Marine oily sewage pretreatment system with waste heat utilization function

Abstract

The utility model discloses a ship oily sewage pretreatment system with a waste heat utilization function, which comprises a preheating box, a waste heat utilization device, a waste heat utilization device, a waste heat utilization device and a waste heat utilization device, and is characterized in that the preheating box is provided with a liquid inlet and a liquid outlet and is internally provided with a preheating device; the heating box is provided with a liquid passing opening, an oil outlet and a water outlet, and a heating device is arranged in the heating box; the water collecting container is used for intensively accommodating the sewage which is heated and shunted by the heating box; the oil collecting container is used for centrally accommodating the oil liquid which is heated and shunted by the heating box; the liquid supply pipeline is sequentially connected with the liquid outlet of the preheating box and the liquid passing opening of the heating box; and the first shunting pipeline is sequentially connected with the oil outlet of the heating box and the oil collecting container. The second shunting pipeline is sequentially connected with the water outlet of the heating box, the heating device and the water collecting container; waste heat of sewage can be used as a heat source of the preheater, oil-containing sewage is preheated in a heat exchange mode, energy consumption is effectively reduced, and treatment cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship oily sewage treatment equipment, in particular to a ship oily sewage pretreatment system with a waste heat utilization function. Background Art

[0002] Ship pollution is an important source of pollution in offshore and port waters. Among them, a large amount of oily wastewater generated by the cleaning of oil tankers and cargo ships is an important ship pollutant; ship oily wastewater is mainly generated in the process of cleaning the cargo holds and oil tanks of oil tankers and cargo ships, and is generally a mixture of crude oil, heavy oil, engine oil and water; oil exists in water in various forms such as floating oil, dispersed oil, emulsified oil, dissolved oil, etc., except for floating oil, it is difficult to effectively separate oil and water by conventional physical methods; for this reason, it is necessary to pre-treat the wastewater containing oil, mainly by heating the oily wastewater to increase the temperature of the oily wastewater, reduce the viscosity of the oil, promote the aggregation of oil droplets, and make it easier to separate oil and water; at the same time, temperature changes promote convection and accelerate the buoyancy of oil, thereby achieving faster, more effective and more thorough oil-water separation; the pre-treated oil and wastewater are respectively contained in containers; however, when heating the oily wastewater, a large amount of resources are required for heating, and the energy consumption is large, while the wastewater after oil-water separation is directly contained in the container for subsequent treatment, and the residual heat retained in the wastewater is not utilized, resulting in a waste of resources and difficulty in reducing the cost of oily wastewater treatment. Utility Model Content

[0003] The utility model aims to provide a ship oily sewage pretreatment system with a waste heat utilization function, which can utilize the waste heat of the pretreated sewage, thereby reducing energy consumption and lowering treatment costs.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A ship oily wastewater pretreatment system with waste heat utilization function, comprising:

[0006] A preheating box, the preheating box has a liquid inlet and a liquid outlet, and a preheating device is arranged inside the preheating box;

[0007] A heating box, the heating box has a liquid outlet, an oil outlet and a water outlet, and a heating device is arranged inside the heating box;

[0008] A water collection container, used to centrally contain the sewage after being heated and diverted by the heating box;

[0009] An oil collecting container, used for centrally accommodating the oil after being heated and diverted by the heating box;

[0010] A liquid supply pipeline, connected in sequence to the liquid outlet of the preheating box and the liquid outlet of the heating box;

[0011] A first shunt pipeline is connected in sequence to the oil outlet of the heating box and the oil collecting container;

[0012] The second shunt pipeline sequentially connects the water outlet of the heating box, the heating device and the water collecting container.

[0013] On the basis of the above technical solution, the present invention can be improved as follows:

[0014] Furthermore, the preheating box comprises a preheating box body, the preheating box body is provided with a preheating box cover at the box opening, the preheating box cover 1 is provided with a liquid inlet for connecting to a sewage pipe, and the bottom side wall of the preheating box body is provided with the liquid outlet.

[0015] Furthermore, the preheating device is a heat exchange tube, and the liquid inlet end and the liquid outlet end of the heat exchange tube extend from the bottom surface of the preheating box cover to the top surface; the preheating box cover closes the box opening of the preheating box body, and the heat exchange tube is placed in the preheating box, and the heat exchange tube extends in a circuitous manner in the preheating box to form a plurality of pipe sections, and there is a gap between two adjacent pipe sections through which oily wastewater can flow.

[0016] Furthermore, a plurality of external fins arranged at intervals are provided on the outer surface of the heat exchange tube.

[0017] Furthermore, the heating box includes a heating box body, which is provided with a heating box cover at the box opening; a liquid port is provided on the heating box cover, the water outlet is provided on the bottom side wall of the heating box body, and the oil outlet is provided on the side wall of the heating box body at a set height.

