Pipeline type wet oxidation equipment based on heat conduction oil circulation

Abstract

The utility model discloses pipeline type wet oxidation equipment based on conduction oil circulation, which belongs to the field of industrial wastewater treatment and comprises an oxygen storage tank, a high-pressure pump communicated with an outlet end of the oxygen storage tank and a raw material tank communicated with an inlet end of the high-pressure pump. A heater communicated with the oxygen storage tank is arranged at the outlet end of the oxygen storage tank, and a heat conduction oil pump communicated with the heater is arranged at the oil liquid inlet end of the heater. The pipeline type wet oxidation equipment based on heat conduction oil circulation is simple in structure and convenient to use, heat is recycled through heat conduction oil circulation by arranging the heater, the reactor and the cooler, heat conduction oil is high in boiling point and free of corrosion, so that a heat conduction oil circulation pipeline can operate at normal pressure, corrosion-resistant precious materials do not need to be selected, and the cost is low. Meanwhile, the pipeline type reactor is used, so that the safety level is higher, the reaction rate is higher, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a pipeline type wet oxidation device based on heat transfer oil circulation. Background Art

[0002] High COD wastewater is widely present in industrial wastewater, leachate, hazardous waste and other fields. These wastewaters generally have the characteristics of high COD concentration, toxic and harmful components, poor biodegradability, and difficulty in treatment.

[0003] There are currently several treatment methods for high COD wastewater:

[0004] 1. Biochemical treatment: Biochemical treatment of COD-containing wastewater has low cost and mature technology.

[0005] 2. Low-temperature advanced oxidation processes such as Fenton / ozone catalytic oxidation / electrochemical oxidation: These processes can remove part of the COD.

[0006] 3. Wet oxidation process: The wet oxidation process can effectively remove the difficult-to-degrade organic matter in the wastewater and effectively reduce the COD of the wastewater.

[0007] However, when using biochemical treatment, it is difficult for microorganisms to survive in large numbers in wastewater containing toxic and harmful components, resulting in poor biochemical treatment effects; the use of low-temperature advanced oxidation technology also has disadvantages such as high treatment costs and substandard treatment effects; the use of traditional wet oxidation equipment has high investment costs and high-temperature and high-pressure operation risks.

[0008] Therefore, the utility model provides a pipeline wet oxidation device based on heat transfer oil circulation to solve the above problems. Utility Model Content

[0009] 1. Technical issues to be resolved

[0010] The utility model provides a pipeline wet oxidation device based on heat transfer oil circulation, aiming to solve the problems of high cost and great danger of existing high COD wastewater treatment proposed in the background technology.

[0011] (II) Technical solution

[0012] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipeline wet oxidation equipment based on heat transfer oil circulation, in order to solve the problem of high cost and high risk of high COD wastewater treatment, including an oxygen storage tank, a high-pressure pump connected to the outlet end of the oxygen storage tank, and a raw material tank connected to the inlet end of the high-pressure pump, the outlet end of the oxygen storage tank is provided with a heater connected to the oxygen storage tank, the oil inlet end of the heater is provided with a heat transfer oil pump connected to the heater, the inlet end of the heat transfer oil pump is provided with a heat transfer oil heating tank, the outlet end of the heater is provided with a reactor connected to the heater, the outlet end of the reactor is provided with a cooler connected to the reactor, the oil outlet end of the heater is connected to the oil inlet end of the cooler, and the oil outlet end of the reactor is connected to the inlet end of the heat transfer oil heating tank. The use of heat transfer oil circulation to recover the heat energy generated by the wet oxidation process greatly reduces the working pressure of the shell side of the heat exchange equipment and the investment cost of the heat exchanger.

[0013] Preferably, in order to solve the pumping problem of high COD wastewater, the head of the high-pressure pump is 7-10 MPa. The head of the high-pressure pump can ensure the pumping of high COD wastewater.

[0014] Preferably, in order to solve the problem of heat exchange between wastewater and thermal oil, the heater, the reactor and the cooler are shell-and-tube structures. The shell-and-tube structure can efficiently perform heat exchange.

[0015] Preferably, in order to solve the path problem of wastewater and heat transfer oil, the shell-and-tube structure is provided with a tube side and a shell side. Wastewater flows through the tube side, and heat transfer oil flows through the shell side, thus ensuring the paths of both.

[0016] Preferably, in order to solve the problem of heating the thermal oil, the thermal oil heating tank is provided with an electric heating component. The thermal oil in the thermal oil heating tank can be heated by the electric heating component to ensure its temperature.

[0017] (III) Beneficial effects

[0018] The pipeline wet oxidation equipment based on thermal oil circulation has a simple structure and is easy to use. By setting a heater, a reactor and a cooler, heat is recovered by circulating the thermal oil. Since the thermal oil has a high boiling point and is non-corrosive, the thermal oil circulation pipeline can operate at normal pressure, and there is no need to use expensive corrosion-resistant materials, which greatly reduces the cost of the heat exchanger. At the same time, the use of a pipeline reactor has a higher safety level, a faster reaction rate and a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a pipeline wet oxidation device based on heat transfer oil circulation;

[0020] Figure 2 The present invention is a process flow chart of a pipeline wet oxidation equipment based on heat transfer oil circulation.

