CN203807275U - Skid-mounted oxygen exposure-free sewage treatment device - Google Patents

Abstract

The utility model discloses a skid-mounted oxygen exposure-free sewage treatment device. The device consists of an oxygen exposure-free purification reaction system, an oxygen exposure-free floatation system and an ultrasonic cleaning filter system which are communicated with each other, wherein the oxygen exposure-free purification reaction system comprises a nitrogen closing device, an agent mixing tank, a sludge removal skew plate, an oil collecting and sewage discharge device, an ultrasonic sterilization device and a dosing device; the oxygen exposure-free floatation system comprises a nitrogen closing and circulating device, an ultrasonic sterilization and synergic air floatation device, a static mixer and an oil collecting and sewage discharge device; a cleaning agent is synchronous with an ultrasonic cleaner as designed in the ultrasonic cleaning filter system, sewage is lifted to the oxygen exposure-free purification reaction system and is dosed and purified, the purified water enters the oxygen exposure-free floatation system through a lift pump and is subjected to floatation treatment, then the purified water enters the ultrasonic cleaning filter system through the lift pump and is filtered, and the filtered water is dosed and then delivered to a purified water tank through a sewage pipe; the skid-mounted oxygen exposure-free sewage treatment device disclosed by the utility model has good purification and floatation effects, and is stable in operation under the condition of ensuring that the water quality reaches the standards and simple in maintenance.

Description

A skid-mounted sewage treatment device without oxygen exposure

technical field

The utility model relates to the technical treatment of skid-mounted sewage in oil fields, in particular to a skid-mounted non-oxygen-exposed sewage treatment device.

Background technique

In the middle and later stages of oilfield development, the energy of the oil layer decreases, and elastic recovery can no longer meet the needs of oil well production, and the oil layer of the oil well has insufficient liquid supply. In order to supplement the energy of the oil layer, it is necessary to arrange water injection wells near the oil well to inject water into the oil layer. For individual small blocks and In oil fields with complex environments, the number of water injection wells is limited, and the daily sewage treatment volume is limited, generally below 300m ³ /day. The construction of large sewage treatment stations will result in a large area and large investment in equipment and pipeline networks, which will cause great waste , It is not suitable for sewage treatment in oil fields with small blocks and complex environments. Therefore, skid-mounted sewage treatment equipment has been developed.

There are a large number of skid-mounted sewage treatment devices on the market for the sewage treatment of small blocks and oil areas with ^complex environments. Dosing device. After the sewage is added with a treatment agent by the lift pump, it enters the degreaser; after degreasing by the degreaser, a treatment agent is added into the flotation unit, and the flotation unit uses an air compressor to inject air into the sewage for flotation; After flotation, it enters the filtration system, and a treatment agent is added after filtration; the dosing pumps used in all dosing devices are plunger metering pumps. The existing skid-mounted sewage treatment device has the following problems in oilfield sewage treatment: 1) Due to the limitation of skid-mounted space, the designed degreaser is too small in size, and the reaction of the pre-treatment agent of the degreaser is not sufficient, and the degreasing effect is insufficient. Poor, and can not settle the large and heavy particles in the sewage, so that they can enter the follow-up process; 2) The flotation device adopts air flotation, because the sewage generally has high salinity, low pH value, slightly acidic, and some pH is in the Around 5.5, a large amount of oxygen in the air enters the sewage, which greatly intensifies the corrosion of the sewage; 3), the sewage contains a certain amount of ferrous ions, and the entry of oxygen will also produce iron oxide precipitates in the pipeline transportation process , Increase the content of suspended solids in the injected water and pipeline scaling, 4), because the degreaser cannot remove heavy particles. After the heavy particles enter the flotation device, under the flotation of the air, they will not go up or down. The heavy particles cannot be removed and enter the filter, which increases the burden on the filter and reduces the processing capacity and effect; 5). All the dosing pumps in the sewage treatment plant adopt plunger metering pumps. Due to the small volume of the liquid distribution tank, the difficulty of on-site clean water sources, and the limitation of manpower, the daily dosing volume of the dosing pump is below 50L, which is equivalent to 0.035L/ Min, the field application reflects that the dosing pump of the skid-mounted sewage treatment device frequently has the problem of clogging and failure, especially the viscous liquid and the liquid with particles, which fail within half a year after application, resulting in the failure of normal dosing and sewage treatment. The effect is greatly reduced, and the water quality cannot meet the standard requirements; 6), although the filter tank has been backwashed, it is only cleaned with sewage and no medicine is added. Due to the oil in the sewage, the particles in the sewage are relatively viscous and adsorbed on the filter material , coupled with the limited flushing flow rate, it is difficult to remove the adsorbate on the surface of the filter material, which will lead to serious pollution of the filter material and loss of filtration capacity over time.