[0018] Furthermore, a first solenoid valve is provided at the oil outlet of the heating box, and a second solenoid valve is provided at the water outlet of the heating box.

[0019] Furthermore, the heating device is an immersion steam nozzle, which is fixedly mounted on the inner wall of the heating box body; the immersion steam nozzle includes an annular tube corresponding to the inner diameter of the heating box body, and a plurality of nozzles arranged at equal intervals on the annular tube, an air pipe is connected to the annular tube, and the end of the air pipe extends from the bottom surface of the heating box cover to the top surface and is connected to an external steam generator.

[0020] Furthermore, three submerged steam nozzles are provided, and the three submerged steam nozzles are distributed at intervals along the axial direction of the heating box.

[0021] Furthermore, there are three oil outlets, which are spaced apart along the axial direction of the heating box, and are connected to the oil collecting container through pipelines in parallel; a liquid level sensor is provided at the oil outlet on the inner side of the heating box body.

[0022] Furthermore, a liquid supply pump is provided on the liquid supply pipeline, a first shunt pump is provided on the first shunt pipeline, and a second shunt pump is provided on the second shunt pipeline.

[0023] Compared with the prior art, the utility model technology has the following advantages:

[0024] The utility model sets a first shunt pipeline to allow the sewage after oil-water separation to flow through a preheater, utilizes the waste heat of the sewage as the heat source of the preheater, and preheats the oily sewage in a heat exchange manner, thereby effectively reducing energy consumption and saving treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 It is a structural schematic diagram of a ship oily wastewater pretreatment system with waste heat utilization function in the utility model.

[0027] Markings on the accompanying drawings: 1-preheating box, 101-preheating box body, 102-preheating box cover, 103-liquid inlet, 2-heating box, 201-heating box body, 202-heating box cover, 203-insulation layer, 3-water collecting container, 4-oil collecting container, 5-liquid supply pipeline, 6-first diversion pipeline, 7-second diversion pipeline, 8-heat exchange tube, 9-external fin, 10-first solenoid valve, 11-second solenoid valve, 12-immersed steam nozzle, 13-air pipe, 14-first diversion pump, 15-second diversion pump, 16-liquid supply pump, 17-liquid level sensor, 18-sampling port. DETAILED DESCRIPTION

[0028] The following is a further description of the specific embodiments of the present invention in conjunction with the accompanying drawings. The description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] See also Figure 1 The utility model relates to a ship oily wastewater pretreatment system with waste heat utilization function, comprising:

[0030] A preheating box 1 is used for centrally preheating the oily wastewater. The preheating box 1 has a liquid inlet 103 and a liquid outlet. A preheating device for preheating the oily wastewater is arranged inside the preheating box 1.

[0031] The heating box 2 is used for centrally heating the oily wastewater preheated by the preheating box 1 and separating oil and water. The heating box 2 has a liquid outlet, an oil outlet and a water outlet. The heating box 2 is provided with a heating device for heating the preheated oily wastewater.

[0032] The water collecting container 3 is used to centrally contain the sewage after being heated and diverted by the heating box 2;

[0033] The oil collecting container 4 is used to centrally contain the oil after being heated and diverted by the heating box 2;

[0034] The liquid supply pipeline 5 is connected to the liquid outlet of the preheating box 1 and the liquid outlet of the heating box 2 in sequence;

[0035] The first branch pipeline 6 is connected to the oil outlet of the heating box 2 and the oil collecting container 4 in sequence;

[0036] The second branch pipeline 7 is connected to the water outlet of the heating box 2, the heating device and the water collecting container 3 in sequence.

[0037] The oily wastewater flows into the preheating box 1 from the liquid inlet 103 of the preheating box 1, and after being preheated by the preheating device, flows out from the liquid outlet of the preheating box 1 and flows into the heating box 2 along the liquid supply pipeline 5. After being heated by the heating device and standing for oil and water separation, the oil flows out from the oil outlet of the heating device and flows into the oil collecting container 4 along the second branch pipeline 7, and the wastewater flows out from the water outlet of the heating device and flows into the water collecting container 3 along the first branch pipeline 6. When the wastewater after oil and water separation flows through the preheater, the waste heat of the wastewater is used as the heat source of the preheater to preheat the oily wastewater in a heat exchange manner, which effectively reduces energy consumption and saves treatment costs.