[0021] In the figure: 1. Oxygen storage tank; 2. Raw material tank; 3. High-pressure pump; 4. Thermal oil pump; 5. Thermal oil heating tank; 6. Heater; 7. Reactor; 8. Cooler. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a pipeline wet oxidation device based on heat transfer oil circulation, such as Figure 1-2 As shown, the pipeline wet oxidation equipment includes an oxygen storage tank 1, a high-pressure pump 3 connected to the outlet end of the oxygen storage tank 1, and a raw material tank 2 connected to the inlet end of the high-pressure pump 3, the outlet end of the oxygen storage tank 1 is provided with a heater 6 connected to the oxygen storage tank 1, the oil inlet end of the heater 6 is provided with a thermal oil pump 4 connected to the heater 6, the inlet end of the thermal oil pump 4 is provided with a thermal oil heating tank 5, the outlet end of the heater 6 is provided with a reactor 7 connected to the heater 6, the outlet end of the reactor 7 is provided with a cooler 8 connected to the reactor 7, the oil outlet end of the heater 6 is connected to the oil inlet end of the cooler 8, and the oil outlet end of the reactor 7 is connected to the inlet end of the thermal oil heating tank 5.

[0024] When in use, high COD wastewater is stored in the raw material tank 2 and is pressurized by the high-pressure pump 3 and fed into the system. At the same time, industrial pure oxygen in the oxygen storage tank 1 is also fed into the system, mixed with the wastewater, and enters the heater 6.

[0025] The heater 6 is a shell and tube structure, the wastewater flows through the tube side, and the high-temperature heat transfer oil flows through the shell side, and the two flow in reverse. The wastewater is heated and then enters the reactor 7;

[0026] Reactor 7 is also a shell and tube structure. The heated high-temperature wastewater flows through the tube side and completes the oxidation reaction in the tube array. The high-temperature heat transfer oil after heat exchange in cooler 8 enters the shell side of reactor 7 and flows in the opposite direction to the wastewater, which plays a role in stabilizing the reaction temperature and collecting the reaction heat. After being oxidized by reactor 7, the wastewater enters cooler 8;

[0027] The cooler 8 is also a shell and tube structure. The wastewater flows through the tube side, and the low-temperature heat transfer oil after heat exchange by the heater 6 flows through the shell side, flowing in the opposite direction to the wastewater to cool it down. The cooled wastewater is discharged from the system and enters the next step.

[0028] Specifically, the lift of the high-pressure pump 3 is 7-10 MPa, ensuring that high COD wastewater can enter the system. The pressure of the oxygen storage tank 1 is 10 MPa, ensuring that industrial pure oxygen can enter the system.

[0029] More specifically, the heater 6, the reactor 7 and the cooler 8 are shell and tube structures, and a tube side and a shell side are arranged inside the shell and tube structure; wastewater flows through the tube side, and heat transfer oil flows through the shell side.

[0030] Furthermore, the thermal oil heating tank 5 is provided with an electric heating component; the thermal oil heating tank 5 and the thermal oil pump 4 are located between the outlet of the reactor 7 and the inlet of the heater 6. When the system is started or the temperature drops during operation, the electric heating component of the thermal oil heating tank 5 can be started to supplement heat for the system.

[0031] 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 within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pipeline wet oxidation device based on heat transfer oil circulation, characterized in that: The invention comprises an oxygen storage tank (1), a high-pressure pump (3) connected to the outlet end of the oxygen storage tank (1), and a raw material tank (2) connected to the inlet end of the high-pressure pump (3); the outlet end of the oxygen storage tank (1) is provided with a heater (6) connected to the oxygen storage tank (1); the oil inlet end of the heater (6) is provided with a heat transfer oil pump (4) connected to the heater (6); the inlet end of the heat transfer oil pump (4) is provided with a heat transfer oil heating tank (5); the outlet end of the heater (6) is provided with a reactor (7) connected to the heater (6); the outlet end of the reactor (7) is provided with a cooler (8) connected to the reactor (7); the oil outlet end of the heater (6) is connected to the oil inlet end of the cooler (8); and the oil outlet end of the reactor (7) is connected to the inlet end of the heat transfer oil heating tank (5).

2. The pipeline wet oxidation equipment based on heat transfer oil circulation according to claim 1 is characterized in that: The high-pressure pump (3) has a head of 7-10 MPa.

3. The pipeline wet oxidation equipment based on heat transfer oil circulation according to claim 1 is characterized in that: The heater (6), the reactor (7) and the cooler (8) are shell and tube structures.

4. The pipeline wet oxidation equipment based on heat transfer oil circulation according to claim 3 is characterized in that: The shell and tube structure is internally provided with a tube side and a shell side.

5. The pipeline wet oxidation equipment based on heat transfer oil circulation according to claim 1 is characterized in that: The thermal oil heating tank (5) is provided with an electric heating component.

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