Oily wastewater treatment process

Abstract

The invention discloses an oil-containing wastewater treatment process which comprises the following steps: S1, a pretreatment stage: enabling external wastewater needing to be treated to pass through a water inlet pipe, then carrying out homogenization treatment, and carrying out primary sedimentation and aggregation on the sewage on the inner side of a wastewater collection pool when the wastewater is continuously collected; at the moment, after the centrifugal oil filter works for a period of time, oil and water with different densities are separated through centrifugal force, and meanwhile part of suspended solids and particulate matter are removed. When wastewater is continuously collected, sewage can be preliminarily settled and gathered on the inner side of the wastewater collecting pool, and is pumped into the centrifugal oil filter for centrifugal treatment after the maximum treatment capacity of the centrifugal oil filter is achieved, so that the centrifugal oil filter is in the most efficient state in each work, and energy waste caused by small-amount and multi-batch treatment is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of oily wastewater treatment, in particular to an oily wastewater treatment process. Background Art

[0002] During the production process, machining plants will generate a large amount of oily wastewater, which usually contains high concentrations of oil, emulsified oil, suspended solids and particulate matter. Although traditional treatment methods such as flotation and coagulation sedimentation can remove some pollutants, they are not effective in removing emulsified oil and tiny particles, and it is difficult to meet national emission standards. If the discharge exceeds the standard, it will pollute the environment and cause greater losses in subsequent treatment.

[0003] However, the existing oily wastewater treatment devices mostly have a slow processing speed, which requires a lot of time for wastewater treatment and is difficult to keep up with the existing manufacturing efficiency, affecting production and reducing economic benefits. In order to avoid the above technical problems, it is indeed necessary to provide an oily wastewater treatment process to overcome the above defects in the prior art. Summary of the invention

[0004] The present invention provides an oily wastewater treatment process, which can effectively solve the problem that the existing oily wastewater treatment devices mentioned in the above background technology have a slow treatment speed, which results in a large amount of time required for wastewater treatment, making it difficult to keep up with the existing manufacturing efficiency, affecting production and reducing economic benefits.

[0005] To achieve the above object, the present invention provides the following technical solution: a process for treating oily wastewater, comprising the following steps:

[0006] S1, pretreatment stage: the wastewater to be treated from outside is passed through the water inlet pipe and then homogenized. When the wastewater is continuously collected, the sewage can be initially settled and gathered inside the wastewater collection tank;

[0007] S2, centrifugal treatment stage: the centrifugal oil filter is turned on. After the centrifugal oil filter has worked for a period of time, the centrifugal force is used to separate the oil and water with different densities, and at the same time, some suspended matter and particulate matter are removed;

[0008] S3, deep treatment stage: the flow rate of the initially treated wastewater is controlled by a pressure pump so that the initially treated wastewater can slowly and fully contact the filter element inside the ceramic membrane filter;

[0009] S4, post-treatment stage: according to the pH value of the clean water tank, acid or alkali is added to adjust it appropriately, and then ultraviolet disinfection or chlorine disinfection is performed to ensure that the microbial indicators of the effluent meet the standards and meet the discharge standards;

[0010] S5. Recycling: After the wastewater is treated, it is collected in the clean water tank. The water inside the clean water tank is used to flush the entire water treatment equipment to ensure the treatment effect. At the same time, it is a water recycling and resource saving method.

[0011] Preferably, a water treatment component is installed on one end surface of the wastewater collection tank;

[0012] The water treatment assembly includes a water delivery pipe;

[0013] A centrifugal oil filter is installed on one side of the wastewater collection tank;

[0014] An oil filter bracket is installed at the bottom of the centrifugal oil filter, a waste oil end at the bottom of the centrifugal oil filter is connected to a waste oil pipe, one end of the waste oil pipe is connected to a waste oil extraction pump, and a waste oil collection tank is arranged on one side of the waste oil extraction pump;

[0015] The wastewater end of the centrifugal oil filter is connected to a water filter pipe, one end of the water filter pipe is connected to a water phase collection tank, the water outlet end of the water phase collection tank is connected to a pressure pump, the water outlet end of the pressure pump is connected to a pressure pipe, a mounting seat is provided on one side of the water phase collection tank, a fixing frame is welded to the bottom end of the mounting seat, a ceramic membrane filter is installed on the inner side of the mounting seat, and the water outlet end of the ceramic membrane filter is connected to a clean water tank.

