CN205294913U - Sewage removes filter equipment in advance that chlorine was used - Google Patents

Abstract

The utility model discloses a sewage removes filter equipment in advance that chlorine was used, include the casing and be equipped with the basket type filter screen except that the chlorine filter material, basket type filter screen suit is in in the casing, the casing top is provided with the upper cover on cover and still be equipped with the drain be equipped with the port on the offside lateral wall of casing respectively and install flange's inlet tube and outlet pipe still be equipped with at least one preformed hole on the lateral wall of casing, the casing bottom is equipped with the drain, this sewage removes filter equipment in advance that chlorine was used installs additional between second grade biochemical treatment unit and degree of depth processing unit, goes out its dregs that remove chlorine and flocculence of water to second grade biochemical treatment unit and filters two rehandle to protection degree of depth processing unit equipment, extension milipore filter cleaning interval reduces the membrane system backwash work frequency and then extension equipment life, lifting means operational reliability, and stably finally go out water quality of water.

Description

Pre-filter device for dechlorination of sewage

technical field

The utility model relates to the technical field of sewage treatment, in particular to a pre-filter device for dechlorinating sewage.

Background technique

At present, the treatment process of the characteristic sewage treatment facilities in the port area is generally divided into two parts, one part is the secondary biochemical treatment unit, followed by the advanced treatment unit. The main process of secondary biochemical treatment is "swirling sand sedimentation + advection sedimentation + A/O reaction tank + membrane biological reaction tank", which mainly removes pollutants through biochemical processes. The process of the advanced treatment part is "ultrafiltration + reverse osmosis", which mainly removes pollutants through physical filtration. The effluent standard of the advanced treatment system meets the first-class A standard stipulated in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB/T18918-2002).

However, the process flow of the current secondary biochemical treatment unit needs to add chlorine-containing disinfection preparations, and the effluent quality often contains too much chlorine, sometimes even greater than 500mg/m ³ The removal efficiency is not high, which will lead to the problem that the chlorine content in the water body still exceeds the standard after water treatment; in addition, due to the biochemical reaction in the secondary biochemical treatment unit, the effluent contains a certain amount of flocculated dregs, and The ultrafiltration membrane material of the advanced treatment unit is relatively delicate. After a period of water treatment, the ultrafiltration membrane of the advanced treatment unit will be clogged, thereby shortening the cleaning cycle of the ultrafiltration membrane. For a long time, the membrane system of the advanced treatment unit has been backwashed Excessive working frequency leads to shortening of its service life, and the reliability of the equipment and the quality of the final effluent water cannot be guaranteed.

Utility model content

The purpose of this utility model is to provide a kind of additionally installed between the secondary biochemical treatment unit and the advanced treatment unit of the sewage treatment system in the port area, so as to realize the residue filtration before entering the advanced treatment unit and overcome the existing water content after the current water treatment. A pre-filter device for dechlorination of sewage with excessive chlorine content.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A pre-filter device for dechlorinating sewage, comprising a shell and a basket-type filter screen equipped with a dechlorinating filter material, wherein:

The basket-type filter screen is set in the housing, and an annular space is formed between the outer wall of the basket-type filter screen and the inner wall of the housing, and a space is left between the bottom of the housing;

Among them, the material of the filter screen is preferably made of stainless steel 316L, which is easy to install and maintain; the shell is preferably made of polypropylene (PP) plastic material, which is light and corrosion-resistant.

Preferably, the mesh number of the basket filter is 100-200 mesh.

Preferably, the bottom surface of the housing is flat.

An upper cover is provided on the top of the housing, and the upper cover is connected to one side of the housing by bolts, and a vent opening with an inner diameter of 11-21 mm is also provided on the upper cover;

A water inlet pipe and a water outlet pipe are respectively provided on the opposite side walls of the housing, the diameter of the water inlet pipe is larger than the diameter of the water outlet pipe, and the outlet ends of the water inlet pipe and the water outlet pipe are both A connecting flange is installed to connect the outlet pipe of the secondary biochemical treatment unit and the water inlet pipe of the advanced treatment unit respectively;

At least one reserved hole is also provided on the side wall of the housing, and the reserved hole can be used as a visual hole to observe the processing conditions in the pretreatment device, or as an instrument socket for inserting instruments such as a pH meter The detection rod is used to monitor the water treatment status in real time;

A sewage outlet is provided at the bottom of the housing, and an on-off valve is provided at the sewage outlet. The bottom of the housing is also provided with a support frame.

The pre-filter device for dechlorination of sewage adopts the configuration design of basket type, straight-through type and flat bottom, which can maximize the flow rate, reduce the pressure loss of the filter, and facilitate installation, maintenance, slag removal and replacement.

