Oil removal and separation device for coking distilled ammonia wastewater

Abstract

The utility model discloses a coking stilling ammonia wastewater deoiling and separating device, which comprises a separating box and a water tank, the inside of the separating box is divided into a light oil separating chamber and a heavy oil separating chamber by a separating layer made of oleophylic and hydrophobic materials, the separating layer sequentially comprises an inclined tube component layer and a sponge layer from bottom to top, and a plurality of conical shells are arranged in the light oil separating chamber. The lower end of the conical shell extends into the heavy oil separation chamber, a conveying belt is obliquely arranged on the upper portion in the light oil separation chamber, a sponge belt made of oleophylic and hydrophobic materials is arranged on the belt face of the conveying belt, and a supporting block and a flow guide groove are arranged on the two sides of a lower belt below the higher end of the conveying belt respectively. The upper end of the inclined plate abuts against the sponge belt and the supporting block, the end of the flow guide groove extends out of the separation box, and a water drainage pipe and an oil drainage pipe are arranged at the bottom of the light oil separation chamber and the bottom of the heavy oil separation chamber respectively. In conclusion, the device has the advantages of high working efficiency, thorough tar separation and good oil removal effect.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia evaporation wastewater treatment, in particular to a coking ammonia evaporation wastewater oil removal and separation device. Background Art

[0002] Ammonia distillation is the process of distilling the chemical separation wastewater and residual ammonia produced in the coking process. After the ammonia distillation treatment, the NH3- content can be reduced to obtain ammonia distillation wastewater. The ammonia distillation wastewater contains a high content of tar substances. Tar substances have the characteristics of high density and high freezing point. When the coking ammonia distillation wastewater is transported in the pipeline, a large amount of tar substances will be deposited in the pipeline and equipment. Long-term accumulation of tar substances will also cause blockage of the pipeline and equipment. In order to avoid the above problems, the coking ammonia distillation wastewater is usually deoiled. When performing the deoiling operation, a corresponding deoiling and separation device is usually used. The current coking ammonia distillation wastewater deoiling and separation device has the following problems during use: the treatment process often relies on the wastewater to stand to complete the tar separation, which has low treatment efficiency. At the same time, due to the high fluidity of the liquid, the oil-water separation effect is not good during the oil-water separation operation. Some residual oil will always be discharged with the wastewater, resulting in some tar remaining in the treated wastewater. Therefore, it is an objective need to develop a coking ammonia wastewater oil removal and separation device with high working efficiency, thorough tar separation and good oil removal effect. Utility Model Content

[0003] The purpose of the utility model is to provide a coking ammonia evaporation wastewater oil removal and separation device with high working efficiency, thorough tar separation and good oil removal effect.

[0004] The object of the utility model is achieved in this way, comprising a separation box and a water tank, the interior of the separation box is divided into a light oil separation chamber and a heavy oil separation chamber by a separation layer of oleophilic and hydrophobic material, the separation layer comprises an inclined tube assembly layer and a sponge layer from bottom to top, the light oil separation chamber is provided with a plurality of conical shells with larger upper ports and smaller lower ports, the upper part of the conical shell is tangentially provided with a water inlet pipe, the end of the water inlet pipe extends out of the separation box and is connected with the water tank, a plurality of oil drainage holes are evenly distributed on the circumference of the side wall of the conical shell above the water inlet pipe, the lower end of the conical shell extends into the heavy oil separation chamber, a conveyor belt is obliquely arranged on the upper part of the light oil separation chamber, a sponge belt of oleophilic and hydrophobic material is arranged on the belt surface of the conveyor belt, support blocks and guide grooves are respectively arranged on both sides of the lower belt below the higher end of the conveyor belt, an inclined plate is provided on the guide groove, the upper end of the inclined plate rests on the sponge belt and the support block, the end of the guide groove extends to the outside of the separation box, and a drain pipe and an oil drain pipe are respectively provided at the bottom of the light oil separation chamber and the heavy oil separation chamber.

[0005] Furthermore, the lower end of the inclined plate is rotatably connected to the bottom of the guide groove, and a spring is provided between the middle portion of the inclined plate and the bottom of the guide groove.