Contents of the invention

In order to overcome the deficiencies of existing skid-mounted sewage treatment devices, the purpose of this utility model is to provide a skid-mounted non-oxygenated sewage treatment device, which can carry out airtight non-oxygenated treatment of sewage in small blocks and oil areas in complex environments and nitrogen Recycling, very little consumption, the dosing pump will not be blocked during the operation of the device, the filter material is easy to clean, and the purification and flotation effects can be maximized. The device operates stably and is easy to maintain while ensuring that the water quality meets the standard.

In order to achieve the above object, the technical scheme of the utility model is:

A skid-mounted non-oxygen-exposed sewage treatment device, which is composed of a non-oxygen-exposed purification reaction system 1, an oxygen-free floating system 2, and an ultrasonic cleaning and filtering system 3 connected in sequence;

The oxygen-free purification reaction system 1 includes the first mixing tank dosing pump 3a, the first mixing tank dosing pump 3a communicates with the first mixing tank 2a through the sewage inlet lifting pump 1a, and the outlet pipeline at the bottom of the first mixing tank 2a passes through The second mixing tank dosing pump 5a communicates with the upper part of the second mixing tank 4a, the second mixing tank 4a communicates with the purification settling tank 6a, and the purification settling tank 6a is added by the sewage outlet dosing pump 15a and then lifted by the sewage outlet The pump 14a is connected to the non-oxygenated flotation system 2 .

The first mixing tank 2a has a small stirring chamber in its upper part, and the stirring speed is between 600-650rpm during operation, and there is no stirring in the lower part, leaving a certain space for the deceleration of liquid flow.

The tank body of the second mixing tank 4a is equipped with a stirrer, and the stirring speed is between 60-70rpm.

Described purification settling tank 6a, the shape of tank body is square body or horizontal cylindrical shape, is provided with the sewage inlet 7a of purification settling tank at 3/5 place of tank body height, at 9/10 place of tank body height An oil collection tank 9a is provided, and the oil collection tank 9a is distributed along the tank body, and a purified sewage outlet 13a is provided at 1/2 of the tank body height. The slope is designed to be 45°; the purification settling tank 6a is provided with a pressure regulating valve 16a and a pressure balance valve 17a, and the lower part of the purification settling tank 6a is provided with an ultrasonic generator 11a and an ultrasonic probe 12a.

Described oxygen-free flotation system 2 comprises a horizontal cylindrical tank body 1b, and its tank body 1b is divided into 3 compartments of unequal volumes by a first partition 11b and a second partition 12b, the first compartment It is 1/2 of the length of the tank body 1b, the second compartment is 3/10 of the length of the tank body 1b, the third compartment is 1/5 of the length of the tank body 1b, and the nitrogen inlet is at the upper part of the third compartment of the tank body, It is supplied by the nitrogen supply system 4b and connected to the tank 1b through the nitrogen pressure regulating valve 5b and the pressure balance valve 6b; the nitrogen distribution screen 9b is evenly distributed at the bottom of the second and third compartments; it is installed in the middle of the upper part of the tank There are a first magnetic centrifugal pump 7b and a second magnetic centrifugal pump 8b, the inlet of the first magnetic centrifugal pump 7b is connected to the middle outlet on the upper part of the second compartment of the tank body 1b, the outlet of the first magnetic centrifugal pump 7b is connected to the nitrogen distribution screen The middle part of the pipe 9b is connected; the inlet of the second magnetic centrifugal pump 8b is connected with the middle outlet of the second compartment top of the tank body 1b, and the outlet of the second magnetic centrifugal pump 8b is connected with the outlet pipeline of the purification settling tank 6a. Before the mixer 2b; the sewage inlet 3b is set at 1/2 of the tank height; the sewage outlet 17b is set at 2/5 of the tank height, the sewage outlet 17b is provided with an outlet baffle 16b, and the sewage outlet 17b is connected to the outlet Lift pump 18b; the oil receiving tank 10b is arranged at 9/10 of the height of the tank body, distributed along the periphery of the tank body; the opening of the first partition 11b is set at 2/5 of the height of the tank body, and the height of its upper part is at 2/5 of the height of the tank body 9/10; the opening of the second partition 12b is set at the bottom of the tank body 1b, and the height of its upper part is at 9/10 of the height of the tank body 1b; the ultrasonic probe 14b of the ultrasonic generator 13b is evenly placed in the middle of the three compartments The static mixer 2b is connected to the outlet pipeline of the purification settling tank 6a before the inlet 3b of the tank body 1b; the blowdown valve group 15b is evenly distributed in the bottom of each compartment, and the outlet of the blowdown valve group 15b is arranged in each compartment the middle part.