[0016] Preferably, a water pipe is connected to one end face of the wastewater collection tank, one end of the water pipe is connected to a wastewater extraction pump, the water outlet of the wastewater extraction pump is connected to a filling pipe, and a flow control pump is installed on the outside of the water filter pipe.

[0017] Preferably, the water inlet end of the flow control pump is connected to the water filter pipe, and the water outlet end of the flow control pump is connected to the water phase collection tank.

[0018] Preferably, a plurality of the oil filter brackets are provided, and the plurality of oil filter brackets are welded at equal angles to the outside of the centrifugal oil filter, and the output end of the filling pipe is connected to the internal chamber of the centrifugal oil filter.

[0019] Preferably, two ceramic membrane filters are provided, the two ceramic membrane filters are symmetrically installed on the inner side of the mounting seat, and the two ceramic membrane filters are connected.

[0020] Preferably, the water outlet of the clean water tank is connected to an external drainage channel, and the input ends of the wastewater extraction pump, centrifugal oil filter, waste oil extraction pump, pressure pump, ceramic membrane filter and flow control pump are all electrically connected to the output end of the external controller.

[0021] Preferably, a flow assembly is installed inside the wastewater collection tank;

[0022] The flow assembly includes a water inlet pipe;

[0023] The water inlet end of the wastewater collection tank is connected to an inlet pipe, an electromagnetic control valve is sleeved on the outer side of the inlet pipe, a rotating seat is welded to one end of the inner side of the wastewater collection tank, a rotating groove is opened on the inner side of the rotating seat, a rotating rod is rotatably installed on the inner side of the rotating groove, a connecting rod is welded to the outer side of the rotating rod, a floating ball is installed at one end of the connecting rod, a pressing rod is welded to the top of the connecting rod, a proximity switch is installed on the inner wall of the wastewater collection tank, and a resistance heating rod is installed at the inner bottom position of the wastewater collection tank.

[0024] Preferably, a plurality of resistance heating rods are provided, and the plurality of resistance heating rods are equidistantly installed on the inner side of the wastewater collection tank, and the input ends of the resistance heating rods and the electromagnetic control valve are electrically connected to the output end of the external controller.

[0025] Preferably, the proximity switch is installed at a position corresponding to the inner wall of the wastewater collection tank and the pressing rod, and the output end of the proximity switch is electrically connected to the input end of the external controller.

[0026] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0027] 1. A water treatment component is provided. The wastewater to be treated is added to the inside of the wastewater collection tank, and then homogenized. When the wastewater is continuously collected, the sewage can be initially settled and gathered on the inside of the wastewater collection tank to improve the water treatment effect. After reaching the maximum processing capacity of the centrifugal oil filter, it is pumped into the centrifugal oil filter for centrifugal treatment, thereby ensuring that the centrifugal oil filter is in the most efficient state every time it works, preventing energy waste by processing a small amount of multiple batches. Then, the flow rate of the initially treated wastewater is controlled so that the initially treated wastewater can slowly and fully contact the filter element inside the ceramic membrane filter, thereby improving the filtering effect. Finally, when the wastewater is treated and gathered in the clear water tank, the water inside the clear water tank can be used to flush the entire water treatment equipment. While ensuring the treatment effect, it is a water recycling and resource saving method.

[0028] 2. A flow component is provided. External wastewater is added to the internal position of the wastewater collection tank through the water inlet pipe. The floating ball inside the wastewater collection tank is lifted upward, and the wastewater reaches the maximum processing capacity of the centrifugal oil filter. At this time, the pressing rod will trigger the proximity switch, thereby turning on the wastewater extraction pump, so that a large amount of wastewater can be transported to the internal position of the centrifugal oil filter, ensuring that the wastewater added to the centrifugal oil filter each time is sufficient, thereby ensuring the maximum processing efficiency, and in cold seasons, before adding wastewater to the centrifugal oil filter, all resistance heating rods can be turned on to heat the wastewater through the resistance heating rods, thereby ensuring the fluidity of the wastewater, and further ensuring that the wastewater can be treated stably and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0030] In the attached picture:

