Equipment for recycling hydrocarbon cleaning agent and reducing industrial wastewater

Abstract

The invention relates to equipment for recycling a hydrocarbon cleaning agent and reducing industrial wastewater, which belongs to the technical field of evaporation and concentration and comprises a distillation kettle, an evaporator, a first partition plate heat exchanger, a second partition plate heat exchanger, a cleaning agent liquid storage tank and a distilled water liquid storage tank, the distillation still is connected with the first partition plate heat exchanger and the second partition plate heat exchanger through the evaporator, the first partition plate heat exchanger is connected with the cleaning agent storage tank, the second partition plate heat exchanger is connected with the distilled water storage tank, the first partition plate heat exchanger is connected with the distillation still, and the second partition plate heat exchanger is connected with the evaporator. The equipment can simultaneously treat the waste cleaning agent and the waste water, does not need a cooling-water machine of traditional recovery equipment and a core part compressor of an evaporator, greatly saves equipment cost, and greatly reduces waste liquid treatment cost.

Description

Technical Field

[0001] The invention belongs to the technical field of evaporation and concentration, and in particular relates to a device for recovering hydrocarbon cleaning agents and reducing industrial waste water. Background Art

[0002] Existing hydrocarbon recovery equipment and industrial wastewater reduction equipment require a lot of electricity and generate a lot of heat during operation. This heat is not used but needs to be consumed by chillers, wasting a lot of heat and energy. Hydrocarbon recovery and industrial wastewater reduction require multiple devices, consume a lot of electricity, and have low processing efficiency.

[0003] The prior art CN214211513U discloses a horizontal distillation kettle for a vacuum cleaning machine, which introduces wastewater into the tank body through the feed port, and then heats the wastewater with a heater, so that the water in the wastewater is vaporized and discharged from the exhaust port, while the hydrocarbon cleaning agent remains on the inner wall of the tank body and is discharged from the discharge port for collection, thus completing the distillation process, and using a stirring component to stir the wastewater in the tank body, so that the water body is heated evenly and the vaporization process is accelerated, and after use, the cleaning component is used to spray and clean the inner wall of the tank body, and the residue is rinsed and discharged from the discharge port. Therefore, the problem of a large amount of heat energy generated in the subsequent hydrocarbon recovery process not being utilized is not solved, and a large amount of heat energy is wasted. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention proposes: a device for recovering hydrocarbon cleaning agents and reducing industrial wastewater, comprising a distillation kettle, an evaporator, a first baffle heat exchanger, a second baffle heat exchanger, a cleaning agent storage tank and a distilled water storage tank, an electric heating device is arranged at the bottom of the distillation kettle, the distillation kettle is connected to the first baffle heat exchanger and the second baffle heat exchanger through the evaporator, the first baffle heat exchanger is connected to the cleaning agent storage tank, the second baffle heat exchanger is connected to the distillation kettle, and the second baffle heat exchanger is connected to the evaporator.

[0005] Furthermore, a first branch is connected in parallel to the cleaning agent storage tank, and a first vacuum pump is arranged on the first branch; a second branch is connected in parallel to the distilled water storage tank, and a second vacuum pump is arranged on the second branch.

[0006] Furthermore, an evaporator shell side and an evaporator tube side are arranged in the evaporator.

[0007] Furthermore, the first baffle heat exchanger is provided with a first baffle heat exchanger shell side, a first baffle heat exchanger waste tube side,

[0008] Furthermore, the second baffle heat exchanger is provided with a second baffle heat exchanger shell side, a second baffle heat exchanger tube side,

[0009] Furthermore, a liquid outlet is arranged on the cleaning agent storage tank.

[0010] Furthermore, a liquid discharge port is arranged on the distillation kettle.

[0011] Furthermore, a first liquid level sensor is arranged on the evaporator.

[0012] Furthermore, a second liquid level sensor is arranged on the distillation kettle.

[0013] Furthermore, a temperature sensor is arranged on the distillation kettle.

[0014] The beneficial effects of the present invention are:

[0015] The 130° C. cleaning agent steam of the present invention provides a heat source for wastewater evaporation, thereby saving the extra energy required for wastewater evaporation, saving a large amount of electric energy, and being energy-saving and environmentally friendly.

[0016] At the same time, the new cleaning agent liquid and waste water vapor preheat the waste cleaning agent and waste water at room temperature, saving the energy consumption required for distillation and heating of the waste cleaning agent, greatly shortening the heating time and improving the processing efficiency.

