plates. For water treatment pools that have been put into use, the transformation according to the present invention may not have the possibility of using building materials to construct the aggregate ditch, so it is also feasible to use metal plates to process the aggregate ditch, and fiberglass materials, plastic materials, wooden materials, etc. can also be used.

The present invention utilizes the characteristics of fillers piling up in front of the filler intercepting device and pushing each other to climb up, so that the filler pile 4 arches out of the height of the filler intercepting device and falls into the aggregate ditch 2, avoiding shutdown caused by serious filler accumulation. The filler extraction rate is high and it is safe and energy-saving, and is suitable for various water treatment pools that need to put fillers.

Claims (6)

1. A filler collecting device for a water treatment SIFAS system, a filler intercepting device is provided in the water treatment tank, characterized in that: a collection ditch is provided behind the filler intercepting device; the collection ditch is segmented; The front end of the aggregate ditch fits in with the filler interception device; The distance between the upper edge of the filler interception device and the liquid level in the water treatment tank is not more than 30 cm; or the distance between the upper edge of the filler interception device and the liquid level is not more than 80 cm; The rear end of the aggregate ditch is higher than the liquid level. 2. The filler collecting device for the water treatment SIFAS system as described in claim 1 is characterized in that the filler intercepting device is a cylindrical intercepting net, a plate intercepting net or a combined intercepting net. 3. The filler collecting device for the water treatment SIFAS system as described in claim 1 is characterized in that the cross-section of the aggregate ditch is U-shaped, V-shaped, rectangular or wedge-shaped with the opening facing upward, and the front end of the aggregate ditch is not higher than the upper edge of the filler interception device. 4. The filler collecting device for a water treatment SIFAS system as claimed in claim 1, characterized in that the aggregate ditch is built with building materials or formed by metal plates or plastic plates. 5. The filler collecting device for the water treatment SIFAS system as claimed in claim 1, characterized in that the upper end of the filler intercepting device is a lifting structure. 6. A method for utilizing the filler collecting device for a water treatment SIFAS system according to claim 1, characterized in that: a filler intercepting device is provided in the water treatment tank, and a collection ditch is provided behind the filler intercepting device; the front end of the collection ditch is in contact with the filler intercepting device; As the filler pool operates, water flows through the filler intercepting device, and the filler is intercepted by the filler intercepting device. The filler gathers more and more in front of the filler intercepting device and continues to climb to form a filler pile. When the height of the filler pile is higher than the upper edge of the filler intercepting device, the filler on the top of the filler pile falls into the aggregate ditch, and the filler in the aggregate ditch is collected.