A waste emulsion treatment device with reaction, demulsification and oxidation functions

Abstract

The invention discloses a waste emulsion treatment device with reaction, demulsification and oxidation functions, comprising a cylindrical tower body, which is cleverly divided into six functional areas, namely A, B, C, D, E and F, and the functional areas are connected. The flow of liquid in each functional area is gravity flow, and the liquid level decreases from area A to area F in sequence. The reaction, demulsification, separation, buffering, advanced oxidation and oil storage of the waste emulsion treatment process are concentrated in one multifunctional device, realizing one-piece multi-function. The whole device has a small functional volume, reduces the floor space, operates continuously, reduces the investment cost, and greatly reduces the number of management personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of high-difficulty industrial wastewater treatment, and specifically relates to the treatment of waste emulsion of hazardous waste from aluminum processing, and is a waste emulsion treatment device with reaction, demulsification and oxidation functions. Background Art

[0002] Emulsion is used in the rolling process of aluminum. After being used to a certain extent, the emulsion deteriorates and is discharged to become waste emulsion. The COD of waste emulsion is usually as high as tens of thousands or even hundreds of thousands. It is mainly composed of mineral oil, vegetable oil, animal oil, surfactant, additive, preservative and water. After the waste emulsion enters the water, the oily substances float on the water surface to form an oil film, which prevents the oxygen in the air from dissolving in the water, causing aquatic organisms to die of lack of oxygen, deteriorating water quality and causing environmental pollution. Surfactants and organic amine additives are also harmful to animals and plants in the water. After entering the human body through biological enrichment and the food chain, they will seriously endanger human health.

[0003] The commonly used chemical treatment methods for waste emulsion are salting out or acidification. The treatment process line is relatively long, the process section devices are numerous and scattered, the floor space is large, and it is difficult to coordinate and unify. In addition, since the stratification level of the oil phase and the water phase is difficult to observe and control, the effluent water quality is often unstable. For waste emulsion with a daily discharge of less than 30m 3 For enterprises, building a processing line with decentralized devices not only requires a large investment, but also requires multiple people to operate and maintain it, which makes it difficult to manage. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention provides a waste emulsion treatment device which reduces floor space, operates continuously, reduces investment costs, reduces management personnel, and has reaction, demulsification and oxidation functions.

[0005] The object of the present invention is achieved in the following manner:

[0006] A waste emulsion treatment device with reaction, demulsification and oxidation functions comprises a cylindrical tower body, which is divided into six functional areas: A, B, C, D, E and F. Area A is a reaction area, area B is a demulsification area, area C is a separation area, area D is a buffer area, area E is an oxidation area, and area F is an oil storage area.

[0007] The A zone is located at the upper part of the tower body, and only the liquid inlet pipe and the liquid outlet pipe are connected to the outside world. The liquid inlet pipe extends from the upper side wall of the tower body, and the liquid outlet pipe is connected to the B zone;

[0008] The B zone and the C zone are located in the outer ring of the middle part of the tower body, forming an annular channel. The B zone is connected to the C zone without obvious boundaries, and the C zone is not connected to the B zone, which is separated by the first partition.

[0009] The D zone is located at the bottom of the tower body, the D zone is not connected to the B zone, and the D zone is connected to the C zone through the connecting hole at the end of the C zone; a secondary mixing tube is arranged at the center of the D zone, and is connected to the E zone through the secondary mixing tube; a liquid circulation inlet is arranged in the D zone, and a liquid circulation outlet is arranged in the E zone, a circulation pump and a pipeline mixer are arranged between the liquid circulation inlet and the liquid circulation outlet, the pipeline mixer is connected to the dosing system, and the liquid circulation inlet extends into the interior of the secondary mixing tube and is connected to the secondary mixing tube;

[0010] The E zone and the F zone are located at the center of the tower body inside the B zone and the C zone. The E zone and the F zone are separated by a second partition and are not connected to each other. A water outlet pipe is arranged on the upper part of the E zone and extends out of the tower body. The partition of the F zone and the C zone is connected by an opening at the upper part. The lower part of the F zone is connected to the oil outlet pipe and extends out of the tower body.

