CN115849537A - Treatment process of oily heavy metal industrial wastewater - Google Patents

Abstract

The invention relates to the field of water treatment, in particular to a treatment process for industrial wastewater containing oil and heavy metals, comprising a box body on which a cleaning device is installed, the cleaning device includes a mounting frame and an air extraction device, and a suction nozzle is movably installed in the mounting frame, Pipe 1 is fixedly installed on the top of the suction nozzle, and the suction device includes pipe 2. One end of pipe 2 is fixedly connected to pipe 1, and the other end is fixedly connected to the suction pump. Both ends of pipe 1 are fixedly connected to suction nozzle and pipe 2 respectively. A drive device for moving the suction nozzle is fixedly installed on the top, the drive device includes two lead screws, and the two lead screws are rotatably installed on the mounting frame, and the axial direction of the lead screw is parallel to the long side of the mounting frame. The invention extracts the scum from the oily heavy metal waste liquid by setting a cleaning device, prevents the air flotation machine from contacting the scum when removing the scum, destroys the combination of air bubbles and flocs, and makes the flocs sink to the water. Reduce the purification effect of oily heavy metal wastewater.

Description

A treatment process for oily heavy metal industrial wastewater

technical field

The invention relates to the field of water treatment, in particular to a treatment process for industrial wastewater containing oily heavy metals.

Background technique

In the fields of mechanical processing, mining, metal smelting and electroplating, a large amount of oily heavy metal wastewater will be produced. The heavy metals in these waste liquids are toxic. If the heavy metal pollutants are directly discharged, they will be released in the atmosphere, water, sediment, soil and other environments. In my country, the land contaminated by heavy metals has reached tens of millions of square hectares. Under the influence of heavy metal pollution in the soil, health problems caused by heavy metal pollution have been frequently reported in recent years, and all of them are ringing the alarm bells to warn that the current heavy metal pollution The impact of soil pollution is constantly expanding, so the prevention and treatment of heavy metal wastewater is very important.

In the existing technology, the treatment methods for oily heavy metals mainly include chemical treatment, physical treatment and mixed chemical and physical treatment. At present, the treatment of oily heavy metal wastewater is mostly the air flotation machine treatment of comprehensive chemical and physical methods. The flocculant and coagulant are added into the air flotation machine, and the coagulant is used to flocculate the suspended matter and oil, and the flocculant is used to adsorb and connect the small particles formed by the coagulant to each other, thus forming large particles that are quickly separated from the water. Then the dissolved air system of the air flotation machine releases tiny bubbles in the bonding area of the air flotation machine. These tiny bubbles attach to the flocs and make the flocs float up. Coagulants and flocculants make the oil and heavy metals in the oily heavy metal wastewater flocculate to form flocs. The air bubbles are used to float the flocs, and then the scrapers are used to scrape and clean the floating flocs and scum to realize the purification of oily heavy metals. , but in the existing air flotation machine, the scum is cleaned by using the rolling scraper to scrape away the scum. This method needs to accurately control the scraping frequency and scraping speed of the scraper. The frequency of scraping is adjusted infrequently, and the formation speed of scum will change continuously according to the content of fine particles in the oily heavy metal waste liquid. If the frequency of scraping is lower than the formation speed of scum, more scum thickness will be Thickened, the thickened scum has less water content, and the scum with reduced water content is scraped into the sludge tank, and then the scum is transported to the scum treatment device through the transmission device to treat the scum, and the scraper plate When scraping the scum, it needs to be in contact with the scum that has not yet come out of the water. At this time, the scraper will break the tiny air bubbles on the flocs, and the flocs will continue to sink into the water without the buoyancy of the air bubbles. After the water content is reduced, the drier scum will block the transmission device. If the scraping frequency is too fast, this requires the scraper to move faster. If the scraper moves too fast, it will increase the force on the scum , which makes it easier to destroy the scum and reduce the effect of wastewater purification.

For this reason, in order to prevent the scum from being contacted and damaged during the scum cleaning, and the flocs settling into the water to affect the water purification effect, a treatment process for industrial wastewater containing oily heavy metals is proposed.

