CN112174400A

CN112174400A - Novel processing system of old and useless emulsion

Info

Publication number: CN112174400A
Application number: CN202011105204.3A
Authority: CN
Inventors: 王向阳; 岳会芳; 刘方; 黄蒙蒙
Original assignee: Zhengzhou Hengbo Environmental Technology Co ltd
Current assignee: Zhengzhou Hengbo Environmental Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-01-05

Abstract

The invention discloses a novel waste emulsion treatment system, which is characterized in that a demulsification reactor, an intermediate water tank, a wet catalytic oxidation tower, an electrocatalytic oxidation tank, an inclined plate sedimentation tank, an ozone reactor, a medium filter and a water storage tank are sequentially connected; the demulsification reactor is connected with a demulsifier dosing device, a separating agent dosing device, an oil-water depth separator and an intermediate water tank, a first water pump is arranged on one side of the oil-water separator and connected with the demulsification reactor through a pipeline, and an oil pump is arranged on the other side of the oil-water separator; the inclined plate sedimentation tank is connected with a PAC dosing device and a PAM dosing device, the output end of the inclined plate sedimentation tank is connected with a sludge dewatering machine, the output end of the sludge dewatering machine is connected with a low-temperature sludge drying machine, one end of an ozone reactor is provided with an ozone generator, and the output end of the ozone reactor is connected with a medium filter through a pipeline. This novel processing system of old and useless emulsion can be with the relative thorough of aquatic COD degradation after the old and useless emulsion separation oil, and the water after the processing can realize discharging.

Description

Novel processing system of old and useless emulsion

Technical Field

The invention relates to the technical field of waste emulsion treatment, in particular to a novel waste emulsion treatment system.

Background

In the modern industry, a large amount of waste emulsion is discharged in the deep processing production process of nonferrous metals. The waste emulsion is hazardous waste, toxic, harmful, irritant and corrosive, and needs to be treated. The treatment technology of the oil-containing waste emulsion commonly used in the prior art mainly comprises a salting-out method, a flocculation method, a direct evaporation method and the like. However, the waste emulsion treatment methods not only have the disadvantages of more residues, non-ideal effect, complex operation and the like, but also consume a large amount of human funds.

In order to solve the defects and the shortcomings of the waste emulsion treatment method, the method for efficiently and resourcefully treating the waste emulsion generated by nonferrous metal processing enterprises is developed, and the method has good environmental protection and social benefits, thereby providing a novel waste emulsion treatment system.

Disclosure of Invention

The invention aims to solve the problems in the prior art, not only has the defects of more residues, unsatisfactory effect, complex operation and the like when the waste emulsion is treated, but also consumes a large amount of human funds, and provides a novel waste emulsion treatment system. A novel old and useless emulsion processing system adopts earlier to realize oil-water separation, then step by step, the mode of the aquatic COD of degree of depth degradation, finally reaches waste water resource utilization or discharge requirement, can effective processing old and useless emulsion, saves a large amount of human funds.

In order to achieve the purpose, the invention adopts the following technical scheme: a novel treatment system for waste emulsion comprises a demulsification reactor, an intermediate water tank, a wet catalytic oxidation tower, an electrocatalytic oxidation tank, an inclined plate sedimentation tank, an ozone reactor, a medium filter and a water storage tank which are connected in sequence; the demulsification reactor is connected with a demulsifier dosing device, a separating agent dosing device, an oil-water depth separator and an intermediate water tank, a first water pump is arranged on one side of the oil-water separator and connected with the demulsification reactor through a pipeline, and an oil pump is arranged on the other side of the oil-water separator; the inclined plate sedimentation tank is connected with a PAC (programmable automation controller) dosing device and a PAM (pulse amplitude modulation) dosing device, the output end of the inclined plate sedimentation tank is connected with a sludge dewatering machine, the output end of the sludge dewatering machine is connected with a low-temperature sludge drying machine, one end of the ozone reactor is provided with an ozone generator, and the output end of the ozone reactor is connected with a medium filter through a pipeline.

Preferably, the demulsification reactor is internally provided with a rotary oil scraping device and a water draining device, the water draining device consists of a water pump and a valve, an oil separating plate is arranged in the middle of the demulsification reactor, and oil separated out by the oil separating plate is retained on one side of the rotary oil scraping device.

Preferably, a third water pump is arranged on one side of the sludge dewatering machine and is connected with the inclined plate sedimentation tank through a pipeline.

Preferably, a second water pump is arranged between the intermediate water tank and the wet catalytic oxidation tower.