[0006] Furthermore, a plurality of inclined jet pipes are respectively provided on the side walls on both sides of the light oil separation chamber, and the jetting directions of the inclined jet pipes are inclined downward.

[0007] Furthermore, the lower port of the cone shell is connected to a buffer plate through a connecting rod.

[0008] Furthermore, the height of the lower end of the conveyor belt is not higher than the height of the location of the drainage pipe.

[0009] Furthermore, a jacket is provided on the outer wall of the heavy oil separation chamber, a wastewater inlet is provided at the bottom of the jacket, a wastewater outlet is provided at the top of the jacket, and the wastewater outlet is connected to the water tank through a pipeline.

[0010] Furthermore, a return pipe is provided between the oil drain pipe and the water tank.

[0011] When the utility model is in operation, the coking ammonia distillation wastewater is first introduced into the water tank, and then divided into multiple water flows through the water inlet pipe. The multiple water flows enter each cone shell tangentially, forming a vortex in the cone shell. According to the principle of different densities and masses of light oil, wastewater and heavy oil, under the action of centrifugal force, the light oil floats up due to its small density, is discharged from the oil discharge hole, and floats on the wastewater surface in the light oil separation chamber. The conveyor belt is started. When the conveyor belt is in operation, the oleophilic and hydrophobic sponge belt arranged on it absorbs the light oil on the wastewater surface and takes the light oil away until it reaches the position of the support block. Under the squeezing action of the inclined plate, the light oil absorbed in the sponge belt is squeezed out, and the light oil flows along the surface of the inclined plate into the guide groove, and then is discharged by the guide groove. The wastewater is sent out of the separation box to complete the separation of light oil in the coking ammonia distillation wastewater. At the same time, the wastewater and heavy oil in the cone shell flow into the heavy oil separation chamber from the bottom. Part of the heavy oil settles naturally under the action of gravity, and part of the heavy oil rises with the wastewater. When it reaches the separation layer, it first contacts the lipophilic and hydrophobic inclined tube component layer to absorb part of the heavy oil in the wastewater, and then contacts the lipophilic and hydrophobic sponge layer to further absorb the remaining heavy oil in the wastewater. The heavy oil continues to gather and grow, and finally falls to the bottom of the heavy oil separation chamber and is discharged through the oil drain pipe. The wastewater after the heavy oil is separated flows into the light oil separation chamber and is discharged through the drain pipe, thereby separating the light oil and heavy oil from the ammonia distillation wastewater to obtain ammonia distillation wastewater that is almost oil-free, which is convenient for the subsequent treatment and utilization of the ammonia distillation wastewater. During use, the utility model utilizes the effect of vortex flow in the cone shell to separate the light oil, and then utilizes the lipophilic and hydrophobic sponge belt provided on the conveyor belt to carry away the light oil, and then utilizes the lipophilic and hydrophobic inclined tube assembly and sponge layer to separate the heavy oil in the wastewater. Compared with the traditional separation process that relies on static completion, the time for separating the light oil and heavy oil from the wastewater is greatly shortened, and the efficiency of oil removal and separation of coking ammonia wastewater is improved; secondly, after the coking wastewater undergoes vortex treatment, sponge belt conveying, separation layer separation and other treatment processes, the light oil and heavy oil can be separated from the wastewater more cleanly and thoroughly, with good oil-water separation effect, and the discharged wastewater basically does not contain light oil and heavy oil, which is convenient for subsequent wastewater treatment and utilization. In summary, the utility model has the advantages of high work efficiency, thorough tar separation, and good oil removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] In the figure: 1-separation box, 2-water tank, 3-light oil separation chamber, 4-heavy oil separation chamber, 5-inclined tube assembly layer, 6-sponge layer, 7-cone shell, 8-water inlet pipe, 9-conveyor belt, 10-sponge belt, 11-support block, 12-guide trough, 13-inclined plate, 14-drain pipe, 15-oil drain pipe, 16-spring, 17-injection inclined tube, 18-buffer plate, 19-jacket, 20-wastewater inlet, 21-wastewater outlet, 22-reflux pipe. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements based on the present invention fall within the scope of protection of the present invention.