Described ultrasonic cleaning filtration system 3 comprises filter top water pipe 1c, and filter top water pipe 1c is connected with the filter group that walnut shell ultrasonic filter tank 3c, quartz sand ultrasonic filter tank 4c and fine ultrasonic filter tank 5c constitute, filters The water pipe 2c at the bottom of the filter is arranged under the filter group, and the side of the water pipe 2c at the bottom of the filter is provided with a backwash pump 6c, a backwash agent dosing pump 7c and a backwash pump controller 8c, and an ultrasonic generator 9c is arranged on the walnut shell ultrasonic filter One side of the tank 3c is connected with the ultrasonic probe 13b of the non-oxygenation flotation device 2 and the ultrasonic probe 4e of the filter, and the other side of the water pipe 2c at the bottom of the filter is provided with a corrosion inhibitor and bactericide dosing pump 10c and a resistor. Scale agent dosing pump 11c.

The walnut shell ultrasonic filter tank 3c in the described ultrasonic cleaning filter system 3, the quartz sand ultrasonic filter tank 4c and the fine ultrasonic filter tank 5c all include a tank body 1e, and the filter material 2e or fine filter tube 3e filled in the tank body 1e , the filter tank is provided with an ultrasonic probe 4e connected to the ultrasonic generator 9c, the ultrasonic probe 4e in the walnut shell ultrasonic filter tank 3c and the quartz sand ultrasonic filter tank 4c is divided into three layers and distributed evenly around the filter tank, and the fine ultrasonic filter tank 5c The ultrasonic probes 4e inside are vertically and evenly distributed in the tank.

The utility model belongs to a skid-mounted non-oxygen-exposed sewage treatment device and treatment technology, which is especially suitable for a small amount of oilfield sewage without oxygen-exposed treatment and reinjection. It adopts nitrogen sealing and a magnetic centrifugal pump to self-cycle nitrogen, and nitrogen consumption The amount is very small, and the plunger metering pump with an external air valve is suitable for adding viscous treatment agent and granular treatment agent with small displacement in the environment of lack of clean water, which solves the frequent dosing of plunger pump Blockage, or even the problem of normal dosing, it uses nitrogen sealing to solve the problem of air flotation with a large amount of oxygen entering the sewage and greatly increasing the corrosion of sewage. environmental wastewater treatment.

The skid-mounted sewage treatment device without oxygen exposure of the utility model can completely overcome the deficiencies of the existing skid-mounted sewage treatment devices on the market. The problem of oxygen exposure also solves the problem of conventional air flotation consumption of a large amount of nitrogen; 2) The non-oxygenation purification reaction system designed in the utility model can carry out primary treatment of sewage and add 3 kinds of treatment agents, which can effectively remove 3) the first and second mixing tanks are designed in the purification reaction system without oxygen exposure in the utility model, and the design of the first mixing tank is divided into 2 parts, and the first part is a mixing and stirring reaction chamber, the second part is the deceleration particle forming chamber; the stirring speed design of the two mixing tanks is different, and the design of the speed is determined through simulation experiments, which ensures the sufficient mixing and reaction of the treatment agent and the formation of large particles, so that The purification effect of sewage treatment has been guaranteed; 4) in the utility model, the inlet and outlet design of the tank sewage in the purification reaction system without exposure to oxygen is determined through indoor simulation experiments. The oil tank, sewage valve group, and ultrasonic sterilizing device ensure the separation of oil, suspended solids and sewage, and the control of bacteria; Nitrogen is used as a closed medium. On the other hand, its circulating power increases the flow rate of nitrogen in sewage and improves the effect of air flotation. At the same time, a bactericidal foaming agent is designed. Nitrogen and sewage are mixed in the pipeline before entering the non-aeration flotation. The selected system can fully play the role of the foaming agent. The fungicide plays the role of foaming while playing the role of sterilization. It makes full use of the function of the fungicide itself. The cavitation effect of the ultrasonic wave synergistically improves the effect of the fungicide. , and also synergistically improved the air flotation effect; 6) The tank body of the non-aeration flotation system is designed with 3 compartments, and the setting of the sewage inlet and outlet positions of the tank body is determined through indoor simulation experiments. The outlet and height design of the clapboard are also determined through indoor simulation experiments to ensure the separation of oil, suspended solids and sewage; 8) The cleaning of the filter adopts the method of adding backwashing agent and ultrasonic cleaning to ensure that the filter material can be effectively cleaned; 9) The dosing pump in the whole system adopts an external air valve plunger metering pump to ensure that it will not be blocked when adding granular treatment agents and viscous treatment agents; 10) The dosing points of various agents in the entire treatment system The design of the medicine is also determined through indoor simulation experiments, which maximizes the effect of the medicine.

