CN110042907A - A kind of outdoor rain absorption oil removing inspection shaft - Google Patents

Abstract

The invention discloses an outdoor rainwater adsorption and degreasing inspection well, which is arranged before the outdoor rainwater of industrial buildings is discharged into the municipal pipe network or natural water body, and after the sedimentation well at the end of the pipe network, and is used for adsorbing and removing a small amount of grease contained in the rainwater. The drainage inspection well, after its oil removal, the oil removal rate of the effluent water is close to 100%; the bottom of the inspection well is divided into two grids with a water passing grid; the grid grooves are inserted into the grid grooves fixed to the well wall on both sides; On the side of the grid, a nylon pocket net is set between the water inlet pipe and the water passing grille, and the pocket net is filled with high-efficiency oil-absorbing cotton particles that only absorb grease and do not absorb water; The lining of the net and the lining of the water-passing grille are not less than 0.1m higher than the lining of the water inlet pipe; the net should be regularly lifted from the well, and the oil adsorbed by the high-efficiency oil-absorbing cotton is squeezed out through the extrusion equipment; the other grid of the inspection well is connected to the rainwater outlet. water pipe.

Description

An outdoor rainwater adsorption and degreasing inspection well

technical field

The invention is suitable for the field of outdoor rainwater degreasing of industrial buildings, and relates to newly-built, reconstructed or expanded outdoor rainwater containing a small amount of grease in industrial buildings for oil-water separation facilities, in particular to an outdoor rainwater adsorption and degreasing inspection well.

Background technique

Dispersed oily spots often appear on the outdoor floor of automobile dismantling workshops, machinery production and processing workshops. After rainwater washes, oily rainwater is produced. The components of oily contamination in these oily rainwater are usually water-insoluble engine oil and lubricating oil; Taking a car dismantling plant as an example, the grease content in the first-stage rainwater is about 5-15mg/L.

With the continuous improvement of environmental protection standards and requirements, national and local comprehensive sewage discharge standards have given strict regulations on the oil content of rainwater discharged into the municipal rainwater pipe network and into natural water bodies. Taking Tianjin's local standard DB12/356-2018 "Integrated Wastewater Discharge Standard" as an example, when oily rainwater is discharged into the municipal rainwater pipe network, the effluent is required to meet the secondary discharge standard (petroleum ≤ 1mg/L, animal and vegetable oils ≤ 15mg/ L) or first-class emission standard (petroleum ≤ 0.5mg/L, animal and vegetable oils ≤ 10mg/L).

Oily rainwater is characterized by a large amount of water, but a very low oil concentration. When treating oily rainwater, conventional gravity treatment methods such as demulsification, dissolved air flotation, and heated air flotation are generally used to separate oil and water. The removal rate can reach 90-98%, which can be directly discharged up to the standard, but the system is relatively complex, and the initial investment and treatment cost of the system are very high, which is obviously a big horse-drawn trolley.

SUMMARY OF THE INVENTION

In view of the above problems existing in the prior art, the purpose of the present invention is to provide an outdoor rainwater adsorption and degreasing inspection well.

In order to achieve the purpose of the present invention, the present invention provides an outdoor rainwater adsorption and degreasing inspection well. The inspection well is arranged before the outdoor rainwater of the industrial building is discharged into the municipal pipe network or natural water body, and after the sedimentation well at the end of the pipe network. Drainage inspection wells used to adsorb and remove a small amount of grease contained in rainwater,

The bottom of the inspection well is divided into two compartments by a partition, one compartment is used for the adsorption and degreasing of the water inlet end of the inspection well, which is the oil-water separation chamber; the other compartment is used for connecting the water outlet pipe, which is the clean water chamber; There is a pocket between the separator and the water inlet pipe, the pocket is filled with high-efficiency oil-absorbing cotton that only absorbs grease and does not absorb water, the bottom of the pocket is provided with a counterweight, the oil-water separation chamber is connected with a water inlet pipe, and the clean water The chamber is connected with an outlet pipe.

Wherein, the partition is a water-passing grid, and two sides of the water-passing grid are inserted into the grid grooves fixed to the well wall.

Wherein, the epithelium of the pocket is level with the epithelium of the water-passing grid; the plane size of the pocket net should be able to fill the plane of the oil-water separation chamber, and the thickness of the high-efficiency oil-absorbing cotton filling should ensure that it is flush with the epithelium of the grid; The grid epithelium is not less than 0.1m higher than the water inlet epithelium.

Wherein, the pocket is a nylon pocket net, or a water-permeable non-woven pocket, and the plane size of the pocket can fill the plane of the oil-water separation chamber.

Wherein, the counterweight is a whole piece of ceramic tile or stone that is laid on the bottom of the pocket.

Wherein, the pocket is periodically moved from the oil-water separation chamber to the outside of the inspection well, and the oil adsorbed by the high-efficiency oil-absorbing cotton is extruded through mechanical extrusion equipment.

Wherein, the high-efficiency oil-absorbing cotton is one or more of the following forms: bulk particle, pure cotton type, tube type, roll type, thin cloth type, and floor type.