Preferably, the reaction temperature of the wet catalytic oxidation tower is controlled at 270 ℃, and the pressure is controlled at 7.0 MPa.

Preferably, the polar plate of the electrocatalytic oxidation tank is a graphite polar plate, and the voltage is controlled to be 30-36V.

Preferably, an ozone catalyst filler is placed in the ozone reactor, and when COD (chemical oxygen demand) in water is 40-300mg/L, the volume ratio of the adding amount of the ozone catalyst to the water inflow is 1: 1.

Preferably, the adding amount of the ozone in the ozone reactor and the COD amount in the water are 1: 1.

Preferably, quartz sand filler is arranged in the medium filter, the thickness of the filler is 800mm, and the particle size of the filler is 0.6-1.2 mm.

Preferably, the oil-water depth separator is provided with a heat preservation device and a heat tracing device, the heat preservation device is heat preservation cotton arranged outside the oil-water depth separator, the heat tracing device is a steam coil arranged inside the oil-water depth separator, and the internal temperature is kept stable at 70 ℃.

Compared with the prior art, the invention has the beneficial effects that:

the novel treatment system for the waste emulsion can degrade COD (chemical oxygen demand) in water after the waste emulsion is separated from oil relatively thoroughly, and water treated by the novel treatment system for the waste emulsion can be discharged or recycled. The discharged water-containing sludge has obvious reduction effect after low-temperature drying treatment, and the sludge treatment cost of enterprises about waste emulsion systems can be reduced. Not only the effect is ideal, the residue is less, the operation is simple, but also a large amount of manpower fund is saved.

Drawings

FIG. 1 is a system configuration diagram of the present invention;

FIG. 2 is a process flow diagram of the present invention;

reference numbers in fig. 1:1 is an oil-water separator, 2 is an intermediate water tank, 3 is a wet catalytic oxidation tower, 4 is an electrocatalytic oxidation tank, 5 is an inclined plate sedimentation tank, 6 is an ozone reactor, 7 is a medium filter, 8 is a water storage tank, 9 is an oil-water deep separator, 10 is a sludge dewatering machine, 11 is a low-temperature sludge drying machine, 12 is an ozone generator, 13 is a demulsifier dosing device, 14 is a separating agent dosing device, 15 is a PAC dosing device, 16 is a PAM dosing device, 17 is a first water pump, 18 is an oil pump, 19 is a second water pump, 20 is a third water pump, 21 is a fourth water pump, and 22 is a fifth water pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present application, such as several changes and modifications, are within the scope of the present invention.

In combination with fig. 1 of the present application, the present invention provides a technical scheme of a novel waste emulsion treatment system: the utility model provides a novel old and useless emulsion processing system, mainly includes, breakdown of emulsion reactor 1, middle pond 2, wet-type catalytic oxidation tower 3, electrocatalytic oxidation pond 4, inclined plate sedimentation tank 5, ozone reactor 6, medium filter 7, storage water tank 8, profit depth separator 9, sludge dewaterer 10, low temperature sludge drying machine 11, ozone generator 12, demulsifier charge device 13, separator charge device 14, PAC charge device 15, PAM charge device 16, first water pump 17, oil pump 18, second water pump 19, third water pump 20, fourth water pump 21, fifth water pump 22.