Contents of the invention

The purpose of the present invention is to provide a treatment process for industrial wastewater containing oily heavy metals. By setting up an air extraction device and a suction nozzle, the scum is cleaned without contact with the scum.

To solve the problems raised in the background technology above.

To achieve the above object, the present invention provides the following technical solutions:

A treatment process for oily heavy metal industrial wastewater, comprising the following steps:

S1: Oily heavy metal wastewater enters the sewage reaction zone of the tank, and flocculant (PAC) and coagulant aid (PAM) are added in the reaction zone, and the flocculant (PAC) and coagulant aid (PAM) make the oily heavy metal wastewater fine Particles combine to form larger flocs;

S2: Start the air-dissolving device to combine micro-bubbles with flocs, and start to treat oily and heavy metal wastewater;

S3: The scum rises to the liquid level, the rising of the scum triggers the detection device, and the detection device controls the cleaning device to start;

S4: The floating scum is pumped to the sludge tank through the cleaning device;

S5: At the end of the wastewater treatment, start the lifting device, the lifting device controls the cleaning device to descend and absorb water, the water flow is pumped to the sludge pool through the cleaning device, and the cleaning device is cleaned under the action of the water flow. The cleaning device includes a mounting frame and an air extraction device, a suction nozzle is movable installed in the mounting frame, a pipe 1 is threadedly connected to the top of the suction nozzle, and the air extraction device includes a pipe 2, one end of the pipe 2 is fixedly connected to the pipe 1, and the other end is connected to the air pump Fixedly connected, the two ends of the first pipe are threadedly connected with the suction nozzle and the second pipe respectively, the second pipe is connected with an air extraction device, and the driving device for moving the suction nozzle is fixedly installed on the mounting frame, and the flocs and tiny The air bubbles combine under the box, and the flocs float up to the liquid surface under the action of the buoyancy of the tiny air bubbles, and a large number of flocs float up and accumulate on the liquid surface to form scum. At this time, the suction nozzle installed in the installation frame above the liquid surface is The scum is extracted under the action of the air extraction device, and the scum on the liquid surface can be cleaned without touching the scum when using the suction nozzle and the air extraction device to prevent the scum from being cleaned. When it comes into contact with scum, the bubbles of the scum burst and the flocs continue to sink into the water, which leads to the problem of poor removal effect of oily heavy metal wastewater.

In the present invention, the air pumping device can use the compressed gas system to extract the scum under the negative pressure generated when the compressed gas is released. The suction force generated by the system is relatively large, but the system has higher cost and complex structure, so the air pump and Pipe two can save cost as the air extraction device of the present invention and has a simple structure.

Preferably, the driving device includes two lead screws, the two lead screws are rotatably mounted on the mounting frame, and the axial direction is parallel to the long side of the mounting frame, ball nuts are installed on the two lead screws, A fixing plate is fixedly installed under the ball nut, and a hole is opened on the fixing plate, and the tube one passes through the hole, and a support rod one is slidably installed on both sides of the fixing plate, and one end of the support rod one is connected with the suction The nozzles are threaded, and the two lead screws are connected to the motor through the timing belt. When the suction nozzle cleans up the scum, the motor is started, and the lead screw is rotated through the timing belt. Through the rotation of the lead screw, the ball nut is on the wire The bar moves left and right, the fixed plate connected to the ball nut through the thread moves synchronously with the ball nut, and the suction nozzle connected to the fixed plate through the support rod moves left and right with the fixed plate, and the scum is continuously generated on the liquid surface, and The scum does not flow, and the suction nozzle moves left and right through the driving device to reciprocate and clean the scum, so as to realize the uniform and complete cleaning of the scum.

At the same time, the driving device of this program can also choose belt transmission or chain transmission. By installing a fixed plate on the belt or chain, the suction nozzle installed on the fixed plate can move left and right with the movement of the belt or chain, but the belt and the chain The chain will be stretched and deformed, which will reduce the transmission effect, and the drop of the suction nozzle will cause the destruction of scum. Therefore, the ball nut screw drive is the optimal solution in the present invention.