The sewage treated by the utility model does not contain oxygen, and all indexes can meet the standard requirements, and the failure rate is low during use, the maintenance is simple, and the maintenance cost is low.

Description of drawings

Figure 1 is a schematic diagram of the skid-mounted non-oxygen-exposed sewage treatment device and the technical process of the treatment process.

Fig. 2 is a schematic diagram of a purification reaction system without oxygen exposure.

Figure 3 is a schematic diagram of a flotation system without oxygen exposure.

Fig. 4 is a schematic diagram of an ultrasonic cleaning filter system.

Fig. 5 is a schematic diagram of fouling of an ultrasonic filter tank; Fig. 5a is a sectional view, and Fig. 5b is a front view.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

Referring to Figure 1, a skid-mounted non-oxygen-exposed sewage treatment device is composed of a non-oxygen-exposed purification reaction system 1, a non-oxygen-exposed floating system 2, and an ultrasonic cleaning and filtering system 3 connected in sequence;

Referring to Fig. 2, the non-oxygenation purification reaction system 1 includes a first mixing tank dosing pump 3a, the first mixing tank dosing pump 3a communicates with the first mixing tank 2a through the sewage inlet lift pump 1a, and the bottom of the first mixing tank 2a The outlet pipeline communicates with the upper part of the second mixing tank 4a through the second mixing tank dosing pump 5a, and the second mixing tank 4a communicates with the purification settling tank 6a, and the purification settling tank 6a is added after the sewage outlet dosing pump 15a It is connected to the oxygen-free floating system 2 by the sewage outlet lift pump 14a.

The first mixing tank 2a has a small stirring chamber on its upper part, and the stirring speed is designed to be between 600 and 650rpm during operation. There is no stirring in the lower part, leaving a certain space for the deceleration of the liquid flow. It is easy to aggregate and produce small particles under deceleration conditions.

The tank body of the second mixing tank 4a is all equipped with agitators, and the stirring speed is relatively low, between 60～70rpm, large particles will be produced under low speed conditions to facilitate sedimentation, and the formed particles will be broken if the speed is too high. Large particles.

The purification settling tank 6a, the tank body is square or horizontal cylindrical, the sewage inlet 7a of the purification settling tank is arranged at 3/5 of the height of the tank body, and is set at 9/10 of the height of the tank body There are oil collection tanks 9a, which are distributed along the periphery of the tank body, and a purified sewage outlet 13a is set at 1/2 of the height of the tank body, which is beneficial to ensure the purification effect of the outlet water. The purification settling tank 6a is equipped with a desilter sloping plate 8a, the slope of the desilter sloping plate 8a is designed to be 45°, which can facilitate the separation of oil, water and suspended solids in the sewage; the purification settling tank 6a is provided with a pressure regulating valve 16a and a pressure balancing valve 17a, and the gas passes through the pressure regulating valve 16a and the pressure balance valve 17a enter the tank, and the pressure regulating valve starts to supplement the pressure. When the pressure is higher than the set value, the constant pressure valve starts to release the pressure. When the pressure is lower than the set value, the lower part of the purification settling tank 6a is equipped with ultrasonic Generator 11a and ultrasonic probe 12a.

