CN201386031Y - Sewage oil slick isolation device - Google Patents

Abstract

A sewage floating oil isolation device relates to the technical field of design of oily sewage treatment facilities, comprising a separation tank and a water guide pipe, wherein the separation tank comprises a grit chamber, an oil separator and a water storage tank, a partition is arranged between the grit chamber, the oil separator and the water storage tank, and an inlet and outlet inclined conduit are arranged on the partition respectively. The utility model changes the design method of the oil separator inclined pipe, and provides a sewage floating oil isolation device capable of isolating and removing floating oil in sewage. After multiple tests, it is found that without adding additives for increasing oil solubility, the device can reduce the oil content of oily sewage with an oil content of 30 to 100 mg/L to below 5 mg/L, reaching the first-level emission standard of GB8978-1996, and achieving standard emission.

Description

Sewage oil slick isolation device

Technical field:

A sewage oil slick isolating device is used for effectively isolating the slick oil in sewage, and relates to the technical field of oily sewage treatment facilities.

Background technique:

Oily sewage is ubiquitous in work and life. During the use of oil-powered machinery, there are oil running, leaking, dripping, and leaking. Therefore, in daily work, oily sewage mixed with sewage is also very common. Yes, especially in the intensive cleaning of mechanical equipment, the cleaned oil and water are mixed to form a large amount of oily sewage, which will flow out of the container and pollute the environment if you are not careful; oil in sewage generally exists in three forms: oil slick, emulsified Oil and dissolved oil, among which slick oil is the main part of the oil content in oily sewage, and it is also the most serious pollution hazard. The slick oil has large dispersed particles in the wastewater, with a particle size greater than 100 μm, which is easy to separate from the sewage; if the slick If the oil is not removed, it will enter the water body to form an oil film, which will hinder the oxygen in the air from entering the water body, and the reoxygenation ability of the water body will be reduced. The fish in the water body will die due to the lack of oxygen, and the water body will turn black and smelly under anaerobic conditions. , deteriorating the water quality; places with a large amount of oily sewage are refineries, large-scale mechanical processing and manufacturing plants, large-scale catering industries, large-scale gas stations, etc. At present, these places are equipped with oily sewage treatment equipment to treat Oil slicks are collected, and the treatment effect is good; however, the oily sewage generated by the ubiquitous small machinery processing manufacturing industry, small catering industry, small gas stations, etc., has a small amount of sewage. Due to the high cost of treatment equipment, it is difficult to implement centralized equipment Therefore, at present, most of these places only have a few civil grease traps, and adopt the method of inclined pipe oil separation with low entry and high exit for storage and simple treatment. Although these methods have a certain effect on removing oil slicks in sewage, the oil slicks mainly stay in the first pool of several grease traps, and the first pool is generally used to adjust the flow of sewage and act as a buffer And sand settling effect, the area is relatively large, so the oil slick left in it is not easy to collect. When the water volume is large during the rainy season, it will easily cause the oil slick in the pool to overflow, causing serious environmental pollution.

Invention content:

The purpose of the utility model is to solve the problems in the prior art and provide a sewage oil slick isolation device which can effectively isolate the oil slick in the sewage by changing the design method of the oil slick tube.

The utility model is achieved in this way: the utility model comprises a separation tank and a water guide pipe, and is characterized in that the separation tank is a rectangular structure with a bottom surface, including a grit chamber, a grease trap and a water storage tank. Partition plates are respectively arranged between the sand tank, the grease trap and the water storage tank, and inclined conduits for water inlet and outlet are respectively arranged on the partition plates;

The water inlet inclined conduit is installed on the partition between the grit chamber and the grease trap, with the inlet end on the top and the outlet end on the bottom, with a slope of 45° to 50°;

The outlet inclined conduit is installed on the partition between the grease trap and the reservoir, the inlet end is downward, the outlet end is upward, and the slope is 45°-50°;

The two partitions respectively arranged between the grit chamber, the grease trap and the reservoir are 50-100mm higher than the partitions on the four sides;

The top surface of the inlet end of the inclined water inlet conduit is lower than the top surface of the four-sided partition of the rectangular structure, and the top surface of the inlet end of the inclined water inlet conduit is 50-100mm higher than the top surface of the outlet end of the inclined water outlet conduit;

One inlet and outlet inclined conduits can be installed respectively on the partition plates respectively arranged between the grit chamber, the grease trap and the water storage tank, or 2 to 4 inlet and outlet inclined conduits can be installed respectively;

Design a sewage oil slick isolation device according to the rectangular structure, divide the separation tank into a grit chamber, a grease trap and a water storage tank, and set up two separations higher than the four sides between the grit chamber, grease trap and water storage tank plate, and set the inlet and outlet inclined pipes on the partition to facilitate the separation of sewage and oil bottom in the isolation device;

The principle of the utility model is:

Utilizing the difference in density between oil and water, the principle is expressed as follows:

$\mathrm{<span\; class="notranslate">\; u</span>}<span\; class="notranslate">\; =</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&rho;</span>}}_{\mathrm{<span\; class="notranslate">\; r</span>}}<span\; class="notranslate">\; )</span>\mathrm{<span\; class="notranslate">\; 8</span>}\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="g\; d"\; filenames="Y2009200805070007H1.png,Y2009200805070007H2.png"\; state="\{\{state\}\}">g</figure-callout></span><figure-callout\; id="2"\; label="g\; d"\; filenames="Y2009200805070007H1.png,Y2009200805070007H2.png"\; state="\{\{state\}\}">\; </figure-callout>}{\mathrm{<span\; class="notranslate">\; </span>}}^{}{\mathrm{<span\; class="notranslate">d</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 18</span>}\mathrm{<span\; class="notranslate">\; \&mu;</span>}}$