Preferably, the fixed plate is connected with the suction nozzle through a lifting mechanism, and the lifting mechanism is used to move the suction nozzle up and down. The lifting mechanism includes a rack threaded on the support rod one, and the rack The gear is meshed, the gear is connected to the rotating shaft through a key, and the rotating shaft is rotated and installed on the second motor through a coupling. During the process of extracting the scum by the suction nozzle and the suction device, the scum will be adsorbed on the suction On the inner wall of the nozzle and the inner wall of tube 1 and tube 2, if this part of scum is not cleaned up, the scum will continue to accumulate, causing the wall thickness of the suction nozzle, tube 1 and tube 2 to increase, resulting in a decrease in the ventilation rate that cannot reach the effective level. The scum pumping effect, by setting the lifting mechanism, when the scum is cleaned, the motor 2 is started to rotate the gear, the rotation of the gear makes the rack move downward, and the support rod 1 threaded with the rack makes the suction nozzle downward Movement, so that the suction nozzle is located under the liquid surface, and the purified water enters the suction nozzle and flows through the pipe 1 and pipe 2 to the scum collection place under the action of the suction device, and is adsorbed on the scum on the inner walls of the suction nozzle, pipe 1 and pipe 2 The slag is washed away under the action of the water flow, and the cleaning effect of the suction nozzle, the inner wall of the first pipe and the second pipe is realized.

In the present invention, the lifting mechanism can also use the cylinder to lift the suction nozzle. The output force and movement speed of the cylinder are relatively easy to adjust, but in the present invention, the requirements for the lifting force and speed are not high, and the cylinder needs to be connected externally. The air pipe can realize the function of lifting, and the complexity of the mechanism increases, so in the present invention, the use of motor two and the rack and pinion as the lifting mechanism can make the overall structure of the invention simple, and the service life of the rack and pinion is long, which can better realize The lifting function of the suction nozzle.

Preferably, the suction nozzle is connected to the liquid level in the tank through a floating device, and the distance between the suction nozzle and the scum is controlled by setting the floating device to ensure that there is a certain distance between the suction nozzle and the scum, and when the water level in the tank changes, preventing The suction nozzle is too far away from the scum to achieve the extraction effect, and it also prevents the suction nozzle from being too close to the scum to cause damage to the scum, causing the flocs to settle into the purified water, and the purification effect of the oily heavy metal wastewater cannot be achieved.

Preferably, the floating device includes a floating plate 2, the floating plate 2 is installed in the gap between the buoyancy switch and the side wall of the box, the two ends of the suction nozzle are threadedly connected with the support rod 2, and the support rod The lower end of the second floating plate is rotatably equipped with rollers, which roll on the second floating plate. The second floating plate floats on the liquid surface by buoyancy. The rolling roller will also change in height with the change of water level. The support rod two threaded at both ends of the suction nozzle is connected with the roller through bearings. The distance between the floating plate 2 and the scum can be automatically adjusted under the action of the floating plate 2, because the floating plate 2, support rods and rollers are simple and durable parts with long service life and timely response, so they are very suitable for this equipment as a floating device.

At the same time, as a floating device, a photoelectric liquid level sensor, motor 2 and support rod 1 can also be used as a floating device, and the height of the water level can be measured by the photoelectric liquid level sensor, and the distance between the suction nozzle and the scum can be determined by controlling the motor 2 to drive the support rod 1 up and down. Control, the use of photoelectric liquid level sensors can make the structure of the floating device more compact, more convenient to install, and can measure very few liquids, but its disadvantages are also obvious because the sensor needs to be in contact with the liquid and needs to be connected to the power supply, and the oily metal wastewater The flocs will be adsorbed on the prism of the photoelectric liquid level sensor, resulting in inaccurate measurement, resulting in poor adjustment of the distance between the suction nozzle and the scum. Therefore, it is better to use the second floating plate and the second support rod as the floating device in the present invention. .