A novel waste emulsion treatment system is characterized in that a demulsifying reactor 1 is connected with a demulsifying agent dosing device 13, a separating agent dosing device 14, an oil-water deep separator 9 and an intermediate water tank 2. The demulsifier and the separating agent are added into the demulsification reactor 1 of the novel waste emulsion treatment system through a demulsifier dosing device 13 and a separating agent dosing device 14 of the novel waste emulsion treatment system, so that preliminary oil-water separation is realized. Set up rotatory frizing device, drainage device in the breakdown of emulsion reactor 1, drainage device comprises water pump and valve, is provided with the oil removal board in the middle of the breakdown of emulsion reactor 1, and the oil removal board separates breakdown of emulsion reactor 1 for breakdown of emulsion room and drainage chamber, and wherein, the indoor rotatory frizing device that sets up of breakdown of emulsion sets up drainage device in the drainage chamber, and drainage device comprises water pump and valve connection, and rotatory frizing device and drainage device are prior art. Because the height of the oil separation plate is less than that of the demulsification reactor, the demulsification chamber is communicated with the bottom of the drainage chamber, and oil separated from the demulsification chamber is blocked at one side of the rotary oil scraping device, namely, is positioned in the demulsification chamber. Under the action of the demulsifier and the separating agent, the primary separation of oil and water is realized, the separated oil is retained by the oil separating plate, the separated oil is conveyed to the oil-water deep separator 9 by the rotary oil scraping device, the separated water is discharged by the water pump and the valve of the water discharging device and automatically flows to the intermediate water tank 2 by the pipeline, the oil content of the water quality of the intermediate water tank 2 is controlled within 10mg/L, the COD is estimated to be 6000 plus 7000mg/L, and the part of the COD is mainly water-soluble reducing substances which are difficult to degrade. The demulsification reactor 1 is connected with the oil-water deep separator 9, a first water pump 17 is arranged on one side of the oil-water deep separator 9 and connected with the demulsification reactor 1 through a pipeline, and an oil pump 18 is arranged on the other side of the oil-water deep separator 9. The oil-water separator 9 is provided with a heat preservation device and a heat tracing device, the heat preservation device is heat preservation cotton arranged outside the oil-water depth separator 9, the heat tracing device is a steam coil arranged inside the oil-water depth separator 9, and the internal temperature is kept stable at 70 degrees. The oil which is obtained by the preliminary oil-water separation of the waste emulsion in the emulsion breaking reactor 1 is conveyed to an oil-water deep separator 9 for further deep oil-water separation, and water and oil are separated. The water deeply separated by the oil-water deep separator 9 is returned to the emulsion breaking reactor 1 through a first water pump 17. The oil deeply separated by the oil-water deep separator 9 is transported out through an oil pump 18.

The intermediate water tank 2 is connected with the wet catalytic oxidation tower 3, and a second water pump 19 is arranged between the intermediate water tank and the wet catalytic oxidation tower. The second water pump 19 conveys water preliminarily separated from oil and water in the demulsification reactor 1 stored in the intermediate water tank 2 to the wet catalytic oxidation tower 3. The wet catalytic oxidation tower 3 controls the reaction temperature at 270 ℃ and the pressure at 7.0mpa, and the COD which is difficult to degrade is firstly degraded under the conditions of high temperature and high pressure, so that the COD in the water is degraded to about 500 mg/L. The wet catalytic oxidation tower 3 is connected with the electrocatalytic oxidation tank 4, and wastewater degraded by COD in the wet catalytic oxidation tower 3 is conveyed into the electrocatalytic oxidation tank 4 of a novel waste emulsion treatment system through a pipeline. The electrode plate of the electrocatalytic oxidation tank 4 adopts a graphite electrode, the voltage is 30-36V, and the part of COD which is difficult to degrade in water is continuously degraded through electrocatalytic oxidation, so that the COD in the discharged water is further about 200 mg/L.

The electrocatalytic oxidation tank 4 is communicated with the inclined plate sedimentation tank 5, and the inclined plate sedimentation tank 5 is connected with a PAC dosing device 15 and a PAM dosing device 16. The output end of the inclined plate sedimentation tank 5 is connected with a sludge dewatering machine 10, the output end of the sludge dewatering machine 10 is connected with a low-temperature sludge drying machine 11, and a third water pump 20 is arranged on one side of the sludge dewatering machine 10 and is connected with the inclined plate sedimentation tank 5 through a pipeline. PAC with the density of 2mg/L and PAM with the density of 1mg/L are added into the inclined plate sedimentation tank 5 to remove suspended matters in water generated by electrolysis, and sludge deposited at the bottom is periodically discharged into the sludge dewatering machine 10. The water content of the dewatered sludge reaches about 80 percent, the dewatered sludge is conveyed into a low-temperature sludge dryer 11, and the dewatered water is conveyed to a water inlet of an inclined plate sedimentation tank 5 through a third water pump 20. The low-temperature sludge dryer 11 can reduce the water content in the sludge to about 10% through sludge drying treatment, reduce the weight of the sludge needing to be transported outside by about 70%, greatly reduce the sludge treatment cost and save a large amount of manpower funds. The inclined plate sedimentation tank 5 is connected with an ozone reactor 6, and an ozone generator 12 is arranged at one end of the ozone reactor 6. Can remove the odor and the chroma in the water and can continuously degrade a small amount of residual COD, the COD of the effluent reaches about 50mg/L, and the requirement of discharge or recycling is preliminarily met. An ozone catalyst filler is placed in the ozone catalytic oxidation 6, and when COD (chemical oxygen demand) in water is 40-300mg/L, the volume ratio of the adding amount of the ozone catalyst to the water inflow is 1: 1. The amount of ozone added and the amount of COD in the water in the ozone reactor 6 are 1:1, and the unit is mg/L. The output end of the ozone reactor 6 is connected with the medium filter 7 through a pipeline, and a fourth water pump 21 is arranged between the output end and the medium filter. The medium filter 7 can deeply remove suspended matters and colloid in water and part of COD which is difficult to degrade, further improve the quality of the discharged water and meet the requirements of water recycling or discharge. The medium filter 7 is internally provided with a quartz sand filler, the thickness of the filler is 800mm, and the particle size of the filler is 0.6-1.2 mm. The medium filter 7 is connected with the water storage tank 8 through a pipeline, and water in the water storage tank 8 is conveyed to an external drainage system or a reuse water system through a fifth water pump 22.

