CN-122003283-A - Oil-water separation and purification system and oil-water separation and purification method used by same

CN122003283ACN 122003283 ACN122003283 ACN 122003283ACN-122003283-A

Abstract

The invention relates to a system for efficiently separating mixed water from polluted water of oil and discharging water and oil by a staged oil-water separation treatment process, realizing purification, simultaneously guiding oil-water flow by a natural fall way according to the oil-water separation treatment process so as to improve the working efficiency and realize process automation, and an oil-water separation purification method using the system. The invention relates to an oil-water separation and purification system for separating and purifying water and oil mixed in oil and water, which comprises an oil-water storage tank, a supply pump, a drum screen, a scum removing device, an oil-water separator, a water-water separator, a clear water detection tank and a drain pump, wherein the oil-water storage tank is used for receiving and storing inflow oil and water, the supply pump is used for discharging and conveying the oil and water in the oil-water storage tank, the drum screen is used for receiving the oil and water from the supply pump, performing first-stage pretreatment and filtration on various sludge in the oil and water, the scum removing device is used for performing second-stage pretreatment on the oil and water subjected to preliminary filtration through the drum screen and performing bidirectional separation on residual sludge and the oil and water, the oil-water separator is used for performing bidirectional separation on the oil and water subjected to the scum after the preliminary filtration, the clear water is used for detecting turbidity of the water discharged from the oil-water separator, the drain pump is connected to the bottom of the detection tank, and the water and the oil and water in the oil and water mixture can be separated and purified mutually, and each treatment device from the drum screen is sequentially provided with a height difference, so that the water and water mixture can flow from the drum screen to the detection tank in an automatic gravity flowing mode through the drum screen.

Inventors

Cui Yinghuan

Assignees

DAESHINMC股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250317
Priority Date: 20240902

Claims (5)

1. An oil-water separation purification system, comprising: The oil-water storage tank is used for receiving and storing the inflow oil water; The supply pump is used for discharging and conveying the oil water in the oil water storage tank; A drum screen for receiving the oil-water from the feed pump and performing a first stage pretreatment filtration on various sludge therein; The scum removing device is used for carrying out second-stage pretreatment on the oil water preliminarily filtered by the rotary screen and carrying out bidirectional separation on the residual sludge and the oil water; The oil-water separator is used for carrying out bidirectional separation of water and oil on the oil water pretreated by the scum removing device and realizing purification and discharge; A detection tank for detecting turbidity of water separated and discharged from the oil-water separator, and The drainage pump is connected to the bottom of the detection groove and is used for draining the finally purified clean water into a sewer, water and oil in the oil-water mixture can be separated from each other and purified, Wherein, each processing device from the drum screen to the drainage pump is sequentially provided with height differences to form a ladder-type arrangement structure, so that the whole flowing process of oil water from the drum screen to the detection groove can be automatically guided in a natural gravity falling mode, The dross removal apparatus may include: And (3) a supporting frame: the shell body is supported by the supporting frame, is provided with oil water which enters water and scum from the lower part, and is internally provided with an inner cylinder and an outer cylinder which have double-layer structures; the oil-water input pipe penetrates into the bottom from the side surface of the shell body and is used for putting oil water in; the air dispersing generating device penetrates through the bottom of the shell body and supplies air to the inside through the annular blower; The steam pipe is arranged in the shell body and is used for thermally decomposing water and scum in the oil water; The auxiliary heating plate is arranged in the shell body and is used for reheating and decomposing the scum; The drain pipe is connected with the central inner cylinder of the shell body and used for discharging purified water after filtration and heat treatment; A slag scraping device installed at the upper part of the housing body and driven by a motor to rotate for separating and discharging slag on the surface of oil and water, and And a dross discharge port for discharging dross separated by the dross scraping means.
2. The oil-water separation and purification system according to claim 1, wherein, The trommel includes: A base frame; an inner cylinder which is arranged at the inner side of the base frame and is provided with a space for receiving the oil-water containing sludge after the filtering treatment; a rotary roller body rotatably arranged at the upper part of the inner cylinder and filtering out sludge in the oil water by utilizing centrifugal force generated by rotation; One side of the rotary spiral is provided with an oil-water suction inlet, and the rotary spiral is provided with a rotary cylinder body which rotates synchronously and is used for discharging filtered sludge forwards; The roller driving part consists of a main roller and an auxiliary roller of the rotary roller body for linkage driving; a driving motor for transmitting power to the main roller of the roller driving part, and An air nozzle installed in the inner cylinder for injecting air flow to the rotary drum body to remove residual sludge, When oil water flows in from one side of the rotary spiral, the rotary roller body rotates synchronously with the rotary spiral, the oil water flowing in through the oil water suction inlet is filtered by the rotary spiral and discharged forward, and the oil water filtered to remove the dirt is discharged to the outer periphery of the rotary roller body and is collected in the inner cylinder.
3. The oil-water separation and purification system according to claim 1, wherein, The scum removing device is provided with a scum removing device, The oil water is led into the shell body along the oil water input pipe, is decomposed into water and scum under the action of bubbles generated by the air dispersion generating device and heat generated by the steam pipe, and the floating scum is discharged to the scum discharge port through the scum scraping device with the upper rotating part, and meanwhile, the purified water with the scum removed is purified and discharged through the drain pipe.
4. The oil-water separation and purification system according to claim 1, wherein, In addition, the inner cylinder of the shell body is provided with a pipe connecting hole which is formed by penetrating through one side surface of the inner cylinder, so that the drain pipe is installed by penetrating through, and at least more than two water flow holes are formed in the bottom of the inner cylinder, which is adjacent to the bottom surface of the outer cylinder, in a vertical penetrating mode, so that water can flow out of the outer cylinder.
5. The oil-water separation and purification system according to claim 1, wherein, The oil-water separator includes: the top of the box body is provided with a cover which is in a water tank-shaped structure; the oil-water input port is arranged at one side of the box body and is used for introducing oil-water mixing water and oil; A drain port provided at a side opposite to the oil-water inlet port, for discharging water from which oil has been separated; the first partition plate is arranged in the box body and is close to the oil-water input port, and extends upwards and vertically from the bottom of the box body to a position which keeps a preset distance from the bottom surface of the box body, so that the input oil-water can flow downwards; the second partition plate is arranged in the box body and close to the water outlet, and extends upwards vertically from the bottom of the box body, so that water for separating oil can flow from the lower part to the upper part; A third partition plate arranged in the box body and close to the water outlet, and vertically arranged at a preset interval with the second partition plate, so that water rising from the lower part can flow through the third partition plate; The oil baffle plate is transversely arranged at a preset height between the first partition plate and the second partition plate; an oil discharge part mounted on one side upper end of the oil baffle plate for discharging only the floating oil, and The heating device is arranged below the oil baffle plate and is used for heating the inflowing oil water to a preset temperature, The oil drain includes: The shell is arranged at the upper end of one side of the oil baffle plate in a threaded manner; The oil discharge valve is arranged in the shell, the upper end of the oil discharge valve is of a vertical inner diameter structure, and the lower end of the oil discharge valve is of an inclined inner diameter structure; the ball trap can freely flow in the oil discharge valve according to the oil discharge amount and is used for realizing the switching operation of the valve; the anti-falling net is arranged at the lower part of the shell in an extending way and is used for preventing the ball trap from falling off; and the oil discharge pipe is used for guiding the oil to be discharged outwards through the opening and closing actions of the ball trap.