With reference to Fig. 3, described non-oxygen flotation system 2 comprises horizontal cylindrical tank body 1b, and its tank body 1b is divided into 3 compartments of unequal volume by first partition 11b and second partition 12b, The first compartment is 1/2 of the length of the tank body 1b, the second compartment is 3/10 of the length of the tank body 1b, the third compartment is 2/10 of the length of the tank body 1b, and the nitrogen inlet is set at the second tank body The upper part of the three compartments is supplied by the nitrogen supply system 4b and communicated with the tank body 1b through the nitrogen pressure regulating valve 5b and the pressure balancing valve 6b, and the pressure inside the tank is controlled by the nitrogen pressure regulating valve 5b and the pressure balancing valve 6b; the nitrogen distribution screen 9b is evenly distributed at the bottom of the second and third compartments; a first magnetic centrifugal pump 7b and a second magnetic centrifugal pump 8b are installed in the middle of the upper part of the tank, and the inlet of the first magnetic centrifugal pump 7b is connected to the first magnetic centrifugal pump of the tank 1b. The middle outlet of the upper part of the two compartments is connected, and the outlet of the first magnetic centrifugal pump 7b is connected to the middle part of the nitrogen distribution screen 9b; the nitrogen circulation is injected into the second compartment and the third compartment from the nitrogen distribution screen 9b for air flotation , the inlet of the second magnetic centrifugal pump 8b is connected with the middle outlet of the second compartment top of the tank body 1b, the outlet of the second magnetic centrifugal pump 8b is connected with the outlet pipeline of the purification settling tank 6a, and its connection port is before the mixer 2b; The nitrogen circulation is injected into the first compartment from the inlet of the lift pump for air flotation. The sewage inlet 3b is set at 1/2 of the height of the tank body, which is conducive to the air flotation effect of the sewage in the subsequent process; the sewage outlet 17b is set at the height of the tank body At 2/5, the sewage outlet 17b is provided with an outlet baffle 16b, and the sewage outlet 17b is connected to the outlet lift pump 18b; the oil collection tank 10b is arranged at 9/10 of the height of the tank body and distributed along the periphery of the tank body; the first partition 11b The opening of the second partition 12b is designed at the bottom of the tank body 1b, and its upper height is at 9/10 of the height of the tank body. 9/10; the ultrasonic probe 14b of the ultrasonic generator 13b is evenly placed in the middle of the three compartments; the static mixer 2b is connected to the outlet pipeline of the purification settling tank 6a before the inlet 3b of the tank body 1b; the blowdown valve group 15b is uniform Distributed at the bottom of each compartment, the outlet of the blowdown valve group 15b is designed in the middle of each compartment.

With reference to Fig. 4, described ultrasonic cleaning filter system 3 comprises filter top water pipe 1c, filter top water pipe 1c all forms filter group with walnut shell ultrasonic filter tank 3c, quartz sand ultrasonic filter tank 4c and fine ultrasonic filter tank 5c The water pipe 2c at the bottom of the filter is arranged under the filter group, the backwash pump 6c is arranged on one side of the water pipe 2c at the bottom of the filter, the backwash agent dosing pump 7c and the backwash pump controller 8c, and the ultrasonic generator 9c is set on One side of the walnut shell ultrasonic filter tank 3c is connected to the ultrasonic probe 13b of the non-oxygen flotation device 2 and the ultrasonic probe 4e of the filter, and the other side of the water pipe 2c at the bottom of the filter is provided with a corrosion inhibitor and a fungicide dosing pump 10c and antiscalant dosing pump 11c.

Referring to Fig. 5, the walnut shell ultrasonic filter tank 3c in the described ultrasonic cleaning filter system 3, the quartz sand ultrasonic filter tank 4c and the fine ultrasonic filter tank 5c all comprise tank body 1e, and filter material 2e or The fine filter tube 3e, the ultrasonic probe 4e connected with the ultrasonic generator 9c is arranged in the filter tank, the ultrasonic probe 4e in the walnut shell ultrasonic filter tank 3c and the quartz sand ultrasonic filter tank 4c are divided into three layers and distributed evenly around the filter tank, fine The ultrasonic probes 4e in the ultrasonic filter tank 5c are vertically and evenly distributed in the tank.

The working principle of the utility model device is:

When filtering, the sewage is never exposed to the outlet lift pump 18b of the oxygen flotation system 2 and enters the filter tank 3c, filter tank 4c, and filter tank 5c sequentially through the upper water pipe 1c, valve F17, valve F1 ~ valve F9 are opened, and other valves are closed ; During backwashing, the outlet lifting pump in the non-oxygenated flotation unit 2 is closed, and the backwashing pump controller 8c starts the backwashing pump 6c and the backwashing agent dosing pump 7c to clean the first filter tank 3c, and the flow process is opened Valve F10, valve F2, valve F1, valve F11, valve F13, valve F15, and other valves are closed; after half an hour, the second filter tank 4C is cleaned, and the process opens valve F10, valve F12, valve F4, valve F5, valve F13, valve F15, and other valves are closed; after half an hour, the third filter tank 5C is cleaned, and the process opens valve F10, valve F12, valve F14, valve F7, valve F8, valve F15, and other valves are closed. After cleaning, return to the filtration process and open and close the corresponding valves.