[0011] The flow of liquid in each functional area is gravity flow, and the liquid level decreases from area A to area F.

[0012] The volume of each functional area is calculated according to the multiple of the volume flow rate X of the liquid entering the device through the liquid inlet pipe, the volume of area A is greater than 0.5X, the total volume of areas B and C is greater than 10X, the volume of area D is greater than 1X, the volume of area E is greater than 2.5X, and the volume of area F is greater than 2X.

[0013] Zone A is equipped with a stirrer.

[0014] A thermometer and pH meter are set up in area A.

[0015] A water distribution trough is arranged on the side of the first partition from zone C to zone B, the upper edge of the water distribution trough is lower than the liquid level in zone B, and the liquid outlet pipe extends into the water distribution trough.

[0016] A liquid level meter is installed in area F.

[0017] There are maintenance manholes at the top and bottom of the tower.

[0018] An exhaust port is also arranged on the top of the tower body.

[0019] Compared with the prior art, the present invention concentrates the various process sections of waste emulsion treatment on a multifunctional device, cleverly divides them into zones, and connects the functional areas to achieve multi-functionality in one. The entire device has a small functional volume, reduces floor space, operates continuously, reduces investment costs, and greatly reduces the number of management personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the present invention.

[0021] Figure 2 yes Figure 1 Sectional view 1-1.

[0022] Figure 3 yes Figure 1 Sectional view 2-2.

[0023] Figure 4 yes Figure 1 Section view 3-3.

[0024] Figure 5 yes Figure 2 Section view 4-4.

[0025] Figure 6 yes Figure 2 Section view 5-5.

[0026] Figure 7 It is a schematic diagram of a water distribution tank.

[0027] In the figure: 1-liquid inlet pipe, 2-water outlet pipe, 3-oil outlet pipe, 4-liquid circulation outlet, 5-liquid circulation inlet, 6-secondary mixing pipe, 7-exhaust port, 8-agitator, 9-thermometer, 10-pH measuring instrument, 11-liquid level meter, 12-inspection manhole, 13-support leg, 14-first partition, 15-liquid outlet pipe, 16-second partition, 17-water distribution tank, 18-hole. DETAILED DESCRIPTION

[0028] like Figure 1-7 As shown, a waste emulsion treatment device with reaction, demulsification and oxidation functions includes a cylindrical tower body, a support leg 13 is provided at the lower part of the tower body to support the entire device, and 3 or 4 support legs 13 are provided. The tower body is divided into six functional areas, namely, A, B, C, D, E and F. Area A is a reaction area, area B is a demulsification area, area C is a separation area, area D is a buffer area, area E is an oxidation area, and area F is an oil storage area. The A zone is located at the upper part of the tower body, and only the liquid inlet pipe 1 and the liquid outlet pipe 15 are connected to the outside. The liquid inlet pipe 1 extends from the upper side wall of the tower body, and the liquid outlet pipe 15 is connected to the B zone; the B zone and the C zone are located in the outer ring of the middle part of the tower body, forming an annular channel. The B zone is connected to the C zone without obvious boundaries, and the C zone is not connected to the B zone, which is separated by the first partition 14; the D zone is located at the bottom of the tower body, and the D zone is not connected to the B zone. The D zone is connected to the C zone through the connecting hole at the end of the C zone; a secondary mixing pipe 6 is set in the center of the D zone, which is connected to the E zone through the secondary mixing pipe 6, and the D zone is provided with a liquid A circulation inlet 5, a liquid circulation outlet 4 is provided in zone E, a circulation pump and a pipeline mixer are arranged between the liquid circulation outlet 4 and the liquid circulation inlet 5, the pipeline mixer is connected to the dosing system, the liquid circulation inlet 5 extends into the secondary mixing tube 6 and is connected with the secondary mixing tube 6; the zone E and zone F are located at the center of the tower body inside zones B and C, the zone E and zone F are separated from each other by a second partition 16, a water outlet pipe 2 is arranged at the upper part of zone E extending out of the tower body, the partition between zone F and zone C is connected at the upper opening 18, and the lower part of zone F is connected with an oil outlet pipe 3 extending out of the tower body.