[0017] This equipment can process waste cleaning agents and waste water at the same time, without the need for the compressor, the core component of the chiller and evaporator of traditional recovery equipment, which greatly saves equipment costs and greatly reduces waste liquid treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the equipment for recovering hydrocarbon cleaning agent and reducing industrial wastewater according to the present invention;

[0019] Wherein, the accompanying drawings are marked as follows:

[0020] 1. Electric heating device, 2. Distillation kettle, 3. Evaporator shell side, 4. Evaporator tube side, 5. First baffle heat exchanger shell side, 6. First baffle heat exchanger tube side, 7. Second baffle heat exchanger shell side, 8. Second baffle heat exchanger tube side, 9. Cleaning agent storage tank, 10. Distilled water storage tank, 11. First vacuum pump, 12. Second vacuum pump, 13. First liquid outlet, 14. Second liquid outlet, 15. Discharge port, 16. Drain port, 17. First liquid level sensor, 18. Second liquid level sensor, 19. Temperature sensor. DETAILED DESCRIPTION

[0021] In order to make the technical means adopted by the present invention and the purpose achieved easy to understand, the present invention is further explained in combination with a specific implementation method below. A device for recovering hydrocarbon cleaning agents and reducing industrial wastewater includes a distillation kettle 2, an evaporator, a first baffle heat exchanger, a second baffle heat exchanger, a cleaning agent storage tank 9 and a distilled water storage tank 10. An electric heating device 1 is arranged at the bottom of the distillation kettle 2. The distillation kettle 2 is connected to the first baffle heat exchanger and the second baffle heat exchanger through the evaporator, respectively. The first baffle heat exchanger is connected to the cleaning agent storage tank 9, the second baffle heat exchanger is connected to the distillation water storage tank 10, the first baffle heat exchanger is connected to the distillation kettle 2, and the second baffle heat exchanger is connected to the evaporator.

[0022] The cleaning agent storage tank 9 is connected in parallel with a first branch, on which a first vacuum pump 11 is arranged, and the distilled water storage tank 10 is connected in parallel with a second branch, on which a second vacuum pump 12 is arranged.

[0023] Wherein, an evaporator shell side 3 and an evaporator tube side 4 are arranged in the evaporator.

[0024] Wherein, a first baffle heat exchanger shell side 5 and a first baffle heat exchanger tube side 6 are arranged in the first baffle heat exchanger.

[0025] Wherein, a second baffle heat exchanger shell side 7 and a second baffle heat exchanger tube side 8 are arranged in the second baffle heat exchanger.

[0026] Wherein, the cleaning agent storage tank 9 is provided with a liquid outlet 13 .

[0027] Wherein, a liquid discharge port 16 is arranged on the distillation kettle 2.

[0028] Wherein, a first liquid level sensor 17 is arranged on the evaporator.

[0029] Wherein, a second liquid level sensor 18 is arranged on the distillation kettle 2.

[0030] Wherein, a temperature sensor 19 is arranged on the distillation kettle 2.

[0031] The functions of each component are as follows:

[0032] Electric heating 1: heating the waste cleaning agent;

[0033] Distillation kettle 2: distill the waste cleaning agent;

[0034] Evaporator shell side 3: contains new cleaning agent liquid and part of the cleaning agent steam;

[0035] Evaporator tube 4: containing waste water;

[0036] The first baffle heat exchanger shell side 5: contains new cleaning agent liquid and part of the cleaning agent steam;

[0037] First baffle heat exchanger tube 6: containing waste cleaning agent;

[0038] The second baffle heat exchanger shell side 7: containing distilled water;

[0039] The second baffle heat exchanger tube 8: contains industrial wastewater;

[0040] Cleaning agent storage tank 9: for storing the new cleaning agent obtained by distillation;

[0041] Distilled water storage tank 10: for storing distilled water;

[0042] The first vacuum pump 11: vacuuming;

[0043] The second vacuum pump 12: vacuuming;

[0044] The first liquid outlet 13 is used to discharge new cleaning liquid;

[0045] The second liquid outlet 14 is used for discharging distilled water;

[0046] Discharge port 15: discharge of wastewater concentrate;

[0047] Drain port 16: discharges waste cleaning agent concentrate;

[0048] First liquid level sensor 17: detects the liquid level of industrial waste water;

[0049] Second liquid level sensor 18: detects the liquid level of the waste cleaning agent;

[0050] Temperature sensor 19: detects the temperature of the waste cleaning agent.