As shown in Figure 2, after adding two kinds of treatment agents, the sewage enters the first mixing tank in the non-aeration purification reaction system through the lift pump. The high-speed stirring in the first mixing tank fully mixes and reacts to produce tiny particles, which gradually aggregate and grow into small particles under the low flow rate in the lower part of the first mixing tank. Sewage containing small particles enters the second mixing tank after adding the third treatment agent, and stirs at a low speed in the second mixing tank to produce large particles and enters the purification tank. , Sewage valve group blowdown, after the ultrasonic device is sterilized, the purified water that removes heavy particles and most of the oil is obtained, and enters the non-oxygen flotation system of the next link through the lift pump.

As shown in Figure 3, the purified sewage enters the non-aeration flotation system from the middle of the tank through the lift pump, and the bactericidal foaming agent is injected into the inlet and outlet of the lift pump, and the magnetic centrifugal pump injects nitrogen into the inlet and outlet of the lift pump. After being mixed in the pipeline, it enters the first compartment of the non-aeration flotation system. In the first compartment, a large amount of suspended solids and oil are adsorbed by the microbubbles generated by mixing nitrogen and bactericidal foaming agent, and float up to the top of the filling with the bubbles, and the sewage It flows downward through the water outlet of the partition and enters the second compartment for the second air flotation treatment, and then enters the third compartment from the bottom of the partition for the third air flotation treatment, and the suspended solids and oil move upward , The sewage moves downward and enters from the lower part of the outlet baffle, and the sewage treated by air flotation at 2/5 of the height of the tank enters the next level of ultrasonic cleaning and filtration system for treatment.

As shown in Figure 4, the sewage enters the first-stage walnut shell filter of the ultrasonic cleaning and filtration system through the lifting pump, and then enters the second-stage quartz sand filter after filtration, and finally enters the third-stage fine filter. Bactericides, corrosion inhibitors or corrosion and scale inhibitors enter the purified water tank, and all indicators of the treated sewage can meet the standard requirements. During the operation of the ultrasonic cleaning filter system, in order to prevent the pollution of the filter material and the fine filter tube, the filter material is cleaned periodically. It is designed to clean all the filter tanks once every 12 hours, stop the sewage from entering during cleaning, and start backwashing The pump sucks sewage from the purified water tank, starts the backwashing agent dosing pump synchronously to add cleaning agent, and starts the ultrasonic cleaner to clean the filter tanks one by one; when cleaning the first filter tank, the process opens valve F10, valve F2, valve F1, valve F11, valve F13, valve F15, and other valves are closed; after half an hour, the second filter tank 4C is cleaned, and the process opens valve F10, valve F12, valve F4, valve F5, valve F13, valve F15, and other valves Close; clean the third filter tank 5C after another half an hour, open valve F10, valve F12, valve F14, valve F7, valve F8, valve F15 in the flow process, and all other valves are closed. After cleaning, the filtration process is automatically resumed, and the corresponding valves are opened and closed. The cleaning time of each filter tank is 30min.

Based on the above-mentioned treatment method of a skid-mounted non-oxygenated sewage treatment device, the following contents are included:

(1), the sewage enters the first mixing tank in the non-oxygenation purification reaction system 1 after adding two kinds of purification treatment agents at the same time through the lifting pump. The name of the first purification treatment agent is GJH-1, the chemical composition of GJH-1 Composition: The mass ratio of _H2O2 is 15%, the mass ratio of hydroxyethylene diphosphonic acid is 3%, the mass ratio _of octadecyltrimethylammonium chloride is 5%, and the rest is water The name of the second purification treatment agent is GJH-2, the chemical composition of GJH-2: the mass ratio containing polyaluminum sulfate is 20%, the mass ratio containing polyferric sulfate is 5%, and the mass ratio containing stabilizer is 4%, the rest is water, the dosage of GJH-1 is 50-60mg/L, and the dosage of GJH-2 is 35-40mg/L. The design of the first mixing tank is that the sewage passes through the mixing chamber on the upper part of the mixing tank. Stirring, the stirring speed is designed to be 600~650rpm, which ensures the full mixing and reaction of the medicament and the sewage, and then reduces the shear speed at the lower part of the first mixing tank, which can effectively produce a large number of small particles, and at the outlet of the first mixing tank After adding the third purification treatment agent to the sewage, it enters the second mixing tank. The name of the third purification treatment agent is GJH-3. 70% acrylamide, containing 30% benzyltripropylammonium chloride, the addition amount is 25-30mg/L, the stirring speed is designed to be 60-70rpm, large particles are produced in the sewage in the second mixing tank, and the sewage depends on the second mixing The pressure of the tank enters the purification settling tank; in the purification tank, the sewage is accelerated by the desilter inclined plate to separate oil, water and suspended solids; Keep the nitrogen airtight during the operation, and the sealing pressure is 0.05mPa. When the pressure is higher than this value, the constant pressure valve starts to release the pressure. When the pressure is lower than this value, the pressure regulating valve starts to supplement the pressure;