[0029] The waste emulsion that has been pre-doped and heated is lifted to the liquid inlet of the device by a pump, and enters the A area of ​​the tower body through the liquid inlet pipe 1. The liquid is fully stirred in the A area for mixing reaction, and then flows to the B area through the liquid outlet pipe 15 under the action of gravity. During the slow flow of the liquid from the B area to the C area, the liquid gradually stratifies to form an upper oil layer, a middle oil-water mixed layer, and a lower water layer, and finally is divided into two layers of oil layer and water layer. The stratification process is continuous, so there is no clear boundary between the B area and the C area. At the end of the C area, the upper oil layer separated in the C area enters the F area for storage through the upper opening 18 of the partition between the C area and the F area. When the storage capacity reaches the maximum, it is discharged from the lower oil outlet pipe 3 of the F area to the outside of the device; the lower water layer separated in the C area enters the D area through the partition openings of the C and D areas, and enters the E area through the secondary mixing pipe 6 of the D area for advanced oxidation reaction. The wastewater after the oxidation reaction is discharged from the upper water outlet pipe 2 of the E area to the outside of the device. The flow of liquid in each functional area is gravity flow, and the liquid level decreases from area A to area F.

[0030] Outside the device, a circulation pump and a pipeline mixer are arranged between the circulation outlet 4 and the liquid circulation inlet 5. The circulation volume is about 10 times the liquid inlet volume of the device. The pipeline mixer is connected to the advanced oxidation dosing system. The reagents required for advanced oxidation are mixed for the first time in the pipeline mixer. The mixed liquid enters the secondary mixing tube 6 in the E zone through the circulation inlet 5. The high-speed water flow pressurized by the circulation pump forms a local negative pressure in the vicinity of the area ejected from the circulation inlet pipe, driving the liquid in the secondary mixing tube 6 to mix with the liquid in the circulation inlet pipe for the second time, and also driving the liquid to flow from the D zone to the secondary mixing tube 6 and then into the E zone.

[0031] The most important purpose of the liquid circulation inlet is to connect the dosing system to provide the required drugs and suitable pH conditions for the advanced oxidation reaction in zone E. The pressure of the circulating booster pump is used to circulate and stir the liquid in zone E, so that the added drugs required for advanced oxidation can be quickly mixed with the liquid in zone E. At the same time, the liquid in zone D can be better pumped into zone E through the circulating booster pump and the secondary mixing tube 6.

[0032] The volume of each functional area is calculated according to the volume flow rate Xm of the liquid entering the device through the liquid inlet pipe 1. 3 / h multiple calculation, the volume of area A> 0.5X, the total volume of areas B and C> 10X, the volume of area D> 1X, the volume of area E> 2.5X, and the volume of area F> 2X. For example, the volume flow rate of the liquid entering area A through the liquid inlet pipe 1 is 1m 3 / h, the volume of zone A is greater than 0.5m 3 The total volume of zones B and C is greater than 10m 3 , the volume of zone D is greater than 1m 3 , the volume of zone E is greater than 2.5m 3 , the volume of zone F is greater than 2m 3 .

[0033] Zone A is provided with a stirrer 8, which is frequency-controlled. The stirrer 8 stirs the waste emulsion in zone A evenly and makes the reaction more complete.

[0034] A thermometer 9 and a pH meter 10 are provided in the A zone, which can be interlocked with the dosing and heating system in front of the liquid inlet pipe 1 to timely adjust the temperature and pH value of the liquid entering the A zone to ensure a more complete reaction in the reaction zone.