[0031] Figure 1 It is a schematic diagram of the process of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the water treatment component of the present invention;

[0034] Figure 4 It is a schematic diagram of the installation structure of the centrifugal oil filter of the present invention;

[0035] Figure 5 It is a schematic diagram of the installation structure of the ceramic membrane filter of the present invention;

[0036] Figure 6 It is a schematic diagram of the installation structure of the resistance heating rod of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the flow assembly of the present invention;

[0038] Numbers in the figure: 1, wastewater collection tank;

[0039] 2. Water treatment components; 201. Water pipe; 202. Wastewater extraction pump; 203. Filling pipe; 204. Centrifugal oil filter; 205. Oil filter bracket; 206. Waste oil pipe; 207. Waste oil extraction pump; 208. Waste oil collection tank; 209. Filter water pipe; 210. Water phase collection tank; 211. Pressure pump; 212. Pressure pipe; 213. Mounting seat; 214. Fixing frame; 215. Ceramic membrane filter; 216. Clean water tank; 217. Flow control pump;

[0040] 3. Flow assembly; 301. Water inlet pipe; 302. Solenoid control valve; 303. Rotating seat; 304. Rotating groove; 305. Rotating rod; 306. Connecting rod; 307. Floating ball; 308. Pressing rod; 309. Proximity switch; 310. Resistance heating rod. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0042] Example: Figure 1As shown, the present invention provides a technical solution, a process for treating oily wastewater, comprising the following steps:

[0043] S1, pretreatment stage: the wastewater to be treated from outside passes through the water inlet pipe 301, and then is homogenized. When the wastewater is continuously collected, the wastewater can be initially settled and gathered inside the wastewater collection tank 1;

[0044] S2, centrifugal treatment stage: the centrifugal oil filter 204 is turned on. After the centrifugal oil filter 204 has worked for a period of time, the centrifugal force is used to separate the oil and water with different densities, and at the same time, some suspended matter and particulate matter are removed;

[0045] S3, advanced treatment stage: the flow rate of the preliminarily treated wastewater is controlled by the pressure pump 211, so that the preliminarily treated wastewater can slowly and fully contact the filter element inside the ceramic membrane filter 215;

[0046] S4, post-treatment stage: according to the pH value of the clean water tank 216, acid or alkali is appropriately added for adjustment, and then ultraviolet disinfection or chlorine disinfection is performed to ensure that the microbial index of the effluent meets the standard and meets the discharge standard;

[0047] S5. Recycling: After the wastewater is treated, it is collected in the clean water tank 216. The water inside the clean water tank 216 is used to flush the entire water treatment equipment to ensure the treatment effect. At the same time, it is a water recycling method that saves resources and achieves multiple goals at one stroke.

[0048] like Figure 2-7 As shown, a process for treating oily wastewater, a water treatment component 2 is installed on one end surface of a wastewater collection tank 1;

[0049] The water treatment assembly 2 includes a water delivery pipe 201, a wastewater extraction pump 202, a filling pipe 203, a centrifugal oil filter 204, an oil filter support 205, a waste oil pipe 206, a waste oil extraction pump 207, a waste oil collection tank 208, a filter water pipe 209, an aqueous phase collection tank 210, a pressure pump 211, a pressure pipe 212, a mounting seat 213, a fixing frame 214, a ceramic membrane filter 215, a clean water tank 216 and a flow control pump 217;

[0050] A centrifugal oil filter 204 is installed on one side of the wastewater collection tank 1;

[0051] An oil filter bracket 205 is installed at the bottom of the centrifugal oil filter 204. There are several oil filter brackets 205, which are welded at equal angles on the outside of the centrifugal oil filter 204. The output end of the filling pipe 203 is connected to the internal chamber of the centrifugal oil filter 204, which is conducive to rapid centrifugal processing. The waste oil end at the bottom of the centrifugal oil filter 204 is connected to a waste oil pipe 206, one end of the waste oil pipe 206 is connected to a waste oil extraction pump 207, and a waste oil collection tank 208 is provided on one side of the waste oil extraction pump 207.

