CN202844699U - Bag-type filtering basin for sewage disposal by separated basin oxidation - Google Patents

Abstract

The utility model provides a bag-type filter for sub-tank oxidation cleaning, which includes a filter box body, a filter hole plate connected to a cloth bag base, a metal skeleton installed inside the cloth bag, and a fixing device connected to the metal skeleton. The water outlet, the bottom of the filter box body is provided with a water outlet, a sewage outlet, a drain outlet, an air inlet, and an aerator. The blower is connected to the air inlet through an air duct, the discharge pipe is connected to the sewage outlet and the drain outlet, and the water outlet pipe is connected to the water outlet. The patent has the advantages of energy saving and high efficiency, less investment, small floor space, simple operation, novel structure setting, reduced production cost, and improved work efficiency.

Description

A kind of pool-separated oxidation cleaning bag filter

technical field

The utility model relates to the field of filter devices in the advanced treatment process of sewage in urban sewage treatment plants, in particular to a pool-divided oxidation cleaning bag filter with low investment, high efficiency, convenient operation and small floor area. the

Background technique

Since 2010, the state has raised the water quality standard for the effluent of urban sewage treatment plants, from Class I B to Class I A. Sewage treatment plants must add corresponding process facilities to meet the requirements of effluent water quality, among which filtration process facilities must be added to meet the effluent water quality Requirements for suspended solids. Previously, sand filter tanks were generally used, and the filter media were quartz sand, anthracite, activated carbon, etc. This kind of process facility requires a large investment, covers a large area, has high filtration resistance, and low efficiency. Especially backwashing requires a lot of power and complicated operation. . the

In the past two years, rotary disc filters and filter cloth filters have begun to be used in urban sewage treatment plants. The filter media of these two filter facilities is long-staple fiber filter cloth, which has the common characteristics of high filtration efficiency, low investment, and small footprint. The backwashing device is similar to a carpet vacuum cleaner. Sweep up the filter cloth unit, the former is that the filter cloth unit rotates, and the suction pipe is stationary. The latter is that the filter cloth unit is stationary and the suction pipe moves. This type of device was widely used in coal washing plants and other places in the early days, mainly for filtering inorganic materials. In the application of urban sewage treatment plants, there will be an insurmountable problem: the reproduction and conjunctiva of microorganisms on the long-pile filter cloth. Since urban sewage treatment plants adopt biological methods, the effluent contains a small amount of organic matter and microorganisms, and the long-pile filter cloth soaked in water for a long time is easy to breed bacteria and form a bacterial film that leads to increased resistance or even failure of the filter cloth . the

The applicant has previously invented a back-blowing bag filter device [Patent No.: 201220210856.8]. and the present invention utilizes the Roots blower to inject air into the water, so that the dissolved oxygen in the water is close to saturation, at this moment, the bacteria (aerobic bacteria, facultative bacteria) are self-consumed because they cannot capture organic matter, and the water on the cloth bag The biofilm will thus fall off quickly, allowing the filter cloth to be cleaned. Experiments have proved that this method is more effective than air blowback. More energy-saving, the fan power used is only one-fifth of the former. the

Contents of the invention

The purpose of this utility model is to solve the above technical problems by adopting a cloth bag filter device and providing a long-term and effective method for cleaning the bacterial film growing on the cloth bag, so that the device can operate continuously and reliably. The bag filter, a high-efficiency device widely used in gas filtration, can be applied and promoted in water treatment, especially organic wastewater treatment, and solves the problem that similar devices cannot remove the conjunctiva of filter cloth in water. Thus forming a device suitable for upgrading and upgrading of urban sewage treatment plants and other organic wastewater treatment plants, and reliable advanced treatment of wastewater. This device has the advantages of energy saving, high efficiency, low investment, small footprint, and easy operation. the

In order to solve the above-mentioned technical problems, the sub-tank oxidation cleaning bag filter provided by the utility model is realized in this way:

A bag-type filter for sub-tank oxidation cleaning, including a filter box, a filter hole plate connected to a cloth bag base, a metal skeleton installed inside the cloth bag, a metal skeleton connected to a fixing device, a water inlet on the top of the filter, and a filter box The bottom of the body is provided with a water outlet, a sewage outlet, a drain, an air inlet, and an aerator. The blower is connected to the air inlet through an air pipe, the discharge pipe is connected to the sewage outlet and the drain, and the outlet pipe is connected to the water outlet. the

The filter tank body is a square steel structure, and the interior is divided into several small pools, and the bottom of the filter tank body is a double-layer structure. the

Each of the cloth bags is a filter unit, which adopts an external filter type, is installed vertically, and has a closed upper end. the

The cloth bag is made of special filter cloth for long-staple ionic fiber. the

Electric valves are arranged at the air inlet, water outlet, water outlet and sewage outlet. the

The beneficial effects of the utility model are that the equipment (1) selects a special filter cloth for long-staple ion fibers, and the suspended matter of the effluent water reaches the Class I A standard in the "Discharge Standards for Urban Sewage Treatment Plants" stipulated by the state, and the suspended matter content of the effluent water quality ≤15mg/L. (2) The cleaning method of the filter cloth is simple and reliable. Under the condition of high dissolved oxygen, the cleaning time of the filter cloth bacterial film is less than 5 hours, and the power consumption is 5kw·h, which is 60% more energy-saving than the air blowback type. It overcomes the bottleneck problem of traditional rotary disc filter and filter cloth filter in the application of organic wastewater treatment. (3) The cloth bag is installed vertically, which can save 80% of the floor area compared with the sand filter. (4) The construction cost of the facility is only 1/3 of the sand filter, or 1/2 of the rotary filter and filter cloth filter. More importantly, it solves the problem of cleaning the conjunctiva and bacterial film of the former filter cloth. (5) It has the advantages of energy saving and high efficiency, less investment, small floor space, simple operation, novel structure setting, reduced production cost, and improved work efficiency. the