Preferably, the first inclined guide plate is threaded on the inner wall of the box, the second inclined guide plate is installed above the inclined guide plate, the lower end of the second inclined guide plate is lower than the upper end of the first inclined guide plate, the upper end of the second inclined guide plate is connected The end surface of the body is even, and when the flocs and micro-bubbles are combined at the bottom of the box, they float vertically upward to the liquid surface. The second inclined guide plate is made of light-weight and anti-corrosion PP material. The second inclined guide plate makes the flocs on the edge of the box move to the middle of the box through the guiding effect of the inclined guide plate when they float up, and the flocs on the edge of the box are collected in the middle of the box through the action of the inclined guide plate, which can When absorbing the scum, the suction nozzle can completely cover the scum, so as to realize the complete cleaning of the scum, and no scum will remain on the inner wall of the box.

Preferably, the top of the inclined guide plate 2 is threaded with a floating plate 1, and the two ends of the floating plate 1 are threaded with a guide plate, and the guide plate is slidably installed on the box body, and the edge of the box body is floated by setting the floating plate 1 The flocs gather in the first floating plate, and the scum will not float above the liquid surface under the restriction of the first floating plate, and the first floating plate floats on the water surface, and can follow the change of the inclined guide plate two when the water level of the oily metal wastewater changes The position is changed through the floating plate 1 and the inclined guide plate 2 can be changed according to the change of the liquid level. When the suction nozzle lifts the scum, the guide plate 2 will not block the stroke of the suction nozzle.

Preferably, a guide post is fixedly installed on the upper end of the floating plate, and a buoyancy switch is installed inside the guide post. The amount of scum generated is changed by the floc content in the oily metal waste liquid. When the amount of scum generated is large , in order to ensure the removal effect of scum, the moving speed of the suction nozzle is required to be faster, and the wind force of the draft is stronger. By setting the guide post on the upper end of the floating plate 1, the guide post is connected with the floating plate 1, and the scum passes through the floating plate. Once entering the guide column, by setting the buoyancy switch in the guide column, when there are more flocs in the oily heavy metal waste liquid, more scum will be generated, and the scum will make the buoyancy switch float up, and the distance from the liquid surface will be detected by the buoyancy switch Control the exhaust device and the driving device to increase the power to meet the requirements of scum extraction. When the flocs in the oily metal waste liquid are less, the amount of scum generated is less, and the height between the scum and the liquid surface decreases, and the buoyancy The switch is lowered to control the suction device and the buoyancy device to reduce the power, so as to achieve the effect of energy saving.

Preferably, the suction nozzle is made of light and corrosion-resistant materials. Since the distance between the suction nozzle and the scum is controlled by buoyancy, and the oily metal waste liquid is corrosive, the material of the suction nozzle is required to have light weight and corrosion resistance. , so the material selected is PP plastic, the density of PP material is only 0.9, and it has strong corrosion resistance, which meets the requirements of the equipment.

Preferably, a one-way valve is installed at the connection between the pipe one and the suction nozzle. When the extraction device completes the adsorption of scum and shuts down, the scum adsorbed on the pipe one loses the effect of wind force, and under the action of gravity It will drop down and fall into the box, causing pollution to the box and affecting the purification of the metal in the oil by the air flotation machine next time. Prevents scum from falling out.

Compared with prior art, the beneficial effect of the present invention is:

1, a kind of treatment process of oily heavy metal industrial wastewater according to the present invention, by installing cleaning device on the mounting frame, the scum in the oily heavy metal waste liquid is extracted without contact, preventing the air flotation machine from interacting with the scum when removing the scum The contact of scum destroys the combination of air bubbles and flocs, causing the flocs to settle underwater, resulting in poor purification effect of oily heavy metal waste liquid.

2. According to the treatment process of a kind of oily heavy metal industrial wastewater according to the present invention, the distance between the suction nozzle and the scum can be adjusted according to the water level by setting the floating plate 1 and the floating plate 2 without additional power, so as to ensure that the suction nozzle is moving While not touching the scum during the process, the distance between the suction nozzle and the scum can be maintained to ensure the effect of removing the scum.