[0035] A liquid level meter 11 is provided in the F area. Either a liquid level meter or a liquid level switch can be used. The liquid level meter 11 is interlocked with the automatic valves of the oil outlet 3 and the water outlet 2 outside the device. Under normal circumstances, the water outlet 2 is kept open and the oil outlet is closed. When the oil storage level reaches the highest, the valve of the oil outlet 3 is opened to start draining oil. At this time, the water outlet still drains water normally. In order to ensure that the floating oil layer in the upper and middle layers of the C zone does not exceed a certain thickness, to ensure that the separated water layer maintains a certain height, and to make the water quality of the outlet 2 stable, after the device has been running for a certain period of time, it is necessary to reduce the thickness of the floating oil layer to the minimum through a large number of removal methods. At this time, the valve of the outlet 2 can be temporarily closed for 20 minutes and then opened. Of course, the closing time of the valve of the outlet 2 can be adjusted at any time according to the actual situation of the liquid level drop speed in the F zone and the liquid level rise speed in the B and C zones, so as to ensure that the liquid level in the C zone does not exceed the upper edge height of the opening 18 in the upper part of the partition plate in the C and F zones. At this time, due to the temporary closure of the valve of the outlet 2, the liquid level in the B and C zones rises, and the water that should be normally discharged through the outlet 2 will enter the F zone through the opening 18 in the upper part of the partition plate in the C and F zones. When the oil storage level in the F zone reaches the minimum, the valve of the oil outlet 3 is closed.

[0036] An exhaust port 7 is also provided on the top of the tower body. When the device is in operation, the internal temperature is high, and part of the organic matter in the waste liquid is gasified to produce odor, which is discharged through the exhaust port 7. The exhaust port needs to be connected to the waste gas treatment system.

[0037] A maintenance manhole 12 is provided at the top of the tower body. When the tower is shut down for maintenance, the inside of the device can be entered from the top to inspect, repair or clean up the B, C, E and F areas. A maintenance manhole 12 is also provided at the bottom of the tower body. When the tower is shut down for maintenance, the maintenance manhole is opened to enter the device from the bottom to clean the small amount of sludge that may have accumulated in the D area.

[0038] A water distribution trough 17 is arranged on the side of the first partition 14 from zone C to zone B, the upper edge of which is more than 100 mm below the liquid level in zone B, and the liquid outlet pipe 15 extends into the water distribution trough 17. The water distribution trough 17 can ensure that the liquid is evenly distributed at the liquid level, avoid the phenomenon of liquid splashing, and will not form a dead angle at the head end of zone B.

[0039] The tower body and the internal area of ​​the device can also be designed to be square, rectangular, polygonal, elliptical or other shapes from a horizontal cross-section. The key is to ensure the residence time and flow state of the treated liquid in each functional area and minimize dead corners in the space. Preferably, circle and ellipse are better than other shapes.

[0040] The upper and lower parts of the device can be designed into various forms such as elliptical heads, butterfly heads, cones, dome plates, flat plates, etc. Preferably, the elliptical head form is better than other forms in terms of structural strength.

[0041] The waste emulsion contained in this device and the various reagents added react in the tower body. The material of the device needs to be corrosion-resistant, temperature-resistant, oxidation-resistant, and oil-resistant. For example, 907 special fiberglass, titanium alloy, lead alloy, 2507 alloy steel, 907 stainless steel, enamel, glass and other materials can be used.

[0042] A G zone is also provided in the tower body. The G zone is located above the B, C, E and F zones and communicates with these four zones. The G zone is a special maintenance space and is communicated with the maintenance manhole 12 at the upper part of the tower body.

[0043] Working process:

[0044] First, before the waste emulsion treatment is officially carried out, the tower body is filled with pure water. The process of filling with pure water is also carried out according to the liquid flow direction of the waste emulsion. The tower body is filled with pure water, which means that the A area, B area, C area, D area, and E area are all filled with pure water, and the F area is just enough to have water. The liquid level in the entire tower body remains in a relatively stable state.