[0038] Specifically, the preheating box 1 includes a preheating box body 101, which is a hollow cylindrical structure, and a preheating chamber for accommodating a preheating device is formed inside the preheating box body 101; a box opening is formed at the top of the preheating box body 101, and a preheating box cover 102 is provided at the box opening of the preheating box body 101; a liquid inlet 103 is provided on the preheating box cover 102, and the liquid inlet 103 is used to connect to a sewage pipe, and a liquid outlet is provided on the bottom side wall of the preheating box body 101; the oily wastewater enters the preheating box 1 from the liquid inlet 103, and after being preheated by the preheating device, it flows out from the liquid outlet and flows into the interior of the heating box 2 along the liquid supply pipeline 5.

[0039] The preheating box cover 102 is provided with a first through hole and a second through hole; the preheating device is a heat exchange tube 8, one end of the heat exchange tube 8 is a liquid inlet end and extends from the bottom surface of the preheating box cover 102 to the top surface through the first through hole, and the other end of the heat exchange tube 8 is a liquid outlet end and extends from the bottom surface of the preheating box cover 102 to the top surface through the second through hole; the preheating box cover 102 closes the box opening of the preheating box body 101, and places the heat exchange tube 8 in the preheating box 1, and the heat exchange tube 8 extends in a circuitous manner in the preheating chamber to form a plurality of pipe sections, and there is a gap between two adjacent pipe sections, and the oily wastewater can flow in the gap to complete the preheating; during preheating, the wastewater after oil and water separation flows in the heat exchange tube 8, and the waste heat of the wastewater is conducted to the heat exchange tube 8 to preheat the wastewater.

[0040] A plurality of spaced apart external fins 9 are provided on the outer surface of the heat exchange tube 8. The external fins 9 absorb the heat from the heat transfer tube and contact with the oily wastewater to complete heat exchange. The external fins 9 can increase the contact area with the oily wastewater, thereby improving the preheating efficiency.

[0041] The heating box 2 includes a heating box body 201, which is a hollow cylindrical structure. The heating box body 201 is provided with a heat-insulating layer 203 to reduce heat loss. A heating chamber for accommodating a heating device is formed inside the heating box body 201. A box opening is formed at the top of the heating box body 201, and a heating box cover 202 is provided at the box opening of the heating box body 201. A liquid through hole is provided on the heating box cover 202, a water outlet is provided on the bottom side wall of the heating box body 201, and an oil outlet is provided on the side wall of the heating box body 201 at a set height. The preheated oily sewage enters the interior of the heating box 2 from the liquid through hole, and after being heated After the device is heated, the oil and water are allowed to stand to separate and form stratified layers. Since the density of the oil is greater than that of the liquid, the stratified oil layer floats above the sewage layer. At this time, the oil outlet is opened and the water outlet is closed, and the stratified oil flows out of the heating box 2 from the oil outlet and flows along the first diversion pipeline 6 to the oil collecting container 4. When the liquid level drops to the set height position of the heating box 2, the oil outlet is closed and the water outlet is opened, and the stratified sewage flows out of the heating box 2 from the water outlet and flows along the second diversion pipeline 7 to the water collecting container 3. A first solenoid valve 10 is provided at the oil outlet of the heating box 2, and a second solenoid valve 11 is provided at the water outlet of the heating box 2.

[0042] A through hole is provided on the heating box cover 202; the heating device is an immersion steam nozzle 12, which is fixedly mounted on the inner wall of the main body of the heating box 2; the immersion steam nozzle 12 is a conventional steam heating device in the prior art, comprising an annular tube corresponding to the inner diameter of the heating box main body 201, and a plurality of nozzles arranged at equal intervals on the annular tube, the annular tube is connected with an air pipe 13, the end of the air pipe 13 extends from the bottom surface of the heating box cover 202 to the top surface through the through hole on the heating box cover 202 and is connected to an external steam generator; the steam generator generates steam, and the steam is transported along the air pipe 13 to the immersion steam nozzle 12 for spraying to complete the heating of the oily wastewater, and the steam temperature in this embodiment is 160°C to 180°C; by spraying steam into the oily wastewater for heating, the flow of the liquid can be accelerated and the heat can promote the separation of oil and water.

[0043] In the present embodiment, four immersion steam nozzles 12 are provided, and the four immersion steam nozzles 12 are spaced apart along the axial direction of the heating box 2 to improve the heating efficiency of the sewage. The number of immersion steam nozzles 12 can also be adjusted accordingly according to actual needs.

[0044] In the present embodiment, three oil outlets are provided, and the three oil outlets are spaced apart along the axial direction of the heating box 2. The three oil outlets are connected in parallel with the oil collecting container 4 through pipelines; oil at different liquid level heights can be discharged through the three oil outlets, and the number and position heights of the oil outlets can be adjusted accordingly according to actual needs; a liquid level sensor 17 is provided at the oil outlet on the inner side of the heating box body 201, and the internal liquid level height is monitored by the liquid level sensor 17, and the acquired liquid level height data is fed back to an external controller, and the controller controls the first solenoid valve 10 and the second solenoid valve 11 to open and close or adjust the opening according to the liquid level height data, so as to discharge oil and sewage respectively, and control the displacement.