3. In the treatment process of a kind of oil-containing heavy metal industrial wastewater according to the present invention, a guide post is arranged on the floating plate and a buoyancy switch is installed in the guide post, and the moving speed of the suction nozzle is adjusted by the buoyancy switch. Increase the moving speed for a long time, reduce the moving speed when there is less scum, and change the moving speed of the suction nozzle to ensure the cleaning effect of scum and the effect of saving energy.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a sectional view of the present invention;

Fig. 3 is a partial enlarged view of place A in Fig. 2 of the present invention;

Fig. 4 is a partial sectional view of the present invention;

Fig. 5 is the top view of the present invention:

Fig. 6 is a sectional view of the present invention;

Fig. 7 is the left view of the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 2 of the present invention.

In the figure: 1. Box body; 2. Mounting frame; 3. Suction nozzle; 4. Pipe one; 5. Pipe two; 6. Lead screw; 7. Ball nut; 8. Fixed plate; 9. Support rod one; 10 1, motor one; 12, inclined guide plate one; 13, inclined guide plate two; 14, floating plate one; 15, floating plate two; 16, guide post; 17, buoyancy switch; 18, support rod two; Check valve; 21, motor two; 22, rack; 23, scum; 24, protective cover; 25, guide plate.

Detailed ways

Embodiment 1, as shown in Figures 1 to 8, in this embodiment, the air flotation machine is installed indoors, and the scum is not affected by the external environment, as follows:

A treatment process for oily heavy metal industrial wastewater, comprising a box body 1, a cleaning device is threadedly connected to the box body 1, the cleaning device includes a mounting frame 2 and an air extraction device, and a suction nozzle 3 is movable installed in the mounting frame 2, and the suction nozzle 3 The top is threadedly connected with pipe one 4, and the two ends of pipe one 4 are threadedly connected with suction nozzle 3 and pipe two 5 respectively, and pipe two 5 is connected with an air extraction device, the air extraction device includes an air pump, and one end of the air pump is connected to the sludge pool, The other end is connected to the pipe 2 5, and the mounting frame 2 is fixedly installed with a driving device for making the suction nozzle 3 move. The driving device includes two leading screws 6, and the two leading screws 6 are rotatably mounted on the mounting frame 2, and the axial direction Parallel to the long side of the installation frame 2, ball nuts 7 are installed on the two lead screws 6, and a fixed plate 8 is fixedly installed under the ball nuts 7, and a hole is opened on the fixed plate 8, and the tube one 4 passes through the hole, and the fixed plate 8 Support rod one 9 is slidingly installed on both sides, and one end of support rod one 9 is threadedly connected with the suction nozzle 3, and the fixed plate 8 is connected with the suction nozzle 3 through a lifting mechanism. The lifting mechanism is used to realize the up and down movement of the suction nozzle 3. It includes a rack 22 threaded on the support rod 9, a gear is engaged on the rack 22, the gear is connected to the rotating shaft through a key, and the rotating shaft is installed on the motor 2 21 through a coupling, and the suction nozzle 3 is connected to the motor 2 through a floating device. The liquid level connection in the box body 1, the floating device includes a floating plate 2 15, and the floating plate 2 15 is installed in the gap between the buoyancy switch 17 and the side wall of the box body 1, and the two ends of the suction nozzle 3 are threadedly connected with the support rod 2 18. The lower end of the support rod 2 18 is rotated with a roller 19, and the roller 19 rolls on the floating plate 15. The inner wall of the box body 1 is threaded with a slanted guide plate 1 12, and the slanted guide plate 13 is installed above the slanted guide plate. The lower end of 13 is lower than the upper end of inclined guide plate one 12, the upper end of inclined guide plate two 13 is flush with the end face of casing 1, the top of inclined guide plate two 13 is threaded with floating plate one 14, and the two ends of floating plate one 14 are threadedly connected with guide plate, The guide plate is slidably installed on the casing 1, the upper end of the floating plate 14 is fixedly equipped with a guide post 16, the inside of the guide post 16 is equipped with a buoyancy switch 17, and the joint of the pipe one 4 and the suction nozzle 3 is equipped with a one-way valve 20.

Specific workflow.