Description of drawings

Fig. 1 is the structural representation provided by the utility model;

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

As shown in Figure 1, a bag-type filter for sub-tank oxidation cleaning includes a filter tank body 1, a filter hole plate 2 connected to a cloth bag base 3, a metal skeleton 5 is installed inside the cloth bag 4, and the metal skeleton 5 is connected to a fixing device 6. The top of the filter is provided with a water inlet 7, and the bottom of the filter tank 1 is provided with a water outlet 10, a sewage outlet 14, a drain 15, an air inlet 9, and an aerator 17. The blower 8 is connected to the air inlet 9 through an air duct 12 , the discharge pipeline 16 is connected to the sewage outlet 14 and the water outlet 15, and the water outlet pipeline 13 is connected to the water outlet 10. The filter tank body 1 is a square steel structure, and the interior is divided into several small pools. The bottom of the filter tank body 1 is a double-layer structure. Each cloth bag 4 is a filter unit, adopts external filter type, installed vertically, and the upper end is closed. The cloth bag 4 is made of long-staple ion fiber special filter cloth, and the air inlet 9, water outlet 15, water outlet 10, and sewage outlet 14 are all set. Electric valve 11 is arranged. the

The working principle of the present invention to create a bag-type filter for sub-tank oxidation and decontamination is:

(1) The filter pool is composed of several independent small pools, and each small pool is equipped with a plurality of long-staple fiber filter bags 4, and metal skeletons 5 are installed in the cloth bags 4 to form a plurality of external filter units, and the water body leaks from the outside to the inside of the bag. The suspended solids are retained by the filter cloth. the

(2) During normal operation, unload mud and clear dirt and clean cloth bags for each small pool in turn, without affecting the continuity of filtration. the

(3) When unloading mud and clearing dirt, utilize the high-pressure blower 8 to oxygenate the water body in the unit pool through the aerator 17 in the structure. Due to the limited amount of water in the pool, the dissolved oxygen in the water body rises quickly and is close to saturation. At this time, the activated aerobic bacteria, Facultative bacteria self-consume because they cannot capture enough organic matter, so that the bacterial film on the filter cloth dies and falls off, dissolves into the turbulent water and is discharged with the water to clean the filter cloth.

(4) When the sewage valve is opened, the liquid level in the pool drops, and the clear water stored in the outlet pipe automatically flows back (from the inside of the bag to the outside of the bag) to further clean up the residue remaining in the filter cloth fiber. the

The specific embodiment that the present invention creates a kind of sub-tank oxidation cleaning bag filter is:

The experimental device of the present invention has a treatment capacity of 50m ³ /h through 3 months of test operation in the sewage treatment plant of Sanmenxia City, and the operation is normal, and the following effects are achieved:

(1) Select the special filter cloth for long-staple ionic fiber, and the suspended solids of the effluent water quality shall meet the Class I A standard in the "Discharge Standards for Urban Sewage Treatment Plants" stipulated by the state, and the suspended solids content of the effluent water quality shall not exceed 15mg/L. the

(2) The cleaning method of the filter cloth is simple and reliable. Under the condition of high dissolved oxygen, the cleaning time of the filter cloth bacterial film is less than 5 hours, and the power consumption is 5kw·h, which is 60% more energy-saving than the air blowback type. It overcomes the bottleneck problem of traditional rotary disc filter and filter cloth filter in the application of organic wastewater treatment. the

(3) The cloth bag is installed vertically, which can save 80% of the floor area compared with the sand filter. the

(4) The construction cost of the facility is only 1/3 of the sand filter, or 1/2 of the rotary filter and filter cloth filter. More importantly, it solves the problem of cleaning the conjunctiva and bacterial film of the former filter cloth. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (5)

1. A bag-type filter for sub-pool oxidation cleaning, including a filter box, is characterized in that the filter orifice plate is connected to the cloth bag base, and a metal skeleton is installed inside the cloth bag, and the metal skeleton is connected with a fixing device, and the top of the filter is provided with The water inlet, the bottom of the filter box body are provided with water outlet, sewage outlet, water outlet, air inlet, aerator, the air blower is connected to the air inlet through the air pipe, the discharge pipe is connected to the sewage outlet, the drain outlet, and the water outlet pipe is connected to the water outlet. 2. according to claim 1, the separation tank oxidation cleaning bag filter is characterized in that, the filter box is a square steel structure, the interior is divided into several small pools, and the bottom of the filter box is a double layer structure. 3. The bag-type filter according to claim 1, characterized in that each of the cloth bags is a filter unit, adopts an external filter type, is vertically installed, and has a closed upper end. 4. According to claim 1 or 3, the bag-type filter tank for oxidation and decontamination according to claim 3 is characterized in that the filter cloth for long-staple ionic fibers is selected as the cloth bag. 5. The bag-type filter according to claim 1, characterized in that electric valves are provided at the air inlet, water outlet, water outlet and sewage outlet.

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