[0051] The working process of the device of the present invention is as follows:

[0052] After the equipment is turned on, the vacuum pump 11 is started, and the waste cleaning agent enters the distillation kettle 2 through the first baffle heat exchanger tube 6. The electric heating device 1 starts heating, and the liquid inlet stops after the liquid level reaches the second liquid level sensor 18. When the temperature sensor 19 detects the boiling temperature, the waste cleaning agent begins to evaporate. The second vacuum pump 12 is started, and the industrial waste water enters the evaporator tube 4 through the second baffle heat exchanger tube 8. The liquid inlet stops after the liquid level reaches the first liquid level sensor 17.

[0053] The waste cleaning agent has a boiling point of about 130°C in the distillation kettle 2 at a pressure of 50mbar. After the waste cleaning agent reaches the boiling point and evaporates, the cleaning agent vapor enters the wastewater in the evaporator tube 4 at room temperature, and the cleaning agent vapor and wastewater exchange heat. The wastewater temperature gradually rises and reaches a boiling state at about 60°C.

[0054] The new cleaning agent liquid and part of the cleaning agent steam liquefied in the evaporator shell side 3 enter the first baffle heat exchanger shell side 5, and further exchange heat with the waste cleaning agent in the first baffle heat exchanger tube side 6 to preheat the waste cleaning agent. The remaining heat energy is used again. After the new cleaning agent liquid reaches a certain liquid level, it enters the cleaning agent storage tank 9 and is automatically discharged from the liquid outlet 13. The preheated waste cleaning agent enters for distillation, and the waste cleaning agent in the distillation kettle 2 is continuously replenished and evaporated, and the concentration increases. The cleaning agent storage tank 9 no longer discharges liquid, and the waste cleaning agent liquid inlet switch is closed. This cycle is completed, and the concentrated liquid is discharged from the liquid outlet 16.

[0055] The wastewater boils and evaporates in the evaporator tube 4, and the steam enters the second baffle heat exchanger shell 7 to exchange heat with the wastewater in the second baffle heat exchanger tube 8. The steam condenses into water and enters the distilled water storage tank 10. After reaching a certain liquid level, it is automatically discharged from the discharge port 14. After heat exchange, the wastewater enters the evaporator tube 4 for evaporation. With continuous replenishment and evaporation, when the wastewater in the evaporator tube 4 reaches the set concentration ratio, the concentrated liquid is discharged from the discharge port 15.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for recovering hydrocarbon cleaning agents and reducing industrial wastewater, characterized in that: The invention comprises a distillation kettle (2), an evaporator, a first baffle heat exchanger, a second baffle heat exchanger, a cleaning agent storage tank (9) and a distilled water storage tank (10). An electric heating device (1) is arranged at the bottom of the distillation kettle (2). The distillation kettle (2) is connected to the first baffle heat exchanger and the second baffle heat exchanger respectively through the evaporator. The first baffle heat exchanger is connected to the cleaning agent storage tank (9), the second baffle heat exchanger is connected to the distilled water storage tank (10), the first baffle heat exchanger is connected to the distillation kettle (2), and the second baffle heat exchanger is connected to the evaporator.

2. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: The cleaning agent storage tank (9) is connected in parallel with a first branch, on which a first vacuum pump (11) is arranged; the distilled water storage tank (10) is connected in parallel with a second branch, on which a second vacuum pump (12) is arranged.

3. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: An evaporator shell side (3) and an evaporator tube side (4) are arranged in the evaporator.

4. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: A first baffle plate heat exchanger shell side (5) and a first baffle plate heat exchanger tube side (6) are arranged in the first baffle plate heat exchanger.

5. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: A second baffle plate heat exchanger shell side (7) and a second baffle plate heat exchanger tube side (8) are arranged in the second baffle plate heat exchanger.

6. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: The cleaning agent storage tank (9) is provided with a liquid outlet (13).

7. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: The distillation kettle (2) is provided with a liquid discharge port (16).

8. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: A first liquid level sensor (17) is arranged on the evaporator.

9. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: A second liquid level sensor (18) is arranged on the distillation kettle (2).

10. The equipment for recovering hydrocarbon cleaning agents and reducing industrial wastewater as claimed in claim 1, characterized in that: A temperature sensor (19) is provided on the distillation kettle (2).

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