When working, the oily heavy metal wastewater to be treated passes through the delivery pipe, adjusts the PH in the delivery pipe, and then enters the reaction zone in the air flotation machine, and adds flocculant (PAC) and coagulant (PAM) in the reaction zone to make the oily heavy metal waste liquid The fine particles in the water condense into large flocs, and the flocs and water enter the contact area, and the dissolved air system absorbs on the flocs through the tiny air bubbles generated by the releaser, and enters the separation area in the box 1 together. The inner flocs rise vertically, and the inclined guide plate 12 and inclined guide plate 2 13 installed in the box body 1 make the flocs move obliquely upwards, and collect the scum 23 in the middle of the box body 1, and the scum 23 is on the floating plate 14 The accumulated scum 23 makes the buoyancy switch 17 move upwards. When the buoyancy switch 17 moves upwards, the motor one 10 and the air extraction device are controlled to start. The motor one 10 drives the lead screw 6, so that the balls installed on the lead screw 6 When the nut 7 moves, the fixed plate 8 installed on the ball nut 7 also moves, and the suction nozzle 3 connected to the fixed plate 8 through the support rod 9 also moves, and the scum 23 is fully cleaned by the movement of the suction nozzle 3. The air suction system makes the scum 23 enter from the suction nozzle 3, and the scum 23 enters the scum 23 treatment device through the first pipe 4 and the second pipe 5. When the distance between the upper surface of the scum 23 and the liquid surface changes by 0.5cm , buoyancy switch 17 controls motor one 10 rotating speed to change 500r/min, the airflow wind speed of control suction device increases or decreases 5m/s, when suction nozzle 3 moves, is supported on floating plate two 15 by support bar two 18 and roller 19, Utilize the buoyancy of the floating plate 2 15 as the supporting force of the suction nozzle 3, keep the suction nozzle 3 and the scum 23 at a distance of 1 cm, prevent the suction nozzle 3 from causing damage to the scum 23 and make the flocs drop, when the oily metal waste liquid enters When the amount of the separation area in the box body 1 decreases, the liquid level in the box body 1 drops, and the floating plate two 15 and the floating plate one 14 both drop to ensure that the distance between the suction nozzle 3 and the scum 23 is always maintained at 1 cm. When the equipment is completed After cleaning the scum 23, turn off the motor one 10, and turn on the motor two 21 at the same time, the suction nozzle 3 moves down 5cm under the drive of the motor two 21, and the water purified in the box body 1 passes through the suction nozzle under the action of the suction device. 3 and pipe one 4 and pipe two 5 flow into the sludge tank, and the scum 23 adsorbed on the inner wall of the suction nozzle 3 and pipe one 4 and pipe two 5 is cleaned by the action of clean water flow, and the whole equipment work is completed at this time.

Embodiment two, as shown in Figures 1 to 8, in this embodiment, the air flotation machine is installed outdoors, and when it rains, the raindrops fall on the casing 1 of the air flotation machine, causing the impact effect on the scum 23, The scum 23 separates the flocs from the air bubbles under the impact of the raindrops, and after losing the buoyancy of the air bubbles, the flocs settle into the water. Protective cover 24 is installed on the top, specifically as follows:

A protective cover 24 is installed on the mounting frame 2 through a hinge, and the protective cover 24 covers the entire mounting frame 2. The second tube 5 connects the air extraction device and the side of the protective cover 24, and is outside the protective cover 24, and the tube one 4 is installed in the protective cover 24. , the two ends are respectively connected to the pipe two 5 and the suction nozzle 3.

In the first embodiment, since the protective cover 24 is not installed, it is suitable for use in an environment where there is no damage to the scum 23 caused by falling objects, which has certain requirements for the use environment, but the use cost of the equipment will also be reduced. Production and manufacture of protective cover, secondly, it is convenient for workers to check whether the cleaning device is abnormal, without opening the protective cover 24 to reduce manual operations, in embodiment two, the protective cover 24 is installed on the mounting frame 2 by hinges, which can prevent falling objects from falling to The scum 23 damages the scum, and can be used in an environment where falling objects fall, but because the protective cover 24 is added, the cost of the equipment will be increased, and the protective cover 24 needs to be opened when checking the cleaning device. Overhaul the cleaning device.