[0052] The wastewater end of the centrifugal oil filter 204 is connected to a water filter pipe 209, one end of the water filter pipe 209 is connected to a water phase collection tank 210, the water outlet end of the water phase collection tank 210 is connected to a pressure pump 211, the water outlet end of the pressure pump 211 is connected to a pressure pipe 212, a mounting seat 213 is provided on one side of the water phase collection tank 210, a fixing frame 214 is welded to the bottom end of the mounting seat 213, a ceramic membrane filter 215 is installed on the inner side of the mounting seat 213, two ceramic membrane filters 215 are provided, the two ceramic membrane filters 215 are symmetrically installed on the inner side of the mounting seat 213, the two ceramic membrane filters 215 are connected, which is beneficial to improving the treatment effect, and the water outlet end of the ceramic membrane filter 215 is connected to a clean water tank 216.

[0053] A water pipe 201 is connected to one end face of the wastewater collection tank 1, one end of the water pipe 201 is connected to a wastewater extraction pump 202, the water outlet of the wastewater extraction pump 202 is connected to a filling pipe 203, a flow control pump 217 is installed on the outside of the filter pipe 209, the water inlet end of the flow control pump 217 is connected to the filter pipe 209, the water outlet end of the flow control pump 217 is connected to the water phase collection tank 210, so as to facilitate the control of the flow rate, the water outlet end of the clear water tank 216 is connected to an external drainage channel, and the input ends of the wastewater extraction pump 202, the centrifugal oil filter 204, the waste oil extraction pump 207, the booster pump 211, the ceramic membrane filter 215 and the flow control pump 217 are all electrically connected to the output end of the external controller.

[0054] A flow assembly 3 is installed inside the wastewater collection tank 1;

[0055] The flow assembly 3 includes a water inlet pipe 301, an electromagnetic control valve 302, a rotating seat 303, a rotating groove 304, a rotating rod 305, a connecting rod 306, a floating ball 307, a pressing rod 308, a proximity switch 309 and a resistance heating rod 310;

[0056] The water inlet end of the wastewater collection tank 1 is connected with a water inlet pipe 301, and an electromagnetic control valve 302 is sleeved on the outer side of the water inlet pipe 301. A rotating seat 303 is welded on one end of the inner side of the wastewater collection tank 1. A rotating groove 304 is opened on the inner side of the rotating seat 303. A rotating rod 305 is rotatably installed on the inner side of the rotating groove 304. A connecting rod 306 is welded on the outer side of the rotating rod 305. A floating ball 307 is installed on one end of the connecting rod 306. A pressing rod 308 is welded on the top of the connecting rod 306. A proximity switch 30 is installed on the inner wall of the wastewater collection tank 1. 9. A proximity switch 309 is installed at a position corresponding to the inner wall of the wastewater collection tank 1 and the pressing rod 308. The output end of the proximity switch 309 is electrically connected to the input end of the external controller to facilitate flow control. A resistance heating rod 310 is installed at the bottom of the inner side of the wastewater collection tank 1. A plurality of resistance heating rods 310 are provided. The plurality of resistance heating rods 310 are equidistantly installed on the inner side of the wastewater collection tank 1 to prevent the waste oil from solidifying. The resistance heating rod 310 and the input end of the electromagnetic control valve 302 are electrically connected to the output end of the external controller.

[0057] The working principle and use process of the present invention are as follows: First, the operator can add the wastewater to be treated from the outside into the wastewater collection tank 1 through the water inlet pipe 301, and then perform homogenization treatment. When the wastewater is continuously collected, the sewage can be initially settled and gathered inside the wastewater collection tank 1;

[0058] As the wastewater increases, the maximum processing capacity of the centrifugal oil filter 204 is reached. At this time, the wastewater extraction pump 202 is turned on to extract the wastewater into the filling pipe 203 through the water pipe 201, and then the wastewater is filled into the centrifugal oil filter 204 at the top of the oil filter bracket 205 through the filling pipe 203. At the same time, the centrifugal oil filter 204 is turned on. At this time, after the centrifugal oil filter 204 has worked for a period of time, the centrifugal force is used to separate the oil and water with different densities, and at the same time, some suspended matter and particulate matter are removed;