[0015] like Figure 1 As shown, the utility model includes a separation box 1 and a water tank 2. The interior of the separation box 1 is divided into a light oil separation chamber 3 and a heavy oil separation chamber 4 by a separation layer of oleophilic and hydrophobic material. The separation layer includes an inclined tube assembly layer 5 and a sponge layer 6 from bottom to top. A plurality of cone shells 7 with large upper ports and small lower ports are provided in the light oil separation chamber 3. A water inlet pipe 8 is tangentially provided on the upper part of the cone shell 7. The end of the water inlet pipe 8 extends out of the separation box 1 and is connected to the water tank 2. A plurality of oil drainage holes are evenly distributed on the circumference of the side wall of the cone shell 7 above the water inlet pipe 8. The lower end of the cone shell 7 extends into The conveyor belt 9 is tilted upwards in the light oil separation chamber 3. A sponge belt 10 made of an oleophilic and hydrophobic material is installed on the conveyor belt 9's surface. Support blocks 11 and a guide trough 12 are installed on either side of the lower belt below the higher end of the conveyor belt 9. A sloping plate 13 is installed on the guide trough 12. The upper end of the sloping plate 13 rests on the sponge belt 10 and support blocks 11, and the end of the guide trough 12 extends outside the separation box 1. A drain pipe 14 and an oil drain pipe 15 are installed at the bottom of the light oil separation chamber 3 and the bottom of the heavy oil separation chamber 4, respectively. The sponge belt 10, the inclined pipe assembly layer 5, and the sponge layer 6 are all conventional and made of oleophilic and hydrophobic materials.

[0016] During operation of the present invention, the coking ammonia distillation wastewater is first introduced into the water tank 2, and then divided into multiple streams through the water inlet pipe 8. The multiple streams enter into each cone shell 7 tangentially, forming a vortex in the cone shell 7. According to the principle of different densities and masses of light oil, wastewater and heavy oil, under the action of centrifugal force, the light oil floats due to its small density, is discharged from the oil discharge hole, and floats on the surface of the wastewater in the light oil separation chamber 3. The conveyor belt 9 is started. When the conveyor belt 9 is in operation, the oleophilic and hydrophobic sponge belt 10 arranged thereon absorbs the light oil on the surface of the wastewater and takes the light oil away until it reaches the position of the support block 11. Under the squeezing action of the inclined plate 13, the light oil absorbed in the sponge belt 10 is squeezed out, and the light oil flows along the surface of the inclined plate 13 into the guide groove 12, and then is taken away by the conveyor belt 9. The guide trough 12 sends the separation box 1 to complete the separation of light oil in the coking ammonia distillation wastewater. At the same time, the wastewater and heavy oil in the cone shell 7 flow into the heavy oil separation chamber 4 from the bottom. Part of the heavy oil naturally settles under the action of gravity, and part of the heavy oil rises with the wastewater. When it reaches the separation layer, it first contacts the lipophilic and hydrophobic inclined tube component layer 5 to absorb part of the heavy oil in the wastewater, and then contacts the lipophilic and hydrophobic sponge layer 6 to further absorb the remaining heavy oil in the wastewater. The heavy oil continues to gather and grow, and finally falls to the bottom of the heavy oil separation chamber 4 and is discharged through the oil discharge pipe 15. The wastewater after the heavy oil is separated flows into the light oil separation chamber 3 and is discharged through the drain pipe 14, thereby separating the light oil and heavy oil from the ammonia distillation wastewater to obtain ammonia distillation wastewater that is almost oil-free, which is convenient for the subsequent treatment and utilization of the ammonia distillation wastewater.

[0017] During use, the utility model utilizes the effect of cyclone in the cone shell 7 to separate the light oil, and then utilizes the oleophilic and hydrophobic sponge belt 10 provided on the conveyor belt 9 to take away the light oil, and then utilizes the oleophilic and hydrophobic inclined tube component layer 5 and the sponge layer 6 to separate the heavy oil in the wastewater. Compared with the traditional separation process that relies on standing to complete, the time for separating the light oil and heavy oil from the wastewater is greatly shortened, and the working efficiency of oil removal and separation of coking ammonia evaporation wastewater is improved; secondly, after the coking wastewater undergoes cyclone treatment, sponge belt 10 transportation, separation layer separation and other treatment processes, the light oil and heavy oil can be separated from the wastewater more cleanly and thoroughly, with a good oil-water separation effect, and the discharged wastewater basically does not contain light oil and heavy oil, which is convenient for subsequent wastewater treatment and utilization.