The implementation manners not mentioned in the second embodiment are the same as those in the first embodiment, and will not be repeated here.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. A treatment process of oily heavy metal industrial wastewater is characterized by comprising the following steps:

s1: the oily heavy metal wastewater enters a sewage reaction zone of the box body (1), and a flocculating agent (PAC) and a coagulant aid (PAM) are added into the reaction zone;

s2: starting a gas dissolving device, and treating the oily heavy metal wastewater;

s3: the scum (23) rises to the liquid level, and triggers the detection device which controls the cleaning device to start;

s4, pumping the floating scum (23) to a sludge tank through a cleaning device;

s5: and when the wastewater treatment is finished, starting the lifting device, controlling the cleaning device to descend and absorb water by the lifting device, and finishing the cleaning of the cleaning device.

2. The treatment process of the industrial wastewater containing oil and heavy metals, according to claim 1, is characterized in that: cleaning device includes mounting bracket (2) and air exhaust device, movable mounting has suction nozzle (3) in mounting bracket (2), suction nozzle (3) top fixed mounting has pipe (4), pipe (4) are the hose, be connected with pipe two (5) on pipe (4), be connected with air exhaust device on pipe two (5), fixed mounting has the drive arrangement who is used for making suction nozzle (3) removal on mounting bracket (2), drive arrangement includes two lead screw (6), two lead screw (6) rotate and install on mounting bracket (2), and the axial direction of lead screw (6) is parallel with the long limit of mounting bracket (2), two all install ball nut (7) on lead screw (6), two the common fixed mounting in ball nut (7) below has fixed plate (8), it has the hole to open on fixed plate (8), pipe one (4) pass the hole, fixed plate (8) both sides slidable mounting has one (9), the one end and suction nozzle (3) fixed connection of bracing piece (9), fixed mounting bracket (2) is gone up fixed mounting bracket (10), motor (10) are connected through one hold-in-time.

3. The treatment process of the industrial wastewater containing oil and heavy metals according to claim 2, characterized in that: install elevating system on fixed plate (8), elevating system is used for realizing reciprocating of suction nozzle (3), elevating system includes rack (22) of fixed mounting on bracing piece (9), the meshing has the gear on rack (22), gear fixed mounting is in the pivot, the pivot is rotated and is installed on motor two (21).

4. The treatment process of the industrial wastewater containing oil and heavy metals according to claim 2, characterized in that: the box is characterized in that a first inclined guide plate (12) is fixedly mounted on the inner wall of the box body (1), a second inclined guide plate (13) is mounted above the first inclined guide plate (12), the lower end of the second inclined guide plate (13) is lower than the upper end of the first inclined guide plate (12), and the upper end of the second inclined guide plate (13) is flush with the end face of the box body (1).

5. The treatment process of the industrial wastewater containing oil and heavy metals, according to claim 4, is characterized in that: the top fixed mounting of oblique baffle two (13) has kickboard one (14), kickboard one (14) both ends fixed mounting has limiting plate (25), limiting plate (25) slidable mounting is on box (1).

6. The treatment process of the industrial wastewater containing oil and heavy metals, according to claim 5, is characterized in that: the detection device comprises a guide post (16) fixedly installed at the upper end of a first floating plate (14), and a buoyancy switch (17) is installed on the guide post (16) in a sliding mode.

7. The treatment process of the industrial wastewater containing oil and heavy metals according to claim 2, characterized in that: the floating device is arranged on the suction nozzle (3) and used for controlling the distance between the suction nozzle (3) and the liquid level in the box body (1).

8. The treatment process of the oily heavy metal industrial wastewater according to claim 7, characterized in that: the floating device comprises a floating plate II (15), the floating plate II (15) is arranged in a gap between a buoyancy switch (17) and the side wall of the box body (1), two support rods II (18) are fixedly arranged at two ends of the suction nozzle (3), the lower ends of the support rods II (18) are rotated to install rollers (19), and the rollers (19) are in contact with the upper surface of the floating plate II (15).

9. The treatment process of the industrial wastewater containing oil and heavy metals according to claim 2, characterized in that: the suction nozzle (3) is made of PP plastic materials with light weight and corrosion resistance.

10. The treatment process of the industrial wastewater containing oil and heavy metals according to claim 2, characterized in that: and a one-way valve (20) is arranged at the joint of the first pipe (4) and the suction nozzle (3).

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