[0059] Then, the waste oil extraction pump 207 is turned on so that the waste oil can be extracted to the inner side of the waste oil collection tank 208 through the waste oil pipe 206, and the water after preliminary separation can be pumped into the inner position of the water phase collection tank 210 through the flow control pump 217. Then, the booster pump 211 can be turned on, and then the water is injected into the inner side of the ceramic membrane filter 215 through the booster pump 211 and the booster pipe 212. At this time, the flow rate of the preliminarily treated wastewater can be controlled by the booster pump 211, so that the preliminarily treated wastewater can slowly and fully contact the filter element inside the ceramic membrane filter 215, thereby improving the filtering effect. After being filtered and treated by the ceramic membrane filter 215, the water that meets the discharge standard can flow into the clear water tank 216. According to the pH value of the effluent, acid or alkali is appropriately added for adjustment, and then ultraviolet disinfection or chlorine disinfection is performed to ensure that the microbial indicators of the effluent meet the standards and meet the discharge standards.

[0060] The wastewater to be treated is added to the wastewater collection tank 1, and then homogenized. When the wastewater is continuously collected, the sewage can be initially settled and gathered inside the wastewater collection tank 1, thereby improving the water treatment effect. After reaching the maximum treatment capacity of the centrifugal oil filter 204, the sewage is pumped into the centrifugal oil filter 204 for centrifugal treatment, thereby ensuring that the centrifugal oil filter 204 is in the most efficient state each time it works, and preventing energy from being wasted by small-scale and multi-batch treatment. Then, the flow rate of the initially treated wastewater is controlled, so that the initially treated wastewater can slowly and fully contact the filter element inside the ceramic membrane filter 215, thereby improving the filtering effect. Finally, when the wastewater is treated, it is gathered in the clean water tank 216. At this time, the water inside the clean water tank 216 can be used to flush the entire water treatment equipment to ensure the treatment effect, while recycling water and saving resources to achieve multiple goals at one stroke.

[0061] Next, during water treatment, the electromagnetic control valve 302 is opened to fill the external wastewater into the internal position of the wastewater collection tank 1 through the water inlet pipe 301. As the wastewater inside the wastewater collection tank 1 continues to increase, the floating ball 307 inside the wastewater collection tank 1 can be lifted upward. At this time, the floating ball 307 can drive the connecting rod 306 and the rotating rod 305 to rotate inside the rotating groove 304 inside the rotating seat 303, and at the same time, the connecting rod 306 will lift the pressing rod 308 upward, and after a period of time of filling, the wastewater inside the wastewater collection tank 1 will reach the centrifugal oil filter 204. The maximum processing capacity, at this time, the pressing rod 308 will trigger the proximity switch 309, so that the wastewater extraction pump 202 can be turned on, so that a large amount of wastewater can be transported to the internal position of the centrifugal oil filter 204, ensuring that the wastewater added to the centrifugal oil filter 204 each time is sufficient, thereby ensuring the maximum processing efficiency, and in cold seasons, before the wastewater is added to the centrifugal oil filter 204, all the resistance heating rods 310 can be turned on, and the wastewater is heated by the resistance heating rods 310, thereby ensuring the fluidity of the wastewater, and further ensuring that the wastewater can be stably and continuously processed.

[0062] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A process for treating oily wastewater, characterized in that: The following steps are included: S1, pretreatment stage: the wastewater to be treated from outside is passed through the water inlet pipe (301), and then homogenized. When the wastewater is continuously collected, the wastewater can be initially settled and gathered inside the wastewater collection tank (1); S2, centrifugal treatment stage: the centrifugal oil filter (204) is turned on. After the centrifugal oil filter (204) has been working for a period of time, the centrifugal force is used to separate the oil and water with different densities, and at the same time, some suspended matter and particulate matter are removed; S3, advanced treatment stage: the flow rate of the preliminarily treated wastewater is controlled by a pressure pump (211) so that the preliminarily treated wastewater can slowly and fully contact the filter element inside the ceramic membrane filter (215); S4, post-treatment stage: according to the pH value of the clean water tank (216), acid or alkali is appropriately added for adjustment, and then ultraviolet disinfection or chlorine disinfection is performed to ensure that the microbial index of the effluent meets the standard and meets the discharge standard; S5. Recycling: After the wastewater is treated, it is collected in the clean water tank (216). The water inside the clean water tank (216) is used to flush the entire water treatment equipment to ensure the treatment effect. At the same time, it is a water recycling method that saves resources and achieves multiple goals at one stroke.