(2) The sewage in the purification reaction system 1 without oxygen exposure is lifted by the lifting pump to the flotation system 2 without oxygen exposure through the outlet of the middle part of the purification settling tank (the design of the sewage outlet in the middle of the purification tank is the best design based on the simulation experiment. Optimum location, which can ensure the lowest content of suspended solids in the outlet water), add the bactericidal flotation agent and the pump by the dosing pump 15a before the lifting pump, and then rely on the magnetic centrifugal pump to fill in nitrogen, and never expose the flotation system to oxygen after passing through the static mixer 2 The middle part of the tank enters the first compartment (the design of the sewage inlet in the middle of the tank is the best position designed according to the simulation experiment, which is conducive to air flotation to remove oil and suspended solids), and the first compartment relies on sterilizing flotation. The selected agent absorbs tiny particles and oil floats up, and ultrasonic waves assist in sterilization and air flotation; the sewage after air flotation enters the second compartment through the middle and lower parts of the partitions of the first and second compartments (the best position designed according to the simulation experiment), Then enter the third compartment through the lower part of the clapboard of the second and third compartment (the best position designed according to the simulation experiment), and rely on the magnetic centrifugal pump to circulate nitrogen in the second and third compartment to continue flotation. The displacement is controlled between 14-15m ³ /h (too large displacement will cause the foam to be easily broken, the particles will be desorbed, and the air flotation effect will be reduced; if the displacement is too small, the suspended solids and oil cannot be effectively brought to the top of the device. The air flotation effect is reduced; the design of the displacement is the result obtained through the statistical analysis of a large number of experimental data of the simulated experimental device); the sewage in the third compartment in the non-aerobic flotation system 2 is in the middle and lower 2/5 of the tank body (the design of the outlet is the best position designed according to the simulation experiment, and the design of the outlet position is conducive to ensuring the lowest content of suspended solids and oil in the sewage entering the filtration system), and enters the ultrasonic cleaning and filtration system 3 through the lifting pump;

(3) The sewage in the non-oxygen flotation system 2 enters the ultrasonic cleaning and filtering system 3 through the lifting pump, and then passes through the walnut shell filter, quartz sand filter, and fine filter in turn; the filtered sewage passes through the filter pressure The pipeline is transported to the purified water tank; the filter process is designed with an automatic backwashing program for the filter tank, which is backwashed every 12 hours. Two sets of dosing devices are designed for the export to add corrosion inhibitors, corrosion and scale inhibitors, and fungicides to ensure that all indicators of the filtered sewage meet the standard requirements.

Claims (5)

1. the skid oxygen waste disposal plant that do not expose to the sun, is characterized in that, by the oxygen purification system (1) of not exposing to the sun, the floating system (2) of the oxygen that do not expose to the sun and ultrasonic cleaning filtering system (3), is communicated with and forms successively;

The oxygen purification system (1) of not exposing to the sun comprises the first mixing tank dosing pump (3a), the first mixing tank dosing pump (3a) is connected with the first mixing tank (2a) by sewage import lift pump (1a), the first mixing tank (2a) outlet at bottom pipeline is connected with the second mixing tank (4a) top through the second mixing tank dosing pump (5a), the second mixing tank (4a) is connected with purification slurry tank (6a), purifies slurry tank (6a) and by sewage outlet lift pump (14a), be communicated to the oxygen floatation system (2) that do not expose to the sun again after sewage outlet dosing pump (15a) dosing;