Among them, the water-passing grille and the grille groove are made of stainless steel products marked as S30408, S31603 or S31608 on site; the frame of the water-passing grille is welded with 5# stainless steel channel; Stainless steel grid, the upper and lower ends are welded to the frame; the grid gap is 25mm; both sides of the water-passing grid are inserted into the 6.3# stainless steel grid groove fixed to the well wall.

Wherein, the material, size and shape of the grid frame, grid groove and grid bar are determined according to actual requirements; the material and plane shape of the inspection well are determined according to actual requirements.

Wherein, the upper end of the pocket is bound with a fixing member near the well cover with a nylon rope with a length close to the depth of the well, so as to facilitate lifting the pocket net.

Wherein, the inspection well is provided with a well cover.

Compared with the prior art, the beneficial effect of the present invention is that the invention is simple, practical, and free of secondary pollution. After oil removal, the oil removal rate of the effluent is close to 100%, which can greatly reduce the blockage probability of the subsequent advanced treatment filter equipment. ; Can be used to replace the conventional oil-water separation treatment methods such as demulsification, dissolved air flotation, and heated air flotation with high degreasing cost and initial investment.

Description of drawings

Fig. 1 shows the first schematic diagram of the structure of the embodiment of the present invention;

Fig. 2 shows the second schematic diagram of the structure of the embodiment of the present invention;

Fig. 3 shows the first schematic diagram of the structure of the water-passing grid according to the embodiment of the present invention;

Fig. 4 shows the second schematic diagram of the structure of the water-passing grid according to the embodiment of the present invention;

In the picture, 1-steel cover plate, 2-pocket, 3-grate groove, 4-water outlet pipe, 5-water grid, 6-tile, 7-water inlet pipe, 8-nylon rope, 9-fixing piece, 51 - Frame, 52- grid bars.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be noted that the "connection" described in this application and the words used to express "connection", such as "connected", "connected", etc., not only include the direct connection of a certain component with another component, but also include a certain component. One part is connected to another part through other parts.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

As shown in Figures 1-4, the present invention discloses an outdoor rainwater adsorption and degreasing inspection well, which is arranged before the outdoor rainwater of industrial buildings is discharged into the municipal pipe network or natural water body, and after the mud well at the end of the pipe network, Drainage inspection wells used to absorb and remove a small amount of oil contained in rainwater. After oil removal, the oil removal rate of the effluent is close to 100%, which can be used to replace the high cost of oil removal and initial investment. Air flotation, heating air flotation and other conventional oil-water separation treatment methods; check the bottom of the well with a water grid 5 divided into two grids; two sides of the water grid 5 are inserted into the grid grooves 3 fixed to the well wall; On the side of the grid, a nylon pocket net is set between the water inlet pipe 7 and the water passage grille 5. The pocket net is filled with high-efficiency oil-absorbing cotton particles that only absorb grease and do not absorb water; the bottom of the pocket net is tiled with a whole piece of ceramic tile or stone for weight ; The skin of the pocket net and the top of the water-passing grille 5 are higher than the top of the water inlet pipe 7 by not less than 0.1m; the pocket net needs to be regularly lifted from the well, and the oil adsorbed by the high-efficiency oil-absorbing cotton is extruded through the extrusion equipment; the other side of the inspection well Connect the rainwater outlet pipe 4.

The water inlet pipe 7 of the inspection well is connected to the water outlet pipe of the rainwater sedimentation well, and the water outlet pipe 4 of the well (which can be connected to the sampling well in series) is connected to the municipal rainwater pipe network or natural water body; this invention can be used to replace the cost of oil removal and initial investment. Higher dosage of demulsification, dissolved air flotation, heating air flotation and other conventional oil-water separation treatment methods.

The bottom of the well is divided into two grids with a water-passing grid, one of which is used for adsorption and degreasing at the inlet end of the inspection well, which is called the oil-water separation chamber; the other is used to connect the water outlet pipe, which is called the clean water chamber .

Brick wells are preferred for this well, but concrete wells or plastic wells can also be used; square wells are preferred for this well, but circular wells can also be used; In the case of wells or concrete wells, the water surface in the well is smoothed with oil-proof cement mortar.

When it is set on the green space, the manhole cover should be no less than 0.1m higher than the green space, and the light well seat and manhole cover shall be used; when it is set on the hardened ground, the manhole cover shall be level with the ground, and the heavy well seat and manhole cover shall be used; the manhole cover shall be made of steel (with Lock).

The water-passing grid 5 and the grid groove 3 are made of stainless steel products marked S30408, S31603 or S31608 on site; the frame 51 of the grid is welded with 5# stainless steel channel steel; the vertical grid bars 52 are Stainless steel grid bars, the upper and lower ends are welded to the frame; the gap between grid bars 52 is 25mm; both sides of the grid are inserted into the 6.3# stainless steel grid groove 3 fixed to the well wall; The epithelium is not less than 0.1m.

