Waste gas recovery device for synthesizing heat-conducting oil

Abstract

The utility model relates to a synthetic conduction oil waste gas recovery device which comprises a recovery barrel, a water seal, a vertical shell-and-tube heat exchanger, a condensation plate group, an exhaust pipe, a chilled water outlet, a chilled water inlet and a waste gas inlet, the recovery barrel is arranged below the vertical shell-and-tube heat exchanger, and an outlet at the lower end of the vertical shell-and-tube heat exchanger is connected with the recovery barrel through the water seal; the condensing plate group comprises a fixing screw rod, a first condensing plate, a second condensing plate and a third condensing plate, and the first condensing plate, the second condensing plate and the third condensing plate are conical and are arranged at intervals from top to bottom; the waste gas inlet is formed in the lower part of the vertical shell-and-tube heat exchanger. The device is reasonable in structure and ingenious in design, effectively recovers organic heat carriers in waste gas by utilizing the characteristics of the synthetic heat conduction oil, realizes closed recovery and centralized treatment, effectively reduces the cost, improves the enterprise benefits, and has good market prospects and development space compared with the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of organic heat carrier furnace equipment, specifically to a synthetic heat transfer oil waste gas recovery device. Background Technology

[0002] Organic heat transfer fluid furnaces are primarily used for heating in the chemical industry. The heat carrier in these furnaces is a high-temperature liquid-phase synthetic heat transfer oil, composed of hydrogenated or modified terphenyl. It is mainly used within a temperature range of -7 to 350℃ and exhibits high-temperature stability and good anti-coking properties. Below 80℃, it is non-volatile, liquid, colorless, and odorless. Above 80℃, it reacts with oxygen, undergoing partial fission and releasing gas. Therefore, it is widely used in the chemical industry. The principle is that heat generated by the heat source is transferred to the heat carrier, i.e., the synthetic heat transfer oil, through a heat exchanger. During the heat exchange process, the temperature of the organic heat carrier gradually increases and is maintained within a certain range. The heated organic heat carrier flows through a pipeline system under the action of a heat carrier circulation pump, transferring heat to the required medium, such as process fluids or substances within the reactor. The cooled heat carrier then flows back to the furnace for a new heating cycle.

[0003] The flow of the heat transfer fluid requires a heat transfer fluid circulation pump for power. To ensure system stability, the heat transfer fluid density must be uniform, and there must be no gas or non-uniform media present in the piping system; otherwise, irregular vibrations may occur, potentially leading to accidents. Therefore, an expansion tank is installed in the heat transfer fluid piping system. If gas or oligomers are generated, they will enter the expansion tank through the pipes (the expansion tank is nitrogen-sealed to prevent the heat transfer fluid from contacting oxygen and reacting chemically). The gas is then discharged from the system through the expansion tank's exhaust pipe. These gases are not emitted daily, but they are emitted during startup, shutdown, or when new organic heat transfer fluid is injected. These gases are mostly water vapor and oligomers, have an unpleasant odor, and will pollute the environment and affect human health if released into the atmosphere.

[0004] How to design a synthetic heat transfer oil waste gas recovery device with a reasonable and ingenious structure that utilizes the characteristics of synthetic heat transfer oil to effectively recover the organic heat carrier in the waste gas, achieve closed-loop recovery and centralized treatment, effectively reduce costs and improve enterprise efficiency is a problem that needs to be solved. Utility Model Content

[0005] To address the technical problems of increased costs and environmental pollution caused by water vapor and oligomers mixed in existing heat transfer fluid piping systems, and the impact on human health, this utility model provides a synthetic heat transfer oil waste gas recovery device. This device features a reasonable structure and ingenious design, utilizing the inherent characteristics of synthetic heat transfer oil to effectively recover the organic heat transfer fluid from the waste gas. The closed-loop recovery and centralized disposal effectively reduce costs and improve enterprise efficiency.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a synthetic heat transfer oil waste gas recovery device, including a recovery tank, a water seal, a vertical tube heat exchanger, a condenser plate assembly, an exhaust pipe, a chilled water outlet, a chilled water inlet, and a waste gas inlet. The recovery tank is located below the vertical tube heat exchanger, and the lower outlet of the vertical tube heat exchanger is connected to the recovery tank through a water seal. The condenser plate assembly is located above the vertical tube heat exchanger. The condenser plate assembly includes a fixing screw, a first condenser plate, a second condenser plate, and a third condenser plate. The first condenser plate, the second condenser plate, and the third condenser plate are all conical in shape and are spaced apart from top to bottom. The fixing screw passes through the first condenser plate, the second condenser plate, and the third condenser plate in sequence and fixes them into a whole. The waste gas inlet is located at the lower part of the vertical tube heat exchanger.