[0018] The lower end of the inclined plate 13 is rotatably connected to the bottom of the guide groove 12, and a spring 16 is provided between the middle of the inclined plate 13 and the bottom of the guide groove 12. The inclined plate 13 is used to squeeze out the light oil adsorbed on the sponge belt 10. However, as the use time increases, due to wear, installation error or some other reasons, the distance between the upper end of the inclined plate 13 and the conveyor belt 9 will increase, and the light oil adsorbed in the sponge belt 10 cannot be squeezed out, affecting the separation effect of the light oil. For this purpose, a spring 16 is provided. The spring 16 has a certain pre-tightening force and can generate a pulling force on the inclined plate 13, so that the upper end of the inclined plate 13 can always be close to the sponge belt 10, ensuring the extrusion effect of the light oil, and thus ensuring the separation effect of the light oil.

[0019] Several jet inclined tubes 17 are respectively provided on the side walls on both sides of the light oil separation chamber 3, and the jet direction of the jet inclined tubes 17 is inclined downward. During the implementation of the present utility model, the oleophilic and hydrophobic sponge belt 10 provided on the conveyor belt 9 is used to adsorb and carry away the light oil. However, during the actual adsorption process, it is found that the light oil floating on the surface of the wastewater has a flow dead angle. There will always be some light oil floating on the surface of the wastewater of the original conveyor belt 9, resulting in this part of the light oil not being quickly adsorbed. In order to solve this problem, the jet inclined tubes 17 are provided. When in use, compressed air is introduced into the jet inclined tubes 17, and the air is blown toward the surface of the wastewater, thereby blowing the light oil on the surface of the wastewater, causing the light oil to move toward the direction of the conveyor belt 9, thereby achieving the purpose of light oil adsorption.

[0020] The lower port of the conical shell 7 is connected to a buffer plate 18 through a connecting rod. When the utility model performs oil-water separation, the heavy oil is deposited at the bottom of the heavy oil separation chamber 4, and the new wastewater flows out from the bottom of the conical shell 7, which will impact the deposited heavy oil, affecting the separation effect and efficiency of the heavy oil. After the buffer plate 18 is set, the wastewater flowing downward will impact the buffer plate 18, and then flow out from the four sides of the buffer plate 18. The buffer plate 18 plays a role in dispersing the water flow, reducing the impact of the water flow on the deposited heavy oil, preventing the heavy oil from being rolled up by the water flow, and improving the separation efficiency and effect of the heavy oil.

[0021] The height of the lower end of the conveyor belt 9 is not higher than the height of the drain pipe 14. In the present invention, light oil with lower density floats on the surface of the wastewater, and the oleophilic and hydrophobic sponge belt 10 provided on the conveyor belt 9 is used to adsorb and carry away the light oil, and the drain pipe 14 is used to discharge the wastewater after deoiling. If the height of the lower end of the conveyor belt 9 is higher than the height of the drain pipe 14, then when the water level of the wastewater is at a height between the lower end of the conveyor belt 9 and the drain pipe 14, the light oil on the water surface cannot be adsorbed, and the light oil will be discharged together with the wastewater, affecting the deoiling effect of the wastewater. Therefore, in order to ensure that the discharged wastewater does not contain light oil, the height of the lower end of the conveyor belt 9 is not higher than the height of the drain pipe 14. In actual use, the conveyor belt 9 can be set to an angle-adjustable structure. The installation angle of the conveyor belt 9 is determined according to the wastewater liquid level, so that the light oil floating on the surface of the wastewater can be adsorbed.

[0022] A jacket 19 is provided on the outer wall of the heavy oil separation chamber 4, a wastewater inlet 20 is provided at the bottom of the jacket 19, and a wastewater outlet 21 is provided at the top of the jacket 19. The wastewater outlet 21 is connected to the water tank 2 through a pipe. Considering that the lower the temperature, the viscosity of the heavy oil will increase and the fluidity will decrease, which is not convenient for the discharge of the heavy oil. Therefore, a jacket 19 is provided on the outer wall of the heavy oil separation chamber 4, and ammonia distilled wastewater is passed into the jacket 19. The heat contained in the ammonia distilled wastewater itself is used to heat and insulate the heavy oil deposited in the heavy oil separation chamber 4, thereby preventing the heavy oil temperature from being too low, ensuring the fluidity of the heavy oil, facilitating the discharge of the heavy oil, and preventing blockage.