[0045] When the waste emulsion treatment is officially started, the waste emulsion that has been pre-doped and heated is introduced into area A through the liquid inlet 1. The liquid is fully reacted in area A and then flows to area B through the liquid outlet pipe 15 under the action of gravity. During the slow flow of the liquid from area B to area C, the liquid is gradually stratified and finally divided into two layers, an oil layer and a water layer, at the end of area C. The oil layer enters area F for storage through the upper opening 18 of the partition between area C and area F. When the storage capacity reaches the maximum, it is discharged from the lower oil outlet pipe 3 of area F to the outside of the device; the water layer enters area D through the partition openings of areas C and D, and enters area E through the secondary mixing pipe 6 of area D for advanced oxidation reaction. Area D supplements the drugs required for the advanced oxidation reaction through the liquid circulation inlet 5, and a circulating pressure pump is connected to the liquid circulation inlet 5, so that the liquid in area D can better enter the secondary mixing pipe 6 for mixing and finally enter area E. The wastewater after the oxidation reaction is discharged from the upper water outlet pipe 2 of area E to the outside of the device.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A waste emulsion treatment device with both reaction demulsification and oxidation functions, characterized in that: It includes a cylindrical tower body, which is divided into six functional areas: A, B, C, D, E, and F. Area A is the reaction area, area B is the demulsification area, area C is the separation area, area D is the buffer area, area E is the oxidation area, and area F is the oil storage area. The A zone is located at the upper part of the tower body, and is connected to the outside only by a liquid inlet pipe (1) and a liquid outlet pipe (15). The liquid inlet pipe (1) extends from the upper side wall of the tower body, and the liquid outlet pipe (15) is connected to the B zone. The B zone and the C zone are located in the outer ring of the middle part of the tower body, forming an annular channel. The B zone is connected to the C zone without obvious boundaries, while the C zone is not connected to the B zone and is separated by a first partition (14). The D zone is located at the bottom of the tower body, the D zone is not connected to the B zone, and the D zone is connected to the C zone via a connecting hole at the end of the C zone; a secondary mixing pipe (6) is arranged at the center of the D zone, and the D zone is connected to the E zone via the secondary mixing pipe (6); the D zone is provided with a liquid circulation inlet (5), and the E zone is provided with a liquid circulation outlet (4); a circulation pump and a pipeline mixer are arranged between the liquid circulation inlet (5) and the liquid circulation outlet (4); the pipeline mixer is connected to a dosing system, and the liquid circulation inlet (5) extends into the interior of the secondary mixing pipe (6) and is connected to the secondary mixing pipe (6); The E zone and the F zone are located at the center of the tower body inside the B zone and the C zone. The E zone and the F zone are separated by a second partition (16) and are not connected to each other. A water outlet pipe (2) is arranged at the upper part of the E zone and extends out of the tower body. The partition of the F zone and the C zone is connected at the upper opening (18). The lower part of the F zone is connected to the oil outlet pipe (3) and extends out of the tower body. The flow of liquid in each functional area is gravity flow, and the liquid level decreases from area A to area F.

2. The waste emulsion treatment device with reaction demulsification and oxidation functions according to claim 1, characterized in that: The volume of each functional area is calculated according to the multiple of the volume flow rate X of the liquid entering the device through the liquid inlet pipe, the volume of area A is greater than 0.5X, the total volume of areas B and C is greater than 10X, the volume of area D is greater than 1X, the volume of area E is greater than 2.5X, and the volume of area F is greater than 2X.

3. According to claim 1, a waste emulsion treatment device with both reaction demulsification and oxidation functions is characterized in that: Zone A is provided with a stirrer (8).

4. The waste emulsion treatment device with reaction, demulsification and oxidation functions according to claim 1, characterized in that: A thermometer (9) and a pH meter (10) are provided in area A.

5. The waste emulsion treatment device with reaction, demulsification and oxidation functions according to claim 1, characterized in that: A water distribution trough (17) is provided on the side of the first partition (14) from zone C to zone B, which faces zone B. The upper edge of the water distribution trough is lower than the liquid level in zone B, and the liquid outlet pipe (15) extends into the water distribution trough (17).

6. The waste emulsion treatment device with reaction, demulsification and oxidation functions according to claim 1, characterized in that: A liquid level meter (11) is provided in area F.

7. The waste emulsion treatment device with reaction, demulsification and oxidation functions according to claim 1, characterized in that: Inspection manholes (12) are provided at the top and bottom of the tower body.

8. The waste emulsion treatment device with reaction, demulsification and oxidation functions according to claim 1, characterized in that: An exhaust port (7) is also provided at the top of the tower body.

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