In the formula, u-oil floating speed, m/s;

ρ _s - the density of the oil product, kg/m ³ ;

ρ _r - the density of the liquid, kg/m ³ ;

d-oil particle size, m;

μ-liquid viscosity, Pa s;

Therefore, in the oil separation tank, the oil with a relative density less than 1 floats to the surface of the tank, and connects through the bottom of the water inlet and outlet inclined conduits to achieve the final purpose of oil-water separation;

The beneficial effects of the bottom of the utility model are: after many tests, without adding additives to emulsify oil and increase oil solubility, the oily bottom sewage can be passed through the bottom device of the utility model, and the oil content can be reduced to 30-100 mg/L. The oil content of the oily sewage is reduced to below 5mg/L, and the oil content index reaches the first-level standard of the "Comprehensive Discharge Standard for Sewage" (GB8978-1996), realizing that the discharged sewage reaches the standard in terms of oil content index.

Description of drawings:

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

Fig. 2 is a top view structural diagram of the utility model.

Detailed ways:

Provide the embodiment of the present utility model below in conjunction with accompanying drawing: the present utility model comprises separating tank and aqueduct, and separating tank is a rectangular structure with bottom surface, comprises grit chamber 7, grease trap 8 and reservoir 9, Between the grit chamber 7, the grease trap 8 and the water storage tank 9, partitions 3 and 4 are respectively arranged, and on the partitions 3 and 4 are respectively provided with inlet and outlet inclined conduits 2 and 5, and the inlet and outlet inclined conduits 2 Installed on the partition plate 3 between the grit chamber 7 and the grease trap 8, the inlet end of the water inlet inclined conduit 2 is on the top, the outlet end is on the bottom, and the installation slope is 45°～50°; the outlet inclined conduit 5 is installed on On the partition plate 4 between the grease trap 8 and the water storage tank 9, the inlet end of the outlet inclined conduit 5 is downward, and the outlet end is upward, and the installation slope is 45°～50°; in the grit chamber 7, the grease trap The two partitions 3 and 4 respectively arranged between 8 and the reservoir 9 are 50-100mm higher than the partitions 1 on the four sides; The top surface of the inlet end of the water inlet inclined conduit 5 is 50-100mm higher than the top surface of the outlet end of the water outlet inclined conduit 5; A water inlet and outlet inclined conduit can be respectively installed on the dividing plates 3 and 4 respectively arranged between the pools 9, and 2 to 4 water inlet and outlet inclined conduits can also be installed respectively;

The utility model is especially suitable for places where oily sewage is produced in a small amount and oil slicks are the main source, and it is also suitable for places where oil slicks are the main source of sewage;

During use, the oily waste water is first imported into the grit chamber 7 by the pipeline, and when the height of the liquid level reaches the inlet end of the water inlet inclined conduit 5 provided, the liquid will enter the grease trap 8 through the inlet of the water inlet inclined conduit 5, which is relatively Heavy material then stays in the grit chamber 7, because what floats above is mainly oily dirt, so flow into the grease trap 8 to include oil slick and sewage, after the sewage with oil slick enters the grease trap 8, the oil slick floats Since the water inlet of the set water outlet inclined conduit 5 is downward and the water outlet is upward, the water left below overflows to the reservoir 9 through the water inlet of the set water outlet inclined conduit 5 through the inclined pipe, and floats on the The oil slick on the surface is left in the grease trap 8, and the water that finally flows into the reservoir 9 passes through the sedimentation and oil discharge of the two previous pools, and the water that reaches the standard is discharged through the outlet 6; At a certain height, the input of sewage can be temporarily stopped, and the solid matter in the sedimentation tank 7 and the grease trap 8 and the separated oil stains are removed and then the oil stain removal program is started;

The set inlet and outlet inclined conduits 2 and 5 can be pvc pipes or steel pipes, round pipes or rectangular pipes;

When making, if considering the situation of high oil content in the sewer sewage pool, the method of cascading the utility model can be adopted, and 2 to 3 devices of the utility model can be connected in series to realize the goal of multi-stage separation and removal of oil pollution, each Partial setup and installation are the same as single ones.

Claims (6)

1. a sewage oil slick disrupter comprises separate tank and aqueduct, it is characterized in that: described separate tank is a rectangular configuration that has the bottom surface, comprise settling pit, oil trap and water reservoir, between settling pit, oil trap and water reservoir, be respectively arranged with dividing plate, on described dividing plate, be respectively arranged with the oblique conduit of water-in and water-out.

2. sewage oil slick disrupter according to claim 1 is characterized in that: the oblique conduit of described water inlet is installed on the dividing plate between settling pit and the oil trap, and entrance end is last, and exit end is down, and gradient is 45 °～50 °.

3. sewage oil slick disrupter according to claim 1 is characterized in that: the oblique conduit of described water outlet is installed on the dividing plate between oil trap and the water reservoir, and entrance end is downward, exit end upwards, gradient is 45 °～50 °.

4. sewage oil slick disrupter according to claim 1 is characterized in that: two dividing plates that are provided with respectively between described settling pit, oil trap and the water reservoir are than the high 50～100mm of dividing plate on four limits.

5. sewage oil slick disrupter according to claim 1, it is characterized in that: the end face of the entrance end of the oblique conduit of water inlet of described setting is lower than the end face of rectangular configuration four side partitions, and the end face of the entrance end of the oblique conduit of intaking is than the high 50～100mm of end face of the oblique conduit outlet end of water outlet.

6. sewage oil slick disrupter according to claim 1 is characterized in that: on the dividing plate that is provided with respectively between described settling pit, oil trap and the water reservoir the oblique conduit of water-in and water-out together can be installed respectively, the oblique conduit of 2～4 road water-in and water-out also can respectively be installed.

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