[0023] A return pipe 22 is provided between the oil discharge pipe 15 and the water tank 2. The oil discharge pipe 15 is used to discharge the heavy oil deposited at the bottom of the heavy oil separation chamber 4. After the heavy oil is basically discharged, a large amount of wastewater will be discharged together with the remaining small amount of heavy oil, resulting in a large amount of wastewater contained in the heavy oil. In order to avoid this situation, the return pipe 22 is provided. During the heavy oil discharge process, when the heavy oil is basically discharged, the discharge of the heavy oil can be stopped, and the remaining small amount of heavy oil and wastewater can be returned to the water tank 1 together, and then the wastewater containing heavy oil can be deoiled again. This can not only prevent the heavy oil from containing a large amount of wastewater, but also prevent the wastewater from containing heavy oil, thereby improving the purity of the heavy oil after separation.

Claims

1. A coking ammonia evaporation wastewater oil removal and separation device, comprising a separation box (1) and a water tank (2), characterized in that The interior of the separation box (1) is divided into a light oil separation chamber (3) and a heavy oil separation chamber (4) by a separation layer of oleophilic and hydrophobic material. The separation layer includes an inclined tube assembly layer (5) and a sponge layer (6) from bottom to top. A plurality of cone shells (7) with larger upper ports and smaller lower ports are provided in the light oil separation chamber (3). A water inlet pipe (8) is tangentially provided on the upper part of the cone shell (7). The end of the water inlet pipe (8) extends out of the separation box (1) and is connected to the water tank (2). A plurality of oil drain holes are evenly distributed on the circumference of the side wall of the cone shell (7) above the water inlet pipe (8). The lower end of the cone shell (7) extends into the heavy oil separation chamber (4). A conveyor belt (9) is arranged at an angle on the upper part of the light oil separation chamber (3), and a sponge belt (10) made of an oleophilic and hydrophobic material is arranged on the belt surface of the conveyor belt (9). Support blocks (11) and guide grooves (12) are respectively arranged on both sides of the lower belt below the higher end of the conveyor belt (9). An inclined plate (13) is arranged on the guide groove (12), and the upper end of the inclined plate (13) abuts against the sponge belt (10) and the support block (11). The end of the guide groove (12) extends to the outside of the separation box (1). A drainage pipe (14) and an oil drainage pipe (15) are respectively arranged at the bottom of the light oil separation chamber (3) and the heavy oil separation chamber (4).

2. The coking ammonia distillation wastewater oil removal and separation device according to claim 1, characterized in that: The lower end of the inclined plate (13) is rotatably connected to the bottom of the guide groove (12), and a spring (16) is provided between the middle of the inclined plate (13) and the bottom of the guide groove (12).

3. The oil removal and separation device for coking ammonia distillation wastewater according to claim 1, characterized in that: A plurality of inclined jet pipes (17) are respectively provided on the side walls on both sides of the light oil separation chamber (3), and the jetting direction of the inclined jet pipes (17) is inclined downward.

4. The oil removal and separation device for coking ammonia distillation wastewater according to claim 1, characterized in that: The lower port of the cone shell (7) is connected to a buffer plate (18) via a connecting rod.

5. The oil removal and separation device for coking ammonia distillation wastewater according to claim 1, characterized in that: The height of the lower end of the conveyor belt (9) is not higher than the height of the location of the drainage pipe (14).

6. The oil removal and separation device for coking ammonia distillation wastewater according to claim 1, characterized in that: A jacket (19) is provided on the outer wall of the heavy oil separation chamber (4), a wastewater inlet (20) is provided at the bottom of the jacket (19), and a wastewater outlet (21) is provided at the top of the jacket (19), and the wastewater outlet (21) is connected to the water tank (2) through a pipeline.

7. The coking ammonia distillation wastewater oil removal and separation device according to claim 1, characterized in that: A return pipe (22) is provided between the oil drain pipe (15) and the water tank (2).

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