The pre-filtration device for dechlorination of sewage is installed between the secondary biochemical treatment unit and the advanced treatment unit, and the effluent of the secondary biochemical treatment unit is subjected to dual treatment of chlorine removal and flocculated dregs filtration to protect the equipment of the advanced treatment unit , prolong the cleaning cycle of the ultrafiltration membrane, reduce the backwashing frequency of the membrane system, thereby prolonging the service life of the equipment, improving the reliability of the equipment operation, and stabilizing the final effluent water quality.

Description of drawings

Fig. 1 is the structure diagram of the pre-filter device used for dechlorinating sewage of the present utility model.

detailed description

The above-mentioned content of the utility model of the utility model will be further described in detail below in conjunction with specific embodiments. However, it should not be understood that the scope of the above subject matter of the present utility model is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present utility model, various replacements and changes made according to common technical knowledge and conventional means in the art shall be included in the scope of the present utility model.

As shown in Figure 1, the pre-filter device used for dechlorination of sewage comprises a housing 1 made of polypropylene and a basket-type filter screen 2 equipped with a dechlorination filter material. The bottom of the housing 1 is provided with a support frame 9 wherein:

The basket-type filter screen 2 is set in the housing 1, and an annular space is formed between the outer wall of the basket-type filter screen 2 and the inner wall of the housing 1, and an annular space is formed between the bottom of the housing 1 and the bottom of the housing 1. have space;

The basket-type filter screen 2 is made of stainless steel 316L, and its mesh number is 100 mesh. The chlorine-removing filter material in the basket-type filter screen 2 includes chlorine sheets and auxiliary materials, the chlorine sheet is calcium sulfite, and the auxiliary materials are super Polyethylene and activated carbon;

The top of the housing 1 is provided with an upper cover 4, the upper cover 4 and one side of the housing 1 are connected as a whole by bolts 8, and the other side of the upper cover 4 partially extends outward horizontally to form a convex The opening and closing of the upper cover 4 is convenient. The upper cover 4 is also provided with a vent 5. The specifications of the vent 5 are DN25 and PN16, that is, the inner diameter of the vent 5 is 21 mm, and the wall thickness is 2 mm. Water pressure 1.6MPa.G;

A water inlet pipe 3 and a water outlet pipe 7 are respectively arranged on the opposite side wall of the housing 1, the pipe diameter of the water inlet pipe 3 is 80mm, and the diameter of the water outlet pipe 7 is 50mm, and in the water inlet pipe 3 and the outlet end of the outlet pipe 7 are equipped with connecting flanges for respectively connecting the outlet pipe of the secondary biochemical treatment unit and the water inlet pipe of the advanced treatment unit;

A first reserved hole 101 and a second reserved hole 102 are also provided on the side wall of the housing 1, and a transparent plate is provided on the first reserved hole 101 as a visual hole to observe the pretreatment device The internal treatment status, the second reserved hole 102 is an instrument jack, which is used to insert the detection rod of the pH meter and other instruments, and monitor the water treatment status in real time;

A sewage outlet 6 with a valve is provided at the bottom of the housing 1. After the water treatment is completed, the sewage outlet 6 is opened to discharge the flocculated dregs deposited on the bottom of the housing 1 out of the housing.

Use the pre-filter device for dechlorination ^of sewage to pre-treat the effluent of the secondary biochemical treatment unit. The chlorine content in the treated sewage meets the discharge standard, and the flocculated dregs in the water will not enter the advanced treatment unit after treatment, which avoids damage to the ultrafiltration membrane material in the advanced treatment unit, prolongs its service life, and improves the quality of the effluent. Stablize.

Claims (5)

1. a kind of pre-filter device that sewage dechlorination is used, it is characterized in that, comprise housing (1) and the carrying basket type strainer (2) that dechlorination filter material is housed, described carrying basket type strainer (2) is set in place In the housing (1), and an annular space is formed between the outer wall of the basket filter (2) and the inner wall of the housing (1), and there is a space between the bottom of the housing (1) , the top of the housing (1) is provided with an upper cover (4), and the upper cover (4) is also provided with a vent opening (5) with an inner diameter of 11-21mm, and on the housing (1) Water inlet pipes (3) and outlet pipes (7) are respectively arranged on the opposite side walls, and connecting flanges are installed on the outlet ends of the water inlet pipes (3) and the outlet pipes (7). At least one reserved hole (10) is also provided on the side wall of the housing (1), and a sewage outlet (6) is provided at the bottom of the housing (1). 2. A pre-filter device for dechlorinating sewage according to claim 1, characterized in that the upper cover (4) is connected to one side of the housing (1) by bolts (8). 3. A pre-filter device for dechlorinating sewage according to claim 1, characterized in that the mesh number of the basket filter (2) is 100-200 mesh. 4. A pre-filter device for dechlorinating sewage according to claim 1, characterized in that the diameter of the water inlet pipe (3) is larger than that of the water outlet pipe (7). 5. A pre-filter device for dechlorinating sewage according to claim 1, characterized in that a support frame (9) is provided at the bottom of the housing (1).