The working process of the invention is as follows: when the novel waste emulsion treatment system works normally, waste emulsion enters the demulsification reactor 1, a demulsifier is added into the demulsification reactor 1 through a demulsifier dosing device 13, and a separating agent is added into the demulsification reactor 1 through a separating agent dosing device 14. In the demulsification reactor 1, the waste emulsion is subjected to preliminary oil-water separation under the action of a demulsifier and a separating agent. The demulsification reactor 1 is internally provided with a rotary oil scraping device and a water discharging device, and the middle of the demulsification reactor 1 is provided with an oil separating plate, so that oil primarily separated from oil water is retained on one side of the oil scraping device. Waste emulsion carries out the water oil preliminary separation through emulsion breaking reactor 1, detains the oil of water oil preliminary separation back through the baffle, carries the oil water deep separator 9 with the oil water preliminary separation through rotatory oil extraction device in, and water pump and the valve of drainage device are with the water of water oil preliminary separation through the pipeline from flowing to middle pond 2. The petroleum content of the water in the intermediate water tank 2 is controlled within 10mg/L, the COD is estimated to be 6000-7000mg/L, and the COD in the intermediate water tank 2 is mainly refractory water-soluble reducing substances. The oil water depth separator 9 further deeply separates the oil primarily separated from the oil water, the deeply separated water is conveyed to the middle water pool 2 through the first water pump 17, and the deeply separated oil is output through the oil pump 18. The oil-water depth separator 9 can adopt 'a novel oil-water separator' of patent number ZL 2019221116576, and oil-water depth separator 9 sets up heat preservation device and companion heat facility, and heat preservation device is for setting up at the outside heat preservation cotton of oil-water depth separator 9, and companion heat facility keeps inside temperature stable at 70 degrees for setting up at the inside steam coil pipe of oil-water depth separator 9. The water of the preliminary oil-water separation stored in the middle water tank 2 is conveyed to the wet catalytic oxidation tower 3 through the second water pump 19, the reaction temperature of the wet catalytic oxidation tower 3 is controlled at 270 ℃, the pressure of the wet catalytic oxidation tower 3 is controlled at 7.0MPa, and the COD which is difficult to degrade is degraded under the conditions of high temperature and high pressure, so that the COD in the water is degraded to about 500 mg/L. The water degraded by the wet catalytic oxidation tower 3 is conveyed into the electrocatalytic oxidation tank 4 through a pipeline, a graphite electrode plate is selected as a polar plate of the electrocatalytic oxidation tank 4, the voltage is controlled to be 30-36V, and the COD which is difficult to degrade in the water is continuously degraded through the electrocatalytic oxidation, so that the COD in the discharged water is further about 200 mg/L. The effluent of the electrocatalytic oxidation tank 4 enters an inclined plate sedimentation tank 5, PAC with the density of 2mg/L and PAM with the density of 1mg/L are added into the inclined plate sedimentation tank 5 through a PAC dosing device 15 and a PAM dosing device 16, suspended matters generated by electrolysis in water are removed, and sludge deposited at the bottom is periodically discharged into a sludge dewatering machine 10. The water content of the dewatered sludge reaches about 80 percent, the dewatered sludge is conveyed into a low-temperature sludge dryer 11, and the dewatered water is conveyed to a water inlet of an inclined plate sedimentation tank 5 through a third water pump 20. The low-temperature sludge dryer 11 can reduce the water content in the sludge to about 10% through sludge drying treatment, reduce the weight of the sludge needing to be transported outside by about 70%, greatly reduce the sludge treatment cost and save a large amount of manpower funds.