2. The oily wastewater treatment process according to claim 1, characterized in that: A water treatment component (2) is installed on one end surface of the wastewater collection tank (1); The water treatment component (2) comprises a water delivery pipe (201); A centrifugal oil filter (204) is installed on one side of the wastewater collection tank (1); An oil filter bracket (205) is installed at the bottom end of the centrifugal oil filter (204); a waste oil end at the bottom end of the centrifugal oil filter (204) is connected to a waste oil pipe (206); one end of the waste oil pipe (206) is connected to a waste oil extraction pump (207); a waste oil collection tank (208) is provided on one side of the waste oil extraction pump (207); The wastewater end of the centrifugal oil filter (204) is connected to a filter pipe (209), one end of the filter pipe (209) is connected to a water phase collection tank (210), the water outlet end of the water phase collection tank (210) is connected to a pressure pump (211), the water outlet end of the pressure pump (211) is connected to a pressure pipe (212), a mounting seat (213) is provided on one side of the water phase collection tank (210), a fixing frame (214) is welded to the bottom end of the mounting seat (213), a ceramic membrane filter (215) is installed on the inner side of the mounting seat (213), and the water outlet end of the ceramic membrane filter (215) is connected to a clean water tank (216).

3. A process for treating oily wastewater according to claim 2, characterized in that: A water pipe (201) is connected to one end surface of the wastewater collection tank (1); one end of the water pipe (201) is connected to a wastewater extraction pump (202); a water outlet of the wastewater extraction pump (202) is connected to a filling pipe (203); and a flow control pump (217) is installed on the outside of the water filter pipe (209).

4. The oily wastewater treatment process according to claim 2, characterized in that: The water inlet end of the flow control pump (217) is connected to the water filter pipe (209), and the water outlet end of the flow control pump (217) is connected to the water phase collection tank (210).

5. The oily wastewater treatment process according to claim 2, characterized in that: A plurality of oil filter brackets (205) are provided, and the plurality of oil filter brackets (205) are welded at equal angles to the outside of the centrifugal oil filter (204), and the output end of the filling pipe (203) is connected to the internal chamber of the centrifugal oil filter (204).

6. The process for treating oily wastewater according to claim 2, characterized in that: Two ceramic membrane filters (215) are provided, and the two ceramic membrane filters (215) are symmetrically mounted on the inner side of the mounting seat (213), and the two ceramic membrane filters (215) are connected.

7. The oily wastewater treatment process according to claim 2, characterized in that: The water outlet of the clean water tank (216) is connected to an external drainage channel, and the input ends of the wastewater extraction pump (202), the centrifugal oil filter (204), the waste oil extraction pump (207), the booster pump (211), the ceramic membrane filter (215) and the flow control pump (217) are all electrically connected to the output end of the external controller.

8. The oily wastewater treatment process according to claim 1, characterized in that: A flow assembly (3) is installed inside the wastewater collection tank (1); The flow component (3) comprises a water inlet pipe (301); The water inlet end of the wastewater collection tank (1) is connected to a water inlet pipe (301), the outer side of the water inlet pipe (301) is sleeved with an electromagnetic control valve (302), a rotating seat (303) is welded to one end of the inner side of the wastewater collection tank (1), a rotating groove (304) is provided on the inner side of the rotating seat (303), a rotating rod (305) is rotatably mounted on the inner side of the rotating groove (304), a connecting rod (306) is welded to the outer side of the rotating rod (305), a floating ball (307) is mounted on one end of the connecting rod (306), a pressing rod (308) is welded to the top end of the connecting rod (306), a proximity switch (309) is mounted on the inner wall of the wastewater collection tank (1), and a resistance heating rod (310) is mounted at the inner bottom of the wastewater collection tank (1).

9. The oily wastewater treatment process according to claim 8, characterized in that: A plurality of resistance heating rods (310) are provided, and the plurality of resistance heating rods (310) are equidistantly installed on the inner side of the wastewater collection tank (1), and the input ends of the resistance heating rods (310) and the electromagnetic control valve (302) are both electrically connected to the output end of an external controller.

10. The oily wastewater treatment process according to claim 8, characterized in that: The proximity switch (309) is installed at a position corresponding to the inner wall of the wastewater collection tank (1) and the pressing rod (308), and the output end of the proximity switch (309) is electrically connected to the input end of the external controller.

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