The compartment on the side of the water inlet pipe 7 (oil-water separation chamber), a nylon pocket net with a diameter of ≤ 2mm is set between the water inlet pipe 7 and the water passage grille 5. The size of the plane should be able to fill the plane of the oil-water separation chamber, and the thickness of the high-efficiency oil-absorbing cotton particles should ensure that it is flush with the epithelium of the water-passing grille 5; It is convenient to lift the bag net; the bag net needs to be regularly lifted from the well, and the oil adsorbed by the high-efficiency oil-absorbing cotton is squeezed out through the extrusion equipment; the other grid (clean water room) of the inspection well is connected to the rainwater outlet pipe 4.

High-efficiency oil-absorbing cotton is an environmentally friendly oil-absorbing material mainly composed of natural plant fibers or natural fibers (wool). , It does not absorb water, but it can absorb mineral oil, animal and vegetable oil about 30 times its own weight, three times higher than the adsorption force of polypropylene; its specific gravity is small, it can float on the water surface, and it is not easy to deform; after adsorption, it leaks less oil, which is harmful to the environment. No secondary pollution; high-efficiency oil-absorbing cotton can be degreasing by mechanical extrusion, and can be reused after degreasing.

High-efficiency oil-absorbing cotton can use natural plant fiber pure cotton products, or can use natural fiber (wool) as the main adsorption medium; high-efficiency oil-absorbing cotton is a consumable material, and after long-term use, it needs to be replaced regularly according to the use of the project.

The invention can be used for degreasing the oily rainwater outside the industrial building, and the treated rainwater can be directly discharged after reaching the standard. The high-efficiency oil-absorbing cotton medium used can be in bulk granular form, or in other forms such as pure cotton type, tube type, roll type, thin cloth type, floor type, etc. Packed with permeable non-woven fabrics; grid frames, grid grooves and grid bars are allowed to have various materials, sizes and shapes under the premise of meeting functional requirements; inspection wells are allowed to have various materials and planes under the premise of meeting functional requirements shape. The above claims shall be protected.

The above are only the preferred embodiments of the present invention. It should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. These improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (10)

1. an outdoor rainwater adsorption degreasing inspection well, it is characterized in that, described inspection well is arranged before the outdoor rainwater of industrial building is discharged into municipal pipe network or natural water body, after the silt well at the pipe network end, is used for adsorbing and removing rainwater Drain manholes containing a small amount of grease, The bottom of the inspection well is divided into two compartments by a partition, one compartment is used for the adsorption and degreasing of the water inlet end of the inspection well, which is the oil-water separation chamber; the other compartment is used for connecting the water outlet pipe, which is the clean water chamber; There is a pocket between the separator and the water inlet pipe, the pocket is filled with high-efficiency oil-absorbing cotton that only absorbs grease and does not absorb water, the bottom of the pocket is provided with a counterweight, the oil-water separation chamber is connected with a water inlet pipe, and the clean water The chamber is connected with an outlet pipe. 2 . The outdoor rainwater adsorption and degreasing inspection well according to claim 1 , wherein the separator is a water-passing grille, and two sides of the water-passing grille are inserted into grating grooves fixed to the well wall. 3 . 3. An outdoor rainwater adsorption and degreasing inspection well according to claim 2, wherein the sack epithelium and the water-passing grille epithelium are equal; The thickness of the oil-absorbing cotton should be flush with the grille epithelium, and the pocket epithelium and the water-passing grille epithelium should be no less than 0.1m higher than the water inlet pipe epithelium. 4. A kind of outdoor rainwater adsorption degreasing inspection well according to claim 1, is characterized in that, described pocket is nylon pocket net, or, is permeable non-woven fabric pocket, and the plane size of pocket can fill oil-water separation chamber plane . 5 . The outdoor rainwater adsorption and degreasing inspection well according to claim 1 , wherein the counterweight is a whole piece of ceramic tile or stone laid on the bottom of the pocket. 6 . 6. An outdoor rainwater adsorption and degreasing inspection well according to claim 1, wherein the pocket is periodically moved from the oil-water separation chamber to the outside of the inspection well, and the grease adsorbed by the high-efficiency oil-absorbing cotton is extruded through a mechanical extrusion device . 7. A kind of outdoor rainwater adsorption degreasing inspection well according to claim 1, is characterized in that, described high-efficiency oil-absorbing cotton is one or more of the following forms: bulk particle type, tube type, roll type, Thin cloth type, floor type, pure cotton type. 8. A kind of outdoor rainwater adsorption and degreasing inspection well according to claim 1, is characterized in that, described water-passing grille and grille groove are made on-site with stainless steel products marked as S30408, S31603 or S31608; The frame of the grid is made of 5# stainless steel channel steel; the vertical grid is made of Stainless steel grid, the upper and lower ends are welded to the frame; the grid gap is 25mm; both sides of the water-passing grid are inserted into the 6.3# stainless steel grid groove fixed to the well wall. 9 . The outdoor rainwater adsorption and degreasing inspection well according to claim 8 , wherein the material, size and shape of the grid frame, grid groove and grid bar are determined according to actual needs; the inspection well The material and plane shape are determined according to actual needs. 10 . The outdoor rainwater adsorption and degreasing inspection well according to claim 1 , wherein the upper end of the pocket is bound with a nylon rope with a length close to the depth of the well and a fixing member near the well cover to facilitate lifting the pocket net. 11 .