[0045] The outside of the heating box body 201 is provided with openable and closable sampling ports 18 near the oil outlet and the water outlet. Samples are taken through the sampling ports 18 to understand the oil-water separation of the oily wastewater.

[0046] A liquid supply pump 16 is arranged on the liquid supply pipeline 5, and the liquid supply pump 16 is used for accelerating the delivery of preheated oily wastewater to the heating box 2; a first diversion pump 14 is arranged on the first diversion pipeline 6, and the first diversion pump 14 is used for accelerating the delivery of oil to the oil collecting container 4; a second diversion pump 15 is arranged on the second diversion pipeline 7, and the second diversion pump 15 is used for accelerating the delivery of wastewater to the preheater to reduce the waste heat loss of wastewater during the delivery process; the liquid supply pump 16, the first diversion pump 14 and the second diversion pump 15 are all conventional water pumps in the prior art. Through the cooperation of single water pumps, the oil-water separation efficiency of the oily wastewater treatment can be improved, and the waste heat recovery rate can be improved.

[0047] In this embodiment, the water collecting container 3 and the oil collecting container 4 are both hollow tanks, which can be replaced by pools according to actual needs.

[0048] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A ship oily wastewater pretreatment system with waste heat utilization function, characterized in that: include: A preheating box, the preheating box has a liquid inlet and a liquid outlet, and a preheating device is arranged inside the preheating box; A heating box, the heating box has a liquid outlet, an oil outlet and a water outlet, and a heating device is arranged inside the heating box; A water collection container, used to centrally contain the sewage after being heated and diverted by the heating box; An oil collecting container, used for centrally accommodating the oil after being heated and diverted by the heating box; A liquid supply pipeline, connected in sequence to the liquid outlet of the preheating box and the liquid outlet of the heating box; A first shunt pipeline is connected in sequence to the oil outlet of the heating box and the oil collecting container; The second shunt pipeline sequentially connects the water outlet of the heating box, the heating device and the water collecting container.

2. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 1 is characterized in that: The preheating box comprises a preheating box body, the preheating box body is provided with a preheating box cover at the box opening, the preheating box cover (102) is provided with a liquid inlet for connecting to a sewage pipe, and the bottom side wall of the preheating box body is provided with the liquid outlet.

3. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 2 is characterized in that: The preheating device is a heat exchange tube, and the liquid inlet and liquid outlet of the heat exchange tube extend from the bottom surface of the preheating box cover to the top surface; the preheating box cover closes the box opening of the preheating box body and places the heat exchange tube in the preheating box. The heat exchange tube extends in a circuitous manner in the preheating box to form a plurality of pipe sections, and there is a gap between two adjacent pipe sections for flowing oily wastewater.

4. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 3 is characterized in that: A plurality of external fins arranged at intervals are arranged on the outer surface of the heat exchange tube.

5. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 1 is characterized in that: The heating box comprises a heating box body, which is provided with a heating box cover at the box opening; a liquid through hole is provided on the heating box cover, the water outlet is provided on the bottom side wall of the heating box body, and the oil outlet is provided on the side wall of the heating box body at a set height.

6. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 5 is characterized in that: A first solenoid valve is arranged at the oil outlet of the heating box, and a second solenoid valve is arranged at the water outlet of the heating box.

7. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 5 is characterized in that: The heating device is an immersion steam nozzle, which is fixedly mounted on the inner wall of the heating box body; the immersion steam nozzle includes an annular tube corresponding to the inner diameter of the heating box body, and a plurality of nozzles arranged at equal intervals on the annular tube, an air pipe is connected to the annular tube, and the end of the air pipe extends from the bottom surface of the heating box cover to the top surface and is connected to an external steam generator.

8. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 7 is characterized in that: The number of the submerged steam spray heads is three, and the three submerged steam spray heads are distributed at intervals along the axial direction of the heating box.

9. The ship oily wastewater pretreatment system with waste heat utilization function according to claim 5 is characterized in that: There are three oil outlets, which are spaced apart along the axial direction of the heating box. The three oil outlets are connected to the oil collecting container in parallel through pipelines. A liquid level sensor is provided at the oil outlet on the inner side of the heating box body.

10. The ship oily wastewater pretreatment system with waste heat utilization function according to any one of claims 1 to 9, characterized in that: The liquid supply pipeline is provided with a liquid supply pump, the first shunt pipeline is provided with a first shunt pump, and the second shunt pipeline is provided with a second shunt pump.

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