Description

Oil-water separation and purification system and oil-water separation and purification method used by same Technical Field The invention relates to an oil-water separation and purification system and an oil-water separation and purification method used by the same, which can efficiently separate and discharge water and oil by providing a staged oil-water separation treatment process in mixed polluted water containing water and oil, and realize purification. Background In general, an oil-water separator is a device for separating oil and water, which can be used for separating industrial oil produced in various machines or oily water containing animal oils discharged from households, restaurants, camping places, factories for processing animal oils and fats, and the like. If this oil-water (hereinafter, may be simply referred to as "oil-water") containing a mixture of oil and water is directly discharged without any purification treatment, it will cause serious damage to the natural ecosystem. To solve this problem, it is necessary to collect oil-water and to pretreat the collected oil-water. At present, methods for separating water and oil from oil-water containing water and oil mainly include a specific gravity separation method, a hydraulic separation method, a filtration separation method and the like. First, the gravity separation method is a method in which oil is floated on the water surface and is then scooped up and removed by an oil skimmer (OilSkimmer). For example, the gravity separation method is to allow oil-water to stand in a separation tank or to flow slowly along a plurality of baffles, and the oil floating on the water surface is collected by an oil skimmer by utilizing the difference in specific gravity between the oil and water. The gravity separation method is generally applicable to a large facility capable of realizing oil retention or slow flow such as a sewage treatment plant, and has a predetermined inconvenience in terms of maintenance and management, because it requires installation space and power for oil floatation and skimmer operation. The hydraulic separation method is a method of separating oil from water by centrifugal force and gravity by forming a predetermined flow pattern such as a vortex in a limited space. However, the hydraulic separation method adopts a manner of sucking and removing the upper layer floating oil, and thus has a fundamental limitation in that it is difficult to achieve complete oil removal. The filtration separation method is a method of trapping grease by using a filter material such as nonwoven fabric and passing water therethrough. However, when the oil content in the oil-water is high, the filtration separation method may risk leakage of grease, and it is difficult to achieve continuous treatment of the oil-water due to the need to periodically replace or clean the filter. In particular to the oil-water containing animal grease, the animal grease can be solidified in the separation process, so that the grease is difficult to separate smoothly, and simultaneously, the problems of blockage and the like caused by the solidification of the animal grease are also easy to occur at the separated and discharged part and on the inner wall of a sewer pipeline. In addition, animal grease solidified on the inner wall of the sewer pipe can be spoiled, malodor is generated, and the grease flows back along the sewer pipe, so that the secondary pollution is caused. The following describes and analyzes the prior art related to oil-water separation disclosed in recent years. The utility model No. 0432702 (oil-water separator) discloses a structure comprising a container body filled with a predetermined amount of water in an inner space, a partition plate provided inside the container body to divide the inner space into a plurality of partitions, a lower end of the partition plate being spaced apart from a bottom surface of the container body and an upper end thereof being provided above a water level so that the filled water can flow between the plurality of inner spaces, a drain portion provided on a wall surface of the container body where one of the plurality of inner spaces is located to maintain a constant water level of the filled water, an oil drain portion provided on a wall surface of the container body where the other inner space is located in the plurality of inner spaces at a position higher than the drain portion, and an oil-water mixture supply portion for supplying an oil-water mixture in which the oil and the water are mixed to a side of the inner space where the oil drain portion is provided. The above-mentioned prior art adopts the baffle structure, and the outlet that leads the water to the baffle outside discharges through the baffle, and can't cross the oil of baffle then discharges through the oil drain mouth, however, this structure is comparatively simple, and when the oil water volume of inflow sharply increases, the liquid level rises, a