[0007] The above is the basic embodiment of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: for example, the tube inlets of the vertical tube heat exchanger are directly below the third condensing plate.

[0008] The above is the basic embodiment of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: for example, the lower edge of the second condensing plate is welded and fixed to the inner wall of the condensing plate assembly, and a circular through hole is opened on the top of the second condensing plate.

[0009] The above is the basic embodiment of this utility model, and further improvements, refinements and limitations can be made on the basis of the above: as described, the exhaust pipe is set on the top of the condenser plate assembly.

[0010] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: as mentioned above, the chilled water outlet and chilled water inlet are respectively located at the upper and lower ends of the vertical tube heat exchanger.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model includes a recovery tank, a water seal, a vertical shell-and-tube heat exchanger, a condenser plate assembly, an exhaust pipe, a chilled water outlet, a chilled water inlet, and a waste gas inlet. By adding a vertical shell-and-tube heat exchanger, the temperature of the exhaust gas is reduced to below 16°C. When the condensed gas is about to exit the heat exchanger, it collides with the condenser plate assembly installed on the top of the shell-and-tube heat exchanger, forcing the condensed waste gas droplets to condense and flow into the collector for centralized recovery, thereby achieving the purpose of waste gas treatment and realizing zero waste gas emissions. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0014] Figure 2 This is a three-dimensional sectional view of the condenser plate assembly.

[0015] The markings in the diagram are: 1. Recycling bin, 2. Water seal, 3. Vertical tube heat exchanger, 4. Condensing plate assembly, 401. Fixing screw, 402. First condensing plate, 403. Second condensing plate, 404. Third condensing plate, 405. Circular through hole, 5. Exhaust pipe, 6. Chilled water outlet, 7. Chilled water inlet, 8. Exhaust gas inlet. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] As shown in the figure, a synthetic heat transfer oil waste gas recovery device includes a recovery tank 1, a water seal 2, a vertical tube heat exchanger 3, a condenser plate assembly 4, an exhaust pipe 5, a chilled water outlet 6, a chilled water inlet 7, and a waste gas inlet 8. The recovery tank 1 is located below the vertical tube heat exchanger 3, and the lower outlet of the vertical tube heat exchanger 3 is connected to the recovery tank 1 through the water seal 2. The condenser plate assembly 4 is located above the vertical tube heat exchanger 3 and includes a fixing screw 401, a first condenser plate 402, a second condenser plate 403, and a third condenser plate 404. The first condenser plate 402, the second condenser plate 403, and the third condenser plate 404 are all conical in shape and are spaced apart from top to bottom. The fixing screw 401 passes through the first condenser plate 402, the second condenser plate 403, and the third condenser plate 404 in sequence and fixes them into a whole. The waste gas inlet 8 is located at the lower part of the vertical tube heat exchanger 3.

[0018] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: for example, the tube inlet of the vertical tube heat exchanger 3 is directly below the third condensing plate 404.

[0019] The above is the basic embodiment of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: for example, the lower edge of the second condensing plate 403 is welded and fixed to the inner wall of the condensing plate assembly 4, and a circular through hole 405 is opened on the top of the second condensing plate 403.

[0020] The above is the basic embodiment of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: as mentioned above, the exhaust pipe 5 is set on the top of the condenser plate group 4.

[0021] The above is the basic implementation of this utility model. Further improvements, refinements and limitations can be made on the basis of the above: as mentioned above, the chilled water outlet 6 and the chilled water inlet 7 are respectively set at the upper and lower ends of the vertical tube heat exchanger 3.