The water treated by the inclined plate sedimentation tank 5 automatically flows to the ozone reactor 6 through a pipeline, so that the odor and the chroma in the water can be removed, the residual COD can be continuously degraded, the COD of the effluent water reaches about 50mg/L, and the volume ratio of the adding amount of the ozone catalyst to the water inflow in the ozone reactor 6 which can initially meet the requirement of being discharged or recycled is 1: 1. The effluent of the ozone reactor 6 is conveyed into the medium filter 7 through the fourth water pump 21, suspended matters and colloid in the water and part of COD which is difficult to degrade are removed deeply, the quality of the discharged water is further improved, and the requirement of water recycling or discharge is met. The medium filter 7 is internally provided with quartz sand filler, the thickness of the filler is 800mm, and the particle size of the filler is 0.6-1.2 mm. The water from the medium filter 7 flows automatically to the water storage tank 8 through a water pipe, and the water in the water storage tank 8 is conveyed to an external drainage system or a reuse water system through a fifth water pump 22.

The invention has been described in connection with the preferred embodiments illustrated in the drawings and described above, and it should be understood that various changes, substitutions, and alterations can be made without departing from the overall spirit of the invention.

Claims

1. The utility model provides a novel processing system of old and useless emulsion which characterized in that: the demulsification reactor (1), the intermediate water tank (2), the wet catalytic oxidation tower (3), the electrocatalytic oxidation tank (4), the inclined plate sedimentation tank (5), the ozone reactor (6), the medium filter (7) and the water storage tank (8) are sequentially connected; the demulsification reactor (1) is connected with a demulsifier dosing device (13), a separating agent dosing device (14), an oil-water deep separator (9) and an intermediate water tank (2), a first water pump (17) is arranged on one side of the oil-water separator (9) and connected with the demulsification reactor (1) through a pipeline, and an oil pump (18) is arranged on the other side; the device is characterized in that the inclined plate sedimentation tank (5) is connected with a PAC (programmable automation controller) dosing device (15) and a PAM (pulse amplitude modulation) dosing device (16), the output end of the inclined plate sedimentation tank (5) is connected with the sludge dewatering machine (10), the output end of the sludge dewatering machine (10) is connected with the low-temperature sludge drying machine (11), one end of the ozone reactor (6) is provided with the ozone generator (12), and the output end of the ozone reactor (6) is connected with the medium filter (7) through a pipeline.

2. The novel waste emulsion treatment system according to claim 1, characterized in that: the demulsification reactor (1) in set up rotatory frizing device, drainage device comprises water pump and valve, sets up the oil interceptor in the middle of the demulsification reactor (1), the oil interceptor keeps the rotatory frizing device one side with the oil of preliminary water oil separating.

3. The novel waste emulsion treatment system according to claim 1, characterized in that: one side of the sludge dewatering machine (10) is provided with a third water pump (20) which is connected with the inclined plate sedimentation tank (5) through a pipeline.

4. The novel waste emulsion treatment system according to claim 1, characterized in that: and a second water pump (19) is arranged between the middle water tank (2) and the wet catalytic oxidation tower (3).

5. The novel waste emulsion treatment system according to claim 1, characterized in that: the reaction temperature of the wet catalytic oxidation tower (3) is controlled at 270 ℃, and the pressure is controlled at 7.0 MPa.

6. The novel waste emulsion treatment system according to claim 1, characterized in that: the polar plate of the electrocatalytic oxidation tank (4) is a graphite polar plate, and the voltage is controlled to be 30-36V.

7. The novel waste emulsion treatment system according to claim 1, characterized in that: an ozone catalyst filler is placed in the ozone reactor (6), and when COD (chemical oxygen demand) in water is 40-300mg/L, the volume ratio of the adding amount of the ozone catalyst to the water inflow is 1: 1.

8. The novel waste emulsion treatment system according to claim 1, characterized in that: the adding amount of the ozone in the ozone reactor (6) and the COD amount in the water are 1: 1.

9. The novel waste emulsion treatment system according to claim 1, characterized in that: the medium filter (7) is internally provided with a quartz sand filler, the thickness of the filler is 800mm, and the grain diameter of the filler is 0.6-1.2 mm.

10. The novel waste emulsion treatment system according to claim 1, characterized in that: the oil-water depth separator (9) is provided with a heat preservation device and a heat tracing device, the heat preservation device is heat preservation cotton arranged outside the oil-water depth separator (9), the heat tracing device is a steam coil arranged inside the oil-water depth separator (9), and the internal temperature is kept stable at 70 ℃.