The described oxygen floatation system (2) that do not expose to the sun comprises the tank body (1b) of Horizontal cylinder shape, its tank body (1b) is divided into 3 not isopyknic compartments by the first dividing plate (11b) and second partition (12b), the first compartment is 1/2 of tank body (1b) length, the second compartment is 3/10 of tank body (1b) length, the 3rd compartment is 1/5 of tank body (1b) length, nitrogen inlet is arranged on the 3rd compartment upper of tank body, is supplied and passed through nitrogen pressure variable valve (5b) to be communicated in tank body (1b) with pressure-balanced valve (6b) by nitrogen supply (NS) system (4b); Nitrogen distribution screen casing (9b) is evenly distributed on the bottom of the second compartment and the 3rd compartment; The first magnetic centrifugal pump (7b) and the second magnetic centrifugal pump (8b) are installed in the middle of the top of tank body, the import of the first magnetic centrifugal pump (7b) is connected with the central exit of the second compartment upper of tank body (1b), and the outlet of the first magnetic centrifugal pump (7b) is connected with the middle part of nitrogen distribution screen casing (9b); The import of the second magnetic centrifugal pump (8b) is connected with the central exit of the second compartment upper of tank body (1b), and the outlet of the second magnetic centrifugal pump (8b) is connected its Link Port at mixing tank (2b) before with the outlet line that purifies slurry tank (6a); Sewage import (3b) is arranged on 1/2 place of tank body height; Sewage outlet (17b) is arranged on 2/5 place of tank body height, and sewage outlet (17b) locates to be provided with outlet damper (16b), sewage outlet (17b) connection outlet lift pump (18b); Collection tank (10b) is arranged on 9/10 place of tank body inner height, along tank body surrounding, distributes; The opening of the first dividing plate (11b) is arranged on 2/5 place of tank body height, and its upper height is at 9/10 place of tank body height; The opening of second partition (12b) is arranged on the bottom of tank body (1b), and its upper height is at 9/10 place of tank body (1b) height; The ultrasonic probe (14b) of ultrasonic generator (13b) is evenly respectively in the middle of 3 compartments; Static mixer (2b) is connected on the outlet line that purifies slurry tank (6a), in the import (3b) of tank body (1b) before; Wash water valve group (15b) is evenly distributed on the bottom of each compartment, and the outlet design of wash water valve group (15b) is in the middle part of each compartment;

Described ultrasonic cleaning filtering system (3) comprises filter top water pipe (1c), filter top water pipe (1c) all with nut-shell ultrasonic wave hay tank (3c), the filter set that quartz sand ultrasonic wave hay tank (4c) and meticulous ultrasonic wave hay tank (5c) form is connected, filter set below is provided with filter bottom water pipe (2c), filter bottom water pipe (2c) side is provided with backwashing pump (6c), recoil lotion dosing pump (7c) and backwashing pump controller (8c), ultrasonic generator (9c) is arranged on a side of nut-shell ultrasonic wave hay tank (3c), be connected with the ultrasonic probe (13b) of oxygen floatation device (2) of not exposing to the sun and the ultrasonic probe (4e) of strainer, the opposite side of filter bottom water pipe (2c) is provided with inhibiter and sterilant dosing pump (10c) and Scale inhibitors dosing pump (11c).

2. a kind of skid according to claim 1 oxygen waste disposal plant that do not expose to the sun, it is characterized in that, described the first mixing tank (2a), its top disposes a little stirring chamber, stirring velocity in service is designed between 600～650rpm, in bottom, do not design stirring, remainingly go out certain space and slow down for liquid stream.

3. a kind of skid according to claim 1 oxygen waste disposal plant that do not expose to the sun, is characterized in that, in the tank body of described the second mixing tank (4a), be all provided with agitator, stirring velocity is between 60～70rpm.

4. a kind of skid according to claim 1 oxygen waste disposal plant that do not expose to the sun, it is characterized in that, described purification slurry tank (6a), the shape of tank body is square body or Horizontal cylinder shape, at 3/5 place of tank body height, be provided with the sewage import (7a) that purifies slurry tank, at 9/10 place of tank body height, be provided with collection tank (9a), collection tank (9a) distributes along tank body surrounding, at 1/2 place of tank body height, be provided with the outlet (13a) of purifying waste water, purify in slurry tank (6a) and be provided with desilt swash plate (8a), the gradient of desilt swash plate (8a) is designed to 45 °; Purify on slurry tank (6a) and be provided with pressure regulator valve (16a) and pressure-balanced valve (17a), purify slurry tank (6a) bottom and be provided with ultrasonic generator (11a) and ultrasonic probe (12a).

5. a kind of skid according to claim 1 oxygen waste disposal plant that do not expose to the sun, it is characterized in that, nut-shell ultrasonic wave hay tank (3c) in described ultrasonic cleaning filtering system (3), quartz sand ultrasonic wave hay tank (4c) and meticulous ultrasonic wave hay tank (5c) include tank body (1e), the filtering material (2e) being filled with in tank body (1e) or fine filtering pipe (3e), in hay tank, be provided with the ultrasonic probe (4e) being connected with ultrasonic generator (9c), ultrasonic probe (4e) in nut-shell ultrasonic wave hay tank (3c) and quartz sand ultrasonic wave hay tank (4c) divides three layers and is uniformly distributed along hay tank surrounding, ultrasonic probe (4e) Vertical Uniform in meticulous ultrasonic wave hay tank (5c) is distributed in tank body.