[0022] In practical use, this utility model is installed near the expansion tank or oil storage tank for use in conjunction with other devices. The working process of this utility model is as follows: (Refer to...) Figure 1 , 2When the exhaust gas in the expansion tank or oil storage tank enters the vertical tube heat exchanger 3 through the exhaust gas inlet 8, it is cooled to below 30°C. The exhaust gas is cooled into small liquid droplets, which sink under their own weight and collect as liquid. They converge at the lower end of the vertical tube heat exchanger 3 and flow into the recovery tank 1 through the water seal 2. Some liquid droplets, due to their lighter weight, float to the upper opening of the tubes. When they encounter the condenser plate group 4, they are adsorbed on the surface of the first condenser plate 402, the second condenser plate 403, and the third condenser plate 404, and collect into larger liquid droplets. They flow down the tubes to the lower outlet of the vertical tube heat exchanger 3, converge, and flow into the recovery tank 1 through the water seal 2. The cleaned gas is then discharged into the atmosphere through the exhaust pipe 5.

[0023] This utility model makes key improvements to the condenser plate assembly 4. The first condenser plate 402, the second condenser plate 403 and the third condenser plate 404 are all conical in shape and are spaced apart from top to bottom. The fixing screw 401 passes through the first condenser plate 402, the second condenser plate 403 and the third condenser plate 404 in sequence and fixes them into a whole. When some liquid droplets, due to their light weight, float upwards with the airflow to the upper opening of the tube, they first come into contact with the inclined surface of the third condensing plate 404, converging into large droplets that flow down through the tube to the lower outlet of the vertical tube heat exchanger 3. Uncondensed droplets and gas continue along the outer periphery of the plate surface into the second condensing plate 403. The lower edge of the second condensing plate 403 is welded and fixed to the inner wall of the condensing plate assembly 4. A circular through hole 405 is provided at the top of the second condensing plate 403. Uncondensed droplets and gas gradually pass through the circular through hole 405 and enter the uppermost third condensing plate 404. The third condensing plate 404 has the same structure as the first condensing plate 402. Finally, the remaining droplets converge into large droplets along the inclined surface of the third condensing plate 404, flowing down through the tube to the lower outlet of the vertical tube heat exchanger 3, and then flowing into the recovery tank 1 through the water seal 2. The multi-level plate structure can maximize the removal of water vapor and oligomers mixed in the heat carrier piping system.

[0024] This utility model has a reasonable structure and ingenious design. It utilizes the characteristics of synthetic heat transfer oil to effectively recover organic heat carriers in waste gas. The closed-loop recovery and centralized disposal effectively reduce costs and improve enterprise efficiency. It solves the technical problems of water vapor and oligomers mixed in existing heat carrier pipe systems, which increase costs and cause environmental pollution and affect human health when discharged into the atmosphere. Compared with existing technologies, it has a good market prospect and development space.

[0025] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the concept of the present invention.

Claims

1. A synthetic heat transfer oil waste recovery apparatus, characterized by: The system includes a recovery tank (1), a water seal (2), a vertical tube heat exchanger (3), a condenser plate assembly (4), an exhaust pipe (5), a chilled water outlet (6), a chilled water inlet (7), and a waste gas inlet (8). The recovery tank (1) is located below the vertical tube heat exchanger (3), and the lower outlet of the vertical tube heat exchanger (3) is connected to the recovery tank (1) through the water seal (2). The condenser plate assembly (4) is located above the vertical tube heat exchanger (3), and the condenser plate assembly (4) includes a fixing screw (40). 1) The first condensing plate (402), the second condensing plate (403) and the third condensing plate (404) are all conical in shape and are spaced apart from top to bottom. The fixing screw (401) passes through the first condensing plate (402), the second condensing plate (403) and the third condensing plate (404) in sequence and fixes them into a whole; the exhaust gas inlet (8) is located at the bottom of the vertical tube heat exchanger (3).

2. A synthetic heat transfer oil waste recovery unit as claimed in claim 1, characterized in that: The tube inlets of the vertical tube heat exchanger (3) are directly below the third condenser plate (404).

3. A synthetic heat transfer oil waste recovery unit as claimed in claim 1, wherein: The lower edge of the second condenser plate (403) is welded and fixed to the inner wall of the condenser plate assembly (4), and a circular through hole (405) is provided on the top of the second condenser plate (403).

4. A synthetic heat transfer oil waste recovery unit as set forth in claim 1, characterized by: The exhaust pipe (5) is located on top of the condenser plate assembly (4).

5. A synthetic heat transfer oil waste recovery unit as set forth in claim 1, characterized by: The chilled water outlet (6) and chilled water inlet (7) are respectively located at the upper and lower ends of the vertical tube heat exchanger (3).

Images